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<?php
namespace WPMailSMTP\Providers\Mailgun;
use WPMailSMTP\Debug;
use WPMailSMTP\Providers\MailerAbstract;
use WPMailSMTP\WP;
/**
* Class Mailer.
*
* @since 1.0.0
*/
class Mailer extends MailerAbstract {
/**
* Which response code from HTTP provider is considered to be successful?
*
* @since 1.0.0
*
* @var int
*/
protected $email_sent_code = 200;
/**
* API endpoint used for sites from all regions.
*
* @since 1.4.0
*
* @var string
*/
const API_BASE_US = 'https://api.mailgun.net/v3/';
/**
* API endpoint used for sites from EU region.
*
* @since 1.4.0
*
* @var string
*/
const API_BASE_EU = 'https://api.eu.mailgun.net/v3/';
/**
* URL to make an API request to.
*
* @since 1.0.0
*
* @var string
*/
protected $url = '';
/**
* @inheritdoc
*/
public function __construct( $phpmailer ) {
// Default value should be defined before the parent class contructor fires.
$this->url = self::API_BASE_US;
// We want to prefill everything from MailCatcher class, which extends PHPMailer.
parent::__construct( $phpmailer );
// We have a special API URL to query in case of EU region.
if ( 'EU' === $this->options->get( $this->mailer, 'region' ) ) {
$this->url = self::API_BASE_EU;
}
/*
* Append the url with a domain,
* to avoid passing the domain name as a query parameter with all requests.
*/
$this->url .= sanitize_text_field( $this->options->get( $this->mailer, 'domain' ) . '/messages' );
$this->set_header( 'Authorization', 'Basic ' . base64_encode( 'api:' . $this->options->get( $this->mailer, 'api_key' ) ) );
}
/**
* @inheritdoc
*/
public function set_from( $email, $name = '' ) {
if ( ! filter_var( $email, FILTER_VALIDATE_EMAIL ) ) {
return;
}
if ( ! empty( $name ) ) {
$this->set_body_param(
array(
'from' => $name . ' <' . $email . '>',
)
);
} else {
$this->set_body_param(
array(
'from' => $email,
)
);
}
}
/**
* @inheritdoc
*/
public function set_recipients( $recipients ) {
if ( empty( $recipients ) ) {
return;
}
$default = array( 'to', 'cc', 'bcc' );
foreach ( $recipients as $kind => $emails ) {
if (
! in_array( $kind, $default, true ) ||
empty( $emails ) ||
! is_array( $emails )
) {
continue;
}
$data = array();
foreach ( $emails as $email ) {
$addr = isset( $email[0] ) ? $email[0] : false;
$name = isset( $email[1] ) ? $email[1] : false;
if ( ! filter_var( $addr, FILTER_VALIDATE_EMAIL ) ) {
continue;
}
if ( ! empty( $name ) ) {
$data[] = $name . ' <' . $addr . '>';
} else {
$data[] = $addr;
}
}
if ( ! empty( $data ) ) {
$this->set_body_param(
array(
$kind => implode( ', ', $data ),
)
);
}
}
}
/**
* @inheritdoc
*/
public function set_content( $content ) {
if ( is_array( $content ) ) {
$default = array( 'text', 'html' );
foreach ( $content as $type => $mail ) {
if (
! in_array( $type, $default, true ) ||
empty( $mail )
) {
continue;
}
$this->set_body_param(
array(
$type => $mail,
)
);
}
} else {
$type = 'html';
if ( $this->phpmailer->ContentType === 'text/plain' ) {
$type = 'text';
}
if ( ! empty( $content ) ) {
$this->set_body_param(
array(
$type => $content,
)
);
}
}
}
/**
* Redefine the way custom headers are process for this mailer - they should be in body.
*
* @since 1.5.0
*
* @param array $headers
*/
public function set_headers( $headers ) {
foreach ( $headers as $header ) {
$name = isset( $header[0] ) ? $header[0] : false;
$value = isset( $header[1] ) ? $header[1] : false;
$this->set_body_header( $name, $value );
}
// Add custom PHPMailer-specific header.
$this->set_body_header( 'X-Mailer', 'WPMailSMTP/Mailer/' . $this->mailer . ' ' . WPMS_PLUGIN_VER );
}
/**
* This mailer supports email-related custom headers inside a body of the message with a special prefix "h:".
*
* @since 1.5.0
*/
public function set_body_header( $name, $value ) {
$name = sanitize_text_field( $name );
$this->set_body_param(
array(
'h:' . $name => WP::sanitize_value( $value ),
)
);
}
/**
* It's the last one, so we can modify the whole body.
*
* @since 1.0.0
*
* @param array $attachments The array of attachments data.
*/
public function set_attachments( $attachments ) {
if ( empty( $attachments ) ) {
return;
}
$payload = '';
$data = array();
foreach ( $attachments as $attachment ) {
$file = false;
/*
* We are not using WP_Filesystem API as we can't reliably work with it.
* It is not always available, same as credentials for FTP.
*/
try {
if ( is_file( $attachment[0] ) && is_readable( $attachment[0] ) ) {
$file = file_get_contents( $attachment[0] );
}
} catch ( \Exception $e ) {
$file = false;
}
if ( $file === false ) {
continue;
}
$data[] = array(
'content' => $file,
'name' => $attachment[2],
);
}
if ( ! empty( $data ) ) {
// First, generate a boundary for the multipart message.
