haanga/runtime.php

   1 <?php
   2
   3
   4 /**
   5  *  Haanga Runtime class
   6  *
   7  *  Load a template, if the template does not exists or it
   8  *  has changed, this class will compile it and update the cache
   9  */
  10 class Haanga
  11 {
  12     protected static $cache_dir;
  13     protected static $templates_dir;
  14
  15     private function __construct()
  16     {
  17         /* The class can't be instanced */
  18     }
  19
  20     public static function setCacheDir($dir)
  21     {
  22         if (!is_dir($dir)) {
  23             throw new Exception("{$dir} is not a valid directory");
  24         }
  25         if (!is_writable($dir)) {
  26             throw new Exception("{$dir} can't be written");
  27         }
  28         self::$cache_dir = $dir;
  29     }
  30
  31     public static function setTemplateDir($dir)
  32     {
  33         if (!is_dir($dir)) {
  34             throw new Exception("{$dir} is not a valid directory");
  35         }
  36         self::$templates_dir = $dir;
  37     }
  38
  39     // doInclude(string $file) {{{
  40     /**
  41      *  Load a PHP file using Haanga's root dir as
  42      *  base dir.
  43      *
  44      *  @param string $file File
  45      *
  46      *  @return void
  47      */
  48     public static function doInclude($file)
  49     {
  50         require_once dirname(__FILE__)."/".$file;
  51     }
  52     // }}}
  53
  54     public static function Load($file, $vars = array(), $return=FALSE, $blocks=array())
  55     {
  56         static $compiler;
  57         if (empty(self::$cache_dir) || empty(self::$templates_dir)) {
  58             throw new Exception("Cache dir or template dir is missing");
  59         }
  60
  61         $tpl = self::$templates_dir.'/'.$file;
  62         $fnc = sha1($tpl);
  63         $php = self::$cache_dir.'/'.$fnc.'.php';
  64
  65         if (!is_file($php) && !is_file($tpl)) {
  66             throw new Exception("View {$file} doesn't exists");
  67         }
  68
  69         if (!is_file($php) || filemtime($tpl) > filemtime($php)) {
  70             if (!$compiler) {
  71                 require_once dirname(__FILE__)."/haanga.php";
  72                 $compiler = new Haanga_Main_Runtime;
  73             }
  74             $compiler->reset();
  75             //$compiler->setDebug($php.".dump");
  76             $code = $compiler->compile_file($tpl, $tpl);
  77             file_put_contents($php, "<?php".$code);
  78         }
  79         $callback = "haanga_".$fnc;
  80         if (!is_callable($callback)) {
  81             require_once $php;
  82         }
  83
  84         return $callback($vars, $return, $blocks);
  85     }
  86 }
  87
  88 /*
  89  * Local variables:
  90  * tab-width: 4
  91  * c-basic-offset: 4
  92  * End:
  93  * vim600: sw=4 ts=4 fdm=marker
  94  * vim<600: sw=4 ts=4
  95  */