discourse/spec/requests/categories_controller_spec.rb

# frozen_string_literal: true

RSpec.describe CategoriesController do
  let(:admin) { Fabricate(:admin) }
  let!(:category) { Fabricate(:category, user: admin) }
  fab!(:user) { Fabricate(:user) }

  describe "#index" do
    it "web crawler view has correct urls for subfolder install" do
      set_subfolder "/forum"
      get "/categories", headers: { "HTTP_USER_AGENT" => "Googlebot" }
      html = Nokogiri.HTML5(response.body)
      expect(html.css("body.crawler")).to be_present
      expect(html.css("a[href=\"/forum/c/#{category.slug}/#{category.id}\"]")).to be_present
    end

    it "properly preloads topic list" do
      SiteSetting.categories_topics = 5
      SiteSetting.categories_topics.times { Fabricate(:topic) }
      get "/categories"

      expect(response.body).to have_tag("div#data-preloaded") do |element|
        json = JSON.parse(element.current_scope.attribute("data-preloaded").value)
        expect(json["topic_list"]).to include(%{"more_topics_url":"/latest"})
      end
    end

    it "Shows correct title if category list is set for homepage" do
      SiteSetting.top_menu = "categories|latest"
      get "/"

      expect(response.body).to have_tag "title", text: "Discourse"

      SiteSetting.short_site_description = "Official community"
      get "/"

      expect(response.body).to have_tag "title", text: "Discourse - Official community"
    end

    it "redirects /category paths to /c paths" do
      get "/category/uncategorized"
      expect(response.status).to eq(302)
      expect(response.body).to include("c/uncategorized")
    end

    it "respects permalinks before redirecting /category paths to /c paths" do
      _perm = Permalink.create!(url: "category/something", category_id: category.id)

      get "/category/something"
      expect(response.status).to eq(301)
      expect(response.body).to include(category.slug)
    end

    it "returns the right response for a normal user" do
      sign_in(user)

      get "/categories.json"

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

      category_list = response.parsed_body["category_list"]

      expect(category_list["categories"].map { |c| c["id"] }).to contain_exactly(
        SiteSetting.get(:uncategorized_category_id),
        category.id,
      )
    end

    it "does not returns subcatgories without permission" do
      subcategory = Fabricate(:category, user: admin, parent_category: category)
      subcategory.set_permissions(admins: :full)
      subcategory.save!

      sign_in(user)

      get "/categories.json?include_subcategories=true"

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

      category_list = response.parsed_body["category_list"]

      subcategories_for_category = category_list["categories"][1]["subcategory_list"]
      expect(subcategories_for_category).to eq(nil)
    end

    it "returns the right subcategory response with permission" do
      subcategory = Fabricate(:category, user: admin, parent_category: category)

      sign_in(user)

      get "/categories.json?include_subcategories=true"

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

      category_list = response.parsed_body["category_list"]

      subcategories_for_category = category_list["categories"][1]["subcategory_list"]
      expect(subcategories_for_category.count).to eq(1)
      expect(subcategories_for_category.first["parent_category_id"]).to eq(category.id)
      expect(subcategories_for_category.first["id"]).to eq(subcategory.id)
    end

    it "does not return subcategories without query param" do
      subcategory = Fabricate(:category, user: admin, parent_category: category)

      sign_in(user)

      get "/categories.json"

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

      category_list = response.parsed_body["category_list"]

      subcategories_for_category = category_list["categories"][1]["subcategory_list"]
      expect(subcategories_for_category).to eq(nil)
    end

    it "includes topics for categories, subcategories and subsubcategories when requested" do
      SiteSetting.max_category_nesting = 3
      subcategory = Fabricate(:category, user: admin, parent_category: category)
      subsubcategory = Fabricate(:category, user: admin, parent_category: subcategory)

      topic1 = Fabricate(:topic, category: category)
      topic2 = Fabricate(:topic, category: subcategory)
      topic3 = Fabricate(:topic, category: subsubcategory)
      CategoryFeaturedTopic.feature_topics

