OwlCyberSecurity - MANAGER

Edit File: Check_Email_SMTP_Tab.php

<?php 
defined( 'ABSPATH' ) || exit; // Exit if accessed directly

/**
 * @class Check_Email_SMTP_Tab
 * @since 1.0.12
 */
class Check_Email_SMTP_Tab {

private $smtp_options;

public function __construct() {
		$this->setup_vars();

add_action( 'check_mail_smtp_form', array($this, 'load_smtp_settings'));
		add_action('admin_init', array($this, 'smtp_form_submission_handler'));

if(isset($this->smtp_options['enable_smtp'])){
			add_action( 'phpmailer_init', array( $this,'check_mail_smtp' ) );
			add_action( 'check_mail_smtp_admin_update', array($this, 'check_credentials'));
			add_action( 'admin_notices', array( $this, 'retype_credentials_notice' ) );
			$this->check_credentials();
		}
	}

/**
	 * Get smtp options
	 *
	 * @return void
	 * @since 1.0.12
	 */
	public function setup_vars(){
		$this->smtp_options = get_option('check-email-smtp-options', true);
	}

/**
	 * PHP mailer setup for SMTP
	 *
	 * @return void
	 * @since 1.0.12
	 */
	public function check_mail_smtp( $phpmailer ) {

if( ! is_email($this->smtp_options["smtp_from"] ) || empty( $this->smtp_options["smtp_host"] ) ) {
			return;
		}

$phpmailer->Mailer = "smtp";
		$phpmailer->From = $this->smtp_options["smtp_from"];
		$phpmailer->FromName = $this->smtp_options["smtp_from_name"];
		$phpmailer->Sender = $phpmailer->From;
		$phpmailer->AddReplyTo($phpmailer->From,$phpmailer->FromName);
		$phpmailer->Host = $this->smtp_options["smtp_host"];
		$phpmailer->SMTPSecure = $this->smtp_options["smtp_secure"];
		$phpmailer->Port = $this->smtp_options["smtp_port"];
		$phpmailer->SMTPAuth = ($this->smtp_options["smtp_auth"]=="yes") ? TRUE : FALSE;

if( $phpmailer->SMTPAuth ){
			$phpmailer->Username = base64_decode( $this->smtp_options["smtp_username"] );
			$phpmailer->Password = base64_decode( $this->smtp_options["smtp_password"] );
		}
	}

/**
	 * Check for credentials
	 *
	 * @param array $options WP SMTP options
	 * 
	 * @return mixed
	 * @since 1.0.12
	 */
	public function check_credentials( $options = array(), $pass_ajax = false ) {

if ( ! is_admin() || ( ! $pass_ajax && defined( 'DOING_AJAX' ) && DOING_AJAX ) ) {
			return;
		}

$encription = get_option( 'check_email_smtp_status' );

// Connecting to host can be a resource heavy task, so we only do it if we need to.
		if ( 'encrypted' === $encription ) {
			return true;
		}

// Connecting to host can be a resource heavy task, so we only do it if we need to.
		if ( 'not_encrypted' === $encription ) {
			add_action( 'admin_notices', array( $this, 'retype_credentials_notice' ) );

return false;
		}

if ( empty( $options ) ) {
			$options = get_option( 'check-email-smtp-options' );
		}

if ( ! isset( $options['smtp_username'] ) || ! isset( $options['smtp_password'] ) || ! isset( $options['smtp_host'] ) || ! isset( $options['smtp_port'] ) || ! isset( $options['smtp_auth'] ) || ! isset( $options['smtp_secure'] ) || '' === $options['smtp_username'] || '' === $options['smtp_password'] || '' === $options['smtp_host'] || '' === $options['smtp_port'] || '' === $options['smtp_auth'] ) {
			return false;
		}

global $phpmailer;

// (Re)create it, if it's gone missing.
		if ( ! ( $phpmailer instanceof PHPMailer\PHPMailer\PHPMailer ) ) {
			require_once ABSPATH . WPINC . '/PHPMailer/PHPMailer.php';
			require_once ABSPATH . WPINC . '/PHPMailer/SMTP.php';
			require_once ABSPATH . WPINC . '/PHPMailer/Exception.php';
			$phpmailer = new PHPMailer\PHPMailer\PHPMailer( true );
		}

// Set the timeout to 15 seconds, so if it doesn't connect to not let the user in standby.
		$smtp                      = $phpmailer->getSMTPInstance();
		$smtp->Timeout             = 15;
		$smtp->Timelimit           = 15;
		$phpmailer->Timeout        = 15;
		$phpmailer->Timelimit      = 15;
		$phpmailer->Mailer         = "smtp";
		$phpmailer->Host           = $options['smtp_host'];
		$phpmailer->SMTPAuth       = 'yes' === $options['smtp_auth']; // Ask it to use authenticate using the Username and Password properties
		$phpmailer->Port           = $options['smtp_port'];
		$phpmailer->SMTPKeepAlive  = false;

if ( $phpmailer->SMTPAuth ) {
			$phpmailer->Username = base64_decode($options['smtp_username']);
			$phpmailer->Password = base64_decode($options['smtp_password']);
		}

