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Edit File: class-lp-email.php

<?php
/**
 * Class Email.
 *
 * @author   ThimPress
 * @category Widgets
 * @package  Learnpress/Email
 * @since 3.0.0
 * @version  3.0.2
 */

/**
 * Prevent loading this file directly
 */
defined( 'ABSPATH' ) || exit();

if ( ! class_exists( 'LP_Email' ) ) {

/**
	 * Class LP_Email
	 */
	class LP_Email extends LP_Abstract_Settings {
		/**
		 * Email method ID.
		 *
		 * @var String
		 */
		public $id;

/**
		 * Email method title.
		 *
		 * @var string
		 */
		public $title;

/**
		 * 'yes' if the method is enabled.
		 *
		 * @var string
		 */
		public $enabled;

/**
		 * Description for the email.
		 *
		 * @var string
		 */
		public $description;

/**
		 * Plain text template path.
		 *
		 * @var string
		 */
		public $template_plain;

/**
		 * HTML template path.
		 *
		 * @var string
		 */
		public $template_html = '';

/**
		 * Template path.
		 *
		 * @var string
		 */
		public $template_base = '';

/**
		 * Recipients for the email.
		 *
		 * @var string
		 */
		public $recipient;

/**
		 * @var bool Enable recipients
		 *
		 * @since 4.2.6.4
		 */
		public $enable_recipients = false;

/**
		 * For send CC or BB email.
		 *
		 * @var string
		 */
		public $recipients = '';

/**
		 * Heading for the email content.
		 *
		 * @var string
		 */
		public $heading = '';

/**
		 * Subject for the email.
		 *
		 * @var string
		 */
		public $subject;

/**
		 * Default heading for the email content.
		 *
		 * @var string
		 */
		public $default_heading;

/**
		 * Default subject for the email.
		 *
		 * @var string
		 */
		public $default_subject;

/**
		 * Default content for the email.
		 *
		 * @var string
		 */
		public $content;

/**
		 * Object this email is for, for example a customer, product, or email.
		 *
		 * @var object
		 */
		public $object;

/**
		 * Strings to find in subjects/headings.
		 *
		 * @var array
		 */
		public $find;

/**
		 * Strings to replace in subjects/headings.
		 *
		 * @var array
		 */
		public $replace;

/**
		 * Mime boundary (for multipart emails).
		 *
		 * @var string
		 */
		public $mime_boundary;

/**
		 * Mime boundary header (for multipart emails).
		 *
		 * @var string
		 */
		public $mime_boundary_header;

/**
		 * True when email is being sent.
		 *
		 * @var bool
		 */
		public $sending;

public $debug = false;

protected $_object_loaded = false;

/**
		 *  List of preg* regular expression patterns to search for,
		 *  used in conjunction with $replace.
		 *  https://raw.github.com/ushahidi/wp-silcc/master/class.html2text.inc
		 *
		 * @var array $search
		 * @see $replace
		 */
		public $plain_search = array(
			"/\r/",                                          // Non-legal carriage return
			'/&(nbsp|#160);/i',                              // Non-breaking space
			'/&(quot|rdquo|ldquo|#8220|#8221|#147|#148);/i', // Double quotes
			'/&(apos|rsquo|lsquo|#8216|#8217);/i',           // Single quotes
			'/&gt;/i',                                       // Greater-than
			'/&lt;/i',                                       // Less-than
			'/&#38;/i',                                      // Ampersand
			'/&#038;/i',                                     // Ampersand
			'/&amp;/i',                                      // Ampersand
			'/&(copy|#169);/i',                              // Copyright
			'/&(trade|#8482|#153);/i',                       // Trademark
			'/&(reg|#174);/i',                               // Registered
			'/&(mdash|#151|#8212);/i',                       // mdash
			'/&(ndash|minus|#8211|#8722);/i',                // ndash
			'/&(bull|#149|#8226);/i',                        // Bullet
			'/&(pound|#163);/i',                             // Pound sign
			'/&(euro|#8364);/i',                             // Euro sign
			'/&#36;/',                                       // Dollar sign
			'/&[^&\s;]+;/i',                                 // Unknown/unhandled entities
			'/[ ]{2,}/',                                      // Runs of spaces, post-handling
		);

