discourse/spec/requests/topics_controller_spec.rb

# coding: utf-8
# frozen_string_literal: true

RSpec.describe TopicsController do
  fab!(:topic) { Fabricate(:topic) }
  fab!(:dest_topic) { Fabricate(:topic) }
  fab!(:invisible_topic) { Fabricate(:topic, visible: false) }

  fab!(:pm) { Fabricate(:private_message_topic) }

  fab!(:user) { Fabricate(:user) }
  fab!(:user_2) { Fabricate(:user) }
  fab!(:post_author1) { Fabricate(:user) }
  fab!(:post_author2) { Fabricate(:user) }
  fab!(:post_author3) { Fabricate(:user) }
  fab!(:post_author4) { Fabricate(:user) }
  fab!(:post_author5) { Fabricate(:user) }
  fab!(:post_author6) { Fabricate(:user) }
  fab!(:moderator) { Fabricate(:moderator) }
  fab!(:admin) { Fabricate(:admin) }
  fab!(:trust_level_0) { Fabricate(:trust_level_0) }
  fab!(:trust_level_1) { Fabricate(:trust_level_1) }
  fab!(:trust_level_4) { Fabricate(:trust_level_4) }

  fab!(:category) { Fabricate(:category) }
  fab!(:tracked_category) { Fabricate(:category) }
  fab!(:shared_drafts_category) { Fabricate(:category) }
  fab!(:staff_category) do
    Fabricate(:category).tap do |staff_category|
      staff_category.set_permissions(staff: :full)
      staff_category.save!
    end
  end

  fab!(:group_user) { Fabricate(:group_user) }

  fab!(:tag) { Fabricate(:tag) }

  before do
    [
      user,
      user_2,
      post_author1,
      post_author2,
      post_author3,
      post_author4,
      post_author5,
      post_author6,
      trust_level_0,
      trust_level_1,
      trust_level_4,
    ].each { |u| Group.user_trust_level_change!(u.id, u.trust_level) }
  end

  describe "#wordpress" do
    before { sign_in(moderator) }

    fab!(:p1) { Fabricate(:post, user: moderator) }
    fab!(:p2) { Fabricate(:post, topic: p1.topic, user: moderator) }

    it "returns the JSON in the format our wordpress plugin needs" do
      SiteSetting.external_system_avatars_enabled = false

      get "/t/#{p1.topic.id}/wordpress.json", params: { best: 3 }

      expect(response.status).to eq(200)
      json = response.parsed_body

      # The JSON has the data the wordpress plugin needs
      expect(json["id"]).to eq(p1.topic.id)
      expect(json["posts_count"]).to eq(2)
      expect(json["filtered_posts_count"]).to eq(2)

      # Posts
      expect(json["posts"].size).to eq(1)
      post = json["posts"][0]
      expect(post["id"]).to eq(p2.id)
      expect(post["username"]).to eq(moderator.username)
      expect(post["avatar_template"]).to eq(
        "#{Discourse.base_url_no_prefix}#{moderator.avatar_template}",
      )
      expect(post["name"]).to eq(moderator.name)
      expect(post["created_at"]).to be_present
      expect(post["cooked"]).to eq(p2.cooked)

      # Participants
      expect(json["participants"].size).to eq(1)
      participant = json["participants"][0]
      expect(participant["id"]).to eq(moderator.id)
      expect(participant["username"]).to eq(moderator.username)
      expect(participant["avatar_template"]).to eq(
        "#{Discourse.base_url_no_prefix}#{moderator.avatar_template}",
      )
    end
  end

  describe "#move_posts" do
    before do
      SiteSetting.min_topic_title_length = 2
      SiteSetting.tagging_enabled = true
    end

    it "needs you to be logged in" do
      post "/t/111/move-posts.json", params: { title: "blah", post_ids: [1, 2, 3] }
      expect(response.status).to eq(403)
    end

    describe "moving to a new topic" do
      fab!(:p1) { Fabricate(:post, user: user, post_number: 1) }
      let(:p2) { Fabricate(:post, user: user, post_number: 2, topic: p1.topic) }
      let(:topic) { p1.topic }

      it "raises an error without post_ids" do
        sign_in(moderator)
        post "/t/#{topic.id}/move-posts.json", params: { title: "blah" }
        expect(response.status).to eq(400)
      end

      it "raises an error when the user doesn't have permission to move the posts" do
        sign_in(user)

        post "/t/#{topic.id}/move-posts.json",
             params: {
               title: "blah",
               post_ids: [p1.post_number, p2.post_number],
             }

        expect(response).to be_forbidden
      end

      it "raises an error when the OP is not a regular post" do
        sign_in(moderator)
        p2 =
          Fabricate(
            :post,
            user: post_author1,
            topic: topic,
            post_number: 2,
            post_type: Post.types[:whisper],
          )
        p3 = Fabricate(:post, user: post_author2, topic: topic, post_number: 3)

        post "/t/#{topic.id}/move-posts.json", params: { title: "blah", post_ids: [p2.id, p3.id] }
        expect(response.status).to eq(422)

        result = response.parsed_body

        expect(result["errors"]).to be_present
      end

      context "with success" do
        before { sign_in(admin) }

        it "returns success" do
          expect do
            post "/t/#{topic.id}/move-posts.json",
                 params: {
                   title: "Logan is a good movie",
                   post_ids: [p2.id],
                   category_id: category.id,
                   tags: %w[foo bar],
                 }
          end.to change { Topic.count }.by(1).and change { Tag.count }.by(2)

          expect(response.status).to eq(200)

          result = response.parsed_body

          expect(result["success"]).to eq(true)

          new_topic = Topic.last
          expect(result["url"]).to eq(new_topic.relative_url)
          expect(new_topic.excerpt).to eq(p2.excerpt_for_topic)
          expect(Tag.all.pluck(:name)).to include("foo", "bar")
        end

        describe "when topic has been deleted" do
          it "should still be able to move posts" do
            PostDestroyer.new(admin, topic.first_post).destroy

            expect(topic.reload.deleted_at).to_not be_nil

            expect do
              post "/t/#{topic.id}/move-posts.json",
                   params: {
                     title: "Logan is a good movie",
                     post_ids: [p2.id],
                     category_id: category.id,
                   }
            end.to change { Topic.count }.by(1)

            expect(response.status).to eq(200)

            result = response.parsed_body

            expect(result["success"]).to eq(true)
            expect(result["url"]).to eq(Topic.last.relative_url)
          end
        end
      end

      context "with failure" do
        it "returns JSON with a false success" do
          sign_in(moderator)
          post "/t/#{topic.id}/move-posts.json", params: { post_ids: [p2.id] }
          expect(response.status).to eq(200)
          result = response.parsed_body
          expect(result["success"]).to eq(false)
          expect(result["url"]).to be_blank
        end
      end

      describe "moving replied posts" do
        context "with success" do
          it "moves the child posts too" do
            sign_in(moderator)
            p1 = Fabricate(:post, topic: topic, user: moderator)
            p2 =
              Fabricate(:post, topic: topic, user: moderator, reply_to_post_number: p1.post_number)
            PostReply.create(post_id: p1.id, reply_post_id: p2.id)

            post "/t/#{topic.id}/move-posts.json",
                 params: {
                   title: "new topic title",
                   post_ids: [p1.id],
                   reply_post_ids: [p1.id],
                 }
            expect(response.status).to eq(200)

            p1.reload
            p2.reload

            new_topic_id = response.parsed_body["url"].split("/").last.to_i
            new_topic = Topic.find(new_topic_id)
            expect(p1.topic.id).to eq(new_topic.id)
            expect(p2.topic.id).to eq(new_topic.id)
            expect(p2.reply_to_post_number).to eq(p1.post_number)
          end
        end
      end
    end

    describe "moving to a new topic as a group moderator" do
      fab!(:category) { Fabricate(:category, reviewable_by_group: group_user.group) }
      fab!(:topic) { Fabricate(:topic, category: category) }
      fab!(:p1) { Fabricate(:post, user: group_user.user, post_number: 1, topic: topic) }
      fab!(:p2) { Fabricate(:post, user: group_user.user, post_number: 2, topic: topic) }
      let!(:user) { group_user.user }

      before do
        sign_in(user)
        SiteSetting.enable_category_group_moderation = true
      end

      it "moves the posts" do
        expect do
          post "/t/#{topic.id}/move-posts.json",
               params: {
                 title: "Logan is a good movie",
                 post_ids: [p2.id],
                 category_id: category.id,
               }
        end.to change { Topic.count }.by(1)

        expect(response.status).to eq(200)
        result = response.parsed_body
        expect(result["success"]).to eq(true)
        expect(result["url"]).to eq(Topic.last.relative_url)
      end

      it "does not allow posts to be moved to a private category" do
        post "/t/#{topic.id}/move-posts.json",
             params: {
               title: "Logan is a good movie",
               post_ids: [p2.id],
               category_id: staff_category.id,
             }

        expect(response).to be_forbidden
      end

      it "does not allow posts outside of the category to be moved" do
        topic.update!(category: nil)

        post "/t/#{topic.id}/move-posts.json",
             params: {
               title: "blah",
               post_ids: [p1.post_number, p2.post_number],
             }

        expect(response).to be_forbidden
      end
    end

    describe "moving to an existing topic" do
      before { sign_in(moderator) }

      fab!(:p1) { Fabricate(:post, user: moderator) }
      fab!(:topic) { p1.topic }
      fab!(:p2) { Fabricate(:post, user: moderator, topic: topic) }

      context "with success" do
        it "returns success" do
          post "/t/#{topic.id}/move-posts.json",
               params: {
                 post_ids: [p2.id],
                 destination_topic_id: dest_topic.id,
               }

          expect(response.status).to eq(200)
          result = response.parsed_body
          expect(result["success"]).to eq(true)
          expect(result["url"]).to be_present
        end

        it "triggers an event on merge" do
          begin
            called = false

            assert = ->(original_topic, destination_topic) {
              called = true
              expect(original_topic).to eq(topic)
              expect(destination_topic).to eq(dest_topic)
            }

            DiscourseEvent.on(:topic_merged, &assert)

            post "/t/#{topic.id}/move-posts.json",
                 params: {
                   post_ids: [p2.id],
                   destination_topic_id: dest_topic.id,
                 }

            expect(called).to eq(true)
            expect(response.status).to eq(200)
          ensure
            DiscourseEvent.off(:topic_merged, &assert)
          end
        end
      end

      context "with failure" do
        fab!(:p2) { Fabricate(:post, user: moderator) }
        it "returns JSON with a false success" do
          post "/t/#{topic.id}/move-posts.json", params: { post_ids: [p2.id] }

          expect(response.status).to eq(200)
          result = response.parsed_body
          expect(result["success"]).to eq(false)
          expect(result["url"]).to be_blank
        end

        it "returns plugin validation error" do
          # stub here is to simulate validation added by plugin which would be triggered when post is moved
          PostCreator.any_instance.stubs(:skip_validations?).returns(false)

          p1.update_columns(raw: "i", cooked: "")
          post "/t/#{topic.id}/move-posts.json",
               params: {
                 post_ids: [p1.id],
                 destination_topic_id: dest_topic.id,
               }

          expect(response.status).to eq(422)
          result = response.parsed_body
          expect(result["errors"]).to eq(
            [
              "Body is too short (minimum is 5 characters) and Body seems unclear, is it a complete sentence?",
            ],
          )
        end
      end
    end

    describe "moving to an existing topic as a group moderator" do
      fab!(:category) { Fabricate(:category, reviewable_by_group: group_user.group) }
      fab!(:topic) { Fabricate(:topic, category: category) }
      fab!(:p1) { Fabricate(:post, user: group_user.user, post_number: 1, topic: topic) }
      fab!(:p2) { Fabricate(:post, user: group_user.user, post_number: 2, topic: topic) }

      let!(:user) { group_user.user }

      before do
        sign_in(user)
        SiteSetting.enable_category_group_moderation = true
      end

      it "moves the posts" do
        post "/t/#{topic.id}/move-posts.json",
             params: {
               post_ids: [p2.id],
               destination_topic_id: dest_topic.id,
             }

        expect(response.status).to eq(200)
        result = response.parsed_body
        expect(result["success"]).to eq(true)
        expect(result["url"]).to be_present
      end

      it "does not allow posts to be moved to a private category" do
        dest_topic.update!(category: staff_category)

        post "/t/#{topic.id}/move-posts.json",
             params: {
               post_ids: [p2.id],
               destination_topic_id: dest_topic.id,
             }

        expect(response).to be_forbidden
      end

      it "does not allow posts outside of the category to be moved" do
        topic.update!(category: nil)

        post "/t/#{topic.id}/move-posts.json",
             params: {
               post_ids: [p1.post_number, p2.post_number],
               destination_topic_id: dest_topic.id,
             }

        expect(response).to be_forbidden
      end
    end

    describe "moving to a new message" do
      fab!(:message) { pm }
      fab!(:p1) { Fabricate(:post, user: user, post_number: 1, topic: message) }
      fab!(:p2) { Fabricate(:post, user: user, post_number: 2, topic: message) }

      it "raises an error without post_ids" do
        sign_in(moderator)
        post "/t/#{message.id}/move-posts.json",
             params: {
               title: "blah",
               archetype: "private_message",
             }
        expect(response.status).to eq(400)
      end

      it "raises an error when the user doesn't have permission to move the posts" do
        sign_in(trust_level_4)

        post "/t/#{message.id}/move-posts.json",
             params: {
               title: "blah",
               post_ids: [p1.post_number, p2.post_number],
               archetype: "private_message",
             }

        expect(response.status).to eq(403)
        result = response.parsed_body
        expect(result["errors"]).to be_present
      end

      context "with success" do
        before { sign_in(admin) }

        it "returns success" do
          SiteSetting.pm_tags_allowed_for_groups = "1|2|3"

          expect do
            post "/t/#{message.id}/move-posts.json",
                 params: {
                   title: "Logan is a good movie",
                   post_ids: [p2.id],
                   archetype: "private_message",
                   tags: %w[foo bar],
                 }
          end.to change { Topic.count }.by(1).and change { Tag.count }.by(2)

          expect(response.status).to eq(200)

          result = response.parsed_body

          expect(result["success"]).to eq(true)
          expect(result["url"]).to eq(Topic.last.relative_url)
          expect(Tag.all.pluck(:name)).to include("foo", "bar")
        end

        describe "when message has been deleted" do
          it "should still be able to move posts" do
            PostDestroyer.new(admin, message.first_post).destroy

            expect(message.reload.deleted_at).to_not be_nil

            expect do
              post "/t/#{message.id}/move-posts.json",
                   params: {
                     title: "Logan is a good movie",
                     post_ids: [p2.id],
                     archetype: "private_message",
                   }
            end.to change { Topic.count }.by(1)

            expect(response.status).to eq(200)

            result = response.parsed_body

            expect(result["success"]).to eq(true)
            expect(result["url"]).to eq(Topic.last.relative_url)
          end
        end
      end

      context "with failure" do
        it "returns JSON with a false success" do
          sign_in(moderator)
          post "/t/#{message.id}/move-posts.json",
               params: {
                 post_ids: [p2.id],
                 archetype: "private_message",
               }
          expect(response.status).to eq(200)
          result = response.parsed_body
          expect(result["success"]).to eq(false)
          expect(result["url"]).to be_blank
        end
      end
    end

    describe "moving to an existing message" do
      before { sign_in(admin) }

      fab!(:evil_trout) { Fabricate(:evil_trout) }
      fab!(:message) { pm }
      fab!(:p2) { Fabricate(:post, user: evil_trout, post_number: 2, topic: message) }

      fab!(:dest_message) do
        Fabricate(
          :private_message_topic,
          user: trust_level_4,
          topic_allowed_users: [Fabricate.build(:topic_allowed_user, user: evil_trout)],
        )
      end

      context "with success" do
        it "returns success" do
          post "/t/#{message.id}/move-posts.json",
               params: {
                 post_ids: [p2.id],
                 destination_topic_id: dest_message.id,
                 archetype: "private_message",
               }

          expect(response.status).to eq(200)
          result = response.parsed_body
          expect(result["success"]).to eq(true)
          expect(result["url"]).to be_present
        end
      end

      context "with failure" do
        it "returns JSON with a false success" do
          post "/t/#{message.id}/move-posts.json",
               params: {
                 post_ids: [p2.id],
                 archetype: "private_message",
               }

          expect(response.status).to eq(200)
          result = response.parsed_body
          expect(result["success"]).to eq(false)
          expect(result["url"]).to be_blank
        end
      end
    end
  end

  describe "#merge_topic" do
    it "needs you to be logged in" do
      post "/t/111/merge-topic.json", params: { destination_topic_id: 345 }
      expect(response.status).to eq(403)
    end

    describe "merging into another topic" do
      fab!(:p1) { Fabricate(:post, user: user) }
      fab!(:topic) { p1.topic }

      it "raises an error without destination_topic_id" do
        sign_in(moderator)
        post "/t/#{topic.id}/merge-topic.json"
        expect(response.status).to eq(400)
      end

      it "raises an error when the user doesn't have permission to merge" do
        sign_in(user)
        post "/t/111/merge-topic.json", params: { destination_topic_id: 345 }
        expect(response).to be_forbidden
      end

      context "when moving all the posts to the destination topic" do
        it "returns success" do
          sign_in(moderator)
          post "/t/#{topic.id}/merge-topic.json", params: { destination_topic_id: dest_topic.id }

          expect(response.status).to eq(200)
          result = response.parsed_body
          expect(result["success"]).to eq(true)
          expect(result["url"]).to be_present
        end
      end
    end

