Add support for Japanese all-entity search

app/controllers/api/v1/search_controller.rb

@@ -3,32 +3,49 @@
 module Api
   module V1
     class SearchController < Api::V1::ApiController
-      def all
+      TRIGRAM = {
-        trigram = {
         trigram: {
           threshold: 0.3
         }
-        }
+      }.freeze
 
-        tsearch = {
+      TSEARCH_WITH_PREFIX = {
         tsearch: {
           prefix: true,
           dictionary: 'simple'
         }
-        }
+      }.freeze
 
+      def all
+        locale = search_params[:locale] || 'en'
 
-        PgSearch.multisearch_options = { using: trigram }
+        case locale
-        results = PgSearch.multisearch(search_params[:query]).limit(10)
+        when 'en'
-
+          results = search_all_en
-        if (results.length < 5) && (search_params[:query].length >= 2)
+        when 'ja'
-          PgSearch.multisearch_options = { using: tsearch }
+          results = search_all_ja
-          results = PgSearch.multisearch(search_params[:query], { using: tsearch }).limit(10)
         end
 
         render json: SearchBlueprint.render(results, root: :results)
       end
 
+      def search_all_en
+        PgSearch.multisearch_options = { using: TRIGRAM }
+        results = PgSearch.multisearch(search_params[:query]).limit(10)
+
+        if (results.length < 5) && (search_params[:query].length >= 2)
+          PgSearch.multisearch_options = { using: TSEARCH_WITH_PREFIX }
+          results = PgSearch.multisearch(search_params[:query]).limit(10)
+        end
+
+        results
+      end
+
+      def search_all_ja
+        PgSearch.multisearch_options = { using: TSEARCH_WITH_PREFIX }
+        PgSearch.multisearch(search_params[:query]).limit(10)
+      end
+
       def characters
         filters = search_params[:filters]
         locale = search_params[:locale] || 'en'