Feature: delegate all open discussions to Issue

When a merge request can only be merged when all discussions are
resolved. This feature allows to easily delegate those discussions to a
new issue, while marking them as resolved in the merge request.

The user is presented with a new issue, prepared with mentions of all
unresolved discussions, including the first unresolved note of the
discussion, time and link to the note.

When the issue is created, the discussions in the merge request will get
a system note directing the user to the newly created issue.

3 files changed, 13 insertions, 1 deletions

diff --git a/app/models/discussion.rb b/app/models/discussion.rb
index 75a85563235..bbe813db823 100644
--- a/app/models/discussion.rb
+++ b/app/models/discussion.rb
@@ -88,6 +88,10 @@ class Discussion
     @first_note ||= @notes.first
   end
 
+  def first_note_to_resolve
+    @first_note_to_resolve ||= notes.detect(&:to_be_resolved?)
+  end
+
   def last_note
     @last_note ||= @notes.last
   end
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index bfb016df46d..a6fc9bb120d 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -480,6 +480,14 @@ class MergeRequest < ActiveRecord::Base
     @diff_discussions ||= self.notes.diff_notes.discussions
   end
 
+  def resolvable_discussions
+    @resolvable_discussions ||= diff_discussions.select(&:to_be_resolved?)
+  end
+
+  def discussions_can_be_resolved_by?(user)
+    resolvable_discussions.all? { |discussion| discussion.can_resolve?(user) }
+  end
+
   def find_diff_discussion(discussion_id)
     notes = self.notes.diff_notes.where(discussion_id: discussion_id).fresh.to_a
     return if notes.empty?
diff --git a/app/models/note.rb b/app/models/note.rb
index 5b50ca285c3..08bd08743ef 100644
--- a/app/models/note.rb
+++ b/app/models/note.rb
@@ -99,7 +99,7 @@ class Note < ActiveRecord::Base
     end
 
     def discussions
-      Discussion.for_notes(all)
+      Discussion.for_notes(fresh)
     end
 
     def grouped_diff_discussions