<?php
/* Copyright (C) 2018	Destailleur Laurent	<eldy@users.sourceforge.net>
 * Copyright (C) 2024       Frédéric France             <frederic.france@free.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

/**
 *      \file       htdocs/dav/dav.class.php
 *      \ingroup    dav
 *      \brief      Server DAV
 */


/**
 * Define Common function to access calendar items and format it in vCalendar
 */
class CdavLib
{
	/**
	 * @var DoliDB
	 */
	private $db;

	/**
	 * @var User
	 */
	private $user;

	/**
	 * @var Translate
	 */
	private $langs; // @phpstan-ignore-line

	/**
	 * Constructor
	 *
	 * @param   User        $user   user
	 * @param   DoliDB      $db     Database handler
	 * @param   Translate   $langs  translation
	 */
	public function __construct($user, $db, $langs)
	{
		$this->user = $user;
		$this->db = $db;
		$this->langs = $langs;
	}

	/**
	 * Base sql request for calendar events
	 *
	 * @param 	int 		$calid 			Calendard id
	 * @param 	int|boolean	$oid			Oid
	 * @param	int|boolean	$ouri			Ouri
	 * @return string
	 */
	public function getSqlCalEvents($calid, $oid = false, $ouri = false)
	{
		// TODO : replace GROUP_CONCAT by
		$sql = 'SELECT
					a.tms AS lastupd,
					a.*,
					sp.firstname,
					sp.lastname,
					sp.address,
					sp.zip,
					sp.town,
					co.label country_label,
					sp.phone,
					sp.phone_perso,
					sp.phone_mobile,
					s.nom AS soc_nom,
					s.address soc_address,
					s.zip soc_zip,
					s.town soc_town,
					cos.label soc_country_label,
					s.phone soc_phone,
					ac.sourceuid,
					(SELECT GROUP_CONCAT(u.login) FROM '.MAIN_DB_PREFIX.'actioncomm_resources ar
						LEFT OUTER JOIN '.MAIN_DB_PREFIX.'user AS u ON (u.rowid=fk_element)
						WHERE ar.element_type=\'user\' AND fk_actioncomm=a.id) AS other_users
				FROM '.MAIN_DB_PREFIX.'actioncomm AS a';
		$sql .= " LEFT JOIN '.MAIN_DB_PREFIX.'c_country as co ON co.rowid = sp.fk_pays
				LEFT JOIN '.MAIN_DB_PREFIX.'c_country as cos ON cos.rowid = s.fk_pays
				WHERE 	a.id IN (SELECT ar.fk_actioncomm FROM '.MAIN_DB_PREFIX.'actioncomm_resources ar WHERE ar.element_type='user' AND ar.fk_element=".((int) $calid).")
						AND a.code IN (SELECT cac.code FROM '.MAIN_DB_PREFIX.'c_actioncomm cac WHERE cac.type <> 'systemauto')
						AND a.entity IN (".getEntity('societe', 1).")";
		// TODO Restrict on external users
		if ($oid !== false) {
			if ($ouri === false) {
				$sql .= ' AND a.id = '.((int) $oid);
			} else {
				$sql .= ' AND (a.id = '.((int) $oid)." OR ac.uuidext = '".$this->db->escape($ouri)."')";
			}
		}

		return $sql;
	}

	/**
	 * Convert calendar row to VCalendar string
	 *
	 * @param 	int		$calid		Calendar id
	 * @param	Object	$obj		Object id
	 * @return string
	 */
	public function toVCalendar($calid, $obj)
	{
		/*$categ = array();
		if($obj->soc_client)
		{
			$nick[] = $obj->soc_code_client;
			$categ[] = $this->langs->transnoentitiesnoconv('Customer');
		}*/

		$location = $obj->location;

		// contact address
		if (empty($location) && !empty($obj->address)) {
			$location = trim(str_replace(array("\r", "\t", "\n"), ' ', $obj->address));
			$location = trim($location.', '.$obj->zip);
			$location = trim($location.' '.$obj->town);
			$location = trim($location.', '.$obj->country_label);
		}

		// contact address
		if (empty($location) && !empty($obj->soc_address)) {
			$location = trim(str_replace(array("\r", "\t", "\n"), ' ', $obj->soc_address));
			$location = trim($location.', '.$obj->soc_zip);
			$location = trim($location.' '.$obj->soc_town);
			$location = trim($location.', '.$obj->soc_country_label);
		}

		/*
		$address = explode("\n", $obj->address, 2);
		foreach ($address as $kAddr => $vAddr) {
			$address[$kAddr] = trim(str_replace(array("\r", "\t"), ' ', str_replace("\n", ' | ', trim($vAddr))));
		}
		$address[] = '';
		$address[] = '';
		*/

		if ($obj->percent == -1 && trim($obj->datep) != '') {
			$type = 'VEVENT';
		} else {
			$type = 'VTODO';
		}

		$timezone = date_default_timezone_get();

