1 <?php
  2 
  3 /*
  4  * This file is part of the Patron package.
  5  *
  6  * (c) Olivier Laviale <olivier.laviale@gmail.com>
  7  *
  8  * For the full copyright and license information, please view the LICENSE
  9  * file that was distributed with this source code.
 10  */
 11 
 12 namespace Patron;
 13 
 14 class Hook
 15 {
 16     static protected $hooks = array();
 17 
 18     static public function config_constructor($configs)
 19     {
 20         $by_ns = array();
 21 
 22         foreach ($configs as $config)
 23         {
 24             foreach ($config as $namespace => $hooks)
 25             {
 26                 if (isset($hooks[0]))
 27                 {
 28                     //DIRTY-20100621: COMPAT
 29 
 30                     \ICanBoogie\log('COMPAT: double array no longer needed: \1', array($hooks));
 31 
 32                     $hooks = array_shift($hooks);
 33                 }
 34 
 35                 foreach ($hooks as $name => $definition)
 36                 {
 37                     $by_ns[$namespace . '/' . $name] = $definition;
 38                 }
 39             }
 40         }
 41 
 42         #
 43         # the (object) cast is a workaround for an APC bug: http://pecl.php.net/bugs/bug.php?id=8118
 44         #
 45 
 46         return (object) $by_ns;
 47     }
 48 
 49     static public function find($ns, $name)
 50     {
 51         global $core;
 52 
 53         if (!self::$hooks)
 54         {
 55             #
 56             # the (array) cast is a workaround for an APC bug: http://pecl.php.net/bugs/bug.php?id=8118
 57             #
 58 
 59             self::$hooks = (array) $core->configs->synthesize('hooks', __CLASS__ . '::config_constructor');
 60         }
 61 
 62         if (empty(self::$hooks[$ns . '/' . $name]))
 63         {
 64             throw new \Exception(\ICanBoogie\format('Undefined hook %name in namespace %ns', array('%name' => $name, '%ns' => $ns)));
 65         }
 66 
 67         $hook = self::$hooks[$ns . '/' . $name];
 68 
 69         #
 70         # `$hook` is an array when the hook has not been created yet, in which case we create the
 71         # hook on the fly.
 72         #
 73 
 74         if (is_array($hook))
 75         {
 76             $tags = $hook;
 77 
 78             list($callback, $params) = $tags + array(1 => array());
 79 
 80             unset($tags[0]);
 81             unset($tags[1]);
 82 
 83             if (is_string($callback) && $callback[1] == ':' && $callback[0] == 'o')
 84             {
 85                 $class = substr($callback, 2);
 86 
 87                 $hook = new $class();
 88                 $hook->params = $params;
 89                 $hook->tags = $tags;
 90             }
 91             else
 92             {
 93                 $hook = new Hook($callback, $params, $tags);
 94             }
 95 
 96             self::$hooks[$ns . '/' . $name] = $hook;
 97         }
 98 
 99         return $hook;
100     }
101 
102     public $callback;
103     public $params = array();
104     public $tags = array();
105 
106     public function __construct($callback, array $params=array(), array $tags=array())
107     {
108         $this->callback = $callback;
109         $this->params = $params;
110         $this->tags = $tags;
111     }
112 
113     public function __invoke()
114     {
115         $args = func_get_args();
116 
117         return call_user_func_array($this->callback, $args);
118     }
119 }

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