class.ilCalendarRecurrence.php

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<?php
/*
    +-----------------------------------------------------------------------------+
    | ILIAS open source                                                           |
    +-----------------------------------------------------------------------------+
    | Copyright (c) 1998-2006 ILIAS open source, University of Cologne            |
    |                                                                             |
    | 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 2              |
    | 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, write to the Free Software                 |
    | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
    +-----------------------------------------------------------------------------+
*/

include_once('./Services/Calendar/classes/class.ilDate.php');
include_once './Services/Calendar/classes/class.ilCalendarRecurrenceExclusions.php';
include_once './Services/Calendar/interfaces/interface.ilCalendarRecurrenceCalculation.php';

define('IL_CAL_FREQ_DAILY', 'DAILY');
define('IL_CAL_FREQ_WEEKLY', 'WEEKLY');
define('IL_CAL_FREQ_MONTHLY', 'MONTHLY');
define('IL_CAL_FREQ_YEARLY', 'YEARLY');

class ilCalendarRecurrence implements ilCalendarRecurrenceCalculation
{
    const REC_RECURRENCE = 0;
    const REC_EXCLUSION = 1;
    
    const FREQ_DAILY = 'DAILY';
    const FREQ_WEEKLY = 'WEEKLY';
    const FREQ_MONTHLY = 'MONTHLY';
    const FREQ_YEARLY = 'YEARLY';
    
    
    protected $db;
    
    private $recurrence_id;
    private $cal_id;
    private $recurrence_type;
    
    private $freq_type = '';
    private $freq_until_type;
    private $freq_until_date = null;
    private $freq_until_count;
    
    private $interval = 0;
    private $byday = '';
    private $byweekno = '';
    private $bymonth = '';
    private $bymonthday = '';
    private $byyearday = '';
    private $bysetpos = '';
    private $weekstart = '';
    
    private $exclusion_dates = array();
    
    private $timezone = 'Europe/Berlin';

    public function __construct($a_rec_id = 0)
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $this->db = $ilDB;
        $this->recurrence_id = $a_rec_id;
        if ($a_rec_id) {
            $this->read();
        }
    }
    
    public static function _delete($a_cal_id)
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $query = "DELETE FROM cal_recurrence_rules " .
            "WHERE cal_id = " . $ilDB->quote($a_cal_id, 'integer') . " ";
        $res = $ilDB->manipulate($query);
        
        ilCalendarRecurrenceExclusions::delete($a_cal_id);
    }
    
    public function toICal($a_user_id)
    {
        include_once './Services/Calendar/classes/class.ilCalendarEntry.php';
        $entry = new ilCalendarEntry($this->getEntryId());

        if (!$this->getFrequenceType()) {
            return '';
        }

        $ical = 'RRULE:';
        $ical .= ('FREQ=' . $this->getFrequenceType());
        
        if ($this->getInterval()) {
            $ical .= (';INTERVAL=' . $this->getInterval());
        }
        if ($this->getFrequenceUntilCount()) {
            $ical .= (';COUNT=' . $this->getFrequenceUntilCount());
        } elseif ($this->getFrequenceUntilDate()) {
            if ($entry->isFullday()) {
                $ical .= (';UNTIL=' . $this->getFrequenceUntilDate()->get(IL_CAL_FKT_DATE, 'Ymd'));
            } else {
                $his = $entry->getStart()->get(IL_CAL_FKT_DATE, 'His');
                $ical .= (';UNTIL=' . $this->getFrequenceUntilDate()->get(IL_CAL_FKT_DATE, 'Ymd') . 'T' . $his);
            }
        }
        if ($this->getBYMONTH()) {
            $ical .= (';BYMONTH=' . $this->getBYMONTH());
        }
        if ($this->getBYWEEKNO()) {
            $ical .= (';BYWEEKNO=' . $this->getBYWEEKNO());
        }
        if ($this->getBYYEARDAY()) {
            $ical .= (';BYYEARDAY=' . $this->getBYYEARDAY());
        }
        if ($this->getBYMONTHDAY()) {
            $ical .= (';BYMONTHDAY=' . $this->getBYMONTHDAY());
        }
        if ($this->getBYDAY()) {
            $ical .= (';BYDAY=' . $this->getBYDAY());
        }
        if ($this->getBYSETPOS()) {
            $ical .= (';BYSETPOS=' . $this->getBYSETPOS());
        }

