1 files changed, 67 insertions, 0 deletions
diff --git a/app/workers/process_commit_worker.rb b/app/workers/process_commit_worker.rb
new file mode 100644
index 00000000000..071741fbacd
--- /dev/null
+++ b/app/workers/process_commit_worker.rb
@@ -0,0 +1,67 @@
+# Worker for processing individiual commit messages pushed to a repository.
+#
+# Jobs for this worker are scheduled for every commit that is being pushed. As a
+# result of this the workload of this worker should be kept to a bare minimum.
+# Consider using an extra worker if you need to add any extra (and potentially
+# slow) processing of commits.
+class ProcessCommitWorker
+  include Sidekiq::Worker
+  include DedicatedSidekiqQueue
+
+  # project_id - The ID of the project this commit belongs to.
+  # user_id - The ID of the user that pushed the commit.
+  # commit_sha - The SHA1 of the commit to process.
+  # default - The data was pushed to the default branch.
+  def perform(project_id, user_id, commit_sha, default = false)
+    project = Project.find_by(id: project_id)
+
+    return unless project
+
+    user = User.find_by(id: user_id)
+
+    return unless user
+
+    commit = find_commit(project, commit_sha)
+
+    return unless commit
+
+    author = commit.author || user
+
+    process_commit_message(project, commit, user, author, default)
+
+    update_issue_metrics(commit, author)
+  end
+
+  def process_commit_message(project, commit, user, author, default = false)
+    closed_issues = default ? commit.closes_issues(user) : []
+
+    unless closed_issues.empty?
+      close_issues(project, user, author, commit, closed_issues)
+    end
+
+    commit.create_cross_references!(author, closed_issues)
+  end
+
+  def close_issues(project, user, author, commit, issues)
+    # We don't want to run permission related queries for every single issue,
+    # therefor we use IssueCollection here and skip the authorization check in
+    # Issues::CloseService#execute.
+    IssueCollection.new(issues).updatable_by_user(user).each do |issue|
+      Issues::CloseService.new(project, author).
+        close_issue(issue, commit: commit)
+    end
+  end
+
+  def update_issue_metrics(commit, author)
+    mentioned_issues = commit.all_references(author).issues
+
+    Issue::Metrics.where(issue_id: mentioned_issues.map(&:id), first_mentioned_in_commit_at: nil).
+      update_all(first_mentioned_in_commit_at: commit.committed_date)
+  end
+
+  private
+
+  def find_commit(project, sha)
+    project.commit(sha)
+  end
+end