X-Git-Url: https://git.mxchange.org/?p=mailer.git;a=blobdiff_plain;f=inc%2Fextensions.php;h=db279cffe9c2c3f5eff5b614d473f39759af26da;hp=9d2c0a44184b7fb6932aca4acb3dfab530ec9497;hb=2b388c21a07e07317ccb065d42ef7304cfca7718;hpb=4913351e083ec29bfd7d98710e6a9da6c92bd648

diff --git a/inc/extensions.php b/inc/extensions.php
index 9d2c0a4418..db279cffe9 100644
--- a/inc/extensions.php
+++ b/inc/extensions.php
@@ -10,7 +10,12 @@
  * -------------------------------------------------------------------- *
  * Kurzbeschreibung  : Erweiterungen-Management                         *
  * -------------------------------------------------------------------- *
- *                                                                      *
+ * $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                  *
@@ -37,109 +42,152 @@ if (!defined('__SECURITY')) {
 	require($INC);
 }
 
-//
-function EXTENSION_REGISTER ($ext_name, $id, $dry_run=false)
-{
-	global $NOTES, $_CONFIG, $INC_POOL, $cacheInstance;
+// Load the extension and maybe found language and function files.
+function LOAD_EXTENSION ($ext_name, $EXT_LOAD_MODE = "", $EXT_VER = "", $dry_run = false) {
+	global $INC_POOL;
 
-	// We want to register an extension and registration status is by default "failed" (= false)
-	$EXT_LOAD_MODE = "register"; $ret = false; $SQLs = array();
+	// Init array
 	$INC_POOL = array();
 
-	// This shall never do a non-admin user!
-	if (!IS_ADMIN()) return false;
+	// Is the extension already loaded?
+	//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "Loading extension {$ext_name}, mode={$EXT_LOAD_MODE}, ver={$EXT_VER}.");
+	if ((isset($GLOBALS['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 include filename and FQFN for extension file
+	$INC = sprintf("inc/extensions/ext-%s.php", $ext_name);
+	$FQFN = constant('PATH') . $INC;
+
+	// Is the extension file NOT there?
+	if (!INCLUDE_READABLE($INC)) {
+		// 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("inc/language/%s_%s.php", $ext_name, GET_LANGUAGE());
+
+	// Is this include there?
+	if ((FILE_READABLE($langInclude)) && (!isset($GLOBALS['ext_loaded']['lang'][$ext_name]))) {
+		// Then load it
+		//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "--- Language loaded.");
+		$GLOBALS['ext_loaded']['lang'][$ext_name] = true;
+		LOAD_INC_ONCE($langInclude);
+	} // END - if
+
+	// Construct FQFN for functions file
+	$funcsInclude = sprintf("inc/libs/%s_functions.php", $ext_name);
+
+	// Is this include there?
+	if ((FILE_READABLE($funcsInclude)) && (!isset($GLOBALS['ext_loaded']['funcs'][$ext_name]))) {
+		// Then load it
+		//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "--- Functions loaded.");
+		$GLOBALS['ext_loaded']['funcs'][$ext_name] = true;
+		LOAD_INC_ONCE($funcsInclude);
+	} // END - if
 
-	// By default the language prefix is the extension's name
-	// @TODO: Do we really need this one anymore? Can't we just take $ext_name and done?
-	$EXT_LANG_PREFIX = $ext_name;
+	// Extensions are not deprecated by default
+	EXT_SET_DEPRECATED("N");
 
-	// By default we have no failtures
-	$EXT_REPORTS_FAILURE = false;
+	// Extensions are not always active by default
+	EXT_SET_ALWAYS_ACTIVE("N");
+
+	// By default an extension update does not depend on other extensions
+	EXT_SET_UPDATE_DEPENDS("");
+
+	// Extension update notes
+	EXT_SET_UPDATE_NOTES("");
+
+	// Include the extension file
+	//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "Extension loaded.");
+	require($FQFN);
+
+	// Is this extension deprecated?
+	if (EXT_GET_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...
+		$GLOBALS['ext_loaded']['ext'][$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 $INC_POOL;
+	global $NOTES;
+
+	// 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 queries
+	INIT_SQLS();
 
