egroupware/phpgwapi/inc/class.common.inc.php

<?php
	/**************************************************************************\
	* eGroupWare API - Commononly used functions                               *
	* This file written by Dan Kuykendall <seek3r@phpgroupware.org>            *
	* and Joseph Engo <jengo@phpgroupware.org>                                 *
	* and Mark Peters <skeeter@phpgroupware.org>                               *
	* and Lars Kneschke <lkneschke@linux-at-work.de>                           *
	* Functions commonly used by eGroupWare developers                         *
	* Copyright (C) 2000, 2001 Dan Kuykendall                                  *
	* Copyright (C) 2003 Lars Kneschke                                         *
	* -------------------------------------------------------------------------*
	* This library is part of the eGroupWare API                               *
	* http://www.egroupware.org                                                *
	* ------------------------------------------------------------------------ *
	* This library is free software; you can redistribute it and/or modify it  *
	* under the terms of the GNU Lesser General Public License as published by *
	* the Free Software Foundation; either version 2.1 of the License,         *
	* or any later version.                                                    *
	* This library is distributed in the hope that it will be useful, but      *
	* WITHOUT ANY WARRANTY; without even the implied warranty of               *
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                     *
	* See the GNU Lesser General Public License for more details.              *
	* You should have received a copy of the GNU Lesser General Public License *
	* along with this library; if not, write to the Free Software Foundation,  *
	* Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA            *
	\**************************************************************************/

	/* $Id$ */

	$d1 = strtolower(@substr(EGW_API_INC,0,3));
	$d2 = strtolower(@substr(EGW_SERVER_ROOT,0,3));
	$d3 = strtolower(@substr(EGW_APP_INC,0,3));
	if($d1 == 'htt' || $d1 == 'ftp' || $d2 == 'htt' || $d2 == 'ftp' || $d3 == 'htt' || $d3 == 'ftp')
	{
		echo 'Failed attempt to break in via an old Security Hole!<br>'."\n";
		exit;
	}
	unset($d1);unset($d2);unset($d3);

	/**
	 * common class that contains commonly used functions
	 *
	 */
	class common
	{
		var $debug_info; // An array with debugging info from the API
		var $found_files;

		/**
		 * Compares two Version strings and return 1 if str2 is newest (bigger version number) than str1
		 *
		 * This function checks for major version only.
		 * @param $str1
		 * @param $str2
		 */
		function cmp_version($str1,$str2,$debug=False)
		{
			ereg("([0-9]+)\.([0-9]+)\.([0-9]+)[a-zA-Z]*([0-9]*)",$str1,$regs);
			ereg("([0-9]+)\.([0-9]+)\.([0-9]+)[a-zA-Z]*([0-9]*)",$str2,$regs2);
			if($debug) { echo "<br>$regs[0] - $regs2[0]"; }

			for($i=1;$i<5;$i++)
			{
				if($debug) { echo "<br>$i: $regs[$i] - $regs2[$i]"; }
				if($regs2[$i] == $regs[$i])
				{
					continue;
				}
				if($regs2[$i] > $regs[$i])
				{
					return 1;
				}
				elseif($regs2[$i] < $regs[$i])
				{
					return 0;
				}
			}
		}

		/**
		 * Compares two Version strings and return 1 if str2 is newest (bigger version number) than str1
		 *
		 * This function checks all fields. cmp_version() checks release version only.
		 * @param $str1
		 * @param $str2
		 */
		function cmp_version_long($str1,$str2,$debug=False)
		{
			ereg("([0-9]+)\.([0-9]+)\.([0-9]+)[a-zA-Z]*([0-9]*)\.([0-9]*)",$str1,$regs);
			ereg("([0-9]+)\.([0-9]+)\.([0-9]+)[a-zA-Z]*([0-9]*)\.([0-9]*)",$str2,$regs2);
			if($debug) { echo "<br>$regs[0] - $regs2[0]"; }

			for($i=1;$i<6;$i++)
			{
				if($debug) { echo "<br>$i: $regs[$i] - $regs2[$i]"; }

				if($regs2[$i] == $regs[$i])
				{
					if($debug) { echo ' are equal...'; }
					continue;
				}
				if($regs2[$i] > $regs[$i])
				{
					if($debug) { echo ', and a > b'; }
					return 1;
				}
				elseif($regs2[$i] < $regs[$i])
				{
					if($debug) { echo ', and a < b'; }
					return 0;
				}
			}
			if($debug) { echo ' - all equal.'; }
		}

		/**
		 * Convert an array into the format needed for the access column
		 *
		 * @param $access
		 * @param $array
		 */
		function array_to_string($access,$array)
		{
			$this->debug_info[] = 'array_to_string() is a depreciated function - use ACL instead';
			$s = '';
			if ($access == 'group' || $access == 'public' || $access == 'none')
			{
				if (count($array))
				{
					while (($t = each($array)))
					{
						$s .= ',' . $t[1];
					}
					$s .= ',';
				}
				if (! count($array) && $access == 'none')
				{
					$s = '';
				}
			}
			return $s;
		}
		
		/**
		* generate a unique id, which can be used for syncronisation
		*
		* @param string $_appName the appname
		* @param string $_eventID the id of the content
		* @return string the unique id
		*/
		function generate_uid($_appName, $_eventID)
		{
			if(empty($_appName) || empty($_eventID)) return false;
			
			$suffix = $GLOBALS['egw_info']['server']['hostname'] ? $GLOBALS['egw_info']['server']['hostname'] : 'local';
			$prefix = $_appName.'-'.$_eventID.'-'.$GLOBALS['egw_info']['server']['install_id'];
			
			return $prefix;
		}
		
		/**
		* get the local content id from a global UID
		*
		* @param sting $_globalUid the global UID
		* @return int local egw content id
		*/
		function get_egwId($_globalUid)
		{
			if(empty($_globalUid)) return false;
			
			$globalUidParts = explode('-',$_globalUid);
			array_shift($globalUidParts);	// remove the app name
			array_pop($globalUidParts);		// remove the install_id
			
			return implode('-',$globalUidParts);	// return the rest, allowing to have dashs in the id, can happen with LDAP!
		}

		// This is used for searching the access fields
		/**
		 * this function is used for searching the access fields
		 *
		 * @param $table
		 * @param $owner
		 */
		function sql_search($table,$owner=0)
		{
			$this->debug_info[] = 'sql_search() is a deprecated function - use ACL instead';
			$s = '';
			if (!$owner)
			{
				$owner = $GLOBALS['egw_info']['user']['account_id'];
			}
			$groups = $GLOBALS['egw']->accounts->membership((int)$owner);
			if(@is_array($groups))
			{
				while ($group = each($groups))
				{
					$s .= " OR $table LIKE '%," . $group[2] . ",%'";
				}
			}
			return $s;
		}

		/**
		 * return an array of installed languages
		 *
		 * @return $installedLanguages; an array containing the installed languages
		 */
		function getInstalledLanguages()
		{
			$GLOBALS['egw']->db->query('SELECT DISTINCT lang FROM egw_lang');
			while (@$GLOBALS['egw']->db->next_record())
			{
				$installedLanguages[$GLOBALS['egw']->db->f('lang')] = $GLOBALS['egw']->db->f('lang');
			}

			return $installedLanguages;
		}

		/**
		 * return the preferred langugae of the users
		 *
		 * it uses HTTP_ACCEPT_LANGUAGE (from the users browser) <br>
		 * and .... to find out which languages are installed
		 */
		function getPreferredLanguage()
		{
			// create a array of languages the user is accepting
			$userLanguages = explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);
			$supportedLanguages = $this->getInstalledLanguages();