$boundary = $this->phpmailer->generate_id();
// Iterate through pre-built params and build a payload.
foreach ( $this->body as $key => $value ) {
if ( is_array( $value ) ) {
foreach ( $value as $child_key => $child_value ) {
$payload .= '--' . $boundary;
$payload .= "\r\n";
$payload .= 'Content-Disposition: form-data; name="' . $key . "\"\r\n\r\n";
$payload .= $child_value;
$payload .= "\r\n";
}
} else {
$payload .= '--' . $boundary;
$payload .= "\r\n";
$payload .= 'Content-Disposition: form-data; name="' . $key . '"' . "\r\n\r\n";
$payload .= $value;
$payload .= "\r\n";
}
}
// Now iterate through our attachments, and add them too.
foreach ( $data as $key => $attachment ) {
$payload .= '--' . $boundary;
$payload .= "\r\n";
$payload .= 'Content-Disposition: form-data; name="attachment[' . $key . ']"; filename="' . $attachment['name'] . '"' . "\r\n\r\n";
$payload .= $attachment['content'];
$payload .= "\r\n";
}
$payload .= '--' . $boundary . '--';
// Redefine the body the "dirty way".
$this->body = $payload;
$this->set_header( 'Content-Type', 'multipart/form-data; boundary=' . $boundary );
}
}
/**
* @inheritdoc
*/
public function set_reply_to( $reply_to ) {
if ( empty( $reply_to ) ) {
return;
}
$data = array();
foreach ( $reply_to as $key => $emails ) {
if (
empty( $emails ) ||
! is_array( $emails )
) {
continue;
}
$addr = isset( $emails[0] ) ? $emails[0] : false;
$name = isset( $emails[1] ) ? $emails[1] : false;
if ( ! filter_var( $addr, FILTER_VALIDATE_EMAIL ) ) {
continue;
}
if ( ! empty( $name ) ) {
$data[] = $name . ' <' . $addr . '>';
} else {
$data[] = $addr;
}
}
if ( ! empty( $data ) ) {
$this->set_body_param(
array(
'h:Reply-To' => implode( ',', $data ),
)
);
}
}
/**
* @inheritdoc
*/
public function set_return_path( $email ) {
if (
$this->options->get( 'mail', 'return_path' ) !== true ||
! filter_var( $email, FILTER_VALIDATE_EMAIL )
) {
return;
}
$this->set_body_param(
array(
'sender' => $email,
)
);
}
/**
* 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 2.5.0
*
* @param mixed $response Response data.
*/
protected function process_response( $response ) {
parent::process_response( $response );
if (
! is_wp_error( $response ) &&
! empty( $this->response['body']->id )
) {
$this->phpmailer->MessageID = $this->response['body']->id;
$this->verify_sent_status = true;
}
}
/**
* 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.
*
* In Mailgun's case it looks like we have to check if the response body has the message ID.
* All successful API responses should have `id` key in the response body.
*
* @since 2.2.0
*
* @return bool
*/
public function is_email_sent() {
$is_sent = parent::is_email_sent();
if (
$is_sent &&
isset( $this->response['body'] ) &&
! array_key_exists( 'id', (array) $this->response['body'] )
) {
$message = 'Mailer: Mailgun' . PHP_EOL .
esc_html__( 'It looks like there\'s most likely a setup issue. Please check your WP Mail SMTP settings to see if any details might be missing or incorrect.', 'wp-mail-smtp' );
$this->error_message = $message;
Debug::set( $message );
return false;
}
return $is_sent;
}
/**
* Get a Mailgun-specific response with a helpful error.
*
* @since 1.2.0
*
* @return string
*/
public function get_response_error() {
$body = (array) wp_remote_retrieve_body( $this->response );
$error_text = array();
if ( ! empty( $body['message'] ) ) {
if ( is_string( $body['message'] ) ) {
$error_text[] = $body['message'];
} else {
$error_text[] = \json_encode( $body['message'] );
}
} elseif ( ! empty( $this->error_message ) ) {
$error_text[] = $this->error_message;
} elseif ( ! empty( $body[0] ) ) {
if ( is_string( $body[0] ) ) {
$error_text[] = $body[0];
} else {
$error_text[] = \json_encode( $body[0] );
}
}
return implode( '<br>', array_map( 'esc_textarea', $error_text ) );
}
/**
* @inheritdoc
*/
public function get_debug_info() {
$mg_text = array();
$options = new \WPMailSMTP\Options();
$mailgun = $options->get_group( 'mailgun' );
$mg_text[] = '<strong>Api Key / Domain:</strong> ' . ( ! empty( $mailgun['api_key'] ) && ! empty( $mailgun['domain'] ) ? 'Yes' : 'No' );
return implode( '<br>', $mg_text );
}
/**
* @inheritdoc
*/
public function is_mailer_complete() {
$options = $this->options->get_group( $this->mailer );
// API key is the only required option.
if (
! empty( $options['api_key'] ) &&
! empty( $options['domain'] )
) {
return true;
}
return false;
}
}