-	// Does this extension exists?
-	if (FILE_READABLE($file)) {
-		// Extension was found so we can load it in registration mode
-		$EXT_ALWAYS_ACTIVE = "N";
-		require($file);
+	// Init variables
+	$ret = false;
+	$NOTES = "";
+	$INC_POOL = array();
 
+	// By default we have no failures
+	EXT_SET_REPORTS_FAILURE(false);
+
+	// Does this extension exists?
+	if (LOAD_EXTENSION($ext_name, "register", "", $dry_run)) {
 		// And run possible updates
-		$EXT_LOAD_MODE = "update"; $EXT_UPDATE_DEPENDS = "";
-		foreach ($EXT_VER_HISTORY as $EXT_VER) {
+		$history = EXT_GET_VER_HISTORY();
+		foreach ($history as $ver) {
+			//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "ext_name={$ext_name}, ext_ver={$ver}");
 			// Load extension in update mode
-			require($file);
-
-			// Do we have an update?
-			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 {
-					// No update notes found!
-					$NOTES .= "<STRONG>v".$EXT_VER.":</STRONG><br /><I>".NO_UPDATE_NOTES."</I><br /><br />\n";
-				}
-			} // END - if
+			LOAD_EXTENSION($ext_name, "update", $ver, $dry_run);
+
+			// Add update notes to our output
+			$NOTES .= ADD_EXTENSION_NOTES($ver);
 		} // END - foreach
 
 		// Does this extension depends on an outstanding update of another update?
-		if (!empty($EXT_UPDATE_DEPENDS)) {
+		if (EXT_GET_UPDATE_DEPENDS() != "") {
 			// Backup SQL commands and clear current
-			$SQLs2 = $SQLs;
-			$SQLs  = array();
+			$SQLs2 = GET_SQLS();
+			INIT_SQLS();
 			$test  = false;
-
-			// Load required extension also in update mode
-			$file = sprintf("%sinc/extensions/ext-%s.php", PATH, $EXT_UPDATE_DEPENDS);
+			$ext_update = EXT_GET_UPDATE_DEPENDS();
 
 			// Check for required file
-			if (FILE_READABLE($file)) {
-				// Bacup version number
-				$VER_BACKUP = $EXT_VERSION;
-
-				// Backup language as well
-				$LANG_BCK = $EXT_LANG_PREFIX;
-
-				// Save the Parrent $EXT_ALWAYS_ACTIVE for later!
-				$EXT_ALWAYS_ACTIVE_PARRENT = $EXT_ALWAYS_ACTIVE;
-
-				// Set EXT_ALWAYS_ACTIVE for update
-				$EXT_ALWAYS_ACTIVE = "N";
-
-				// File exists so let's load it
-				require($file);
-
+			if (LOAD_EXTENSION($ext_update, "register", "", $dry_run)) {
 				// If versions mismatch update extension first
-				$ext_ver = GET_EXT_VERSION($EXT_UPDATE_DEPENDS);
+				$ext_ver = GET_EXT_VERSION($ext_update);
 
-				// Extension version set?
+				// 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__);
+					$task = DETERMINE_EXTENSION_TASK_ID($ext_update);
 
 					// Entry found?
-					if (SQL_NUMROWS($result) == 1) {
-						// Task found so load task's ID and register extension...
-						list($task) = SQL_FETCHROW($result);
-
+					if ($task > 0) {
 						// Try to register the extension
-						$test = EXTENSION_REGISTER($EXT_UPDATE_DEPENDS, $task, $dry_run);
+						$test = EXTENSION_REGISTER($ext_update, $task, $dry_run, false);
 					} // END - if
-
-					// Free result
-					SQL_FREERESULT($result);
-				} elseif ($ext_ver != $EXT_VERSION) {
+				} elseif ($ext_ver != EXT_GET_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!
 					$test = true;
@@ -147,15 +195,6 @@ function EXTENSION_REGISTER ($ext_name, $id, $dry_run=false)
 					// Nothing to register / update before...
 					$test = true;
 				}
-
-				// Restore version number
-				$EXT_VERSION = $VER_BACKUP;
-
-				// Restore language back
-				$EXT_LANG_PREFIX = $LANG_BCK;
-
-				// Restore $EXT_ALWAYS_ACTIVE with the value from parrent
-				$EXT_ALWAYS_ACTIVE = $EXT_ALWAYS_ACTIVE_PARRENT;
 			} else {
 				// Required file for update does not exists!
 				$test = true;
@@ -163,7 +202,7 @@ function EXTENSION_REGISTER ($ext_name, $id, $dry_run=false)
 			}
 
