Extension notes and verbose SQL table rewritten to templates. Resolved #13
[mailer.git] / inc / extensions.php
index 17dbf7d6d4aaf5c3e1a97527f880e2786c57eba1..a59e17b086ff61ef806d85a365349eb99dd11427 100644 (file)
  ************************************************************************/
 
 // Some security stuff...
-if (ereg(basename(__FILE__), $_SERVER['PHP_SELF']))
-{
+if (!defined('__SECURITY')) {
        $INC = substr(dirname(__FILE__), 0, strpos(dirname(__FILE__), "/inc") + 4) . "/security.php";
        require($INC);
 }
-//
-function EXTENSION_REGISTER ($ext_name, $id, $dry_run=false)
-{
-       global $NOTES, $_CONFIG, $INC_POOL, $cacheInstance;
-       // We want to register an extension and registration status is by default "failed" (= false)
-       $EXT_LOAD_MODE = "register"; $ret = false; $SQLs = array();
+
+// Load the extension and maybe found language and function files.
+function LOAD_EXTENSION ($ext_name, $EXT_LOAD_MODE = "", $EXT_VER = "", $dry_run = false, &$SQLs = array()) {
+       global $EXT_LOADED, $_CONFIG, $CSS, $cacheMode, $EXT_VER_HISTORY;
+       global $INC_POOL, $EXT_UPDATE_DEPENDS, $EXT_DEPRECATED, $UPDATE_NOTES;
+       global $EXT_VERSION, $EXT_ALWAYS_ACTIVE;
+
+       // Init array
        $INC_POOL = array();
 
+       // Is the extension already loaded?
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "Loading extension {$ext_name}, mode={$EXT_LOAD_MODE}, ver={$EXT_VER}.");
+       if ((isset($EXT_LOADED['ext'][$ext_name])) && (empty($EXT_LOAD_MODE))) {
+               // Debug message
+               DEBUG_LOG(__FUNCTION__, __LINE__, sprintf("Extension %s already loaded.", $ext_name));
+               return false;
+       } // END - if
+
+       // Construct FQFN for extension file
+       $extInclude = sprintf("%sinc/extensions/ext-%s.php", PATH, $ext_name);
+
+       // Is the extension file NOT there?
+       if (!FILE_READABLE($extInclude)) {
+               // Debug message
+               DEBUG_LOG(__FUNCTION__, __LINE__, sprintf("Extension %s not found.", $ext_name));
+
+               // Abort here
+               return false;
+       } // END - if
+
+       // Construct FQFN for language file
+       $langInclude = sprintf("%sinc/language/%s_%s.php", PATH, $ext_name, GET_LANGUAGE());
+
+       // Is this include there?
+       if ((FILE_READABLE($langInclude)) && (!isset($EXT_LOADED['lang'][$ext_name]))) {
+               // Then load it
+               //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "--- Language loaded.");
+               $EXT_LOADED['lang'][$ext_name] = true;
+               require($langInclude);
+       } // END - if
+
+       // Construct FQFN for functions file
+       $funcsInclude = sprintf("%sinc/libs/%s_functions.php", PATH, $ext_name);
+
+       // Is this include there?
+       if ((FILE_READABLE($funcsInclude)) && (!isset($EXT_LOADED['funcs'][$ext_name]))) {
+               // Then load it
+               //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "--- Functions loaded.");
+               $EXT_LOADED['funcs'][$ext_name] = true;
+               require($funcsInclude);
+       } // END - if
+
+       // Extensions are not deprecated by default
+       $EXT_DEPRECATED = "N";
+
+       // Extensions are not always active by default
+       $EXT_ALWAYS_ACTIVE = "N";
+
+       // By default an extension update does not depend on other extensions
+       $EXT_UPDATE_DEPENDS = "";
+
+       // Extension update notes
+       $UPDATE_NOTES = "";
+
+       // Include the extension file
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "Extension loaded.");
+       require($extInclude);
+
+       // Is this extension deprecated?
+       if ($EXT_DEPRECATED == "Y") {
+               // Deactivate the extension
+               DEACTIVATE_EXTENSION($ext_name);
+
+               // Abort here
+               return false;
+       } // END - if
+
+       // Mark it as loaded in normal mode
+       if (empty($EXT_LOAD_MODE)) {
+               // Mark it now...
+               $EXT_LOADED['ext'][$ext_name] = true;
+       } // END - if
+
+       // All fine!
+       return true;
+}
+
+// Registeres an extension and possible update depencies
+function EXTENSION_REGISTER ($ext_name, $task_id, $dry_run = false, $logout = true) {
+       global $UPDATE_NOTES, $INC_POOL, $cacheInstance;
+       global $EXT_VER_HISTORY, $NOTES, $EXT_ALWAYS_ACTIVE, $EXT_VERSION;
+       global $EXT_UPDATE_DEPENDS;
+
        // This shall never do a non-admin user!
        if (!IS_ADMIN()) return false;
 
        // Is this extension already installed?
        if (EXT_IS_ACTIVE($ext_name)) return false;
 
-       // Generate file name
-       $file = sprintf("%sinc/extensions/ext-%s.php", PATH, $ext_name);
+       // Init variables
+       $ret = false; $SQLs = array();
+       $NOTES = "";
+       $INC_POOL = array();
+
+       // By default we have no failtures
+       $EXT_REPORTS_FAILURE = false;
 
        // Does this extension exists?
-       if (file_exists($file) && is_readable($file))
-       {
-               // Extension was found so we can load it in registration mode
-               require($file);
-
+       if (LOAD_EXTENSION($ext_name, "register", "", $dry_run, $SQLs)) {
                // And run possible updates
-               $EXT_LOAD_MODE = "update"; $EXT_UPDATE_DEPENDS = "";
-               foreach ($EXT_VER_HISTORY as $EXT_VER)
-               {
-                       require($file);
-                       if (((GET_EXT_VERSION("sql_patches") != '') && ($_CONFIG['verbose_sql'] == "Y")) || (!EXT_IS_ACTIVE("sql_patches")))
-                       {
-                               if (!empty($UPDATE_NOTES))
-                               {
-                                       // Update notes found
-                                       $NOTES .= "<STRONG>v".$EXT_VER.":</STRONG><br />".$UPDATE_NOTES."<br /><br />\n";
-                                       $UPDATE_NOTES = "";
-                               }
-                                elseif (($EXT_VER == "0.0") || ($EXT_VER == "0.0.0"))
-                               {
-                                       // Initial release
-                                       $NOTES .= "<STRONG>v".$EXT_VER.":</STRONG><br />".INITIAL_RELEASE."<br /><br />\n";
-                               }
-                                else
-                               {
-                                       $NOTES .= "<STRONG>v".$EXT_VER.":</STRONG><br /><I>".NO_UPDATE_NOTES."</I><br /><br />\n";
-                               }
-                       }
-               }
+               $history = $EXT_VER_HISTORY;
+               foreach ($history as $ver) {
+                       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "ext_name={$ext_name}, ext_ver={$ver}");
+                       // Load extension in update mode
+                       LOAD_EXTENSION($ext_name, "update", $ver, $dry_run, $SQLs);
+
+                       // Add update notes to our output
+                       $NOTES .= ADD_EXTENSION_NOTES($ver, $UPDATE_NOTES);
+               } // END - foreach
 
