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wp-content/plugins/wp-mail-smtp/src/Providers/Gmail/Mailer.php

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+<?php
+
+namespace WPMailSMTP\Providers\Gmail;
+
+use WPMailSMTP\Debug;
+use WPMailSMTP\MailCatcher;
+use WPMailSMTP\Providers\MailerAbstract;
+
+/**
+ * Class Mailer.
+ *
+ * @since 1.0.0
+ */
+class Mailer extends MailerAbstract {
+
+	/**
+	 * URL to make an API request to.
+	 * Not used for Gmail, as we are using its API.
+	 *
+	 * @since 1.0.0
+	 *
+	 * @var string
+	 */
+	protected $url = 'https://www.googleapis.com/upload/gmail/v1/users/{userId}/messages/send';
+
+	/**
+	 * Gmail message.
+	 *
+	 * @since 1.0.0
+	 *
+	 * @var \Google_Service_Gmail_Message
+	 */
+	protected $message;
+
+	/**
+	 * Mailer constructor.
+	 *
+	 * @since 1.0.0
+	 *
+	 * @param \WPMailSMTP\MailCatcher $phpmailer
+	 */
+	public function __construct( $phpmailer ) {
+		parent::__construct( $phpmailer );
+
+		if ( ! $this->is_php_compatible() ) {
+			return;
+		}
+	}
+
+	/**
+	 * Re-use the MailCatcher class methods and properties.
+	 *
+	 * @since 1.2.0
+	 *
+	 * @param \WPMailSMTP\MailCatcher $phpmailer
+	 */
+	public function process_phpmailer( $phpmailer ) {
+		// Make sure that we have access to MailCatcher class methods.
+		if (
+			! $phpmailer instanceof MailCatcher &&
+			! $phpmailer instanceof \PHPMailer
+		) {
+			return;
+		}
+
+		$this->phpmailer = $phpmailer;
+	}
+
+	/**
+	 * Use Google API Services to send emails.
+	 *
+	 * @since 1.0.0
+	 */
+	public function send() {
+
+		// Include the Google library.
+		require_once wp_mail_smtp()->plugin_path . '/vendor/autoload.php';
+
+		$auth    = new Auth();
+		$message = new \Google_Service_Gmail_Message();
+
+		/*
+		 * Right now Gmail doesn't allow to redefine From and Sender email headers.
+		 * It always uses the email address that was used to connect to its API.
+		 * With code below we are making sure that Email Log archive and single Email Log
+		 * have the save value for From email header.
+		 */
+		$gmail_creds = $auth->get_user_info();
+
+		if ( ! empty( $gmail_creds['email'] ) ) {
+			$this->phpmailer->From   = $gmail_creds['email'];
+			$this->phpmailer->Sender = $gmail_creds['email'];
+		}
+
+		// Get the raw MIME email using MailCatcher data.
+		// We need here to make base64URL-safe string.
+		$base64 = str_replace(
+			array( '+', '/', '=' ),
+			array( '-', '_', '' ),
+			base64_encode( $this->phpmailer->getSentMIMEMessage() )
+		);
+
+		$message->setRaw( $base64 );
+
+		$service = new \Google_Service_Gmail( $auth->get_client() );
+
+		try {
+			$response = $service->users_messages->send( 'me', $message );
+
+			$this->process_response( $response );
+		} catch ( \Exception $e ) {
+			Debug::set(
+				'Mailer: Gmail' . "\r\n" .
+				$e->getMessage()
+			);
+
+			return;
+		}
+	}
+
+	/**
+	 * Save response from the API to use it later.
+	 *
+	 * @since 1.0.0
+	 * @since 1.5.0 Added action "wp_mail_smtp_providers_gmail_mailer_process_response" with $response.
+	 *
+	 * @param \Google_Service_Gmail_Message $response
+	 */
+	protected function process_response( $response ) {
+
+		$this->response = $response;
+
+		do_action( 'wp_mail_smtp_providers_gmail_mailer_process_response', $this->response, $this->phpmailer );
+	}
+
+	/**
+	 * Check whether the email was sent.
+	 *
+	 * @since 1.0.0
+	 *
+	 * @return bool
+	 */
+	public function is_email_sent() {
+
+		$is_sent = false;
+
+		if ( method_exists( $this->response, 'getId' ) ) {
+			$message_id = $this->response->getId();
+			if ( ! empty( $message_id ) ) {
+				$is_sent = true;
+			}
+		}
+
+		// Clear debug messages if email is successfully sent.
+		if ( $is_sent ) {
+			Debug::clear();
+		}
+
+		return $is_sent;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function get_debug_info() {
+
+		$gmail_text = array();
+
+		$options  = new \WPMailSMTP\Options();
+		$gmail    = $options->get_group( 'gmail' );
+		$curl_ver = 'No';
+		if ( function_exists( 'curl_version' ) ) {
+			$curl     = curl_version(); // phpcs:ignore
+			$curl_ver = $curl['version'];
+		}
+
+		$gmail_text[] = '<strong>Client ID/Secret:</strong> ' . ( ! empty( $gmail['client_id'] ) && ! empty( $gmail['client_secret'] ) ? 'Yes' : 'No' );
+		$gmail_text[] = '<strong>Auth Code:</strong> ' . ( ! empty( $gmail['auth_code'] ) ? 'Yes' : 'No' );
+		$gmail_text[] = '<strong>Access Token:</strong> ' . ( ! empty( $gmail['access_token'] ) ? 'Yes' : 'No' );
+
+		$gmail_text[] = '<br><strong>Server:</strong>';
+
+		$gmail_text[] = '<strong>OpenSSL:</strong> ' . ( extension_loaded( 'openssl' ) && defined( 'OPENSSL_VERSION_TEXT' ) ? OPENSSL_VERSION_TEXT : 'No' );
+		$gmail_text[] = '<strong>PHP.allow_url_fopen:</strong> ' . ( ini_get( 'allow_url_fopen' ) ? 'Yes' : 'No' );
+		$gmail_text[] = '<strong>PHP.stream_socket_client():</strong> ' . ( function_exists( 'stream_socket_client' ) ? 'Yes' : 'No' );
+		$gmail_text[] = '<strong>PHP.fsockopen():</strong> ' . ( function_exists( 'fsockopen' ) ? 'Yes' : 'No' );
+		$gmail_text[] = '<strong>PHP.curl_version():</strong> ' . $curl_ver; // phpcs:ignore
+		if ( function_exists( 'apache_get_modules' ) ) {
+			$modules      = apache_get_modules();
+			$gmail_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' ) ) {
+			$gmail_text[] = '<strong>OS.SELinux:</strong> ' . ( selinux_is_enabled() ? 'Yes' : 'No' );
+		}
+		if ( function_exists( 'grsecurity_is_enabled' ) ) {
+			$gmail_text[] = '<strong>OS.grsecurity:</strong> ' . ( grsecurity_is_enabled() ? 'Yes' : 'No' );
+		}
+
+		return implode( '<br>', $gmail_text );
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function is_mailer_complete() {
+
+		if ( ! $this->is_php_compatible() ) {
+			return false;
+		}
+
+		$auth = new Auth();
+
+		if (
+			$auth->is_clients_saved() &&
+			! $auth->is_auth_required()
+		) {
+			return true;
+		}
+
+		return false;
+	}
+}