New function isDirectory() introduced, fixed GET_DIR_AS_ARRAY() (replaces scandir())
[mailer.git] / inc / libs / cache_functions.php
index f1356910d97398e23b953594039edd0e149640ff..8ef45755e83065b164b2d75320bec6a415c0c957 100644 (file)
  * -------------------------------------------------------------------- *
  * Kurzbeschreibung  : Funktionen fuer die admins-Erweiterung           *
  * -------------------------------------------------------------------- *
- *                                                                      *
+ * $Revision:: 856                                                    $ *
+ * $Date::                                                            $ *
+ * $Tag:: 0.2.1-FINAL                                                 $ *
+ * $Author::                                                          $ *
+ * Needs to be in all Files and every File needs "svn propset           *
+ * svn:keywords Date Revision" (autoprobset!) at least!!!!!!            *
  * -------------------------------------------------------------------- *
  * Copyright (c) 2003 - 2008 by Roland Haeder                           *
  * For more information visit: http://www.mxchange.org                  *
@@ -38,32 +43,28 @@ if (!defined('__SECURITY')) {
 }
 
 // Caching class
-class mxchange_cache
-{
+class CacheSystem {
        // Define variables
-       var $update_interval = 0;
        var $ret = "init";
-       var $cache_path = "";
-       var $cache_inc = "";
-       var $cache_ctime = 0;
-       var $cache_pointer = false;
-       var $cache_data = "";
-       var $cache_version = "";
-       var $cache_file = "";
+       var $path = "";
+       var $inc = "";
+       var $fqfn = "";
+       var $pointer = false;
+       var $data = array();
+       var $version = array();
+       var $name = "";
+       var $rebuilt = array();
 
        // Constructor
-       function mxchange_cache($interval, $path, $tested) {
+       function CacheSystem ($interval, $path, $tested) {
                // Failed is the default
                $this->ret = "failed";
 
-               // Remember interval in class
-               $this->update_interval = $interval;
-
                // Remeber path
-               $this->cache_path = $path;
+               $this->path = $path;
 
                // Check if path exists
-               if ((is_dir($path)) && (!$tested)) {
+               if ((isDirectory($path)) && (!$tested)) {
                        // Check if we can create a file inside the path
                        touch($path."dummy.tmp", 'w');
                        if (FILE_READABLE($path."dummy.tmp")) {
@@ -89,75 +90,56 @@ class mxchange_cache
        }
 
        // Checks validity of cache file and if content is given
-       function cache_file ($file, $forceContent = false) {
+       function loadCacheFile ($cacheName, $forceContent = false) {
                // Remember cache file
-               $this->cache_file = $file;
-
-               // Construct FQFN (full qualified file name)
-               $inc = $this->cache_path.$file.".cache";
-
-               // Rember it + filename in class
-               $this->cache_inc = $inc;
+               $this->name = $cacheName;
 
-               // Check if file exists
-               $status = (FILE_READABLE($inc) && (is_writeable($inc)));
-               if ($status) {
-                       // Yes, it does. So let's get it's last changed date/time
-                       $ctime = filectime($inc);
-               } else {
-                       // No, it doesn't. Zero date/time
-                       $ctime = 0;
-               }
+               // Construct include filename for LOAD_INC_ONCE() call
+               $this->inc = $this->path . $cacheName . ".cache";
 
-               // Remember change date/time in class
-               $this->cache_ctime = $ctime;
+               // Construct FQFN (full qualified file name)
+               $this->fqfn = constant('PATH') . $this->inc;
 
-               // Is the cache file outdated?
-               if (($status) && ((time() - $ctime) >= $this->update_interval)) {
-                       // Ok, we need an update!
-                       $status = false;
-               } elseif ($status) {
-                       // Check on 'cache' extension
-                       $status = $this->ext_version_matches("cache");
-               }
+               // Check if file exists and if version matches
+               $status = ($this->isCacheReadable() && (is_writeable($this->fqfn)) && ($this->extensionVersionMatches("cache")));
 
                // Return status
                return $status;
        }
 
-       function cache_init($array) {
+       // Initializes the cache file
+       function init () {
                // This will destory an existing cache file!
                if ($this->ret == "done") {
                        // Create file
-                       if (FILE_READABLE($this->cache_inc)) chmod($this->cache_inc, 0666);
-                       $this->cache_pointer = fopen($this->cache_inc, 'w') or mxchange_die("Cannot write to cache ".$this->cache_inc." !");
+                       if ($this->isCacheReadable()) chmod($this->fqfn, 0666);
+                       $this->pointer = fopen($this->fqfn, 'w') or mxchange_die("Cannot write to cache ".$this->fqfn." !");
 
-                       // Begin of cache file
-                       fwrite($this->cache_pointer, "<?php\n\$ARRAY = \"".$array."\";\n\n");
+                       // Add open PHP tag
+                       fwrite($this->pointer, "<?php\n");
 
                        // Add default depency
-                       $this->store_extension_version("cache");
+                       $this->storeExtensionVersion("cache");
                } else {
                        // Cannot create file
-                       ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_PROBLEMS_DETECTED);
+                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
                }
        }
 
-       function add_row ($data) {
-               global $cacheArray;
-
-               if (is_resource($this->cache_pointer)) {
+       function addRow ($data) {
+               // Is the pointe rvalid?
+               if (is_resource($this->pointer)) {
                        // Write every array element to cache file
                        foreach ($data as $k => $v) {
                                // Write global cache array for immediate access
                                if ((substr($k, 0, 4) == "ext_") && (isset($data['ext_name'])) && (isset($data['ext_id']))) {
                                        if ($k != "ext_name") {
-                                               $cacheArray['extensions'][$k][$data['ext_name']] = $v;
+                                               $GLOBALS['cache_array']['extensions'][$k][$data['ext_name']] = $v;
                                        } else {
-                                               $cacheArray['extensions'][$k][$data['ext_id']] = $v;
+                                               $GLOBALS['cache_array']['extensions'][$k][$data['ext_id']] = $v;
                                        }
                                        if (($k == "ext_keep") && ($v == "Y")) {
-                                               $cacheArray['active_extensions'][$data['ext_name']] = $v;
+                                               $GLOBALS['cache_array']['active_extensions'][$data['ext_name']] = $v;
                                        } // END - if
                                } elseif (is_array($v)) {
                                        // Serialize and BASE64-encode the array
@@ -165,109 +147,107 @@ class mxchange_cache
                                }
 
                                // Write cache line to file
-                               fwrite($this->cache_pointer, $this->add_raw_row($k, $v));
+                               fwrite($this->pointer, $this->rewriteEntry($k, $v));
                        }
                } else {
                        // Cannot create file
-                       ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_PROBLEMS_DETECTED);
+                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
                }
        }
 
-       function cache_close() {
+       function finalize () {
                // Quit function when no pointer is set
-               if (empty($this->cache_pointer)) return;
-               if (is_resource($this->cache_pointer)) {
+               if (is_resource($this->pointer)) {
                        // Write footer
-                       fwrite($this->cache_pointer, "?>\n");
+                       fwrite($this->pointer, "?>\n");
 
                        // Close file add destroy handler
-                       fclose($this->cache_pointer);
+                       fclose($this->pointer);
 
                        // Set rights
-                       if (FILE_READABLE($this->cache_inc)) chmod($this->cache_inc, 0666);
+                       if ($this->isCacheReadable()) chmod($this->fqfn, 0666);
 
                        // Remove pointer
-                       unset($this->cache_pointer);
-               } else {
-                       // Cannot create file
-                       ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_PROBLEMS_DETECTED);
-               }
+                       $this->pointer = false;
+                       //* DEBUG: */ print __METHOD__."(<font color=\"#0000aa\">".__LINE__."</font>): {$this->name} - FINALIZED!<br />\n";
+               } // END - if
        }
 
-       function cache_load() {
+       function getArrayFromCache () {
                // Is the cache already loaded?
-               if (isset($this->cache_data[$this->cache_file])) {
+               if (isset($this->data[$this->name])) {
                        // Return it's content!
-                       return $this->cache_data[$this->cache_file];
+                       return $this->data[$this->name];
                } // END - if
 
