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1 <?php
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2
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3 namespace Sabre\VObject\Component;
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4
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5 use Sabre\VObject;
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6
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7 /**
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8 * The VFreeBusy component
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9 *
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10 * This component adds functionality to a component, specific for VFREEBUSY
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11 * components.
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12 *
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13 * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
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14 * @author Evert Pot (http://evertpot.com/)
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15 * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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16 */
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17 class VFreeBusy extends VObject\Component {
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18
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19 /**
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20 * Checks based on the contained FREEBUSY information, if a timeslot is
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21 * available.
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22 *
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23 * @param DateTime $start
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24 * @param Datetime $end
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25 * @return bool
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26 */
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27 public function isFree(\DateTime $start, \Datetime $end) {
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28
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29 foreach($this->select('FREEBUSY') as $freebusy) {
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30
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31 // We are only interested in FBTYPE=BUSY (the default),
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32 // FBTYPE=BUSY-TENTATIVE or FBTYPE=BUSY-UNAVAILABLE.
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33 if (isset($freebusy['FBTYPE']) && strtoupper(substr((string)$freebusy['FBTYPE'],0,4))!=='BUSY') {
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34 continue;
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35 }
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36
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37 // The freebusy component can hold more than 1 value, separated by
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38 // commas.
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39 $periods = explode(',', (string)$freebusy);
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40
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41 foreach($periods as $period) {
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42 // Every period is formatted as [start]/[end]. The start is an
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43 // absolute UTC time, the end may be an absolute UTC time, or
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44 // duration (relative) value.
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45 list($busyStart, $busyEnd) = explode('/', $period);
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46
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47 $busyStart = VObject\DateTimeParser::parse($busyStart);
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48 $busyEnd = VObject\DateTimeParser::parse($busyEnd);
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49 if ($busyEnd instanceof \DateInterval) {
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50 $tmp = clone $busyStart;
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51 $tmp->add($busyEnd);
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52 $busyEnd = $tmp;
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53 }
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54
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55 if($start < $busyEnd && $end > $busyStart) {
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56 return false;
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57 }
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58
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59 }
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60
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61 }
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62
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63 return true;
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64
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65 }
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66
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67 }
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68
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