    describe "merging into another topic as a group moderator" do
      fab!(:category) { Fabricate(:category, reviewable_by_group: group_user.group) }
      fab!(:topic) { Fabricate(:topic, category: category) }
      fab!(:p1) { Fabricate(:post, user: post_author1, post_number: 1, topic: topic) }
      fab!(:p2) { Fabricate(:post, user: post_author2, post_number: 2, topic: topic) }

      before do
        sign_in(group_user.user)
        SiteSetting.enable_category_group_moderation = true
      end

      it "moves the posts" do
        post "/t/#{topic.id}/merge-topic.json", params: { destination_topic_id: dest_topic.id }

        expect(response.status).to eq(200)
        result = response.parsed_body
        expect(result["success"]).to eq(true)
        expect(result["url"]).to be_present
      end

      it "does not allow posts to be moved to a private category" do
        dest_topic.update!(category: staff_category)

        post "/t/#{topic.id}/merge-topic.json", params: { destination_topic_id: dest_topic.id }

        expect(response).to be_forbidden
      end

      it "does not allow posts outside of the category to be moved" do
        topic.update!(category: nil)

        post "/t/#{topic.id}/merge-topic.json", params: { destination_topic_id: dest_topic.id }

        expect(response).to be_forbidden
      end
    end

    describe "merging into another message" do
      fab!(:message) { Fabricate(:private_message_topic, user: user) }
      fab!(:p1) { Fabricate(:post, topic: message, user: trust_level_4) }
      fab!(:p2) do
        Fabricate(:post, topic: message, reply_to_post_number: p1.post_number, user: user)
      end

      fab!(:dest_message) do
        Fabricate(
          :private_message_topic,
          user: trust_level_4,
          topic_allowed_users: [Fabricate.build(:topic_allowed_user, user: moderator)],
        )
      end

      it "raises an error without destination_topic_id" do
        sign_in(moderator)
        post "/t/#{message.id}/merge-topic.json", params: { archetype: "private_message" }
        expect(response.status).to eq(400)
      end

      it "raises an error when the user doesn't have permission to merge" do
        sign_in(trust_level_4)
        post "/t/#{message.id}/merge-topic.json",
             params: {
               destination_topic_id: 345,
               archetype: "private_message",
             }
        expect(response).to be_forbidden
      end

      context "when moving all the posts to the destination message" do
        it "returns success" do
          sign_in(moderator)
          post "/t/#{message.id}/merge-topic.json",
               params: {
                 destination_topic_id: dest_message.id,
                 archetype: "private_message",
               }

          expect(response.status).to eq(200)
          result = response.parsed_body
          expect(result["success"]).to eq(true)
          expect(result["url"]).to be_present
        end
      end
    end
  end

  describe "#change_post_owners" do
    it "needs you to be logged in" do
      post "/t/111/change-owner.json", params: { username: "user_a", post_ids: [1, 2, 3] }
      expect(response).to be_forbidden
    end

    describe "forbidden to trust_level_4s" do
      before { sign_in(trust_level_4) }

      it "correctly denies" do
        post "/t/111/change-owner.json",
             params: {
               topic_id: 111,
               username: "user_a",
               post_ids: [1, 2, 3],
             }
        expect(response).to be_forbidden
      end
    end

    describe "changing ownership" do
      fab!(:user_a) { Fabricate(:user) }
      fab!(:p1) { Fabricate(:post, user: post_author1, topic: topic) }
      fab!(:p2) { Fabricate(:post, user: post_author2, topic: topic) }

      describe "moderator signed in" do
        let!(:editor) { sign_in(moderator) }

        it "returns 200 when moderators_change_post_ownership is true" do
          SiteSetting.moderators_change_post_ownership = true

          post "/t/#{topic.id}/change-owner.json",
               params: {
                 username: user_a.username_lower,
                 post_ids: [p1.id],
               }
          expect(response.status).to eq(200)
        end

        it "returns 403 when moderators_change_post_ownership is false" do
          SiteSetting.moderators_change_post_ownership = false

          post "/t/#{topic.id}/change-owner.json",
               params: {
                 username: user_a.username_lower,
                 post_ids: [p1.id],
               }
          expect(response.status).to eq(403)
        end
      end
      describe "admin signed in" do
        let!(:editor) { sign_in(admin) }

        it "raises an error with a parameter missing" do
          [{ post_ids: [1, 2, 3] }, { username: "user_a" }].each do |params|
            post "/t/111/change-owner.json", params: params
            expect(response.status).to eq(400)
          end
        end

        it "changes the topic and posts ownership" do
          post "/t/#{topic.id}/change-owner.json",
               params: {
                 username: user_a.username_lower,
                 post_ids: [p1.id],
               }
          topic.reload
          p1.reload
          expect(response.status).to eq(200)
          expect(topic.user.username).to eq(user_a.username)
          expect(p1.user.username).to eq(user_a.username)
        end

        it "changes multiple posts" do
          post "/t/#{topic.id}/change-owner.json",
               params: {
                 username: user_a.username_lower,
                 post_ids: [p1.id, p2.id],
               }

          expect(response.status).to eq(200)

          p1.reload
          p2.reload

          expect(p1.user).to_not eq(nil)
          expect(p1.reload.user).to eq(p2.reload.user)
        end

        it "works with deleted users" do
          deleted_user = user
          t2 = Fabricate(:topic, user: deleted_user)
          p3 = Fabricate(:post, topic: t2, user: deleted_user)

          UserDestroyer.new(editor).destroy(
            deleted_user,
            delete_posts: true,
            context: "test",
            delete_as_spammer: true,
          )

          post "/t/#{t2.id}/change-owner.json",
               params: {
                 username: user_a.username_lower,
                 post_ids: [p3.id],
               }

          expect(response.status).to eq(200)
          t2.reload
          p3.reload
          expect(t2.deleted_at).to be_nil
          expect(p3.user).to eq(user_a)
        end

        it "removes likes by new owner" do
          now = Time.zone.now
          freeze_time(now - 1.day)
          PostActionCreator.like(user_a, p1)
          p1.reload
          freeze_time(now)
          post "/t/#{topic.id}/change-owner.json",
               params: {
                 username: user_a.username_lower,
                 post_ids: [p1.id],
               }
          topic.reload
          p1.reload
          expect(response.status).to eq(200)
          expect(topic.user.username).to eq(user_a.username)
          expect(p1.user.username).to eq(user_a.username)
          expect(p1.like_count).to eq(0)
        end
      end
    end
  end

  describe "#change_timestamps" do
    let!(:params) { { timestamp: Time.zone.now } }

    it "needs you to be logged in" do
      put "/t/1/change-timestamp.json", params: params
      expect(response.status).to eq(403)
    end

    describe "forbidden to trust_level_4" do
      before { sign_in(trust_level_4) }

      it "correctly denies" do
        put "/t/1/change-timestamp.json", params: params
        expect(response).to be_forbidden
      end
    end

    describe "changing timestamps" do
      before do
        freeze_time
        sign_in(moderator)
      end

      let!(:old_timestamp) { Time.zone.now }
      let!(:new_timestamp) { old_timestamp - 1.day }
      let!(:topic) { Fabricate(:topic, created_at: old_timestamp) }
      let!(:p1) { Fabricate(:post, user: post_author1, topic: topic, created_at: old_timestamp) }
      let!(:p2) do
        Fabricate(:post, user: post_author2, topic: topic, created_at: old_timestamp + 1.day)
      end

      it "should update the timestamps of selected posts" do
        # try to see if we fail with invalid first
        put "/t/1/change-timestamp.json"
        expect(response.status).to eq(400)

        put "/t/#{topic.id}/change-timestamp.json", params: { timestamp: new_timestamp.to_f }

        expect(response.status).to eq(200)
        expect(topic.reload.created_at).to eq_time(new_timestamp)
        expect(p1.reload.created_at).to eq_time(new_timestamp)
        expect(p2.reload.created_at).to eq_time(old_timestamp)
      end

      it "should create a staff log entry" do
        put "/t/#{topic.id}/change-timestamp.json", params: { timestamp: new_timestamp.to_f }

        log = UserHistory.last
        expect(log.acting_user_id).to eq(moderator.id)
        expect(log.topic_id).to eq(topic.id)
        expect(log.new_value).to eq(new_timestamp.utc.to_s)
        expect(log.previous_value).to eq(old_timestamp.utc.to_s)
      end
    end
  end

  describe "#clear_pin" do
    it "needs you to be logged in" do
      put "/t/1/clear-pin.json"
      expect(response.status).to eq(403)
    end

    context "when logged in" do
      before { sign_in(user) }

      it "fails when the user can't see the topic" do
        put "/t/#{pm.id}/clear-pin.json"
        expect(response).to be_forbidden
      end

      describe "when the user can see the topic" do
        it "succeeds" do
          expect do put "/t/#{topic.id}/clear-pin.json" end.to change {
            TopicUser.where(topic_id: topic.id, user_id: user.id).count
          }.by(1)
          expect(response.status).to eq(200)
        end
      end
    end
  end

  describe "#status" do
    it "needs you to be logged in" do
      put "/t/1/status.json", params: { status: "visible", enabled: true }
      expect(response.status).to eq(403)
    end

    describe "when logged in as a moderator" do
      before { sign_in(moderator) }

      it "raises an exception if you can't change it" do
        sign_in(user)
        put "/t/#{topic.id}/status.json", params: { status: "visible", enabled: "true" }
        expect(response).to be_forbidden
      end

      it "requires the status parameter" do
        put "/t/#{topic.id}/status.json", params: { enabled: true }
        expect(response.status).to eq(400)
      end

      it "requires the enabled parameter" do
        put "/t/#{topic.id}/status.json", params: { status: "visible" }
        expect(response.status).to eq(400)
      end

      it "raises an error with a status not in the allowlist" do
        put "/t/#{topic.id}/status.json", params: { status: "title", enabled: "true" }
        expect(response.status).to eq(400)
      end

      it "should update the status of the topic correctly" do
        closed_user_topic = Fabricate(:topic, user: user, closed: true)
        Fabricate(:topic_timer, topic: closed_user_topic, status_type: TopicTimer.types[:open])

        put "/t/#{closed_user_topic.id}/status.json", params: { status: "closed", enabled: "false" }

        expect(response.status).to eq(200)
        expect(closed_user_topic.reload.closed).to eq(false)
        expect(closed_user_topic.topic_timers).to eq([])

        body = response.parsed_body

        expect(body["topic_status_update"]).to eq(nil)
      end
    end

    describe "when logged in as a group member with reviewable status" do
      fab!(:category) { Fabricate(:category, reviewable_by_group: group_user.group) }
      fab!(:topic) { Fabricate(:topic, category: category) }

      before do
        sign_in(group_user.user)
        SiteSetting.enable_category_group_moderation = true
      end

      it "should allow a group moderator to close a topic" do
        put "/t/#{topic.id}/status.json", params: { status: "closed", enabled: "true" }

        expect(response.status).to eq(200)
        expect(topic.reload.closed).to eq(true)
        expect(topic.posts.last.action_code).to eq("closed.enabled")
      end

      it "should allow a group moderator to open a closed topic" do
        topic.update!(closed: true)

        expect do
          put "/t/#{topic.id}/status.json", params: { status: "closed", enabled: "false" }
        end.to change { topic.reload.posts.count }.by(1)

        expect(response.status).to eq(200)
        expect(topic.reload.closed).to eq(false)
        expect(topic.posts.last.action_code).to eq("closed.disabled")
      end

      it "should allow a group moderator to archive a topic" do
        expect do
          put "/t/#{topic.id}/status.json", params: { status: "archived", enabled: "true" }
        end.to change { topic.reload.posts.count }.by(1)

        expect(response.status).to eq(200)
        expect(topic.reload.archived).to eq(true)
        expect(topic.posts.last.action_code).to eq("archived.enabled")
      end

      it "should allow a group moderator to unarchive an archived topic" do
        topic.update!(archived: true)

        put "/t/#{topic.id}/status.json", params: { status: "archived", enabled: "false" }

        expect(response.status).to eq(200)
        expect(topic.reload.archived).to eq(false)
        expect(topic.posts.last.action_code).to eq("archived.disabled")
      end

      it "should allow a group moderator to pin a topic" do
        put "/t/#{topic.id}/status.json",
            params: {
              status: "pinned",
              enabled: "true",
              until: 2.weeks.from_now,
            }

        expect(response.status).to eq(200)
        expect(topic.reload.pinned_at).to_not eq(nil)
      end

      it "should allow a group moderator to unpin a topic" do
        put "/t/#{topic.id}/status.json", params: { status: "pinned", enabled: "false" }

        expect(response.status).to eq(200)
        expect(topic.reload.pinned_at).to eq(nil)
      end

      it "should allow a group moderator to unlist a topic" do
        put "/t/#{topic.id}/status.json", params: { status: "visible", enabled: "false" }

        expect(response.status).to eq(200)
        expect(topic.reload.visible).to eq(false)
        expect(topic.posts.last.action_code).to eq("visible.disabled")
      end

      it "should allow a group moderator to list an unlisted topic" do
        topic.update!(visible: false)

        put "/t/#{topic.id}/status.json", params: { status: "visible", enabled: "true" }

        expect(response.status).to eq(200)
        expect(topic.reload.visible).to eq(true)
        expect(topic.posts.last.action_code).to eq("visible.enabled")
      end
    end
  end

  describe "#destroy_timings" do
    it "needs you to be logged in" do
      delete "/t/1/timings.json"
      expect(response.status).to eq(403)
    end

    def topic_user_post_timings_count(user, topic)
      [TopicUser, PostTiming].map { |klass| klass.where(user: user, topic: topic).count }
    end

    context "for last post only" do
      it "should allow you to retain topic timing but remove last post only" do
        freeze_time

        post1 = create_post
        user = post1.user

        topic = post1.topic

        post2 = create_post(topic_id: topic.id)

        PostTiming.create!(topic: topic, user: user, post_number: 2, msecs: 100)

        user.user_stat.update!(first_unread_at: Time.now + 1.week)

        topic_user = TopicUser.find_by(topic_id: topic.id, user_id: user.id)

        topic_user.update!(last_read_post_number: 2)

        # ensure we have 2 notifications
        # fake notification on topic but it is read
        first_notification =
          Notification.create!(
            user_id: user.id,
            topic_id: topic.id,
            data: "{}",
            read: true,
            notification_type: 1,
          )

        freeze_time 1.minute.from_now
        PostAlerter.post_created(post2)

        second_notification =
          user.notifications.where(topic_id: topic.id).order(created_at: :desc).first
        second_notification.update!(read: true)

        sign_in(user)

        delete "/t/#{topic.id}/timings.json?last=1"

        expect(PostTiming.where(topic: topic, user: user, post_number: 2).exists?).to eq(false)
        expect(PostTiming.where(topic: topic, user: user, post_number: 1).exists?).to eq(true)

        expect(TopicUser.where(topic: topic, user: user, last_read_post_number: 1).exists?).to eq(
          true,
        )

        user.user_stat.reload
        expect(user.user_stat.first_unread_at).to eq_time(topic.updated_at)

        first_notification.reload
        second_notification.reload
        expect(first_notification.read).to eq(true)
        expect(second_notification.read).to eq(false)

        PostDestroyer.new(admin, post2).destroy

        delete "/t/#{topic.id}/timings.json?last=1"

        expect(PostTiming.where(topic: topic, user: user, post_number: 1).exists?).to eq(false)
        expect(TopicUser.where(topic: topic, user: user, last_read_post_number: nil).exists?).to eq(
          true,
        )
      end
    end

    context "when logged in" do
      fab!(:user_topic) { Fabricate(:topic, user: user) }
      fab!(:user_post) { Fabricate(:post, user: user, topic: user_topic, post_number: 2) }

      before do
        sign_in(user)
        TopicUser.create!(topic: user_topic, user: user)
        PostTiming.create!(topic: user_topic, user: user, post_number: 2, msecs: 1000)
      end

      it "deletes the forum topic user and post timings records" do
        expect do delete "/t/#{user_topic.id}/timings.json" end.to change {
          topic_user_post_timings_count(user, user_topic)
        }.from([1, 1]).to([0, 0])
      end
    end
  end

  describe "#mute/unmute" do
    it "needs you to be logged in" do
      put "/t/99/mute.json"
      expect(response.status).to eq(403)
    end

    it "needs you to be logged in" do
      put "/t/99/unmute.json"
      expect(response.status).to eq(403)
    end
  end

  describe "#recover" do
    it "won't allow us to recover a topic when we're not logged in" do
      put "/t/1/recover.json"
      expect(response.status).to eq(403)
    end

    describe "when logged in" do
      let!(:topic) { Fabricate(:topic, user: user, deleted_at: Time.now, deleted_by: moderator) }
      let!(:post) do
        Fabricate(
          :post,
          user: user,
          topic: topic,
          post_number: 1,
          deleted_at: Time.now,
          deleted_by: moderator,
        )
      end

      describe "without access" do
        it "raises an exception when the user doesn't have permission to delete the topic" do
          sign_in(user)
          put "/t/#{topic.id}/recover.json"
          expect(response).to be_forbidden
        end
      end

      context "with permission" do
        before { sign_in(moderator) }

        it "succeeds" do
          put "/t/#{topic.id}/recover.json"
          topic.reload
          post.reload
          expect(response.status).to eq(200)
          expect(topic.trashed?).to be_falsey
          expect(post.trashed?).to be_falsey
        end
      end
    end
  end

  describe "#delete" do
    it "won't allow us to delete a topic when we're not logged in" do
      delete "/t/1.json"
      expect(response.status).to eq(403)
    end

    describe "when logged in" do
      fab!(:topic) { Fabricate(:topic, user: user, created_at: 48.hours.ago) }
      fab!(:post) { Fabricate(:post, topic: topic, user: user, post_number: 1) }