			// find usersupported language
			foreach($userLanguages as $key => $value)
			{
				// remove everything behind '-' example: de-de
				$value = trim($value);
				$pieces = explode('-', $value);
				$value = $pieces[0];
				# print 'current lang $value<br>';
				if ($supportedLanguages[$value])
				{
					$retValue=$value;
					break;
				}
			}

			// no usersupported language found -> return english
			if (empty($retValue))
			{
				$retValue='en';
			}

			return $retValue;
		}

		/**
		 * escapes a string for use in searchfilters meant for ldap_search.
		 *
		 * Escaped Characters are: '*', '(', ')', ' ', '\', NUL
		 * It's actually a PHP-Bug, that we have to escape space.
		 * For all other Characters, refer to RFC2254.
		 * 
		 * @deprecated use ldap::quote()
		 * @param $string either a string to be escaped, or an array of values to be escaped
		 * @return string
		 */
		function ldap_addslashes($string='')
		{
			return ldap::quote($string);
		}

		/**
		 * connect to the ldap server and return a handle
		 *
		 * @deprecated use ldap::ldapConnect()
		 * @param $host ldap host
		 * @param $dn ldap_root_dn
		 * @param $passwd ldap_root_pw
		 * @return resource
		 */
		function ldapConnect($host='', $dn='', $passwd='')
		{
			// use Lars new ldap class
			return $GLOBALS['egw']->ldap->ldapConnect($host,$dn,$passwd);
		}

		/**
		 * function to stop running an app
		 *
		 * used to stop running an app in the middle of execution <br>
		 * There may need to be some cleanup before hand
		 * @param $call_footer boolean value to if true then call footer else exit
		 */
		function egw_exit($call_footer = False)
		{
			if (!defined('EGW_EXIT'))
			{
				define('EGW_EXIT',True);

				if ($call_footer)
				{
					$this->egw_footer();
				}
			}
			exit;
		}

		/**
		 * return a random string of size $size
		 *
		 * @param $size int-size of random string to return
		 */
		function randomstring($size)
		{
			$s = '';
			srand((double)microtime()*1000000);
			$random_char = array(
				'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f',
				'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
				'w','x','y','z','A','B','C','D','E','F','G','H','I','J','K','L',
				'M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
			);

			for ($i=0; $i<$size; $i++)
			{
				$s .= $random_char[rand(1,61)];
			}
			return $s;
		}

		// Look at the note towards the top of this file (jengo)
		function filesystem_separator()
		{
			return filesystem_separator();
		}

		/**
		 * This is used for reporting errors in a nice format.
		 *
		 * @param $error - array of errors
		 */
		function error_list($errors,$text='Error')
		{
			if (! is_array($errors))
			{
				return False;
			}

			$html_error = '<table border="0" width="100%"><tr><td align="right"><b>' . lang($text)
				. '</b>: </td><td align="left">' . $errors[0] . '</td></tr>';
			for ($i=1; $i<count($errors); $i++)
			{
				$html_error .= '<tr><td>&nbsp;</td><td align="left">' . $errors[$i] . '</td></tr>';
			}
			return $html_error . '</table>';
		}

		/**
		 * @deprecated use ACL instead
		 */
		function check_owner($record,$link,$label,$extravars = '')
		{
			$this->debug_info[] = 'check_owner() is a depreciated function - use ACL instead';
		}

		/**
		 * return the fullname of a user
		 *
		 * @param $lid='' account loginid
		 * @param $firstname='' firstname
		 * @param $lastname='' lastname
		 * @param $accountid=0 id, to check if it's a user or group, otherwise the lid will be used
		 */
		function display_fullname($lid = '', $firstname = '', $lastname = '',$accountid=0)
		{
			if (! $lid && ! $firstname && ! $lastname)
			{
				$lid       = $GLOBALS['egw_info']['user']['account_lid'];
				$firstname = $GLOBALS['egw_info']['user']['firstname'];
				$lastname  = $GLOBALS['egw_info']['user']['lastname'];
			}
			$is_group = $GLOBALS['egw']->accounts->get_type($accountid ? $accountid : $lid) == 'g';
			
			if (empty($firstname)) $firstname = $lid;
			if (empty($lastname) || $is_group)
			{
				$lastname  = $is_group ? lang('Group') : lang('User');
			}
			$display = $GLOBALS['egw_info']['user']['preferences']['common']['account_display'];

			if ($firstname && $lastname)
			{
				$delimiter = ', ';
			}
			else
			{
				$delimiter = '';
			}
			
			$name = '';
			switch($display)
			{
				case 'firstname':
					$name = $firstname . ' ' . $lastname;
					break;
				case 'lastname':
					$name = $lastname . $delimiter . $firstname;
					break;
				case 'username':
					$name = $lid;
					break;
				case 'firstall':
					$name = $firstname . ' ' . $lastname . ' ['.$lid.']';
					break;
				case 'lastall':
					$name = $lastname . $delimiter . $firstname . ' ['.$lid.']';
					break;
				case 'all':
					/* fall through */
				default:
					$name = '['.$lid.'] ' . $firstname . ' ' . $lastname;
			}
			return $name;
		}

		/**
		 * grab the owner name
		 *
		 * @param $id account id
		 */
		function grab_owner_name($accountid = '')
		{
			$GLOBALS['egw']->accounts->get_account_name($accountid,$lid,$fname,$lname);

			return $this->display_fullname($lid,$fname,$lname,$accountid);
		}

		/**
		 * create tabs
		 *
		 * @param array $tabs an array repersenting the tabs you wish to display, each element
		 * 		 * 		 * 	 in the array is an array of 3 elements, 'label' which is the 
		 * 		 * 		 * 	 text displaed on the tab (you should pass translated string, 
		 * 		 * 		 * 	 create_tabs will not do <code>lang()</code> for you), 'link' 
		 * 		 * 		 * 	 which is the uri, 'target', the frame name or '_blank' to show 
		 * 		 * 		 * 	 page in a new browser window.
		 * @param mixed $selected the tab whos key is $selected will be displayed as current tab
		 * @param $fontsize optional
		 * @return string return html that displays the tabs
		 */
		function create_tabs($tabs, $selected, $fontsize = '')
		{
			$output_text = '<table border="0" cellspacing="0" cellpadding="0"><tr>';

			/* This is a php3 workaround */
			if(EGW_IMAGES_DIR == 'EGW_IMAGES_DIR')
			{
				$ir = ExecMethod('phpgwapi.phpgw.common.get_image_path', 'phpgwapi');
			}
			else
			{
				$ir = EGW_IMAGES_DIR;
			}

			if ($fontsize)
			{
				$fs  = '<font size="' . $fontsize . '">';
				$fse = '</font>';
			}

			$i = 1;
			while ($tab = each($tabs))
			{
				if ($tab[0] == $selected)
				{
					if ($i == 1)
					{
						$output_text .= '<td align="right"><img src="' . $ir . '/tabs-start1.gif"></td>';
					}

