<?php
	/**************************************************************************\
	* phpGroupWare API - Preferences                                           *
	* This file written by Joseph Engo <jengo@phpgroupware.org>                *
	* and Mark Peters <skeeter@phpgroupware.org>                               *
	* Manages user preferences                                                 *
	* Copyright (C) 2000, 2001 Joseph Engo                                     *
	* -------------------------------------------------------------------------*
	* This library is part of the phpGroupWare API                             *
	* http://www.phpgroupware.org/api                                          * 
	* ------------------------------------------------------------------------ *
	* 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            *
	\**************************************************************************/

	/* $Id$ */
	/*!
	@class preferences 
	@abstract preferences class used for setting application preferences
	@discussion Author: none yet
	*/
	class preferences
	{
		/*! @var account_id */
		var $account_id;
		/*! @var account_type */
		var $account_type;
		/*! @var data */
		var $data = array();
		/*! @var db */
		var $db;

		/**************************************************************************\
		* Standard constructor for setting $this->account_id                       *
		\**************************************************************************/
		/*! 
		@function preferences
		@abstract Standard constructor for setting $this->account_id
		@discussion Author:
		*/
		function preferences($account_id = '')
		{
			$this->db         = $GLOBALS['phpgw']->db;
			$this->account_id = get_account_id($account_id);
		}

		/**************************************************************************\
		* These are the standard $this->account_id specific functions              *
		\**************************************************************************/

		/*! 
		@function read_repository
		@abstract private - read preferences from the repository
		@discussion private function should only be called from within this class
		*/
		function read_repository()
		{
			$this->db->query("SELECT * FROM phpgw_preferences WHERE "
				. "preference_owner='" . $this->account_id . "' or "
				. "preference_owner='-1' order by preference_owner desc",__LINE__,__FILE__);
			$this->db->next_record();

			$pref_info  = $this->db->f('preference_value');
			$this->data = unserialize($pref_info);

			if ($this->db->next_record())
			{
				$global_defaults = unserialize($this->db->f('preference_value'));

				while (is_array($global_defaults) && list($appname,$values) = each($global_defaults))
				{
					while (is_array($values) && list($var,$value) = each($values))
					{
						$this->data[$appname][$var] = $value;
					}
				}
			}

			/* This is to supress warnings during login */
			if (is_array($this->data))
			{
				 reset ($this->data);
			}

			// This is to supress warnings durring login
			if (is_array($this->data))
			{
				reset($this->data);
			}
			return $this->data;
		}

		/*!
		@function read
		@abstract public - read preferences from repository and stores in an array
		@discussion Syntax array read(); <>
		Example1: preferences->read();
		@result $data array containing user preferences
		*/
		function read()
		{
			if (count($this->data) == 0)
			{
				$this->read_repository();
			}
			reset ($this->data);
			return $this->data;
		}

		/*!
		@function add
		@abstract add preference to $app_name a particular app
		@discussion
		@param $app_name name of the app
		@param $var name of preference to be stored
		@param $value value of the preference
		*/
		function add($app_name,$var,$value = '')
		{
			if (! $value)
			{
				global $$var;
				$value = $$var;
			}
 
			$this->data[$app_name][$var] = $value;
			reset($this->data);
			return $this->data;
		}

		/*! 
		@function delete
		@abstract delete preference from $app_name
		@discussion
		@param $app_name name of app
		@param $var variable to be deleted
		*/
		function delete($app_name, $var = '')
		{
			if (is_string($var) && $var == '')
			{
//				$this->data[$app_name] = array();
				unset($this->data[$app_name]);
			}
			else
			{
				unset($this->data[$app_name][$var]);
			}
			reset ($this->data);
			return $this->data;
		}

		/*!
		@function save_repository
		@abstract save the the preferences to the repository
		@discussion
		*/
		function save_repository($update_session_info = False)
		{
			$temp_data = $this->data;
			if (! $GLOBALS['phpgw']->acl->check('session_only_preferences',1,'preferences'))
			{
				$this->db->transaction_begin();
				$this->db->query("delete from phpgw_preferences where preference_owner='" . $this->account_id
						. "'",__LINE__,__FILE__);

				if (floor(phpversion()) < 4)
				{
					$pref_info = addslashes(serialize($this->data));
				}
				else
				{
					$pref_info = serialize($this->data);
				}
				$this->db->query("insert into phpgw_preferences (preference_owner,preference_value) values ('"
						. $this->account_id . "','" . $pref_info . "')",__LINE__,__FILE__);

