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1 <?php
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2
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3 require_once realpath(__DIR__ . '/../../libcalendaring/lib/libcalendaring_recurrence.php');
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4
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5 /**
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6 * Recurrence computation class for the Calendar plugin
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7 *
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8 * Uitility class to compute instances of recurring events.
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9 *
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10 * @author Thomas Bruederli <bruederli@kolabsys.com>
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11 *
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12 * Copyright (C) 2012-2014, Kolab Systems AG <contact@kolabsys.com>
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13 *
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14 * This program is free software: you can redistribute it and/or modify
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15 * it under the terms of the GNU Affero General Public License as
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16 * published by the Free Software Foundation, either version 3 of the
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17 * License, or (at your option) any later version.
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18 *
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19 * This program is distributed in the hope that it will be useful,
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20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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22 * GNU Affero General Public License for more details.
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23 *
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24 * You should have received a copy of the GNU Affero General Public License
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25 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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26 */
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27 class calendar_recurrence extends libcalendaring_recurrence
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28 {
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29 private $event;
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30 private $duration;
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31
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32 /**
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33 * Default constructor
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34 *
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35 * @param object calendar The calendar plugin instance
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36 * @param array The event object to operate on
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37 */
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38 function __construct($cal, $event)
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39 {
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40 parent::__construct($cal->lib);
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41
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42 $this->event = $event;
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43
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44 if (is_object($event['start']) && is_object($event['end']))
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45 $this->duration = $event['start']->diff($event['end']);
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46
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47 $event['start']->_dateonly |= $event['allday'];
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48 $this->init($event['recurrence'], $event['start']);
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49 }
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50
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51 /**
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52 * Alias of libcalendaring_recurrence::next()
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53 *
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54 * @return mixed DateTime object or False if recurrence ended
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55 */
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56 public function next_start()
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57 {
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58 return $this->next();
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59 }
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60
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61 /**
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62 * Get the next recurring instance of this event
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63 *
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64 * @return mixed Array with event properties or False if recurrence ended
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65 */
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66 public function next_instance()
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67 {
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68 if ($next_start = $this->next()) {
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69 $next = $this->event;
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70 $next['start'] = $next_start;
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71
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72 if ($this->duration) {
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73 $next['end'] = clone $next_start;
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74 $next['end']->add($this->duration);
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75 }
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76
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77 $next['recurrence_date'] = clone $next_start;
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78 $next['_instance'] = libcalendaring::recurrence_instance_identifier($next, $this->event['allday']);
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79
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80 unset($next['_formatobj']);
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81
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82 return $next;
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83 }
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84
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85 return false;
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86 }
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87
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88 }
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