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<?php
namespace WPMailSMTP\Providers;
use WPMailSMTP\Admin\DebugEvents\DebugEvents;
use WPMailSMTP\Conflicts;
use WPMailSMTP\Debug;
use WPMailSMTP\MailCatcherInterface;
use WPMailSMTP\Options;
use WPMailSMTP\WP;
/**
* Class MailerAbstract.
*
* @since 1.0.0
*/
abstract class MailerAbstract implements MailerInterface {
/**
* Which response code from HTTP provider is considered to be successful?
*
* @since 1.0.0
*
* @var int
*/
protected $email_sent_code = 200;
/**
* @since 1.0.0
*
* @var Options
*/
protected $options;
/**
* @since 1.0.0
*
* @var MailCatcherInterface
*/
protected $phpmailer;
/**
* @since 1.0.0
*
* @var string
*/
protected $mailer = '';
/**
* URL to make an API request to.
*
* @since 1.0.0
*
* @var string
*/
protected $url = '';
/**
* @since 1.0.0
*
* @var array
*/
protected $headers = array();
/**
* @since 1.0.0
*
* @var array
*/
protected $body = array();
/**
* @since 1.0.0
*
* @var mixed
*/
protected $response = array();
/**
* The error message recorded when email sending failed and the error can't be processed from the API response.
*
* @since 2.5.0
*
* @var string
*/
protected $error_message = '';
/**
* Should the email sent by this mailer have its "sent status" verified via its API?
*
* @since 2.5.0
*
* @var bool
*/
protected $verify_sent_status = false;
/**
* Mailer constructor.
*
* @since 1.0.0
*
* @param MailCatcherInterface $phpmailer The MailCatcher object.
*/
public function __construct( MailCatcherInterface $phpmailer ) {
$this->options = new Options();
$this->mailer = $this->options->get( 'mail', 'mailer' );
// Only non-SMTP mailers need URL and extra processing for PHPMailer class.
if ( ! $this->options->is_mailer_smtp() && empty( $this->url ) ) {
return;
}
$this->process_phpmailer( $phpmailer );
}
/**
* Re-use the MailCatcher class methods and properties.
*
* @since 1.0.0
*
* @param MailCatcherInterface $phpmailer The MailCatcher object.
*/
public function process_phpmailer( $phpmailer ) {
// Make sure that we have access to PHPMailer class methods.
if ( ! wp_mail_smtp()->is_valid_phpmailer( $phpmailer ) ) {
return;
}
$this->phpmailer = $phpmailer;
// Prevent working with those methods, as they are not needed for SMTP-like mailers.
if ( $this->options->is_mailer_smtp() ) {
return;
}
$this->set_headers( $this->phpmailer->getCustomHeaders() );
$this->set_from( $this->phpmailer->From, $this->phpmailer->FromName );
$this->set_recipients(
array(
'to' => $this->phpmailer->getToAddresses(),
'cc' => $this->phpmailer->getCcAddresses(),
'bcc' => $this->phpmailer->getBccAddresses(),
)
);
$this->set_subject( $this->phpmailer->Subject );
if ( $this->phpmailer->ContentType === 'text/plain' ) {
$this->set_content( $this->phpmailer->Body );
} else {
$this->set_content(
array(
'text' => $this->phpmailer->AltBody,
'html' => $this->phpmailer->Body,
)
);
}
$this->set_return_path( $this->phpmailer->From );
$this->set_reply_to( $this->phpmailer->getReplyToAddresses() );
/*
* In some cases we will need to modify the internal structure
* of the body content, if attachments are present.
* So lets make this call the last one.
*/
$this->set_attachments( $this->phpmailer->getAttachments() );
}
/**
* Set the email headers.
*
* @since 1.0.0
*
* @param array $headers List of key=>value pairs.
*/
public function set_headers( $headers ) {
foreach ( $headers as $header ) {
$name = isset( $header[0] ) ? $header[0] : false;
$value = isset( $header[1] ) ? $header[1] : false;
if ( empty( $name ) || empty( $value ) ) {
continue;
}
$this->set_header( $name, $value );
}
}
/**
* Set individual header key=>value pair for the email.
*
* @since 1.0.0
*
* @param string $name
* @param string $value
*/
public function set_header( $name, $value ) {
$name = sanitize_text_field( $name );
$this->headers[ $name ] = WP::sanitize_value( $value );
}
/**
* Set email subject.