				$this->db->transaction_commit();
			}
			else
			{
				$GLOBALS['phpgw_info']['user']['preferences'] = $this->data;
				$GLOBALS['phpgw']->session->save_repositories();
			}

			if ($GLOBALS['phpgw_info']['server']['cache_phpgw_info'] && $this->account_id == $GLOBALS['phpgw_info']['user']['account_id'])
			{
				$GLOBALS['phpgw']->session->read_repositories(False);
			}
			
			return $temp_data;
		}

		function create_defaults($account_id)
		{
			$this->db->query("select * from phpgw_preferences where preference_owner='-2'",__LINE__,__FILE__);
			$this->db->next_record();

			$this->db->query("insert into phpgw_preferences values ('$account_id','"
				. $this->db->f('preference_value') . "')",__LINE__,__FILE__);
		}

		/*!
		@function update_data
		@abstract update the preferences array
		@discussion 
		@param $data array of preferences
		*/
		function update_data($data)
		{
			reset($data);
			$this->data = Array();
			$this->data = $data;
			reset($this->data);
			return $this->data;
		}

		/* legacy support */
		function change($app_name,$var,$value = "")
		{
			return $this->add($app_name,$var,$value);
		}
		function commit($update_session_info = True)
		{
			return $this->save_repository($update_session_info);
		}

		/**************************************************************************\
		* These are the non-standard $this->account_id specific functions          *
		\**************************************************************************/

		/*!
		@function verify_basic_settings
		@abstract verify basic settings
		@discussion
		*/
		function verify_basic_settings()
		{
			if (gettype($GLOBALS['phpgw_info']['user']['preferences']) != 'array')
			{
				 $GLOBALS['phpgw_info']['user']['preferences'] = array();
			}
			/* This takes care of new users who dont have proper default prefs setup */
			if (!isset($GLOBALS['phpgw_info']['flags']['nocommon_preferences']) || 
				!$GLOBALS['phpgw_info']['flags']['nocommon_preferences'])
			{
				$preferences_update = False;
				if (!isset($GLOBALS['phpgw_info']['user']['preferences']['common']['maxmatchs']) || 
					!$GLOBALS['phpgw_info']['user']['preferences']['common']['maxmatchs'])
				{
					$this->add('common','maxmatchs',15);
					$preferences_update = True;
				}
				if (!isset($GLOBALS['phpgw_info']['user']['preferences']['common']['theme']) || 
					!$GLOBALS['phpgw_info']['user']['preferences']['common']['theme'])
				{
					$this->add('common','theme','default');
					$preferences_update = True;
				}
				if (!isset($GLOBALS['phpgw_info']['user']['preferences']['common']['template_set']) || 
					!$GLOBALS['phpgw_info']['user']['preferences']['common']['template_set'])
				{
					$this->add('common','template_set','default');
					$preferences_update = True;
				}
				if (!isset($GLOBALS['phpgw_info']['user']['preferences']['common']['dateformat']) || 
					!$GLOBALS['phpgw_info']['user']['preferences']['common']['dateformat'])
				{
					$this->add('common','dateformat','m/d/Y');
					$preferences_update = True;
				}
				if (!isset($GLOBALS['phpgw_info']['user']['preferences']['common']['timeformat']) || 
					!$GLOBALS['phpgw_info']['user']['preferences']['common']['timeformat'])
				{
					$this->add('common','timeformat',12);
					$preferences_update = True;
				}
				if (!isset($GLOBALS['phpgw_info']['user']['preferences']['common']['lang']) || 
					!$GLOBALS['phpgw_info']['user']['preferences']['common']['lang'])
				{
					$this->add('common','lang',$GLOBALS['phpgw']->common->getPreferredLanguage());
					$preferences_update = True;
				}
				if ($preferences_update)
				{
					$this->save_repository();
				}
				unset($preferences_update);
			}
		}

		/*!
		@function get_mailsvr_port
		@abstract get_mailsvr_port
		@discussion This will generate the appropriate port number to access a
			mail server of type pop3, pop3s, imap, imaps users value from
			$phpgw_info['user']['preferences']['email']['mail_port'].
			if that value is not set, it generates a default port for the given
			$server_type
		@param $prefs - any user preferences
		*/	
		function get_mailsvr_port($prefs)
		{
			/*// UNCOMMENT WHEN mail_port IS A REAL, USER SET OPTION
			// first we try the port number supplied in preferences
			if ( (isset($prefs['email']['mail_port']))
			&& ($prefs['email']['mail_port'] != '') )
			{
				$port_number = $prefs['email']['mail_port'];
			}
			// preferences does not have a port number, generate a default value
			else
			{
			*/
				switch($prefs['email']['mail_server_type'])
				{
					case 'imaps':		// IMAP over SSL
						$port_number = 993;
						break;
					case 'pop3s':		// POP3 over SSL
						$port_number = 995;
						break;
					case 'pop3':		// POP3 normal connection, No SSL
								// ( same string as normal imap above)
						$port_number = 110;
						break;
					case 'nntp':		// NNTP news server port
						$port_number = 119;
						break;
					case 'imap':		// IMAP normal connection, No SSL 
					default:		// UNKNOWN SERVER in Preferences, return a
								// default value that is likely to work
								// probably should raise some kind of error here
						$port_number = 143;
						break;
				}
				// set the preference string, since it was not set and that's why we are here
				//$prefs['email']['mail_port'] = $port_number;
			// UNCOMMENT WHEN mail_port IS A REAL, USER SET OPTION
			//}
			return $port_number;
		}

		/*!
		@function create_email_preferences
		@abstract create email preferences
		@param $account_id -optional defaults to : phpgw_info['user']['account_id']
		@discussion 
		(old) This fills the global $phpgw_info array with the required email preferences for this user
		(old was changed: new) fills a local copy of ['email'][] prefs array which is then returned to the calling
		proc, which the calling proc generally tacks onto the global $phpgw_info array as such:
			$GLOBALS['phpgw_info']['user']['preferences'] = $GLOBALS['phpgw']->preferences->create_email_preferences();
		which fills an array based at:
			$GLOBALS['phpgw_info']['user']['preferences']['email']
		Most times, this function used the existence, or lack thereof, of certain custom preferences read from the
		repository as an indication of whether to use server defaults or that specified user custom preference.
		This means that generally there is not a "pref not set" value, instead an unspecified preference generally
		does not exist in the repository. This can be an issue when, for example, a new user first uses then email
		app, if that user never went to the prefs page and specifically set "use sent folder" then, perhaps unknown
		to that user, the users sent mail is NOT being sent to a "sent" folder.
		ISSUE: unset = no preference. However, when reading the preferences for the FIRST time ever for a user,
		and a preference "use sent folder" does not exist (is not set), we do not know if (a) the user purposely does NOT
		want to use the sent folder, or (b) the user has never actually been to the preferences page, and does not know
		that "use sent folder" is an option that is not enabled.
		*/	
		function create_email_preferences($accountid='')
		{
			$default_trash_folder = 'Trash';
			$default_sent_folder = 'Sent';
			
			$account_id = get_account_id($accountid);
			// If the current user is not the request user, grab the preferences
			// and reset back to current user.
			if($account_id != $this->account_id)
			{
				// Temporarily store the values to a temp, so when the
				// read_repository() is called, it doesn't destory the
				// current users settings.
				$temp_account_id = $this->account_id;
				$temp_data = $this->data;
				
				// Grab the new users settings, only if they are not the
				// current users settings.
				$this->account_id = $account_id;
				$prefs = $this->read_repository();
				
				// Reset the data to what it was prior to this call
				$this->account_id = $temp_account_id;
				$this->data = $temp_data;
			}
			else
			{
				$prefs = $this->data;
			}

			// Add default preferences info
			if (!isset($prefs['email']['userid']))
			{
				if ($GLOBALS['phpgw_info']['server']['mail_login_type'] == 'vmailmgr')
				{
					$prefs['email']['userid'] = $GLOBALS['phpgw']->accounts->id2name($account_id)
						. '@' . $GLOBALS['phpgw_info']['server']['mail_suffix'];
				}
				else
				{
					$prefs['email']['userid'] = $GLOBALS['phpgw']->accounts->id2name($account_id);
				}
			}
			// Set Server Mail Type if not defined
			if (empty($GLOBALS['phpgw_info']['server']['mail_server_type']))
			{
				$GLOBALS['phpgw_info']['server']['mail_server_type'] = 'imap';
			}
			if (!isset($prefs['email']['address']))
			{
				$prefs['email']['address'] = $GLOBALS['phpgw']->accounts->id2name($account_id)
					. '@' . $GLOBALS['phpgw_info']['server']['mail_suffix'];
			}
			if (!isset($prefs['email']['mail_server']))
			{
				$prefs['email']['mail_server'] = $GLOBALS['phpgw_info']['server']['mail_server'];
			}
			if (!isset($prefs['email']['mail_server_type']))
			{
				$prefs['email']['mail_server_type'] = $GLOBALS['phpgw_info']['server']['mail_server_type'];
			}
			if (!isset($prefs['email']['imap_server_type']))
			{
				$prefs['email']['imap_server_type'] = $GLOBALS['phpgw_info']['server']['imap_server_type'];
			}
		
			// ====  UWash Mail Folder Location used to be "mail", now it's changeable, but keep the
			// ====  default to "mail" so upgrades happen transparently
			// ---  TEMP MAKE DEFAULT UWASH MAIL FOLDER ~/mail (a.k.a. $HOME/mail)
			$GLOBALS['phpgw_info']['server']['mail_folder'] = 'mail';
			// ---  DELETE THE ABOVE WHEN THIS OPTION GETS INTO THE SYSTEM SETUP
			// pick up custom "mail_folder" if it exists (used for UWash and UWash Maildor servers)
			// else use the system default (which we temporarily hard coded to "mail" just above here)
		
			// because of the way this option works, an empty string IS ACTUALLY a valid value
			// which represents the $HOME/* as the UWash mail files location
			// THERFOR we must check the "Use_custom_setting" option to help us figure out what to do
			if (!isset($prefs['email']['use_custom_settings']))
			{
				// we are NOT using custom settings so this MUST be the server default
				$prefs['email']['mail_folder'] = $GLOBALS['phpgw_info']['server']['mail_folder'];
			}
			else
			{
				// we ARE using custom settings AND a BLANK STRING is a valid option, so...
				if ((isset($prefs['email']['mail_folder']))
				&& ($prefs['email']['mail_folder'] != ''))
				{
					// using custom AND a string exists, so "mail_folder" is that string stored in the custom prefs by the user
					// DO NOTING - VALID OPTION VALUE for $prefs['email']['mail_folder']
				}
				else
				{
					// using Custom Prefs BUT this text box was left empty by the user on submit, so no value stored
					// BUT since we are using custom prefs, "mail_folder" MUST BE AN EMPTY STRING
					// which is an acceptable, valid preference, overriding any value which
					// may have been set in ["server"]["mail_folder"]
					// This is one of the few instances in the preference class where an empty, unspecified value
					// actually does NOT get deleted from the repository.
					$prefs['email']['mail_folder'] = '';
				}
			}

			// This is going to be used to switch to the nntp class
			if ((isset($GLOBALS['phpgw_info']['flags']['newsmode'])
			&& $GLOBALS['phpgw_info']['flags']['newsmode']))
			{
				$prefs['email']['mail_server_type'] = 'nntp';
			}

			// These sets the mail_port server variable
			$prefs['email']['mail_port'] = $this->get_mailsvr_port($prefs);

			// if the option to use the Trash folder is ON, make sure a proper name is specified
			if (isset($prefs['email']['use_trash_folder']))
			{
				if ((!isset($prefs['email']['trash_folder_name']))
				|| ($prefs['email']['trash_folder_name'] == ''))
				{
					$prefs['email']['trash_folder_name'] = $default_trash_folder;
				}
			}

			// if the option to use the sent folder is ON, make sure a proper name is specified
			if (isset($prefs['email']['use_sent_folder']))
			{
				if ((!isset($prefs['email']['sent_folder_name']))
				|| ($prefs['email']['sent_folder_name'] == ''))
				{
					$prefs['email']['sent_folder_name'] = $default_sent_folder;
				}
			}	

			// SANITY CHECK - is it possible to use Trash and Sent folders - i.e. using IMAP server
			// if not - force settings to false
			if  (($prefs['email']['mail_server_type'] != 'imap')
			&& ($prefs['email']['mail_server_type'] != 'imaps'))
			{
				if (isset($prefs['email']['use_sent_folder']))
				{
					unset($prefs['email']['use_sent_folder']);
				}
	
				if (isset($prefs['email']['use_trash_folder']))
				{
					unset($prefs['email']['use_trash_folder']);
				}
			}

			// Layout Template Preference
			// layout 1 = default ; others are prefs
			if (!isset($prefs['email']['layout']))
			{
				$prefs['email']['layout'] = 1;
			}
			// force seeting here to test stuff
			//$prefs['email']['layout'] = 1;
			//$prefs['email']['layout'] = 2;

			// DEBUG
			//echo "<br>prefs['email']: <br>"
			//	.'<pre>'.serialize($prefs['email']) .'</pre><br>';
			return $prefs;
		}
	} /* end of preferences class */
?>