                // Does this extension depends on an outstanding update of another update?
-               if (!empty($EXT_UPDATE_DEPENDS))
-               {
+               if (!empty($EXT_UPDATE_DEPENDS)) {
                        // Backup SQL commands and clear current
-                       $SQLs2 = $SQLs;  $SQLs = array(); $test = false;
-
-                       // Backup language as well
-                       $LANG_BCK = $EXT_LANG_PREFIX; $EXT_ALWAYS_ACTIVE = "N";
-
-                       // Load required extension also in update mode
-                       $file = sprintf("%sinc/extensions/ext-%s.php", PATH, $EXT_UPDATE_DEPENDS);
+                       $SQLs2 = $SQLs;
+                       $SQLs  = array();
+                       $test  = false;
+                       $ext_update = $EXT_UPDATE_DEPENDS;
 
                        // Check for required file
-                       if (file_exists($file) && is_readable($file))
-                       {
-                               // File exists so let's load it
-                               $VER_BACKUP = $EXT_VERSION;
-                               require($file);
-                               $EXT_VERSION = $VER_BACKUP;
-
+                       if (LOAD_EXTENSION($ext_update, "register", "", $dry_run, $SQLs)) {
                                // If versions mismatch update extension first
-                               $ext_ver = GET_EXT_VERSION($EXT_UPDATE_DEPENDS);
-                               if (empty($ext_ver))
-                               {
+                               $ext_ver = GET_EXT_VERSION($ext_update);
+
+                               // Extension version set? If empty the extension is not registered
+                               if (empty($ext_ver)) {
                                        // Extension not registered so far so first load task's ID...
-                                       $result = SQL_QUERY_ESC("SELECT id FROM "._MYSQL_PREFIX."_task_system WHERE task_type='EXTENSION' AND subject LIKE '[%s:]%%' LIMIT 1",
-                                        array($EXT_UPDATE_DEPENDS), __FILE__, __LINE__);
-                                       if (SQL_NUMROWS($result) == 1)
-                                       {
-                                               // Task found so load task's ID and register extension...
-                                               list($task) = SQL_FETCHROW($result);
-                                               SQL_FREERESULT($result);
-                                               $test = EXTENSION_REGISTER($EXT_UPDATE_DEPENDS, $task, $dry_run);
-                                       }
-                               }
-                                elseif ($ext_ver != $EXT_VERSION)
-                               {
+                                       $task = DETERMINE_EXTENSION_TASK_ID($ext_update);
+
+                                       // Entry found?
+                                       if ($task > 0) {
+                                               // Try to register the extension
+                                               $test = EXTENSION_REGISTER($ext_update, $task, $dry_run, false);
+                                       } // END - if
+                               } elseif ($ext_ver != $EXT_VERSION) {
                                        // Ok, update this extension now
-                                       EXTENSION_UPDATE(basename($file), $EXT_UPDATE_DEPENDS, $ext_ver, $dry_run);
+                                       EXTENSION_UPDATE($ext_update, $ext_ver, $dry_run);
 
                                        // All okay!
                                        $test = true;
-                               }
-                                else
-                               {
+                               } else {
                                        // Nothing to register / update before...
                                        $test = true;
                                }
-                       }
-                        else
-                       {
+                       } else {
                                // Required file for update does not exists!
                                $test = true;
                                // But this is fine for the first time...
@@ -143,10 +197,7 @@ function EXTENSION_REGISTER ($ext_name, $id, $dry_run=false)
 
                        // Finally restore previous SQLs
                        $SQLs = $SQLs2; unset($SQLs2);
-                       $EXT_LANG_PREFIX = $LANG_BCK;
-               }
-                else
-               {
+               } else {
                        // Does not depend on an other extension
                        $test = true;
                }
@@ -154,54 +205,25 @@ function EXTENSION_REGISTER ($ext_name, $id, $dry_run=false)
                // Switch back to register mode
                $EXT_LOAD_MODE = "register";
 
+               // Remains true if extension registration reports no failtures
+               $test = ($test && !$EXT_REPORTS_FAILURE);
+
                // Does everthing before wents ok?
                if ($test) {
                        // "Dry-run-mode" activated?
                        if (!$dry_run) {
-                               // Run all SQLs
-                               foreach ($SQLs as $sql) {
-                                       // Trim spaces away which we don't need
-                                       $sql = trim($sql);
-
-                                       // Is there still an SQL query?
-                                       if (!empty($sql)) {
-                                               // Do we have an "ALTER TABLE" command?
-                                               if (substr(strtolower($sql), 0, 11) == "alter table") {
-                                                       // Analyse the alteration command
-                                                       SQL_ALTER_TABLE($sql, __FILE__, __LINE__);
-                                               } else {
-                                                       // Run regular SQL command
-                                                       $result = SQL_QUERY($sql, __FILE__, __LINE__, false);
-                                               }
-                                       } // END - if
-                               } // END - foreach
-
-                               // Remove cache file(s) if extension is active
-                               if ((EXT_IS_ACTIVE("cache")) || (GET_EXT_VERSION("cache") != "")) {
-                                       //* DEBUG: */ echo __LINE__.": DESTROY!<br />\n";
-                                       // Remove cache files
-                                       if ($cacheInstance->cache_file("extensions", true)) $cacheInstance->cache_destroy();
-                                       if ($cacheInstance->cache_file("mod_reg", true))    $cacheInstance->cache_destroy();
-                                       if ($cacheInstance->cache_file("config", true))     $cacheInstance->cache_destroy();
-                               } // END - if
-
-                               // Check for added include files
-                               if (count($INC_POOL > 0)) {
-                                       // Loads every include file
-                                       foreach ($INC_POOL as $inc) {
-                                               require_once($inc);
-                                       } // END - foreach
-                               }
+                               // Run installation pre-installation filters
+                               RUN_FILTER('pre_extension_installed', array('dry_run' => $dry_run, 'sqls' => $SQLs));
 