      get "/categories.json?include_subcategories=true&include_topics=true"
      expect(response.status).to eq(200)

      category_list = response.parsed_body["category_list"]

      category_response = category_list["categories"].find { |c| c["id"] == category.id }
      expect(category_response["topics"].map { |c| c["id"] }).to contain_exactly(topic1.id)

      subcategory_response = category_response["subcategory_list"][0]
      expect(subcategory_response["topics"].map { |c| c["id"] }).to contain_exactly(topic2.id)

      subsubcategory_response = subcategory_response["subcategory_list"][0]
      expect(subsubcategory_response["topics"].map { |c| c["id"] }).to contain_exactly(topic3.id)
    end

    describe "topics filtered by tag for categories when requested" do
      fab!(:tag) { Fabricate(:tag, name: "test-tag") }
      fab!(:tag_2) { Fabricate(:tag, name: "second-test-tag") }
      let(:topics_with_filter_tag) { [] }

      before { SiteSetting.max_category_nesting = 3 }

      it "includes filtered topics for categories" do
        2.times do |i|
          topics_with_filter_tag << Fabricate(:topic, category: category, tags: [tag])
          Fabricate(:topic, category: category, tags: [tag_2])
        end
        CategoryFeaturedTopic.feature_topics

        get "/categories.json?tag=#{tag.name}&include_topics=true"
        expect(response.status).to eq(200)

        category_list = response.parsed_body["category_list"]
        category_response = category_list["categories"].find { |c| c["id"] == category.id }

        expect(category_response["topics"].map { |c| c["id"] }).to contain_exactly(
          *topics_with_filter_tag.map(&:id),
        )
      end

      it "includes filtered topics for subcategories" do
        subcategory = Fabricate(:category, user: admin, parent_category: category)

        2.times do |i|
          topics_with_filter_tag << Fabricate(:topic, category: subcategory, tags: [tag])
          Fabricate(:topic, category: subcategory, tags: [tag_2])
        end
        CategoryFeaturedTopic.feature_topics

        get "/categories.json?tag=#{tag.name}&include_subcategories=true&include_topics=true"
        expect(response.status).to eq(200)

        category_list = response.parsed_body["category_list"]
        category_response = category_list["categories"].find { |c| c["id"] == category.id }
        subcategory_response = category_response["subcategory_list"][0]

        expect(subcategory_response["topics"].map { |c| c["id"] }).to contain_exactly(
          *topics_with_filter_tag.map(&:id),
        )
      end

      it "includes filtered topics for subsubcategories" do
        subcategory = Fabricate(:category, user: admin, parent_category: category)
        subsubcategory = Fabricate(:category, user: admin, parent_category: subcategory)

        2.times do |i|
          topics_with_filter_tag << Fabricate(:topic, category: subsubcategory, tags: [tag])
          Fabricate(:topic, category: subsubcategory, tags: [tag_2])
        end
        CategoryFeaturedTopic.feature_topics

        get "/categories.json?tag=#{tag.name}&include_subcategories=true&include_topics=true"
        expect(response.status).to eq(200)

        category_list = response.parsed_body["category_list"]
        category_response = category_list["categories"].find { |c| c["id"] == category.id }
        subsubcategory_response = category_response["subcategory_list"][0]["subcategory_list"][0]

        expect(subsubcategory_response["topics"].map { |c| c["id"] }).to contain_exactly(
          *topics_with_filter_tag.map(&:id),
        )
      end
    end

    describe "categories and latest topics - ordered by created date" do
      fab!(:category) { Fabricate(:category) }
      fab!(:topic1) do
        Fabricate(
          :topic,
          category: category,
          created_at: 5.days.ago,
          updated_at: Time.now,
          bumped_at: Time.now,
        )
      end
      fab!(:topic2) do
        Fabricate(:topic, category: category, created_at: 2.days.ago, bumped_at: 2.days.ago)
      end
      fab!(:topic3) do
        Fabricate(:topic, category: category, created_at: 1.day.ago, bumped_at: 1.day.ago)
      end