					$output_text .= '<td align="left" background="' . $ir . '/tabs-bg1.gif">&nbsp;<b><a href="'
						. $tab[1]['link'] . '" class="tablink" '.$tab[1]['target'].'>' . $fs . $tab[1]['label']
						. $fse . '</a></b>&nbsp;</td>';
					if ($i == count($tabs))
					{
						$output_text .= '<td align="left"><img src="' . $ir . '/tabs-end1.gif"></td>';
					}
					else
					{
						$output_text .= '<td align="left"><img src="' . $ir . '/tabs-sepr.gif"></td>';
					}
				}
				else
				{
					if ($i == 1)
					{
						$output_text .= '<td align="right"><img src="' . $ir . '/tabs-start0.gif"></td>';
					}
					$output_text .= '<td align="left" background="' . $ir . '/tabs-bg0.gif">&nbsp;<b><a href="'
						. $tab[1]['link'] . '" class="tablink" '.$tab[1]['target'].'>' . $fs . $tab[1]['label'] . $fse
						. '</a></b>&nbsp;</td>';
					if (($i + 1) == $selected)
					{
						$output_text .= '<td align="left"><img src="' . $ir . '/tabs-sepl.gif"></td>';
					}
					elseif ($i == $selected || $i != count($tabs))
					{
						$output_text .= '<td align="left"><img src="' . $ir . '/tabs-sepm.gif"></td>';
					}
					elseif ($i == count($tabs))
					{
						if ($i == $selected)
						{
							$output_text .= '<td align="left"><img src="' . $ir . '/tabs-end1.gif"></td>';
						}
						else
						{
							$output_text .= '<td align="left"><img src="' . $ir . '/tabs-end0.gif"></td>';
						}
					}
					else
					{
						if ($i != count($tabs))
						{
							$output_text .= '<td align="left"><img src="' . $ir . '/tabs-sepr.gif"></td>';
						}
					}
				}
				$i++;
				$output_text .= "\n";
			}
			$output_text .= "</table>\n";
			return $output_text;
		}

		/**
		 * get directory of application
		 *
		 * $appname can either be passed or derived from $GLOBALS['egw_info']['flags']['currentapp'];
		 * @param $appname name of application
		 */
		function get_app_dir($appname = '')
		{
			if ($appname == '')
			{
				$appname = $GLOBALS['egw_info']['flags']['currentapp'];
			}
			if ($appname == 'logout' || $appname == 'login')
			{
				$appname = 'phpgwapi';
			}

			$appdir         = EGW_INCLUDE_ROOT . '/'.$appname;
			$appdir_default = EGW_SERVER_ROOT . '/'.$appname;

			if (@is_dir ($appdir))
			{
				return $appdir;
			}
			elseif (@is_dir ($appdir_default))
			{
				return $appdir_default;
			}
			else
			{
				return False;
			}
		}

		/**
		 * get inc (include dir) of application
		 *
		 * $appname can either be passed or derived from $GLOBALS['egw_info']['flags']['currentapp'];
		 * @param $appname name of application
		 */
		function get_inc_dir($appname = '')
		{
			if (! $appname)
			{
				$appname = $GLOBALS['egw_info']['flags']['currentapp'];
			}
			if ($appname == 'logout' || $appname == 'login' || $appname == 'about')
			{
				$appname = 'phpgwapi';
			}

			$incdir         = EGW_INCLUDE_ROOT . '/' . $appname . '/inc';
			$incdir_default = EGW_SERVER_ROOT . '/' . $appname . '/inc';

			if (@is_dir ($incdir))
			{
				return $incdir;
			}
			elseif (@is_dir ($incdir_default))
			{
				return $incdir_default;
			}
			else
			{
				return False;
			}
		}

		/**
		 * list themes available
		 *
		 * themes can either be css file like in HEAD (if the template has a css-dir and has css-files in is) \
		 * 	or ordinary .14 themes-files
		 */
		function list_themes()
		{
			$tpl_dir = $this->get_tpl_dir('phpgwapi');

			if ($dh = @opendir($tpl_dir . SEP . 'css'))
			{
				while ($file = readdir($dh))
				{
					if (eregi("\.css$", $file) && $file != 'phpgw.css')
					{
						$list[] = substr($file,0,strpos($file,'.'));
					}
				}
			}
			if(!is_array($list))
			{
				$dh = opendir(EGW_SERVER_ROOT . '/phpgwapi/themes');
				while ($file = readdir($dh))
				{
					if (eregi("\.theme$", $file))
					{
						$list[] = substr($file,0,strpos($file,'.'));
					}
				}
			}
			closedir($dh);
			reset ($list);
			return $list;
		}

		/**
		* List available templates
		*
		* @returns array alphabetically sorted list of templates
		*/
		function list_templates()
		{
			$list = array();
			$d = dir(EGW_SERVER_ROOT . '/phpgwapi/templates');
			while (($entry=$d->read()))
			{
				if ($entry != '..' && file_exists(EGW_SERVER_ROOT . '/phpgwapi/templates/' . $entry .'/class.'.$entry.'_framework.inc.php'))
				{
					$list[$entry]['name'] = $entry;
					if (file_exists ($f = EGW_SERVER_ROOT . '/phpgwapi/templates/' . $entry . '/setup/setup.inc.php'))
					{
						include($f);
						$list[$entry]['title'] = $GLOBALS['egw_info']['template'][$entry]['title'];
					}
					else
					{
						$list[$entry]['title'] = $entry;
					}
				}
			}
			$d->close();
			ksort($list);

			return $list;
		}

		/**
		 * get template dir of an application
		 *
		 * @param $appname appication name optional can be derived from $GLOBALS['egw_info']['flags']['currentapp'];
		 * @static 
		 * @return string/boolean dir or false if no dir is found
		 */
		function get_tpl_dir($appname = '')
		{
			if (!$appname)
			{
				$appname = $GLOBALS['egw_info']['flags']['currentapp'];
			}
			if ($appname == 'logout' || $appname == 'login')
			{
				$appname = 'phpgwapi';
			}

			if (!isset($GLOBALS['egw_info']['server']['template_set']) && isset($GLOBALS['egw_info']['user']['preferences']['common']['template_set']))
			{
				$GLOBALS['egw_info']['server']['template_set'] = $GLOBALS['egw_info']['user']['preferences']['common']['template_set'];
			}

			// Setting this for display of template choices in user preferences
			if ($GLOBALS['egw_info']['server']['template_set'] == 'user_choice')
			{
				$GLOBALS['egw_info']['server']['usrtplchoice'] = 'user_choice';
			}

			if (($GLOBALS['egw_info']['server']['template_set'] == 'user_choice' ||
				!isset($GLOBALS['egw_info']['server']['template_set'])) &&
				isset($GLOBALS['egw_info']['user']['preferences']['common']['template_set']))
			{
				$GLOBALS['egw_info']['server']['template_set'] = $GLOBALS['egw_info']['user']['preferences']['common']['template_set'];
			}
			if (!file_exists(EGW_SERVER_ROOT.'/phpgwapi/templates/'.$GLOBALS['egw_info']['server']['template_set'].'/class.'.
				$GLOBALS['egw_info']['server']['template_set'].'_framework.inc.php'))
			{
				$GLOBALS['egw_info']['server']['template_set'] = 'idots';
			}
			$tpldir         = EGW_SERVER_ROOT . '/' . $appname . '/templates/' . $GLOBALS['egw_info']['server']['template_set'];
			$tpldir_default = EGW_SERVER_ROOT . '/' . $appname . '/templates/default';

			if (@is_dir($tpldir))
			{
				return $tpldir;
			}
			elseif (@is_dir($tpldir_default))
			{
				return $tpldir_default;
			}
			else
			{
				return False;
			}
		}

