<?php #user_class.php
/*
Class Description:
Instance:
	-id:string
	-fname:string
	-lname:string
	-situation:string
	-email:string
	-tel:string
	-mobile:string
	-group:Group
	
Methods:
	Non-Static:
	+User(id)
	+get_id():string
	+get_fname:string
	+get_lname():string
	+get_situation():string
	+get_email():string
	+get_tel():string
	+get_mobile():string
	+get_group():Group
	+set_group(id):void
	+get_address():string	
	+get_all_info():array
	+change_my_info(fname, lname, situation, address, email, group, tel, mobile):bool
	+change_my_pwd(original_pwd, new_pwd):bool
	+logout():void
	
	Static:
	+login(id, password):bool
	+create_user(id, fname, lname, situation, address, password, email, group, tel, mobile):string<==error msg|bool<==if success
	+drop_user(id):bool;
	+change_user_info(id, fname, lname, situation, address, password, email, group, tel, mobile):bool
	*+multi_search_user_info($id, $fname, $lname, $situation, $address, $email, $group, $tel, $mobile):array  //has bug when the tel or mobile is null
	+get_user_info(id):array
	+reset_user_pwd(id, new_pwd):bool
	+count_user():int
	+login_state():bool
	+get_current_user():User<==if success::bool<==if fail
*/

require_once('core_functions.php');		//Core Functions class
require_once('dbController.php');		//Database functions class
require_once('group.php');				//User Group class

class User{
	private $id;				//string
	private $fname;				//string
	private $lname;				//string
	private $situation;			//string enum('Miss,Ms,Mrs')
	private $email;				//string
	private $tel;				//string, may be null if N/A
	private $mobile;			//string, may be null if N/A
	private $group_id;			//Object (Group)
	
	//Non-Static functions-------------------------------------------------------------------------------------------
	function __construct($id){
		//Create object via database data
		$id=strtolower(trim($id));
		$infoAry=dbController::get_user_info($id);
		$this->id=$infoAry['user_id'];
		$this->fname=$infoAry['first_name'];
		$this->lname=$infoAry['last_name'];
		$this->situation=$infoAry['situation'];
		$this->email=$infoAry['email'];
		$this->tel=$infoAry['telephone'];
		$this->mobile=$infoAry['mobile'];
		$this->group=serialize(new Group($infoAry['grp_id']));
		$infoAry=null;
	}
	
	public function get_id(){
		return $this->id;
	}
	
	public function get_fname(){
		return $this->fname;
	}
	
	public function get_lname(){
		return $this->lname;
	}
	
	public function get_situation(){
		return $this->situation;
	}
	
	public function get_email(){
		return $this->email;
	}
	
	public function get_tel(){
		return ($this->tel==null)?'Nil':$this->tel;
	}
	
	public function get_mobile(){
		return ($this->mobile==null)?'Nil':$this->mobile;
	}
	
	public function get_group(){
		return unserialize($this->group);
	}
	
	public function set_group($id){
		return $this->group=serialize(new Group($id));
	}
	
	public function get_address(){
		if($result=dbController::get_user_info($this->id,false,false,true))
			return $result['address'];
	}
	
	public function get_all_info(){
		return array('id'=>$this->id, 'fname'=>$this->fname, 'lname'=>$this->lname, 
					 'situation'=>$this->situation, 'email'=>$this->email, 'tel'=>$this->tel, 
					 'mobile'=>$this->mobile, 'group'=>$this->group);
	}
	
	public function change_my_info($fname, $lname, $situation, $address, $email, $group, $tel=null, $mobile=null){
		$fname=trim($fname);
		$lname=trim($lname);
		$situation=trim($situation);
		$address=trim($address);
		$email=trim($email);
		$tel=trim($tel);
		$mobile=trim($mobile);
		$group=trim($group);		
		$isFill=(CoreFunc::check_blank($fname))?true:false;
		$ifFill=($isFill)?CoreFunc::check_blank($lname):false;
		$ifFill=($isFill)?CoreFunc::check_blank($situation):false;
		$ifFill=($isFill)?CoreFunc::check_blank($address):false;
		$ifFill=($isFill)?CoreFunc::check_blank($email):false;
		$ifFill=($isFill)?CoreFunc::check_blank($group):false;
		if($isFill)
			if(dbController::change_user_info($this->id, $fname, $lname, $situation, $address, $email, $group, $tel, $mobile)){
				$this->fname=$fname;
				$this->lname=$lname;
				$this->situation=$situation;
				$this->email=$email;
				$this->group=serialize(new Group($grpInfo['grp_id']));
				$this->tel=$tel;
				$this->mobile=$mobile;
				return true;
			}
		return false;
	}
	
	public function change_my_pwd($original_pwd, $new_pwd){
		//Return true if change password successful. Otherwise, return false.
		$original_pwd=trim($original_pwd);
		$new_pwd=trim($new_pwd);
		$isFill=(CoreFunc::check_blank($original_pwd))?true:false;
		$ifFill=($isFill)?CoreFunc::check_blank($new_pwd):false;
		if($isFill)
			return dbController::change_user_pwd($this->id, $new_pwd, $original_pwd);
		return false;
	}
	
	public function logout(){
		//Clear the session when user logout.
		$_SESSION['userObj']=null;
	}
		
