<?php
class View{
	public function __construct( $source ){
		$this->GetSource( $source );
		$this->GetVariables();
	}

	public function __toString(){
		return $this->Render();
	}

	public function ClearVariables(){
		foreach( $this as $k => $v ){
			$this->$k = '';
		}
	}

	public function GetSource( $var = null ){
		static $enc = array();
		$id = GetInstanceId( $this );

		if( !empty( $var ) ){
			$enc[ $id ] = $var;
		}else{
			return $enc[ $id ];
		}
	}

	public function GetVariableDefault( $var = null ){
		static $enc = array();
		$id = GetInstanceId( $this );

		if( is_array( $var ) ){
			$enc[ $id ] = $var;
		}else if( is_scalar( $var ) ){
			return $enc[ $id ][ $var ];
		}else{
			return $enc[ $id ];
		}
	}

	public function GetVariableName( $var = null ){
		static $enc = array();
		$id = GetInstanceId( $this );

		if( is_array( $var ) ){
			$enc[ $id ] = $var;
		}else{
			return $enc[ $id ];
		}
	}

	public function Render(){
		ob_start();
		eval( '?' . '>' . $this->GetSource() );
		return ob_get_clean();
	}

	public function SetVariable( $k, $v ){
		if( isset( $this->$k ) ){
			$this->$k = $v;
		}
	}

	public function SetVariables( $obj ){
		if( is_array( $obj ) || is_object( $obj ) ){
			foreach( $obj as $k => $v ){
				$this->SetVariable( $k, $v );
			}
		}
	}

	public function SetVariableDefaults(){
		$defaults = $this->GetVariableDefault();
		foreach( $defaults as $k => $v ){
			$this->$k = $v;
		}
	}

	private function GetVariables(){
		$defaults = array();
		$variables = array();
		if( preg_match_all( '/\$this->(\w+)[^\(]/', $this->GetSource(), $matches, PREG_SET_ORDER ) ){
			while( list( $_, list( $_, $name ) ) = each( $matches ) ){
				$defaults[ $name ] = '';
			}
			$variables = array_keys( $defaults );
		}

		//Set the enclosure
		$this->GetVariableName( $variables );

		ob_start();
		@eval( '?' . '>' . $this->GetSource() );
		ob_end_clean();

		foreach( $defaults as $k => $v ){
			if( !empty( $this->$k ) ){
				$defaults[ $k ] = $this->$k;
			}
		}

		//Set the enclosure
		$this->GetVariableDefault( $defaults );
	}
}