/**
		 *  List of pattern replacements corresponding to patterns searched.
		 *
		 * @var array $replace
		 * @see $search
		 */
		public $plain_replace = array(
			'',                                             // Non-legal carriage return
			' ',                                            // Non-breaking space
			'"',                                            // Double quotes
			"'",                                            // Single quotes
			'>',                                            // Greater-than
			'<',                                            // Less-than
			'&',                                            // Ampersand
			'&',                                            // Ampersand
			'&',                                            // Ampersand
			'(c)',                                          // Copyright
			'(tm)',                                         // Trademark
			'(R)',                                          // Registered
			'--',                                           // mdash
			'-',                                            // ndash
			'*',                                            // Bullet
			'�',                                            // Pound sign
			'EUR',                                          // Euro sign. � ?
			'$',                                            // Dollar sign
			'',                                             // Unknown/unhandled entities
			' ',                                             // Runs of spaces, post-handling
		);

/**
		 * List of pattern search corresponding to patterns replace.
		 *
		 * @var array text shortcode
		 */
		public $text_search = array();

/**
		 * List of pattern to replace
		 *
		 * @var array text replace
		 */
		public $text_replace = array();

/**
		 * Text message description
		 *
		 * @var string
		 */
		public $email_text_message_description = '';

/**
		 * @var string
		 */
		public $template_path = '';

/**
		 * @var null
		 */
		public $variables = array();

/**
		 * @var array|null
		 */
		//public $basic_variables = array();

/**
		 * @var null
		 */
		public $general_variables = [];

/**
		 * @var null
		 */
		public $support_variables = [];

/**
		 * @var LP_Settings
		 */
		public $settings = null;

/**
		 * @var string
		 */
		public $email_format = 'html';

/**
		 * @var bool
		 */
		public $enable = false;

/**
		 * @var string
		 */
		public $group = '';

/**
		 * @var string
		 */
		protected $_option_id = '';

/**
		 * LP_Email constructor.
		 */
		public function __construct() {
			// Set template base path to LP templates path if it is not set.
			if ( empty( $this->template_base ) ) {
				$this->template_base = LearnPress::instance()->plugin_path( 'templates/' );
			}

/**
			 * Set template folder if it is not set. Default is 'learnpress'
			 */
			if ( empty( $this->template_path ) ) {
				$this->template_path = learn_press_template_path();
			}

if ( empty( $this->template_html ) ) {
				$this->template_html = "emails/{$this->id}.php";
			}

if ( empty( $this->template_plain ) ) {
				$this->template_plain = "emails/plain/{$this->id}.php";
			}

if ( ! $this->object ) {
				$this->object = array();
			}

$this->_option_id = 'emails_' . $this->id;

$this->settings = LP_Settings::instance()->get_group( $this->_option_id, '' );

/**
			 * Init general options
			 */
			$this->heading    = $this->settings->get( 'heading', $this->default_heading );
			$this->subject    = $this->settings->get( 'subject', $this->default_subject );
			$this->enable     = $this->settings->get( 'enable', 'no' ) === 'yes';

if ( $this->settings->get( 'email_content.format' ) ) {
				$this->email_format = ( $this->settings->get( 'email_content.format' ) == 'plain_text' ) ? 'plain' : 'html';
			} else {
				if ( LP_Settings::instance()->get( 'emails_general.default_email_content' ) ) {
					$this->email_format = LP_Settings::instance()->get( 'emails_general.default_email_content' );
				}
			}

$email_formats = array( 'plain', 'html' );
			if ( ! in_array( $this->email_format, $email_formats ) ) {
				$this->email_format = 'html';
			}

// Set type variables can click add to content of email setting.
			$this->support_variables = $this->general_variables = [
				'{{site_url}}',
				'{{site_title}}',
				'{{login_url}}',
				'{{email_heading}}',
				'{{site_admin_email}}',
				'{{site_admin_name}}',
				'{{header}}',
				'{{footer}}',
				'{{footer_text}}',
			];
		}

/**
		 * @param null $value
		 *
		 * @return bool
		 */
		public function enable( $value = null ): bool {
			if ( is_bool( $value ) ) {
				$this->enable = $value;

// Load default settings if the email is not configured
				if ( ! $this->is_configured() ) {
					$settings = $this->get_settings();

foreach ( $settings as $field ) {
						if ( $field['type'] == 'heading' || $field['type'] == 'title' || $field['type'] == 'sectionend' ) {
							continue;
						}

