#399

backend/app/controllers/posts_controller.rb

@@ -115,7 +115,7 @@ class PostsController < ApplicationController
     render json: PostRepr.base(post, current_user)
   end
 
-  def preview
+  def metadata
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
     return render_bad_request('URL は必須です．') if params[:url].blank?
@@ -128,6 +128,7 @@ class PostsController < ApplicationController
             provenance: { },
             tag_sources: { } }],
         fetch_metadata: true).first
+    return render_validation_error fields: preview[:validation_errors] if preview[:validation_errors].present?
 
     render json: {
         url: preview[:url],
@@ -140,7 +141,6 @@ class PostsController < ApplicationController
         video_ms: preview[:attributes]['video_ms'],
         field_warnings: preview[:field_warnings],
         base_warnings: preview[:base_warnings],
-        validation_errors: preview[:validation_errors],
         existing_post: compact_post(preview[:existing_post_id]) }
   rescue ArgumentError => e
     render_bad_request e.message
@@ -178,6 +178,11 @@ class PostsController < ApplicationController
         attributes: post_create_attributes,
         thumbnail: params[:thumbnail]).run
     return render json: dry_run_json(preflight) if bool?(:dry)
+    if preflight[:existing_post].present?
+      post = Post.new(url: preflight[:url])
+      post.errors.add :url, :taken
+      return render_post_form_record_invalid post
+    end
 
     post = PostCreator.new(actor: current_user,
                            attributes: post_create_attributes.merge(
@@ -191,7 +196,10 @@ class PostsController < ApplicationController
                                    :original_created_before,
                                    :duration,
                                    :video_ms,
-                                   :normalised_tags,
+                                   :direct_tag_specs,
+                                   :default_tag_specs,
+                                   :snapshot_tag_specs,
+                                   :post_tag_specs,
                                    :tag_sections,
                                    :normalised_parent_post_ids).symbolize_keys).merge(
                                thumbnail: params[:thumbnail])).create!