1: <?php
 2: /**
 3:  * Abstract send email
 4:  *
 5:  * PHP 5
 6:  *
 7:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 8:  * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 9:  *
10:  * Licensed under The MIT License
11:  * For full copyright and license information, please see the LICENSE.txt
12:  * Redistributions of files must retain the above copyright notice.
13:  *
14:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
15:  * @link          http://cakephp.org CakePHP(tm) Project
16:  * @package       Cake.Network.Email
17:  * @since         CakePHP(tm) v 2.0.0
18:  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
19:  */
20: 
21: /**
22:  * Abstract transport for sending email
23:  *
24:  * @package       Cake.Network.Email
25:  */
26: abstract class AbstractTransport {
27: 
28: /**
29:  * Configurations
30:  *
31:  * @var array
32:  */
33:     protected $_config = array();
34: 
35: /**
36:  * Send mail
37:  *
38:  * @param CakeEmail $email
39:  * @return array
40:  */
41:     abstract public function send(CakeEmail $email);
42: 
43: /**
44:  * Set the config
45:  *
46:  * @param array $config
47:  * @return array Returns configs
48:  */
49:     public function config($config = null) {
50:         if (is_array($config)) {
51:             $this->_config = $config + $this->_config;
52:         }
53:         return $this->_config;
54:     }
55: 
56: /**
57:  * Help to convert headers in string
58:  *
59:  * @param array $headers Headers in format key => value
60:  * @param string $eol
61:  * @return string
62:  */
63:     protected function _headersToString($headers, $eol = "\r\n") {
64:         $out = '';
65:         foreach ($headers as $key => $value) {
66:             if ($value === false || $value === null || $value === '') {
67:                 continue;
68:             }
69:             $out .= $key . ': ' . $value . $eol;
70:         }
71:         if (!empty($out)) {
72:             $out = substr($out, 0, -1 * strlen($eol));
73:         }
74:         return $out;
75:     }
76: 
77: }
78: