#399

backend/app/representations/post_repr.rb

@@ -18,7 +18,12 @@ module PostRepr
   module_function
 
   def base post, current_user = nil, host: nil
-    json = common(post, host:)
+    json =
+        if host.present?
+          common(post, host:)
+        else
+          common(post)
+        end
     json['tags'] = tag_json(post)
     json['uploaded_user'] = post.uploaded_user && UserRepr.base(post.uploaded_user)
     json['viewed'] = current_user ? current_user.viewed?(post) : false
@@ -27,6 +32,7 @@ module PostRepr
 
   def detail post, current_user = nil, parent_posts: [], child_posts: [],
              sibling_posts: { }, related: [], host: nil
+    if host.present?
       base(post, current_user, host:).merge(
           'parent_posts' => cards(parent_posts, host:),
           'child_posts' => cards(child_posts, host:),
@@ -34,23 +40,50 @@ module PostRepr
             cards(posts, host:)
           },
           'related' => cards(related, host:))
+    else
+      base(post, current_user).merge(
+          'parent_posts' => cards(parent_posts),
+          'child_posts' => cards(child_posts),
+          'sibling_posts' => sibling_posts.transform_keys(&:to_s).transform_values { |posts|
+            cards(posts)
+          },
+          'related' => cards(related))
+    end
   end
 
   def card post, host: nil
+    if host.present?
       common(post, host:).merge('parent_posts' => [], 'child_posts' => [])
+    else
+      common(post).merge('parent_posts' => [], 'child_posts' => [])
+    end
   end
 
   def cards posts, host: nil
+    if host.present?
       posts.map { |post| card(post, host:) }
+    else
+      posts.map { |post| card(post) }
+    end
   end
 
   def many posts, current_user = nil, host: nil
+    if host.present?
       posts.map { |p| base(p, current_user, host:) }
+    else
+      posts.map { |p| base(p, current_user) }
+    end
   end
 
   def common post, host: nil
     BASE_FIELDS.to_h { |field| [field.to_s, post.public_send(field)] }
-               .merge('thumbnail' => thumbnail_url(post, host:))
+               .merge(
+                   'thumbnail' =>
+                       if host.present?
+                         thumbnail_url(post, host:)
+                       else
+                         thumbnail_url(post)
+                       end)
   end
 
   def tag_json post
@@ -68,10 +101,10 @@ module PostRepr
   def thumbnail_url post, host: nil
     return nil unless post.thumbnail.attached?
 
-    Rails.application.routes.url_helpers.rails_storage_proxy_url(
+    options = { only_path: false }
-        post.thumbnail,
+    options[:host] = host if host.present?
-        only_path: false,
+
-        host:)
+    Rails.application.routes.url_helpers.rails_storage_proxy_url(post.thumbnail, **options)
   rescue ActionController::UrlGenerationError, ArgumentError, URI::InvalidURIError => e
     Rails.logger.warn(
         "PostRepr.thumbnail_url failed post_id=#{post.id} " \