      describe "without access" do
        it "raises an exception when the user doesn't have permission to delete the topic" do
          sign_in(user)
          delete "/t/#{topic.id}.json"
          expect(response.status).to eq(422)
        end
      end

      describe "with permission" do
        before { sign_in(moderator) }

        it "succeeds" do
          delete "/t/#{topic.id}.json"
          expect(response.status).to eq(200)
          topic.reload
          expect(topic.trashed?).to be_truthy
        end
      end
    end

    describe "force destroy" do
      fab!(:post) { Fabricate(:post, topic: topic, post_number: 1) }

      before do
        SiteSetting.can_permanently_delete = true

        sign_in(admin)
      end

      it "force destroys all deleted small actions in topic too" do
        small_action_post = Fabricate(:small_action, topic: topic)
        PostDestroyer.new(Discourse.system_user, post).destroy
        PostDestroyer.new(Discourse.system_user, small_action_post).destroy

        delete "/t/#{topic.id}.json", params: { force_destroy: true }

        expect(response.status).to eq(200)

        expect(Topic.find_by(id: topic.id)).to eq(nil)
        expect(Post.find_by(id: post.id)).to eq(nil)
        expect(Post.find_by(id: small_action_post.id)).to eq(nil)
      end

      it "does not allow to destroy topic if not all posts were force destroyed" do
        other_post = Fabricate(:post, topic: topic, post_number: 2)
        PostDestroyer.new(Discourse.system_user, post).destroy

        delete "/t/#{topic.id}.json", params: { force_destroy: true }

        expect(response.status).to eq(403)
      end

      it "does not allow to destroy topic if not all small action posts were deleted" do
        small_action_post = Fabricate(:small_action, topic: topic)
        PostDestroyer.new(Discourse.system_user, small_action_post).destroy

        delete "/t/#{topic.id}.json", params: { force_destroy: true }

        expect(response.status).to eq(403)
      end
    end
  end

  describe "#id_for_slug" do
    fab!(:topic) { Fabricate(:post, user: post_author1).topic }

    it "returns JSON for the slug" do
      get "/t/id_for/#{topic.slug}.json"
      expect(response.status).to eq(200)
      json = response.parsed_body
      expect(json["topic_id"]).to eq(topic.id)
      expect(json["url"]).to eq(topic.url)
      expect(json["slug"]).to eq(topic.slug)
    end

    it "returns invalid access if the user can't see the topic" do
      get "/t/id_for/#{pm.slug}.json"
      expect(response).to be_forbidden
    end
  end

  describe "#update" do
    it "won't allow us to update a topic when we're not logged in" do
      put "/t/1.json", params: { slug: "xyz" }
      expect(response.status).to eq(403)
    end

    describe "when logged in" do
      fab!(:topic) { Fabricate(:topic, user: user) }

      before_all { Fabricate(:post, user: post_author1, topic: topic) }

      before do
        SiteSetting.editing_grace_period = 0
        sign_in(user)
      end

      it "can not change category to a disallowed category" do
        category.set_permissions(staff: :full)
        category.save!

        put "/t/#{topic.id}.json", params: { category_id: category.id }

        expect(response.status).to eq(403)
        expect(topic.reload.category_id).not_to eq(category.id)
      end

      it "can not move to a category that requires topic approval" do
        category.custom_fields[Category::REQUIRE_TOPIC_APPROVAL] = true
        category.save!

        put "/t/#{topic.id}.json", params: { category_id: category.id }

        expect(response.status).to eq(403)
        expect(topic.reload.category_id).not_to eq(category.id)
      end

      context "when updating shared drafts" do
        fab!(:topic) { Fabricate(:topic, category: shared_drafts_category) }
        fab!(:shared_draft) do
          Fabricate(:shared_draft, topic: topic, category: Fabricate(:category))
        end

        it "changes destination category" do
          put "/t/#{topic.id}.json", params: { category_id: category.id }

          expect(response.status).to eq(403)
          expect(topic.shared_draft.category_id).not_to eq(category.id)
        end
      end

      describe "without permission" do
        it "raises an exception when the user doesn't have permission to update the topic" do
          topic.update!(archived: true)
          put "/t/#{topic.slug}/#{topic.id}.json"

          expect(response.status).to eq(403)
        end
      end

      describe "with permission" do
        fab!(:post_hook) { Fabricate(:post_web_hook) }
        fab!(:topic_hook) { Fabricate(:topic_web_hook) }

        it "succeeds" do
          put "/t/#{topic.slug}/#{topic.id}.json"

          expect(response.status).to eq(200)
          expect(response.parsed_body["basic_topic"]).to be_present
        end

        it "throws an error if it could not be saved" do
          PostRevisor.any_instance.stubs(:should_revise?).returns(false)
          put "/t/#{topic.slug}/#{topic.id}.json", params: { title: "brand new title" }

          expect(response.status).to eq(422)
          expect(response.parsed_body["errors"].first).to eq(
            I18n.t("activerecord.errors.models.topic.attributes.base.unable_to_update"),
          )
        end

        it "can update a topic to an uncategorized topic" do
          topic.update!(category: category)

          put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: "" }

          expect(response.status).to eq(200)
          expect(topic.reload.category_id).to eq(SiteSetting.uncategorized_category_id)
        end

        it "allows a change of title" do
          put "/t/#{topic.slug}/#{topic.id}.json",
              params: {
                title: "This is a new title for the topic",
              }

          topic.reload
          expect(topic.title).to eq("This is a new title for the topic")

          # emits a topic_edited event but not a post_edited web hook event
          expect(Jobs::EmitWebHookEvent.jobs.length).to eq(1)
          job_args = Jobs::EmitWebHookEvent.jobs[0]["args"].first

          expect(job_args["event_name"]).to eq("topic_edited")
          payload = JSON.parse(job_args["payload"])
          expect(payload["title"]).to eq("This is a new title for the topic")
        end

        it "allows update on short non-slug url" do
          put "/t/#{topic.id}.json", params: { title: "This is a new title for the topic" }

          topic.reload
          expect(topic.title).to eq("This is a new title for the topic")
        end

        it "only allows update on digit ids" do
          non_digit_id = "asdf"
          original_title = topic.title
          put "/t/#{non_digit_id}.json", params: { title: "This is a new title for the topic" }

          topic.reload
          expect(topic.title).to eq(original_title)
          expect(response.status).to eq(404)
        end

        it "allows a change of then updating the OP" do
          topic.update(user: user)
          topic.first_post.update(user: user)

          put "/t/#{topic.slug}/#{topic.id}.json",
              params: {
                title: "This is a new title for the topic",
              }

          topic.reload
          expect(topic.title).to eq("This is a new title for the topic")

          update_params = { post: { raw: "edited body", edit_reason: "typo" } }
          put "/posts/#{topic.first_post.id}.json", params: update_params

          # emits a topic_edited event and a post_edited web hook event
          expect(Jobs::EmitWebHookEvent.jobs.length).to eq(2)
          job_args = Jobs::EmitWebHookEvent.jobs[0]["args"].first

          expect(job_args["event_name"]).to eq("topic_edited")
          payload = JSON.parse(job_args["payload"])
          expect(payload["title"]).to eq("This is a new title for the topic")

          job_args = Jobs::EmitWebHookEvent.jobs[1]["args"].first

          expect(job_args["event_name"]).to eq("post_edited")
          payload = JSON.parse(job_args["payload"])
          expect(payload["raw"]).to eq("edited body")
        end

        it "returns errors with invalid titles" do
          put "/t/#{topic.slug}/#{topic.id}.json", params: { title: "asdf" }

          expect(response.status).to eq(422)
          expect(response.parsed_body["errors"]).to match_array(
            [/Title is too short/, /Title seems unclear/],
          )
        end

        it "returns errors when the rate limit is exceeded" do
          EditRateLimiter
            .any_instance
            .expects(:performed!)
            .raises(RateLimiter::LimitExceeded.new(60))

          put "/t/#{topic.slug}/#{topic.id}.json",
              params: {
                title: "This is a new title for the topic",
              }

          expect(response.status).to eq(429)
        end

        it "returns errors with invalid categories" do
          put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: -1 }

          expect(response.status).to eq(422)
        end

        it "doesn't call the PostRevisor when there is no changes" do
          expect do
            put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: topic.category_id }
          end.not_to change(PostRevision.all, :count)

          expect(response.status).to eq(200)
        end

        context "when using SiteSetting.disable_category_edit_notifications" do
          it "doesn't bump the topic if the setting is enabled" do
            SiteSetting.disable_category_edit_notifications = true
            last_bumped_at = topic.bumped_at
            expect(last_bumped_at).not_to be_nil

            expect do
              put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: category.id }
            end.to change { topic.reload.category_id }.to(category.id)

            expect(response.status).to eq(200)
            expect(topic.reload.bumped_at).to eq_time(last_bumped_at)
          end

          it "bumps the topic if the setting is disabled" do
            SiteSetting.disable_category_edit_notifications = false
            last_bumped_at = topic.bumped_at
            expect(last_bumped_at).not_to be_nil

            expect do
              put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: category.id }
            end.to change { topic.reload.category_id }.to(category.id)

            expect(response.status).to eq(200)
            expect(topic.reload.bumped_at).not_to eq_time(last_bumped_at)
          end
        end

        context "when using SiteSetting.disable_tags_edit_notifications" do
          fab!(:t1) { Fabricate(:tag) }
          fab!(:t2) { Fabricate(:tag) }
          let(:tags) { [t1, t2] }

          it "doesn't bump the topic if the setting is enabled" do
            SiteSetting.disable_tags_edit_notifications = true
            last_bumped_at = topic.bumped_at
            expect(last_bumped_at).not_to be_nil

            put "/t/#{topic.slug}/#{topic.id}.json", params: { tags: tags.map(&:name) }

            expect(topic.reload.tags).to match_array(tags)
            expect(response.status).to eq(200)
            expect(topic.reload.bumped_at).to eq_time(last_bumped_at)
          end

          it "bumps the topic if the setting is disabled" do
            SiteSetting.disable_tags_edit_notifications = false
            last_bumped_at = topic.bumped_at
            expect(last_bumped_at).not_to be_nil

            put "/t/#{topic.slug}/#{topic.id}.json", params: { tags: tags.map(&:name) }

            expect(topic.reload.tags).to match_array(tags)
            expect(response.status).to eq(200)
            expect(topic.reload.bumped_at).not_to eq_time(last_bumped_at)
          end
        end

        describe "when first post is locked" do
          it "blocks non-staff from editing even if 'trusted_users_can_edit_others' is true" do
            SiteSetting.trusted_users_can_edit_others = true
            user.update!(trust_level: 3)
            topic.first_post.update!(locked_by_id: admin.id)

            put "/t/#{topic.slug}/#{topic.id}.json", params: { title: topic.title + " hello" }

            expect(response.status).to eq(403)
          end

          it "allows staff to edit" do
            sign_in(Fabricate(:admin))
            topic.first_post.update!(locked_by_id: admin.id)

            put "/t/#{topic.slug}/#{topic.id}.json", params: { title: topic.title + " hello" }
            expect(response.status).to eq(200)
          end
        end

        context "with tags" do
          before { SiteSetting.tagging_enabled = true }

          it "can add a tag to topic" do
            expect do
              put "/t/#{topic.slug}/#{topic.id}.json", params: { tags: [tag.name] }
            end.to change { topic.reload.first_post.revisions.count }.by(1)

            expect(response.status).to eq(200)
            expect(topic.tags.pluck(:id)).to contain_exactly(tag.id)
          end

          it "can create a tag" do
            SiteSetting.min_trust_to_create_tag = 0
            expect do
              put "/t/#{topic.slug}/#{topic.id}.json", params: { tags: ["newtag"] }
            end.to change { topic.reload.first_post.revisions.count }.by(1)

            expect(response.status).to eq(200)
            expect(topic.reload.tags.pluck(:name)).to contain_exactly("newtag")
          end

          it "can change the category and create a new tag" do
            SiteSetting.min_trust_to_create_tag = 0
            expect do
              put "/t/#{topic.slug}/#{topic.id}.json",
                  params: {
                    tags: ["newtag"],
                    category_id: category.id,
                  }
            end.to change { topic.reload.first_post.revisions.count }.by(1)

            expect(response.status).to eq(200)
            expect(topic.reload.tags.pluck(:name)).to contain_exactly("newtag")
          end

          it "can add a tag to wiki topic" do
            SiteSetting.min_trust_to_edit_wiki_post = 2
            topic.first_post.update!(wiki: true)
            sign_in(user_2)

            expect do
              put "/t/#{topic.id}/tags.json", params: { tags: [tag.name] }
            end.not_to change { topic.reload.first_post.revisions.count }

            expect(response.status).to eq(403)
            user_2.update!(trust_level: 2)

            expect do put "/t/#{topic.id}/tags.json", params: { tags: [tag.name] } end.to change {
              topic.reload.first_post.revisions.count
            }.by(1)

            expect(response.status).to eq(200)
            expect(topic.tags.pluck(:id)).to contain_exactly(tag.id)
          end

          it "does not remove tag if no params is given" do
            topic.tags << tag

            expect do put "/t/#{topic.slug}/#{topic.id}.json" end.to_not change {
              topic.reload.tags.count
            }

            expect(response.status).to eq(200)
          end

          it "can remove a tag" do
            topic.tags << tag

            expect do
              put "/t/#{topic.slug}/#{topic.id}.json", params: { tags: [""] }
            end.to change { topic.reload.first_post.revisions.count }.by(1)

            expect(response.status).to eq(200)
            expect(topic.tags).to eq([])
          end

          it "does not cause a revision when tags have not changed" do
            topic.tags << tag

            expect do
              put "/t/#{topic.slug}/#{topic.id}.json", params: { tags: [tag.name] }
            end.not_to change { topic.reload.first_post.revisions.count }

            expect(response.status).to eq(200)
          end
        end

        context "when topic is private" do
          before do
            topic.update!(
              archetype: Archetype.private_message,
              category: nil,
              allowed_users: [topic.user],
            )
          end

          context "when there are no changes" do
            it "does not call the PostRevisor" do
              expect do
                put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: topic.category_id }
              end.not_to change(PostRevision.all, :count)

              expect(response.status).to eq(200)
            end
          end
        end

        context "when updating to a category with restricted tags" do
          fab!(:restricted_category) { Fabricate(:category) }
          fab!(:tag1) { Fabricate(:tag) }
          fab!(:tag2) { Fabricate(:tag) }
          fab!(:tag3) { Fabricate(:tag) }
          fab!(:tag_group_1) { Fabricate(:tag_group, tag_names: [tag1.name]) }
          fab!(:tag_group_2) { Fabricate(:tag_group) }

          before_all do
            SiteSetting.tagging_enabled = true
            topic.update!(tags: [tag1])
          end

          it "can’t change to a category disallowing this topic current tags" do
            restricted_category.allowed_tags = [tag2.name]

            put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: restricted_category.id }

            result = response.parsed_body

            expect(response.status).to eq(422)
            expect(result["errors"]).to be_present
            expect(topic.reload.category_id).not_to eq(restricted_category.id)
          end

          it "can’t change to a category disallowing this topic current tag (through tag_group)" do
            tag_group_2.tags = [tag2]
            restricted_category.allowed_tag_groups = [tag_group_2.name]

            put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: restricted_category.id }

            result = response.parsed_body

            expect(response.status).to eq(422)
            expect(result["errors"]).to be_present
            expect(topic.reload.category_id).not_to eq(restricted_category.id)
          end

          it "can change to a category allowing this topic current tags" do
            restricted_category.allowed_tags = [tag1.name]

            put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: restricted_category.id }

            expect(response.status).to eq(200)
          end

          it "can change to a category allowing this topic current tags (through tag_group)" do
            tag_group_1.tags = [tag1]
            restricted_category.allowed_tag_groups = [tag_group_1.name]

            put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: restricted_category.id }

            expect(response.status).to eq(200)
          end

          it "can change to a category allowing any tag" do
            put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: category.id }

            expect(response.status).to eq(200)
          end

          it "can’t add a category-only tags from another category to a category" do
            restricted_category.allowed_tags = [tag2.name]

            put "/t/#{topic.slug}/#{topic.id}.json",
                params: {
                  tags: [tag2.name],
                  category_id: category.id,
                }

            result = response.parsed_body
            expect(response.status).to eq(422)
            expect(result["errors"]).to be_present
            expect(result["errors"][0]).to include(tag2.name)
            expect(topic.reload.category_id).not_to eq(restricted_category.id)
          end

          it "allows category change when topic has a hidden tag" do
            Fabricate(:tag_group, permissions: { "staff" => 1 }, tag_names: [tag1.name])

            put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: category.id }

            result = response.parsed_body
            expect(response.status).to eq(200)
            expect(topic.reload.tags).to include(tag1)
          end

          it "allows category change when topic has a read-only tag" do
            Fabricate(
              :tag_group,
              permissions: {
                "staff" => 1,
                "everyone" => 3,
              },
              tag_names: [tag3.name],
            )
            topic.update!(tags: [tag3])

            put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: category.id }

            result = response.parsed_body
            expect(response.status).to eq(200)
            expect(topic.reload.tags).to contain_exactly(tag3)
          end

          it "does not leak tag name when trying to use a staff tag" do
            Fabricate(:tag_group, permissions: { "staff" => 1 }, tag_names: [tag3.name])

            put "/t/#{topic.slug}/#{topic.id}.json",
                params: {
                  tags: [tag3.name],
                  category_id: category.id,
                }

            result = response.parsed_body
            expect(response.status).to eq(422)
            expect(result["errors"]).to be_present
            expect(result["errors"][0]).not_to include(tag3.name)
          end

          it "will clean tag params" do
            restricted_category.allowed_tags = [tag2.name]

            put "/t/#{topic.slug}/#{topic.id}.json",
                params: {
                  tags: [""],
                  category_id: restricted_category.id,
                }

            result = response.parsed_body
            expect(response.status).to eq(200)
          end
        end

        context "when allow_uncategorized_topics is false" do
          before { SiteSetting.allow_uncategorized_topics = false }

          it "can add a category to an uncategorized topic" do
            put "/t/#{topic.slug}/#{topic.id}.json", params: { category_id: category.id }

            expect(response.status).to eq(200)
            expect(topic.reload.category).to eq(category)
          end
        end
      end
    end

    describe "featured links" do
      def fabricate_topic(user, category = nil)
        topic = Fabricate(:topic, user: user, category: category)
        Fabricate(:post, user: post_author1, topic: topic)
        topic
      end

      it "allows to update topic featured link" do
        sign_in(trust_level_1)

        tl1_topic = fabricate_topic(trust_level_1)
        put "/t/#{tl1_topic.slug}/#{tl1_topic.id}.json",
            params: {
              featured_link: "https://discourse.org",
            }

        expect(response.status).to eq(200)
      end

      it "doesn't allow TL0 users to update topic featured link" do
        sign_in(trust_level_0)

        tl0_topic = fabricate_topic(trust_level_0)
        put "/t/#{tl0_topic.slug}/#{tl0_topic.id}.json",
            params: {
              featured_link: "https://discourse.org",
            }

        expect(response.status).to eq(422)
      end

      it "doesn't allow to update topic featured link if featured links are disabled in settings" do
        sign_in(trust_level_1)

