1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  *
  6:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  7:  *
  8:  * For the full copyright and license information, please view
  9:  * the file license.txt that was distributed with this source code.
 10:  */
 11: 
 12: namespace Nette\Application;
 13: 
 14: use Nette;
 15: 
 16: 
 17: 
 18: /**
 19:  * Default presenter loader.
 20:  *
 21:  * @author     David Grudl
 22:  */
 23: class PresenterLoader implements IPresenterLoader
 24: {
 25:     /** @var bool */
 26:     public $caseSensitive = FALSE;
 27: 
 28:     /** @var string */
 29:     private $baseDir;
 30: 
 31:     /** @var array */
 32:     private $cache = array();
 33: 
 34: 
 35: 
 36:     /**
 37:      * @param  string
 38:      */
 39:     public function __construct($baseDir)
 40:     {
 41:         $this->baseDir = $baseDir;
 42:     }
 43: 
 44: 
 45: 
 46:     /**
 47:      * @param  string  presenter name
 48:      * @return string  class name
 49:      * @throws InvalidPresenterException
 50:      */
 51:     public function getPresenterClass(& $name)
 52:     {
 53:         if (isset($this->cache[$name])) {
 54:             list($class, $name) = $this->cache[$name];
 55:             return $class;
 56:         }
 57: 
 58:         if (!is_string($name) || !preg_match("#^[a-zA-Z\x7f-\xff][a-zA-Z0-9\x7f-\xff:]*$#", $name)) {
 59:             throw new InvalidPresenterException("Presenter name must be alphanumeric string, '$name' is invalid.");
 60:         }
 61: 
 62:         $class = $this->formatPresenterClass($name);
 63: 
 64:         if (!class_exists($class)) {
 65:             // internal autoloading
 66:             $file = $this->formatPresenterFile($name);
 67:             if (is_file($file) && is_readable($file)) {
 68:                 Nette\Loaders\LimitedScope::load($file, TRUE);
 69:             }
 70: 
 71:             if (!class_exists($class)) {
 72:                 throw new InvalidPresenterException("Cannot load presenter '$name', class '$class' was not found in '$file'.");
 73:             }
 74:         }
 75: 
 76:         $reflection = new Nette\Reflection\ClassReflection($class);
 77:         $class = $reflection->getName();
 78: 
 79:         if (!$reflection->implementsInterface('Nette\Application\IPresenter')) {
 80:             throw new InvalidPresenterException("Cannot load presenter '$name', class '$class' is not Nette\\Application\\IPresenter implementor.");
 81:         }
 82: 
 83:         if ($reflection->isAbstract()) {
 84:             throw new InvalidPresenterException("Cannot load presenter '$name', class '$class' is abstract.");
 85:         }
 86: 
 87:         // canonicalize presenter name
 88:         $realName = $this->unformatPresenterClass($class);
 89:         if ($name !== $realName) {
 90:             if ($this->caseSensitive) {
 91:                 throw new InvalidPresenterException("Cannot load presenter '$name', case mismatch. Real name is '$realName'.");
 92:             } else {
 93:                 $this->cache[$name] = array($class, $realName);
 94:                 $name = $realName;
 95:             }
 96:         } else {
 97:             $this->cache[$name] = array($class, $realName);
 98:         }
 99: 
100:         return $class;
101:     }
102: 
103: 
104: 
105:     /**
106:      * Formats presenter class name from its name.
107:      * @param  string
108:      * @return string
109:      */
110:     public function formatPresenterClass($presenter)
111:     {
112:         return str_replace(':', 'Module\\', $presenter) . 'Presenter';
113:     }
114: 
115: 
116: 
117:     /**
118:      * Formats presenter name from class name.
119:      * @param  string
120:      * @return string
121:      */
122:     public function unformatPresenterClass($class)
123:     {
124:         return str_replace('Module\\', ':', substr($class, 0, -9));
125:     }
126: 
127: 
128: 
129:     /**
130:      * Formats presenter class file name.
131:      * @param  string
132:      * @return string
133:      */
134:     public function formatPresenterFile($presenter)
135:     {
136:         $path = '/' . str_replace(':', 'Module/', $presenter);
137:         return $this->baseDir . substr_replace($path, '/presenters', strrpos($path, '/'), 0) . 'Presenter.php';
138:     }
139: 
140: }
141: