#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)