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<?php
class kdb_conn{
		public $db, $user, $pass, $conn, $last_id, $recordsLength; 
		function __construct($host, $user, $pass, $db){
			$this->host = $host;
			$this->db = $db;
			$this->user = $user;
			$this->pass = $pass;
		}
		function setConnection($conn){
			$this->conn = $conn;
		}
		function &getConnection(){
			$conn;
			if(!isset($this->conn)){
				$conn = mysql_connect($this->host, $this->user, $this->pass);
				mysql_select_db($this->db, $conn);
			}
			else{
				$conn = $this->conn;
			}
			$this->activeConn = $conn;
			return $conn;
		}
		function insert($table, $fields, $options = array()){
			$op = array_merge(array('escape'=> true, 'dynamic'=> array(), 'auto_update'=> false), $options);
			$key = null;
			if($op['auto_update'] ){
				$key = "id";
				if( $op['auto_update']!==true){
					$key =  $op['auto_update'];
				}
			}
			if($op['auto_update'] && isset($fields[$key])){
				$where = array($key=> $fields[$key]);
				unset($fields[$key]);
				return $this->update($table, $fields, $where);
			}
			$f = $v = "";
			foreach($fields as $i=>$_v){
				//print_r($op['dynamic']);
				$is_dyn = $_v =='now()' ||  
				(is_array( $op['dynamic']) && in_array( $i, $op['dynamic'])) ||
				(!is_array( $op['dynamic']) && $i == $op['dynamic']);
				if(!$is_dyn && $op['escape'] ){
					$_v = mysql_escape_string($_v);
				}
				if($f!=""){
					$f.=", ";
					$v.=", ";
				}
				$f .= "`$i`";
				if($is_dyn){
					$v .= "$_v";
				} else{
					$v .= "'$_v'";
				}
			}
			$q = "INSERT INTO $table($f) VALUES($v)";    
			//echo $q; die;
			$rs = $this->query($q, $options); 
			$this->last_id = $this->get_var("SELECT LAST_INSERT_ID()");
			return $this->last_id;
		}
		function update($table, $fields, $where, $options=array()){
			$op = array_merge(array('escape'=> true, 'dynamic'=> array()), $options);
			$f = $w = "";
			foreach($fields as $i=>$_f){
				$is_dyn = $_f =='now()' ||  
				(is_array( $op['dynamic']) && in_array( $i, $op['dynamic'])) ||
				(!is_array( $op['dynamic']) && $i == $op['dynamic']);
				if(!$is_dyn || $op['escape'] ){ //echo " $_f, "; 
					$_f = mysql_escape_string($_f);
				}
				
				$f .= $f==""?"":", ";
				if(!$is_dyn){
					$f .= "`$i` = '$_f'";
				} else{
					$f .= "`$i` = $_f";
				}
			}
			foreach($where as $i=>$_w){
				$is_dyn = $_w =='now()' ||  
				(is_array( $op['dynamic']) && in_array( $i, $op['dynamic'])) ||
				(!is_array( $op['dynamic']) && $i == $op['dynamic']);
				if(!$is_dyn || $op['escape'] ){
					$_w = mysql_escape_string($_w);
				}
				$w .= $w==""?"":" AND ";
				if(!$is_dyn){
					$w .= "`$i` = '$_w'";
				} else{
					$w .= "`$i` = $_w";
				}
			}
			if(!empty($w)){
				$w = " WHERE $w";
			}
			$qry = "UPDATE $table SET $f $w";
			 // echo $qry; die;
			return $this->query($qry, $options); 
		}
		function query($sql, $options=array()){
			$arr=false;
			if(isset($options['numericIndex']) && $options['numericIndex']){
				$arr = true;
			}
			$this->getConnection();
			$results = Array();
			if(isset($options['debug']) && $options['debug']==true){
				 echo "<p style='color:red;'> $sql </p><br/>";
			}
			
			$rs = mysql_query($sql, $this->activeConn);
			//var_dump($rs); //echo "<-- in qry "; var_dump($this->activeConn); var_dump($rs); echo $sql.'<br>'; die;
			if($rs===true || $rs===false){
				return $rs;
			}
			if($arr==false){
				while($ar = mysql_fetch_assoc($rs)){
					//print_r($ar); die;
					$results[] = $ar;
				}
			}
			else{
				$results[] = mysql_fetch_array($rs);
			}
			 //print_r($results); die;
			return $results;
		}
		
		function get_list($query, $fields=Array('id', 'name'), $options=array()){
			$rs = $this->query($query, $options);
			$rt = Array();
			foreach($rs as $i=>$v){
				$rt[$v[$fields[0]]] = $v[$fields[1]];
			} 
			return $rt;
		}
		function get_var($query, $options=array()){
			$options['numericIndex'] = true;
			$rs = $this->query($query, $options);
			return count($rs)>0 && count($rs[0])>0? $rs[0][0]: null;
		}
		function get_row($query, $options = array()){
			$rs = $this->query($query, $options);
			$rs = count($rs)==0 ? $rs:$rs[0];
			return $rs;
		}
		function close(){
			mysql_close($this->activeConn);
		}
	}
?>