                                // Register extension
-                               $result = SQL_QUERY_ESC("INSERT INTO "._MYSQL_PREFIX."_extensions (ext_name, ext_lang_file, ext_active, ext_version) VALUES ('%s', '%s', '%s', '%s')",
-                                array($ext_name, $EXT_LANG_PREFIX, $EXT_ALWAYS_ACTIVE, $EXT_VERSION), __FILE__, __LINE__);
+                               SQL_QUERY_ESC("INSERT INTO "._MYSQL_PREFIX."_extensions (ext_name, ext_active, ext_version) VALUES ('%s','%s','%s')",
+                                       array($ext_name, $EXT_ALWAYS_ACTIVE, $EXT_VERSION), __FILE__, __LINE__);
 
-                               // Update task management
-                               ADMIN_SOLVE_TASK($id);
+                               // Remove cache file(s) if extension is active
+                               RUN_FILTER('post_extension_installed', array('ext_name' => $ext_name, 'task_id' => $task_id, 'inc_pool' => $INC_POOL));
 
                                // In normal mode return a true on success
-                               $ret = true; unset($SQLs);
+                               $ret = true;
                        } else {
                                // Rewrite SQL command to keep { and } inside
                                foreach ($SQLs as $key => $sql) {
@@ -219,376 +241,356 @@ function EXTENSION_REGISTER ($ext_name, $id, $dry_run=false)
                        // No, an error occurs while registering extension :-(
                        $ret = false;
                }
-       } elseif (($id > 0) && (!empty($ext_name))) {
+       } elseif (($task_id > 0) && (!empty($ext_name))) {
                // Remove task from system when id and extension's name is valid
-               $result = SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_task_system WHERE id=%s AND status='NEW' LIMIT 1",
-                array(bigintval($id)), __FILE__, __LINE__);
+               SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_task_system WHERE id=%s AND status='NEW' LIMIT 1",
+                       array(bigintval($task_id)), __FILE__, __LINE__);
        }
 
        // Is this the sql_patches?
-       //* DEBUG: */ echo __LINE__.":{$ext_name}/{$EXT_LOAD_MODE}<br />\n";
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ":{$ext_name}/{$EXT_LOAD_MODE}");
        if (($ext_name == "sql_patches") && (($EXT_LOAD_MODE == "register") || ($EXT_LOAD_MODE == "remove")) && (!$dry_run) && ($test)) {
-               // Then redirect to logout
-               //* DEBUG: */ echo __LINE__.": LOAD!<br />\n";
-               LOAD_URL("modules.php?module=admin&logout=1&".$EXT_LOAD_MODE."=sql_patches");
+               //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": LOAD!");
+               if ($logout) {
+                       // Then redirect to logout
+                       LOAD_URL("modules.php?module=admin&logout=1&".$EXT_LOAD_MODE."=sql_patches");
+               } else {
+                       // Add temporary filter
+                       REGISTER_FILTER('shutdown', 'REDIRECT_TO_LOGOUT_SQL_PATCHES', true, true);
+                       $GLOBALS['ext_load_mode'] = $EXT_LOAD_MODE;
+               }
        } // END - if
 
        // Return status code
        return $ret;
 }
-//
-function EXTENSION_RUN_SQLS($id, $EXT_LOAD_MODE) {
+
+// Run SQL queries for given extension id
+// @TODO Change from ext_id to ext_name (not just even the variable! ;-) )
+function EXTENSION_RUN_SQLS ($ext_id, $load_mode) {
        global $cacheInstance;
+
+       // This shall never do a non-admin user!
+       if (!IS_ADMIN()) return false;
+
+       // Init array
        $SQLs = array();
 
        // By default no SQL has been executed
        $sqlRan = false;
 
-       // This shall never do a non-admin user!
-       if (!IS_ADMIN()) return false;
-
        // Get extension's name
-       $ext_name = GET_EXT_NAME($id);
+       $ext_name = GET_EXT_NAME($ext_id);
        if (empty($ext_name)) return false;
 
        // Load extension in detected mode
-       //* DEBUG: */ echo __FUNCTION__.":ext_name[{$id}]={$ext_name}<br />\n";
-       $file = sprintf("%sinc/extensions/ext-%s.php", PATH, $ext_name);
-       if (file_exists($file) && is_readable($file)) require($file);
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ":ext_name[{$ext_id}]={$ext_name}");
+       LOAD_EXTENSION($ext_name, $load_mode, "", false, $SQLs);
 
-       //* DEBUG: */ echo __FUNCTION__.":SQLs::count=".count($SQLs)."<br />\n";
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ":SQLs::count=".count($SQLs)."");
        if ((is_array($SQLs) && (sizeof($SQLs) > 0))) {
                // Run SQL commands...
-               foreach ($SQLs as $sql) {
-                       // Trim spaces away which we don't need
-                       $sql = trim($sql);
-
-                       // Is there still an SQL query?
-                       if (!empty($sql)) {
-                               // Do we have an "ALTER TABLE" command?
-                               //* DEBUG: */ echo __FUNCTION__.":SQL={$SQL}<br />\n";
-                               if (substr(strtolower($sql), 0, 11) == "alter table") {
-                                       // Analyse the alteration command
-                                       SQL_ALTER_TABLE($sql, __FILE__, __LINE__);
-                               } else {
-                                       // Run regular SQL command
-                                       $result = SQL_QUERY($sql, __FILE__, __LINE__, false);
-                               }
-
-                               // An SQL has been executed
-                               $sqlRan = true;
-                       } // END - if
-               } // END - foreach
+               RUN_FILTER('run_sqls', array('dry_run' => false, 'sqls' => $SQLs));
 
                // Removal mode?
-               if ($EXT_LOAD_MODE == "remove") {
+               if ($load_mode == "remove") {
                        // Delete this extension (remember to remove it from your server *before* you click on welcome!
-                       $result = SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_extensions WHERE id=%s LIMIT 1",
-                        array($id), __FILE__, __LINE__);
+                       SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
+                               array($ext_name), __FILE__, __LINE__);
                } // END - if
+       } // END - if
 