	//Static functions-----------------------------------------------------------------------------------------------
	public static function login($id, $password){
		//If login success, the user info store in Session and return true.
		$_SESSION['userObj']=null;			//Clear session before create new user object
		$result=false;
		$id=strtolower(trim($id));
		$password=trim($password);
		if(!CoreFunc::check_blank($id) && !CoreFunc::check_blank($password))
			return $result;
		$result=dbController::user_login($id, $password);
		if($result!=false){
			$_SESSION['userObj']=serialize(new User($result['user_id']));
			$result=true;
		}
		return $result;
	}
	
	public static function create_user($id, $fname, $lname, $situation, $address, $password, $email, $group, $tel=null, $mobile=null){
		//If create User success, return true. Otherwise return the error message;
		$id=strtolower(trim($id));
		$fname=trim($fname);
		$lname=trim($lname);
		$situation=trim($situation);
		$address=trim($address);
		$password=trim($password);
		$email=trim($email);
		$tel=($tel=='')?null:trim($tel);
		$mobile=($mobile=='')?null:trim($mobile);
		$group=trim($group);
		$isFill=(CoreFunc::check_blank($id))?true:false;
		$isFill=($isFill)?CoreFunc::check_blank($fname):false;
		$ifFill=($isFill)?CoreFunc::check_blank($lname):false;
		$ifFill=($isFill)?CoreFunc::check_blank($situation):false;
		$ifFill=($isFill)?CoreFunc::check_blank($address):false;
		$ifFill=($isFill)?CoreFunc::check_blank($password):false;
		$ifFill=($isFill)?CoreFunc::check_blank($email):false;
		$ifFill=($isFill)?CoreFunc::check_blank($group):false;
		if($isFill)
			return dbController::create_user($id, $fname, $lname, $situation, $address, $password, $email, $group, $tel, $mobile);
		return false;
	}
	
	public static function drop_user($id){ //For staff only.
		//If drop user success, return true. Otherwise, return false.
		if(CoreFunc::is_staff()){
			$isFill=(CoreFunc::check_blank($id))?true:false;
			if($isFill)
				if(dbController::drop_user($id)){
					if($id==$this->id)
						$this->logout();
					return true;
				}
		}
		return false;
	}
	
	public static function change_user_info($id, $fname, $lname, $situation, $address, $email, $group, $tel=null, $mobile=null){ //For staff only.
		if(CoreFunc::is_staff()){
			$id=strtolower(trim($id));
			$fname=trim($fname);
			$lname=trim($lname);
			$situation=trim($situation);
			$address=trim($address);
			$email=trim($email);
			$tel=trim($tel);
			$mobile=trim($mobile);
			$group=trim($group);
			$isFill=(CoreFunc::check_blank($id))?true:false;
			$isFill=($isFill)?CoreFunc::check_blank($fname):false;
			$ifFill=($isFill)?CoreFunc::check_blank($lname):false;
			$ifFill=($isFill)?CoreFunc::check_blank($situation):false;
			$ifFill=($isFill)?CoreFunc::check_blank($address):false;
			$ifFill=($isFill)?CoreFunc::check_blank($email):false;
			$ifFill=($isFill)?CoreFunc::check_blank($group):false;
			if($isFill)
				return dbController::change_user_info($id, $fname, $lname, $situation, $address, $email, $group, $tel, $mobile);
		}
		return false;
	}
	
	public static function multi_search_user_info($id=false, $fname=false, $lname=false, $situation=false, $address=false, $email=false, $group=false, $tel=false, $mobile=false){ //For staff only.
		if(CoreFunc::is_staff()){
			$id=($id && CoreFunc::check_blank($id))?strtolower(trim($id)):false;
			$fname=($fname && CoreFunc::check_blank($fname))?trim($fname):false;
			$lname=($lname && CoreFunc::check_blank($lname))?trim($lname):false;
			$situation=($situation && CoreFunc::check_blank($situation))?trim($situation):false;
			$address=($address && CoreFunc::check_blank($address))?trim($address):false;
			$email=($email && CoreFunc::check_blank($email))?trim($email):false;
			$group=($group && CoreFunc::check_blank($group))?trim($group):false;
			$tel=($tel && CoreFunc::check_blank($tel))?trim($tel):false;
			$mobile=($mobile && CoreFunc::check_blank($mobile))?trim($mobile):false;
			return dbController::multi_search_user_info($id,$fname,$lname,$situation,$address,$email,$group,$tel,$mobile);
		}
		return false;
	}
	
	public static function get_user_info($id){ //For staff only.
		if(CoreFunc::is_staff()){
			$isFill=(CoreFunc::check_blank($id))?true:false;
			if($isFill)
				return dbController::get_user_info($id);
		}
		return false;
	}
	
	public static function reset_user_pwd($id, $new_pwd){ //For staff only.
		if(CoreFUnc::is_staff()){
			$id=strtolower(trim($id));
			$new_pwd=trim($new_pwd);
			$isFill=(CoreFunc::check_blank($id))?true:false;
			$ifFill=($isFill)?CoreFunc::check_blank($new_pwd):false;
			if($isFill)
				return dbController::change_user_pwd($id,$new_pwd);
		}
		return false;
	}

	public static function count_user(){ //For staff only.
		return (CoreFUnc::is_staff())?dbController::count_record('User', 'user_id'):false;
	}
	
	public static function login_state(){
		return @is_object(unserialize($_SESSION['userObj']));
	}
	
	public static function get_current_user(){
		return (@is_object(unserialize($_SESSION['userObj'])))?unserialize($_SESSION['userObj']):false;
	}
}
?>