<?php
/**
 * JEvents Component for Joomla! 3.x
 *
 * @version     $Id: csvLine.php 3285 2012-02-21 14:56:25Z geraintedwards $
 * @package     JEvents
 * @copyright   Copyright (C) 2008-2020 GWESystems Ltd, 2006-2008 JEvents Project Group
 * @license     GNU/GPLv2, see http://www.gnu.org/licenses/gpl-2.0.html
 * @link        http://www.jevents.net
 */

// no direct access
defined('_JEXEC') or die('Restricted access');

/**
 * Class for objects containing lines of converted CSV file to iCal format
 *
 * Part of the CSV to iCal conversion mechanism
 */
class CsvLine
{

	var $uid;
	var $categories;
	var $summary;
	var $location;
	var $description;
	var $contact;
	var $extraInfo;
	var $dtstamp;
	var $dtstart;
	var $dtend;
	var $timezone;
	var $rrule;
	var $noendtime;
	var $multiday;
	var $cf;

	/**
	 * default constructor with manatory parameters
	 *
	 * @param categories category of the event
	 * @param summary title (name) of the event
	 * @param dtstart start datetime of the event
	 * @param dtend end datetime of the event
	 */
	public function __construct($categories, $summary, $dtstart, $dtend)
	{

		$this->categories = $categories;
		$this->summary    = $summary;
		$this->dtstart    = $dtstart;
		$this->dtend      = $dtend;
		// default timezone
		$this->timezone = date_default_timezone_get();

		$this->cf = array();
	}

	/**
	 * Getters and setters
	 */
	public function getCategories()
	{

		return $this->categories;
	}

	public function setCategories($categories)
	{

		$this->categories = $categories;
	}

	public function getSummary()
	{

		return $this->summary;
	}

	public function setSummary($summary)
	{

		$this->summary = $summary;
	}

	public function getLocation()
	{

		return $this->location;
	}

	public function setLocation($location)
	{

		$this->location = $location;
	}

	public function getDescription()
	{

		return trim($this->description);
	}

	public function setDescription($description)
	{

		$this->description = trim($description);
	}

	public function getContact()
	{

		return $this->contact;
	}

	public function setContact($contact)
	{

		$this->contact = trim($contact);
	}

	public function getRRule()
	{

		return $this->rrule;
	}

	public function setRrule($rrule)
	{

		$this->rrule = trim($rrule);
	}

	public function getNoendtime()
	{

		return $this->noendtime;
	}

	public function setNoendtime($noendtime)
	{

		$this->noendtime = intval($noendtime);
	}

	public function getPublished()
	{

		return $this->published;
	}

	public function setPublished($published)
	{

		$this->published = intval($published);
	}

	public function getMultiday()
	{

		return $this->multiday;
	}

	public function setMultiday($multiday)
	{

		$this->multiday = intval($multiday);
	}

	public function Customfield($cf, $col)
	{

		$this->cf[$col] = $cf;
	}

	public function getExtraInfo()
	{

		return $this->extraInfo;
	}

	public function setExtraInfo($extraInfo)
	{

		$this->extraInfo = $extraInfo;
	}

	public function getColor() {
		return $this->color;
	}

	public function setColor($color) {
		$this->color = $color;
	}

    public function getDtstamp() {
        return $this->dtstamp;
    }

	public function setDtstamp($dtstamp)
	{

		if (trim($dtstamp) == "") return;
		$this->dtstamp = JevDate::strtotime($dtstamp);
	}


	public function getDtend()
	{

		return $this->dtend;
	}

	public function setDtend($dtend)
	{

		$this->dtend = JevDate::strtotime($dtend);
	}

	public function getTimezone()
	{

		return $this->timezone;
	}

	public function setTimezone($timezone)
	{

		$this->timezone = $timezone;
	}

	/**
	 * function prepares event in iCal format
	 *
	 * @return this object in iCal format
	 */
	public function getInICalFormat()
	{

		$prevTimezone = date_default_timezone_get();

		// Set timezone as previous if no timezone exists.
		if ($this->timezone)
		{
			date_default_timezone_set($this->timezone);
		}
		else
		{
			date_default_timezone_set($prevTimezone);
		}

