/wp-content/plugins/learnpress/inc/emails/class-lp-email.php

<?php



/**

 * Class LP_Email

 *

 * @author  ThimPress

 * @package LearnPress/Classes

 * @version 1.0

 */



defined( 'ABSPATH' ) || exit();



class LP_Email {

	/**

	 * 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;



	/**

	 * 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;



	/**

	 * 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;



	/**

	 *  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

	);





	function __construct() {

		$this->id = str_replace( '-', '_', $this->id );

		if ( is_null( $this->template_base ) ) {

			$this->template_base = LP()->plugin_path( 'templates/' );

		}

		if ( $this->is_current() ) {

			add_filter( 'learn_press_update_option_value', array( $this, '_remove_email_content_from_option' ), 99, 2 );

			$this->template_actions();

		}



		$this->heading      = LP()->settings->get( 'emails_' . $this->id . '.heading', $this->default_heading );

		$this->subject      = LP()->settings->get( 'emails_' . $this->id . '.subject', $this->default_subject );

		$this->email_format = LP()->settings->get( 'emails_' . $this->id . '.email_format' );

		$this->enable       = LP()->settings->get( 'emails_' . $this->id . '.enable' ) == 'yes';

	}



	function __get( $key ) {

		if ( !empty( $this->{$key} ) ) {

			return $this->{$key};

		} else {

			return LP()->settings->get( 'emails_' . $this->id . '.' . $key );

		}

	}



	private function is_current() {



		return !empty( $_REQUEST['section'] ) && $_REQUEST['section'] == $this->id;

	}



	function _remove_email_content_from_option( $options, $key ) {



		if ( !$this->is_current() ) {

			return;

		}



		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;

	}



	protected function template_actions() {

		if (

			( !empty( $this->template_html ) || !empty( $this->template_plain ) )

			&& ( !empty( $_GET['move_template'] ) || !empty( $_GET['delete_template'] ) )

			&& 'GET' == $_SERVER['REQUEST_METHOD']

		) {

			if ( empty( $_GET['_learn_press_email_nonce'] ) || !wp_verify_nonce( $_GET['_learn_press_email_nonce'], 'learn_press_email_template_nonce' ) ) {

				return;

			}



			if ( !current_user_can( 'edit_themes' ) ) {

				return;

			}



			if ( !empty( $_GET['move_template'] ) ) {

				$this->move_template( $_GET['move_template'] );

			}



			if ( !empty( $_GET['delete_template'] ) ) {

				$this->delete_template( $_GET['delete_template'] );

			}

		}

	}



	protected function move_template( $type ) {

		if ( $template = $this->get_template( 'template_' . $type ) ) {

			if ( !empty( $template ) ) {

				$theme_file = $this->get_theme_template_file( $template );

				if ( wp_mkdir_p( dirname( $theme_file ) ) && !file_exists( $theme_file ) ) {

					$template_file = $this->template_base . $template;

					// Copy template file

					copy( $template_file, $theme_file );

					echo '<div class="updated"><p>' . __( 'Template file copied to theme.', 'learnpress' ) . '</p></div>';

				}

			}

		}

	}



	protected function delete_template( $type ) {

		if ( $template = $this->get_template( 'template_' . $type ) ) {



			if ( !empty( $template ) ) {



				$theme_file = $this->get_theme_template_file( $template );



				if ( file_exists( $theme_file ) ) {

					unlink( $theme_file );

					echo '<div class="updated"><p>' . __( 'Template file deleted from theme.', 'learnpress' ) . '</p></div>';

				}

			}

		}

	}



	public function format_string( $string ) {

		return str_replace( apply_filters( 'learn_press_email_format_string_find', $this->find, $this ), apply_filters( 'learn_press_email_format_string_replace', $this->replace, $this ), $string );

	}



	public function get_recipient() {

		return apply_filters( 'learn_press_email_recipient_' . $this->id, $this->recipient, $this->object );

	}



	public function get_subject() {

		return apply_filters( 'learn_press_email_subject_' . $this->id, $this->format_string( $this->subject ), $this->object );

	}



	public function get_content() {

		if ( $this->get_email_format() == 'plain_text' ) {

			$email_content = preg_replace( $this->plain_search, $this->plain_replace, strip_tags( $this->get_content_plain() ) );

