discourse/script/import_scripts/base/lookup_container.rb

# frozen_string_literal: true

module ImportScripts
  class LookupContainer
    def initialize
      puts "Loading existing groups..."
      @groups = GroupCustomField.where(name: "import_id").pluck(:value, :group_id).to_h

      puts "Loading existing users..."
      @users = UserCustomField.where(name: "import_id").pluck(:value, :user_id).to_h

      puts "Loading existing categories..."
      @categories = CategoryCustomField.where(name: "import_id").pluck(:value, :category_id).to_h

      puts "Loading existing posts..."
      @posts = PostCustomField.where(name: "import_id").pluck(:value, :post_id).to_h

      puts "Loading existing topics..."
      @topics = {}
      Post
        .joins(:topic)
        .pluck("posts.id, posts.topic_id, posts.post_number, topics.slug")
        .each do |p|
          @topics[p[0]] = { topic_id: p[1], post_number: p[2], url: Post.url(p[3], p[1], p[2]) }
        end
    end

    # Get the Discourse Post id based on the id of the source record
    def post_id_from_imported_post_id(import_id)
      @posts[import_id] || @posts[import_id.to_s]
    end

    # Get the Discourse topic info (a hash) based on the id of the source record
    def topic_lookup_from_imported_post_id(import_id)
      post_id = post_id_from_imported_post_id(import_id)
      post_id ? @topics[post_id] : nil
    end

    # Get the Discourse Group id based on the id of the source group
    def group_id_from_imported_group_id(import_id)
      @groups[import_id] || @groups[import_id.to_s]
    end

    # Get the Discourse Group based on the id of the source group
    def find_group_by_import_id(import_id)
      GroupCustomField.where(name: "import_id", value: import_id.to_s).first.try(:group)
    end

    # Get the Discourse User id based on the id of the source user
    def user_id_from_imported_user_id(import_id)
      @users[import_id] || @users[import_id.to_s]
    end

    # Get the Discourse User based on the id of the source user
    def find_user_by_import_id(import_id)
      UserCustomField.where(name: "import_id", value: import_id.to_s).first.try(:user)
    end

    def find_username_by_import_id(import_id)
      user_id = user_id_from_imported_user_id(import_id)
      User.where(id: user_id).pick(:username) if user_id.present?
    end

    # Get the Discourse Category id based on the id of the source category
    def category_id_from_imported_category_id(import_id)
      @categories[import_id] || @categories[import_id.to_s]
    end

    def add_group(import_id, group)
      @groups[import_id.to_s] = group.id
    end

    def add_user(import_id, user)
      @users[import_id.to_s] = user.id
    end

    def add_category(import_id, category)
      @categories[import_id.to_s] = category.id
    end

    def add_post(import_id, post)
      @posts[import_id.to_s] = post.id
    end

    def add_topic(post)
      @topics[post.id] = { post_number: post.post_number, topic_id: post.topic_id, url: post.url }
    end

    def user_already_imported?(import_id)
      @users.has_key?(import_id) || @users.has_key?(import_id.to_s)
    end

    def post_already_imported?(import_id)
      @posts.has_key?(import_id) || @posts.has_key?(import_id.to_s)
    end
  end
end