      context "when order is not set to created date" do
        before { SiteSetting.desktop_category_page_style = "categories_and_latest_topics" }

        it "sorts topics by the default bump date" do
          get "/categories_and_latest.json"
          expect(response.status).to eq(200)
          expect(response.parsed_body["topic_list"]["topics"].map { |t| t["id"] }).to eq(
            [topic1.id, topic3.id, topic2.id],
          )
        end
      end

      context "when order is set to created" do
        before do
          SiteSetting.desktop_category_page_style = "categories_and_latest_topics_created_date"
        end

        it "sorts topics by crated at date" do
          get "/categories_and_latest.json"
          expect(response.status).to eq(200)
          expect(response.parsed_body["topic_list"]["topics"].map { |t| t["id"] }).to eq(
            [topic3.id, topic2.id, topic1.id],
          )
        end
      end
    end

    describe "welcome topic" do
      fab!(:category) { Fabricate(:category) }
      fab!(:topic1) do
        Fabricate(
          :topic,
          category: category,
          created_at: 5.days.ago,
          updated_at: Time.now,
          bumped_at: Time.now,
        )
      end
      fab!(:topic2) do
        Fabricate(:topic, category: category, created_at: 2.days.ago, bumped_at: 2.days.ago)
      end
      fab!(:topic3) do
        Fabricate(:topic, category: category, created_at: 1.day.ago, bumped_at: 1.day.ago)
      end
      fab!(:welcome_topic) { Fabricate(:topic) }
      fab!(:post) { Fabricate(:post, topic: welcome_topic) }

      before do
        SiteSetting.desktop_category_page_style = "categories_and_latest_topics"
        SiteSetting.welcome_topic_id = welcome_topic.id
        SiteSetting.editing_grace_period = 1.minute.to_i
        SiteSetting.bootstrap_mode_enabled = true
      end

      it "is hidden for non-admins" do
        get "/categories_and_latest.json"
        expect(response.status).to eq(200)
        expect(response.parsed_body["topic_list"]["topics"].map { |t| t["id"] }).not_to include(
          welcome_topic.id,
        )
      end

      it "is shown to non-admins when there is an edit" do
        post.revise(post.user, { raw: "#{post.raw}2" }, revised_at: post.updated_at + 2.minutes)
        post.reload
        expect(post.version).to eq(2)

        get "/categories_and_latest.json"
        expect(response.status).to eq(200)
        expect(response.parsed_body["topic_list"]["topics"].map { |t| t["id"] }).to include(
          welcome_topic.id,
        )
      end

      it "is hidden to admins" do
        sign_in(admin)

        get "/categories_and_latest.json"
        expect(response.status).to eq(200)
        expect(response.parsed_body["topic_list"]["topics"].map { |t| t["id"] }).not_to include(
          welcome_topic.id,
        )
      end

      it "is shown to users when bootstrap mode is disabled" do
        SiteSetting.bootstrap_mode_enabled = false

        get "/categories_and_latest.json"
        expect(response.status).to eq(200)
        expect(response.parsed_body["topic_list"]["topics"].map { |t| t["id"] }).to include(
          welcome_topic.id,
        )
      end
    end

    it "includes subcategories and topics by default when view is subcategories_with_featured_topics" do
      SiteSetting.max_category_nesting = 3
      subcategory = Fabricate(:category, user: admin, parent_category: category)

      topic1 = Fabricate(:topic, category: category)
      CategoryFeaturedTopic.feature_topics

      SiteSetting.desktop_category_page_style = "subcategories_with_featured_topics"
      get "/categories.json"
      expect(response.status).to eq(200)

      category_list = response.parsed_body["category_list"]

      category_response = category_list["categories"].find { |c| c["id"] == category.id }
      expect(category_response["topics"].map { |c| c["id"] }).to contain_exactly(topic1.id)

      expect(category_response["subcategory_list"][0]["id"]).to eq(subcategory.id)
    end

    it "does not result in N+1 queries problem with multiple topics" do
      category1 = Fabricate(:category)
      category2 = Fabricate(:category)
      upload = Fabricate(:upload)
      topic1 = Fabricate(:topic, category: category1)
      topic2 = Fabricate(:topic, category: category1, image_upload: upload)

