<?php
class ComponentSearchVisitor extends FormositeVisitor {
    private $type;
    private $crits = array();
    private $matches = array();

    function __construct($type, $crits)
    {
        $this->type = $type;
        $this->crits = $crits;
    }

    function testComp($comp)
    {
    	$selected = true;
    	
    	foreach($this->crits as $attr => $value) {
    		if ($attr == 'id') {
	    		if ($comp->getId() != $value) {
	    			$selected = false;
	    			break;
	    		}
    		} else {
    			if ($comp->$attr != $value) {
	    			$selected = false;
	    			break;
	    		}
    		}
    	}
    	return $selected;
    }

    function visitFormosite(Formosite $comp, $level)
    {
        if ($this->testComp($comp)) {
            $this->matches[] = $comp;
        }
    }
    function visitPage(Page $comp, $level)
    {
    	if ($this->testComp($comp)) {
            $this->matches[] = $comp;
        }
    }
    function visitBlock(Block $comp, $level)
    {
    	if ($this->testComp($comp)) {
            $this->matches[] = $comp;
        }
    }
    
	function visitField(Field $comp, $level)
    {
    	if ($this->testComp($comp)) {    		
            $this->matches[] = $comp;
        }
    }
	function unique()
    {
    	$unique = (count($this->matches) == 1 && is_object($this->matches[0])) ? true : false;
        return $unique;
    }
    function matches($index='')
    {
    	if ($index !== '' && is_numeric($index)) {
    		return $this->matches[$index];
    	} else {
    		return $this->matches;
    	}
    }
} 
?>