Resolve "DashboardController#activity.json is slow due to SQL"

3 files changed, 49 insertions, 0 deletions

diff --git a/app/services/base_renderer.rb b/app/services/base_renderer.rb
new file mode 100644
index 00000000000..d6e30bd7008
--- /dev/null
+++ b/app/services/base_renderer.rb
@@ -0,0 +1,7 @@
+class BaseRenderer
+  attr_reader :current_user
+
+  def initialize(current_user = nil)
+    @current_user = current_user
+  end
+end
diff --git a/app/services/events/render_service.rb b/app/services/events/render_service.rb
new file mode 100644
index 00000000000..0b62d8aedf1
--- /dev/null
+++ b/app/services/events/render_service.rb
@@ -0,0 +1,21 @@
+module Events
+  class RenderService < BaseRenderer
+    def execute(events, atom_request: false)
+      events.map(&:note).compact.group_by(&:project).each do |project, notes|
+        render_notes(notes, project, atom_request)
+      end
+    end
+
+    private
+
+    def render_notes(notes, project, atom_request)
+      Notes::RenderService.new(current_user).execute(notes, project, render_options(atom_request))
+    end
+
+    def render_options(atom_request)
+      return {} unless atom_request
+
+      { only_path: false, xhtml: true }
+    end
+  end
+end
diff --git a/app/services/notes/render_service.rb b/app/services/notes/render_service.rb
new file mode 100644
index 00000000000..a77e98c2b07
--- /dev/null
+++ b/app/services/notes/render_service.rb
@@ -0,0 +1,21 @@
+module Notes
+  class RenderService < BaseRenderer
+    # Renders a collection of Note instances.
+    #
+    # notes - The notes to render.
+    # project - The project to use for redacting.
+    # user - The user viewing the notes.
+
+    # Possible options:
+    # requested_path - The request path.
+    # project_wiki - The project's wiki.
+    # ref - The current Git reference.
+    # only_path - flag to turn relative paths into absolute ones.
+    # xhtml - flag to save the html in XHTML
+    def execute(notes, project, **opts)
+      renderer = Banzai::ObjectRenderer.new(project, current_user, **opts)
+
+      renderer.render(notes, :note)
+    end
+  end
+end