      CategoryFeaturedTopic.feature_topics
      SiteSetting.desktop_category_page_style = "categories_with_featured_topics"

      # warmup
      get "/categories.json"
      expect(response.status).to eq(200)

      first_request_queries =
        track_sql_queries do
          get "/categories.json"
          expect(response.status).to eq(200)
        end

      category_response =
        response.parsed_body["category_list"]["categories"].find { |c| c["id"] == category1.id }
      expect(category_response["topics"].count).to eq(2)

      upload = Fabricate(:upload)
      topic3 = Fabricate(:topic, category: category2, image_upload: upload)
      CategoryFeaturedTopic.feature_topics

      second_request_queries =
        track_sql_queries do
          get "/categories.json"
          expect(response.status).to eq(200)
        end

      category1_response =
        response.parsed_body["category_list"]["categories"].find { |c| c["id"] == category1.id }
      category2_response =
        response.parsed_body["category_list"]["categories"].find { |c| c["id"] == category2.id }
      expect(category1_response["topics"].size).to eq(2)
      expect(category2_response["topics"].size).to eq(1)

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

    it "does not show uncategorized unless allow_uncategorized_topics" do
      SiteSetting.desktop_category_page_style = "categories_boxes_with_topics"

      uncategorized = Category.find(SiteSetting.uncategorized_category_id)
      Fabricate(:topic, category: uncategorized)
      CategoryFeaturedTopic.feature_topics

      SiteSetting.allow_uncategorized_topics = false

      get "/categories.json"
      expect(
        response.parsed_body["category_list"]["categories"].map { |x| x["id"] },
      ).not_to include(uncategorized.id)
    end
  end

  describe "extensibility event" do
    before { sign_in(admin) }

    it "triggers a extensibility event" do
      event =
        DiscourseEvent
          .track_events do
            put "/categories/#{category.id}.json",
                params: {
                  name: "hello",
                  color: "ff0",
                  text_color: "fff",
                }
          end
          .last

      expect(event[:event_name]).to eq(:category_updated)
      expect(event[:params].first).to eq(category)
    end
  end

  describe "#create" do
    it "requires the user to be logged in" do
      post "/categories.json"
      expect(response.status).to eq(403)
    end

    describe "logged in" do
      before do
        Jobs.run_immediately!
        sign_in(admin)
      end

      it "raises an exception when they don't have permission to create it" do
        sign_in(Fabricate(:user))
        post "/categories.json", params: { name: "hello", color: "ff0", text_color: "fff" }

        expect(response).to be_forbidden
      end

      it "raises an exception when the name is missing" do
        post "/categories.json", params: { color: "ff0", text_color: "fff" }
        expect(response.status).to eq(400)
      end

      describe "failure" do
        it "returns errors on a duplicate category name" do
          category = Fabricate(:category, user: admin)

          post "/categories.json", params: { name: category.name, color: "ff0", text_color: "fff" }

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

        it "returns errors with invalid group" do
          category = Fabricate(:category, user: admin)
          readonly = CategoryGroup.permission_types[:readonly]

          post "/categories.json",
               params: {
                 name: category.name,
                 color: "ff0",
                 text_color: "fff",
                 permissions: {
                   "invalid_group" => readonly,
                 },
               }

          expect(response.status).to eq(422)
          expect(response.parsed_body["errors"]).to be_present
        end
      end

      describe "success" do
        it "works" do
          SiteSetting.enable_category_group_moderation = true

          readonly = CategoryGroup.permission_types[:readonly]
          create_post = CategoryGroup.permission_types[:create_post]
          group = Fabricate(:group)

          post "/categories.json",
               params: {
                 name: "hello",
                 color: "ff0",
                 text_color: "fff",
                 slug: "hello-cat",
                 auto_close_hours: 72,
                 search_priority: Searchable::PRIORITIES[:ignore],
                 reviewable_by_group_name: group.name,
                 permissions: {
                   "everyone" => readonly,
                   "staff" => create_post,
                 },
               }