        SiteSetting.topic_featured_link_enabled = false
        tl1_topic = fabricate_topic(trust_level_1)
        put "/t/#{tl1_topic.slug}/#{tl1_topic.id}.json",
            params: {
              featured_link: "https://discourse.org",
            }

        expect(response.status).to eq(422)
      end

      it "doesn't allow to update topic featured link in the category with forbidden feature links" do
        sign_in(trust_level_1)

        category = Fabricate(:category, topic_featured_link_allowed: false)
        tl1_topic_in_category = fabricate_topic(trust_level_1, category)
        put "/t/#{tl1_topic_in_category.slug}/#{tl1_topic_in_category.id}.json",
            params: {
              featured_link: "https://discourse.org",
            }

        expect(response.status).to eq(422)
      end
    end
  end

  describe "#show_by_external_id" do
    fab!(:private_topic) { Fabricate(:private_message_topic, external_id: "private") }
    fab!(:topic) { Fabricate(:topic, external_id: "asdf") }

    it "returns 301 when found" do
      get "/t/external_id/asdf.json"
      expect(response.status).to eq(301)
      expect(response).to redirect_to(topic.relative_url + ".json")
    end

    it "returns right response when not found" do
      get "/t/external_id/fdsa.json"
      expect(response.status).to eq(404)
    end

    it "preserves only select query params" do
      get "/t/external_id/asdf.json", params: { filter_top_level_replies: true }
      expect(response.status).to eq(301)
      expect(response).to redirect_to(topic.relative_url + ".json?filter_top_level_replies=true")

      get "/t/external_id/asdf.json", params: { not_valid: true }
      expect(response.status).to eq(301)
      expect(response).to redirect_to(topic.relative_url + ".json")

      get "/t/external_id/asdf.json", params: { filter_top_level_replies: true, post_number: 9999 }
      expect(response.status).to eq(301)
      expect(response).to redirect_to(
        topic.relative_url + "/9999.json?filter_top_level_replies=true",
      )

      get "/t/external_id/asdf.json", params: { filter_top_level_replies: true, print: true }
      expect(response.status).to eq(301)
      expect(response).to redirect_to(
        topic.relative_url + ".json?print=true&filter_top_level_replies=true",
      )
    end

    describe "when user does not have access to the topic" do
      it "should return the right response" do
        sign_in(user)

        get "/t/external_id/private.json"

        expect(response.status).to eq(403)
        expect(response.body).to include(I18n.t("invalid_access"))
      end
    end
  end

  describe "#show" do
    use_redis_snapshotting

    fab!(:private_topic) { pm }
    fab!(:topic) { Fabricate(:post, user: post_author1).topic }

    fab!(:p1) { Fabricate(:post, user: topic.user) }
    fab!(:p2) { Fabricate(:post, user: topic.user) }

    describe "when topic is not allowed" do
      it "should return the right response" do
        SiteSetting.detailed_404 = true
        sign_in(user)

        get "/t/#{private_topic.id}.json"

        expect(response.status).to eq(403)
        expect(response.body).to include(I18n.t("invalid_access"))
      end
    end

    describe "when topic is allowed to a group" do
      fab!(:group) { Fabricate(:group, public_admission: true) }
      fab!(:category) do
        Fabricate(:category_with_definition).tap do |category|
          category.set_permissions(group => :full)
          category.save!
        end
      end
      fab!(:topic) { Fabricate(:topic, category: category) }

      before { SiteSetting.detailed_404 = true }

      it "shows a descriptive error message containing the group name" do
        get "/t/#{topic.id}.json"

        html = CGI.unescapeHTML(response.parsed_body["extras"]["html"])
        expect(response.status).to eq(403)
        expect(html).to include(I18n.t("not_in_group.title_topic", group: group.name))
        expect(html).to include(I18n.t("not_in_group.join_group"))
      end
    end

    it "correctly renders canonicals" do
      get "/t/#{topic.id}", params: { slug: topic.slug }

      expect(response.status).to eq(200)
      expect(css_select("link[rel=canonical]").length).to eq(1)
      expect(response.headers["Cache-Control"]).to eq("no-cache, no-store")
    end

    it "returns 301 even if slug does not match URL" do
      # in the past we had special logic for unlisted topics
      # we would require slug unless you made a json call
      # this was not really providing any security
      #
      # we no longer require a topic be visible to perform url correction
      # if you need to properly hide a topic for users use a secure category
      # or a PM
      Fabricate(:post, user: post_author1, topic: invisible_topic)

      get "/t/#{invisible_topic.id}.json", params: { slug: invisible_topic.slug }
      expect(response.status).to eq(200)

      get "/t/#{topic.id}.json", params: { slug: "just-guessing" }
      expect(response.status).to eq(301)

      get "/t/#{topic.slug}.json"
      expect(response.status).to eq(301)
    end

    it "shows a topic correctly" do
      get "/t/#{topic.slug}/#{topic.id}.json"
      expect(response.status).to eq(200)
    end

    it "return 404 for an invalid page" do
      get "/t/#{topic.slug}/#{topic.id}.json", params: { page: 2 }
      expect(response.status).to eq(404)
    end

    it "can find a topic given a slug in the id param" do
      get "/t/#{topic.slug}"
      expect(response).to redirect_to(topic.relative_url)
    end

    it "can find a topic when a slug has a number in front" do
      another_topic = Fabricate(:post, user: post_author1).topic

      topic.update_column(:slug, "#{another_topic.id}-reasons-discourse-is-awesome")
      get "/t/#{another_topic.id}-reasons-discourse-is-awesome"

      expect(response).to redirect_to(topic.relative_url)
    end

    it "keeps the post_number parameter around when redirecting" do
      get "/t/#{topic.slug}", params: { post_number: 42 }
      expect(response).to redirect_to(topic.relative_url + "/42")
    end

    it "keeps the page around when redirecting" do
      get "/t/#{topic.slug}", params: { post_number: 42, page: 123 }

      expect(response).to redirect_to(topic.relative_url + "/42?page=123")
    end

    it "does not accept page params as an array" do
      get "/t/#{topic.slug}", params: { post_number: 42, page: [2] }

      expect(response).to redirect_to("#{topic.relative_url}/42?page=1")
    end

    it "returns 404 when an invalid slug is given and no id" do
      get "/t/nope-nope.json"

      expect(response.status).to eq(404)
    end

    it "returns a 404 when slug and topic id do not match a topic" do
      get "/t/made-up-topic-slug/123456.json"
      expect(response.status).to eq(404)
    end

    it "returns a 404 for an ID that is larger than postgres limits" do
      get "/t/made-up-topic-slug/5014217323220164041.json"

      expect(response.status).to eq(404)
    end

    it "doesn't use print mode when print equals false" do
      SiteSetting.max_prints_per_hour_per_user = 0

      get "/t/#{topic.slug}/#{topic.id}.json?print=false"
      expect(response.status).to eq(200)
    end

    it "does not result in N+1 queries problem when multiple topic participants have primary or flair group configured" do
      user2 = Fabricate(:user)
      user3 = Fabricate(:user)
      post2 = Fabricate(:post, topic: topic, user: user2)
      post3 = Fabricate(:post, topic: topic, user: user3)
      group = Fabricate(:group)
      user2.update!(primary_group: group)
      user3.update!(flair_group: group)

      # warm up
      get "/t/#{topic.id}.json"
      expect(response.status).to eq(200)

      first_request_queries =
        track_sql_queries do
          get "/t/#{topic.id}.json"

          expect(response.status).to eq(200)

          expect(
            response.parsed_body["details"]["participants"].map { |u| u["id"] },
          ).to contain_exactly(post_author1.id, user2.id, user3.id)
        end

      group2 = Fabricate(:group)
      user4 = Fabricate(:user, flair_group: group2)
      user5 = Fabricate(:user, primary_group: group2)
      post4 = Fabricate(:post, topic: topic, user: user4)
      post5 = Fabricate(:post, topic: topic, user: user5)

      second_request_queries =
        track_sql_queries do
          get "/t/#{topic.id}.json"

          expect(response.status).to eq(200)

          expect(
            response.parsed_body["details"]["participants"].map { |u| u["id"] },
          ).to contain_exactly(post_author1.id, user2.id, user3.id, user4.id, user5.id)
        end

      expect(second_request_queries.count).to eq(first_request_queries.count)
    end

    context "when a topic with nil slug exists" do
      before do
        nil_slug_topic = Fabricate(:topic)
        Topic.connection.execute("update topics set slug=null where id = #{nil_slug_topic.id}") # can't find a way to set slug column to null using the model
      end

      it "returns a 404 when slug and topic id do not match a topic" do
        get "/t/made-up-topic-slug/123123.json"
        expect(response.status).to eq(404)
      end
    end

    context "with permission errors" do
      fab!(:allowed_user) { Fabricate(:user) }
      fab!(:allowed_group) { Fabricate(:group) }
      fab!(:accessible_group) { Fabricate(:group, public_admission: true) }
      fab!(:secure_category) do
        c = Fabricate(:category)
        c.permissions = [[allowed_group, :full]]
        c.save
        allowed_user.groups = [allowed_group]
        allowed_user.save
        c
      end
      fab!(:accessible_category) do
        Fabricate(:category).tap do |c|
          c.set_permissions(accessible_group => :full)
          c.save!
        end
      end
      fab!(:normal_topic) { Fabricate(:topic) }
      fab!(:secure_topic) { Fabricate(:topic, category: secure_category) }
      fab!(:private_topic) { Fabricate(:private_message_topic, user: allowed_user) }

      # Can't use fab!, because deleted_topics can't be re-found
      before_all do
        @deleted_topic = Fabricate(:deleted_topic)
        @deleted_secure_topic = Fabricate(:topic, category: secure_category, deleted_at: 1.day.ago)
        @deleted_private_topic =
          Fabricate(:private_message_topic, user: allowed_user, deleted_at: 1.day.ago)
      end
      let(:deleted_topic) { @deleted_topic }
      let(:deleted_secure_topic) { @deleted_secure_topic }
      let(:deleted_private_topic) { @deleted_private_topic }

      let!(:nonexistent_topic_id) { Topic.last.id + 10_000 }
      fab!(:secure_accessible_topic) { Fabricate(:topic, category: accessible_category) }

      shared_examples "various scenarios" do |expected, request_json:|
        expected.each do |key, value|
          it "returns #{value} for #{key}" do
            slug = key == :nonexistent ? "garbage-slug" : send(key.to_s).slug
            topic_id = key == :nonexistent ? nonexistent_topic_id : send(key.to_s).id
            format = request_json ? ".json" : ""
            get "/t/#{slug}/#{topic_id}#{format}"
            expect(response.status).to eq(value)
          end
        end

        expected_slug_response = expected[:secure_topic] == 200 ? 301 : expected[:secure_topic]
        it "will return a #{expected_slug_response} when requesting a secure topic by slug" do
          format = request_json ? ".json" : ""
          get "/t/#{secure_topic.slug}#{format}"
          expect(response.status).to eq(expected_slug_response)
        end
      end

      context "without detailed error pages" do
        before { SiteSetting.detailed_404 = false }

        context "when anonymous" do
          expected = {
            normal_topic: 200,
            secure_topic: 404,
            private_topic: 404,
            deleted_topic: 404,
            deleted_secure_topic: 404,
            deleted_private_topic: 404,
            nonexistent: 404,
            secure_accessible_topic: 404,
          }
          include_examples "various scenarios", expected, request_json: false
        end

        context "when anonymous with login required" do
          before { SiteSetting.login_required = true }
          expected = {
            normal_topic: 302,
            secure_topic: 302,
            private_topic: 302,
            deleted_topic: 302,
            deleted_secure_topic: 302,
            deleted_private_topic: 302,
            nonexistent: 302,
            secure_accessible_topic: 302,
          }
          include_examples "various scenarios", expected, request_json: false
        end

        context "when anonymous with login required, requesting json" do
          before { SiteSetting.login_required = true }
          expected = {
            normal_topic: 403,
            secure_topic: 403,
            private_topic: 403,
            deleted_topic: 403,
            deleted_secure_topic: 403,
            deleted_private_topic: 403,
            nonexistent: 403,
            secure_accessible_topic: 403,
          }
          include_examples "various scenarios", expected, request_json: true
        end

        context "when normal user" do
          before { sign_in(user) }

          expected = {
            normal_topic: 200,
            secure_topic: 404,
            private_topic: 404,
            deleted_topic: 404,
            deleted_secure_topic: 404,
            deleted_private_topic: 404,
            nonexistent: 404,
            secure_accessible_topic: 404,
          }
          include_examples "various scenarios", expected, request_json: false
        end

        context "when allowed user" do
          before { sign_in(allowed_user) }

          expected = {
            normal_topic: 200,
            secure_topic: 200,
            private_topic: 200,
            deleted_topic: 404,
            deleted_secure_topic: 404,
            deleted_private_topic: 404,
            nonexistent: 404,
            secure_accessible_topic: 404,
          }
          include_examples "various scenarios", expected, request_json: false
        end

        context "when moderator" do
          before { sign_in(moderator) }

          expected = {
            normal_topic: 200,
            secure_topic: 404,
            private_topic: 404,
            deleted_topic: 200,
            deleted_secure_topic: 404,
            deleted_private_topic: 404,
            nonexistent: 404,
            secure_accessible_topic: 404,
          }
          include_examples "various scenarios", expected, request_json: false
        end

        context "when admin" do
          before { sign_in(admin) }

          expected = {
            normal_topic: 200,
            secure_topic: 200,
            private_topic: 200,
            deleted_topic: 200,
            deleted_secure_topic: 200,
            deleted_private_topic: 200,
            nonexistent: 404,
            secure_accessible_topic: 200,
          }
          include_examples "various scenarios", expected, request_json: false
        end
      end

      context "with detailed error pages" do
        before { SiteSetting.detailed_404 = true }

        context "when anonymous" do
          expected = {
            normal_topic: 200,
            secure_topic: 403,
            private_topic: 403,
            deleted_topic: 410,
            deleted_secure_topic: 403,
            deleted_private_topic: 403,
            nonexistent: 404,
            secure_accessible_topic: 403,
          }
          include_examples "various scenarios", expected, request_json: true
        end

        context "when anonymous with login required" do
          before { SiteSetting.login_required = true }
          expected = {
            normal_topic: 302,
            secure_topic: 302,
            private_topic: 302,
            deleted_topic: 302,
            deleted_secure_topic: 302,
            deleted_private_topic: 302,
            nonexistent: 302,
            secure_accessible_topic: 302,
          }
          include_examples "various scenarios", expected, request_json: false
        end

        context "when normal user" do
          before { sign_in(user) }

          expected = {
            normal_topic: 200,
            secure_topic: 403,
            private_topic: 403,
            deleted_topic: 410,
            deleted_secure_topic: 403,
            deleted_private_topic: 403,
            nonexistent: 404,
            secure_accessible_topic: 403,
          }
          include_examples "various scenarios", expected, request_json: true
        end

        context "when allowed user" do
          before { sign_in(allowed_user) }

          expected = {
            normal_topic: 200,
            secure_topic: 200,
            private_topic: 200,
            deleted_topic: 410,
            deleted_secure_topic: 410,
            deleted_private_topic: 410,
            nonexistent: 404,
            secure_accessible_topic: 403,
          }
          include_examples "various scenarios", expected, request_json: false
        end

        context "when moderator" do
          before { sign_in(moderator) }

          expected = {
            normal_topic: 200,
            secure_topic: 403,
            private_topic: 403,
            deleted_topic: 200,
            deleted_secure_topic: 403,
            deleted_private_topic: 403,
            nonexistent: 404,
            secure_accessible_topic: 403,
          }
          include_examples "various scenarios", expected, request_json: false
        end

        context "when admin" do
          before { sign_in(admin) }

          expected = {
            normal_topic: 200,
            secure_topic: 200,
            private_topic: 200,
            deleted_topic: 200,
            deleted_secure_topic: 200,
            deleted_private_topic: 200,
            nonexistent: 404,
            secure_accessible_topic: 200,
          }
          include_examples "various scenarios", expected, request_json: false
        end
      end
    end

    it "records a view" do
      expect do get "/t/#{topic.slug}/#{topic.id}.json" end.to change(TopicViewItem, :count).by(1)
    end

    it "records a view to invalid post_number" do
      expect do
        get "/t/#{topic.slug}/#{topic.id}/#{256**4}", params: { u: user.username }
        expect(response.status).to eq(200)
      end.to change { IncomingLink.count }.by(1)
    end

    it "records incoming links" do
      expect do get "/t/#{topic.slug}/#{topic.id}", params: { u: user.username } end.to change {
        IncomingLink.count
      }.by(1)
    end

    context "with print" do
      it "doesn't renders the print view when disabled" do
        SiteSetting.max_prints_per_hour_per_user = 0

        get "/t/#{topic.slug}/#{topic.id}/print"

        expect(response).to be_forbidden
      end

      it "renders the print view when enabled" do
        SiteSetting.max_prints_per_hour_per_user = 10
        get "/t/#{topic.slug}/#{topic.id}/print", headers: { HTTP_USER_AGENT: "Rails Testing" }

        expect(response.status).to eq(200)
        body = response.body

        expect(body).to have_tag(:body, class: "crawler")
        expect(body).to_not have_tag(:meta, with: { name: "fragment" })
      end

      it "uses the application layout when there's no param" do
        SiteSetting.max_prints_per_hour_per_user = 10
        get "/t/#{topic.slug}/#{topic.id}", headers: { HTTP_USER_AGENT: "Rails Testing" }

        body = response.body

        expect(body).to have_tag(:script, src: "/assets/discourse.js")
        expect(body).to have_tag(:meta, with: { name: "fragment" })
      end
    end

    it "records redirects" do
      get "/t/#{topic.id}", headers: { HTTP_REFERER: "http://twitter.com" }
      get "/t/#{topic.slug}/#{topic.id}", headers: { HTTP_REFERER: nil }

      link = IncomingLink.first
      expect(link.referer).to eq("http://twitter.com")
    end

    it "tracks a visit for all html requests" do
      sign_in(user)
      get "/t/#{topic.slug}/#{topic.id}"
      topic_user = TopicUser.where(user: user, topic: topic).first
      expect(topic_user.last_visited_at).to eq_time(topic_user.first_visited_at)
    end

    context "when considering for a promotion" do
      before do
        SiteSetting.tl1_requires_topics_entered = 0
        SiteSetting.tl1_requires_read_posts = 0
        SiteSetting.tl1_requires_time_spent_mins = 0
        SiteSetting.tl1_requires_time_spent_mins = 0
      end

      it "reviews the user for a promotion if they're new" do
        sign_in(user)
        user.update_column(:trust_level, TrustLevel[0])
        get "/t/#{topic.slug}/#{topic.id}.json"
        user.reload
        expect(user.trust_level).to eq(1)
      end
    end

    context "with filters" do
      def extract_post_stream
        json = response.parsed_body
        json["post_stream"]["posts"].map { |post| post["id"] }
      end

      before do
        TopicView.stubs(:chunk_size).returns(2)
        @post_ids = topic.posts.pluck(:id)
        3.times { @post_ids << Fabricate(:post, user: post_author1, topic: topic).id }
      end

      it "grabs the correct set of posts" do
        get "/t/#{topic.slug}/#{topic.id}.json"
        expect(response.status).to eq(200)
        expect(extract_post_stream).to eq(@post_ids[0..1])

        get "/t/#{topic.slug}/#{topic.id}.json", params: { page: 1 }
        expect(response.status).to eq(200)
        expect(extract_post_stream).to eq(@post_ids[0..1])

        get "/t/#{topic.slug}/#{topic.id}.json", params: { page: 2 }
        expect(response.status).to eq(200)
        expect(extract_post_stream).to eq(@post_ids[2..3])

        post_number = topic.posts.pluck(:post_number).sort[3]
        get "/t/#{topic.slug}/#{topic.id}/#{post_number}.json"
        expect(response.status).to eq(200)
        expect(extract_post_stream).to eq(@post_ids[-2..-1])

        TopicView.stubs(:chunk_size).returns(3)

        get "/t/#{topic.slug}/#{topic.id}.json", params: { page: 1 }
        expect(response.status).to eq(200)
        expect(extract_post_stream).to eq(@post_ids[0..2])

        get "/t/#{topic.slug}/#{topic.id}.json", params: { page: 2 }
        expect(response.status).to eq(200)
        expect(extract_post_stream).to eq(@post_ids[3..3])

        get "/t/#{topic.slug}/#{topic.id}.json", params: { page: 3 }
        expect(response.status).to eq(404)

        TopicView.stubs(:chunk_size).returns(4)

        get "/t/#{topic.slug}/#{topic.id}.json", params: { page: 1 }
        expect(response.status).to eq(200)
        expect(extract_post_stream).to eq(@post_ids[0..3])

        get "/t/#{topic.slug}/#{topic.id}.json", params: { page: 2 }
        expect(response.status).to eq(404)
      end
    end

    describe "#show filters" do
      fab!(:post) { Fabricate(:post, user: post_author1) }
      fab!(:topic) { post.topic }
      fab!(:post2) { Fabricate(:post, user: post_author2, topic: topic) }

      describe "filter by replies to a post" do
        fab!(:post3) do
          Fabricate(
            :post,
            user: post_author3,
            topic: topic,
            reply_to_post_number: post2.post_number,
          )
        end
        fab!(:post4) do
          Fabricate(
            :post,
            user: post_author4,
            topic: topic,
            reply_to_post_number: post2.post_number,
          )
        end
        fab!(:post5) { Fabricate(:post, user: post_author5, topic: topic) }
        fab!(:quote_reply) { Fabricate(:basic_reply, user: user, topic: topic) }
        fab!(:post_reply) { PostReply.create(post_id: post2.id, reply_post_id: quote_reply.id) }

        it "should return the right posts" do
          get "/t/#{topic.id}.json", params: { replies_to_post_number: post2.post_number }

          expect(response.status).to eq(200)

          body = response.parsed_body

          expect(body.has_key?("suggested_topics")).to eq(false)
          expect(body.has_key?("related_messages")).to eq(false)

          ids = body["post_stream"]["posts"].map { |p| p["id"] }
          expect(ids).to eq([post.id, post2.id, post3.id, post4.id, quote_reply.id])
        end
      end

      describe "filter by top level replies" do
        fab!(:post3) do
          Fabricate(
            :post,
            user: post_author3,
            topic: topic,
            reply_to_post_number: post2.post_number,
          )
        end
        fab!(:post4) do
          Fabricate(
            :post,
            user: post_author4,
            topic: topic,
            reply_to_post_number: post2.post_number,
          )
        end
        fab!(:post5) { Fabricate(:post, user: post_author5, topic: topic) }
        fab!(:post6) do
          Fabricate(
            :post,
            user: post_author4,
            topic: topic,
            reply_to_post_number: post5.post_number,
          )
        end

        it "should return the right posts" do
          get "/t/#{topic.id}.json", params: { filter_top_level_replies: true }

          expect(response.status).to eq(200)

          body = response.parsed_body

          expect(body.has_key?("suggested_topics")).to eq(false)
          expect(body.has_key?("related_messages")).to eq(false)

          ids = body["post_stream"]["posts"].map { |p| p["id"] }
          expect(ids).to eq([post2.id, post5.id])
        end
      end

      describe "filter upwards by post id" do
        fab!(:post3) { Fabricate(:post, user: post_author3, topic: topic) }
        fab!(:post4) do
          Fabricate(
            :post,
            user: post_author4,
            topic: topic,
            reply_to_post_number: post3.post_number,
          )
        end
        fab!(:post5) do
          Fabricate(
            :post,
            user: post_author5,
            topic: topic,
            reply_to_post_number: post4.post_number,
          )
        end
        fab!(:post6) { Fabricate(:post, user: post_author6, topic: topic) }

        it "should return the right posts" do
          get "/t/#{topic.id}.json", params: { filter_upwards_post_id: post5.id }

          expect(response.status).to eq(200)

          body = response.parsed_body

          expect(body.has_key?("suggested_topics")).to eq(false)
          expect(body.has_key?("related_messages")).to eq(false)

          ids = body["post_stream"]["posts"].map { |p| p["id"] }
          # includes topic OP, current post and subsequent posts
          # but only one level of parents, respecting default max_reply_history = 1
          expect(ids).to eq([post.id, post4.id, post5.id, post6.id])
        end

        it "should respect max_reply_history site setting" do
          SiteSetting.max_reply_history = 2

          get "/t/#{topic.id}.json", params: { filter_upwards_post_id: post5.id }

          expect(response.status).to eq(200)

          body = response.parsed_body
          ids = body["post_stream"]["posts"].map { |p| p["id"] }

          # includes 2 levels of replies (post3 and post4)
          expect(ids).to eq([post.id, post3.id, post4.id, post5.id, post6.id])
        end
      end
    end

    context "when 'login required' site setting has been enabled" do
      before { SiteSetting.login_required = true }

      context "when the user is logged in" do
        before { sign_in(user) }

        it "shows the topic" do
          get "/t/#{topic.slug}/#{topic.id}.json"
          expect(response.status).to eq(200)
        end
      end

      context "when the user is not logged in" do
        let(:api_key) { Fabricate(:api_key, user: topic.user) }

        it "redirects browsers to the login page" do
          get "/t/#{topic.slug}/#{topic.id}"
          expect(response).to redirect_to login_path
        end

        it "raises a 403 for json requests" do
          get "/t/#{topic.slug}/#{topic.id}.json"
          expect(response.status).to eq(403)
        end

        it "shows the topic if valid api key is provided" do
          get "/t/#{topic.slug}/#{topic.id}.json", headers: { "HTTP_API_KEY" => api_key.key }

          expect(response.status).to eq(200)
          topic.reload
          expect(topic.views).to eq(1)
        end

        it "returns 403 for an invalid key" do
          %i[json html].each do |format|
            get "/t/#{topic.slug}/#{topic.id}.#{format}", headers: { "HTTP_API_KEY" => "bad" }

            expect(response.code.to_i).to eq(403)
            expect(response.body).to include(I18n.t("invalid_access"))
          end
        end
      end
    end

    it "is included for unlisted topics" do
      get "/t/#{invisible_topic.slug}/#{invisible_topic.id}.json"

      expect(response.headers["X-Robots-Tag"]).to eq("noindex")
    end

    it "is not included for normal topics" do
      get "/t/#{topic.slug}/#{topic.id}.json"

      expect(response.headers["X-Robots-Tag"]).to eq(nil)
    end

    it "is included when allow_index_in_robots_txt is set to false" do
      SiteSetting.allow_index_in_robots_txt = false

      get "/t/#{topic.slug}/#{topic.id}.json"

      expect(response.headers["X-Robots-Tag"]).to eq("noindex, nofollow")
    end

    it "doesn't store an incoming link when there's no referer" do
      expect { get "/t/#{topic.id}.json" }.not_to change(IncomingLink, :count)
      expect(response.status).to eq(200)
    end

    it "doesn't raise an error on a very long link" do
      get "/t/#{topic.id}.json", headers: { HTTP_REFERER: "http://#{"a" * 2000}.com" }
      expect(response.status).to eq(200)
    end

    context "with mentions" do
      fab!(:post) { Fabricate(:post, user: post_author1) }
      fab!(:topic) { post.topic }
      fab!(:post2) do
        Fabricate(
          :post,
          user: post_author2,
          topic: topic,
          raw: "I am mentioning @#{post_author1.username}.",
        )
      end

      it "returns mentions" do
        get "/t/#{topic.slug}/#{topic.id}.json"

        expect(response.status).to eq(200)

        json = response.parsed_body
        expect(json["post_stream"]["posts"][1]["mentioned_users"].length).to be(1)

        mentioned_user = json["post_stream"]["posts"][1]["mentioned_users"][0]
        expect(mentioned_user["id"]).to be(post_author1.id)
        expect(mentioned_user["name"]).to eq(post_author1.name)
        expect(mentioned_user["username"]).to eq(post_author1.username)
      end

      it "doesn't return status on mentions by default" do
        post_author1.set_status!("off to dentist", "tooth")

        get "/t/#{topic.slug}/#{topic.id}.json"

        expect(response.status).to eq(200)

        json = response.parsed_body
        expect(json["post_stream"]["posts"][1]["mentioned_users"].length).to be(1)
        status = json["post_stream"]["posts"][1]["mentioned_users"][0]["status"]
        expect(status).to be_nil
      end

      it "returns mentions with status if user status is enabled" do
        SiteSetting.enable_user_status = true
        post_author1.set_status!("off to dentist", "tooth")

        get "/t/#{topic.slug}/#{topic.id}.json"

        expect(response.status).to eq(200)

        json = response.parsed_body
        expect(json["post_stream"]["posts"][1]["mentioned_users"].length).to be(1)

        status = json["post_stream"]["posts"][1]["mentioned_users"][0]["status"]
        expect(status).to be_present
        expect(status["emoji"]).to eq(post_author1.user_status.emoji)
        expect(status["description"]).to eq(post_author1.user_status.description)
      end

      it "returns an empty list of mentioned users if there is no mentions in a post" do
        Fabricate(:post, user: post_author2, topic: topic, raw: "Post without mentions.")

        get "/t/#{topic.slug}/#{topic.id}.json"

        expect(response.status).to eq(200)

        json = response.parsed_body
        expect(json["post_stream"]["posts"][2]["mentioned_users"].length).to be(0)
      end

      it "returns an empty list of mentioned users if an unexisting user was mentioned" do
        Fabricate(:post, user: post_author2, topic: topic, raw: "Mentioning an @unexisting_user.")

        get "/t/#{topic.slug}/#{topic.id}.json"

        expect(response.status).to eq(200)

        json = response.parsed_body
        expect(json["post_stream"]["posts"][2]["mentioned_users"].length).to be(0)
      end
    end

    describe "has_escaped_fragment?" do
      context "when the SiteSetting is disabled" do
        it "uses the application layout even with an escaped fragment param" do
          SiteSetting.enable_escaped_fragments = false

          get "/t/#{topic.slug}/#{topic.id}", params: { _escaped_fragment_: "true" }

          body = response.body

          expect(response.status).to eq(200)
          expect(body).to have_tag(:script, with: { src: "/assets/discourse.js" })
          expect(body).to_not have_tag(:meta, with: { name: "fragment" })
        end
      end

      context "when the SiteSetting is enabled" do
        before { SiteSetting.enable_escaped_fragments = true }

        it "uses the application layout when there's no param" do
          get "/t/#{topic.slug}/#{topic.id}"

          body = response.body

          expect(body).to have_tag(:script, with: { src: "/assets/discourse.js" })
          expect(body).to have_tag(:meta, with: { name: "fragment" })
        end

        it "uses the crawler layout when there's an _escaped_fragment_ param" do
          get "/t/#{topic.slug}/#{topic.id}",
              params: {
                _escaped_fragment_: true,
              },
              headers: {
                HTTP_USER_AGENT: "Rails Testing",
              }

          body = response.body

          expect(response.status).to eq(200)
          expect(body).to have_tag(:body, with: { class: "crawler" })
          expect(body).to_not have_tag(:meta, with: { name: "fragment" })
        end
      end
    end

    describe "clear_notifications" do
      it "correctly clears notifications if specified via cookie" do
        set_subfolder "/eviltrout"

        notification = Fabricate(:notification)
        sign_in(notification.user)

        cookies["cn"] = "2828,100,#{notification.id}"

        get "/t/#{topic.id}.json"

        expect(response.status).to eq(200)
        expect(response.cookies["cn"]).to eq(nil)
        expect(response.headers["Set-Cookie"]).to match(%r{^cn=;.*path=/eviltrout})

        notification.reload
        expect(notification.read).to eq(true)
      end

      it "correctly clears notifications if specified via header" do
        notification = Fabricate(:notification)
        sign_in(notification.user)

        get "/t/#{topic.id}.json",
            headers: {
              "Discourse-Clear-Notifications" => "2828,100,#{notification.id}",
            }

        expect(response.status).to eq(200)
        notification.reload
        expect(notification.read).to eq(true)
      end
    end

    describe "read only header" do
      it "returns no read only header by default" do
        get "/t/#{topic.id}.json"
        expect(response.status).to eq(200)
        expect(response.headers["Discourse-Readonly"]).to eq(nil)
      end

      it "returns a readonly header if the site is read only" do
        Discourse.received_postgres_readonly!
        get "/t/#{topic.id}.json"
        expect(response.status).to eq(200)
        expect(response.headers["Discourse-Readonly"]).to eq("true")
      end
    end

    describe "image only topic" do
      it "uses image alt tag for meta description" do
        post =
          Fabricate(
            :post,
            user: post_author1,
            raw: "![image_description|690x405](upload://sdtr5O5xaxf0iEOxICxL36YRj86.png)",
          )

        get post.topic.url

        body = response.body
        expect(body).to have_tag(
          :meta,
          with: {
            name: "description",
            content: "[image_description]",
          },
        )
      end

      it "uses image cdn url for schema markup" do
        set_cdn_url("http://cdn.localhost")
        post = Fabricate(:post_with_uploaded_image, user: post_author1)
        cpp = CookedPostProcessor.new(post).update_post_image

        get post.topic.url

        body = response.body
        expect(body).to have_tag(:link, with: { itemprop: "image", href: post.image_url })
      end
    end
  end

  describe "#post_ids" do
    fab!(:post) { Fabricate(:post, user: post_author1) }
    fab!(:topic) { post.topic }

    before { TopicView.stubs(:chunk_size).returns(1) }

    it "returns the right post ids" do
      post2 = Fabricate(:post, user: post_author2, topic: topic)
      post3 = Fabricate(:post, user: post_author3, topic: topic)

      get "/t/#{topic.id}/post_ids.json", params: { post_number: post.post_number }

      expect(response.status).to eq(200)

