#399

backend/app/controllers/posts_controller.rb

@@ -131,6 +131,7 @@ class PostsController < ApplicationController
           title: nil,
           thumbnail_base: nil,
           tags: nil,
+          display_tags: [],
           original_created_from: nil,
           original_created_before: nil,
           duration: nil,
@@ -153,6 +154,7 @@ class PostsController < ApplicationController
         title: metadata[:title],
         thumbnail_base: metadata[:thumbnail_base],
         tags: metadata[:tags],
+        display_tags: metadata[:display_tags],
         original_created_from: metadata[:original_created_from],
         original_created_before: metadata[:original_created_before],
         duration: metadata[:duration],
@@ -173,6 +175,7 @@ class PostsController < ApplicationController
         title: nil,
         thumbnail_base: nil,
         tags: nil,
+        display_tags: [],
         original_created_from: nil,
         original_created_before: nil,
         duration: nil,
@@ -633,6 +636,7 @@ class PostsController < ApplicationController
         :title,
         :thumbnail_base,
         :tags,
+        :display_tags,
         :parent_post_ids,
         :original_created_from,
         :original_created_before,

backend/app/representations/post_compact_repr.rb

@@ -7,20 +7,13 @@ module PostCompactRepr
   def base post
     return nil if post.nil?
 
-    {
-        id: post.id,
-        title: post.title,
-        url: post.url,
-        thumbnail_url: thumbnail_url(post) }
-  end
-
-  def thumbnail_url post
-    return nil unless post.thumbnail.attached?
-
-    Rails.application.routes.url_helpers.rails_storage_proxy_url(
-        post.thumbnail,
-        only_path: false)
-  rescue ActionController::UrlGenerationError, ArgumentError, URI::InvalidURIError
-    nil
+    PostRepr
+        .common(post)
+        .slice(
+            'id',
+            'title',
+            'url',
+            'thumbnail',
+            'thumbnail_base')
   end
 end

backend/app/services/post_create_plan.rb

@@ -27,6 +27,7 @@ class PostCreatePlan
         original_created_from: @attributes[:original_created_from].presence,
         original_created_before: @attributes[:original_created_before].presence,
         tags: serialised_tags(direct_tag_specs, tag_sections),
+        display_tags: display_tags(direct_tag_specs, tag_sections),
         duration: @attributes[:duration].to_s,
         video_ms: video_ms,
         parent_post_ids: parent_post_ids.join(' '),
@@ -204,6 +205,15 @@ class PostCreatePlan
     }.sort.join(' ')
   end
 
+  def display_tags direct_tag_specs, tag_sections
+    direct_tag_specs.map { |spec|
+      {
+          name: spec[:name],
+          category: spec[:category].to_s,
+          section_literals: tag_sections[spec[:name]].to_a.map { Post.section_literal(_1) } }
+    }.sort_by { _1[:name] }
+  end
+
   def normalise_video_ms snapshot_tag_specs
     return nil unless snapshot_tag_specs.any? { _1[:name] == VIDEO_TAG_NAME }
 

backend/app/services/post_create_preflight.rb

@@ -29,6 +29,7 @@ class PostCreatePreflight
           original_created_before: preview[:attributes]['original_created_before'],
           duration: preview[:attributes]['duration'],
           video_ms: preview[:attributes]['video_ms'],
+          display_tags: preview[:display_tags] || [],
           field_warnings: final_field_warnings(preview[:field_warnings] || { }),
           base_warnings: preview[:base_warnings],
           existing_post_id: preview[:existing_post_id],
@@ -63,6 +64,7 @@ class PostCreatePreflight
         original_created_before: plan[:original_created_before],
         duration: plan[:duration],
         video_ms: plan[:video_ms],
+        display_tags: plan[:display_tags],
         direct_tag_specs: plan[:direct_tag_specs],
         default_tag_specs: plan[:default_tag_specs],
         snapshot_tag_specs: plan[:snapshot_tag_specs],

backend/app/services/post_metadata_fetcher.rb

@@ -32,6 +32,7 @@ class PostMetadataFetcher
       original_created_from: serialise_time(created_range&.first),
       original_created_before: serialise_time(created_range&.last),
       duration: serialise_duration(duration),
+      display_tags: display_tags(platform_tags),
       tags: platform_tags.join(' ') }
   end
 
@@ -42,6 +43,24 @@ class PostMetadataFetcher
     []
   end
 
+  def self.display_tags names
+    return [] if names.blank?
+
+    existing_tags =
+        Tag
+        .joins(:tag_name)
+        .where(tag_names: { name: names })
+        .index_by(&:name)
+
+    names.map { |name|
+      tag = existing_tags[name]
+      {
+          name: name,
+          category: (tag&.category || 'meta'),
+          section_literals: [] }
+    }
+  end
+
   def self.original_created_range value
     return nil if value.blank?
 
@@ -168,6 +187,7 @@ class PostMetadataFetcher
   end
 
   private_class_method :platform_tags,
+                       :display_tags,
                        :original_created_range,
                        :parse_timestamp_range,
                        :parse_nanoseconds,