1: <?php
  2: 
  3: namespace Charcoal\View\Twig;
  4: 
  5: // From `twig/twig`
  6: use Twig_LoaderInterface;
  7: use Twig_Source;
  8: 
  9: // Parent namespace dependencies
 10: use Charcoal\View\AbstractLoader;
 11: use Charcoal\View\LoaderInterface;
 12: 
 13: /**
 14:  * The Charcoal View Twig Loader implements both Twig_LoaderInterface and its own LoaderInterface.
 15:  */
 16: class TwigLoader extends AbstractLoader implements
 17:     LoaderInterface,
 18:     Twig_LoaderInterface
 19: {
 20: 
 21:     /**
 22:      * Convert an identifier to a file path.
 23:      *
 24:      * @param string $ident The identifier to convert.
 25:      * @return string
 26:      */
 27:     protected function filenameFromIdent($ident)
 28:     {
 29:         $filename = str_replace([ '\\' ], '.', $ident);
 30:         $filename .= '.twig';
 31: 
 32:         return $filename;
 33:     }
 34: 
 35:     /**
 36:      * Twig_LoaderInterface > getSource()
 37:      *
 38:      * Gets the source code of a template, given its name.
 39:      *
 40:      * @param  string $name The name of the template to load.
 41:      * @return string The template source code.
 42:      */
 43:     public function getSource($name)
 44:     {
 45:         return $this->load($name);
 46:     }
 47: 
 48:     /**
 49:      * Twig_LoaderInterface > getSourceContext()
 50:      *
 51:      * Gets the source code of a template, given its name.
 52:      * For Twig 2.x
 53:      *
 54:      * @param  string $name The name of the template to load.
 55:      * @return Twig_Source The template source object.
 56:      */
 57:     public function getSourceContext($name)
 58:     {
 59:         $source = $this->load($name);
 60:         return new Twig_Source($source, $name);
 61:     }
 62: 
 63:     /**
 64:      * Twig_LoaderInterface > exists()
 65:      *
 66:      * For Twig 2.x
 67:      *
 68:      * @param  string $name The name of the template to load.
 69:      * @return boolean
 70:      */
 71:     public function exists($name)
 72:     {
 73:         return !!$this->findTemplateFile($name);
 74:     }
 75: 
 76:     /**
 77:      * Twig_LoaderInterface > getCacheKey()
 78:      *
 79:      * Gets the cache key to use for the cache for a given template name.
 80:      *
 81:      * @param  string $name The name of the template to load.
 82:      * @return string The cache key
 83:      */
 84:     public function getCacheKey($name)
 85:     {
 86:         $key = $this->findTemplateFile($name);
 87:         return $key;
 88:     }
 89: 
 90:     /**
 91:      * Twig_LoaderInterface > isFresh()
 92:      *
 93:      * Returns true if the template is still fresh.
 94:      *
 95:      * @param string  $name The template name.
 96:      * @param integer $time The last modification time of the cached template.
 97:      * @return boolean
 98:      */
 99:     public function isFresh($name, $time)
100:     {
101:         $file = $this->findTemplateFile($name);
102:         $fresh = (filemtime($file) <= $time);
103:         return $fresh;
104:     }
105: }
106: