<?php
/**
 * Created by PhpStorm.
 * User: StefanWarnat
 * Date: 26.03.2019
 * Time: 17:54
 */

namespace Workflow\BPMN;


class Element
{
    const TYPE_STARTEVENT = 'startEvent';
    const TYPE_TASK = 'task';
    const TYPE_EXCLUSIVEGATEWAY = 'exclusiveGateway';

    private $id = null;
    private $name = null;
    private $type = null;

    /**
     * @var Element[]
     */
    private $outgoing = array();

    /**
     * @var Element[]
     */
    private $incoming = array();

    private $sizes = array(
        self::TYPE_EXCLUSIVEGATEWAY => array(50, 50),
        self::TYPE_STARTEVENT => array(36, 36),
        self::TYPE_TASK => array(100, 80),
    );
    /**
     * @var Element
     */
    private $parent = null;
    private $maxChildCount = 1;

    public function __construct($id, $name, $type)
    {
        $this->id = $id;
        $this->name = $name;
        $this->type = $type;
    }

    public function getChildCount() {
        $all = Flow::getAll();

        $currentMax = 1;
        if(empty($this->outgoing)) {
            return 0;
        }

        foreach($this->outgoing as $outgoing) {
            $tmpChildCount = $outgoing->getChildCount();

            if($tmpChildCount > $currentMax) {
                $currentMax = $tmpChildCount;
            }
        }

        return $childCount;
    }

    /*
    public function updateChilds() {

        if($this->maxChildCount < $childCount) {
            $this->maxChildCount = $childCount;

            if($this->parent !== null) {
                $this->parent->adjustMaxChild($childCount);
            }
        }
    }
    */

    public function setParent(Element &$parent) {
        $this->parent = &$parent;
    }

    public function addOutgoing($childObj) {
        $this->outgoing[] = $childObj;
    }
    public function addIncoming($childObj) {
        $this->incoming[] = $childObj;
    }

    public function addChild(Element $child) {
        $child->setParent($this);

        $child->addIncoming($this);
        $this->addOutgoing($child);
    }

    public function getId() {
        return $this->id;
    }
    public function getName() {
        return $this->id;
    }

    /**
     * @param $xml \DOMDocument
     */
    public function addXML($xml) {
        $process = $xml->getElementsByTagName('bpmn:process')[0];

        $block = $xml->createElement('bpmn:'.$this->type);
        $block->setAttribute('id', $this->getId());
        $block->setAttribute('name',$this->getName());
        $process->appendChild($block);

        foreach($this->incoming as $incoming) {
            $flow = $xml->createElement('bpmn:incoming', Flow::getId($incoming->getId(), $this->id));
            $block->appendChild($flow);
        }

        foreach($this->outgoing as $outgoing) {
            $flow = $xml->createElement('bpmn:outgoing', Flow::getId($this->id, $outgoing->getId()));
            $block->appendChild($flow);
        }

    }

}