$id = str_replace( $this->_option_id, '', $field['id'] );
						$id = str_replace( array( '[', ']' ), '', $id );

if ( $id == 'email_content' ) {
							$this->settings->set(
								'email_content',
								array(
									'format' => 'html',
									'plain'  => lp_get_email_content( 'plain', '', $field ),
									'html'   => lp_get_email_content( 'html', '', $field ),
								)
							);
						} else {
							$this->settings->set( $id, $field['default'] );
						}
					}
				}
				$this->settings->set( 'enable', $value ? 'yes' : 'no' );
				$this->settings->update( 'learn_press_' . $this->_option_id, $this->settings->get() );
			}

return $this->enable;
		}

/**
		 * @return mixed
		 */
		public function is_configured() {
			return LP_Settings::instance()->get( $this->_option_id );
		}

/**
		 * Get variables support in mail.
		 *
		 * @return mixed
		 */
		public function get_variables_support() {
			return apply_filters( 'learn-press/email-variables-support', $this->support_variables, $this );
		}

/**
		 * Magic function
		 *
		 * @param $key
		 *
		 * @return mixed
		 */
		public function __get( $key ) {
			if ( ! empty( $this->{$key} ) ) {
				return $this->{$key};
			} else {
				return $this->settings->get( $key );
			}
		}

/**
		 * @return bool
		 */
		private function is_current() {
			return ! empty( $_REQUEST['section'] ) && sanitize_text_field( $_REQUEST['section'] ) == $this->id;
		}

/**
		 * @param $options
		 * @param $key
		 *
		 * @return bool
		 */
		public function _remove_email_content_from_option( $options, $key ) {
			if ( ! $this->is_current() ) {
				return false;
			}

if ( is_array( $options ) && ( array_key_exists( 'email_content_html', $options ) || array_key_exists( 'email_content_plain', $options ) ) ) {

if ( array_key_exists( 'email_content_html', $options ) ) {
					$this->save_template( $options['email_content_html'], $this->template_html );
					unset( $options['email_content_html'] );
				}

if ( array_key_exists( 'email_content_plain', $options ) ) {
					$this->save_template( $options['email_content_plain'], $this->template_plain );
					unset( $options['email_content_plain'] );
				}
			}

return $options;
		}

/**
		 * Apply the value of variables for string
		 *
		 * @param string $string
		 *
		 * @return string
		 * @editor tungnx
		 */
		public function format_string( string $string ): string {
			//$this->_maybe_get_object();

$search = $replace = array();
			if ( is_array( $this->variables ) ) {
				$search  = array_keys( $this->variables );
				$replace = array_values( $this->variables );
			}
			$search  = apply_filters( 'learn-press/email-format-string-find', $search, $this );
			$replace = apply_filters( 'learn-press/email-format-string-replace', $replace, $this );

return str_replace( $search, $replace, $string );
		}

/**
		 * Get email recipient.
		 *
		 * @return string
		 */
		public function get_recipient() {
			return apply_filters( 'learn-press/email-recipient-' . $this->id, $this->recipient, $this->object );
		}

/**
		 * Get email subject.
		 *
		 * @return string
		 */
		public function get_subject(): string {
			return $this->format_string( $this->subject );
		}

/**
		 * Get email content.
		 *
		 * @return string
		 * @editor tungnx
		 */
		public function get_content(): string {
			$email_format = $this->get_email_format();

if ( 'plain' == $email_format ) {
				$email_content = preg_replace( $this->plain_search, $this->plain_replace, strip_tags( $this->get_content_plain() ) );
			} elseif ( in_array( $email_format, array( 'html', 'multipart' ) ) ) {
				$email_content = $this->get_content_html();
			} else {
				$email_content = preg_replace( $this->text_search, $this->text_replace, $this->get_content_text_message() );
			}

$email_content = $this->format_string( $email_content );

return wordwrap( $email_content, 70 );
		}

/**
		 * Get email heading.
		 *
		 * @return string
		 */
		public function get_heading(): string {
			return $this->format_string( $this->heading );
		}

