gitlab-org--gitlab-foss/lib/gitlab/safe_request_loader.rb

55 lines
1.3 KiB
Ruby

# frozen_string_literal: true
module Gitlab
class SafeRequestLoader
def self.execute(args, &block)
new(**args).execute(&block)
end
def initialize(resource_key:, resource_ids:, default_value: nil)
@resource_key = resource_key
@resource_ids = resource_ids.uniq
@default_value = default_value
@resource_data = {}
end
def execute(&block)
raise ArgumentError, 'Block is mandatory' unless block
load_resource_data
remove_loaded_resource_ids
update_resource_data(&block)
resource_data
end
private
attr_reader :resource_key, :resource_ids, :default_value, :resource_data, :missing_resource_ids
def load_resource_data
@resource_data = Gitlab::SafeRequestStore.fetch(resource_key) { resource_data }
end
def remove_loaded_resource_ids
# Look up only the IDs we need
@missing_resource_ids = resource_ids - resource_data.keys
end
def update_resource_data(&block)
return if missing_resource_ids.blank?
reloaded_resource_data = yield(missing_resource_ids)
@resource_data.merge!(reloaded_resource_data)
mark_absent_values
end
def mark_absent_values
absent = (missing_resource_ids - resource_data.keys).to_h { [_1, default_value] }
@resource_data.merge!(absent)
end
end
end