 			// Finally restore previous SQLs
-			$SQLs = $SQLs2; unset($SQLs2);
+			SET_SQLS($SQLs2); unset($SQLs2);
 		} else {
 			// Does not depend on an other extension
 			$test = true;
@@ -172,222 +211,156 @@ function EXTENSION_REGISTER ($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);
+		// Remains true if extension registration reports no failures
+		$test = (($test === true) && (EXT_GET_REPORTS_FAILURE() === false));
 
 		// 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
-
-					// Remove array
-					unset($INC_POOL);
-				} // END - if
+				// Run installation pre-installation filters
+				runFilterChain('pre_extension_installed', array('dry_run' => $dry_run));
 
 				// 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_GET_ALWAYS_ACTIVE(), EXT_GET_VERSION()), __FILE__, __LINE__);
 
-				// Update task management
-				ADMIN_SOLVE_TASK($id);
-
-				// @TODO This causes the whole (!) menu cache being purged
-				CACHE_PURGE_ADMIN_MENU();
+				// Remove cache file(s) if extension is active
+				runFilterChain('post_extension_installed', array('ext_name' => $ext_name, 'task_id' => $task_id, 'inc_pool' => $INC_POOL));
 
 				// In normal mode return a true on success
 				$ret = true;
-
-				// Remove SQLs
-				unset($SQLs);
 			} else {
 				// Rewrite SQL command to keep { and } inside
-				foreach ($SQLs as $key => $sql) {
+				foreach (GET_SQLS() as $key => $sql) {
 					$sql = str_replace('{', "&#123;", str_replace('}', "&#125;", $sql));
-					$SQLs[$key] = $sql;
+					SET_SQL_KEY($key, $sql);
 				} // END - foreach
 
 				// In  "dry-run" mode return array with all SQL commands
-				$ret = $SQLs;
+				$ret = GET_SQLS();
 
 				// Remove all SQL commands
-				unset($SQLs);
+				UNSET_SQLS();
 			}
 		} else {
 			// 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 ($logout === true) {
+			// Then redirect to logout
+			LOAD_URL("modules.php?module=admin&amp;logout=1&amp;".$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) {
-	global $cacheInstance, $_CONFIG;
-	$SQLs = array();
 
-	// Extensions are never active by default
-	$EXT_ALWAYS_ACTIVE = "N";
+// Run SQL queries for given extension id
+// @TODO Change from ext_id to ext_name (not just even the variable! ;-) )
+function EXTENSION_RUN_SQLS ($ext_id, $load_mode) {
+	// This shall never do a non-admin user!
+	if (!IS_ADMIN()) return false;
+
+	// Init array
+	INIT_SQLS();
 
 	// 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 it is not set then maybe there is no extension for that ID number
 	if (empty($ext_name)) return false;
 
 	// Load extension in detected mode
-	//* DEBUG: */ print __FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>):ext_name[{$id}]={$ext_name}<br />\n";
-	$file = sprintf("%sinc/extensions/ext-%s.php", PATH, $ext_name);
-	if (FILE_READABLE($file)) {
-		// Load the include
-		require($file);
-	} // END - if
+	//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ":ext_name[{$ext_id}]={$ext_name}");
+	LOAD_EXTENSION($ext_name, $load_mode, "", false);
 
-	//* DEBUG: */ print __FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>):SQLs::count=".count($SQLs)."<br />\n";
-	if ((is_array($SQLs) && (sizeof($SQLs) > 0))) {
+	//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ":SQLs::count=".COUNT_SQLS()."");
+	if ((IS_SQLS_VALID() && (COUNT_SQLS() > 0))) {
 		// Run SQL commands...
-		foreach ($SQLs as $sql) {
-			// Trim spaces away which we don't need
-			$sql = trim($sql);
-
-			// Is there still an SQL query?
-			if (!empty($sql)) {
-				// Do we have an "ALTER TABLE" command?
-				//* DEBUG: */ print __FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>):SQL={$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
+		runFilterChain('run_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__);
-		} // END - if
-
-		//* DEBUG: */ print __FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>):mode={$EXT_LOAD_MODE}<br />\n";
-
-		// Is this the sql_patches?
-		//* DEBUG: */ echo __LINE__.": {$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");
+			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
 