        // Required in outlook
        if ($this->getBYDAY()) {
            include_once './Services/Calendar/classes/class.ilCalendarUserSettings.php';
            include_once './Services/Calendar/classes/class.ilCalendarSettings.php';
            $us = ilCalendarUserSettings::_getInstanceByUserId($a_user_id);
            if ($us->getWeekStart() == ilCalendarSettings::WEEK_START_MONDAY) {
                $ical .= (';WKST=MO');
            } else {
                $ical .= (';WKST=SU');
            }
        }

        return $ical;
    }
    
    
    public function reset()
    {
        $this->setBYDAY('');
        $this->setBYMONTHDAY('');
        $this->setBYMONTH('');
        $this->setBYSETPOS('');
        $this->setBYWEEKNO('');
        $this->setBYYEARDAY('');
        $this->setFrequenceType('');
        $this->setInterval(1);
        $this->setFrequenceUntilCount(0);
        
        return true;
    }
    
    public function getRecurrenceId()
    {
        return $this->recurrence_id;
    }
    
    
    public function setEntryId($a_id)
    {
        $this->cal_id = $a_id;
    }
    
    public function getEntryId()
    {
        return $this->cal_id;
    }
    
    public function setRecurrence($a_type)
    {
        $this->recurrence_type = $a_type;
    }
    
    public function isRecurrence()
    {
        return $this->recurrence_type == self::REC_RECURRENCE;
    }
    
    public function setFrequenceType($a_type)
    {
        $this->freq_type = $a_type;
    }
    
    public function getFrequenceType()
    {
        return $this->freq_type;
    }
    
    public function getFrequenceUntilDate()
    {
        return is_object($this->freq_until_date) ? $this->freq_until_date : null;
    }
    
    public function setFrequenceUntilDate(ilDateTime $a_date = null)
    {
        $this->freq_until_date = $a_date;
    }
    
    public function setFrequenceUntilCount($a_count)
    {
        $this->freq_until_count = $a_count;
    }
    
    public function getFrequenceUntilCount()
    {
        return $this->freq_until_count;
    }
    
    public function setInterval($a_interval)
    {
        $this->interval = $a_interval;
    }
    
    public function getInterval()
    {
        return $this->interval ? $this->interval : 1;
    }
    
    public function setBYDAY($a_byday)
    {
        $this->byday = $a_byday;
    }
    
    public function getBYDAY()
    {
        return $this->byday;
    }
    
    public function getBYDAYList()
    {
        if (!trim($this->getBYDAY())) {
            return array();
        }
        foreach (explode(',', $this->getBYDAY()) as $byday) {
            $bydays[] = trim($byday);
        }
        return $bydays ? $bydays : array();
    }
    
    public function setBYWEEKNO($a_byweekno)
    {
        $this->byweekno = $a_byweekno;
    }
    
    public function getBYWEEKNOList()
    {
        if (!trim($this->getBYWEEKNO())) {
            return array();
        }
        foreach (explode(',', $this->getBYWEEKNO()) as $week_num) {
            $weeks[] = (int) $week_num;
        }
        return $weeks ? $weeks : array();
    }
    
    
    public function getBYWEEKNO()
    {
        return $this->byweekno;
    }
    
    public function setBYMONTH($a_by)
    {
        $this->bymonth = $a_by;
    }
    
    public function getBYMONTH()
    {
        return $this->bymonth;
    }
    
    public function getBYMONTHList()
    {
        if (!trim($this->getBYMONTH())) {
            return array();
        }
        foreach (explode(',', $this->getBYMONTH()) as $month_num) {
            $months[] = (int) $month_num;
        }
        return $months ? $months : array();
    }
    
    public function setBYMONTHDAY($a_by)
    {
        $this->bymonthday = $a_by;
    }
    
    public function getBYMONTHDAY()
    {
        return $this->bymonthday;
    }
    
    public function getBYMONTHDAYList()
    {
        if (!trim($this->getBYMONTHDAY())) {
            return array();
        }
        foreach (explode(',', $this->getBYMONTHDAY()) as $month_num) {
            $months[] = (int) $month_num;
        }
        return $months ? $months : array();
    }
    
    
    public function setBYYEARDAY($a_by)
    {
        $this->byyearday = $a_by;
    }
    
    public function getBYYEARDAY()
    {
        return $this->byyearday;
    }
    
    public function getBYYEARDAYList()
    {
        if (!trim($this->getBYYEARDAY())) {
            return array();
        }
        foreach (explode(',', $this->getBYYEARDAY()) as $year_day) {
            $days[] = (int) $year_day;
        }
        return $days ? $days : array();
    }
    
    public function setBYSETPOS($a_by)
    {
        $this->bysetpos = $a_by;
    }
    
    public function getBYSETPOS()
    {
        return $this->bysetpos;
    }
    
    public function getBYSETPOSList()
    {
        if (!trim($this->getBYSETPOS())) {
            return array();
        }
        foreach (explode(',', $this->getBYSETPOS()) as $pos) {
            $positions[] = (int) $pos;
        }
        return $positions ? $positions : array();
    }
    
    
    public function setWeekstart($a_start)
    {
        $this->weekstart = $a_start;
    }
    
    public function getWeekstart()
    {
        return $this->weekstart;
    }
    
    public function getTimeZone()
    {
        return $this->timezone;
    }
    
    public function setTimeZone($a_tz)
    {
        $this->timezone = $a_tz;
    }
    
    public function getExclusionDates()
    {
        return (array) $this->exclusion_dates;
    }
    
    public function validate()
    {
        $valid_frequences = array(IL_CAL_FREQ_DAILY,IL_CAL_FREQ_WEEKLY,IL_CAL_FREQ_MONTHLY,IL_CAL_FREQ_YEARLY);
        if (!in_array($this->getFrequenceType(), $valid_frequences)) {
            return false;
        }
        if ($this->getFrequenceUntilCount() < 0) {
            return false;
        }
        if ($this->getInterval() <= 0) {
            return false;
        }
        return true;
    }
    
    
    public function save()
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];

        $until_date = is_null($this->getFrequenceUntilDate()) ?
            null :
            $this->getFrequenceUntilDate()->get(IL_CAL_DATETIME, '', 'UTC');
        $next_id = $ilDB->nextId('cal_recurrence_rules');
        
        $query = "INSERT INTO cal_recurrence_rules (rule_id,cal_id,cal_recurrence,freq_type,freq_until_date,freq_until_count,intervall, " .
            "byday,byweekno,bymonth,bymonthday,byyearday,bysetpos,weekstart) " .
            "VALUES( " .
            $ilDB->quote($next_id, 'integer') . ", " .
            $this->db->quote($this->cal_id, 'integer') . ", " .
            $ilDB->quote(1, 'integer') . ", " .
            $ilDB->quote((string) $this->getFrequenceType(), 'text') . ", " .
            $this->db->quote($until_date, 'timestamp') . ", " .
            $this->db->quote((int) $this->getFrequenceUntilCount(), 'integer') . ", " .
            $this->db->quote((int) $this->getInterval(), 'integer') . ", " .
            $this->db->quote((string) $this->getBYDAY(), 'text') . ", " .
            $this->db->quote((string) $this->getBYWEEKNO(), 'text') . ", " .
            $this->db->quote((string) $this->getBYMONTH(), 'text') . ", " .
            $this->db->quote((string) $this->getBYMONTHDAY(), 'text') . ", " .
            $this->db->quote((string) $this->getBYYEARDAY(), 'text') . ", " .
            $this->db->quote((string) $this->getBYSETPOS(), 'text') . ", " .
            $this->db->quote((string) $this->getWeekstart(), 'text') . " " .
            ")";
        $res = $ilDB->manipulate($query);
        $this->recurrence_id = $next_id;
        return true;
    }
    
    public function update()
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $until_date = is_null($this->getFrequenceUntilDate()) ?
            null :
            $this->getFrequenceUntilDate()->get(IL_CAL_DATETIME, '', 'UTC');

        $query = "UPDATE cal_recurrence_rules SET " .
            "cal_id = " . $this->db->quote($this->cal_id, 'integer') . ", " .
            "cal_recurrence = 1," .
            "freq_type = " . $this->db->quote($this->getFrequenceType(), 'text') . ", " .
            "freq_until_date = " . $this->db->quote($until_date, 'timestamp') . ", " .
            "freq_until_count = " . $this->db->quote($this->getFrequenceUntilCount(), 'integer') . ", " .
            "intervall = " . $this->db->quote($this->getInterval(), 'integer') . ", " .
            "byday = " . $this->db->quote($this->getBYDAY(), 'text') . ", " .
            "byweekno = " . $this->db->quote($this->getBYWEEKNO(), 'text') . ", " .
            "bymonth = " . $this->db->quote($this->getBYMONTH(), 'text') . ", " .
            "bymonthday = " . $this->db->quote($this->getBYMONTHDAY(), 'text') . ", " .
            "byyearday = " . $this->db->quote($this->getBYYEARDAY(), 'text') . ", " .
            "bysetpos = " . $this->db->quote($this->getBYSETPOS(), 'text') . ", " .
            "weekstart = " . $this->db->quote($this->getWeekstart(), 'text') . " " .
            "WHERE rule_id = " . $this->db->quote($this->recurrence_id, 'integer') . " ";
        $res = $ilDB->manipulate($query);
        return true;
    }
    
    public function delete()
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $query = "DELETE FROM cal_recurrence_rules " .
            "WHERE rule_id = " . $this->db->quote($this->recurrence_id, 'integer');
        $res = $ilDB->manipulate($query);
        return true;
    }

    private function read()
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $query = "SELECT * FROM cal_recurrence_rules " .
            "WHERE rule_id = " . $this->db->quote($this->recurrence_id, 'integer') . " ";
        $res = $this->db->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $this->cal_id = $row->cal_id;
            $this->recurrence_type = $row->cal_recurrence;
            $this->freq_type = $row->freq_type;
            
            if ($row->freq_until_date != null) {
                $this->freq_until_date = new ilDateTime($row->freq_until_date, IL_CAL_DATETIME, 'UTC');
            }
            $this->freq_until_count = $row->freq_until_count;
            $this->interval = $row->intervall;
            $this->byday = $row->byday;
            $this->byweekno = $row->byweekno;
            $this->bymonth = $row->bymonth;
            $this->bymonthday = $row->bymonthday;
            $this->byyearday = $row->byyearday;
            $this->bysetpos = $row->bysetpos;
            $this->weekstart = $row->week_start;
        }
        
        $this->exclusion_dates = ilCalendarRecurrenceExclusions::getExclusionDates($this->cal_id);
    }
}