language : Add a working cache management. No need to restart Apache after upgrade of .mo files if a cache directory is available

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@2934 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

language.php

@@ -19,6 +19,10 @@ class language
   // The only available codeset is UTF8
   // The languages are always in the format fr_FR (without the codeset)
 
+
+  /** Language cache directory */
+  public $cacheDir = "data/locale";
+
   /** Choose the best language in the browser list and which is available in 
       locale path
       @param string|null $repLocale Directory where are stored the translations
@@ -210,51 +214,39 @@ class language
     $category    = $this->languageCategoryText ($category);
     $temporaries = glob ("$repLocale/$languageCode.$codeset/$category/*-*.mo");
     $moFile      = "$repLocale/$languageCode.$codeset/$category/$package.mo";
-    $link        = "$repLocale/$languageCode.$codeset/$category/$package-".
-                    time().".mo";
+    $linkBase    = $this->cacheDir."/$languageCode.$codeset/$category/".
+                   "$package-";
+    $link        = $linkBase.filemtime($moFile).".mo";
     if (! file_exists ($moFile))
     {
       return "";
     }
+    // Manage the cache directory
+    if (! file_exists (dirname ($link)))
+    {
+      // Try to create the cache dir. If there is an error, return the official
+      // moFile. Apache will need to be restarted
+      @mkdir (dirname ($link), 0777, true);
+    }
+    if (is_dir (dirname ($link)) && is_writeable (dirname ($link)) &&
+        is_readable (dirname ($link)))
+    {
+      // Manage the cache file
+      if (! file_exists ($link) || ! is_readable ($link) ||
+          filemtime ($moFile) > filemtime ($link))
+      {
+        $files = glob ("$linkBase*");
+        array_map ("unlink", $files);
+        copy ($moFile, $link);
+        chmod ($link, 0666);
+      }
+      if (filemtime ($moFile) <= filemtime ($link))
+      {
+        return $link;
+      }
+    }
     clearstatcache (false, $moFile);
     return $moFile;
-/*    if (! is_writeable (dirname ($moFile)))
-    {
-      // Si le répertoire est protégé en écriture, on donne le fichier original.
-      // On devra relancer Apache pour prendre en compte une modification
-      return $moFile;
-    }
-    if (count ($temporaries) > 1)
-    {
-      // Too much links are available : delete all and recreate it
-      foreach ($temporaries as $temp)
-      {
-        unlink ($temp);
-      }
-      $temporaries = array ();
-    }
-    if (empty ($temporaries))
-    {
-      // Create the cache
-      copy ($moFile, $link);
-    }
-    else
-    {
-      // The cache exists. Is it up to date ?
-      $cache = $temporaries[0];
-      if (filemtime ($cache) < filemtime ($moFile))
-      {
-        // Obsolete cache : recreate it
-        unlink ($cache);
-        copy ($moFile, $link);
-      }
-      else
-      {
-        // Up to date cache
-        $link = $cache;
-      }
-    }
-    return $link;*/
   }
 
   function languageActivation ($moFile, $languageCode, $category = LC_MESSAGES,