 	// Remove cache file(s) if extension is active
-	if (((EXT_IS_ACTIVE("cache")) || (GET_EXT_VERSION("cache") != "")) && (((SQL_AFFECTEDROWS() == 1)) || ($sqlRan === true) || ($EXT_LOAD_MODE == "activate") || ($EXT_LOAD_MODE == "deactivate"))) {
-		//* DEBUG: */ echo __LINE__.": DESTROY!<br />\n";
-		// Remove cache files
-		if ($cacheInstance->cache_file("extensions", true)) $cacheInstance->cache_destroy();
-		if ($cacheInstance->cache_file("mod_reg", true))    $cacheInstance->cache_destroy();
-		if ($cacheInstance->cache_file("config", true))     $cacheInstance->cache_destroy();
-
-		// @TODO This causes the whole (!) menu cache being purged
-		CACHE_PURGE_ADMIN_MENU();
+	if (((EXT_IS_ACTIVE("cache")) || (GET_EXT_VERSION("cache") != "")) && (((SQL_AFFECTEDROWS() == 1)) || ($sqlRan === true) || ($load_mode == "activate") || ($load_mode == "deactivate"))) {
+		// Run filters
+		runFilterChain('post_extension_run_sql', $ext_name);
+	} // END - if
+
+	// Is this the sql_patches?
+	//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": {$ext_id}/{$ext_name}/{$load_mode}");
+	if (($ext_name == "sql_patches") && (($load_mode == "register") || ($load_mode == "remove"))) {
+		// Then redirect to logout
+		//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": LOAD!");
+		LOAD_URL("modules.php?module=admin&amp;logout=1&amp;".$load_mode."=sql_patches");
 	} // END - if
 }
+
 // Check if given extension is active
 function EXT_IS_ACTIVE ($ext_name) {
-	global $cacheArray, $_CONFIG;
-
 	// Extensions are all inactive during installation
-	if ((!isBooleanConstantAndTrue('mxchange_installed')) || (isBooleanConstantAndTrue('mxchange_installing')) || (empty($ext_name))) return false;
+	if ((!isInstalled()) || (isInstalling()) || (empty($ext_name))) return false;
 
 	// Not active is the default
 	$active = "N";
 
 	// Check cache
-	if (!empty($cacheArray['extensions']['ext_active'][$ext_name])) {
+	if (isset($GLOBALS['cache_array']['extensions']['ext_active'][$ext_name])) {
 		// Load from cache
-		//* DEBUG: */ echo "CACHE! ext_name={$ext_name}<br />\n";
-		$active = $cacheArray['extensions']['ext_active'][$ext_name];
+		//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "CACHE! ext_name={$ext_name}");
+		$active = $GLOBALS['cache_array']['extensions']['ext_active'][$ext_name];
 
 		// Count cache hits
-		if (isset($_CONFIG['cache_hits'])) $_CONFIG['cache_hits']++;
+		incrementConfigEntry('cache_hits');
+	} elseif (isset($GLOBALS['ext_loaded'][$ext_name])) {
+		// Extension is loaded!
+		die("LOADED:$ext_name");
 	} elseif (($ext_name == "cache") || (GET_EXT_VERSION("cache") == "")) {
-		//* DEBUG: */ echo "DB! ext_name={$ext_name}<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;
-		}
+		$result = SQL_QUERY_ESC("SELECT ext_active FROM `{!_MYSQL_PREFIX!}_extensions` WHERE ext_name='%s' LIMIT 1",
+			array($ext_name), __FILE__, __LINE__);
 