-               //* DEBUG: */ echo __FUNCTION__.":mode={$EXT_LOAD_MODE}<br />\n";
-
-               // Remove cache file(s) if extension is active
-               if (((EXT_IS_ACTIVE("cache")) || (GET_EXT_VERSION("cache") != "")) && (((SQL_AFFECTEDROWS() == 1) && ($EXT_LOAD_MODE == "remove")) || ($sqlRan === true))) {
-                       //* DEBUG: */ echo __LINE__.": DESTROY!<br />\n";
-                       // Remove cache files
-                       if ($cacheInstance->cache_file("extensions", true)) $cacheInstance->cache_destroy();
-                       if ($cacheInstance->cache_file("mod_reg", true))    $cacheInstance->cache_destroy();
-                       if ($cacheInstance->cache_file("config", true))     $cacheInstance->cache_destroy();
-               } // END - if
+       // Remove cache file(s) if extension is active
+       if (((EXT_IS_ACTIVE("cache")) || (GET_EXT_VERSION("cache") != "")) && (((SQL_AFFECTEDROWS() == 1)) || ($sqlRan === true) || ($load_mode == "activate") || ($load_mode == "deactivate"))) {
+               // Run filters
+               RUN_FILTER('post_extension_run_sql', $ext_name);
+       } // END - if
 
-               // Is this the sql_patches?
-               //* DEBUG: */ echo __LINE__.": {$id}/{$ext_name}/{$EXT_LOAD_MODE}<br />\n";
-               if (($ext_name == "sql_patches") && (($EXT_LOAD_MODE == "register") || ($EXT_LOAD_MODE == "remove"))) {
-                       // Then redirect to logout
-                       //* DEBUG: */ echo __LINE__.": LOAD!<br />\n";
-                       LOAD_URL("modules.php?module=admin&logout=1&".$EXT_LOAD_MODE."=sql_patches");
-               } // END - if
+       // Is this the sql_patches?
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": {$ext_id}/{$ext_name}/{$load_mode}");
+       if (($ext_name == "sql_patches") && (($load_mode == "register") || ($load_mode == "remove"))) {
+               // Then redirect to logout
+               //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": LOAD!");
+               LOAD_URL("modules.php?module=admin&logout=1&".$load_mode."=sql_patches");
        } // END - if
 }
+
 // Check if given extension is active
-function EXT_IS_ACTIVE ($ext_name, $ignore_admin = false, $ignore_cache = false) {
-       global $cacheArray, $_CONFIG;
+function EXT_IS_ACTIVE ($ext_name) {
+       global $cacheArray;
 
        // Extensions are all inactive during installation
        if ((!isBooleanConstantAndTrue('mxchange_installed')) || (isBooleanConstantAndTrue('mxchange_installing')) || (empty($ext_name))) return false;
 
-       // Extension's file name will also be checked
-       $file = sprintf("%sinc/extensions/ext-%s.php", PATH, $ext_name);
-       if ((!file_exists($file)) && (!is_readable($file))) return false;
-       //* DEBUG: */ echo "*".$ext_name."(".count($cacheArray).")<br />";
-
        // Not active is the default
        $active = "N";
 
        // Check cache
-       if ((!empty($cacheArray['extensions']['ext_active'][$ext_name])) && (!$ignore_cache)) {
+       if (isset($cacheArray['extensions']['ext_active'][$ext_name])) {
                // Load from cache
-               //* DEBUG: */ echo "CACHE!<br />\n";
+               //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "CACHE! ext_name={$ext_name}");
                $active = $cacheArray['extensions']['ext_active'][$ext_name];
 
                // Count cache hits
-               if (isset($_CONFIG['cache_hits'])) $_CONFIG['cache_hits']++;
+               incrementConfigEntry('cache_hits');
        } elseif (($ext_name == "cache") || (GET_EXT_VERSION("cache") == "")) {
-               //* DEBUG: */ echo "DB!<br />\n";
+               //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "DB! ext_name={$ext_name}");
                // Load from database
                $result = SQL_QUERY_ESC("SELECT ext_active FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
-                array($ext_name), __FILE__, __LINE__);
-               if (SQL_NUMROWS($result) == 0) {
-                       // Extension was not found!
-                       return false;
-               }
-               list($active) = SQL_FETCHROW($result);
-               //* DEBUG: */ echo $ext_name."[DB]: {$active}<br />\n";
+                       array($ext_name), __FILE__, __LINE__);
+
+               // Entry found?
+               if (SQL_NUMROWS($result) == 1) {
+                       // Load entry
+                       list($active) = SQL_FETCHROW($result);
+               } // END - if
+
+               // Free result
                SQL_FREERESULT($result);
 
                // Write cache array
+               //* DEBUG: */ echo $ext_name."[DB]: {$active}");
                $cacheArray['extensions']['ext_active'][$ext_name] = $active;
        } else {
                // Extension not active!
-               //* DEBUG: */ echo $ext_name.": Not active!<br />\n";
+               //* DEBUG: */ echo $ext_name.": Not active!");
                $cacheArray['extensions']['ext_active'][$ext_name] = "N";
        }
 
-       // Create FQFN for extension file
-       $inc = sprintf("%sinc/extensions/ext-%s.php", PATH, $ext_name);
-
        // Debug message
-       //DEBUG_LOG(__FUNCTION__.": ext_name={$ext_name},active={$active}");
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, " ext_name={$ext_name},active={$active}");
 
        // Is this extension activated? (For admins we always have active extensions...)
-       return (
-               (
-                       $active == "Y"
-               ) && (
-                       file_exists($inc)
-               ) && (
-                       is_readable($inc)
-               )
-       );
+       return ($active == "Y");
 }
 // Get version from extensions
 function GET_EXT_VERSION ($ext_name) {
-       global $cacheArray, $_CONFIG, $cacheInstance;
-       $ret = false;
+       global $cacheArray, $cacheInstance;
+       $ext_ver = false;
 
        // Extensions are all inactive during installation
        if ((!isBooleanConstantAndTrue('mxchange_installed')) || (isBooleanConstantAndTrue('mxchange_installing'))) return "";
-       //* DEBUG: */ echo __FUNCTION__.": ext_name={$ext_name}<br />\n";
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": ext_name={$ext_name}");
 
        // Is the cache written?
-       if (!empty($cacheArray['extensions']['ext_version'][$ext_name])) {
+       if (isset($cacheArray['extensions']['ext_version'][$ext_name])) {
                // Load data from cache
-               //* DEBUG: */ echo __FUNCTION__.": CACHE!<br />\n";
-               $ret = $cacheArray['extensions']['ext_version'][$ext_name];
+               //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": CACHE!");
+               $ext_ver = $cacheArray['extensions']['ext_version'][$ext_name];
 
                // Count cache hits
-               if (isset($_CONFIG['cache_hits'])) $_CONFIG['cache_hits']++; else $_CONFIG['cache_hits'] = 1;
+               incrementConfigEntry('cache_hits');
        } elseif (!is_object($cacheInstance)) {
                // Load from database
                $result = SQL_QUERY_ESC("SELECT ext_version FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
-                array($ext_name), __FILE__, __LINE__);
-               list($ret) = SQL_FETCHROW($result);
+                       array($ext_name), __FILE__, __LINE__);
+
+               // Is the extension there?
+               if (SQL_NUMROWS($result) == 1) {
+                       // Load entry
+                       list($ext_ver) = SQL_FETCHROW($result);
+               } // END - if
+
+               // Free result
                SQL_FREERESULT($result);
 