      body = response.parsed_body

      expect(body["post_ids"]).to eq([post2.id, post3.id])
    end

    describe "filtering by post number with filters" do
      describe "username filters" do
        fab!(:post) { Fabricate(:post, user: user) }
        fab!(:post2) { Fabricate(:post, topic: topic, user: user) }
        fab!(:post3) { Fabricate(:post, user: post_author3, topic: topic) }

        it "should return the right posts" do
          get "/t/#{topic.id}/post_ids.json",
              params: {
                post_number: post.post_number,
                username_filters: post2.user.username,
              }

          expect(response.status).to eq(200)

          body = response.parsed_body

          expect(body["post_ids"]).to eq([post2.id])
        end
      end

      describe "summary filter" do
        fab!(:post2) { Fabricate(:post, user: post_author2, topic: topic, percent_rank: 0.2) }
        fab!(:post3) { Fabricate(:post, user: post_author3, topic: topic) }

        it "should return the right posts" do
          get "/t/#{topic.id}/post_ids.json",
              params: {
                post_number: post.post_number,
                filter: "summary",
              }

          expect(response.status).to eq(200)

          body = response.parsed_body

          expect(body["post_ids"]).to eq([post2.id])
        end
      end

      describe "custom filters" do
        fab!(:post2) { Fabricate(:post, user: post_author2, topic: topic, percent_rank: 0.2) }
        fab!(:post3) { Fabricate(:post, user: post_author3, topic: topic, percent_rank: 0.5) }
        it "should return the right posts" do
          TopicView.add_custom_filter("percent") do |posts, topic_view|
            posts.where(percent_rank: 0.5)
          end

          get "/t/#{topic.id}.json", params: { post_number: post.post_number, filter: "percent" }

          expect(response.status).to eq(200)

          body = response.parsed_body

          expect(body["post_stream"]["posts"].map { |p| p["id"] }).to eq([post3.id])
        ensure
          TopicView.instance_variable_set(:@custom_filters, {})
        end
      end
    end
  end

  describe "#posts" do
    fab!(:post) { Fabricate(:post, user: post_author1) }
    fab!(:topic) { post.topic }

    after { Discourse.redis.flushdb }

    it "returns first post of the topic" do
      # we need one for suggested
      create_post

      get "/t/#{topic.id}/posts.json"

      expect(response.status).to eq(200)

      body = response.parsed_body

      expect(body["post_stream"]["posts"].first["id"]).to eq(post.id)

      expect(body["suggested_topics"]).to eq(nil)

      get "/t/#{topic.id}/posts.json?include_suggested=true"
      body = response.parsed_body

      expect(body["suggested_topics"]).not_to eq(nil)
    end

    describe "filtering by post number with filters" do
      describe "username filters" do
        fab!(:post2) { Fabricate(:post, user: post_author2, topic: topic) }
        fab!(:post3) { Fabricate(:post, user: post_author3, topic: topic) }

        it "should return the right posts" do
          TopicView.stubs(:chunk_size).returns(2)

          get "/t/#{topic.id}/posts.json",
              params: {
                post_number: post.post_number,
                username_filters: post2.user.username,
                asc: true,
              }

          expect(response.status).to eq(200)

          body = response.parsed_body

          expect(body["post_stream"]["posts"].first["id"]).to eq(post2.id)
        end
      end

      describe "summary filter" do
        fab!(:post2) { Fabricate(:post, user: post_author2, topic: topic, percent_rank: 0.2) }
        fab!(:post3) { Fabricate(:post, user: post_author3, topic: topic) }

        it "should return the right posts" do
          TopicView.stubs(:chunk_size).returns(2)

          get "/t/#{topic.id}/posts.json",
              params: {
                post_number: post.post_number,
                filter: "summary",
                asc: true,
              }

          expect(response.status).to eq(200)

          body = response.parsed_body

          expect(body["post_stream"]["posts"].first["id"]).to eq(post2.id)
        end
      end
    end
  end

  describe "#feed" do
    fab!(:topic) { Fabricate(:post, user: post_author1).topic }

    it "renders rss of the topic" do
      get "/t/foo/#{topic.id}.rss"
      expect(response.status).to eq(200)
      expect(response.media_type).to eq("application/rss+xml")

      # our RSS feed is full of post 1/2/3/4/5 links, we do not want it included
      # in the index, and do not want links followed
      # this allows us to remove it while allowing via robots.txt
      expect(response.headers["X-Robots-Tag"]).to eq("noindex, nofollow")
    end

    it "renders rss of the topic correctly with subfolder" do
      set_subfolder "/forum"
      get "/t/foo/#{topic.id}.rss"
      expect(response.status).to eq(200)
      expect(response.body).to_not include("/forum/forum")
      expect(response.body).to include("http://test.localhost/forum/t/#{topic.slug}")
    end

    it "returns 404 when posts are deleted" do
      topic.posts.each(&:trash!)
      get "/t/foo/#{topic.id}.rss"
      expect(response.status).to eq(404)
    end

    it "returns 404 when the topic is deleted" do
      topic.trash!
      get "/t/foo/#{topic.id}.rss"
      expect(response.status).to eq(404)
    end
  end

  describe "#invite_group" do
    let!(:admins) { Group[:admins] }

    before do
      sign_in(admin)
      admins.messageable_level = Group::ALIAS_LEVELS[:everyone]
      admins.save!
    end

    it "disallows inviting a group to a topic" do
      post "/t/#{topic.id}/invite-group.json", params: { group: "admins" }

      expect(response.status).to eq(422)
    end

    it "allows inviting a group to a PM" do
      post "/t/#{pm.id}/invite-group.json", params: { group: "admins" }

      expect(response.status).to eq(200)
      expect(pm.allowed_groups.first.id).to eq(admins.id)
    end
  end

  describe "#make_banner" do
    it "needs you to be a staff member" do
      tl4_topic = Fabricate(:topic, user: sign_in(trust_level_4))
      put "/t/#{tl4_topic.id}/make-banner.json"
      expect(response).to be_forbidden
    end

    describe "when logged in" do
      it "changes the topic archetype to 'banner'" do
        admin_topic = Fabricate(:topic, user: sign_in(admin))

        put "/t/#{admin_topic.id}/make-banner.json"
        expect(response.status).to eq(200)
        admin_topic.reload
        expect(admin_topic.archetype).to eq(Archetype.banner)
      end
    end
  end

  describe "#remove_banner" do
    it "needs you to be a staff member" do
      tl4_topic = Fabricate(:topic, user: sign_in(trust_level_4), archetype: Archetype.banner)
      put "/t/#{tl4_topic.id}/remove-banner.json"
      expect(response).to be_forbidden
    end

    describe "when logged in" do
      it "resets the topic archetype" do
        admin_topic = Fabricate(:topic, user: sign_in(admin), archetype: Archetype.banner)

        put "/t/#{admin_topic.id}/remove-banner.json"
        expect(response.status).to eq(200)
        admin_topic.reload
        expect(admin_topic.archetype).to eq(Archetype.default)
      end
    end
  end

  describe "#remove_allowed_user" do
    it "admin can be removed from a pm" do
      sign_in(admin)
      pm =
        create_post(
          user: user,
          archetype: "private_message",
          target_usernames: [user.username, admin.username],
        )

      put "/t/#{pm.topic_id}/remove-allowed-user.json", params: { username: admin.username }

      expect(response.status).to eq(200)
      expect(TopicAllowedUser.where(topic_id: pm.topic_id, user_id: admin.id).first).to eq(nil)
    end
  end

  describe "#bulk" do
    it "needs you to be logged in" do
      put "/topics/bulk.json"
      expect(response.status).to eq(403)
    end

    describe "when logged in" do
      before { sign_in(user) }
      let!(:operation) { { type: "change_category", category_id: "1" } }
      let!(:topic_ids) { [1, 2, 3] }

      it "requires a list of topic_ids or filter" do
        put "/topics/bulk.json", params: { operation: operation }
        expect(response.status).to eq(400)
      end

      it "requires an operation param" do
        put "/topics/bulk.json", params: { topic_ids: topic_ids }
        expect(response.status).to eq(400)
      end

      it "requires a type field for the operation param" do
        put "/topics/bulk.json", params: { topic_ids: topic_ids, operation: {} }
        expect(response.status).to eq(400)
      end

      it "can mark sub-categories unread" do
        sub = Fabricate(:category, parent_category_id: category.id)

        topic.update!(category_id: sub.id)

        post1 = create_post(user: user, topic_id: topic.id)
        create_post(topic_id: topic.id)

        put "/topics/bulk.json",
            params: {
              category_id: category.id,
              include_subcategories: true,
              filter: "unread",
              operation: {
                type: "dismiss_posts",
              },
            }

        expect(response.status).to eq(200)
        expect(TopicUser.get(post1.topic, post1.user).last_read_post_number).to eq(2)
      end

      it "can mark tag topics unread" do
        TopicTag.create!(topic_id: topic.id, tag_id: tag.id)

        post1 = create_post(user: user, topic_id: topic.id)
        create_post(topic_id: topic.id)

        put "/topics/bulk.json",
            params: {
              tag_name: tag.name,
              filter: "unread",
              operation: {
                type: "dismiss_posts",
              },
            }

        expect(response.status).to eq(200)
        expect(TopicUser.get(post1.topic, post1.user).last_read_post_number).to eq(2)
      end

      context "with private message" do
        before_all { Group.refresh_automatic_groups! }

        fab!(:group) do
          Fabricate(:group, messageable_level: Group::ALIAS_LEVELS[:everyone]).tap do |g|
            g.add(user_2)
          end
        end

        fab!(:group_message) do
          create_post(
            user: user,
            target_group_names: [group.name],
            archetype: Archetype.private_message,
          ).topic
        end

        fab!(:private_message) do
          create_post(
            user: user,
            target_usernames: [user_2.username],
            archetype: Archetype.private_message,
          ).topic
        end

        fab!(:private_message_2) do
          create_post(
            user: user,
            target_usernames: [user_2.username],
            archetype: Archetype.private_message,
          ).topic
        end

        fab!(:group_pm_topic_user) do
          TopicUser
            .find_by(user: user_2, topic: group_message)
            .tap { |tu| tu.update!(last_read_post_number: 1) }
        end

        fab!(:regular_pm_topic_user) do
          TopicUser
            .find_by(user: user_2, topic: private_message)
            .tap { |tu| tu.update!(last_read_post_number: 1) }
        end

        fab!(:regular_pm_topic_user_2) do
          TopicUser
            .find_by(user: user_2, topic: private_message_2)
            .tap { |tu| tu.update!(last_read_post_number: 1) }
        end

        before_all do
          create_post(user: user, topic: group_message)
          create_post(user: user, topic: private_message)
          create_post(user: user, topic: private_message_2)
        end

        before { sign_in(user_2) }

        it "can dismiss all user and group private message topics" do
          expect do
            put "/topics/bulk.json",
                params: {
                  filter: "unread",
                  operation: {
                    type: "dismiss_posts",
                  },
                  private_message_inbox: "all",
                }

            expect(response.status).to eq(200)
          end.to change { group_pm_topic_user.reload.last_read_post_number }.from(1).to(
            2,
          ).and change { regular_pm_topic_user.reload.last_read_post_number }.from(1).to(2)
        end

        it "can dismiss all user unread private message topics" do
          stub_const(TopicQuery, "DEFAULT_PER_PAGE_COUNT", 1) do
            expect do
              put "/topics/bulk.json",
                  params: {
                    filter: "unread",
                    operation: {
                      type: "dismiss_posts",
                    },
                    private_message_inbox: "user",
                  }

              expect(response.status).to eq(200)
            end.to change { regular_pm_topic_user.reload.last_read_post_number }.from(1).to(
              2,
            ).and change { regular_pm_topic_user_2.reload.last_read_post_number }.from(1).to(2)

            expect(group_pm_topic_user.reload.last_read_post_number).to eq(1)
          end
        end

        it "returns the right response when trying to dismiss private messages of an invalid group" do
          put "/topics/bulk.json",
              params: {
                filter: "unread",
                operation: {
                  type: "dismiss_posts",
                },
                private_message_inbox: "group",
                group_name: "randomgroup",
              }

          expect(response.status).to eq(404)
        end

        it "returns the right response when trying to dismiss private messages of a restricted group" do
          sign_in(user)

          put "/topics/bulk.json",
              params: {
                filter: "unread",
                operation: {
                  type: "dismiss_posts",
                },
                private_message_inbox: "group",
                group_name: group.name,
              }

          expect(response.status).to eq(404)
        end

        it "can dismiss all group unread private message topics" do
          expect do
            put "/topics/bulk.json",
                params: {
                  filter: "unread",
                  operation: {
                    type: "dismiss_posts",
                  },
                  private_message_inbox: "group",
                  group_name: group.name,
                }

            expect(response.status).to eq(200)
          end.to change { group_pm_topic_user.reload.last_read_post_number }.from(1).to(2)

          expect(regular_pm_topic_user.reload.last_read_post_number).to eq(1)
        end
      end

      it "can find unread" do
        # mark all unread muted
        put "/topics/bulk.json",
            params: {
              filter: "unread",
              operation: {
                type: :change_notification_level,
                notification_level_id: 0,
              },
            }

        expect(response.status).to eq(200)
      end

      it "delegates work to `TopicsBulkAction`" do
        topics_bulk_action = mock
        TopicsBulkAction
          .expects(:new)
          .with(user, topic_ids, operation, group: nil)
          .returns(topics_bulk_action)
        topics_bulk_action.expects(:perform!)

        put "/topics/bulk.json", params: { topic_ids: topic_ids, operation: operation }
      end

      it "raises an error if topic_ids is provided and it is not an array" do
        put "/topics/bulk.json", params: { topic_ids: "1", operation: operation }
        expect(response.parsed_body["errors"].first).to match(
          /Expecting topic_ids to contain a list/,
        )
        put "/topics/bulk.json", params: { topic_ids: [1], operation: operation }
        expect(response.parsed_body["errors"]).to eq(nil)
      end

      it "respects the tracked parameter" do
        # untracked topic
        CategoryUser.set_notification_level_for_category(
          user,
          NotificationLevels.all[:regular],
          category.id,
        )
        create_post(user: user, topic_id: topic.id)
        topic.update!(category_id: category.id)
        create_post(topic_id: topic.id)

        # tracked topic
        CategoryUser.set_notification_level_for_category(
          user,
          NotificationLevels.all[:tracking],
          tracked_category.id,
        )
        tracked_topic = create_post(user: user).topic
        tracked_topic.update!(category_id: tracked_category.id)
        create_post(topic_id: tracked_topic.id)

        put "/topics/bulk.json",
            params: {
              filter: "unread",
              operation: {
                type: "dismiss_posts",
              },
              tracked: true,
            }

        expect(response.status).to eq(200)
        expect(TopicUser.get(topic, user).last_read_post_number).to eq(topic.posts.count - 1)
        expect(TopicUser.get(tracked_topic, user).last_read_post_number).to eq(
          tracked_topic.posts.count,
        )
      end
    end
  end

  describe "#remove_bookmarks" do
    it "should remove bookmarks properly from non first post" do
      sign_in(user)

      post = create_post
      post2 = create_post(topic_id: post.topic_id)
      Fabricate(:bookmark, user: user, bookmarkable: post)
      Fabricate(:bookmark, user: user, bookmarkable: post2)

      put "/t/#{post.topic_id}/remove_bookmarks.json"
      expect(Bookmark.where(user: user).count).to eq(0)
    end

    it "should disallow bookmarks on posts you have no access to" do
      sign_in(Fabricate(:user))
      pm = create_post(user: user, archetype: "private_message", target_usernames: [user.username])

      put "/t/#{pm.topic_id}/bookmark.json"
      expect(response).to be_forbidden
    end

    context "with bookmarks with reminders" do
      it "deletes all the bookmarks for the user in the topic" do
        sign_in(user)
        post = create_post
        Fabricate(:bookmark, bookmarkable: post, user: user)
        put "/t/#{post.topic_id}/remove_bookmarks.json"
        expect(Bookmark.for_user_in_topic(user.id, post.topic_id).count).to eq(0)
      end
    end
  end

  describe "#bookmark" do
    before { sign_in(user) }

    it "should create a new bookmark for the topic" do
      post = create_post
      post2 = create_post(topic_id: post.topic_id)
      put "/t/#{post.topic_id}/bookmark.json"

      expect(Bookmark.find_by(user_id: user.id).bookmarkable_id).to eq(post.topic_id)
    end

    it "errors if the topic is already bookmarked for the user" do
      post = create_post
      Bookmark.create(bookmarkable: post.topic, user: user)

      put "/t/#{post.topic_id}/bookmark.json"
      expect(response.status).to eq(400)
    end
  end

  describe "#reset_new" do
    context "when a user is not signed in" do
      it "fails" do
        put "/topics/reset-new.json"
        expect(response.status).to eq(403)
      end
    end

    context "when a user is signed in" do
      before_all do
        @old_date = 2.years.ago
        user.user_stat.update_column(:new_since, @old_date)