-		// Load entry
-		list($active) = SQL_FETCHROW($result);
+		// 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}<br />\n";
-		$cacheArray['extensions']['ext_active'][$ext_name] = $active;
+		//* DEBUG: */ echo $ext_name."[DB]: {$active}");
+		$GLOBALS['cache_array']['extensions']['ext_active'][$ext_name] = $active;
 	} else {
 		// Extension not active!
-		//* DEBUG: */ echo $ext_name.": Not active!<br />\n";
-		$cacheArray['extensions']['ext_active'][$ext_name] = "N";
+		//* DEBUG: */ echo $ext_name.": Not active!");
+		$GLOBALS['cache_array']['extensions']['ext_active'][$ext_name] = "N";
 	}
 
 	// Debug message
@@ -398,239 +371,231 @@ function EXT_IS_ACTIVE ($ext_name) {
 }
 // Get version from extensions
 function GET_EXT_VERSION ($ext_name) {
-	global $cacheArray, $_CONFIG, $cacheInstance;
-	$ret = false;
+	// By default no extension is found
+	$ext_ver = false;
 
 	// Extensions are all inactive during installation
-	if ((!isBooleanConstantAndTrue('mxchange_installed')) || (isBooleanConstantAndTrue('mxchange_installing'))) return "";
-	//* DEBUG: */ print __FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>): ext_name={$ext_name}<br />\n";
+	if ((!isInstalled()) || (isInstalling())) return "";
+	//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": ext_name={$ext_name}");
 
 	// Is the cache written?
-	if (!empty($cacheArray['extensions']['ext_version'][$ext_name])) {
+	if (isset($GLOBALS['cache_array']['extensions']['ext_version'][$ext_name])) {
 		// Load data from cache
-		//* DEBUG: */ print __FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>): CACHE!<br />\n";
-		$ret = $cacheArray['extensions']['ext_version'][$ext_name];
+		//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": CACHE!");
+		$ext_ver = $GLOBALS['cache_array']['extensions']['ext_version'][$ext_name];
 
 		// Count cache hits
-		if (isset($_CONFIG['cache_hits'])) $_CONFIG['cache_hits']++; else $_CONFIG['cache_hits'] = 1;
-	} elseif (!is_object($cacheInstance)) {
+		incrementConfigEntry('cache_hits');
+	} elseif (!isCacheInstanceValid()) {
 		// 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);
+		$result = SQL_QUERY_ESC("SELECT ext_version FROM `{!_MYSQL_PREFIX!}_extensions` WHERE ext_name='%s' LIMIT 1",
+			array($ext_name), __FILE__, __LINE__);
+		//* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": DB - ".SQL_NUMROWS($result)."");
+
+		// Is the extension there?
+		if (SQL_NUMROWS($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;
+		$GLOBALS['cache_array']['extensions']['ext_version'][$ext_name] = $ext_ver;
 	}
 
 	// Return result
-	//* DEBUG: */ print __FUNCTION__."(<font color=\"#0000aa\">".__LINE__."</font>): 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;
+	global $NOTES;
+	global $INC_POOL;
 
 	// Init arrays
-	$SQLs = array(); $INC_POOL = array();
+	INIT_SQLS();
+	$INC_POOL = array();
+
+	// Init notes
+	$NOTES = "";
 
 	// Only admins are allowed to update extensions
-	if ((!IS_ADMIN()) || (empty($ext))) return false;
+	if ((!IS_ADMIN()) || (empty($ext_name))) return false;
 
-	// Load extension in update mode
-	$EXT_LOAD_MODE = "update"; $EXT_UPDATE_DEPENDS = ""; $NOTES = "";
+	// Load extension in test mode
+	LOAD_EXTENSION($ext_name, "test", $ext_ver, $dry_run);
 
-	// Load extension file
-	include(sprintf("%sinc/extensions/%s", PATH, $file));
+	// Save version history
+	$history = EXT_GET_VER_HISTORY();
 
-	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);
-	}
+	// Remove old SQLs array to prevent possible bugs
+	INIT_SQLS();
 
 	// Check if version is updated
-	if ((($EXT_VERSION != $EXT_VER) || ($dry_run)) && (is_array($EXT_VER_HISTORY)))
-	{
+	if (((EXT_GET_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); $idx < count($history); $idx++) {
+			// Set extension version
+			$GLOBALS['cache_array']['update_ver'][$ext_name] = $history[$idx];
 