                // Set cache
-               $cacheArray['extensions']['ext_version'][$ext_name] = $ret;
+               $cacheArray['extensions']['ext_version'][$ext_name] = $ext_ver;
        }
 
        // Return result
-       //* DEBUG: */ echo __FUNCTION__.": ret={$ret}<br />\n";
-       return $ret;
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": ret={$ext_ver}");
+       return $ext_ver;
 }
-//
-function EXTENSION_UPDATE($file, $ext, $EXT_VER, $dry_run=false)
-{
+
+// Updates a given extension with current extension version to latest version
+function EXTENSION_UPDATE ($ext_name, $ext_ver, $dry_run = false) {
        // This shall never do a non-admin user!
-       global $cacheInstance, $_CONFIG, $NOTES; $SQLs = array();
-       if ((!IS_ADMIN()) || (empty($ext))) return false;
-
-       // Load extension in update mode
-       $EXT_LOAD_MODE = "update"; $EXT_UPDATE_DEPENDS = ""; $NOTES = "";
-       include(PATH."inc/extensions/".$file);
-       if (!empty($EXT_UPDATE_DEPENDS))
-       {
-               // Update another extension first!
-               $test = EXTENSION_UPDATE(("ext-".$EXT_UPDATE_DEPENDS.".php"), $EXT_UPDATE_DEPENDS, GET_EXT_VERSION($EXT_UPDATE_DEPENDS), $dry_run);
-       }
+       global $cacheInstance, $UPDATE_NOTES, $NOTES, $EXT_VER_HISTORY;
+       global $EXT_UPDATE_DEPENDS, $EXT_VERSION, $INC_POOL, $cacheArray, $SQLs;
+
+       // Init arrays
+       $SQLs = array(); $INC_POOL = array();
+
+       // Init notes
+       $NOTES = "";
+
+       // Only admins are allowed to update extensions
+       if ((!IS_ADMIN()) || (empty($ext_name))) return false;
+
+       // Load extension in test mode
+       LOAD_EXTENSION($ext_name, "test", $ext_ver, $dry_run, $SQLs);
+
+       // Save version history
+       $history = $EXT_VER_HISTORY;
+
+       // Remove old SQLs array to prevent possible bugs
+       $SQLs = array();
 
        // Check if version is updated
-       if ((($EXT_VERSION != $EXT_VER) || ($dry_run)) && (is_array($EXT_VER_HISTORY)))
-       {
+       if ((($EXT_VERSION != $ext_ver) || ($dry_run)) && (is_array($history))) {
                // Search for starting point
-               $start = array_search($EXT_VER, $EXT_VER_HISTORY);
-               $NOTES = "";
+               $start = array_search($ext_ver, $history);
 
                // And load SQL queries in order of version history
-               for ($idx = ($start + 1); $idx < sizeof($EXT_VER_HISTORY); $idx++)
-               {
-                       // Remove old SQLs array to prevent possible bugs
-                       if (!$dry_run) { unset($SQLs); $SQLs = array(); }
+               for ($idx = ($start + 1); $idx < sizeof($history); $idx++) {
+                       // Set extension version
+                       $cacheArray['update_ver'][$ext_name] = $history[$idx];
 
-                       // Set version
-                       $EXT_VER = $EXT_VER_HISTORY[$idx];
+                       // Load again...
+                       LOAD_EXTENSION($ext_name, "update", $cacheArray['update_ver'][$ext_name], $dry_run, $SQLs);
 
-                       // Include again...
-                       include(PATH."inc/extensions/".$file);
+                       if (!empty($EXT_UPDATE_DEPENDS)) {
+                               // Backup current SQL queries
+                               $cacheArray['update_sqls'][$ext_name] = $SQLs;
 
-                       // Add notes
-                       if ($_CONFIG['verbose_sql'] == "Y")
-                       {
-                               $EXT_VER = $EXT_VER_HISTORY[$idx];
-                               if (!empty($UPDATE_NOTES))
-                               {
-                                       // Update notes found
-                                       $NOTES .= "<STRONG>v".$EXT_VER.":</STRONG><br />".$UPDATE_NOTES."<br /><br />\n";
-                                       $UPDATE_NOTES = "";
-                               }
-                                elseif ($EXT_VER == "0.0")
-                               {
-                                       // Initial release
-                                       $NOTES .= "<STRONG>v".$EXT_VER.":</STRONG><br />".INITIAL_RELEASE."<br /><br />\n";
-                               }
-                                else
-                               {
-                                       $NOTES .= "<STRONG>v".$EXT_VER.":</STRONG><br /><I>".NO_UPDATE_NOTES."</I><br /><br />\n";
+                               // Is the extension there?
+                               if (GET_EXT_VERSION($EXT_UPDATE_DEPENDS) != "") {
+                                       // Update another extension first!
+                                       $test = EXTENSION_UPDATE($EXT_UPDATE_DEPENDS, GET_EXT_VERSION($EXT_UPDATE_DEPENDS), $dry_run);
+                               } else {
+                                       // Register new extension
+                                       $test = EXTENSION_REGISTER($EXT_UPDATE_DEPENDS, 0, $dry_run, false);
                                }
-                       }
 
-                       // Run SQLs
-                       if ((is_array($SQLs)) && (!$dry_run))
-                       {
-                               // Run SQL commands
-                               foreach ($SQLs as $sql)
-                               {
-                                       $sql = trim($sql);
-                                       if (!empty($sql))
-                                       {
-                                               // Do we have an "ALTER TABLE" command?
-                                               if (substr(strtolower($sql), 0, 11) == "alter table") {
-                                                       // Analyse the alteration command
-                                                       SQL_ALTER_TABLE($sql, __FILE__, __LINE__);
-                                               } else {
-                                                       // Run regular SQL command
-                                                       $result = SQL_QUERY($sql, __FILE__, __LINE__, false);
-                                               }
-                                       }
-                               }
-                       } elseif (GET_EXT_VERSION("sql_patches") == "") {
-                               // Remove SQLs if extension is not installed
-                               $SQLs = array();
-                       }
-               }
+                               // Restore previous SQL queries
+                               $SQLs = $cacheArray['update_sqls'][$ext_name];
+                               unset($cacheArray['update_sqls'][$ext_name]);
+                       } // END - if
 