		/**
		 * checks if image_dir exists and has more than just a navbar-icon
		 *
		 * this is just a workaround for idots, better to use find_image, which has a fallback \
		 * 	on a per image basis to the default dir
		 */
		function is_image_dir($dir)
		{
			if (!@is_dir($dir))
			{
				return False;
			}
			if ($d = opendir($dir))
			{
				while ($f = readdir($d))
				{
					$ext = strtolower(strrchr($f,'.'));
					if (($ext == '.gif' || $ext == '.png') && strpos($f,'navbar') === False)
					{
						return True;
					}
				}
			}
			return False;
		}

		/**
		 * get image dir of an application
		 *
		 * @param $appname application name optional can be derived from $GLOBALS['egw_info']['flags']['currentapp'];
		 */
		function get_image_dir($appname = '')
		{
			if ($appname == '')
			{
				$appname = $GLOBALS['egw_info']['flags']['currentapp'];
			}
			if (empty($GLOBALS['egw_info']['server']['template_set']))
			{
				$GLOBALS['egw_info']['server']['template_set'] = 'idots';
			}

			$imagedir            = EGW_SERVER_ROOT . '/' . $appname . '/templates/'
				. $GLOBALS['egw_info']['server']['template_set'] . '/images';
			$imagedir_default    = EGW_SERVER_ROOT . '/' . $appname . '/templates/idots/images';
			$imagedir_olddefault = EGW_SERVER_ROOT . '/' . $appname . '/images';

			if ($this->is_image_dir ($imagedir))
			{
				return $imagedir;
			}
			elseif ($this->is_image_dir ($imagedir_default))
			{
				return $imagedir_default;
			}
			elseif ($this->is_image_dir ($imagedir_olddefault))
			{
				return $imagedir_olddefault;
			}
			else
			{
				return False;
			}
		}

		/**
		 * get image path of an application
		 *
		 * @param $appname appication name optional can be derived from $GLOBALS['egw_info']['flags']['currentapp'];
		 */
		function get_image_path($appname = '')
		{
			if ($appname == '')
			{
				$appname = $GLOBALS['egw_info']['flags']['currentapp'];
			}

			if (empty($GLOBALS['egw_info']['server']['template_set']))
			{
				$GLOBALS['egw_info']['server']['template_set'] = 'idots';
			}

			$imagedir            = EGW_SERVER_ROOT . '/'.$appname.'/templates/'.$GLOBALS['egw_info']['server']['template_set'].'/images';
			$imagedir_default    = EGW_SERVER_ROOT . '/'.$appname.'/templates/idots/images';
			$imagedir_olddefault = EGW_SERVER_ROOT . '/'.$appname.'/templates/default/images';

			if ($this->is_image_dir ($imagedir))
			{
				return $GLOBALS['egw_info']['server']['webserver_url'].'/'.$appname.'/templates/'.$GLOBALS['egw_info']['server']['template_set'].'/images';
			}
			elseif ($this->is_image_dir ($imagedir_default))
			{
				return $GLOBALS['egw_info']['server']['webserver_url'].'/'.$appname.'/templates/idots/images';
			}
			elseif ($this->is_image_dir ($imagedir_olddefault))
			{
				return $GLOBALS['egw_info']['server']['webserver_url'].'/'.$appname.'/templates/default/images';
			}
			else
			{
				return False;
			}
		}

		/**
		 * Searches and image by a given search order (it maintains a cache of the existing images):
		 * - image dir of the application for the given template
		 * - image dir of the application for the default template
		 * - image dir of the API for the given template
		 * - image dir of the API for the default template
		 *
		 * @param string $appname
		 * @param string $image
		 * @return string url of the image
		 */
		function find_image($appname,$image)
		{
			$imagedir = '/'.$appname.'/templates/'.$GLOBALS['egw_info']['user']['preferences']['common']['template_set'].'/images';
			
			if (!@is_array($this->found_files[$appname]))
			{
				$imagedir_olddefault = '/'.$appname.'/templates/default/images';
				$imagedir_default    = '/'.$appname.'/templates/idots/images';
				
				if (@is_dir(EGW_INCLUDE_ROOT.$imagedir_olddefault))
				{
					$d = dir(EGW_INCLUDE_ROOT.$imagedir_olddefault);
					while (false != ($entry = $d->read()))
					{
						if ($entry != '.' && $entry != '..')
						{
							$this->found_files[$appname][$entry] = $imagedir_olddefault;
						}
					}
					$d->close();
				}

				if (@is_dir(EGW_INCLUDE_ROOT.$imagedir_default))
				{
					$d = dir(EGW_INCLUDE_ROOT.$imagedir_default);
					while (false != ($entry = $d->read()))
					{
						if ($entry != '.' && $entry != '..')
						{
							$this->found_files[$appname][$entry] = $imagedir_default;
						}
					}
					$d->close();
				}

				if (@is_dir(EGW_INCLUDE_ROOT.$imagedir))
				{
					$d = dir(EGW_INCLUDE_ROOT.$imagedir);
					while (false != ($entry = $d->read()))
					{
						if ($entry != '.' && $entry != '..')
						{
							$this->found_files[$appname][$entry] = $imagedir;
						}
					}
					$d->close();
				}
			}
			
			if (!$GLOBALS['egw_info']['server']['image_type'])
			{
				// priority: GIF->JPG->PNG
				$img_type=array('.gif','.jpg','.png');
			}
			else
			{
				// priority: : PNG->JPG->GIF
				$img_type=array('.png','.jpg','.gif');
			}

			// first look in the selected template dir
			if(@$this->found_files[$appname][$image.$img_type[0]]==$imagedir)
			{
				$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files[$appname][$image.$img_type[0]].'/'.$image.$img_type[0];
			}
			elseif(@$this->found_files[$appname][$image.$img_type[1]]==$imagedir)
			{
				$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files[$appname][$image.$img_type[1]].'/'.$image.$img_type[1];
			}
			elseif(@$this->found_files[$appname][$image.$img_type[2]]==$imagedir)
			{
				$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files[$appname][$image.$img_type[2]].'/'.$image.$img_type[2];
			}
			// then look everywhere else
			elseif(isset($this->found_files[$appname][$image.$img_type[0]]))
			{
				$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files[$appname][$image.$img_type[0]].'/'.$image.$img_type[0];
			}
			elseif(isset($this->found_files[$appname][$image.$img_type[1]]))
			{
				$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files[$appname][$image.$img_type[1]].'/'.$image.$img_type[1];
			}
			elseif(isset($this->found_files[$appname][$image.$img_type[2]]))
			{
				$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files[$appname][$image.$img_type[2]].'/'.$image.$img_type[2];
			}
			elseif(isset($this->found_files[$appname][$image]))
			{
				$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files[$appname][$image].'/'.$image;
			}
			else
			{
				// searching the image in the api-dirs
				if (!isset($this->found_files['phpgwapi']))
				{
					$this->find_image('phpgwapi','');
				}

				if(isset($this->found_files['phpgwapi'][$image.$img_type[0]]))
				{
					$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files['phpgwapi'][$image.$img_type[0]].'/'.$image.$img_type[0];
				}
				elseif(isset($this->found_files['phpgwapi'][$image.$img_type[1]]))
				{
					$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files['phpgwapi'][$image.$img_type[1]].'/'.$image.$img_type[1];
				}
				elseif(isset($this->found_files['phpgwapi'][$image.$img_type[2]]))
				{
					$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files['phpgwapi'][$image.$img_type[2]].'/'.$image.$img_type[2];
				}
				elseif(isset($this->found_files['phpgwapi'][$image]))
				{
					$imgfile = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files['phpgwapi'][$image].'/'.$image;
				}
				else
				{
					$imgfile = '';
				}
			}
			return $imgfile;
		}

		/**
		 * Searches a appname, template and maybe language and type-specific image
		 *
		 * @param string $appname
		 * @param string $image
		 * @param string $ext
		 * @param boolean $use_lang
		 * @return string url of the image
		 */
		function image($appname,$image='',$ext='',$use_lang=True)
		{
			if (!is_array($image))
			{
				if (empty($image))
				{
					return '';
				}
				$image = array($image);
			}
			if ($use_lang)
			{
				while (list(,$img) = each($image))
				{
					$lang_images[] = $img . '_' . $GLOBALS['egw_info']['user']['preferences']['common']['lang'];
					$lang_images[] = $img;
				}
				$image = $lang_images;
			}
			while (empty($image_found) && list(,$img) = each($image))
			{
				if(isset($this->found_files[$appname][$img.$ext]))
				{
					$image_found = $GLOBALS['egw_info']['server']['webserver_url'].$this->found_files[$appname][$img.$ext].'/'.$img.$ext;
				}
				else
				{
					$image_found = $this->find_image($appname,$img.$ext);
				}
			}
			return $image_found;
		}

		/**
		 * Searches an image of a given type, if not found also without type/extension
		 *
		 * @param string $appname
		 * @param string $image
		 * @param string $extension
		 * @return string url of the image
		 */
		function image_on($appname,$image,$extension='_on')
		{
			if (($with_extension = $this->image($appname,$image,$extension)))
			{
				return $with_extension;
			}
			if(($without_extension = $this->image($appname,$image)))
			{
				return $without_extension;
			}
			return '';
		}

		/**
	 	 * prepare an array with variables used to render the navbar
		 * 
		 * @deprecated inherit from egw_framework class in your template and use egw_framework::_navbar_vars()
		 */
		function navbar()
		{
			$GLOBALS['egw_info']['navbar'] = $GLOBALS['egw']->framework->_get_navbar_vars();
		}

		/**
		 * load header.inc.php for an application
		 *
		 * @deprecated 
		 */
		function app_header()
		{
			if (file_exists(EGW_APP_INC . '/header.inc.php'))
			{
				include(EGW_APP_INC . '/header.inc.php');
			}
		}

		/**
		 * load the eGW header
		 *
		 * @deprecated use egw_framework::header(), $GLOBALS['egw']->framework->navbar() or better egw_framework::render($content)
		 */
		function egw_header()
		{
			echo $GLOBALS['egw']->framework->header();
			
			if (!$GLOBALS['egw_info']['flags']['nonavbar'])
			{
			   echo $GLOBALS['egw']->framework->navbar();
			}
		 }

		/**
		 * load the eGW footer
		 *
		 * @deprecated use egw_framework::footer() or egw_framework::render($content)
		 */
		function egw_footer()
		{
			if(is_object($GLOBALS['egw']->framework)) {
				echo $GLOBALS['egw']->framework->footer();
			}
		}

		/**
		* Used by template headers for including CSS in the header
		*
		* @deprecated use framework::_get_css()
		* @return string
		*/
		function get_css()
		{
			return $GLOBALS['egw']->framework->_get_css();
		}

		/**
		* Used by the template headers for including javascript in the header
		*
		* @deprecated use framework::_get_js()
		* @return string the javascript to be included
		*/
		function get_java_script()
		{
			return $GLOBALS['egw']->framework->_get_js();
		}

		/**
		* Returns on(Un)Load attributes from js class
		*
		* @deprecated use framework::_get_js()
		* @returns string body attributes
		*/
		function get_body_attribs()
		{
			return $GLOBALS['egw']->framework->_get_body_attribs();
		}

		function hex2bin($data)
		{
			$len = strlen($data);
			return @pack('H' . $len, $data);
		}

		/**
		 * encrypt data passed to the function
		 *
		 * @param $data data (string?) to be encrypted
		 */
		function encrypt($data)
		{
			return $GLOBALS['egw']->crypto->encrypt($data);
		}

		/**
		 * decrypt $data
		 *
		 * @param $data data to be decrypted
		 */
		function decrypt($data)
		{
			return $GLOBALS['egw']->crypto->decrypt($data);
		}

		/**
		 * legacy wrapper for newer auth class function, encrypt_password
		 *
		 * uses the encryption type set in setup and calls the appropriate encryption functions
		 *
		 * @deprecated use auth::encrypt_password()
		 * @param $password password to encrypt
		 */
		function encrypt_password($password,$sql=False)
		{
			return auth::encrypt_password($password,$sql);
		}

		/**
		 * find the current position of the app is the users portal_order preference
		 *
		 * @param $app application id to find current position - required
		 * No discussion
		 */
		function find_portal_order($app)
		{
			if(!is_array($GLOBALS['egw_info']['user']['preferences']['portal_order']))
			{
				return -1;
			}
			@reset($GLOBALS['egw_info']['user']['preferences']['portal_order']);
			while(list($seq,$appid) = each($GLOBALS['egw_info']['user']['preferences']['portal_order']))
			{
				if($appid == $app)
				{
					@reset($GLOBALS['egw_info']['user']['preferences']['portal_order']);
					return $seq;
				}
			}
			@reset($GLOBALS['egw_info']['user']['preferences']['portal_order']);
			return -1;
		}

		/**
		 * temp wrapper to new hooks class
		 *
		 */
		function hook($location, $appname = '', $no_permission_check = False)
		{
			echo '$'."GLOBALS['phpgw']common->hook()".' has been replaced. Please change to the new $'."GLOBALS['phpgw']hooks->process()".'. For now this will act as a wrapper<br>';
			return $GLOBALS['egw']->hooks->process($location, $order, $no_permission_check);
		}

		/**
		 * temp wrapper to new hooks class
		 *
		 */
		// Note: $no_permission_check should *ONLY* be used when it *HAS* to be. (jengo)
		function hook_single($location, $appname = '', $no_permission_check = False)
		{
			echo '$'."GLOBALS['phpgw']common->hook_single()".' has been replaced. Please change to the new $'."GLOBALS['phpgw']hooks->single()".'. For now this will act as a wrapper<br>';
			return $GLOBALS['egw']->hooks->single($location, $order, $no_permission_check);
		}

		/**
		 * temp wrapper to new hooks class
		 *
		 */
		function hook_count($location)
		{
			echo '$'."GLOBALS['phpgw']common->hook_count()".' has been replaced. Please change to the new $'."GLOBALS['phpgw']hooks->count()".'. For now this will act as a wrapper<br>';
			return $GLOBALS['egw']->hooks->count($location);
		}

		/* Wrapper to the session->appsession() */
		function appsession($data = '##NOTHING##')
		{
			$this->debug_info[] = "\$GLOBALS['egw']->common->appsession() is a depreciated function"
				. " - use \$GLOBALS['egw']->session->appsession() instead";

			return $GLOBALS['egw']->session->appsession('default','',$data);
		}

		/**
		 * return a formatted timestamp or current time
		 *
		 * @param int $t=0 timestamp, default current time
		 * @param string $format='' timeformat, default '' = read from the user prefernces
		 * @param boolean $adjust_to_usertime=true should datetime::tz_offset be added to $t or not, default true
		 * @return string the formated date/time
		 */
		function show_date($t = 0, $format = '', $adjust_to_usertime=true)
		{
			if (!$t)
			{
				$t = $GLOBALS['egw']->datetime->gmtnow;
			}

			if ($adjust_to_usertime)
			{
				$t += $GLOBALS['egw']->datetime->tz_offset;
			}

			if (!$format)
			{
				$format = $GLOBALS['egw_info']['user']['preferences']['common']['dateformat'] . ' - ';
				if ($GLOBALS['egw_info']['user']['preferences']['common']['timeformat'] == '12')
				{
					$format .= 'h:i a';
				}
				else
				{
					$format .= 'H:i';
				}
			}
			return adodb_date($format,$t);
		}

		/**
		 * Format a date according to the user preferences
		 *
		 * @param string $yearstr year
		 * @param string $monthstr month
		 * @param string $day day
		 * @param boolean $add_seperator=false add the separator specifed in the prefs or not, default no
		 * @return string
		 */
		function dateformatorder($yearstr,$monthstr,$daystr,$add_seperator = False)
		{
			$dateformat = strtolower($GLOBALS['egw_info']['user']['preferences']['common']['dateformat']);
			$sep = substr($GLOBALS['egw_info']['user']['preferences']['common']['dateformat'],1,1);

			$dlarr[strpos($dateformat,'y')] = $yearstr;
			$dlarr[strpos($dateformat,'m')] = $monthstr;
			$dlarr[strpos($dateformat,'d')] = $daystr;
			ksort($dlarr);

			if ($add_seperator)
			{
				return implode($sep,$dlarr);
			}
			return implode(' ',$dlarr);
		}

		/**
		 * format the time takes settings from user preferences
		 *
		 * @param int $hour hour
		 * @param int $min minutes
		 * @param int/string $sec='' defaults to ''
		 * @return string formated time
		 */
		function formattime($hour,$min,$sec='')
		{
			$h12 = $hour;
			if ($GLOBALS['egw_info']['user']['preferences']['common']['timeformat'] == '12')
			{
				if ($hour >= 12)
				{
					$ampm = ' pm';
				}
				else
				{
					$ampm = ' am';
				}

				$h12 %= 12;

				if ($h12 == 0 && $hour)
				{
					$h12 = 12;
				}
				if ($h12 == 0 && !$hour)
				{
					$h12 = 0;
				}
			}
			else
			{
				$h12 = $hour;
			}

			if ($sec !== '')
			{
				$sec = ':'.$sec;
			}

			return $h12.':'.$min.$sec.$ampm;
		}
		
		/**
		 * Format an email address according to the system standard
		 *
		 * Convert all european special chars to ascii and fallback to the accountname, if nothing left eg. chiniese
		 *
		 * @param string $first firstname
		 * @param string $last lastname
		 * @param string $account account-name (lid)
		 * @param string $domain=null domain-name or null to use eGW's default domain $GLOBALS['egw_info']['server']['mail_suffix]
		 * @return string with email address
		 */
		function email_address($first,$last,$account,$domain=null)
		{
			//echo "<p align=right>common::email_address('$first','$last','$account')";
			// convert all european special chars to ascii, (c) RalfBecker-AT-egroupware.org ;-)
			static $extra = array(
				'&szlig;' => 'ss',
				' ' => '',
			);
			foreach (array('first','last','account') as $name) 
			{
				$$name = htmlentities($$name,ENT_QUOTES,$GLOBALS['egw']->translation->charset());
				$$name = str_replace(array_keys($extra),array_values($extra),$$name);
				$$name = preg_replace('/&([aAuUoO])uml;/','\\1e',$$name);	// replace german umlauts with the letter plus one 'e'
				$$name = preg_replace('/&([a-zA-Z])(grave|acute|circ|ring|cedil|tilde|slash|uml);/','\\1',$$name);	// remove all types of acents
				$$name = preg_replace('/&([a-zA-Z]+|#[0-9]+|);/','',$$name);	// remove all other entities
			}
			//echo " --> ('$first', '$last', '$account')";
			if (!$first && !$last)	// fallback to the account-name, if real names contain only special chars
			{
				$first = '';
				$last = $account;
			}
			if (!$first || !$last)
			{
				$dot = $underscore = '';
			}
			else
			{
				$dot = '.';
				$underscore = '_';
			}
			if (!$domain) $domain = $GLOBALS['egw_info']['server']['mail_suffix'];

			$email = str_replace(array('first','last','initial','account','dot','underscore','-'),
				array($first,$last,substr($first,0,1),$account,$dot,$underscore,''),
				$GLOBALS['egw_info']['server']['email_address_format'] ? $GLOBALS['egw_info']['server']['email_address_format'] : 'first-dot-last').
				'@'.$domain;
			//echo " = '$email'</p>\n";
			return $email;
		}			

		// This is not the best place for it, but it needs to be shared bewteen Aeromail and SM
		/**
		 * uses code in /email class msg to obtain the appropriate password for email
		 *
		 * @param  (none - it will abtain the info it needs on its own)
		 */
		/*
		function get_email_passwd_ex()
		{
			// ----  Create the email Message Class  if needed  -----
			if (is_object($GLOBALS['egw']->msg))
			{
				$do_free_me = False;
			}
			else
			{
				$GLOBALS['egw']->msg =& CreateObject('email.mail_msg');
				$do_free_me = True;
			}
			// use the Msg class to obtain the appropriate password
			$tmp_prefs = $GLOBALS['egw']->preferences->read();
			if (!isset($tmp_prefs['email']['passwd']))
			{
				$email_passwd = $GLOBALS['egw_info']['user']['passwd'];
			}
			else
			{
				$email_passwd = $GLOBALS['egw']->msg->decrypt_email_passwd($tmp_prefs['email']['passwd']);
			}
			// cleanup and return
			if ($do_free_me)
			{
				unset ($GLOBALS['egw']->msg);
			}
			return $email_passwd;
		}
		*/

		// This is not the best place for it, but it needs to be shared bewteen Aeromail and SM
		/**
		 * create email preferences
		 *
		 * This is not the best place for it, but it needs to be shared between Aeromail and SM
		 * @param $prefs
		 * @param $account_id -optional defaults to : phpgw_info['user']['account_id']
		 */
		function create_emailpreferences($prefs='',$accountid='')
		{
			return $GLOBALS['egw']->preferences->create_email_preferences($accountid);
			// ----  Create the email Message Class  if needed  -----
			if (is_object($GLOBALS['egw']->msg))
			{
				$do_free_me = False;
			}
			else
			{
				$GLOBALS['egw']->msg =& CreateObject('email.mail_msg');
				$do_free_me = True;
			}

			// this sets the preferences into the phpgw_info structure
			$GLOBALS['egw']->msg->create_email_preferences();

			// cleanup and return
			if ($do_free_me)
			{
				unset ($GLOBALS['egw']->msg);
			}
		}

		/*
		function create_emailpreferences($prefs,$accountid='')
		{
			$account_id = get_account_id($accountid);

			// NEW EMAIL PASSWD METHOD (shared between SM and aeromail)
			$prefs['email']['passwd'] = $this->get_email_passwd_ex();

			// Add default preferences info
			if (!isset($prefs['email']['userid']))
			{
				if ($GLOBALS['egw_info']['server']['mail_login_type'] == 'vmailmgr')
				{
					$prefs['email']['userid'] = $GLOBALS['egw']->accounts->id2name($account_id)
						. '@' . $GLOBALS['egw_info']['server']['mail_suffix'];
				}
				else
				{
					$prefs['email']['userid'] = $GLOBALS['egw']->accounts->id2name($account_id);
				}
			}
			// Set Server Mail Type if not defined
			if (empty($GLOBALS['egw_info']['server']['mail_server_type']))
			{
				$GLOBALS['egw_info']['server']['mail_server_type'] = 'imap';
			}

			// OLD EMAIL PASSWD METHOD
			if (!isset($prefs['email']['passwd']))
			{
				$prefs['email']['passwd'] = $GLOBALS['egw_info']['user']['passwd'];
			}
			else
			{
				$prefs['email']['passwd'] = $this->decrypt($prefs['email']['passwd']);
			}
			// NEW EMAIL PASSWD METHOD Located at the begining of this function

			if (!isset($prefs['email']['address']))
			{
				$prefs['email']['address'] = $GLOBALS['egw']->accounts->id2name($account_id)
					. '@' . $GLOBALS['egw_info']['server']['mail_suffix'];
			}
			if (!isset($prefs['email']['mail_server']))
			{
				$prefs['email']['mail_server'] = $GLOBALS['egw_info']['server']['mail_server'];
			}
			if (!isset($prefs['email']['mail_server_type']))
			{
				$prefs['email']['mail_server_type'] = $GLOBALS['egw_info']['server']['mail_server_type'];
			}
			if (!isset($prefs['email']['imap_server_type']))
			{
				$prefs['email']['imap_server_type'] = $GLOBALS['egw_info']['server']['imap_server_type'];
			}
			// These sets the mail_port server variable
			if ($prefs['email']['mail_server_type']=='imap')
			{
				$prefs['email']['mail_port'] = '143';
			}
			elseif ($prefs['email']['mail_server_type']=='pop3')
			{
				$prefs['email']['mail_port'] = '110';
			}
			elseif ($prefs['email']['mail_server_type']=='imaps')
			{
				$prefs['email']['mail_port'] = '993';
			}
			elseif ($prefs['email']['mail_server_type']=='pop3s')
			{
				$prefs['email']['mail_port'] = '995';
			}
			// This is going to be used to switch to the nntp class
			if (isset($GLOBALS['egw_info']['flags']['newsmode']) &&
				$GLOBALS['egw_info']['flags']['newsmode'])
			{
				$prefs['email']['mail_server_type'] = 'nntp';
			}
			// DEBUG
			//echo "<br>prefs['email']['passwd']: " .$prefs['email']['passwd'] .'<br>';
			return $prefs;
		}
		*/

		// This will be moved into the applications area.
		/**
		 * ?
		 *
		 * This will be moved into the applications area
		 */
		function check_code($code)
		{
			$s = '<br>';
			switch ($code)
			{
				case 13:	$s .= lang('Your message has been sent');break;
				case 14:	$s .= lang('New entry added sucessfully');break;
				case 15:	$s .= lang('Entry updated sucessfully');	break;
				case 16:	$s .= lang('Entry has been deleted sucessfully'); break;
				case 18:	$s .= lang('Password has been updated');	break;
				case 38:	$s .= lang('Password could not be changed');	break;
				case 19:	$s .= lang('Session has been killed');	break;
				case 27:	$s .= lang('Account has been updated');	break;
				case 28:	$s .= lang('Account has been created');	break;
				case 29:	$s .= lang('Account has been deleted');	break;
				case 30:	$s .= lang('Your settings have been updated'); break;
				case 31:	$s .= lang('Group has been added');	break;
				case 32:	$s .= lang('Group has been deleted');	break;
				case 33:	$s .= lang('Group has been updated');	break;
				case 34:	$s .= lang('Account has been deleted') . '<p>'
						. lang('Error deleting %1 %2 directory',lang('users'),' '.lang('private').' ')
						. ',<br>' . lang('Please %1 by hand',lang('delete')) . '<br><br>'
						. lang('To correct this error for the future you will need to properly set the')
						. '<br>' . lang('permissions to the files/users directory')
						. '<br>' . lang('On *nix systems please type: %1','chmod 770 '
						. $GLOBALS['egw_info']['server']['files_dir'] . '/users/');
					break;
				case 35:	$s .= lang('Account has been updated') . '<p>'
						. lang('Error renaming %1 %2 directory',lang('users'),
						' '.lang('private').' ')
						. ',<br>' . lang('Please %1 by hand',
						lang('rename')) . '<br><br>'
						. lang('To correct this error for the future you will need to properly set the')
						. '<br>' . lang('permissions to the files/users directory')
						. '<br>' . lang('On *nix systems please type: %1','chmod 770 '
						. $GLOBALS['egw_info']['server']['files_dir'] . '/users/');
					break;
				case 36:	$s .= lang('Account has been created') . '<p>'
						. lang('Error creating %1 %2 directory',lang('users'),
						' '.lang('private').' ')
						. ',<br>' . lang('Please %1 by hand',
						lang('create')) . '<br><br>'
						. lang('To correct this error for the future you will need to properly set the')
						. '<br>' . lang('permissions to the files/users directory')
						. '<br>' . lang('On *nix systems please type: %1','chmod 770 '
						. $GLOBALS['egw_info']['server']['files_dir'] . '/users/');
					break;
				case 37:	$s .= lang('Group has been added') . '<p>'
						. lang('Error creating %1 %2 directory',lang('groups'),' ')
						. ',<br>' . lang('Please %1 by hand',
						lang('create')) . '<br><br>'
						. lang('To correct this error for the future you will need to properly set the')
						. '<br>' . lang('permissions to the files/users directory')
						. '<br>' . lang('On *nix systems please type: %1','chmod 770 '
						. $GLOBALS['egw_info']['server']['files_dir'] . '/groups/');
					break;
				case 38:	$s .= lang('Group has been deleted') . '<p>'
						. lang('Error deleting %1 %2 directory',lang('groups'),' ')
						. ',<br>' . lang('Please %1 by hand',
						lang('delete')) . '<br><br>'
						. lang('To correct this error for the future you will need to properly set the')
						. '<br>' . lang('permissions to the files/users directory')
						. '<br>' . lang('On *nix systems please type: %1','chmod 770 '
						. $GLOBALS['egw_info']['server']['files_dir'] . '/groups/');
					break;
				case 39:	$s .= lang('Group has been updated') . '<p>'
						. lang('Error renaming %1 %2 directory',lang('groups'),' ')
						. ',<br>' . lang('Please %1 by hand',
						lang('rename')) . '<br><br>'
						. lang('To correct this error for the future you will need to properly set the')
						. '<br>' . lang('permissions to the files/users directory')
						. '<br>' . lang('On *nix systems please type: %1','chmod 770 '
						. $GLOBALS['egw_info']['server']['files_dir'] . '/groups/');
					break;
				case 40: $s .= lang('You have not entered a title').'.';
					break;
				case 41: $s .= lang('You have not entered a valid time of day').'.';
					break;
				case 42: $s .= lang('You have not entered a valid date').'.';
					break;
				case 43: $s .= lang('You have not entered participants').'.';
					break;
				default:	return '';
			}
			return $s;
		}
		/**
		 * process error message
		 *
		 * @param $error error
		 * @param $line line
		 * @param $file file
		 */
		function phpgw_error($error,$line = '', $file = '')
		{
			echo '<p><b>eGroupWare internal error:</b><p>'.$error;
			if ($line)
			{
				echo 'Line: '.$line;
			}
			if ($file)
			{
				echo 'File: '.$file;
			}
			echo '<p>Your session has been halted.';
			exit;
		}