/**
		 * Get email footer text.
		 *
		 * @return string
		 */
		public function get_footer_text(): string {
			$text = LP_Settings::instance()->get( 'emails_general.footer_text', 'LearnPress' );

return LP_Helper::sanitize_params_submitted( $text, 'html' );
		}

/**
		 * Get email content HTML.
		 *
		 * @return string
		 */
		public function get_content_html(): string {
			$template      = $this->get_template( 'template_html' );
			$template_file = $this->template_base . $template;
			$content       = $this->settings->get( 'email_content.html', file_get_contents( $template_file ) );

return stripslashes( $content );
		}

/**
		 * Get email content plain.
		 *
		 * @return string
		 */
		public function get_content_plain(): string {
			$template      = $this->get_template( 'template_plain' );
			$template_file = $this->template_base . $template;
			$content_tmp   = LP_WP_Filesystem::instance()->file_get_contents( $template_file );
			$content       = $this->settings->get( 'email_content.plain', $content_tmp );
			$content       = stripslashes( $content );

return $content;
		}

/**
		 * Get content context message.
		 *
		 * @return string
		 */
		public function get_content_text_message(): string {
			return apply_filters( 'learn-press/email-text-message-' . $this->id, $this->settings->get( 'content_text_message' ) );
		}

/**
		 * Get email headers.
		 *
		 * @return string|array
		 */
		public function get_headers() {
			$headers = [
				'Content-Type: ' . $this->get_content_format() . "\r\n",
			];

$recipients = $this->settings->get( 'recipients', $this->recipients );

if ( ! empty( $recipients ) ) {
				$cc_emails = explode( ',', $recipients );
				foreach ( $cc_emails as $cc_email ) {
					$headers[] = 'Cc: ' . $cc_email;
				}
			}

return apply_filters( 'learn-press/email-headers', $headers, $this );
		}

/**
		 * Get email attachments.
		 *
		 * @return array
		 */
		public function get_attachments() {
			return apply_filters( 'learn-press/email-attachments', array(), $this->id, $this->object );
		}

/**
		 * Get FROM address. Default is admin email.
		 *
		 * @return string
		 * @editor tungnx
		 * @version 1.0.1
		 * @editor tungnx
		 * @modify 4.1.4 - comment - not override hook
		 */
		/*public function get_from_address(): string {
			$email = LP_Settings::instance()->get( 'emails_general.from_email', get_option( 'admin_email' ) );

return sanitize_email( $email );
		}*/

/**
		 * Get FROM name. Default is Blog name.
		 *
		 * @return string
		 * @editor tungnx
		 * @version 1.0.1
		 */
		public function get_from_name(): string {
			$name = LP_Settings::instance()->get( 'emails_general.from_name', get_option( 'blogname' ) );

return LP_Helper::sanitize_params_submitted( $name );
		}

/**
		 * Get WP Blog name.
		 *
		 * @return string
		 */
		public function get_blogname() {
			return wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
		}

/**
		 * Get email content format.
		 *
		 * @return string
		 */
		public function get_content_format() {
			switch ( $this->get_email_format() ) {
				case 'text_message':
				case 'html':
					return 'text/html';
				case 'multipart':
					return 'multipart/alternative';
				default:
					return 'text/plain';
			}
		}

/**
		 * @return string
		 */
		public function get_email_format() {
			return $this->email_format && class_exists( 'DOMDocument' ) ? $this->email_format : 'plain';
		}

/**
		 * Apply css from external to inline.
		 *
		 * @param string $content
		 *
		 * @return string
		 */
		public function apply_style_inline( $content ) {
			if ( in_array( $this->get_content_format(), array(
					'text/html',
					'multipart/alternative'
				) ) && class_exists( 'DOMDocument' ) ) {

// get CSS styles
				ob_start();
				learn_press_get_template( 'emails/email-styles.php' );
				$css = apply_filters( 'learn_press_email_styles', ob_get_clean(), $this->id, $this );

try {
					if ( ! class_exists( 'Emogrifier' ) ) {
						include_once LP_PLUGIN_PATH . 'inc/libraries/class-emogrifier.php';
					}
					// apply CSS styles inline for picky email clients
					$emogrifier = new Emogrifier( $content, $css );
					$content    = $emogrifier->emogrify();

} catch ( Exception $e ) {

}
			}

return apply_filters( 'learn-press/email-content-inline-style', $content, $this->id );
		}