-               if (!$dry_run)
-               {
-                       // In normal mode insert task and update extension's version...
-                       $ext_subj = "[UPDATE-".$ext."-".$EXT_VERSION.":] ".ADMIN_UPDATE_EXT_SUBJ;
+                       // Add notes
+                       $NOTES .= ADD_EXTENSION_NOTES($cacheArray['update_ver'][$ext_name], $UPDATE_NOTES);
+               } // END - for
+
+               // In real-mode execute any existing includes
+               if (!$dry_run) {
+                       $cacheArray['inc_pool'][$ext_name] = $INC_POOL;
+                       RUN_FILTER('load_includes', $INC_POOL);
+                       $INC_POOL = $cacheArray['inc_pool'][$ext_name];
+                       unset($cacheArray['inc_pool'][$ext_name]);
+               } // END - if
 
+               // Run SQLs
+               RUN_FILTER('run_sqls', array('dry_run' => $dry_run, 'sqls' => $SQLs));
+
+               if (!$dry_run) {
                        // Create task
-                       CREATE_EXTENSION_UPDATE_TASK(GET_ADMIN_ID(get_session('admin_login')), $ext_subj, addslashes($NOTES));
+                       CREATE_EXTENSION_UPDATE_TASK(GET_CURRENT_ADMIN_ID(), $ext_name, $cacheArray['update_ver'][$ext_name], addslashes($NOTES));
 
                        // Update extension's version
-                       $result = SQL_QUERY_ESC("UPDATE "._MYSQL_PREFIX."_extensions SET ext_version='%s' WHERE ext_name='%s' LIMIT 1",
-                        array($EXT_VERSION, $ext), __FILE__, __LINE__);
-
-                       // Update cache
-                       if (EXT_IS_ACTIVE("cache")) {
-                               if ($cacheInstance->cache_file("extensions", true) == true) $cacheInstance->cache_destroy();
-                               if ($cacheInstance->cache_file("config", true) == true)     $cacheInstance->cache_destroy();
-                               if ($cacheInstance->cache_file("mod_reg", true) == true)    $cacheInstance->cache_destroy();
-                       } // END - if
+                       SQL_QUERY_ESC("UPDATE "._MYSQL_PREFIX."_extensions SET ext_version='%s' WHERE ext_name='%s' LIMIT 1",
+                               array($cacheArray['update_ver'][$ext_name], $ext_name), __FILE__, __LINE__);
 
-                       // Remove array
+                       // Remove arrays
                        unset($SQLs);
+                       unset($cacheArray['update_ver'][$ext_name]);
+
+                       // Run filters on success extension update
+                       RUN_FILTER('extension_update', $ext_name);
                } else {
                        // In "dry-run" mode return array with SQL commands
                        return $SQLs;
                }
-       }
+       } // END - if
 }
-//
-function EXTENSION_VERBOSE_TABLE($SQLs, $title = ADMIN_SQLS_EXECUTED_ON_REMOVAL, $dashed = "", $switch = false, $WIDTH = "480") {
-       global $_CONFIG;
 
-       $S = false; $SW = 2; $i = 1;
+// Output verbose SQL table for extension
+function EXTENSION_VERBOSE_TABLE ($queries = array(), $title = ADMIN_SQLS_EXECUTED_ON_REMOVAL, $dashed = "", $switch = false, $width = "100%") {
+       global $SQLs;
+
+       // Are there some queries in $queries?
+       if (count($queries) > 0) {
+               // Then use them instead!
+               $SQLs = $queries;
+       } // END - if
+
+       // Init variables
+       $SW = 2; $i = 1;
        $OUT = "";
-       if ((is_array($SQLs)) && (GET_EXT_VERSION("sql_patches")) && ($_CONFIG['verbose_sql'] == "Y")) {
-               $OUT  = "<DIV align=\"center\">
-<TABLE border=\"0\" cellspacing=\"0\" cellpadding=\"0\" width=\"".$WIDTH."\" align=\"center\"".$dashed.">
-<TR>
-  <TD colspan=\"2\" align=\"center\" class=\"admin_title bottom2\" height=\"24\">
-    <STRONG>".$title.":</STRONG>
-  </TD>
-</TR>\n";
+
+       // Do we have queries?
+       if ((is_array($SQLs)) && (GET_EXT_VERSION("sql_patches") >= "0.0.7") && (getConfig('verbose_sql') == "Y")) {
                foreach ($SQLs as $idx => $sql) {
+                       // Trim out spaces
                        $sql = trim($sql);
+
+                       // Output command if set
                        if (!empty($sql)) {
-                               $S = true;
-                               $OUT .= "<TR>
-  <TD class=\"switch_sw".(3 - $SW)." bottom2\" style=\"padding-left: 2px\" width=\"30\">".$i.".</TD>
-  <TD class=\"switch_sw".(3 - $SW)." bottom2\" style=\"padding-left: 5px; padding-right: 5px\">
-    ".$sql."
-  </TD>
-</TR>\n";
-                               if ($switch) $SW = 3 - $SW;
+                               // Prepare output for template
+                               $content = array(
+                                       'sw'  => $SW,
+                                       'i'   => $i,
+                                       'sql' => $sql
+                               );
+
+                               // Load row template
+                               $OUT .= LOAD_TEMPLATE("admin_ext_sql_row", true, $content);
+
+                               // Switch color and count up
+                               $SW = 3 - $SW;
                                $i++;
-                       }
-               }
-       }
+                       } // END - if
+               } // END - foreach
 
-       if ((!$S) && (GET_EXT_VERSION("sql_patches")) && ($_CONFIG['verbose_sql'] == "Y")) {
+               // Prepare content for template
+               $content = array(
+                       'width'  => $width,
+                       'dashed' => $dashed,
+                       'title'  => $title,
+                       'out'    => $OUT
+               );
+
+               // Load main template
+               $OUT = LOAD_TEMPLATE("admin_ext_sql_table", true, $content);
+       } elseif ((GET_EXT_VERSION("sql_patches") >= "0.0.7") && (getConfig('verbose_sql') == "Y")) {
                // No addional SQL commands to run
-               $OUT .= "<TR>
-  <TD colspan=\"2\" align=\"center\" class=\"switch_sw2 bottom2\" height=\"24\">
-    <FONT class=\"admin_note\">".ADMIN_NO_ADDIONAL_SQLS."</FONT>
-  </TD>
-</TR>\n";
-       }
-
-       if (!empty($OUT)) {
-               // Add missing close-table tag
-               $OUT .= "</TABLE>
-</DIV>\n";
-       }
+               $OUT = LOAD_TEMPLATE("admin_settings_saved", true, ADMIN_NO_ADDITIONAL_SQLS);
+       } // END - if
 
