mise en place de la release 0.7

passage pour le trunk a la version PHP 5 (voir le fichier RELEASE.fr pourplus de renseignement sur la nouvelle version de developpement)

inc/class/cache.class.php

@@ -0,0 +1,153 @@
+<?php
+/**
+ * Class for manage the cache of SVG file
+ *
+ * @license http://www.gnu.org/licenses/gpl.html GPL
+ * @copyright 2009 Johann Dréo, Simon Leblanc
+ * @package stripit
+ */
+class Cache
+{
+  /**
+   * The filename which use for write the php array with the cache data
+   * @var string
+   * @access protected
+   * @static
+   */
+  protected static $filename  = null;
+  
+  /**
+   * This variable contain the cache for not reload always the cache with an include
+   * @var array
+   * @access protected
+   * @static
+   */
+  protected static $cache     = null;
+  
+  
+  /**
+   * This function initialize, if neccesary, the filename with the configuration
+   * 
+   * @access protected
+   * @static
+   */
+  protected static function init()
+  {
+    if (self::$filename === null) {
+      self::$filename = Config::getCacheFolder().'/'.Config::getCacheFilename();
+    }
+  }
+  
+  
+  /**
+   * This method obtain the cache if neccesary and return it
+   *
+   * @access public
+   * @static
+   * @return array The cache of the SVG file
+   * @throws Exception If the cache isn't defined an exception is throwed
+   */
+  public static function getCache()
+  {
+    self::init();
+    
+    if (file_exists(self::$filename) === false) {
+      return array();
+    }
+    
+    include self::$filename;
+    
+    if (isset($cache) === false) {
+      throw new Exception('The cache isn\'t defined!');
+    }
+    
+    self::$cache = $cache;
+    
+    return $cache;
+  }
+  
+  
+  /**
+   * This method allow to generate the cache file with all data for SVG file
+   *
+   * @access public
+   * @static
+   * @throws Exception If the cache can't be write, an exception is throwed
+   * @todo When PHP 5.3 is ok in most hosting, use GlobIterator and not DirectoryIterator and don't do 2 foreach and ksort
+   */
+  public static function setCache()
+  {
+    self::init();
+    
+    $directory = new DirectoryIterator(Config::getStripFolder());
+    $file = array();
+    
+    // get all svg file
+    foreach ($directory as $file) {
+      if ($file->isDot() === true || $file->isFile() === false) {
+        continue;
+      }
+      
+      $extension = pathinfo($file->getPathname(), PATHINFO_EXTENSION);
+      if (strtolower($extension) !== 'svg') {
+        continue;
+      }
+      
+     $files[$file->getBasename()] = $file->getMTime();
+    }
+    
+    // We must use ksort for sort the array by filename (the DirectoryIterator have his self sort :-)), in PHP 5.3, we can use GlobIterator directly
+    ksort($files);
+    
+    $cache = '<?php $cache = array(';
+    foreach ($files as $name => $time) {
+      $cache .= '"'.str_replace('"', '\"', $name).'" => '.$time.', ';
+    }
+    $cache .= ');';
+    
+    // if file wrinting fail, throw an Exception
+    if (file_put_contents(self::$filename, $cache) === false) {
+      throw new Exception('Impossible to write in the cache file : "'.self::$filename.'"');
+    }
+  }
+  
+  
+  /**
+   * Return the last numeric key of the cache array
+   *
+   * @access public
+   * @static
+   * @return integer the last numeric key of the cache array
+   */
+  public static function getLastId()
+  {
+    if (self::$cache === null) {
+      self::getCache();
+    }
+    
+    return (count(self::$cache) - 1);
+  }
+  
+  
+  /**
+   * Return the strip with the numeric key of the cache
+   *
+   * @access public
+   * @static
+   * @return Strip The strip wanted
+   */
+  public static function getStrip($id = 0)
+  {
+    $last_id = self::getLastId();
+    
+    // if the id of strip isn't valid, return a new strip
+    if ($last_id === -1 || $id > $last_id) {
+      return new Strip();
+    }
+    
+    $cache_iterator = new ArrayIterator(self::$cache);
+    $cache_iterator->seek($id);
+    
+    return Strip::getCache($cache_iterator->key());
+  }
+}