#428

backend/app/controllers/wiki_pages_controller.rb

@@ -34,6 +34,34 @@ class WikiPagesController < ApplicationController
     render json:
   end
 
+  def autolink_candidates
+    locale = resolve_locale!
+    language = params.fetch(:language, locale.language_code)
+    return head :not_found unless language.is_a?(String)
+    target_locale =
+        if language == 'und'
+          locale
+        else
+          Locale.where(language_code: language, deprecated_at: nil,
+                       code: Locale.codes.values).order(:code).first
+        end
+    return head :not_found unless target_locale
+
+    candidates = []
+    unless language == 'und'
+      names = TagDescription.joins(tag: :tag_names)
+          .where(language_code: language, tag_names: { language_code: language })
+          .pluck('tag_descriptions.tag_id', 'tag_descriptions.id', 'tag_names.name')
+      candidates = names.map do |tag_id, description_id, name|
+        WikiPageRepr.autolink_tag(target_locale, tag_id:, description_id:, name:)
+      end
+    end
+    candidates.concat(TagGroup.order(:id).pluck(:id, :name).map do |id, name|
+      WikiPageRepr.autolink_group(target_locale, id:, name:, language:)
+    end)
+    render json: candidates
+  end
+
   def show
     locale = resolve_locale!
     tag_description = TagDescription.find_by(id: params[:id], language_code: locale.language_code)

backend/app/representations/wiki_page_repr.rb

@@ -9,6 +9,8 @@ module WikiPageRepr
 
     { 'id' => description.id,
       'resource_type' => 'tag_description',
+      'tag_id' => tag.id,
+      'language_code' => description.language_code,
       'tag_name_id' => tag.tag_name(locale.language_code)&.id,
       'body' => description.body,
       'created_user_id' => description.created_by_user_id,
@@ -24,4 +26,24 @@ module WikiPageRepr
   def tag_group tag_group
     TagGroupRepr.tag_group(tag_group).merge('resource_type' => 'tag_group')
   end
+
+  def autolink_tag locale, tag_id:, description_id:, name:
+    { resource_type: 'tag_description',
+      resource_id: description_id,
+      tag_id:,
+      tag_description_id: description_id,
+      name:,
+      language_code: locale.language_code,
+      locale_code: locale.code_before_type_cast }
+  end
+
+  def autolink_group locale, id:, name:, language:
+    { resource_type: 'tag_group',
+      resource_id: id,
+      tag_id: nil,
+      tag_description_id: nil,
+      name: "#{ TagGroupRepr::PREFIX }#{ name }",
+      language_code: language,
+      locale_code: locale.code_before_type_cast }
+  end
 end

backend/config/routes.rb

@@ -45,6 +45,7 @@ Rails.application.routes.draw do
     collection do
       get :search, action: :index
       get :changes
+      get :autolink_candidates
 
       scope :title do
         get ':title/exists', action: :exists_by_title