        // Return output
        return $OUT;
 }
+
 // Get extension name from id
-function GET_EXT_NAME ($id) {
+function GET_EXT_NAME ($ext_id) {
+       global $cacheArray;
+
+       // Init extension name
        $ret = "";
-       global $cacheArray, $_CONFIG;
-       if (!empty($cacheArray['extensions']['ext_name'][$id])) {
+
+       // Is cache there?
+       if (isset($cacheArray['extensions']['ext_name'][$ext_id])) {
                // Load from cache
-               $ret = $cacheArray['extensions']['ext_name'][$id];
+               $ret = $cacheArray['extensions']['ext_name'][$ext_id];
 
                // Count cache hits
-               $_CONFIG['cache_hits']++;
+               incrementConfigEntry('cache_hits');
        } elseif (!EXT_IS_ACTIVE("cache")) {
                // Load from database
                $result = SQL_QUERY_ESC("SELECT ext_name FROM "._MYSQL_PREFIX."_extensions WHERE id=%s LIMIT 1",
-                array(bigintval($id)), __FILE__, __LINE__);
+                       array(bigintval($ext_id)), __FILE__, __LINE__);
                list($ret) = SQL_FETCHROW($result);
                SQL_FREERESULT($result);
        }
        return $ret;
 }
+
 // Get extension id from name
-function GET_EXT_ID($name) {
+function GET_EXT_ID ($ext_name) {
+       global $cacheArray;
+
+       // Init ID number
        $ret = 0;
-       global $cacheArray, $_CONFIG;
-       if (isset($cacheArray['extensions']['ext_id'][$name])) {
+       if (isset($cacheArray['extensions']['ext_id'][$ext_name])) {
                // Load from cache
-               $ret = $cacheArray['extensions']['ext_id'][$name];
+               $ret = $cacheArray['extensions']['ext_id'][$ext_name];
 