*
* @since 1.0.0
*
* @param string $subject
*/
public function set_subject( $subject ) {
$this->set_body_param(
array(
'subject' => $subject,
)
);
}
/**
* Set the request params, that goes to the body of the HTTP request.
*
* @since 1.0.0
*
* @param array $param Key=>value of what should be sent to a 3rd party API.
*
* @internal param array $params
*/
protected function set_body_param( $param ) {
$this->body = Options::array_merge_recursive( $this->body, $param );
}
/**
* Get the email body.
*
* @since 1.0.0
*
* @return string|array
*/
public function get_body() {
return apply_filters( 'wp_mail_smtp_providers_mailer_get_body', $this->body, $this->mailer );
}
/**
* Get the email headers.
*
* @since 1.0.0
*
* @return array
*/
public function get_headers() {
return apply_filters( 'wp_mail_smtp_providers_mailer_get_headers', $this->headers, $this->mailer );
}
/**
* Send the email.
*
* @since 1.0.0
* @since 1.8.0 Added timeout for requests, same as max_execution_time.
*/
public function send() {
$timeout = (int) ini_get( 'max_execution_time' );
$params = Options::array_merge_recursive(
$this->get_default_params(),
array(
'headers' => $this->get_headers(),
'body' => $this->get_body(),
'timeout' => $timeout ? $timeout : 30,
)
);
$response = wp_safe_remote_post( $this->url, $params );
DebugEvents::add_debug(
esc_html__( 'An email request was sent.' )
);
$this->process_response( $response );
}
/**
* We might need to do something after the email was sent to the API.
* In this method we preprocess the response from the API.
*
* @since 1.0.0
*
* @param mixed $response
*/
protected function process_response( $response ) {
if ( is_wp_error( $response ) ) {
// Save the error text.
$errors = $response->get_error_messages();
foreach ( $errors as $error ) {
$this->error_message .= $error . PHP_EOL;
}
return;
}
if ( isset( $response['body'] ) && WP::is_json( $response['body'] ) ) {
$response['body'] = \json_decode( $response['body'] );
}
$this->response = $response;
}
/**
* Get the default params, required for wp_safe_remote_post().
*
* @since 1.0.0
*
* @return array
*/
protected function get_default_params() {
return apply_filters(
'wp_mail_smtp_providers_mailer_get_default_params',
array(
'timeout' => 15,
'httpversion' => '1.1',
'blocking' => true,
),
$this->mailer
);
}
/**
* Whether the email is sent or not.
* We basically check the response code from a request to provider.
* Might not be 100% correct, not guarantees that email is delivered.
*
* @since 1.0.0
*
* @return bool
*/
public function is_email_sent() {
$is_sent = false;
if ( wp_remote_retrieve_response_code( $this->response ) === $this->email_sent_code ) {
$is_sent = true;
} else {
$error = $this->get_response_error();
if ( ! empty( $error ) ) {
// Add mailer to the beginning and save to display later.
$message = 'Mailer: ' . esc_html( wp_mail_smtp()->get_providers()->get_options( $this->mailer )->get_title() ) . "\r\n";
$conflicts = new Conflicts();
if ( $conflicts->is_detected() ) {
$message .= 'Conflicts: ' . esc_html( $conflicts->get_conflict_name() ) . "\r\n";
}
Debug::set( $message . $error );
}
}
// Clear debug messages if email is successfully sent.
if ( $is_sent ) {
Debug::clear();
}
return apply_filters( 'wp_mail_smtp_providers_mailer_is_email_sent', $is_sent, $this->mailer );
}
/**
* The error message when email sending failed.
* Should be overwritten when appropriate.
*
* @since 1.2.0
* @since 2.5.0 Return a non-empty error_message attribute.
*
* @return string
*/
public function get_response_error() {
return ! empty( $this->error_message ) ? $this->error_message : '';
}
/**
* Whether the mailer supports the current PHP version or not.
*
* @since 1.0.0
*
* @return bool
*/
public function is_php_compatible() {
$options = wp_mail_smtp()->get_providers()->get_options( $this->mailer );
return version_compare( phpversion(), $options->get_php_version(), '>=' );
}
/**
* This method is relevant to SMTP and Pepipost.
* All other custom mailers should override it with own information.