$phpmailer->SMTPSecure = $options['smtp_secure']; // preferable but optional

try {
			if ( $phpmailer->smtpConnect() ) {
				update_option( 'check_email_smtp_status', 'encrypted' );
				return true;
			} else {
				update_option( 'check_email_smtp_status', 'not_encrypted' );
				return false;
			}
		} catch ( Exception $e ) {
			update_option( 'check_email_smtp_status', 'not_encrypted' );
			return false;
		}
	}

/**
	 * Render SMTP form
	 *
	 * @return void
	 * @since 1.0.12
	 */
	public function load_smtp_settings(){
		$enable_smtp = isset($this->smtp_options['enable_smtp'])?$this->smtp_options['enable_smtp']:'';
		$smtp_checked = "";
		$style = "display: none";
		if($enable_smtp == 'on'){
			$smtp_checked = "checked";
			$style = "";
		}
	?>
		<form action="" method="post" >
			<div id="check-mail-smtp-wrapper">
				<table class="form-table" role="presentation">
					<tbody>
						<tr class="check_email_enable_smtp">
						    <th scope="row"><label for="check-email-enable-smtp" class="check-email-opt-labels"><?php esc_html_e( 'SMTP', 'check-email' ); ?></label></th>
						    <td>
						        <input id="check-email-enable-smtp" type="checkbox" name="check-email-smtp-options[enable_smtp]" <?php echo esc_attr($smtp_checked); ?>>
						        <?php esc_html_e('SMTP helps you to send emails via SMTP instead of the PHP mail()','check-email'); ?>
						    </td>
						</tr>
					</tbody>
					
					<tbody id="check-email-smtp-form" style="<?php echo esc_attr($style); ?>">	
						<tr class="check_email_smtp_from">
						    <th scope="row"><?php esc_html_e('From', 'check-email'); ?></th>
						    <td>
						        <input id="check-email-smtp-from" type="text" name="check-email-smtp-options[smtp_from]" value="<?php echo isset($this->smtp_options['smtp_from'])?esc_attr($this->smtp_options['smtp_from']):"" ?>" size="35">
						    </td>
						</tr>
						<tr class="check_email_smtp_from_name">
						    <th scope="row"><?php esc_html_e('From Name', 'check-email'); ?></th>
						    <td>
						        <input id="check-email-smtp-from-name" type="text" name="check-email-smtp-options[smtp_from_name]" size="35" value="<?php echo isset($this->smtp_options['smtp_from_name'])?esc_attr($this->smtp_options['smtp_from_name']):"" ?>">
						    </td>
						</tr>
						<tr class="check_email_smtp_host">
						    <th scope="row"><?php esc_html_e('SMTP Host', 'check-email'); ?></th>
						    <td>
						        <input id="check-email-smtp-host" type="text" name="check-email-smtp-options[smtp_host]" value="<?php echo isset($this->smtp_options['smtp_host'])?esc_attr($this->smtp_options['smtp_host']):"" ?>" size="35">
						    </td>
						</tr>
						<tr class="check_email_smtp_secure">
						    <th scope="row"><?php esc_html_e('SMTP Secure', 'check-email'); ?></th>
						    <td>
						    	<?php 
						    	$secure_array = array('None' => '', 'SSL' => 'ssl', 'TLS' => 'tls');
						    	$field_value = isset($this->smtp_options['smtp_secure'])?$this->smtp_options['smtp_secure']:"";
								foreach ($secure_array as $sa_key => $sa_value) {
									$checked = '';
									$id = 'check-email-smtp-secure';
									if($sa_value == 'ssl'){
										$id = 'check-email-smtp-secure-ssl';
									}else if($sa_value == 'tls'){
										$id = 'check-email-smtp-secure-tls';
									} 
									if($field_value == $sa_value){
										$checked = 'checked';
									}