          expect(response.status).to eq(200)
          cat_json = response.parsed_body["category"]
          expect(cat_json).to be_present
          expect(cat_json["reviewable_by_group_name"]).to eq(group.name)
          expect(cat_json["name"]).to eq("hello")
          expect(cat_json["slug"]).to eq("hello-cat")
          expect(cat_json["color"]).to eq("ff0")
          expect(cat_json["auto_close_hours"]).to eq(72)
          expect(cat_json["search_priority"]).to eq(Searchable::PRIORITIES[:ignore])

          category = Category.find(cat_json["id"])
          expect(category.category_groups.map { |g| [g.group_id, g.permission_type] }.sort).to eq(
            [[Group[:everyone].id, readonly], [Group[:staff].id, create_post]],
          )
          expect(UserHistory.count).to eq(4) # 1 + 3 (bootstrap mode)
        end
      end
    end
  end

  describe "#show" do
    before do
      category.set_permissions(admins: :full)
      category.save!
    end

    it "requires the user to be logged in" do
      get "/c/#{category.id}/show.json"
      expect(response.status).to eq(403)
    end

    describe "logged in" do
      it "raises an exception if they don't have permission to see it" do
        admin.update!(admin: false, group_users: [])
        sign_in(admin)
        get "/c/#{category.id}/show.json"
        expect(response.status).to eq(403)
      end

      it "renders category for users that have permission" do
        sign_in(admin)
        get "/c/#{category.id}/show.json"
        expect(response.status).to eq(200)
      end
    end
  end

  describe "#destroy" do
    it "requires the user to be logged in" do
      delete "/categories/category.json"
      expect(response.status).to eq(403)
    end

    describe "logged in" do
      it "raises an exception if they don't have permission to delete it" do
        admin.update!(admin: false)
        sign_in(admin)
        delete "/categories/#{category.slug}.json"
        expect(response).to be_forbidden
      end

      it "deletes the record" do
        sign_in(admin)

        id = Fabricate(:topic_timer, category: category).id

        expect do delete "/categories/#{category.slug}.json" end.to change(Category, :count).by(-1)
        expect(response.status).to eq(200)
        expect(UserHistory.count).to eq(1)
        expect(TopicTimer.where(id: id).exists?).to eq(false)
      end
    end
  end

  describe "#reorder" do
    it "reorders the categories" do
      sign_in(admin)

      c1 = category
      c2 = Fabricate(:category)
      c3 = Fabricate(:category)
      c4 = Fabricate(:category)
      if c3.id < c2.id
        tmp = c3
        c2 = c3
        c3 = tmp
      end
      c1.position = 8
      c2.position = 6
      c3.position = 7
      c4.position = 5

      payload = {}
      payload[c1.id] = 4
      payload[c2.id] = 6
      payload[c3.id] = 6
      payload[c4.id] = 5

      post "/categories/reorder.json", params: { mapping: MultiJson.dump(payload) }

      SiteSetting.fixed_category_positions = true
      list = CategoryList.new(Guardian.new(admin))

      expect(list.categories).to eq(
        [Category.find(SiteSetting.uncategorized_category_id), c1, c4, c2, c3],
      )
    end
  end

  describe "#update" do
    before { Jobs.run_immediately! }

    it "requires the user to be logged in" do
      put "/categories/category.json"
      expect(response.status).to eq(403)
    end

    describe "logged in" do
      before { sign_in(admin) }

      it "raises an exception if they don't have permission to edit it" do
        sign_in(Fabricate(:user))
        put "/categories/#{category.slug}.json",
            params: {
              name: "hello",
              color: "ff0",
              text_color: "fff",
            }
        expect(response).to be_forbidden
      end

      it "returns errors on a duplicate category name" do
        other_category = Fabricate(:category, name: "Other", user: admin)
        put "/categories/#{category.id}.json",
            params: {
              name: other_category.name,
              color: "ff0",
              text_color: "fff",
            }
        expect(response.status).to eq(422)
      end

      it "returns errors when there is a name conflict while moving a category into another" do
        parent_category = Fabricate(:category, name: "Parent", user: admin)
        other_category =
          Fabricate(
            :category,
            name: category.name,
            user: admin,
            parent_category: parent_category,
            slug: "a-different-slug",
          )

        put "/categories/#{category.id}.json", params: { parent_category_id: parent_category.id }

