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