?>
									<label for="<?php echo esc_attr($id); ?>" class="check-mail-smtp-secure-label">
						            <input id="<?php echo esc_attr($id); ?>" type="radio" name="check-email-smtp-options[smtp_secure]" value="<?php echo esc_attr($sa_value); ?>" <?php echo esc_attr($checked); ?>> <?php echo esc_html($sa_key); ?> </label>
						            <?php
								}
						    	?>
						    </td>
						</tr>
						<tr class="check_email_smtp_port">
							<?php $smtp_port = isset($this->smtp_options['smtp_port'])?$this->smtp_options['smtp_port']:""; ?>
						    <th scope="row"><?php esc_html_e('SMTP Port', 'check-email'); ?></th>
						    <td>
						        <input id="check-email-smtp-port" type="text" name="check-email-smtp-options[smtp_port]" value="<?php echo esc_attr($smtp_port) ?>" size="35">
						    </td>
						</tr>
						<tr class="check_email_smtp_auth">
						    <th scope="row"><?php esc_html_e('SMTP Authentication', 'check-email'); ?></th>
						    <td>
						    	<?php
						    	$secure_array = array('No' => 'no', 'Yes' => 'yes');
						    	$field_value = isset($this->smtp_options['smtp_auth'])?$this->smtp_options['smtp_auth']:"yes";

foreach ($secure_array as $sa_key => $sa_value) {
									$checked = '';
									$id = 'check-email-smtp-secure-yes';
									if($sa_value == 'no'){
										$id = 'check-email-smtp-secure-no';
									} 
									if($field_value == $sa_value){
										$checked = 'checked';
									}
									?>
									<label for="<?php echo esc_attr($id); ?>" class="check-mail-smtp-secure-label">
						            <input id="<?php echo esc_attr($id); ?>" type="radio" name="check-email-smtp-options[smtp_auth]" value="<?php echo esc_attr($sa_value); ?>" <?php echo esc_attr($checked); ?>> <?php echo esc_html($sa_key); ?> </label>
									<?php
								}
								?>
						    </td>
						</tr>
						<tr class="check_email_smtp_username">
						    <th scope="row"><?php esc_html_e('Username', 'check-email'); ?></th>
						    <?php $smtp_username = isset($this->smtp_options['smtp_username'])?base64_decode($this->smtp_options['smtp_username']):''; ?>
						    <td>
						        <input id="check-email-smtp-username" type="text" name="check-email-smtp-options[smtp_username]" value="<?php echo esc_attr($smtp_username); ?>" size="35">
						    </td>
						</tr>
						<tr class="check_email_smtp_password">
						    <th scope="row"><?php esc_html_e('Password', 'check-email'); ?></th>
						     <?php $smtp_password = isset($this->smtp_options['smtp_password'])?base64_decode($this->smtp_options['smtp_password']):''; ?>
						    <td>
						        <input id="check-email-smtp-password" type="password" name="check-email-smtp-options[smtp_password]" value="<?php echo esc_attr($smtp_password); ?>" size="35">
						    </td>
						</tr>
					</tbody>
				</table>
			</div>
			<?php wp_nonce_field('check_mail_smtp_nonce','check_mail_smtp_nonce'); ?>
			<p class="submit"><input type="submit" name="check_mail_smtp_submit" id="check_mail_smtp_submit" class="button button-primary" value="Save"></p>
		</form>
	<?php
	}

/**
	 * Save SMTP options
	 *
	 * @return void
	 * @since 1.0.12
	 */

public function smtp_form_submission_handler(){
		if(isset($_POST['check_mail_smtp_submit']) && $_POST['check_mail_smtp_submit'] == 'Save'){
			if(!isset($_POST['check_mail_smtp_nonce'])){
		    	return;
		    }

if ( !wp_verify_nonce( $_POST['check_mail_smtp_nonce'], 'check_mail_smtp_nonce' ) ){
	       		return;  
	    	}

if ( ! current_user_can( 'manage_check_email' ) ) {
				return;
			}

$smtp_opt = array_map('sanitize_text_field', $_POST['check-email-smtp-options']);

if(isset($smtp_opt['smtp_username']) && !empty($smtp_opt['smtp_username'])){
				$smtp_opt['smtp_username'] = base64_encode($smtp_opt['smtp_username']);
			}
			if(isset($smtp_opt['smtp_password']) && !empty($smtp_opt['smtp_password'])){
				$smtp_opt['smtp_password'] = base64_encode($smtp_opt['smtp_password']);
			}

update_option('check-email-smtp-options', $smtp_opt);

delete_option( 'check_email_smtp_status' );
			do_action( 'check_mail_smtp_admin_update' );

wp_redirect(admin_url('admin.php?page=check-email-settings&tab=smtp'));
		}
	}	
	
	/**
	 * Add notice to retype credentials and info about the server
	 *
	 * @return void
	 * @since 1.0.12
	 */
	public function retype_credentials_notice() {

$status = get_option( 'check_email_smtp_status' );

if ( ! $status || 'not_encrypted' !== $status) {
			return;
		}

?>
		<div class="notice notice-error is-dismissible">
			<h3><?php esc_html_e( 'Check Mail SMTP connection error', 'check-email' ); ?></h3>
			<p><?php esc_html_e( 'Seems like there are some problems with the enterd information. Please re-check & re-enter it and hit the "Save changes" button.', 'check-email' ); ?></p>
		</div>
		<?php
	}
}
new Check_Email_SMTP_Tab();