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

      it "returns 422 if email_in address is already in use for other category" do
        _other_category = Fabricate(:category, name: "Other", email_in: "mail@example.com")

        put "/categories/#{category.id}.json",
            params: {
              name: "Email",
              email_in: "mail@example.com",
              color: "ff0",
              text_color: "fff",
            }
        expect(response.status).to eq(422)
      end

      describe "success" do
        it "updates attributes correctly" do
          SiteSetting.tagging_enabled = true
          readonly = CategoryGroup.permission_types[:readonly]
          create_post = CategoryGroup.permission_types[:create_post]
          tag_group = Fabricate(:tag_group)

          put "/categories/#{category.id}.json",
              params: {
                name: "hello",
                color: "ff0",
                text_color: "fff",
                slug: "hello-category",
                auto_close_hours: 72,
                permissions: {
                  "everyone" => readonly,
                  "staff" => create_post,
                },
                custom_fields: {
                  "dancing" => "frogs",
                  "running" => %w[turtle salamander],
                },
                minimum_required_tags: "",
                allow_global_tags: "true",
                required_tag_groups: [{ name: tag_group.name, min_count: 2 }],
              }

          expect(response.status).to eq(200)
          category.reload
          expect(category.category_groups.map { |g| [g.group_id, g.permission_type] }.sort).to eq(
            [[Group[:everyone].id, readonly], [Group[:staff].id, create_post]],
          )
          expect(category.name).to eq("hello")
          expect(category.slug).to eq("hello-category")
          expect(category.color).to eq("ff0")
          expect(category.auto_close_hours).to eq(72)
          expect(category.custom_fields).to eq(
            "dancing" => "frogs",
            "running" => %w[turtle salamander],
          )
          expect(category.minimum_required_tags).to eq(0)
          expect(category.allow_global_tags).to eq(true)
          expect(category.category_required_tag_groups.count).to eq(1)
          expect(category.category_required_tag_groups.first.tag_group.id).to eq(tag_group.id)
          expect(category.category_required_tag_groups.first.min_count).to eq(2)
        end

        it "logs the changes correctly" do
          category.update!(
            permissions: {
              "admins" => CategoryGroup.permission_types[:create_post],
            },
          )

          put "/categories/#{category.id}.json",
              params: {
                name: "new name",
                color: category.color,
                text_color: category.text_color,
                slug: category.slug,
                permissions: {
                  "everyone" => CategoryGroup.permission_types[:create_post],
                },
              }
          expect(response.status).to eq(200)
          expect(UserHistory.count).to eq(5) # 2 + 3 (bootstrap mode)
        end

        it "updates per-category settings correctly" do
          category.custom_fields[Category::REQUIRE_TOPIC_APPROVAL] = false
          category.custom_fields[Category::REQUIRE_REPLY_APPROVAL] = false
          category.custom_fields[Category::NUM_AUTO_BUMP_DAILY] = 0

          category.navigate_to_first_post_after_read = false
          category.save!

          put "/categories/#{category.id}.json",
              params: {
                name: category.name,
                color: category.color,
                text_color: category.text_color,
                navigate_to_first_post_after_read: true,
                custom_fields: {
                  require_reply_approval: true,
                  require_topic_approval: true,
                  num_auto_bump_daily: 10,
                },
              }

          category.reload
          expect(category.require_topic_approval?).to eq(true)
          expect(category.require_reply_approval?).to eq(true)
          expect(category.num_auto_bump_daily).to eq(10)
          expect(category.navigate_to_first_post_after_read).to eq(true)
        end

        it "can remove required tag group" do
          SiteSetting.tagging_enabled = true
          category.update!(
            category_required_tag_groups: [
              CategoryRequiredTagGroup.new(tag_group: Fabricate(:tag_group)),
            ],
          )
          put "/categories/#{category.id}.json",
              params: {
                name: category.name,
                color: category.color,
                text_color: category.text_color,
                allow_global_tags: "false",
                min_tags_from_required_group: 1,
                required_tag_groups: [],
              }