		/**
		 * create phpcode from array
		 *
		 * @param $array - array
		 */
		function create_phpcode_from_array($array)
		{
			while (list($key, $val) = each($array))
			{
				if (is_array($val))
				{
					while (list($key2, $val2) = each($val))
					{
						if (is_array($val2))
						{
							while (list($key3, $val3) = each ($val2))
							{
								if (is_array($val3))
								{
									while (list($key4, $val4) = each ($val3))
									{
										$s .= "\$GLOBALS['egw_info']['" . $key . "']['" . $key2 . "']['" . $key3 . "']['" .$key4 . "']='" . $val4 . "';";
										$s .= "\n";
									}
								}
								else
								{
									$s .= "\$GLOBALS['egw_info']['" . $key . "']['" . $key2 . "']['" . $key3 . "']='" . $val3 . "';";
									$s .= "\n";
								}
							}
						}
						else
						{
							$s .= "\$GLOBALS['egw_info']['" . $key ."']['" . $key2 . "']='" . $val2 . "';";
							$s .= "\n";
						}
					}
				}
				else
				{
					$s .= "\$GLOBALS['egw_info']['" . $key . "']='" . $val . "';";
					$s .= "\n";
				}
			}
			return $s;
		}

		// This will return the full phpgw_info array, used for debugging
		/**
		 * return the full phpgw_info array for debugging
		 *
		 * @param array - array
		 */
		function debug_list_array_contents($array)
		{
			while (list($key, $val) = each($array))
			{
				if (is_array($val))
				{
					while (list($key2, $val2) = each($val))
					{
						if (is_array($val2))
						{
							while (list($key3, $val3) = each ($val2))
							{
								if (is_array($val3))
								{
									while (list($key4, $val4) = each ($val3))
									{
										echo $$array . "[$key][$key2][$key3][$key4]=$val4<br>";
									}
								}
								else
								{
									echo $$array . "[$key][$key2][$key3]=$val3<br>";
								}
							}
						}
						else
						{
							echo $$array . "[$key][$key2]=$val2<br>";
						}
					}
				}
				else
				{
					echo $$array . "[$key]=$val<br>";
				}
			}
		}

		// This will return a list of functions in the API
		/**
		 * return a list of functionsin the API
		 *
		 */
		function debug_list_core_functions()
		{
			echo '<br><b>core functions</b><br>';
			echo '<pre>';
			chdir(EGW_INCLUDE_ROOT . '/phpgwapi');
			system("grep -r '^[ \t]*function' *");
			echo '</pre>';
		}
		
		var $nextid_table = 'egw_nextid';

		/**
		 * Return a value for the next id an app/class may need to insert values into LDAP
		 *
		 * @param string $appname app-name
		 * @param int $min=0 if != 0 minimum id
		 * @param int $max=0 if != 0 maximum id allowed, if it would be exceeded we return false
		 * @return int/boolean the next id or false if $max given and exceeded
		 */
		function next_id($appname,$min=0,$max=0)
		{
			if (!$appname)
			{
				return -1;
			}

			$GLOBALS['egw']->db->select($this->nextid_table,'id',array('appname' => $appname),__LINE__,__FILE__);
			$id = $GLOBALS['egw']->db->next_record() ? $GLOBALS['egw']->db->f('id') : 0;

			if ($max && $id >= $max)
			{
				return False;
			}
			++$id;
			
			if($id < $min) $id = $min;

			$GLOBALS['egw']->db->insert($this->nextid_table,array('id' => $id),array('appname' => $appname),__LINE__,__FILE__);

			return (int)$id;
		}

		/**
		 * Return a value for the last id entered, which an app may need to check values for LDAP
		 *
		 * @param string $appname app-name
		 * @param int $min=0 if != 0 minimum id
		 * @param int $max=0 if != 0 maximum id allowed, if it would be exceeded we return false
		 * @return int current id in the next_id table for a particular app/class or -1 for no app and false if $max is exceeded.
		 */
		function last_id($appname,$min=0,$max=0)
		{
			if (!$appname)
			{
				return -1;
			}

			$GLOBALS['egw']->db->select($this->nextid_table,'id',array('appname' => $appname),__LINE__,__FILE__);
			$id = $GLOBALS['egw']->db->next_record() ? $GLOBALS['egw']->db->f('id') : 0;

			if (!$id || $id < $min)
			{
				return $this->next_id($appname,$min,$max);
			}
			if ($max && $id > $max)
			{
				return False;
			}
			return (int)$id;
		}
		
		/**
		 * gets an eGW conformat referer from $_SERVER['HTTP_REFERER'], suitable for direct use in the link function
		 *
		 * @param string $default='' default to use if referer is not set by webserver or not determinable
		 * @param string $referer='' referer string to use, default ('') use $_SERVER['HTTP_REFERER']
		 * @return string
		 */
		function get_referer($default='',$referer='')
		{
			if (!$referer) $referer = $_SERVER['HTTP_REFERER'];
			
			$webserver_url = $GLOBALS['egw_info']['server']['webserver_url'];
			if (empty($webserver_url) || $webserver_url{0} == '/')	// url is just a path
			{
				$referer = preg_replace('/^https?:\/\/[^\/]+/','',$referer);	// removing the domain part
			}
			if (strlen($webserver_url) > 1)
			{
				list(,$referer) = explode($webserver_url,$referer,2);
			}
			$referer = str_replace('/etemplate/process_exec.php','/index.php',$referer);

			if (empty($referer)) $referer = $default;
			
			return $referer;
		}

		// some depricated functions for the migration
		function phpgw_exit($call_footer = False)
		{
			$this->egw_exit($call_footer);
		}

		function phpgw_final()
		{
			$this->egw_final();
		}
		
		function phpgw_header()
		{
			$this->egw_header();
		}
		
		function phpgw_footer()
		{
			$this->egw_footer();
		}
	}//end common class