#399

backend/app/services/post_creator.rb

@@ -1,9 +1,12 @@
 class PostCreator
   class VideoMsParseError < ArgumentError; end
 
+  attr_reader :field_warnings
+
   def initialize actor:, attributes:
     @actor = actor
     @attributes = attributes.symbolize_keys
+    @field_warnings = { }
   end
 
   def create!
@@ -13,8 +16,7 @@ class PostCreator
                     uploaded_user: @actor,
                     original_created_from: @attributes[:original_created_from].presence,
                     original_created_before: @attributes[:original_created_before].presence)
-    thumbnail = @attributes[:thumbnail]
-    post.thumbnail.attach(Post.resized_thumbnail_attachment(thumbnail)) if thumbnail.present?
+    attach_thumbnail!(post)
 
     ApplicationRecord.transaction do
       post.save!
@@ -34,6 +36,21 @@ class PostCreator
 
   private
 
+  def attach_thumbnail! post
+    thumbnail = @attributes[:thumbnail]
+    if thumbnail.present?
+      post.thumbnail.attach(Post.resized_thumbnail_attachment(thumbnail))
+      return
+    end
+
+    thumbnail_base = post.thumbnail_base
+    return if thumbnail_base.blank?
+
+    post.attach_thumbnail_from_url!(thumbnail_base)
+  rescue Post::RemoteThumbnailFetchFailed => e
+    @field_warnings[:thumbnail_base] = [e.message]
+  end
+
   def tag_names = @attributes[:tags].to_s.split
 
   def parent_post_ids