/**
		 * Get template file from type.
		 *
		 * @param string $type
		 *
		 * @return string
		 */
		public function get_template( $type ) {
			$type = esc_attr( basename( $type ) );

if ( 'template_html' == $type ) {
				return $this->template_html;
			} elseif ( 'template_plain' == $type ) {
				return $this->template_plain;
			}

return '';
		}

protected function save_template( $code, $path ) {
			return;
		}

/**
		 * Get template file.
		 *
		 * @param string $template
		 * @param string $template_path
		 *
		 * @return string
		 */
		public function get_theme_template_file( $template, $template_path = null ) {
			$template_dir = apply_filters( 'learn-press/template-directory', $template_path ? $template_path : learn_press_template_path(), $template );

return join(
				'',
				array(
					trailingslashit( get_stylesheet_directory() ),
					trailingslashit( $template_dir ),
					$template,
				)
			);
		}

/**
		 * Send email.
		 *
		 * @param string|array $to
		 * @param string $subject
		 * @param string $message
		 * @param string|string[] $headers
		 * @param array $attachments
		 *
		 * @editor tungnx
		 * @return bool
		 * @version 1.0.1
		 *
		 */
		public function send( $to, string $subject, string $message, $headers, array $attachments ): bool {
			$return  = false;
			$message = apply_filters( 'learn-press/email-content', $this->apply_style_inline( $message ), $this );

if ( is_string( $to ) ) {
				$to = preg_split( '~\s?,\s?~', $to );

$return = wp_mail( $to, $subject, $message, $headers, $attachments );
			} elseif ( is_array( $to ) ) {
				foreach ( $to as $t ) {
					$return = wp_mail( $t, $subject, $message, $headers, $attachments );
				}
			}

return $return;
		}

/**
		 * Get all values set and send email
		 *
		 * @author tungnx
		 * @since 4.1.3
		 */
		public function send_email(): bool {
			add_filter( 'wp_mail_from_name', array( $this, 'get_from_name' ) );
			add_filter( 'wp_mail_content_type', array( $this, 'get_content_format' ) );

return $this->send( $this->get_recipient(), $this->get_subject(), $this->get_content(), $this->get_headers(), $this->get_attachments() );
		}

/**
		 * Get common variables.
		 * Variables use for click add to content of Email
		 *
		 * @param string $format
		 *
		 * @return array
		 * @author tungnx
		 * @since 4.1.1
		 */
		public function get_common_variables( string $format = 'plain' ): array {
			$heading     = strip_tags( $this->get_heading() );
			$footer_text = strip_tags( $this->get_footer_text() );

$header = $heading;
			$footer = $footer_text;

if ( $format != 'plain' ) {
				$header = $this->email_header( $heading, false );
				$footer = $this->email_footer( $footer_text, false );
			}

$admin_user = get_user_by( 'email', get_option( 'admin_email' ) );

return apply_filters(
				'email_variables_common',
				[
					'{{header}}'           => $header,
					'{{footer}}'           => $footer,
					'{{footer_text}}'      => $footer_text,
					'{{site_url}}'         => get_home_url(),
					'{{site_title}}'       => $this->get_blogname(),
					'{{site_admin_email}}' => get_option( 'admin_email' ),
					'{{site_admin_name}}'  => learn_press_get_profile_display_name( $admin_user ),
					'{{login_url}}'        => learn_press_get_login_url(),
					'{{plain_text}}'       => $format == 'plain',
				]
			);
		}

/**
		 * @param string $name
		 *
		 * @return string
		 */
		public function get_field_name( $name ) {
			return $this->_option_id . "[$name]";
		}

/**
		 * Default options for all emails.
		 * Almost the emails are the same with options.
		 *
		 * @return array
		 */
		protected function _default_settings(): array {
			/**
			 * In case the email is not for sending to specific admin (like user who has bought course or author of course, etc..)
			 * So, we do not need this field.
			 */

$enable_recipients = $this->enable_recipients;