-			// Set version
-			$EXT_VER = $EXT_VER_HISTORY[$idx];
+			// Load again...
+			LOAD_EXTENSION($ext_name, "update", $GLOBALS['cache_array']['update_ver'][$ext_name], $dry_run);
 
-			// Include again...
-			include(PATH."inc/extensions/".$file);
+			if (EXT_GET_UPDATE_DEPENDS() != "") {
+				// Backup current SQL queries
+				$GLOBALS['cache_array']['update_sqls'][$ext_name] = GET_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_GET_UPDATE_DEPENDS()) != "") {
+					// Update another extension first!
+					$test = EXTENSION_UPDATE(EXT_GET_UPDATE_DEPENDS(), GET_EXT_VERSION(EXT_GET_UPDATE_DEPENDS()), $dry_run);
+				} else {
+					// Register new extension
+					$test = EXTENSION_REGISTER(EXT_GET_UPDATE_DEPENDS(), 0, $dry_run, false);
 				}
-			}
 
-			// In real-mode execute any existing includes
-			if ((!$dry_run) && (count($INC_POOL) > 0)) {
-				// Include all files
-				foreach ($INC_POOL as $fqfn) {
-					require_once($fqfn);
-				} // END - foreach
+				// Restore previous SQL queries
+				SET_SQLS($GLOBALS['cache_array']['update_sqls'][$ext_name]);
+				unset($GLOBALS['cache_array']['update_sqls'][$ext_name]);
 			} // END - if
 
-			// 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();
-			}
-		}
+			// Add notes
+			$NOTES .= ADD_EXTENSION_NOTES($GLOBALS['cache_array']['update_ver'][$ext_name]);
+		} // END - for
+
+		// In real-mode execute any existing includes
+		if (!$dry_run) {
+			$GLOBALS['cache_array']['inc_pool'][$ext_name] = $INC_POOL;
+			runFilterChain('load_includes', $INC_POOL);
+			$INC_POOL = $GLOBALS['cache_array']['inc_pool'][$ext_name];
+			unset($GLOBALS['cache_array']['inc_pool'][$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;
+		// Run SQLs
+		runFilterChain('run_sqls', array('dry_run' => $dry_run));
 
+		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, $GLOBALS['cache_array']['update_ver'][$ext_name], SQL_ESCAPE($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)    $cacheInstance->cache_destroy();
-			} // END - if
+			SQL_QUERY_ESC("UPDATE `{!_MYSQL_PREFIX!}_extensions` SET ext_version='%s' WHERE ext_name='%s' LIMIT 1",
+				array($GLOBALS['cache_array']['update_ver'][$ext_name], $ext_name), __FILE__, __LINE__);
 
-			// Remove array
-			unset($SQLs);
-		} else {
-			// In "dry-run" mode return array with SQL commands
-			return $SQLs;
-		}
-	}
+			// Remove arrays
+			UNSET_SQLS();
+			unset($GLOBALS['cache_array']['update_ver'][$ext_name]);
+
+			// Run filters on success extension update
+			runFilterChain('extension_update', $ext_name);
+		} // END - if
+	} // END - if
 }
-//
-function EXTENSION_VERBOSE_TABLE($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 = "", $dashed = "", $switch = false, $width = "100%") {
+	// Empty title?
+	if (empty($title)) {
+		// Then fix it to default
+		$title = getMessage('ADMIN_SQLS_EXECUTED_ON_REMOVAL');
+	} // END - if
+
+	// Are there some queries in $queries?
+	if (count($queries) > 0) {
+		// Then use them instead!
+		SET_SQLS($queries);
+	} // END - if
+
+	// Init variables
+	$SW = 2; $i = 1;
 	$OUT = "";
-	if ((is_array($SQLs)) && (GET_EXT_VERSION("sql_patches") >= "0.0.7") && ($_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";
-		foreach ($SQLs as $idx => $sql) {
+
+	// Do we have queries?
+	if ((IS_SQLS_VALID()) && (GET_EXT_VERSION("sql_patches") >= "0.0.7") && (getConfig('verbose_sql') == "Y")) {
+		foreach (GET_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 ((!$S) && (GET_EXT_VERSION("sql_patches") >= "0.0.7") && ($_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, getMessage('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) {
+	// Init extension name
 	$ret = "";
-	global $cacheArray, $_CONFIG;
-	if (!empty($cacheArray['extensions']['ext_name'][$id])) {
+
+	// Is cache there?
+	if (isset($GLOBALS['cache_array']['extensions']['ext_name'][$ext_id])) {
 		// Load from cache
-		$ret = $cacheArray['extensions']['ext_name'][$id];
+		$ret = $GLOBALS['cache_array']['extensions']['ext_name'][$ext_id];
 
