Merge branch 'dm-update-discussion-diff-position' into 'master'

Update diff discussion position per discussion instead of per note

Closes #33157

See merge request !11833

5 files changed, 64 insertions, 51 deletions

diff --git a/app/models/diff_discussion.rb b/app/models/diff_discussion.rb
index 800574d8be0..07c4846e2ac 100644
--- a/app/models/diff_discussion.rb
+++ b/app/models/diff_discussion.rb
@@ -10,6 +10,7 @@ class DiffDiscussion < Discussion
 
   delegate  :position,
             :original_position,
+            :change_position,
 
             to: :first_note
 
diff --git a/app/models/diff_note.rb b/app/models/diff_note.rb
index 6cd0502069a..20ef1378500 100644
--- a/app/models/diff_note.rb
+++ b/app/models/diff_note.rb
@@ -95,13 +95,21 @@ class DiffNote < Note
 
     return if active?
 
-    Notes::DiffPositionUpdateService.new(
-      self.project,
-      nil,
+    tracer = Gitlab::Diff::PositionTracer.new(
+      project: self.project,
       old_diff_refs: self.position.diff_refs,
-      new_diff_refs: noteable.diff_refs,
+      new_diff_refs: self.noteable.diff_refs,
       paths: self.position.paths
-    ).execute(self)
+    )
+
+    result = tracer.trace(self.position)
+    return unless result
+
+    if result[:outdated]
+      self.change_position = result[:position]
+    else
+      self.position = result[:position]
+    end
   end
 
   def verify_supported
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index 4bccda8a732..dd155252ad5 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -421,7 +421,7 @@ class MergeRequest < ActiveRecord::Base
     MergeRequests::MergeRequestDiffCacheService.new.execute(self)
     new_diff_refs = self.diff_refs
 
-    update_diff_notes_positions(
+    update_diff_discussion_positions(
       old_diff_refs: old_diff_refs,
       new_diff_refs: new_diff_refs,
       current_user: current_user
@@ -853,19 +853,18 @@ class MergeRequest < ActiveRecord::Base
     diff_refs && diff_refs.complete?
   end
 
-  def update_diff_notes_positions(old_diff_refs:, new_diff_refs:, current_user: nil)
+  def update_diff_discussion_positions(old_diff_refs:, new_diff_refs:, current_user: nil)
     return unless has_complete_diff_refs?
     return if new_diff_refs == old_diff_refs
 
-    active_diff_notes = self.notes.new_diff_notes.select do |note|
-      note.active?(old_diff_refs)
+    active_diff_discussions = self.notes.new_diff_notes.discussions.select do |discussion|
+      discussion.active?(old_diff_refs)
     end
+    return if active_diff_discussions.empty?
 
-    return if active_diff_notes.empty?
+    paths = active_diff_discussions.flat_map { |n| n.diff_file.paths }.uniq
 
-    paths = active_diff_notes.flat_map { |n| n.diff_file.paths }.uniq
-
-    service = Notes::DiffPositionUpdateService.new(
+    service = Discussions::UpdateDiffPositionService.new(
       self.project,
       current_user,
       old_diff_refs: old_diff_refs,
@@ -873,11 +872,8 @@ class MergeRequest < ActiveRecord::Base
       paths: paths
     )
 
-    transaction do
-      active_diff_notes.each do |note|
-        service.execute(note)
-        Gitlab::Timeless.timeless(note, &:save)
-      end
+    active_diff_discussions.each do |discussion|
+      service.execute(discussion)
     end
   end
 
diff --git a/app/services/discussions/update_diff_position_service.rb b/app/services/discussions/update_diff_position_service.rb
new file mode 100644
index 00000000000..1ef8d9edbe1
--- /dev/null
+++ b/app/services/discussions/update_diff_position_service.rb
@@ -0,0 +1,41 @@
+module Discussions
+  class UpdateDiffPositionService < BaseService
+    def execute(discussion)
+      result = tracer.trace(discussion.position)
+      return unless result
+
+      position = result[:position]
+      outdated = result[:outdated]
+
+      discussion.notes.each do |note|
+        if outdated
+          note.change_position = position
+        else
+          note.position = position
+          note.change_position = nil
+        end
+      end
+
+      Note.transaction do
+        discussion.notes.each do |note|
+          Gitlab::Timeless.timeless(note, &:save)
+        end
+
+        if outdated && current_user
+          SystemNoteService.diff_discussion_outdated(discussion, project, current_user, position)
+        end
+      end
+    end
+
+    private
+
+    def tracer
+      @tracer ||= Gitlab::Diff::PositionTracer.new(
+        project: project,
+        old_diff_refs: params[:old_diff_refs],
+        new_diff_refs: params[:new_diff_refs],
+        paths: params[:paths]
+      )
+    end
+  end
+end
diff --git a/app/services/notes/diff_position_update_service.rb b/app/services/notes/diff_position_update_service.rb
deleted file mode 100644
index eff7b287269..00000000000
--- a/app/services/notes/diff_position_update_service.rb
+++ /dev/null
@@ -1,33 +0,0 @@
-module Notes
-  class DiffPositionUpdateService < BaseService
-    def execute(note)
-      results = tracer.trace(note.position)
-      return unless results
-
-      position = results[:position]
-      outdated = results[:outdated]
-
-      if outdated
-        note.change_position = position
-
-        if note.persisted? && current_user
-          SystemNoteService.diff_discussion_outdated(note.to_discussion, project, current_user, position)
-        end
-      else
-        note.position = position
-        note.change_position = nil
-      end
-    end
-
-    private
-
-    def tracer
-      @tracer ||= Gitlab::Diff::PositionTracer.new(
-        project: project,
-        old_diff_refs: params[:old_diff_refs],
-        new_diff_refs: params[:new_diff_refs],
-        paths: params[:paths]
-      )
-    end
-  end
-end