1 files changed, 76 insertions, 0 deletions
diff --git a/app/models/integrations/chat_message/alert_message.rb b/app/models/integrations/chat_message/alert_message.rb
new file mode 100644
index 00000000000..ef0579124fe
--- /dev/null
+++ b/app/models/integrations/chat_message/alert_message.rb
@@ -0,0 +1,76 @@
+# frozen_string_literal: true
+
+module Integrations
+  module ChatMessage
+    class AlertMessage < BaseMessage
+      attr_reader :title
+      attr_reader :alert_url
+      attr_reader :severity
+      attr_reader :events
+      attr_reader :status
+      attr_reader :started_at
+
+      def initialize(params)
+        @project_name = params[:project_name] || params.dig(:project, :path_with_namespace)
+        @project_url = params.dig(:project, :web_url) || params[:project_url]
+        @title = params.dig(:object_attributes, :title)
+        @alert_url = params.dig(:object_attributes, :url)
+        @severity = params.dig(:object_attributes, :severity)
+        @events = params.dig(:object_attributes, :events)
+        @status = params.dig(:object_attributes, :status)
+        @started_at = params.dig(:object_attributes, :started_at)
+      end
+
+      def attachments
+        [{
+          title: title,
+          title_link: alert_url,
+          color: attachment_color,
+          fields: attachment_fields
+        }]
+      end
+
+      def message
+        "Alert firing in #{project_name}"
+      end
+
+      private
+
+      def attachment_color
+        "#C95823"
+      end
+
+      def attachment_fields
+        [
+          {
+            title: "Severity",
+            value: severity.to_s.humanize,
+            short: true
+          },
+          {
+            title: "Events",
+            value: events,
+            short: true
+          },
+          {
+            title: "Status",
+            value: status.to_s.humanize,
+            short: true
+          },
+          {
+            title: "Start time",
+            value: format_time(started_at),
+            short: true
+          }
+        ]
+      end
+
+      # This formats time into the following format
+      # April 23rd, 2020 1:06AM UTC
+      def format_time(time)
+        time = Time.zone.parse(time.to_s)
+        time.strftime("%B #{time.day.ordinalize}, %Y %l:%M%p %Z")
+      end
+    end
+  end
+end