        CategoryUser.set_notification_level_for_category(
          user,
          NotificationLevels.all[:tracking],
          tracked_category.id,
        )
      end

      let!(:old_date) { @old_date }

      before { sign_in(user) }

      context "when tracked is unset" do
        it "updates the `new_since` date" do
          TopicTrackingState.expects(:publish_dismiss_new)

          put "/topics/reset-new.json"
          expect(response.status).to eq(200)
          user.reload
          expect(user.user_stat.new_since.to_date).not_to eq(old_date.to_date)
        end
      end

      describe "when tracked param is true" do
        it "does not update user_stat.new_since" do
          put "/topics/reset-new.json?tracked=true"
          expect(response.status).to eq(200)
          user.reload
          expect(user.user_stat.new_since.to_date).to eq(old_date.to_date)
        end

        it "creates dismissed topic user records for each new topic" do
          tracked_topic = create_post(category: tracked_category).topic

          create_post # This is a new post, but is not tracked so a record will not be created for it
          expect do put "/topics/reset-new.json?tracked=true" end.to change {
            DismissedTopicUser.where(user_id: user.id, topic_id: tracked_topic.id).count
          }.by(1)
        end
      end

      context "when 5 tracked topics exist" do
        before_all do
          @tracked_topic_ids = 5.times.map { create_post(category: tracked_category).topic.id }
          @tracked_topic_ids.freeze
        end

        describe "when tracked param is true" do
          it "creates dismissed topic user records if there are > 30 (default pagination) topics" do
            expect do
              stub_const(TopicQuery, "DEFAULT_PER_PAGE_COUNT", 2) do
                put "/topics/reset-new.json?tracked=true"
              end
            end.to change {
              DismissedTopicUser.where(user_id: user.id, topic_id: @tracked_topic_ids).count
            }.by(5)
          end

          it "creates dismissed topic user records if there are > 30 (default pagination) topics and topic_ids are provided" do
            dismissing_topic_ids = @tracked_topic_ids.sample(4)

            expect do
              stub_const(TopicQuery, "DEFAULT_PER_PAGE_COUNT", 2) do
                put "/topics/reset-new.json?tracked=true",
                    params: {
                      topic_ids: dismissing_topic_ids,
                    }
              end
            end.to change {
              DismissedTopicUser.where(user_id: user.id, topic_id: @tracked_topic_ids).count
            }.by(4)
          end
        end

        context "when two extra topics exist" do
          before_all do
            @topic_ids = @tracked_topic_ids + [Fabricate(:topic).id, Fabricate(:topic).id]
            @topic_ids.freeze
          end

          context "when tracked=false" do
            it "updates the user_stat new_since column and dismisses all the new topics" do
              old_new_since = user.user_stat.new_since

              put "/topics/reset-new.json?tracked=false"
              expect(DismissedTopicUser.where(user_id: user.id, topic_id: @topic_ids).count).to eq(
                7,
              )
              expect(user.reload.user_stat.new_since > old_new_since).to eq(true)
            end

            it "does not pass topic ids that are not new for the user to the bulk action, limit the scope to new topics" do
              dismiss_ids = @topic_ids[0..1]
              other_ids = @topic_ids[2..-1].sort.reverse

              DismissedTopicUser.create(user_id: user.id, topic_id: dismiss_ids.first)
              DismissedTopicUser.create(user_id: user.id, topic_id: dismiss_ids.second)

              expect { put "/topics/reset-new.json?tracked=false" }.to change {
                DismissedTopicUser.where(user_id: user.id).count
              }.by(5)
            end
          end
        end
      end

      context "with category" do
        fab!(:subcategory) { Fabricate(:category, parent_category_id: category.id) }
        fab!(:category_topic) { Fabricate(:topic, category: category) }
        fab!(:subcategory_topic) { Fabricate(:topic, category: subcategory) }

        it "dismisses topics for main category" do
          TopicTrackingState.expects(:publish_dismiss_new).with(
            user.id,
            topic_ids: [category_topic.id],
          )

          put "/topics/reset-new.json?category_id=#{category.id}"

          expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to eq(
            [category_topic.id],
          )
        end

        it "dismisses topics for main category and subcategories" do
          TopicTrackingState.expects(:publish_dismiss_new).with(
            user.id,
            topic_ids: [category_topic.id, subcategory_topic.id],
          )

          put "/topics/reset-new.json?category_id=#{category.id}&include_subcategories=true"

          expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id).sort).to eq(
            [category_topic.id, subcategory_topic.id].sort,
          )
        end
      end

      context "with tag" do
        fab!(:tag_topic) { Fabricate(:topic) }
        fab!(:topic_tag) { Fabricate(:topic_tag, topic: tag_topic, tag: tag) }

        it "dismisses topics for tag" do
          TopicTrackingState.expects(:publish_dismiss_new).with(user.id, topic_ids: [tag_topic.id])
          put "/topics/reset-new.json?tag_id=#{tag.name}"
          expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to eq([tag_topic.id])
        end
      end

      context "with tag and category" do
        fab!(:tag_topic) { Fabricate(:topic) }
        fab!(:topic_tag) { Fabricate(:topic_tag, topic: tag_topic, tag: tag) }
        fab!(:tag_and_category_topic) { Fabricate(:topic, category: category) }
        fab!(:topic_tag2) { Fabricate(:topic_tag, topic: tag_and_category_topic, tag: tag) }

        it "dismisses topics for tag" do
          TopicTrackingState.expects(:publish_dismiss_new).with(
            user.id,
            topic_ids: [tag_and_category_topic.id],
          )
          put "/topics/reset-new.json?tag_id=#{tag.name}&category_id=#{category.id}"
          expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to eq(
            [tag_and_category_topic.id],
          )
        end
      end

      context "with specific topics" do
        fab!(:topic2) { Fabricate(:topic) }
        fab!(:topic3) { Fabricate(:topic) }

        it "updates the `new_since` date" do
          TopicTrackingState
            .expects(:publish_dismiss_new)
            .with(user.id, topic_ids: [topic2.id, topic3.id])
            .at_least_once

          put "/topics/reset-new.json", **{ params: { topic_ids: [topic2.id, topic3.id] } }
          expect(response.status).to eq(200)
          user.reload
          expect(user.user_stat.new_since.to_date).not_to eq(old_date.to_date)
          expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to match_array(
            [topic2.id, topic3.id],
          )
        end

        it "raises an error if topic_ids is provided and it is not an array" do
          put "/topics/reset-new.json", params: { topic_ids: topic2.id }
          expect(response.parsed_body["errors"].first).to match(
            /Expecting topic_ids to contain a list/,
          )
          put "/topics/reset-new.json", params: { topic_ids: [topic2.id] }
          expect(response.parsed_body["errors"]).to eq(nil)
        end

        describe "when tracked param is true" do
          it "does not update user_stat.new_since and does not dismiss untracked topics" do
            put "/topics/reset-new.json?tracked=true",
                **{ params: { topic_ids: [topic2.id, topic3.id] } }
            expect(response.status).to eq(200)
            user.reload
            expect(user.user_stat.new_since.to_date).to eq(old_date.to_date)
            expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to be_empty
          end

          it "creates topic user records for each unread topic" do
            tracked_topic = create_post.topic
            tracked_topic.update!(category_id: tracked_category.id)
            topic2.update!(category_id: tracked_category.id)

            create_post # This is a new post, but is not tracked so a record will not be created for it
            expect do
              put "/topics/reset-new.json?tracked=true",
                  **{ params: { topic_ids: [tracked_topic.id, topic2.id, topic3.id] } }
            end.to change { DismissedTopicUser.where(user_id: user.id).count }.by(2)
            expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to match_array(
              [tracked_topic.id, topic2.id],
            )
          end
        end
      end
    end
  end

  describe "#feature_stats" do
    it "works" do
      get "/topics/feature_stats.json", params: { category_id: 1 }

      expect(response.status).to eq(200)
      json = response.parsed_body
      expect(json["pinned_in_category_count"]).to eq(0)
      expect(json["pinned_globally_count"]).to eq(0)
      expect(json["banner_count"]).to eq(0)
    end

    it "allows unlisted banner topic" do
      Fabricate(:topic, category_id: 1, archetype: Archetype.banner, visible: false)

      get "/topics/feature_stats.json", params: { category_id: 1 }
      json = response.parsed_body
      expect(json["banner_count"]).to eq(1)
    end
  end

  describe "#excerpts" do
    it "can correctly get excerpts" do
      first_post =
        create_post(raw: "This is the first post :)", title: "This is a test title I am making yay")
      second_post = create_post(raw: "This is second post", topic: first_post.topic)
      third_post = first_post.topic.add_small_action(first_post.user, "autobumped")

      random_post = Fabricate(:post, user: post_author1)

      get "/t/#{first_post.topic_id}/excerpts.json",
          params: {
            post_ids: [first_post.id, second_post.id, third_post.id, random_post.id],
          }

      json = response.parsed_body
      json.sort! { |a, b| a["post_id"] <=> b["post_id"] }

      # no random post
      expect(json.map { |p| p["post_id"] }).to contain_exactly(
        first_post.id,
        second_post.id,
        third_post.id,
      )
      # keep emoji images
      expect(json[0]["excerpt"]).to match(/emoji/)
      expect(json[0]["excerpt"]).to match(/first post/)
      expect(json[0]["username"]).to eq(first_post.user.username)
      expect(json[0]["created_at"].present?).to eq(false)

      expect(json[1]["excerpt"]).to match(/second post/)

      expect(json[2]["action_code"]).to eq("autobumped")
      expect(json[2]["created_at"].present?).to eq(true)
    end
  end

  describe "#convert_topic" do
    it "needs you to be logged in" do
      put "/t/111/convert-topic/private.json"
      expect(response.status).to eq(403)
    end

    describe "converting public topic to private message" do
      fab!(:topic) { Fabricate(:topic, user: user) }
      fab!(:post) { Fabricate(:post, user: user, topic: topic) }

      before { Group.refresh_automatic_groups! }

      it "raises an error when the user doesn't have permission to convert topic" do
        sign_in(user)
        put "/t/#{topic.id}/convert-topic/private.json"
        expect(response).to be_forbidden
      end

      context "with success" do
        it "returns success" do
          sign_in(admin)
          put "/t/#{topic.id}/convert-topic/private.json"

          topic.reload
          expect(topic.archetype).to eq(Archetype.private_message)
          expect(response.status).to eq(200)

          result = response.parsed_body
          expect(result["success"]).to eq(true)
          expect(result["url"]).to be_present
        end
      end
    end

    describe "converting private message to public topic" do
      fab!(:topic) { Fabricate(:private_message_topic, user: user) }
      fab!(:post) { Fabricate(:post, user: post_author1, topic: topic) }

      before { Group.refresh_automatic_groups! }

      it "raises an error when the user doesn't have permission to convert topic" do
        sign_in(user)
        put "/t/#{topic.id}/convert-topic/public.json"
        expect(response).to be_forbidden
      end

      context "with success" do
        it "returns success" do
          sign_in(admin)
          put "/t/#{topic.id}/convert-topic/public.json?category_id=#{category.id}"

          topic.reload
          expect(topic.archetype).to eq(Archetype.default)
          expect(topic.category_id).to eq(category.id)
          expect(response.status).to eq(200)

          result = response.parsed_body
          expect(result["success"]).to eq(true)
          expect(result["url"]).to be_present
        end
      end
    end
  end

  describe "#timings" do
    fab!(:post_1) { Fabricate(:post, user: post_author1, topic: topic) }

    it "should record the timing" do
      sign_in(user)

      post "/topics/timings.json",
           params: {
             topic_id: topic.id,
             topic_time: 5,
             timings: {
               post_1.post_number => 2,
             },
           }

      expect(response.status).to eq(200)

      post_timing = PostTiming.first

      expect(post_timing.topic).to eq(topic)
      expect(post_timing.user).to eq(user)
      expect(post_timing.msecs).to eq(2)
    end

    it "caps post read time at the max integer value (2^31 - 1)" do
      PostTiming.create!(
        topic_id: post_1.topic.id,
        post_number: post_1.post_number,
        user_id: user.id,
        msecs: 2**31 - 10,
      )
      sign_in(user)

      post "/topics/timings.json",
           params: {
             topic_id: topic.id,
             topic_time: 5,
             timings: {
               post_1.post_number => 100,
             },
           }

      expect(response.status).to eq(200)
      post_timing = PostTiming.first

      expect(post_timing.topic).to eq(topic)
      expect(post_timing.user).to eq(user)
      expect(post_timing.msecs).to eq(2**31 - 1)
    end
  end

  describe "#timer" do
    context "when a user is not logged in" do
      it "should return the right response" do
        post "/t/#{topic.id}/timer.json", params: { time: "24", status_type: TopicTimer.types[1] }
        expect(response.status).to eq(403)
      end
    end

    context "when does not have permission" do
      it "should return the right response" do
        sign_in(user)

        post "/t/#{topic.id}/timer.json", params: { time: "24", status_type: TopicTimer.types[1] }

        expect(response.status).to eq(403)
        expect(response.parsed_body["error_type"]).to eq("invalid_access")
      end
    end

    context "when time is in the past" do
      it "returns an error" do
        freeze_time
        sign_in(admin)

        post "/t/#{topic.id}/timer.json",
             params: {
               time: Time.current - 1.day,
               status_type: TopicTimer.types[1],
             }
        expect(response.status).to eq(400)
      end
    end

    context "when logged in as an admin" do
      before do
        freeze_time
        sign_in(admin)
      end

      it "should be able to create a topic status update" do
        post "/t/#{topic.id}/timer.json", params: { time: 24, status_type: TopicTimer.types[1] }

        expect(response.status).to eq(200)

        topic_status_update = TopicTimer.last

        expect(topic_status_update.topic).to eq(topic)
        expect(topic_status_update.execute_at).to eq_time(24.hours.from_now)

        json = response.parsed_body

        expect(DateTime.parse(json["execute_at"])).to eq_time(
          DateTime.parse(topic_status_update.execute_at.to_s),
        )

        expect(json["duration_minutes"]).to eq(topic_status_update.duration_minutes)
        expect(json["closed"]).to eq(topic.reload.closed)
      end

      it "should be able to delete a topic status update" do
        Fabricate(:topic_timer, topic: topic)

        post "/t/#{topic.id}/timer.json", params: { time: nil, status_type: TopicTimer.types[1] }

        expect(response.status).to eq(200)
        expect(topic.reload.public_topic_timer).to eq(nil)

        json = response.parsed_body

        expect(json["execute_at"]).to eq(nil)
        expect(json["duration_minutes"]).to eq(nil)
        expect(json["closed"]).to eq(topic.closed)
      end

      it "should be able to create a topic status update with duration" do
        post "/t/#{topic.id}/timer.json",
             params: {
               duration_minutes: 7200,
               status_type: TopicTimer.types[7],
             }

        expect(response.status).to eq(200)

        topic_status_update = TopicTimer.last

        expect(topic_status_update.topic).to eq(topic)
        expect(topic_status_update.execute_at).to eq_time(5.days.from_now)
        expect(topic_status_update.duration_minutes).to eq(7200)

        json = response.parsed_body

        expect(DateTime.parse(json["execute_at"])).to eq_time(
          DateTime.parse(topic_status_update.execute_at.to_s),
        )

        expect(json["duration_minutes"]).to eq(topic_status_update.duration_minutes)
      end

      it "should be able to delete a topic status update for delete_replies type" do
        Fabricate(:topic_timer, topic: topic, status_type: TopicTimer.types[:delete_replies])

        post "/t/#{topic.id}/timer.json", params: { time: nil, status_type: TopicTimer.types[7] }

        expect(response.status).to eq(200)
        expect(topic.reload.public_topic_timer).to eq(nil)

        json = response.parsed_body

        expect(json["execute_at"]).to eq(nil)
        expect(json["duration"]).to eq(nil)
        expect(json["closed"]).to eq(topic.closed)
      end

      describe "publishing topic to category in the future" do
        it "should be able to create the topic status update" do
          post "/t/#{topic.id}/timer.json",
               params: {
                 time: 24,
                 status_type: TopicTimer.types[3],
                 category_id: topic.category_id,
               }

          expect(response.status).to eq(200)

          topic_status_update = TopicTimer.last

          expect(topic_status_update.topic).to eq(topic)
          expect(topic_status_update.execute_at).to eq_time(24.hours.from_now)
          expect(topic_status_update.status_type).to eq(TopicTimer.types[:publish_to_category])

          json = response.parsed_body

          expect(json["category_id"]).to eq(topic.category_id)
        end
      end

      describe "invalid status type" do
        it "should raise the right error" do
          post "/t/#{topic.id}/timer.json", params: { time: 10, status_type: "something" }
          expect(response.status).to eq(400)
          expect(response.body).to include("status_type")
        end
      end
    end

    context "when logged in as a TL4 user" do
      before { SiteSetting.enable_category_group_moderation = true }
      it "raises an error if the user can't see the topic" do
        user.update!(trust_level: TrustLevel[4])
        sign_in(user)

        pm_topic = Fabricate(:private_message_topic)

        post "/t/#{pm_topic.id}/timer.json",
             params: {
               time: "24",
               status_type: TopicTimer.types[1],
             }

        expect(response.status).to eq(403)
        expect(response.parsed_body["error_type"]).to eq("invalid_access")
      end

      it "allows a category moderator to create a delete timer" do
        user.update!(trust_level: TrustLevel[4])
        topic.category.update!(reviewable_by_group: user.groups.first)

        sign_in(user)

        post "/t/#{topic.id}/timer.json", params: { time: 10, status_type: "delete" }

        expect(response.status).to eq(200)
      end

      it "raises an error setting a delete timer" do
        user.update!(trust_level: TrustLevel[4])
        sign_in(user)

        post "/t/#{topic.id}/timer.json", params: { time: 10, status_type: "delete" }

        expect(response.status).to eq(403)
        expect(response.parsed_body["error_type"]).to eq("invalid_access")
      end

      it "raises an error setting delete_replies timer" do
        user.update!(trust_level: TrustLevel[4])
        sign_in(user)

        post "/t/#{topic.id}/timer.json", params: { time: 10, status_type: "delete_replies" }

        expect(response.status).to eq(403)
        expect(response.parsed_body["error_type"]).to eq("invalid_access")
      end
    end
  end

  describe "#set_slow_mode" do
    context "when not logged in" do
      it "returns a forbidden response" do
        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "3600" }

        expect(response.status).to eq(403)
      end
    end

    context "when logged in as an admin" do
      it "allows admins to set the slow mode interval" do
        sign_in(admin)

