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# frozen_string_literal: true
# This module is providing helpers for updating `ProjectStatistics` with `after_save` and `before_destroy` hooks.
#
# It deals with `ProjectStatistics.increment_statistic` making sure not to update statistics on a cascade delete from the
# project, and keeping track of value deltas on each save. It updates the DB only when a change is needed.
#
# Example:
#
# module Ci
# class JobArtifact < ApplicationRecord
# include UpdateProjectStatistics
#
# update_project_statistics project_statistics_name: :build_artifacts_size
# end
# end
#
# Expectation:
#
# - `statistic_attribute` must be an ActiveRecord attribute
# - The model must implement `project` and `project_id`. i.e. direct Project relationship or delegation
module UpdateProjectStatistics
extend ActiveSupport::Concern
include AfterCommitQueue
class_methods do
attr_reader :project_statistics_name, :statistic_attribute
# Configure the model to update `project_statistics_name` on ProjectStatistics,
# when `statistic_attribute` changes
#
# - project_statistics_name: A column of `ProjectStatistics` to update
# - statistic_attribute: An attribute of the current model, default to `size`
def update_project_statistics(project_statistics_name:, statistic_attribute: :size)
@project_statistics_name = project_statistics_name
@statistic_attribute = statistic_attribute
after_save(:update_project_statistics_after_save, if: :update_project_statistics_attribute_changed?)
after_destroy(:update_project_statistics_after_destroy, unless: :project_destroyed?)
end
private :update_project_statistics
end
included do
private
def update_project_statistics_after_save
attr = self.class.statistic_attribute
delta = read_attribute(attr).to_i - attribute_before_last_save(attr).to_i
update_project_statistics(delta)
schedule_namespace_aggregation_worker
end
def update_project_statistics_attribute_changed?
saved_change_to_attribute?(self.class.statistic_attribute)
end
def update_project_statistics_after_destroy
update_project_statistics(-read_attribute(self.class.statistic_attribute).to_i)
schedule_namespace_aggregation_worker
end
def project_destroyed?
project.pending_delete?
end
def update_project_statistics(delta)
ProjectStatistics.increment_statistic(project_id, self.class.project_statistics_name, delta)
end
def schedule_namespace_aggregation_worker
run_after_commit do
next unless schedule_aggregation_worker?
Namespaces::ScheduleAggregationWorker.perform_async(project.namespace_id)
end
end
def schedule_aggregation_worker?
!project.nil? &&
Feature.enabled?(:update_statistics_namespace, project.root_ancestor)
end
end
end
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