<?php
/**
 *  
 * @author  Benjamin Gillissen <hide@address.com>
 * 
 *	**************************************************************

	Copyright (C) 2009  Benjamin Gillissen
	
	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	This program 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 General Public License for more details at:
	http://www.gnu.org/copyleft/gpl.html

 *	**************************************************************
 */
class profile extends dbobject {
	
	private static $REALM;
	private static $PROFILE_CACHE;
	
	public function __construct($cnf){
		if ( FALSE === @constant('CORE_AUTH') ){ 
			parent::__construct($cnf);
			return; 
		}	//no auth, profile as ip
		if ( !isset(self::$REALM) ){
			$pid = browsing::get_active();
			$realm = pages::get_realm($pid);
			if ( empty($realm) ){ return; } //no page realm, so no auth, so no profile.
			self::$REALM = new realm($realm);
			if ( !self::$REALM->isloged() ){ self::$REALM->authenticate(); }
		} 
		parent::__construct($cnf);
	}
	
	private function precheck(){
		if ( FALSE === @constant('CORE_AUTH') ){ return client::host();	} //no auth, profile as ip
		if ( !isset(self::$REALM) ){ return FALSE; }
		if ( !self::$REALM->isloged() ){ return FALSE; }
		return self::$REALM->logedas();
	}
	
	public static function client(){
		if ( FALSE === @constant('CORE_AUTH') ){ return client::host();	} //no auth, profile as ip
		if ( !isset(self::$REALM) ){ return FALSE; }
		if ( !self::$REALM->isloged() ){ return FALSE; }
		return self::$REALM->logedas();
	}
	
	public function isdefined($ref){
		if ( FALSE === ( $ruid = $this->precheck()) ){ return FALSE; }
		if ( isset(self::$PROFILE_CACHE[md5($ruid)][$ref]) ){ return (self::$PROFILE_CACHE[md5($ruid)][$ref] !== FALSE); }
		$arg=Array('ref'=>md5($ruid), 'var'=>$ref);
		$r = $this->dbquery($arg, 'exists');
		if ( $r ){
			$data = $this->dbquery($arg, 'read', 'data');
			self::$PROFILE_CACHE[md5($ruid)][$ref] = $data;
		} else {
			self::$PROFILE_CACHE[md5($ruid)][$ref] = FALSE;
		}
		return $r;
		//dbispresent on ref, $ruid
	}

	public function read($ref){
		if ( FALSE === $this->isdefined($ref) ){ return FALSE; }
		if ( FALSE === ( $ruid = $this->precheck()) ){ return FALSE; }
		if ( isset(self::$PROFILE_CACHE[md5($ruid)][$ref]) ){ return unserialize(base64_decode(self::$PROFILE_CACHE[md5($ruid)][$ref])); }
		$arg=Array('ref'=>md5($ruid), 'var'=>$ref);
		$data = $this->dbquery($arg, 'read', 'data');
		self::$PROFILE_CACHE[md5($ruid)][$ref] = $data;
		return unserialize(base64_decode($data));
		//dbread  on ref, logedas
	}
	
	public function set($ref, $val){
		if ( FALSE === ( $ruid = $this->precheck()) ){ return FALSE; }
		$arg=Array('ref'=>md5($ruid), 'var'=>$ref, 'data'=>base64_encode(serialize($val)) );
		self::$PROFILE_CACHE[md5($ruid)][$ref] = $arg['data'];
		if ( $this->isdefined($ref) ){ return $this->dbquery($arg, 'update'); }
		return $this->dbquery($arg, 'create');
	}
	
	public function del($ref){
		if ( FALSE === ( $ruid = $this->precheck()) ){ return FALSE; }
		if ( isset(self::$PROFILE_CACHE[md5($ruid)][$ref]) ){ unset(self::$PROFILE_CACHE[md5($ruid)][$ref]); }
		$arg=Array('ref'=>md5($ruid), 'var'=>$ref);
		return $this->dbquery($arg, 'delone');
		//dbdel on ref, logedas
	}
	
	public function clear(){
		if ( FALSE === ( $ruid = $this->precheck()) ){ return FALSE; }
		if ( isset(self::$PROFILE_CACHE[md5($ruid)]) ){ unset(self::$PROFILE_CACHE[md5($ruid)]); }
		$arg=Array('ref'=>md5($ruid));
		return $this->dbquery($arg, 'delbyref');
		//dbdel on ref, logedas
	}
	
}