1 files changed, 120 insertions, 0 deletions
diff --git a/app/models/integrations/chat_message/push_message.rb b/app/models/integrations/chat_message/push_message.rb
new file mode 100644
index 00000000000..0952986e923
--- /dev/null
+++ b/app/models/integrations/chat_message/push_message.rb
@@ -0,0 +1,120 @@
+# frozen_string_literal: true
+
+module Integrations
+  module ChatMessage
+    class PushMessage < BaseMessage
+      attr_reader :after
+      attr_reader :before
+      attr_reader :commits
+      attr_reader :ref
+      attr_reader :ref_type
+
+      def initialize(params)
+        super
+
+        @after = params[:after]
+        @before = params[:before]
+        @commits = params.fetch(:commits, [])
+        @ref_type = Gitlab::Git.tag_ref?(params[:ref]) ? 'tag' : 'branch'
+        @ref = Gitlab::Git.ref_name(params[:ref])
+      end
+
+      def attachments
+        return [] if new_branch? || removed_branch?
+        return commit_messages if markdown
+
+        commit_message_attachments
+      end
+
+      def activity
+        {
+          title: humanized_action(short: true),
+          subtitle: "in #{project_link}",
+          text: compare_link,
+          image: user_avatar
+        }
+      end
+
+      private
+
+      def humanized_action(short: false)
+        action, ref_link, target_link = compose_action_details
+        text = [user_combined_name, action, ref_type, ref_link]
+        text << target_link unless short
+        text.join(' ')
+      end
+
+      def message
+        humanized_action
+      end
+
+      def format(string)
+        Slack::Messenger::Util::LinkFormatter.format(string)
+      end
+
+      def commit_messages
+        commits.map { |commit| compose_commit_message(commit) }.join("\n\n")
+      end
+
+      def commit_message_attachments
+        [{ text: format(commit_messages), color: attachment_color }]
+      end
+
+      def compose_commit_message(commit)
+        author = commit[:author][:name]
+        id = Commit.truncate_sha(commit[:id])
+        title = commit[:title]
+
+        url = commit[:url]
+
+        "[#{id}](#{url}): #{title} - #{author}"
+      end
+
+      def new_branch?
+        Gitlab::Git.blank_ref?(before)
+      end
+
+      def removed_branch?
+        Gitlab::Git.blank_ref?(after)
+      end
+
+      def ref_url
+        if ref_type == 'tag'
+          "#{project_url}/-/tags/#{ref}"
+        else
+          "#{project_url}/commits/#{ref}"
+        end
+      end
+
+      def compare_url
+        "#{project_url}/compare/#{before}...#{after}"
+      end
+
+      def ref_link
+        "[#{ref}](#{ref_url})"
+      end
+
+      def project_link
+        "[#{project_name}](#{project_url})"
+      end
+
+      def compare_link
+        "[Compare changes](#{compare_url})"
+      end
+
+      def compose_action_details
+        if new_branch?
+          ['pushed new', ref_link, "to #{project_link}"]
+        elsif removed_branch?
+          ['removed', ref, "from #{project_link}"]
+        else
+          ['pushed to', ref_link, "of #{project_link} (#{compare_link})"]
+        end
+      end
+
+      def attachment_color
+        '#345'
+      end
+    end
+  end
+end