 		// Count cache hits
-		if (isset($_CONFIG['cache_hits'])) { $_CONFIG['cache_hits']++; } else { $_CONFIG['cache_hits'] = 1; }
+		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__);
+		$result = SQL_QUERY_ESC("SELECT ext_name FROM `{!_MYSQL_PREFIX!}_extensions` WHERE id=%s LIMIT 1",
+			array(bigintval($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) {
+	// Init ID number
 	$ret = 0;
-	global $cacheArray, $_CONFIG;
-	if (isset($cacheArray['extensions']['ext_id'][$name])) {
+	if (isset($GLOBALS['cache_array']['extensions']['ext_id'][$ext_name])) {
 		// Load from cache
-		$ret = $cacheArray['extensions']['ext_id'][$name];
+		$ret = $GLOBALS['cache_array']['extensions']['ext_id'][$ext_name];
 
 		// Count cache hits
-		if (isset($_CONFIG['cache_hits'])) { $_CONFIG['cache_hits']++; } else { $_CONFIG['cache_hits'] = 1; }
+		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__);
+		$result = SQL_QUERY_ESC("SELECT id FROM `{!_MYSQL_PREFIX!}_extensions` WHERE ext_name='%s' LIMIT 1",
+			array($ext_name), __FILE__, __LINE__);
 		list($ret) = SQL_FETCHROW($result);
 		SQL_FREERESULT($result);
 	}
@@ -638,10 +603,11 @@ function GET_EXT_ID($name) {
 	// Return value
 	return $ret;
 }
+
 // Activate given extension
-function ACTIVATE_EXTENSION($ext_name) {
+function ACTIVATE_EXTENSION ($ext_name) {
 	// Activate the extension
-	$result = SQL_QUERY_ESC("UPDATE "._MYSQL_PREFIX."_extensions SET ext_active='Y' WHERE ext_name='%s' LIMIT 1",
+	SQL_QUERY_ESC("UPDATE `{!_MYSQL_PREFIX!}_extensions` SET ext_active='Y' WHERE ext_name='%s' LIMIT 1",
 		array($ext_name), __FILE__, __LINE__);
 
