#434

backend/app/controllers/concerns/counts_listing.rb

@@ -0,0 +1,19 @@
+module CountsListing
+  extend ActiveSupport::Concern
+
+  def index
+    locale = resolve_locale!
+    resource = is_a?(CountsPostsController) ? 'posts' : 'tags'
+    query = CountsQuery.new(version_scope, resource, request.query_parameters.except('locale')
+        .merge('locale' => locale.code))
+    result = { count: query.count, page: query.page, limit: query.limit }
+    if query.mode == 'summary'
+      result.merge!(query.summary)
+    else
+      result[:versions] = serialise_versions(query.details(version_scope), locale.language_code)
+    end
+    render json: result
+  rescue ArgumentError, TypeError
+    head :bad_request
+  end
+end

backend/app/controllers/counts_posts_controller.rb

@@ -0,0 +1,3 @@
+class CountsPostsController < PostVersionsController
+  include CountsListing
+end

backend/app/controllers/counts_tags_controller.rb

@@ -0,0 +1,3 @@
+class CountsTagsController < TagVersionsController
+  include CountsListing
+end

backend/app/controllers/post_versions_controller.rb

@@ -14,21 +14,7 @@ class PostVersionsController < ApplicationController
 
     offset = (page - 1) * limit
 
-    q = PostVersion.joins(<<~SQL.squish)
-          LEFT JOIN
-            post_versions prev
-            ON
-              prev.post_id = post_versions.post_id
-              AND prev.version_no = post_versions.version_no - 1
-        SQL
-        .select('post_versions.*',
-                'prev.title AS prev_title',
-                'prev.url AS prev_url',
-                'prev.thumbnail_base AS prev_thumbnail_base',
-                'prev.tags_json AS prev_tags_json',
-                'prev.video_ms AS prev_video_ms',
-                'prev.original_created_from AS prev_original_created_from',
-                'prev.original_created_before AS prev_original_created_before')
+    q = version_scope
     q = q.where('post_versions.post_id = ?', post_id) if post_id
     if external_tag_id || (tag_id && !(Tag.exists?(id: tag_id)))
       q = q.where('JSON_CONTAINS(post_versions.tags_json,' +
@@ -51,6 +37,24 @@ class PostVersionsController < ApplicationController
 
   private
 
+  def version_scope
+    PostVersion.joins(<<~SQL.squish)
+          LEFT JOIN
+            post_versions prev
+            ON
+              prev.post_id = post_versions.post_id
+              AND prev.version_no = post_versions.version_no - 1
+        SQL
+        .select('post_versions.*',
+                'prev.title AS prev_title',
+                'prev.url AS prev_url',
+                'prev.thumbnail_base AS prev_thumbnail_base',
+                'prev.tags_json AS prev_tags_json',
+                'prev.video_ms AS prev_video_ms',
+                'prev.original_created_from AS prev_original_created_from',
+                'prev.original_created_before AS prev_original_created_before')
+  end
+
   def serialise_versions rows, language_code
     rows = rows.to_a
     user_ids = rows.map(&:created_by_user_id).compact.uniq

backend/app/controllers/tag_versions_controller.rb

@@ -10,17 +10,7 @@ class TagVersionsController < ApplicationController
 
     offset = (page - 1) * limit
 
-    q = TagVersion.joins(<<~SQL.squish)
-          LEFT JOIN
-            tag_versions prev
-            ON
-              prev.tag_id = tag_versions.tag_id
-              AND prev.version_no = tag_versions.version_no - 1
-        SQL
-      .select('tag_versions.*', 'prev.name AS prev_name', 'prev.category AS prev_category',
-              'prev.deprecated_at AS prev_deprecated_at',
-              'prev.aliases AS prev_aliases', 'prev.names AS prev_names',
-              'prev.parent_tag_ids AS prev_parent_tag_ids')
+    q = version_scope
     q = q.where('tag_versions.tag_id = ?', tag_id) if tag_id
 
     count = q.except(:select, :order, :limit, :offset).count
@@ -34,6 +24,20 @@ class TagVersionsController < ApplicationController
 
   private
 
+  def version_scope
+    TagVersion.joins(<<~SQL.squish)
+          LEFT JOIN
+            tag_versions prev
+            ON
+              prev.tag_id = tag_versions.tag_id
+              AND prev.version_no = tag_versions.version_no - 1
+        SQL
+      .select('tag_versions.*', 'prev.name AS prev_name', 'prev.category AS prev_category',
+              'prev.deprecated_at AS prev_deprecated_at',
+              'prev.aliases AS prev_aliases', 'prev.names AS prev_names',
+              'prev.parent_tag_ids AS prev_parent_tag_ids')
+  end
+
   def serialise_versions rows, language_code
     rows = rows.to_a
     tag_ids = rows.map(&:tag_id).uniq