StatusMessageController#create: respond 422 when aspect_ids are wrong

fixes #3862

closes #7742

Changelog.md

@@ -5,6 +5,7 @@
 ## Bug fixes
 * Prefill conversation form on contacts page only with mutual contacts [#7744](https://github.com/diaspora/diaspora/pull/7744)
 * Fix profiles sometimes not loading properly in background tabs [#7740](https://github.com/diaspora/diaspora/pull/7740)
+* Show error message when creating posts with invalid aspects [#7742](https://github.com/diaspora/diaspora/pull/7742)
 
 ## Features
 

app/controllers/status_messages_controller.rb

@@ -49,6 +49,8 @@ class StatusMessagesController < ApplicationController
       format.mobile { redirect_to stream_path }
       format.json { render json: PostPresenter.new(status_message, current_user), status: 201 }
     end
+  rescue StatusMessageCreationService::BadAspectsIDs
+    render status: 422, plain: I18n.t("status_messages.bad_aspects")
   rescue StandardError => error
     handle_create_error(error)
   end

app/services/status_message_creation_service.rb

@@ -9,15 +9,16 @@ class StatusMessageCreationService
 
   def create(params)
     build_status_message(params).tap do |status_message|
+      load_aspects(params[:aspect_ids]) unless status_message.public?
       add_attachments(status_message, params)
       status_message.save
-      process(status_message, params[:aspect_ids], params[:services])
+      process(status_message, params[:services])
     end
   end
 
   private
 
-  attr_reader :user
+  attr_reader :user, :aspects
 
   def build_status_message(params)
     public = params[:public] || false
@@ -54,13 +55,17 @@ class StatusMessageCreationService
     end
   end
 
-  def process(status_message, aspect_ids, services)
-    add_to_streams(status_message, aspect_ids) unless status_message.public
+  def load_aspects(aspect_ids)
+    @aspects = user.aspects_from_ids(aspect_ids)
+    raise BadAspectsIDs if aspects.empty?
+  end
+
+  def process(status_message, services)
+    add_to_streams(status_message) unless status_message.public?
     dispatch(status_message, services)
   end
 
-  def add_to_streams(status_message, aspect_ids)
-    aspects = user.aspects_from_ids(aspect_ids)
+  def add_to_streams(status_message)
     user.add_to_streams(status_message, aspects)
     status_message.photos.each {|photo| user.add_to_streams(photo, aspects) }
   end

config/locales/diaspora/en.yml

@@ -1122,6 +1122,7 @@ en:
     new:
       mentioning: "Mentioning: %{person}"
     too_long: "Please make your status message fewer than %{count} characters. Right now it is %{current_length} characters"
+    bad_aspects: "Provided aspects IDs aren't applicable (non-existent or not owned)"
 
   stream_helper:
     no_more_posts: "You have reached the end of the stream."