module Datadog::Tracing::Contrib::ActionMailer::Events::Deliver

def event_name
  self::EVENT_NAME
end

def process(span, event, _id, payload)
  super
  span.span_type = span_type
  span.set_tag(Ext::TAG_MAILER, payload[:mailer])
  span.set_tag(Ext::TAG_MSG_ID, payload[:message_id])
  span.set_tag(Tracing::Metadata::Ext::TAG_OPERATION, Ext::TAG_OPERATION_DELIVER)
  # Since email date can contain PII we disable by default
  # Some of these fields can be either strings or arrays, so we try to normalize
  # https://github.com/rails/rails/blob/18707ab17fa492eb25ad2e8f9818a320dc20b823/actionmailer/lib/action_mailer/base.rb#L742-L754
  if configuration[:email_data] == true
    span.set_tag(Ext::TAG_SUBJECT, payload[:subject].to_s) if payload[:subject]
    span.set_tag(Ext::TAG_TO, payload[:to].join(',')) if payload[:to]
    span.set_tag(Ext::TAG_FROM, payload[:from].join(',')) if payload[:from]
    span.set_tag(Ext::TAG_BCC, payload[:bcc].join(',')) if payload[:bcc]
    span.set_tag(Ext::TAG_CC, payload[:cc].join(',')) if payload[:cc]
    span.set_tag(Ext::TAG_DATE, payload[:date].to_s) if payload[:date]
    span.set_tag(Ext::TAG_PERFORM_DELIVERIES, payload[:perform_deliveries]) if payload[:perform_deliveries]
  end
end

def span_name
  Ext::SPAN_DELIVER
end

def span_type
  # deliver.action_mailer sends emails
  Tracing::Metadata::Ext::AppTypes::TYPE_WORKER
end