        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "3600" }

        topic.reload
        expect(response.status).to eq(200)
        expect(topic.slow_mode_seconds).to eq(3600)
      end
    end

    context "when logged in as a regular user" do
      it "does nothing if the user is not TL4" do
        user.update!(trust_level: TrustLevel[3])
        sign_in(user)

        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "3600" }

        expect(response.status).to eq(403)
      end

      it "allows TL4 users to set the slow mode interval" do
        user.update!(trust_level: TrustLevel[4])
        sign_in(user)

        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "3600" }

        topic.reload
        expect(response.status).to eq(200)
        expect(topic.slow_mode_seconds).to eq(3600)
      end
    end

    context "with auto-disable slow mode" do
      before { sign_in(admin) }

      let!(:timestamp) { 1.week.from_now.to_formatted_s(:iso8601) }

      it "sets a topic timer to clear the slow mode automatically" do
        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "3600", enabled_until: timestamp }

        created_timer = TopicTimer.find_by(topic: topic)
        execute_at = created_timer.execute_at.to_formatted_s(:iso8601)

        expect(execute_at).to eq(timestamp)
      end

      it "deletes the topic timer" do
        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "3600", enabled_until: timestamp }

        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "0", enabled_until: timestamp }

        created_timer = TopicTimer.find_by(topic: topic)

        expect(created_timer).to be_nil
      end

      it "updates the existing timer" do
        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "3600", enabled_until: timestamp }

        updated_timestamp = 1.hour.from_now.to_formatted_s(:iso8601)

        put "/t/#{topic.id}/slow_mode.json",
            params: {
              seconds: "3600",
              enabled_until: updated_timestamp,
            }

        created_timer = TopicTimer.find_by(topic: topic)
        execute_at = created_timer.execute_at.to_formatted_s(:iso8601)

        expect(execute_at).to eq(updated_timestamp)
      end
    end
  end

  describe "#invite" do
    context "when not logged in" do
      it "should return the right response" do
        post "/t/#{topic.id}/invite.json", params: { email: "jake@adventuretime.ooo" }

        expect(response.status).to eq(403)
      end
    end

    context "when logged in" do
      before { sign_in(user) }

      context "when topic id is not PM" do
        fab!(:user_topic) { Fabricate(:topic, user: user) }

        it "should return the right response" do
          user.update!(trust_level: SiteSetting.min_trust_level_to_allow_invite)

          post "/t/#{user_topic.id}/invite.json", params: { email: "someguy@email.com" }

          expect(response.status).to eq(422)
        end
      end

      context "when topic id is invalid" do
        it "should return the right response" do
          id = topic.id
          topic.destroy!
          post "/t/#{id}/invite.json", params: { email: user.email }

          expect(response.status).to eq(404)
        end
      end

      it "requires an email parameter" do
        post "/t/#{topic.id}/invite.json"
        expect(response.status).to eq(422)
      end

      context "when PM has reached maximum allowed numbers of recipients" do
        fab!(:pm) { Fabricate(:private_message_topic, user: user) }

        fab!(:moderator_pm) { Fabricate(:private_message_topic, user: moderator) }

        before do
          SiteSetting.max_allowed_message_recipients = 2
          Group.refresh_automatic_groups!
        end

        it "doesn't allow normal users to invite" do
          post "/t/#{pm.id}/invite.json", params: { user: user_2.username }
          expect(response.status).to eq(422)
          expect(response.parsed_body["errors"]).to contain_exactly(
            I18n.t(
              "pm_reached_recipients_limit",
              recipients_limit: SiteSetting.max_allowed_message_recipients,
            ),
          )
        end

        it "allows staff to bypass limits" do
          sign_in(moderator)
          post "/t/#{moderator_pm.id}/invite.json", params: { user: user_2.username }
          expect(response.status).to eq(200)
          expect(moderator_pm.reload.topic_allowed_users.count).to eq(3)
        end
      end

      context "when user does not have permission to invite to the topic" do
        fab!(:topic) { pm }

        it "should return the right response" do
          post "/t/#{topic.id}/invite.json", params: { user: user.username }

          expect(response.status).to eq(403)
        end
      end
    end
  end

  describe "invite_group" do
    let!(:admins) { Group[:admins] }

    def invite_group(topic, expected_status)
      post "/t/#{topic.id}/invite-group.json", params: { group: admins.name }
      expect(response.status).to eq(expected_status)
    end

    before { admins.update!(messageable_level: Group::ALIAS_LEVELS[:everyone]) }

    context "as an anon user" do
      it "should be forbidden" do
        invite_group(pm, 403)
      end
    end

    context "as a normal user" do
      before { sign_in(user) }

      context "when user does not have permission to view the topic" do
        it "should be forbidden" do
          invite_group(pm, 403)
        end
      end

      context "when user has permission to view the topic" do
        before { pm.allowed_users << user }

        it "should allow user to invite group to topic" do
          invite_group(pm, 200)
          expect(pm.allowed_groups.first.id).to eq(admins.id)
        end
      end
    end

    context "as an admin user" do
      before { sign_in(admin) }

      it "disallows inviting a group to a topic" do
        invite_group(topic, 422)
      end

      it "allows inviting a group to a PM" do
        invite_group(pm, 200)
        expect(pm.allowed_groups.first.id).to eq(admins.id)
      end
    end

    context "when PM has reached maximum allowed numbers of recipients" do
      fab!(:group) { Fabricate(:group, messageable_level: 99) }
      fab!(:pm) { Fabricate(:private_message_topic, user: user) }

      fab!(:moderator_pm) { Fabricate(:private_message_topic, user: moderator) }

      before { SiteSetting.max_allowed_message_recipients = 2 }

      it "doesn't allow normal users to invite" do
        post "/t/#{pm.id}/invite-group.json", params: { group: group.name }
        expect(response.status).to eq(422)
        expect(response.parsed_body["errors"]).to contain_exactly(
          I18n.t(
            "pm_reached_recipients_limit",
            recipients_limit: SiteSetting.max_allowed_message_recipients,
          ),
        )
      end

      it "allows staff to bypass limits" do
        sign_in(moderator)
        post "/t/#{moderator_pm.id}/invite-group.json", params: { group: group.name }
        expect(response.status).to eq(200)
        expect(
          moderator_pm.reload.topic_allowed_users.count + moderator_pm.topic_allowed_groups.count,
        ).to eq(3)
      end
    end
  end

  describe "shared drafts" do
    before { SiteSetting.shared_drafts_category = shared_drafts_category.id }

    describe "#update_shared_draft" do
      fab!(:other_cat) { Fabricate(:category) }
      fab!(:topic) { Fabricate(:topic, category: shared_drafts_category, visible: false) }

      context "when anonymous" do
        it "doesn't allow staff to update the shared draft" do
          put "/t/#{topic.id}/shared-draft.json", params: { category_id: other_cat.id }
          expect(response.code.to_i).to eq(403)
        end
      end

      context "as a moderator" do
        before { sign_in(moderator) }

        context "with a shared draft" do
          fab!(:shared_draft) { Fabricate(:shared_draft, topic: topic, category: category) }
          it "allows staff to update the category id" do
            put "/t/#{topic.id}/shared-draft.json", params: { category_id: other_cat.id }
            expect(response.status).to eq(200)
            topic.reload
            expect(topic.shared_draft.category_id).to eq(other_cat.id)
          end
        end

        context "without a shared draft" do
          it "allows staff to update the category id" do
            put "/t/#{topic.id}/shared-draft.json", params: { category_id: other_cat.id }
            expect(response.status).to eq(200)
            topic.reload
            expect(topic.shared_draft.category_id).to eq(other_cat.id)
          end
        end
      end
    end

    describe "#publish" do
      fab!(:topic) { Fabricate(:topic, category: shared_drafts_category, visible: false) }
      fab!(:post) { Fabricate(:post, user: post_author1, topic: topic) }

      it "fails for anonymous users" do
        put "/t/#{topic.id}/publish.json", params: { destination_category_id: category.id }
        expect(response.status).to eq(403)
      end

      it "fails as a regular user" do
        sign_in(user)
        put "/t/#{topic.id}/publish.json", params: { destination_category_id: category.id }
        expect(response.status).to eq(403)
      end

      context "as staff" do
        before { sign_in(moderator) }

        it "will publish the topic" do
          put "/t/#{topic.id}/publish.json", params: { destination_category_id: category.id }
          expect(response.status).to eq(200)
          json = response.parsed_body["basic_topic"]

          result = Topic.find(json["id"])
          expect(result.category_id).to eq(category.id)
          expect(result.visible).to eq(true)
        end

        it "fails if the destination category is the shared drafts category" do
          put "/t/#{topic.id}/publish.json",
              params: {
                destination_category_id: shared_drafts_category.id,
              }
          expect(response.status).to eq(400)
        end
      end
    end
  end

  describe "crawler" do
    context "when not a crawler" do
      it "renders with the application layout" do
        get topic.url

        body = response.body

        expect(body).to have_tag(:script, with: { src: "/assets/discourse.js" })
        expect(body).to have_tag(:meta, with: { name: "fragment" })
      end
    end

    context "when a crawler" do
      it "renders with the crawler layout, and handles proper pagination" do
        page1_time = 3.months.ago
        page2_time = 2.months.ago
        page3_time = 1.month.ago

        freeze_time page1_time

        Fabricate(:post, user: post_author2, topic: topic)
        Fabricate(:post, user: post_author3, topic: topic)

        freeze_time page2_time
        Fabricate(:post, user: post_author4, topic: topic)
        Fabricate(:post, user: post_author5, topic: topic)

        freeze_time page3_time
        Fabricate(:post, user: post_author6, topic: topic)

        # ugly, but no interface to set this and we don't want to create
        # 100 posts to test this thing
        TopicView.stubs(:chunk_size).returns(2)

        user_agent = "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"

        get topic.url, env: { "HTTP_USER_AGENT" => user_agent }

        body = response.body

        expect(body).to have_tag(:body, with: { class: "crawler" })
        expect(body).to_not have_tag(:meta, with: { name: "fragment" })
        expect(body).to include('<link rel="next" href="' + topic.relative_url + "?page=2")

        expect(body).to include("id='post_1'")
        expect(body).to include("id='post_2'")

        expect(response.headers["Last-Modified"]).to eq(page1_time.httpdate)

        get topic.url + "?page=2", env: { "HTTP_USER_AGENT" => user_agent }
        body = response.body

        expect(response.headers["Last-Modified"]).to eq(page2_time.httpdate)

        expect(body).to include("id='post_3'")
        expect(body).to include("id='post_4'")

        expect(body).to include('<link rel="prev" href="' + topic.relative_url)
        expect(body).to include('<link rel="next" href="' + topic.relative_url + "?page=3")

        get topic.url + "?page=3", env: { "HTTP_USER_AGENT" => user_agent }
        body = response.body

        expect(response.headers["Last-Modified"]).to eq(page3_time.httpdate)
        expect(body).to include('<link rel="prev" href="' + topic.relative_url + "?page=2")
      end

      context "with canonical_url" do
        fab!(:topic_embed) { Fabricate(:topic_embed, embed_url: "https://markvanlan.com") }
        let!(:user_agent) do
          "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
        end

        it "set to topic.url when embed_set_canonical_url is false" do
          get topic_embed.topic.url, env: { "HTTP_USER_AGENT" => user_agent }
          expect(response.body).to include('<link rel="canonical" href="' + topic_embed.topic.url)
        end

        it "set to topic_embed.embed_url when embed_set_canonical_url is true" do
          SiteSetting.embed_set_canonical_url = true
          get topic_embed.topic.url, env: { "HTTP_USER_AGENT" => user_agent }
          expect(response.body).to include('<link rel="canonical" href="' + topic_embed.embed_url)
        end
      end

      context "with wayback machine" do
        it "renders crawler layout" do
          get topic.url,
              env: {
                "HTTP_USER_AGENT" =>
                  "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36",
                "HTTP_VIA" => "HTTP/1.0 web.archive.org (Wayback Save Page)",
              }
          body = response.body

          expect(body).to have_tag(:body, with: { class: "crawler" })
          expect(body).to_not have_tag(:meta, with: { name: "fragment" })
        end
      end
    end
  end

  describe "#reset_bump_date" do
    context "with errors" do
      it "needs you to be logged in" do
        put "/t/#{topic.id}/reset-bump-date.json"
        expect(response.status).to eq(403)
      end

      [:user].each do |user|
        it "denies access for #{user}" do
          sign_in(Fabricate(user))
          put "/t/#{topic.id}/reset-bump-date.json"
          expect(response.status).to eq(403)
        end
      end

      it "should fail for non-existent topic" do
        max_id = Topic.maximum(:id)
        sign_in(admin)
        put "/t/#{max_id + 1}/reset-bump-date.json"
        expect(response.status).to eq(404)
      end
    end

    %i[admin moderator trust_level_4].each do |user|
      it "should reset bumped_at as #{user}" do
        sign_in(public_send(user))
        topic.update!(bumped_at: 1.hour.ago)
        timestamp = 1.day.ago
        Fabricate(:post, user: post_author1, topic: topic, created_at: timestamp)

        put "/t/#{topic.id}/reset-bump-date.json"
        expect(response.status).to eq(200)
        expect(topic.reload.bumped_at).to eq_time(timestamp)
      end
    end
  end

  describe "#private_message_reset_new" do
    before_all { Group.refresh_automatic_groups! }

    fab!(:group) do
      Fabricate(:group, messageable_level: Group::ALIAS_LEVELS[:everyone]).tap { |g| g.add(user_2) }
    end

    fab!(:group_message) do
      create_post(
        user: user,
        target_group_names: [group.name],
        archetype: Archetype.private_message,
      ).topic
    end

    fab!(:private_message) do
      create_post(
        user: user,
        target_usernames: [user_2.username],
        archetype: Archetype.private_message,
      ).topic
    end

    fab!(:private_message_2) do
      create_post(
        user: user,
        target_usernames: [user_2.username],
        archetype: Archetype.private_message,
      ).topic
    end

    before { sign_in(user_2) }

    it "returns the right response when inbox param is missing" do
      put "/topics/pm-reset-new.json"

      expect(response.status).to eq(400)
    end

    it "returns the right response when trying to reset new private messages of an invalid group" do
      put "/topics/pm-reset-new.json", params: { inbox: "group", group_name: "randomgroup" }

      expect(response.status).to eq(404)
    end

    it "returns the right response when trying to reset new private messages of a restricted group" do
      sign_in(user)

      put "/topics/pm-reset-new.json", params: { inbox: "group", group_name: group.name }

      expect(response.status).to eq(404)
    end

    it "can reset all new group private messages" do
      put "/topics/pm-reset-new.json", params: { inbox: "group", group_name: group.name }

      expect(response.status).to eq(200)
      expect(response.parsed_body["topic_ids"]).to contain_exactly(group_message.id)

      expect(DismissedTopicUser.count).to eq(1)

      expect(DismissedTopicUser.exists?(topic: group_message, user: user_2)).to eq(true)
    end

    it "can reset new personal private messages" do
      put "/topics/pm-reset-new.json", params: { inbox: "user" }

      expect(response.status).to eq(200)
      expect(response.parsed_body["topic_ids"]).to contain_exactly(
        private_message.id,
        private_message_2.id,
      )

      expect(DismissedTopicUser.count).to eq(2)

      expect(
        DismissedTopicUser.exists?(user: user_2, topic: [private_message, private_message_2]),
      ).to eq(true)
    end

    it "can reset new personal and group private messages" do
      stub_const(TopicQuery, "DEFAULT_PER_PAGE_COUNT", 1) do
        put "/topics/pm-reset-new.json", params: { inbox: "all" }

        expect(response.status).to eq(200)

        expect(DismissedTopicUser.count).to eq(3)

        expect(
          DismissedTopicUser.exists?(
            user: user_2,
            topic: [private_message, private_message_2, group_message],
          ),
        ).to eq(true)
      end
    end

    it "returns the right response is topic_ids params is not valid" do
      put "/topics/pm-reset-new.json", params: { topic_ids: "1" }

      expect(response.status).to eq(400)
    end

    it "can reset new private messages from given topic ids" do
      put "/topics/pm-reset-new.json", params: { topic_ids: [group_message.id, "12345"] }

      expect(response.status).to eq(200)

      expect(DismissedTopicUser.count).to eq(1)

      expect(DismissedTopicUser.exists?(topic: group_message, user: user_2)).to eq(true)

      put "/topics/pm-reset-new.json", params: { topic_ids: [private_message.id, "12345"] }

      expect(response.status).to eq(200)

      expect(DismissedTopicUser.exists?(topic: private_message, user: user_2)).to eq(true)
    end
  end

  describe "#archive_message" do
    before_all { Group.refresh_automatic_groups! }

    fab!(:group) do
      Fabricate(:group, messageable_level: Group::ALIAS_LEVELS[:everyone]).tap { |g| g.add(user) }
    end

    fab!(:group_message) do
      create_post(
        user: user,
        target_group_names: [group.name],
        archetype: Archetype.private_message,
      ).topic
    end

    it "should be able to archive a private message" do
      sign_in(user)

      message =
        MessageBus
          .track_publish(PrivateMessageTopicTrackingState.group_channel(group.id)) do
            put "/t/#{group_message.id}/archive-message.json"

            expect(response.status).to eq(200)
          end
          .first

      expect(message.data["message_type"]).to eq(
        PrivateMessageTopicTrackingState::GROUP_ARCHIVE_MESSAGE_TYPE,
      )

      expect(message.data["payload"]["acting_user_id"]).to eq(user.id)

      body = response.parsed_body

      expect(body["group_name"]).to eq(group.name)
    end
  end
end