1 files changed, 77 insertions, 0 deletions
diff --git a/app/controllers/projects/ci/daily_build_group_report_results_controller.rb b/app/controllers/projects/ci/daily_build_group_report_results_controller.rb
new file mode 100644
index 00000000000..dfda5fca310
--- /dev/null
+++ b/app/controllers/projects/ci/daily_build_group_report_results_controller.rb
@@ -0,0 +1,77 @@
+# frozen_string_literal: true
+
+class Projects::Ci::DailyBuildGroupReportResultsController < Projects::ApplicationController
+  include Gitlab::Utils::StrongMemoize
+
+  MAX_ITEMS = 1000
+  REPORT_WINDOW = 90.days
+
+  before_action :validate_feature_flag!
+  before_action :authorize_download_code! # Share the same authorization rules as the graphs controller
+  before_action :validate_param_type!
+
+  def index
+    respond_to do |format|
+      format.csv { send_data(render_csv(results), type: 'text/csv; charset=utf-8') }
+    end
+  end
+
+  private
+
+  def validate_feature_flag!
+    render_404 unless Feature.enabled?(:ci_download_daily_code_coverage, project, default_enabled: true)
+  end
+
+  def validate_param_type!
+    respond_422 unless allowed_param_types.include?(param_type)
+  end
+
+  def render_csv(collection)
+    CsvBuilders::SingleBatch.new(
+      collection,
+      {
+        date: 'date',
+        group_name: 'group_name',
+        param_type => -> (record) { record.data[param_type] }
+      }
+    ).render
+  end
+
+  def results
+    Ci::DailyBuildGroupReportResultsFinder.new(finder_params).execute
+  end
+
+  def finder_params
+    {
+      current_user: current_user,
+      project: project,
+      ref_path: params.require(:ref_path),
+      start_date: start_date,
+      end_date: end_date,
+      limit: MAX_ITEMS
+    }
+  end
+
+  def start_date
+    strong_memoize(:start_date) do
+      start_date = Date.parse(params.require(:start_date))
+
+      # The start_date cannot be older than `end_date - 90 days`
+      [start_date, end_date - REPORT_WINDOW].max
+    end
+  end
+
+  def end_date
+    strong_memoize(:end_date) do
+      Date.parse(params.require(:end_date))
+    end
+  end
+
+  def allowed_param_types
+    Ci::DailyBuildGroupReportResult::PARAM_TYPES
+  end
+
+  def param_type
+    params.require(:param_type)
+  end
+end