1 files changed, 40 insertions, 0 deletions
diff --git a/app/services/system_notes/incidents_service.rb b/app/services/system_notes/incidents_service.rb
new file mode 100644
index 00000000000..d5da684a2d8
--- /dev/null
+++ b/app/services/system_notes/incidents_service.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module SystemNotes
+  class IncidentsService < ::SystemNotes::BaseService
+    CHANGED_TEXT = {
+      occurred_at: 'the event time/date on ',
+      note: 'the text on ',
+      occurred_at_and_note: 'the event time/date and text on '
+    }.freeze
+
+    def initialize(noteable:)
+      @noteable = noteable
+      @project = noteable.project
+    end
+
+    def add_timeline_event(timeline_event)
+      author = timeline_event.author
+      anchor = "timeline_event_#{timeline_event.id}"
+      path = url_helpers.project_issues_incident_path(project, noteable, anchor: anchor)
+      body = "added an [incident timeline event](#{path})"
+
+      create_note(NoteSummary.new(noteable, project, author, body, action: 'timeline_event'))
+    end
+
+    def edit_timeline_event(timeline_event, author, was_changed:)
+      anchor = "timeline_event_#{timeline_event.id}"
+      path = url_helpers.project_issues_incident_path(project, noteable, anchor: anchor)
+      changed_text = CHANGED_TEXT.fetch(was_changed, '')
+      body = "edited #{changed_text}[incident timeline event](#{path})"
+
+      create_note(NoteSummary.new(noteable, project, author, body, action: 'timeline_event'))
+    end
+
+    def delete_timeline_event(author)
+      body = 'deleted an incident timeline event'
+
+      create_note(NoteSummary.new(noteable, project, author, body, action: 'timeline_event'))
+    end
+  end
+end