Fix #3583: Copying notes should copy tags to destination.

app/models/post.rb

@@ -8,6 +8,9 @@ class Post < ApplicationRecord
   class SearchError < Exception ; end
   class DeletionError < Exception ; end
 
+  # Tags to copy when copying notes.
+  NOTE_COPY_TAGS = %w[translated partially_translated check_translation translation_request reverse_translation]
+
   before_validation :initialize_uploader, :on => :create
   before_validation :merge_old_changes
   before_validation :normalize_tags
@@ -1414,7 +1417,7 @@ class Post < ApplicationRecord
       last_noted_at.present?
     end
 
-    def copy_notes_to(other_post)
+    def copy_notes_to(other_post, copy_tags: NOTE_COPY_TAGS)
       transaction do
         if id == other_post.id
           errors.add :base, "Source and destination posts are the same"
@@ -1439,6 +1442,14 @@ class Post < ApplicationRecord
         dummy.post_id = other_post.id
         dummy.x = dummy.y = dummy.width = dummy.height = 0
         dummy.save
+
+        copy_tags.each do |tag|
+          other_post.remove_tag(tag)
+          other_post.add_tag(tag) if has_tag?(tag)
+        end
+
+        other_post.has_embedded_notes = has_embedded_notes
+        other_post.save
       end
     end
   end

test/unit/post_test.rb

@@ -2663,6 +2663,32 @@ class PostTest < ActiveSupport::TestCase
     end
   end
 
+  context "Notes:" do
+    context "#copy_notes_to" do
+      setup do
+        @src = FactoryGirl.create(:post, image_width: 100, image_height: 100, tag_string: "translated partially_translated", has_embedded_notes: true)
+        @dst = FactoryGirl.create(:post, image_width: 200, image_height: 200, tag_string: "translation_request")
+
+        @src.notes.create(x: 10, y: 10, width: 10, height: 10, body: "test")
+        @src.notes.create(x: 10, y: 10, width: 10, height: 10, body: "deleted", is_active: false)
+        @src.reload
+
+        @src.copy_notes_to(@dst)
+      end
+
+      should "copy notes and tags" do
+        assert_equal(1, @dst.notes.active.length)
+        assert_equal(true, @dst.has_embedded_notes)
+        assert_equal("lowres partially_translated translated", @dst.tag_string)
+      end
+
+      should "rescale notes" do
+        note = @dst.notes.active.first
+        assert_equal([20, 20, 20, 20], [note.x, note.y, note.width, note.height])
+      end
+    end
+  end
+
   context "Mass assignment: " do
     should_not allow_mass_assignment_of(:last_noted_at).as(:member)
   end