$default = array_merge(
				array(
					array(
						'type' => 'title',
					),
					array(
						'title'   => esc_html__( 'Enable/Disable', 'learnpress' ),
						'type'    => 'checkbox',
						'default' => 'no',
						'id'      => $this->get_field_name( 'enable' ),
						'desc'    => $this->description,
					),
				),
				$enable_recipients ? array(
					array(
						'title'   => esc_html__( 'Recipient(s)', 'learnpress' ),
						'type'    => 'text',
						'default' => $this->recipients,
						'id'      => $this->get_field_name( 'recipients' ),
						'desc'    => esc_html__( 'Separate other recipients with commas.', 'learnpress' ),
					),
				) : array(),
				array(
					array(
						'title'   => esc_html__( 'Subject', 'learnpress' ),
						'type'    => 'text',
						'default' => $this->default_subject,
						'id'      => $this->get_field_name( 'subject' ),
						'css'     => 'width:400px',
					),
					array(
						'title'   => esc_html__( 'Email heading', 'learnpress' ),
						'type'    => 'text',
						'default' => $this->default_heading,
						'id'      => $this->get_field_name( 'heading' ),
						'css'     => 'width:400px',
					),
					array(
						'title'                => esc_html__( 'Content type', 'learnpress' ),
						'type'                 => 'email-content',
						'default'              => '',
						'id'                   => $this->get_field_name( 'email_content' ),
						'template_base'        => $this->template_base,
						'template_path'        => $this->template_path,
						'template_html'        => $this->template_html,
						'template_plain'       => $this->template_plain,
						'template_html_local'  => $this->get_theme_template_file( 'html', $this->template_path ),
						'template_plain_local' => $this->get_theme_template_file( 'plain', $this->template_path ),
						'support_variables'    => $this->get_variables_support(),
					),
					array(
						'type' => 'sectionend',
					),
				)
			);

return $default;
		}

/**
		 * Get settings in admin.
		 *
		 * @return bool|mixed
		 * @since 3.0.0
		 *
		 */
		public function get_settings() {
			return apply_filters( 'learn-press/email-settings/' . $this->id . '/settings', $this->_default_settings() );
		}

/**
		 * Get instructors to send mail.
		 *
		 * @param null $order_id
		 *
		 * @return array
		 * @since 3.0.0
		 *
		 */
		public function get_order_instructors( $order_id ) {
			if ( ! $order_id ) {
				return array();
			}

$order = learn_press_get_order( $order_id );

$items       = $order->get_items();
			$instructors = array();

if ( count( $items ) ) {
				foreach ( $items as $item ) {
					if ( ! isset( $item['course_id'] ) ) {
						continue;
					}

$user_id = get_post_field( 'post_author', $item['course_id'] );
					if ( $user_id ) {
						$instructors[] = $user_id;
					}
				}
			}

return $instructors;
		}

protected function _get_admin_email() {
			return apply_filters( 'learn-press/email/admin-email', get_option( 'admin_email' ) );
		}

/**
		 * @return string
		 */
		public function __toString() {
			return $this->title;
		}

/**
		 * Get image header in general settings.
		 *
		 * @return string
		 */
		public function get_image_header(): string {
			$image = LP_Settings::instance()->get( 'emails_general.header_image', '' );

if ( ! empty( $image ) ) {
				$image = wp_get_attachment_image_url( $image, 'full' );
			}

return $image;
		}

/**
		 * Email header.
		 *
		 * @param string $heading
		 * @param bool $echo
		 *
		 * @return string
		 */
		public function email_header( string $heading, bool $echo = true ): string {
			ob_start();
			learn_press_get_template(
				'emails/email-header.php',
				[
					'email_heading' => $heading,
					'image_header'  => $this->get_image_header(),
				]
			);
			$header = ob_get_clean();

if ( $echo ) {
				echo wp_kses_post( $header );
			}

return $header;
		}

/**
		 * Email footer.
		 *
		 * @param string $footer_text
		 * @param bool $echo
		 *
		 * @return string
		 */
		public function email_footer( string $footer_text, bool $echo = true ): string {
			ob_start();
			learn_press_get_template( 'emails/email-footer.php', array( 'footer_text' => $footer_text ) );
			$footer = ob_get_clean();

if ( $echo ) {
				echo wp_kses_post( $footer );
			}

return $footer;
		}

/**
		 * Set receive email
		 *
		 * @param string $receive_email
		 */
		public function set_receive( string $receive_email ) {
			$this->recipient = $receive_email;
		}

/**
		 * Method called by background on LP_Background_Single_Email
		 *
		 * @param array $params
		 *
		 * @see LP_Background_Single_Email::handle()
		 *
		 */
		public function handle( array $params ) {

}
	}
}