Only show recent push event if the branch still exists or a recent merge request has not been created

Closes #2277

3 files changed, 43 insertions, 2 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 8214e57aaa7..927f547bdae 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,7 @@
 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.0.0 (unreleased)
+  - Only show recent push event if the branch still exists or a recent merge request has not been created (Stan Hu)
   - Remove satellites
   - Better performance for web editor (switched from satellites to rugged)
   - Faster merge
diff --git a/app/models/user.rb b/app/models/user.rb
index 57145cc6b6e..f70761074c5 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -471,8 +471,19 @@ class User < ActiveRecord::Base
     events = recent_events.code_push.where("created_at > ?", Time.now - 2.hours)
     events = events.where(project_id: project_id) if project_id
 
-    # Take only latest one
-    events = events.recent.limit(1).first
+    # Use the latest event that has not been pushed or merged recently
+    events.recent.find do |event|
+      project = Project.find_by_id(event.project_id)
+      next unless project
+      repo = project.repository
+
+      if repo.branch_names.include?(event.branch_name)
+        merge_requests = MergeRequest.where("created_at >= ?", event.created_at).
+            where(source_project_id: project.id,
+                  source_branch: event.branch_name)
+        merge_requests.empty?
+      end
+    end
   end
 
   def projects_sorted_by_activity
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 876cfb1204a..a46e789eab4 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -710,4 +710,33 @@ describe User do
       it { expect(subject.can_be_removed?).to be_falsey }
     end
   end
+
+  describe "#recent_push" do
+    subject { create(:user) }
+    let!(:project1) { create(:project) }
+    let!(:project2) { create(:project, forked_from_project: project1) }
+    let!(:push_data) { Gitlab::PushDataBuilder.build_sample(project2, subject) }
+    let!(:push_event) { create(:event, action: Event::PUSHED, project: project2, target: project1, author: subject, data: push_data) }
+
+    before do
+      project1.team << [subject, :master]
+      project2.team << [subject, :master]
+    end
+
+    it "includes push event" do
+      expect(subject.recent_push).to eq(push_event)
+    end
+
+    it "excludes push event if branch has been deleted" do
+      allow_any_instance_of(Repository).to receive(:branch_names).and_return(['foo'])
+
+      expect(subject.recent_push).to eq(nil)
+    end
+
+    it "excludes push event if MR is opened for it" do
+      create(:merge_request, source_project: project2, target_project: project1, source_branch: project2.default_branch, target_branch: 'fix', author: subject)
+
+      expect(subject.recent_push).to eq(nil)
+    end
+  end
 end