1 files changed, 40 insertions, 0 deletions
diff --git a/app/services/ci/daily_build_group_report_result_service.rb b/app/services/ci/daily_build_group_report_result_service.rb
new file mode 100644
index 00000000000..6cdf3c88f8c
--- /dev/null
+++ b/app/services/ci/daily_build_group_report_result_service.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module Ci
+  class DailyBuildGroupReportResultService
+    def execute(pipeline)
+      return unless Feature.enabled?(:ci_daily_code_coverage, pipeline.project, default_enabled: true)
+
+      DailyBuildGroupReportResult.upsert_reports(coverage_reports(pipeline))
+    end
+
+    private
+
+    def coverage_reports(pipeline)
+      base_attrs = {
+        project_id: pipeline.project_id,
+        ref_path: pipeline.source_ref_path,
+        date: pipeline.created_at.to_date,
+        last_pipeline_id: pipeline.id
+      }
+
+      aggregate(pipeline.builds.with_coverage).map do |group_name, group|
+        base_attrs.merge(
+          group_name: group_name,
+          data: {
+            'coverage' => average_coverage(group)
+          }
+        )
+      end
+    end
+
+    def aggregate(builds)
+      builds.group_by(&:group_name)
+    end
+
+    def average_coverage(group)
+      total_coverage = group.reduce(0.0) { |sum, build| sum + build.coverage }
+      (total_coverage / group.size).round(2)
+    end
+  end
+end