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

        it "does not update other fields" do
          SiteSetting.tagging_enabled = true
          tag_group_1 = Fabricate(:tag_group)
          tag_group_2 = Fabricate(:tag_group)

          category.update!(
            allowed_tags: %w[hello world],
            allowed_tag_groups: [tag_group_1.name],
            category_required_tag_groups: [CategoryRequiredTagGroup.new(tag_group: tag_group_2)],
            custom_fields: {
              field_1: "hello",
              field_2: "hello",
            },
          )

          put "/categories/#{category.id}.json"
          expect(response.status).to eq(200)
          category.reload
          expect(category.tags.pluck(:name)).to contain_exactly("hello", "world")
          expect(category.tag_groups.pluck(:name)).to contain_exactly(tag_group_1.name)
          expect(category.category_required_tag_groups.first.tag_group).to eq(tag_group_2)
          expect(category.custom_fields).to eq({ "field_1" => "hello", "field_2" => "hello" })

          put "/categories/#{category.id}.json",
              params: {
                allowed_tags: [],
                custom_fields: {
                  field_1: nil,
                },
              }
          expect(response.status).to eq(200)
          category.reload
          expect(category.tags).to be_blank
          expect(category.tag_groups.pluck(:name)).to contain_exactly(tag_group_1.name)
          expect(category.category_required_tag_groups.first.tag_group).to eq(tag_group_2)
          expect(category.custom_fields).to eq({ "field_2" => "hello" })

          put "/categories/#{category.id}.json",
              params: {
                allowed_tags: [],
                allowed_tag_groups: [],
                required_tag_groups: [],
                custom_fields: {
                  field_1: "hi",
                  field_2: nil,
                },
              }
          expect(response.status).to eq(200)
          category.reload
          expect(category.tags).to be_blank
          expect(category.tag_groups).to be_blank
          expect(category.category_required_tag_groups).to eq([])
          expect(category.custom_fields).to eq({ "field_1" => "hi" })
        end
      end
    end
  end

  describe "#update_slug" do
    it "requires the user to be logged in" do
      put "/category/category/slug.json"
      expect(response.status).to eq(403)
    end

    describe "logged in" do
      before { sign_in(admin) }

      it "rejects blank" do
        put "/category/#{category.id}/slug.json", params: { slug: "   " }
        expect(response.status).to eq(422)
        expect(response.parsed_body["errors"]).to eq(["Slug can't be blank"])
      end

      it "accepts valid custom slug" do
        put "/category/#{category.id}/slug.json", params: { slug: "valid-slug" }

        expect(response.status).to eq(200)
        expect(category.reload.slug).to eq("valid-slug")
      end

      it "accepts not well formed custom slug" do
        put "/category/#{category.id}/slug.json", params: { slug: " valid slug" }

        expect(response.status).to eq(200)
        expect(category.reload.slug).to eq("valid-slug")
      end

      it "accepts and sanitize custom slug when the slug generation method is not ascii" do
        SiteSetting.slug_generation_method = "none"
        put "/category/#{category.id}/slug.json", params: { slug: " another !_ slug @" }

        expect(response.status).to eq(200)
        expect(category.reload.slug).to eq("another-slug")
        SiteSetting.slug_generation_method = "ascii"
      end

      it "rejects invalid custom slug" do
        put "/category/#{category.id}/slug.json", params: { slug: "." }
        expect(response.status).to eq(422)
        expect(response.parsed_body["errors"]).to eq(["Slug is invalid"])
      end
    end
  end

  describe "#categories_and_topics" do
    before { 10.times.each { Fabricate(:topic) } }

    it "works when SiteSetting.categories_topics is non-null" do
      SiteSetting.categories_topics = 5

      get "/categories_and_latest.json"
      expect(response.parsed_body["topic_list"]["topics"].size).to eq(5)
    end

    it "works when SiteSetting.categories_topics is null" do
      SiteSetting.categories_topics = 0

      get "/categories_and_latest.json"
      json = response.parsed_body

      category_list = json["category_list"]
      topic_list = json["topic_list"]

      expect(category_list["categories"].size).to eq(2) # 'Uncategorized' and category
      expect(topic_list["topics"].size).to eq(5)