 	// Extension has been activated?
@@ -650,6 +616,30 @@ function ACTIVATE_EXTENSION($ext_name) {
 		EXTENSION_RUN_SQLS(GET_EXT_ID($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(
+			getMessage('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, $ext_ver) {
 	// Get current extension version
@@ -663,5 +653,305 @@ function EXT_VERSION_IS_OLDER ($ext_name, $ext_ver) {
 	return ($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",
+			constant('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,
+				$subject,
+				SQL_ESCAPE($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", $ext, getMessage('TASK_SUBJ_EXTENSION_DEACTIVATED'));
+
+	// Not installed and do we have created a task for the admin?
+	if ((DETERMINE_TASK_ID_BY_SUBJECT($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,
+				SQL_ESCAPE(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) {
+	// 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($GLOBALS['cache_array']['modules']['has_menu'][$mod])) {
+			// Check module cache and count hit
+			$ret = ($GLOBALS['cache_array']['modules']['has_menu'][$mod] == "Y");
+			incrementConfigEntry('cache_hits');
+		} elseif (isset($GLOBALS['cache_array']['extensions']['ext_menu'][$mod])) {
+			// Check cache and count hit
+			$ret = ($GLOBALS['cache_array']['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... ;-)
+			$GLOBALS['cache_array']['extensions']['ext_menu'][$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 or no admin registered?
+		$ret = (((IS_ADMIN()) || (!isAdminRegistered())) && ($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) {
+	// 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 (EXT_GET_UPDATE_NOTES() != "") {
+			// Update notes found
+			$content = array(
+				'ver'   => $ver,
+				'notes' => EXT_GET_UPDATE_NOTES()
+			);
+			EXT_SET_UPDATE_NOTES("");
+		} elseif (($ver == "0.0") || ($ver == "0.0.0")) {
+			// Initial release
+			$content = array(
+				'ver'   => $ver,
+				'notes' => getMessage('INITIAL_RELEASE')
+			);
+		} else {
+			// No update notes found!
+			$content = array(
+				'ver'   => $ver,
+				'notes' => getMessage('NO_UPDATE_NOTES')
+			);
+		}
+
+		// Load template
+		$out = LOAD_TEMPLATE("admin_ext_notes", true, $content);
+	} // END - if
+
+	// Return the output
+	return $out;
+}
+
+// Getter for CSS files array
+function EXT_GET_CSS_FILES () {
+	// By default no additional CSS files are found
+	$cssFiles = array();
+
+	// Is the array there?
+	if (isset($GLOBALS['css_files'])) {
+		// Then use it
+		$cssFiles = $GLOBALS['css_files'];
+	} // END - if
+
+	// Return array
+	return $cssFiles;
+}
+
+// Init CSS files array
+function EXT_INIT_CSS_FILES () {
+	// Simply init it
+	$GLOBALS['css_files'] = array();
+}
+
+// Add new entry
+function EXT_ADD_CSS_FILE ($file) {
+	// Is the array there?
+	if (!isset($GLOBALS['css_files'])) {
+		// Then auto-init them
+		EXT_INIT_CSS_FILES();
+	} // END - if
+
+	// Add the entry
+	$GLOBALS['css_files'][] = $file;
+}
+
+// Setter for EXT_ALWAYS_ACTIVE flag
+function EXT_SET_ALWAYS_ACTIVE ($active) {
+	$GLOBALS['ext_always_active'] = $active;
+}
+
+// Getter for EXT_ALWAYS_ACTIVE flag
+function EXT_GET_ALWAYS_ACTIVE () {
+	return $GLOBALS['ext_always_active'];
+}
+
+// Setter for EXT_VERSION flag
+function EXT_SET_VERSION ($version) {
+	$GLOBALS['ext_version'] = $version;
+}
+
+// Getter for EXT_VERSION flag
+function EXT_GET_VERSION () {
+	return $GLOBALS['ext_version'];
+}
+
+// Setter for EXT_DEPRECATED flag
+function EXT_SET_DEPRECATED ($deprecated) {
+	$GLOBALS['ext_deprecated'] = $deprecated;
+}
+
+// Getter for EXT_DEPRECATED flag
+function EXT_GET_DEPRECATED () {
+	return $GLOBALS['ext_deprecated'];
+}
+
+// Setter for EXT_UPDATE_DEPENDS flag
+function EXT_SET_UPDATE_DEPENDS ($updateDepends) {
+	$GLOBALS['ext_update_depends'] = $updateDepends;
+}
+
+// Getter for EXT_UPDATE_DEPENDS flag
+function EXT_GET_UPDATE_DEPENDS () {
+	return $GLOBALS['ext_update_depends'];
+}
+
+// Setter for EXT_REPORTS_FAILURE flag
+function EXT_SET_REPORTS_FAILURE ($reportsFailure) {
+	$GLOBALS['ext_reports_failure'] = $reportsFailure;
+}
+
+// Getter for EXT_REPORTS_FAILURE flag
+function EXT_GET_REPORTS_FAILURE () {
+	return $GLOBALS['ext_reports_failure'];
+}
+
+// Setter for EXT_VER_HISTORY flag
+function EXT_SET_VER_HISTORY ($verHistory) {
+	$GLOBALS['ext_ver_history'] = (array) $verHistory;
+}
+
+// Getter for EXT_VER_HISTORY flag
+function EXT_GET_VER_HISTORY () {
+	return $GLOBALS['ext_ver_history'];
+}
+
+// Setter for EXT_UPDATE_NOTES flag
+function EXT_SET_UPDATE_NOTES ($updateNotes) {
+	$GLOBALS['ext_update_notes'] = (array) $updateNotes;
+}
+
+// Getter for EXT_UPDATE_NOTES flag
+function EXT_GET_UPDATE_NOTES () {
+	return $GLOBALS['ext_update_notes'];
+}
+
 //
 ?>