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<?php
/**
* Measure email throughput to determine the potential scale of email related issues.
* @TODO: Remove this entire file at a later date.
*/
class NF_EmailTelemetry
{
private $is_opted_in = false;
/**
* Constructor which takes in a paremeter to tell the class whether the site is opted
* in for telemetry or not
*
* @param $opted_in
*
* @since 3.3.21
*/
public function __construct( $opted_in = false ) {
$this->is_opted_in = $opted_in;
}
/**
* @hook phpmailer_init The last action before the email is sent.
*/
public function setup()
{
if( $this->is_opted_in ) {
/**
* @link https://codex.wordpress.org/Plugin_API/Action_Reference/phpmailer_init
*/
// Stop collecting data.
// add_action( 'phpmailer_init', array( $this, 'update_metrics' ) );
// Stop scheduling new events.
// add_action( 'wp', array( $this, 'maybe_schedule_push' ) );
// Leave this function registered for now to avoid throwing a cron error.
add_action( 'nf_email_telemetry_push', array( $this, 'push_telemetry' ) );
}
}
/**
* @NOTE No need to return $phpmailer as it is passed in by reference (aka Output Parameter).
*/
public function update_metrics(&$phpmailer)
{
$send_count_metric = NF_Telemetry_MetricFactory::create( 'CountMetric', 'nf_email_send_count' );
$send_count_metric->increment();
$sent_with_attachments = NF_Telemetry_MetricFactory::create( 'CountMetric', 'nf_email_with_attachment_count' );
if( $phpmailer->attachmentExists() ) $sent_with_attachments->increment();
$to_count = count( $phpmailer->getToAddresses() );
$to_count_metric = NF_Telemetry_MetricFactory::create( 'CountMetric', 'nf_email_to_count' );
$to_count_metric->increment( $to_count );
$cc_count = count( $phpmailer->getCcAddresses() );
$cc_count_metric = NF_Telemetry_MetricFactory::create( 'CountMetric', 'nf_email_cc_count' );
$cc_count_metric->increment( $cc_count );
$bcc_count = count( $phpmailer->getBccAddresses() );
$bcc_count_metric = NF_Telemetry_MetricFactory::create( 'CountMetric', 'nf_email_bcc_count' );
$bcc_count_metric->increment( $bcc_count );
$to_max_metric = NF_Telemetry_MetricFactory::create( 'MaxMetric', 'nf_email_to_max' );
$to_max_metric->update( $to_count );
$cc_max_metric = NF_Telemetry_MetricFactory::create( 'MaxMetric', 'nf_email_cc_max' );
$cc_max_metric->update( $cc_count );
$bcc_max_metric = NF_Telemetry_MetricFactory::create( 'MaxMetric', 'nf_email_bcc_max' );
$bcc_max_metric->update( $bcc_count );
$recipient_max_metric = NF_Telemetry_MetricFactory::create( 'MaxMetric', 'nf_email_recipient_max' );
$recipient_max_metric->update( count( $phpmailer->getAllRecipientAddresses() ) );
$attachment_count = count( $phpmailer->getAttachments() );
$attachment_count_metric = NF_Telemetry_MetricFactory::create( 'CountMetric', 'nf_email_attachment_count' );
$attachment_count_metric->increment( $attachment_count );
$attachment_filesize_count_metric = NF_Telemetry_MetricFactory::create( 'CountMetric', 'nf_email_attachment_filesize_count' );
$attachment_filesize_max_metric = NF_Telemetry_MetricFactory::create( 'MaxMetric', 'nf_email_attachment_filesize_max' );
foreach( $phpmailer->getAttachments() as $attachment ) {
$filename = $attachment[0];
if( $filesize = filesize( $filename ) ){
$attachment_filesize_count_metric->increment( $filesize );
$attachment_filesize_max_metric->update( $filesize );
}
}
}
public function maybe_schedule_push()
{
if ( ! wp_next_scheduled( 'nf_email_telemetry_push' ) ) {
wp_schedule_event( current_time( 'timestamp' ), 'nf-weekly', 'nf_email_telemetry_push' );
}
}
public function push_telemetry()
{
// (Deprecated) Exit without doing anything.
return false;
$metrics = array(
'nf_email_send_count',
'nf_email_with_attachment_count',
'nf_email_to_count',
'nf_email_to_max',
'nf_email_cc_count',
'nf_email_cc_max',
'nf_email_bcc_count',
'nf_email_bcc_max',
'nf_email_recipient_max',
'nf_email_attachment_count',
'nf_email_attachment_filesize_count',
'nf_email_attachment_filesize_max',
);
$telemetry_data = array();
foreach( $metrics as $metric ) {
$repository = new NF_Telemetry_MetricRepository( $metric, $default = 0 );
$telemetry_data[ $metric ] = $repository->get();
$repository->save( 0 );
}
Ninja_Forms()->dispatcher()->send( 'wpsend_stats', $telemetry_data );
}
}