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1 <?php
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2
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3 namespace Sabre\VObject\Splitter;
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4
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5 use
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6 Sabre\VObject,
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7 Sabre\VObject\Component\VCalendar;
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8
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9 /**
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10 * Splitter
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11 *
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12 * This class is responsible for splitting up iCalendar objects.
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13 *
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14 * This class expects a single VCALENDAR object with one or more
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15 * calendar-objects inside. Objects with identical UID's will be combined into
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16 * a single object.
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17 *
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18 * @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
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19 * @author Dominik Tobschall
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20 * @author Armin Hackmann
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21 * @license http://sabre.io/license/ Modified BSD License
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22 */
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23 class ICalendar implements SplitterInterface {
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24
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25 /**
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26 * Timezones
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27 *
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28 * @var array
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29 */
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30 protected $vtimezones = array();
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31
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32 /**
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33 * iCalendar objects
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34 *
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35 * @var array
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36 */
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37 protected $objects = array();
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38
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39 /**
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40 * Constructor
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41 *
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42 * The splitter should receive an readable file stream as it's input.
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43 *
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44 * @param resource $input
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45 * @param int $options Parser options, see the OPTIONS constants.
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46 */
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47 public function __construct($input, $options = 0) {
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48
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49 $data = VObject\Reader::read($input, $options);
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50 $vtimezones = array();
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51 $components = array();
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52
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53 if (!$data instanceof VObject\Component\VCalendar) {
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54 throw new VObject\ParseException('Supplied input could not be parsed as VCALENDAR.');
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55 }
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56
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57 foreach($data->children() as $component) {
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58 if (!$component instanceof VObject\Component) {
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59 continue;
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60 }
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61
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62 // Get all timezones
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63 if ($component->name === 'VTIMEZONE') {
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64 $this->vtimezones[(string)$component->TZID] = $component;
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65 continue;
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66 }
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67
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68 // Get component UID for recurring Events search
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69 if(!$component->UID) {
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70 $component->UID = sha1(microtime()) . '-vobjectimport';
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71 }
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72 $uid = (string)$component->UID;
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73
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74 // Take care of recurring events
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75 if (!array_key_exists($uid, $this->objects)) {
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76 $this->objects[$uid] = new VCalendar();
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77 }
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78
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79 $this->objects[$uid]->add(clone $component);
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80 }
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81
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82 }
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83
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84 /**
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85 * Every time getNext() is called, a new object will be parsed, until we
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86 * hit the end of the stream.
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87 *
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88 * When the end is reached, null will be returned.
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89 *
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90 * @return Sabre\VObject\Component|null
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91 */
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92 public function getNext() {
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93
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94 if($object=array_shift($this->objects)) {
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95
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96 // create our baseobject
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97 $object->version = '2.0';
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98 $object->prodid = '-//Sabre//Sabre VObject ' . VObject\Version::VERSION . '//EN';
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99 $object->calscale = 'GREGORIAN';
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100
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101 // add vtimezone information to obj (if we have it)
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102 foreach ($this->vtimezones as $vtimezone) {
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103 $object->add($vtimezone);
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104 }
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105
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106 return $object;
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107
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108 } else {
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109
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110 return null;
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111
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112 }
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113
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114 }
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115
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116 }
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