		// Check if published is set and if so, are they authorised.
		if ((!isset($this->published) && JEVHelper::isEventPublisher()) || JEVHelper::isEventPublisher())
		{
			$this->published = 1;
		}
		else
		{
			$this->published = 0;
		}

		$ical = "BEGIN:VEVENT\n";
		$ical .= "UID:" . $this->getUid() . "\n"
			. "CATEGORIES:" . $this->categories . "\n"
			. "SUMMARY:" . $this->summary . "\n"
			. "DTSTART" . $this->timezoneoutput() . ":" . $this->datetimeToIcsFormat($this->dtstart) . "\n";

		if ($this->dtend !== "") $ical .= "DTEND" . $this->timezoneoutput() . ":" . $this->datetimeToIcsFormat($this->dtend) . "\n";
		if ($this->dtstamp !== "") $ical .= "DTSTAMP:" . $this->datetimeToUtcIcsFormat($this->dtstamp) . "\n";
		if ($this->location !== "") $ical .= "LOCATION:" . $this->location . "\n";
		if ($this->description !== "") $ical .= "DESCRIPTION:" . $this->description . "\n";
		if ($this->contact !== "") $ical .= "CONTACT:" . $this->contact . "\n";
		if ($this->extraInfo !== "") $ical .= "X-EXTRAINFO:" . $this->extraInfo . "\n";
		if (isset($this->color) && $this->color !== "") $ical .= "X-COLOR:".$this->color."\n";
		if ($this->rrule !== "") $ical .= "RRULE:" . $this->rrule . "\n";
		if ($this->noendtime !== "") $ical .= "NOENDTIME:" . $this->noendtime . "\n";
		if ($this->published !== "") $ical .= "X-STATE:" . $this->published . "\n";
		if ($this->multiday !== "") $ical .= "MULTIDAY:" . $this->multiday . "\n";

		if (count($this->cf) > 0)
		{
			foreach ($this->cf as $key => $cf)
			{
				$ical .= "custom_" . $key . ":" . $cf . "\n";
			}
		}
		$ical .= "SEQUENCE:0\n";
		$ical .= "TRANSP:OPAQUE\n";
		$ical .= "END:VEVENT\n";

		date_default_timezone_set($prevTimezone); // set timezone back

		return $ical;
	}

	public function getUid()
	{

		if (isset($this->uid) && $this->uid != "")
		{
			return $this->uid;
		}
		else return $this->generateUid();
	}

	public function setUID($uid)
	{

		$this->uid = $uid;
	}

	/**
	 * Function generates unique UID of the event
	 *
	 * @return generated uid of the event
	 */
	private function generateUid()
	{

		return md5(uniqid(rand(), true));
	}

	private function timezoneoutput()
	{

		if ($this->timezone != "")
		{
			return ";TZID=" . $this->timezone;
		}
		else
		{
			return "";
		}
	}

	/**
	 * Function converts datetime to iCal format
	 *
	 * @param datetime Datetime of the event
	 *
	 * @return converted datetime in iCal format
	 */
	private function datetimeToIcsFormat($datetime)
	{

		$newdatetime = JevDate::strtotime($datetime);
		$tempdate    = new JevDate($newdatetime);
		if (Joomla\String\StringHelper::strlen($datetime) <= 10 && $tempdate->toFormat("%H:%M:%S") == "00:00:00")
		{
			// in this case we have not time element so don't set it otherwise iCal import will think a time is actually set and not process all day or no end time events correctly
			return date("Ymd", $newdatetime);
		}

		return date("Ymd", $newdatetime) . "T" . date("His", $newdatetime);
	}

	/**
	 * Function converts datetime to iCal format
	 *
	 * @param datetime Datetime of the event
	 *
	 * @return converted datetime in iCal format
	 */
	private function datetimeToUtcIcsFormat($datetime)
	{

		$datetime = JevDate::strtotime($datetime);

		return gmdate("Ymd", $datetime) . "T" . gmdate("His", $datetime) . "Z";
	}
}
