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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 Sabre\VObject;
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6
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7 /**
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8 * Splitter
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9 *
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10 * This class is responsible for splitting up iCalendar objects.
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11 *
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12 * This class expects a single VCALENDAR object with one or more
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13 * calendar-objects inside. Objects with identical UID's will be combined into
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14 * a single object.
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15 *
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16 * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
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17 * @author Dominik Tobschall
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18 * @author Armin Hackmann
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19 * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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20 */
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21 class ICalendar implements SplitterInterface {
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22
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23 /**
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24 * Timezones
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25 *
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26 * @var array
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27 */
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28 protected $vtimezones = array();
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29
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30 /**
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31 * iCalendar objects
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32 *
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33 * @var array
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34 */
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35 protected $objects = array();
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36
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37 /**
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38 * Constructor
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39 *
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40 * The splitter should receive an readable file stream as it's input.
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41 *
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42 * @param resource $input
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43 */
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44 public function __construct($input) {
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45
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46 $data = VObject\Reader::read(stream_get_contents($input));
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47 $vtimezones = array();
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48 $components = array();
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49
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50 foreach($data->children as $component) {
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51 if (!$component instanceof VObject\Component) {
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52 continue;
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53 }
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54
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55 // Get all timezones
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56 if ($component->name === 'VTIMEZONE') {
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57 $this->vtimezones[(string)$component->TZID] = $component;
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58 continue;
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59 }
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60
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61 // Get component UID for recurring Events search
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62 if($component->UID) {
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63 $uid = (string)$component->UID;
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64 } else {
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65 // Generating a random UID
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66 $uid = sha1(microtime()) . '-vobjectimport';
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67 }
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68
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69 // Take care of recurring events
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70 if (!array_key_exists($uid, $this->objects)) {
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71 $this->objects[$uid] = VObject\Component::create('VCALENDAR');
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72 }
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73
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74 $this->objects[$uid]->add(clone $component);
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75 }
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76
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77 }
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78
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79 /**
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80 * Every time getNext() is called, a new object will be parsed, until we
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81 * hit the end of the stream.
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82 *
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83 * When the end is reached, null will be returned.
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84 *
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85 * @return Sabre\VObject\Component|null
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86 */
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87 public function getNext() {
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88
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89 if($object=array_shift($this->objects)) {
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90
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91 // create our baseobject
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92 $object->version = '2.0';
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93 $object->prodid = '-//Sabre//Sabre VObject ' . VObject\Version::VERSION . '//EN';
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94 $object->calscale = 'GREGORIAN';
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95
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96 // add vtimezone information to obj (if we have it)
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97 foreach ($this->vtimezones as $vtimezone) {
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98 $object->add($vtimezone);
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99 }
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100
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101 return $object;
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102
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103 } else {
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104
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105 return null;
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106
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107 }
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108
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109 }
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110
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111 }
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