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gyro/core/lib/components/mailmessagebuilder/alternativemessages.builder.php

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<?php
require_once dirname(__FILE__) . '/attachments.builder.php';
require_once dirname(__FILE__) . '/singlemessage.builder.php';

/**
 * Build message body for a single and an alternative message  
 */
class AlternativeMessageBuilder extends AttachmentsBuilder {
        /**
         * Alternative message
         * 
         * @var string
         */
        protected $alt_message;
        
        /**
         * Constructors
         * 
         * @param string $msg Message body
         * @param string $mime Mime type
         * @param string $alt Alternative message 
         */
        public function __construct($msg, $mime, $alt) {
                parent::__construct(new SingleMessageBuilder($msg, $mime), array());
                $this->alt_message = $alt;
        }
        
        /**
         * Return mime type of mail as a whole
         * 
         * @return string
         */
        public function get_mail_mime() {
                return 'multipart/alternative; boundary=' . $this->get_boundary();
        }
        
        /**
         * Return mail body
         * 
         * @return string
         */
        public function get_body() {
                $blocks = array();
                $altbuilder = new SingleMessageBuilder($this->alt_message, MailMessage::MIME_TEXT_PLAIN);
                $blocks[] = $this->create_block(
                        $altbuilder->get_mail_mime(), false, $altbuilder->get_body(), $altbuilder->get_additional_headers()
                );
                $blocks[] = $this->create_block(
                        $this->message_builder->get_mail_mime(), false, $this->message_builder->get_body(), $this->message_builder->get_additional_headers()
                );
                return 
                        $this->start_seperator($this->boundary) .
                        implode("\n" . $this->start_seperator($this->boundary), $blocks) .
                        $this->end_seperator($this->boundary);
        }       
}

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