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# frozen_string_literal: true
module IncidentManagement
module PagerDuty
class ProcessWebhookService
include Gitlab::Utils::StrongMemoize
include IncidentManagement::Settings
# https://developer.pagerduty.com/docs/webhooks/webhook-behavior/#size-limit
PAGER_DUTY_PAYLOAD_SIZE_LIMIT = 55.kilobytes
# https://developer.pagerduty.com/docs/webhooks/v2-overview/#webhook-types
PAGER_DUTY_PROCESSABLE_EVENT_TYPES = %w(incident.trigger).freeze
def initialize(project, payload)
@project = project
@payload = payload
end
def execute(token)
return forbidden unless webhook_setting_active?
return unauthorized unless valid_token?(token)
return bad_request unless valid_payload_size?
process_incidents
accepted
end
private
attr_reader :project, :payload
def process_incidents
pager_duty_processable_events.each do |event|
::IncidentManagement::PagerDuty::ProcessIncidentWorker.perform_async(project.id, event['incident'])
end
end
def pager_duty_processable_events
strong_memoize(:pager_duty_processable_events) do
::PagerDuty::WebhookPayloadParser
.call(payload.to_h)
.filter { |msg| msg['event'].to_s.in?(PAGER_DUTY_PROCESSABLE_EVENT_TYPES) }
end
end
def webhook_setting_active?
incident_management_setting.pagerduty_active?
end
def valid_token?(token)
token && incident_management_setting.pagerduty_token == token
end
def valid_payload_size?
Gitlab::Utils::DeepSize.new(payload, max_size: PAGER_DUTY_PAYLOAD_SIZE_LIMIT).valid?
end
def accepted
ServiceResponse.success(http_status: :accepted)
end
def forbidden
ServiceResponse.error(message: 'Forbidden', http_status: :forbidden)
end
def unauthorized
ServiceResponse.error(message: 'Unauthorized', http_status: :unauthorized)
end
def bad_request
ServiceResponse.error(message: 'Bad Request', http_status: :bad_request)
end
end
end
end
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