		} else {

			$email_content = $this->get_content_html();

		}



		return wordwrap( $email_content, 70 );

	}



	public function get_heading() {

		return apply_filters( 'learn_press_email_heading_' . $this->id, $this->format_string( $this->heading ), $this->object );

	}



	function get_footer_text() {

		return apply_filters( 'learn_press_email_footer_text_' . $this->id, LP()->settings->get( 'emails_general.footer_text' ) );

	}



	public function get_content_plain() {

	}



	public function get_content_html() {

	}



	public function get_headers() {

		return apply_filters( 'learn_press_email_headers', "Content-Type: " . $this->get_content_format() . "\r\n", $this->id, $this->object );

	}



	public function get_attachments() {

		return apply_filters( 'learn_press_email_attachments', array(), $this->id, $this->object );

	}



	function get_from_address() {

		return sanitize_email( LP()->settings->get( 'emails_general.from_email' ) );

	}



	function get_from_name() {

		return sanitize_email( LP()->settings->get( 'emails_general.from_name' ) );

	}



	public function get_blogname() {

		return wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );

	}



	function get_content_format() {

		switch ( $this->get_email_format() ) {

			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_text';

	}



	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() );



			try {

				LP()->_include( 'libraries/class-emogrifier.php' );

				// apply CSS styles inline for picky email clients

				$emogrifier = new Emogrifier( $content, $css );

				$content    = $emogrifier->emogrify();



			} catch ( Exception $e ) {



			}

		}



		return $content;

	}



	public function get_template( $type ) {

		$type = esc_attr( basename( $type ) );



		if ( 'template_html' == $type ) {

			return $this->template_html;

		} else if ( 'template_plain' == $type ) {

			return $this->template_plain;

		}



		return '';

	}



	protected function save_template( $code, $path ) {



		if ( current_user_can( 'edit_themes' ) && !empty( $code ) && !empty( $path ) ) {

			$saved = false;

			$file  = get_stylesheet_directory() . '/' . learn_press_template_path() . '/' . $path;

			$code  = stripslashes( $code );

			if ( is_writeable( $file ) ) {



				$f = fopen( $file, 'w+' );



				if ( $f !== false ) {

					fwrite( $f, $code );

					fclose( $f );

					$saved = true;

				}

			}



			if ( !$saved ) {

				$redirect = add_query_arg( 'learn_press_error', urlencode( __( 'Could not write to template file.', 'learnpress' ) ) );

				wp_redirect( $redirect );

				exit;

			}

		}

	}



	public function get_theme_template_file( $template ) {

		return get_stylesheet_directory() . '/' . apply_filters( 'learn_press_template_directory', 'learnpress', $template ) . '/' . $template;

	}



	function admin_options( $obj ) {



	}



	public function send( $to, $subject, $message, $headers, $attachments ) {



		add_filter( 'wp_mail_from', array( $this, 'get_from_address' ) );

		add_filter( 'wp_mail_from_name', array( $this, 'get_from_name' ) );

		add_filter( 'wp_mail_content_type', array( $this, 'get_content_format' ) );



		$message = apply_filters( 'learn_press_mail_content', $this->apply_style_inline( $message ) );

		$return  = wp_mail( $to, $subject, $message, $headers, $attachments );



		if ( LP()->settings->get( 'debug' ) == 'yes' ) {

			ob_start();

			echo get_class( $this ) . '::' . __FUNCTION__ . "\n";

			print_r( func_get_args() );

			$log = ob_get_clean();

			LP_Debug::instance()->add( $log );

		}

		remove_filter( 'wp_mail_from', array( $this, 'get_from_address' ) );

		remove_filter( 'wp_mail_from_name', array( $this, 'get_from_name' ) );

		remove_filter( 'wp_mail_content_type', array( $this, 'get_content_format' ) );



		return $return;

	}



	function _send( $from, $to, $subject, $message ) {



	}



	/**

	 * @param string $format

	 *

	 * @return array

	 */



	function get_template_data( $format = 'plain' ) {

		return array( 'plain_text' => $format == 'plain' );

	}

}