                // Is the cache file there?
-               if (FILE_READABLE($this->cache_inc)) {
+               if ($this->isCacheReadable()) {
                        // Prepare temporary array
                        $data = array();
                        $cache_version = null;
 
                        // Load cache file
-                       require_once($this->cache_inc);
+                       require($this->inc);
 
                        // Is there an array?
                        if (is_array($data)) {
                                // Cache data
-                               $this->cache_data[$this->cache_file] = $data;
+                               $this->data[$this->name] = $data;
 
                                // Cache version found?
                                if ((is_array($cache_version)) && (count($cache_version) > 0)) {
                                        // Remember it as well...
-                                       $this->cache_version[$this->cache_file] = $cache_version;
+                                       $this->version[$this->name] = $cache_version;
                                } else {
                                        // Invalid cache so destroy it
-                                       $this->cache_destroy();
+                                       $this->destroyCacheFile();
 
                                        // Clear cached data
-                                       $this->cache_data[$this->cache_file] = array();
+                                       $this->data[$this->name] = array();
                                }
 
                                // Return cache
-                               return $this->cache_data[$this->cache_file];
+                               return $this->data[$this->name];
                        } else {
                                // Cache problem detected!
-                               $this->cache_destroy();
+                               $this->destroyCacheFile();
                        }
                } else {
                        // Cache file not found or not readable
-                       ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_CANNOT_LOAD_1.$this->cache_inc.CACHE_CANNOT_LOAD_2);
+                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_CANNOT_LOAD_1.$this->fqfn.CACHE_CANNOT_LOAD_2);
                }
        }
 
        // Destroy an existing cache file
-       function cache_destroy() {
+       function destroyCacheFile () {
                // Is the cache file there?
-               if (FILE_READABLE($this->cache_inc)) {
+               if ((!isset($this->rebuilt[$this->name])) && ($this->isCacheReadable())) {
                        // Close cache
-                       $this->cache_close();
+                       $this->finalize();
 
                        // Remove cache file from system
-                       unlink($this->cache_inc);
+                       //* DEBUG: */ print __METHOD__."(<font color=\"#0000aa\">".__LINE__."</font>): {$this->name} - DESTROYED!<br />\n";
+                       unlink($this->fqfn);
+                       // @TODO remove from $GLOBALS['cache_array']!!!
 
                        // Is the file there?
-                       if (!FILE_READABLE($this->cache_inc)) {
+                       if (!$this->isCacheReadable()) {
                                // The cache does no longer exist so kill the content
-                               unset($this->cache_data[$this->cache_file]);
+                               unset($this->data[$this->name]);
+                               unset($this->version[$this->name]);
+                               $this->rebuilt[$this->name] = true;
                        } else {
                                // Not removed!
-                               ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_CANNOT_UNLINK_1.$this->cache_inc.CACHE_CANNOT_UNLINK_2);
+                               addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_CANNOT_UNLINK_1.$this->fqfn.CACHE_CANNOT_UNLINK_2);
                        }
-               } else {
-                       // Does not exist!
-                       ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_PROBLEMS_DETECTED);
-               }
+               } // END - if
        }
 
-       function cache_remove($search, $data, $array) {
-               global $ARRAY;
-               if ((FILE_READABLE($this->cache_inc)) && (is_writeable($this->cache_inc))) {
+       // Unused method:
+       function removeEntry ($search, $data, $array) {
+               if (($this->isCacheReadable()) && (is_writeable($this->fqfn))) {
                        // Load cache into dummy array
-                       $dummy = $this->cache_load();
+                       $dummy = $this->getArrayFromCache();
 
                        // Search for key in array
                        $key = array_search($data, $dummy[$search]);
@@ -276,52 +256,52 @@ class mxchange_cache
                                foreach ($array as $a) {
                                        // So we can remove all elements as requested
                                        unset($dummy[$a][$key]);
-                               }
+                               } // END - foreach
 
                                // Flush array to cache file
-                               $this->cache_init($ARRAY);
+                               $this->init();
 
                                // Write array out
-                               $this->cache_write_array($dummy);
+                               $this->writeArray($dummy);
 
                                // Close cache file
-                               $this->cache_close();
+                               $this->finalize();
                        }
                } else {
                        // Cannot write to cache!
-                       ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_PROBLEMS_DETECTED);
+                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
                }
        }
 
-       function cache_write_array ($array) {
-               if (is_resource($this->cache_pointer)) {
+       function writeArray ($array) {
+               if (is_resource($this->pointer)) {
                        foreach ($array as $k => $v) {
                                if (is_array($v)) {
                                        // Multi line(s) found
                                        $LINE = "";
                                        foreach($v as $k2 => $v2) {
                                                // Put every array element in a row...
-                                               $LINE .= $this->add_raw_row($k, $v2);
+                                               $LINE .= $this->rewriteEntry($k, $v2);
                                        }
                                } else {
                                        // Single line found
-                                       $LINE = $this->add_raw_row($k, $v);
+                                       $LINE = $this->rewriteEntry($k, $v);
                                }
 
                                // Write line(s)
-                               fwrite($this->cache_pointer, $LINE);
+                               fwrite($this->pointer, $LINE);
                        } // END - foreach
                } else {
                        // Cannot write array!
-                       ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_PROBLEMS_DETECTED);
+                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
                }
        }
 
-       function cache_replace($search, $replace, $search_key, $array) {
-               global $ARRAY;
-               if ((FILE_READABLE($this->cache_inc)) && (is_writeable($this->cache_inc))) {
+       // Unused method
+       function replaceEntry ($search, $replace, $search_key, $array) {
+               if (($this->isCacheReadable()) && (is_writeable($this->fqfn))) {
                        // Load cache into dummy array
-                       $dummy = $this->cache_load();
+                       $dummy = $this->getArrayFromCache();
 
                        // Check if $dummy is valid (prevents some errors)
                        if ((is_array($dummy)) && (isset($dummy[$search])) && (is_array($dummy[$search]))) {
@@ -335,58 +315,86 @@ class mxchange_cache
                                                if ($a == $search) {
                                                        // Update now...
                                                        $dummy[$a][$search_key] = $replace;
-                                               }
-                                       }
+                                               } // END - if
+                                       } // END - foreach
 
                                        // Flush array to cache file
-                                       $this->cache_init($ARRAY);
+                                       $this->init();
 
                                        // Write array out
-                                       $this->cache_write_array($dummy);
+                                       $this->writeArray($dummy);
 
                                        // Close cache file
-                                       $this->cache_close();
-                               }
-                       }
+                                       $this->finalize();
+                               } // END - if
+                       } // END - if
                } else {
                        // Cannot write to cache!
-                       ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_PROBLEMS_DETECTED);
+                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
                }
        }
 
-       function store_extension_version ($ext_name) {
+       // Writes the version of given extension to the cache file
+       function storeExtensionVersion ($ext_name) {
                // Valid cache pointer?
-               if (is_resource($this->cache_pointer)) {
+               if (is_resource($this->pointer)) {
                        // Get extension version
                        $ext_ver = GET_EXT_VERSION($ext_name);
 
                        // Write cache line to file
-                       fwrite($this->cache_pointer, "\$cache_version['".$ext_name."'] = \"".$ext_ver."\";\n");
+                       fwrite($this->pointer, "\$cache_version['".$ext_name."'] = \"".$ext_ver."\";\n");
+
+                       // Add the extension version to object (DO NOT REMOVE IT! Endless loop...)
+                       $this->version[$this->name][$ext_name] = $ext_ver;
+                       //* DEBUG: */ print __METHOD__."(<font color=\"#0000aa\">".__LINE__."</font>): {$this->name} - {$ext_name}={$ext_ver}<br />\n";
                } else {
                        // Cannot create file
-                       ADD_FATAL(__FILE__."(<font color=\"#0000aa\">".__LINE__."</font>): ".CACHE_PROBLEMS_DETECTED);
+                       addFatalMessage(__METHOD__, __LINE__, "(<font color=\"#0000aa\">".__LINE__."</font>): ".getMessage('CACHE_PROBLEMS_DETECTED'));
                }
        }
 
