1 files changed, 101 insertions, 0 deletions
diff --git a/app/presenters/alert_management/alert_presenter.rb b/app/presenters/alert_management/alert_presenter.rb
new file mode 100644
index 00000000000..a515c70152d
--- /dev/null
+++ b/app/presenters/alert_management/alert_presenter.rb
@@ -0,0 +1,101 @@
+# frozen_string_literal: true
+
+module AlertManagement
+  class AlertPresenter < Gitlab::View::Presenter::Delegated
+    include Gitlab::Utils::StrongMemoize
+    include IncidentManagement::Settings
+
+    MARKDOWN_LINE_BREAK = "  \n".freeze
+
+    def initialize(alert, _attributes = {})
+      super
+
+      @alert = alert
+      @project = alert.project
+    end
+
+    def issue_description
+      horizontal_line = "\n\n---\n\n"
+
+      [
+        issue_summary_markdown,
+        alert_markdown,
+        incident_management_setting.issue_template_content
+      ].compact.join(horizontal_line)
+    end
+
+    def start_time
+      started_at&.strftime('%d %B %Y, %-l:%M%p (%Z)')
+    end
+
+    def issue_summary_markdown
+      <<~MARKDOWN.chomp
+        #### Summary
+
+        #{metadata_list}
+        #{alert_details}#{metric_embed_for_alert}
+      MARKDOWN
+    end
+
+    def metrics_dashboard_url; end
+
+    private
+
+    attr_reader :alert, :project
+
+    def alerting_alert
+      strong_memoize(:alerting_alert) do
+        Gitlab::Alerting::Alert.new(project: project, payload: alert.payload).present
+      end
+    end
+
+    def alert_markdown; end
+
+    def metadata_list
+      metadata = []
+
+      metadata << list_item('Start time', start_time)
+      metadata << list_item('Severity', severity)
+      metadata << list_item('full_query', backtick(full_query)) if full_query
+      metadata << list_item('Service', service) if service
+      metadata << list_item('Monitoring tool', monitoring_tool) if monitoring_tool
+      metadata << list_item('Hosts', host_links) if hosts.any?
+      metadata << list_item('Description', description) if description.present?
+
+      metadata.join(MARKDOWN_LINE_BREAK)
+    end
+
+    def alert_details
+      if details.present?
+        <<~MARKDOWN.chomp
+
+          #### Alert Details
+
+          #{details_list}
+        MARKDOWN
+      end
+    end
+
+    def details_list
+      alert.details
+        .map { |label, value| list_item(label, value) }
+        .join(MARKDOWN_LINE_BREAK)
+    end
+
+    def metric_embed_for_alert; end
+
+    def full_query; end
+
+    def list_item(key, value)
+      "**#{key}:** #{value}".strip
+    end
+
+    def backtick(value)
+      "`#{value}`"
+    end
+
+    def host_links
+      hosts.join(' ')
+    end
+  end
+end