                // Count cache hits
-               $_CONFIG['cache_hits']++;
+               incrementConfigEntry('cache_hits');
        } elseif (!EXT_IS_ACTIVE("cache")) {
                // Load from database
                $result = SQL_QUERY_ESC("SELECT id FROM "._MYSQL_PREFIX."_extensions WHERE ext_name='%s' LIMIT 1",
-                array($name), __FILE__, __LINE__);
+                       array($ext_name), __FILE__, __LINE__);
                list($ret) = SQL_FETCHROW($result);
                SQL_FREERESULT($result);
        }
@@ -596,5 +598,249 @@ function GET_EXT_ID($name) {
        // Return value
        return $ret;
 }
+
+// Activate given extension
+function ACTIVATE_EXTENSION ($ext_name) {
+       // Activate the extension
+       SQL_QUERY_ESC("UPDATE "._MYSQL_PREFIX."_extensions SET ext_active='Y' WHERE ext_name='%s' LIMIT 1",
+               array($ext_name), __FILE__, __LINE__);
+
+       // Extension has been activated?
+       if (SQL_AFFECTEDROWS() == 1) {
+               // Then run all queries
+               EXTENSION_RUN_SQLS(GET_EXT_ID($ext_name), "activate");
+       } // END - if
+}
+
+// Deactivate given extension
+function DEACTIVATE_EXTENSION($ext_name) {
+       // Activate the extension
+       SQL_QUERY_ESC("UPDATE "._MYSQL_PREFIX."_extensions SET ext_active='N' WHERE ext_name='%s' LIMIT 1",
+               array($ext_name), __FILE__, __LINE__);
+
+       // Extension has been activated?
+       if (SQL_AFFECTEDROWS() == 1) {
+               // Then run all queries
+               EXTENSION_RUN_SQLS(GET_EXT_ID($ext_name), "deactivate");
+
+               // Create new task
+               CREATE_EXTENSION_DEACTIVATION_TASK($ext_name);
+
+               // Notify the admin
+               SEND_ADMIN_NOTIFICATION(ADMIN_SUBJECT_EXTENSION_DEACTIVATED, "admin_ext_deactivated", array('ext_name' => $ext_name));
+       } // END - if
+}
+
+// Checks wether the extension is older than given
+function EXT_VERSION_IS_OLDER ($ext_name, $ext_ver) {
+       // Get current extension version
+       $currVersion = GET_EXT_VERSION($ext_name);
+
+       // Remove all dots from both versions
+       $currVersion = str_replace(".", "", $currVersion);
+       $ext_ver = str_replace(".", "", $ext_ver);
+
+       // Now compare both and return the result
+       return ($currVersion < $ext_ver);
+}
+
+// Creates a new task for updated extension
+function CREATE_EXTENSION_UPDATE_TASK ($admin_id, $ext_name, $ext_ver, $notes) {
+       // Create subject line
+       $subject = "[UPDATE-".$ext_name."-".$ext_ver.":] ".ADMIN_UPDATE_EXT_SUBJ;
+
+       // Is the extension there?
+       if (GET_EXT_VERSION($ext_name) != "") {
+               // Check if task is not there
+               if (DETERMINE_TASK_ID_BY_SUBJECT($subject) == 0) {
+                       // Task not created so it's a brand-new extension which we need to register and create a task for!
+                       SQL_QUERY_ESC("INSERT INTO "._MYSQL_PREFIX."_task_system (assigned_admin, userid, status, task_type, subject, text, task_created) VALUES ('%s','0','NEW','EXTENSION_UPDATE','%s','%s', UNIX_TIMESTAMP())",
+                               array($admin_id, $subject, $notes), __FILE__, __LINE__);
+               } // END - if
+       } // END - if
+}
+
+// Creates a new task for newly installed extension
+function CREATE_NEW_EXTENSION_TASK ($admin_id, $subject, $ext) {
+       // Not installed and do we have created a task for the admin?
+       if ((DETERMINE_TASK_ID_BY_SUBJECT($subject) == 0) && (GET_EXT_VERSION($ext) == "")) {
+               // Template file
+               $tpl = sprintf("%stemplates/%s/html/ext/ext_%s.tpl",
+                       PATH,
+                       GET_LANGUAGE(),
+                       $ext
+               );
+
+               // Load text for task
+               if (FILE_READABLE($tpl)) {
+                       // Load extension's own text template (HTML!)
+                       $msg = LOAD_TEMPLATE("ext_".$ext, true);
+               } else {
+                       // Load default message
+                       $msg = LOAD_TEMPLATE("admin_new_ext", "", 0);
+               }
+
+               // Task not created so it's a brand-new extension which we need to register and create a task for!
+               SQL_QUERY_ESC("INSERT INTO "._MYSQL_PREFIX."_task_system (assigned_admin, userid, status, task_type, subject, text, task_created)
+VALUES (%s,0,'NEW','EXTENSION','%s','%s',UNIX_TIMESTAMP())",
+                       array(
+                               $admin_id,
+                               $subject,
+                               addslashes($msg),
+                       ),  __FILE__, __LINE__, true, false
+               );
+       } // END - if
+}
+
+// Creates a task for automatically deactivated (deprecated) extension
+function CREATE_EXTENSION_DEACTIVATION_TASK ($ext) {
+       // Create subject line
+       $subject = sprintf("[%s:] %s", $ext, TASK_SUBJ_EXTENSION_DEACTIVATED);
+
+       // Not installed and do we have created a task for the admin?
+       if ((DETERMINE_TASK_ID_BY_SUBJECT($subject) == 0) && (GET_EXT_VERSION($ext) != "")) {
+               // Task not created so add it
+               SQL_QUERY_ESC("INSERT INTO "._MYSQL_PREFIX."_task_system (assigned_admin, userid, status, task_type, subject, text, task_created)
+VALUES (0,0,'NEW','EXTENSION_DEACTIVATION','%s','%s',UNIX_TIMESTAMP())",
+                       array(
+                               $subject,
+                               addslashes(LOAD_TEMPLATE("task_ext_deactivated", true, $ext)),
+                       ),  __FILE__, __LINE__, true, false
+               );
+       } // END - if
+}
+
+// Checks if the module has a menu
+function MODULE_HAS_MENU ($mod, $forceDb = false) {
+       global $cacheArray;
+
+       // All is false by default
+       $ret = false;
+       //* DEBUG: */ print __FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>):mod={$mod},cache=".GET_EXT_VERSION("cache")."<br />\n";
+       if (GET_EXT_VERSION("cache") >= "0.1.2") {
+               // Cache version is okay, so let's check the cache!
+               if (isset($cacheArray['modules']['has_menu'][$mod])) {
+                       // Check module cache and count hit
+                       $ret = ($cacheArray['modules']['has_menu'][$mod] == "Y");
+                       incrementConfigEntry('cache_hits');
+               } elseif (isset($cacheArray['extensions']['ext_menu'][$mod])) {
+                       // Check cache and count hit
+                       $ret = ($cacheArray['extensions']['ext_menu'][$mod] == "Y");
+                       incrementConfigEntry('cache_hits');
+               } elseif ((IS_ADMIN()) && ($mod == "admin")) {
+                       // Admin module has always a menu!
+                       $ret = true;
+               }
+       } elseif ((GET_EXT_VERSION("sql_patches") >= "0.3.6") && ((!EXT_IS_ACTIVE("cache")) || ($forceDb === true))) {
+               // Check database for entry
+               $result = SQL_QUERY_ESC("SELECT has_menu FROM "._MYSQL_PREFIX."_mod_reg WHERE module='%s' LIMIT 1",
+                       array($mod), __FILE__, __LINE__);
+
+               // Entry found?
+               if (SQL_NUMROWS($result) == 1) {
+                       // Load "has_menu" column
+                       list($has_menu) = SQL_FETCHROW($result);
+
+                       // Fake cache... ;-)
+                       $cacheArray['extensions']['ext_menu'][$mod] = $has_menu;
+
+                       // Does it have a menu?
+                       $ret = ($has_menu == "Y");
+               } // END  - if
+
+               // Free memory
+               SQL_FREERESULT($result);
+       } elseif (GET_EXT_VERSION("sql_patches") == "") {
+               // No sql_patches installed, so maybe in admin area?
+               $ret = ((IS_ADMIN()) && ($mod == "admin")); // Then there is a menu!
+       }
+
+       // Return status
+       //* DEBUG: */ var_dump($ret);
+       return $ret;
+}
+
+// Determines the task id for given extension
+function DETERMINE_EXTENSION_TASK_ID ($ext_name) {
+       // Default is not found
+       $task_id = 0;
+
+       // Search for extension task's id
+       $result = SQL_QUERY_ESC("SELECT id FROM "._MYSQL_PREFIX."_task_system WHERE task_type='EXTENSION' AND subject='[%s:]' LIMIT 1",
+               array($ext_name), __FILE__, __LINE__);
+
+       // Entry found?
+       if (SQL_NUMROWS($result) == 1) {
+               // Task found so load task's ID and register extension...
+               list($task_id) = SQL_FETCHROW($result);
+       } // END - if
+
+       // Free result
+       SQL_FREERESULT($result);
+
+       // Return it
+       return $task_id;
+}
+
+// Determines the task id for given subject
+function DETERMINE_TASK_ID_BY_SUBJECT ($subject) {
+       // Default is not found
+       $task_id = 0;
+
+       // Search for task id
+       $result = SQL_QUERY_ESC("SELECT id FROM "._MYSQL_PREFIX."_task_system WHERE subject LIKE '%s%%' LIMIT 1",
+               array($subject), __FILE__, __LINE__);
+
+       // Entry found?
+       if (SQL_NUMROWS($result) == 1) {
+               // Task found so load task's ID and register extension...
+               list($task_id) = SQL_FETCHROW($result);
+       } // END - if
+
+       // Free result
+       SQL_FREERESULT($result);
+
+       // Return it
+       return $task_id;
+}
+
+// Add updates notes for given version
+function ADD_EXTENSION_NOTES ($ver, &$UPDATE_NOTES) {
+       // Init notes/content
+       $out = ""; $content = array();
+
+       // Is do we have verbose output enabled?
+       if ((getConfig('verbose_sql') == "Y") || (!EXT_IS_ACTIVE("sql_patches"))) {
+
+               // Update notes found?
+               if (!empty($UPDATE_NOTES)) {
+                       // Update notes found
+                       $content = array(
+                               'ver'   => $ver,
+                               'notes' => $UPDATE_NOTES
+                       );
+                       $UPDATE_NOTES = "";
+               } elseif (($ver == "0.0") || ($ver == "0.0.0")) {
+                       // Initial release
+                       $content = array(
+                               'ver'   => $ver,
+                               'notes' => INITIAL_RELEASE
+                       );
+               } else {
+                       // No update notes found!
+                       $content = array(
+                               'ver'   => $ver,
+                               'notes' => NO_UPDATE_NOTES
+                       );
+               }
+
+               // Load template
+               $out = LOAD_TEMPLATE("admin_ext_notes", true, $content);
+       } // END - if
+
+       // Return the output
+       return $out;
+}
+
 //
 ?>