1: <?php
 2: /**
 3:  * @author Jefferson González
 4:  * @license MIT
 5:  * @link http://github.com/peg-org/peg-src Source code.
 6: */
 7: 
 8: namespace Peg\Lib\Plugins;
 9: 
10: /**
11:  * A basic plugin loader.
12:  */
13: class Loader
14: {
15: 
16:     /**
17:      * A list of loaded plugins.
18:      * @var \Peg\Lib\Plugins\Base[]
19:      */
20:     public $plugins;
21: 
22:     /**
23:      * Create the plugins loader object.
24:      */
25:     public function __construct()
26:     {
27:         $this->plugins = array();
28:     }
29: 
30:     /**
31:      * Scans a given path for valid plugin files and load them if possible.
32:      * This method should be called after everything else in the application
33:      * has been properly initialized.
34:      * @param string $path
35:      */
36:     public function Start($path)
37:     {
38:         if(!is_dir($path))
39:             return;
40: 
41:         $path = rtrim($path, "/\\") . "/";
42: 
43:         $elements = scandir($path);
44: 
45:         foreach($elements as $file_name)
46:         {
47:             if(is_file($path . $file_name))
48:             {
49:                 $file_parts = explode(".", $file_name, 2);
50: 
51:                 if(count($file_parts) < 2)
52:                     continue;
53: 
54:                 $class_name = $file_parts[0];
55:                 $class_name_ns = "Peg\Lib\\Plugins\\$class_name";
56:                 $file_extension = $file_parts[1];
57: 
58:                 if($file_extension == "php")
59:                 {
60:                     include($path . $file_name);
61: 
62:                     if(in_array($class_name_ns, get_declared_classes()))
63:                     {
64:                         $this->plugins[$class_name] = new $class_name_ns;
65: 
66:                         $this->plugins[$class_name]->name = $class_name;
67: 
68:                         $this->plugins[$class_name]->path = $path . $file_name;
69: 
70:                         $this->plugins[$class_name]->OnInit();
71:                     }
72:                 }
73:             }
74:         }
75:     }
76: 
77: }