		$caldata = "BEGIN:VCALENDAR\n";
		$caldata .= "VERSION:2.0\n";
		$caldata .= "METHOD:PUBLISH\n";
		$caldata .= "PRODID:-//Dolibarr CDav//FR\n";
		$caldata .= "BEGIN:".$type."\n";
		$caldata .= "CREATED:".gmdate('Ymd\THis', strtotime($obj->datec))."Z\n";
		$caldata .= "LAST-MODIFIED:".gmdate('Ymd\THis', strtotime($obj->lastupd))."Z\n";
		$caldata .= "DTSTAMP:".gmdate('Ymd\THis', strtotime($obj->lastupd))."Z\n";
		if ($obj->sourceuid == '') {
			$caldata .= "UID:".$obj->id.'-ev-'.$calid.'-cal-'.constant('CDAV_URI_KEY')."\n";
		} else {
			$caldata .= "UID:".$obj->sourceuid."\n";
		}
		$caldata .= "SUMMARY:".$obj->label."\n";
		$caldata .= "LOCATION:".$location."\n";
		$caldata .= "PRIORITY:".$obj->priority."\n";
		if ($obj->fulldayevent) {
			$caldata .= "DTSTART;VALUE=DATE:".date('Ymd', strtotime($obj->datep))."\n";
			if ($type == 'VEVENT') {
				if (trim($obj->datep2) != '') {
					$caldata .= "DTEND;VALUE=DATE:".date('Ymd', strtotime($obj->datep2) + 1)."\n";
				} else {
					$caldata .= "DTEND;VALUE=DATE:".date('Ymd', strtotime($obj->datep) + (25 * 3600))."\n";
				}
			} elseif (trim($obj->datep2) != '') {
				$caldata .= "DUE;VALUE=DATE:".date('Ymd', strtotime($obj->datep2) + 1)."\n";
			}
		} else {
			$caldata .= "DTSTART;TZID=".$timezone.":".strtr($obj->datep, array(" "=>"T", ":"=>"", "-"=>""))."\n";
			if ($type == 'VEVENT') {
				if (trim($obj->datep2) != '') {
					$caldata .= "DTEND;TZID=".$timezone.":".strtr($obj->datep2, array(" "=>"T", ":"=>"", "-"=>""))."\n";
				} else {
					$caldata .= "DTEND;TZID=".$timezone.":".strtr($obj->datep, array(" "=>"T", ":"=>"", "-"=>""))."\n";
				}
			} elseif (trim($obj->datep2) != '') {
				$caldata .= "DUE;TZID=".$timezone.":".strtr($obj->datep2, array(" "=>"T", ":"=>"", "-"=>""))."\n";
			}
		}
		$caldata .= "CLASS:PUBLIC\n";
		if ($obj->transparency == 1) {
			$caldata .= "TRANSP:TRANSPARENT\n";
		} else {
			$caldata .= "TRANSP:OPAQUE\n";
		}

		if ($type == 'VEVENT') {
			$caldata .= "STATUS:CONFIRMED\n";
		} elseif ($obj->percent == 0) {
			$caldata .= "STATUS:NEEDS-ACTION\n";
		} elseif ($obj->percent == 100) {
			$caldata .= "STATUS:COMPLETED\n";
		} else {
			$caldata .= "STATUS:IN-PROCESS\n";
			$caldata .= "PERCENT-COMPLETE:".$obj->percent."\n";
		}

		$caldata .= "DESCRIPTION:";
		$caldata .= strtr($obj->note, array("\n"=>"\\n", "\r"=>""));
		if (!empty($obj->soc_nom)) {
			$caldata .= "\\n*DOLIBARR-SOC: ".$obj->soc_nom;
		}
		if (!empty($obj->soc_phone)) {
			$caldata .= "\\n*DOLIBARR-SOC-TEL: ".$obj->soc_phone;
		}
		if (!empty($obj->firstname) || !empty($obj->lastname)) {
			$caldata .= "\\n*DOLIBARR-CTC: ".trim($obj->firstname.' '.$obj->lastname);
		}
		if (!empty($obj->phone) || !empty($obj->phone_perso) || !empty($obj->phone_mobile)) {
			$caldata .= "\\n*DOLIBARR-CTC-TEL: ".trim($obj->phone.' '.$obj->phone_perso.' '.$obj->phone_mobile);
		}
		if (strpos($obj->other_users, ',')) { // several
			$caldata .= "\\n*DOLIBARR-USR: ".$obj->other_users;
		}
		$caldata .= "\n";

		$caldata .= "END:".$type."\n";
		$caldata .= "END:VCALENDAR\n";

		return $caldata;
	}

	/**
	 * getFullCalendarObjects
	 *
	 * @param int	 	$calendarId			Calendar id
	 * @param int		$bCalendarData		Add calendar data
	 * @return array|string[][]
	 */
	public function getFullCalendarObjects($calendarId, $bCalendarData)
	{
		$calid = (int) $calendarId;
		$calevents = array();

		if (!$this->user->rights->agenda->myactions->read) {
			return $calevents;
		}

		if ($calid != $this->user->id && (!isset($this->user->rights->agenda->allactions->read) || !$this->user->rights->agenda->allactions->read)) {
			return $calevents;
		}

		$sql = $this->getSqlCalEvents($calid);

		$result = $this->db->query($sql);

		if ($result) {
			while ($obj = $this->db->fetch_object($result)) {
				$calendardata = $this->toVCalendar($calid, $obj);

				if ($bCalendarData) {
					$calevents[] = array(
						'calendardata' => $calendardata,
						'uri' => $obj->id.'-ev-'.constant('CDAV_URI_KEY'),
						'lastmodified' => strtotime($obj->lastupd),
						'etag' => '"'.md5($calendardata).'"',
						'calendarid'   => $calendarId,
						'size' => strlen($calendardata),
						'component' => strpos($calendardata, 'BEGIN:VEVENT') > 0 ? 'vevent' : 'vtodo',
					);
				} else {
					$calevents[] = array(
						// 'calendardata' => $calendardata,  not necessary because etag+size are present
						'uri' => $obj->id.'-ev-'.constant('CDAV_URI_KEY'),
						'lastmodified' => strtotime($obj->lastupd),
						'etag' => '"'.md5($calendardata).'"',
						'calendarid'   => $calendarId,
						'size' => strlen($calendardata),
						'component' => strpos($calendardata, 'BEGIN:VEVENT') > 0 ? 'vevent' : 'vtodo',
					);
				}
			}
		}
		return $calevents;
	}
}