      Fabricate(:category, parent_category: category)

      get "/categories_and_latest.json"
      json = response.parsed_body
      expect(json["category_list"]["categories"].size).to eq(2)
      expect(json["topic_list"]["topics"].size).to eq(5)

      Fabricate(:category)
      Fabricate(:category)

      get "/categories_and_latest.json"
      json = response.parsed_body
      expect(json["category_list"]["categories"].size).to eq(4)
      expect(json["topic_list"]["topics"].size).to eq(6)
    end

    it "does not show uncategorized unless allow_uncategorized_topics" do
      uncategorized = Category.find(SiteSetting.uncategorized_category_id)
      Fabricate(:topic, category: uncategorized)
      CategoryFeaturedTopic.feature_topics

      SiteSetting.allow_uncategorized_topics = false

      get "/categories_and_latest.json"
      expect(
        response.parsed_body["category_list"]["categories"].map { |x| x["id"] },
      ).not_to include(uncategorized.id)
    end

    describe "Showing top topics from private categories" do
      it "returns the top topic from the private category when the user is a member" do
        restricted_group = Fabricate(:group)
        private_cat = Fabricate(:private_category, group: restricted_group)
        private_topic = Fabricate(:topic, category: private_cat, like_count: 1000, posts_count: 100)
        TopTopic.refresh!
        restricted_group.add(user)
        sign_in(user)

        get "/categories_and_top.json"
        parsed_topic =
          response
            .parsed_body
            .dig("topic_list", "topics")
            .detect { |t| t.dig("id") == private_topic.id }

        expect(parsed_topic).to be_present
      end
    end
  end

  describe "#visible_groups" do
    fab!(:public_group) do
      Fabricate(:group, visibility_level: Group.visibility_levels[:public], name: "aaa")
    end
    fab!(:private_group) do
      Fabricate(:group, visibility_level: Group.visibility_levels[:staff], name: "bbb")
    end
    fab!(:user_only_group) do
      Fabricate(:group, visibility_level: Group.visibility_levels[:members], name: "ccc")
    end

    it "responds with 404 when id param is invalid" do
      get "/c/-9999/visible_groups.json"

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

    it "responds with 403 when category is restricted to the current user" do
      category.set_permissions(private_group.name => :full)
      category.save!

      get "/c/#{category.id}/visible_groups.json"

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

    it "returns the names of the groups that are visible to an admin" do
      sign_in(admin)

      category.set_permissions(
        private_group.name => :full,
        public_group.name => :full,
        user_only_group.name => :full,
      )

      category.save!

      get "/c/#{category.id}/visible_groups.json"

      expect(response.status).to eq(200)
      expect(response.parsed_body["groups"]).to eq(
        [public_group.name, private_group.name, user_only_group.name],
      )
    end

    it "returns the names of the groups that are visible to a user and excludes the everyone group" do
      private_group.add(user)
      sign_in(user)

      category.set_permissions(
        private_group.name => :full,
        public_group.name => :full,
        user_only_group.name => :full,
      )

      category.save!

      get "/c/#{category.id}/visible_groups.json"

      expect(response.status).to eq(200)
      expect(response.parsed_body["groups"]).to eq([public_group.name])
    end

    it "returns no groups if everyone can see it" do
      sign_in(user)

      category.set_permissions(
        "everyone" => :readonly,
        private_group.name => :full,
        public_group.name => :full,
        user_only_group.name => :full,
      )

      category.save!

      get "/c/#{category.id}/visible_groups.json"

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