-       function ext_version_matches ($ext_name) {
+       // Checks wether versions from cache and extension matches
+       function extensionVersionMatches ($ext_name) {
                // Load cache (dummy)
-               $this->cache_load();
+               $this->getArrayFromCache();
 
                // Get extension version
                $ext_ver = GET_EXT_VERSION($ext_name);
 
+               // Debug messages
+               if (isset($this->version[$this->name][$ext_name])) {
+                       //* DEBUG: */ print __METHOD__."(<font color=\"#0000aa\">".__LINE__."</font>): cache={$this->name},ext_name={$ext_name} - {$ext_ver}/{$this->version[$this->name][$ext_name]}<br />\n";
+               } else {
+                       // No cache version found!
+                       DEBUG_LOG(__METHOD__, __LINE__, "Cache {$this->name} has missing version entry for extension {$ext_name}!");
+               }
+
                // Compare both
-               return ((isset($this->cache_version[$this->cache_file][$ext_name])) && ($this->cache_version[$this->cache_file][$ext_name] == $ext_ver));
+               return ((isset($this->version[$this->name][$ext_name])) && ($this->version[$this->name][$ext_name] == $ext_ver));
        }
 
-       function add_raw_row ($key, $value) {
+       // Rewrit the entry so it can be stored in cache file
+       // @TODO Add support for more types which break in last else-block
+       function rewriteEntry ($key, $value) {
                // Init line
                $line = "";
 
                // String or non-string? ;-)
-               if ((is_string($value)) || (is_null($value))) {
+               if (is_string($value)) {
                        // String...
                        $line = "\$data['".$key."'][] = \"".$value."\";\n";
+               } elseif (is_null($value)) {
+                       // Null
+                       $line = "\$data['".$key."'][] = null;\n";
+               } elseif (is_bool($value)) {
+                       // Boolean value
+                       if ($value === true) {
+                               // True
+                               $line = "\$data['".$key."'][] = true;\n";
+                       } else {
+                               // False
+                               $line = "\$data['".$key."'][] = false;\n";
+                       }
                } else {
                        // Non-string
                        $line = "\$data['".$key."'][] = ".$value.";\n";
@@ -396,9 +404,54 @@ class mxchange_cache
                return $line;
        }
 
+       // Getter for cache status
        function getStatus () {
                return $this->ret;
        }
+
+       // Checks wether the current cache file is readable
+       function isCacheReadable () {
+               return INCLUDE_READABLE($this->inc);
+       }
+
+} // END - class
+
+// Destroy the cache on extension changes
+function FILTER_CACHE_DESTROY_ON_EXT_CHANGE ($data) {
+       // Remove cache
+       if ($GLOBALS['cache_instance']->loadCacheFile("config"))     $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("extensions")) $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("modreg"))     $GLOBALS['cache_instance']->destroyCacheFile();
+
+       // Return it
+       return $data;
 }
+
+// Destroy the cache on changing admin
+function FILTER_CACHE_DESTROY_ON_ADMIN_CHANGE () {
+       // Remove cache
+       if ($GLOBALS['cache_instance']->loadCacheFile("admins")) $GLOBALS['cache_instance']->destroyCacheFile();
+}
+
+// Destroy all cache files
+function FILTER_CACHE_DESTROY_ALL () {
+       // Remove cache files
+       if ($GLOBALS['cache_instance']->loadCacheFile("admins"))      $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("admins_acls")) $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("config"))      $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("extensions"))  $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("modreg"))      $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("refdepths"))   $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("refsystem"))   $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("themes"))      $GLOBALS['cache_instance']->destroyCacheFile();
+       if ($GLOBALS['cache_instance']->loadCacheFile("revision"))    $GLOBALS['cache_instance']->destroyCacheFile();
+}
+
+// Filter for purging entire admin menu cache
+function FILTER_CACHE_PURGE_ADMIN_MENU () {
+       // Just call the function
+       CACHE_PURGE_ADMIN_MENU();
+}
+
 //
 ?>