Sked schedule parser

<?php
/**
 * Sked schedule parser algorithm
 * Developed by Hauke Marquardt
 *
 * License: CC BY-SA
 * Uses: http://sourceforge.net/projects/simplehtmldom/
 */

class Day
{
    public $name;
    public $date;
    public $startCol;
    public $endCol;

    public function __construct($_startCol = 0, $_endCol = 0) {
        $this->startCol = $_startCol;
        $this->endCol = $_endCol;
    }

    public function dateAsTimestamp() {
        return DateTime::createFromFormat('d.m.Y h:i:s', $this->date . '00:00:00')->getTimestamp();
    }
}

class Event
{
    public $startRow;
    public $rowspan;
    public $description;
    public $startTime;
    public $endTime;
    public $day;
    public $isImportant;

    public function __construct($_startRow = 0, $_rowspan = 0, $_description = '') {
        $this->startRow = $_startRow;
        $this->rowspan = $_rowspan;
        $this->description = htmlentities($_description);

        $this->startTime = ($this->startRow - 1) * 5 * 60 + 7 * 60 * 60;
        $this->endTime = $this->startTime + $this->rowspan * 5 * 60;
    }
}

class SkedScheduleParser {

    public $url = null;
    public $days = null;
    public $events = null;

    private $html = null;
    private $curl = null;

    public function __construct($_url) {
        $this->url = utf8_decode($_url);
        $this->curl = new Curl();
    }

    public function loadHTML() {
        $this->html = str_get_html($this->curl->get($this->url));
    }

    public function parseTable($tableNumber = 0) {

        $table = $this->html->find('table', $tableNumber);

        $this->days = array();

        $cols = $table->find('colgroup', 0)->find('col');
        $newDay = false;
        $tmpDay = new Day();
        // block first 2 and last 2 colums
        for($i = 2; $i < count($cols) - 2; $i++) {
            if($cols[$i]->width == 5 && !$newDay) {
                $tmpDay->startCol = $i;
                $newDay = true;
            }
            else if($cols[$i]->width == 5 && $newDay) {
                $tmpDay->endCol = $i;
                $this->days[] = new Day($tmpDay->startCol, $tmpDay->endCol);
                $newDay = false;

                // end loop if sunday reached
                if(count($this->days) == 7) {
                    break;
                }
            }
        }

        $daysCol = $table->find('tr', 0)->find('td');
        // block first 2 and last 2 colums
        $colIterator = 0;
        for($i = 0; $i < count($daysCol); $i++) {

            foreach($this->days as &$day) {
                if($day->startCol == $colIterator) {
                    $day->name = trim(substr($daysCol[$i]->plaintext, 0, strpos($daysCol[$i]->plaintext, ',')));
                    $day->date = trim(substr($daysCol[$i]->plaintext, strrpos($daysCol[$i]->plaintext, ',') + 1, strlen($daysCol[$i]->plaintext)));
                }
            }

            if(isset($daysCol[$i]->colspan)) {
                $colIterator += intval($daysCol[$i]->colspan);
            }
            else {
                $colIterator ++;
            }
        }

        // initialize row iterator for every colum
        $rowIterator = array();
        for($i = 0; $i < count($cols); $i++) {
            $rowIterator[$i] = 0;
        }

        // initialize array for all events
        $this->events = array();
        foreach($this->days as $day) {
            $this->events[] = array();
        }

        // reset colIterator
        $tableRows = $table->find('tr');
        $currentRowIndex = 0;
        foreach($tableRows as $tableRow) {
            $tableRowCols = $tableRow->find('td');

            foreach($tableRowCols as $tableRowCol) {
                $rowspan = 1;
                if(isset($tableRowCol->rowspan)) {
                    $rowspan = intval($tableRowCol->rowspan);
                }

                $colspan = 1;
                if(isset($tableRowCol->colspan)) {
                    $colspan = intval($tableRowCol->colspan);
                }

                for($i = 0; $i < count($rowIterator); $i++) {
                    if($rowIterator[$i] <= $currentRowIndex) {
                        for($o = 0; $o < $colspan; $o++) {
                            $rowIterator[$i + $o] += $rowspan;
                        }

                        // find events
                        if(isset($tableRowCol->id) && isset($tableRowCol->class) && $tableRowCol->class == 'v') {
                            for($d = 0; $d < count($this->days); $d++) {
                                if($this->days[$d]->startCol <= $i && $this->days[$d]->endCol >= $i) {
                                    $this->events[$d][] = new Event($currentRowIndex,
                                        $rowspan,
                                        $tableRowCol->innertext
                                    );
                                    break;
                                }
                            }
                        }
                        break;
                    }
                }
            }
            $currentRowIndex++;
        }
    }
}