*
* @since 1.2.0
*
* @return string
*/
public function get_debug_info() {
global $phpmailer;
$smtp_text = array();
// Mail mailer has nothing to return.
if ( $this->options->is_mailer_smtp() ) {
// phpcs:disable
$smtp_text[] = '<strong>ErrorInfo:</strong> ' . make_clickable( wp_strip_all_tags( $phpmailer->ErrorInfo ) );
$smtp_text[] = '<strong>Host:</strong> ' . $phpmailer->Host;
$smtp_text[] = '<strong>Port:</strong> ' . $phpmailer->Port;
$smtp_text[] = '<strong>SMTPSecure:</strong> ' . Debug::pvar( $phpmailer->SMTPSecure );
$smtp_text[] = '<strong>SMTPAutoTLS:</strong> ' . Debug::pvar( $phpmailer->SMTPAutoTLS );
$smtp_text[] = '<strong>SMTPAuth:</strong> ' . Debug::pvar( $phpmailer->SMTPAuth );
if ( ! empty( $phpmailer->SMTPOptions ) ) {
$smtp_text[] = '<strong>SMTPOptions:</strong> <code>' . wp_json_encode( $phpmailer->SMTPOptions ) . '</code>';
}
// phpcs:enable
}
$smtp_text[] = '<br><strong>Server:</strong>';
$smtp_text[] = '<strong>OpenSSL:</strong> ' . ( extension_loaded( 'openssl' ) && defined( 'OPENSSL_VERSION_TEXT' ) ? OPENSSL_VERSION_TEXT : 'No' );
if ( function_exists( 'apache_get_modules' ) ) {
$modules = apache_get_modules();
$smtp_text[] = '<strong>Apache.mod_security:</strong> ' . ( in_array( 'mod_security', $modules, true ) || in_array( 'mod_security2', $modules, true ) ? 'Yes' : 'No' );
}
if ( function_exists( 'selinux_is_enabled' ) ) {
$smtp_text[] = '<strong>OS.SELinux:</strong> ' . ( selinux_is_enabled() ? 'Yes' : 'No' );
}
if ( function_exists( 'grsecurity_is_enabled' ) ) {
$smtp_text[] = '<strong>OS.grsecurity:</strong> ' . ( grsecurity_is_enabled() ? 'Yes' : 'No' );
}
return implode( '<br>', $smtp_text );
}
/**
* Get the email addresses for the reply to email parameter.
*
* @deprecated 2.1.1
*
* @since 2.1.0
* @since 2.1.1 Not used anymore.
*
* @return array
*/
public function get_reply_to_addresses() {
_deprecated_function( __CLASS__ . '::' . __METHOD__, '2.1.1 of WP Mail SMTP plugin' );
$reply_to = $this->phpmailer->getReplyToAddresses();
// Return the passed reply to addresses, if defined.
if ( ! empty( $reply_to ) ) {
return $reply_to;
}
// Return the default reply to addresses.
return apply_filters(
'wp_mail_smtp_providers_mailer_default_reply_to_addresses',
$this->default_reply_to_addresses()
);
}
/**
* Get the default email addresses for the reply to email parameter.
*
* @deprecated 2.1.1
*
* @since 2.1.0
* @since 2.1.1 Not used anymore.
*
* @return array
*/
public function default_reply_to_addresses() {
_deprecated_function( __CLASS__ . '::' . __METHOD__, '2.1.1 of WP Mail SMTP plugin' );
return [
$this->phpmailer->From => [
$this->phpmailer->From,
$this->phpmailer->FromName,
],
];
}
/**
* Should the email sent by this mailer have its "sent status" verified via its API?
*
* @since 2.5.0
*
* @return bool
*/
public function should_verify_sent_status() {
return $this->verify_sent_status;
}
/**
* Verify the "sent status" of the provided email log ID.
* The actual verification background task is triggered in the below action hook.
*
* @since 2.5.0
*
* @param int $email_log_id The ID of the email log.
*/
public function verify_sent_status( $email_log_id ) {
if ( ! $this->should_verify_sent_status() ) {
return;
}
do_action( 'wp_mail_smtp_providers_mailer_verify_sent_status', $email_log_id, $this );
}
/**
* Get the name/slug of the current mailer.
*
* @since 2.5.0
*
* @return string
*/
public function get_mailer_name() {
return $this->mailer;
}
}