aboutsummaryrefslogtreecommitdiffstats
path: root/vendor/sabre/vobject/lib/Component/VCalendar.php
blob: 4db318135717309347eef8af808e42e3de5e4b08 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
<?php

namespace Sabre\VObject\Component;

use DateTimeInterface;
use DateTimeZone;
use Sabre\VObject;
use Sabre\VObject\Component;
use Sabre\VObject\InvalidDataException;
use Sabre\VObject\Property;
use Sabre\VObject\Recur\EventIterator;
use Sabre\VObject\Recur\NoInstancesException;

/**
 * The VCalendar component.
 *
 * This component adds functionality to a component, specific for a VCALENDAR.
 *
 * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
 * @author Evert Pot (http://evertpot.com/)
 * @license http://sabre.io/license/ Modified BSD License
 */
class VCalendar extends VObject\Document
{
    /**
     * The default name for this component.
     *
     * This should be 'VCALENDAR' or 'VCARD'.
     *
     * @var string
     */
    public static $defaultName = 'VCALENDAR';

    /**
     * This is a list of components, and which classes they should map to.
     *
     * @var array
     */
    public static $componentMap = [
        'VCALENDAR' => self::class,
        'VALARM' => VAlarm::class,
        'VEVENT' => VEvent::class,
        'VFREEBUSY' => VFreeBusy::class,
        'VAVAILABILITY' => VAvailability::class,
        'AVAILABLE' => Available::class,
        'VJOURNAL' => VJournal::class,
        'VTIMEZONE' => VTimeZone::class,
        'VTODO' => VTodo::class,
    ];

    /**
     * List of value-types, and which classes they map to.
     *
     * @var array
     */
    public static $valueMap = [
        'BINARY' => VObject\Property\Binary::class,
        'BOOLEAN' => VObject\Property\Boolean::class,
        'CAL-ADDRESS' => VObject\Property\ICalendar\CalAddress::class,
        'DATE' => VObject\Property\ICalendar\Date::class,
        'DATE-TIME' => VObject\Property\ICalendar\DateTime::class,
        'DURATION' => VObject\Property\ICalendar\Duration::class,
        'FLOAT' => VObject\Property\FloatValue::class,
        'INTEGER' => VObject\Property\IntegerValue::class,
        'PERIOD' => VObject\Property\ICalendar\Period::class,
        'RECUR' => VObject\Property\ICalendar\Recur::class,
        'TEXT' => VObject\Property\Text::class,
        'TIME' => VObject\Property\Time::class,
        'UNKNOWN' => VObject\Property\Unknown::class, // jCard / jCal-only.
        'URI' => VObject\Property\Uri::class,
        'UTC-OFFSET' => VObject\Property\UtcOffset::class,
    ];

    /**
     * List of properties, and which classes they map to.
     *
     * @var array
     */
    public static $propertyMap = [
        // Calendar properties
        'CALSCALE' => VObject\Property\FlatText::class,
        'METHOD' => VObject\Property\FlatText::class,
        'PRODID' => VObject\Property\FlatText::class,
        'VERSION' => VObject\Property\FlatText::class,

        // Component properties
        'ATTACH' => VObject\Property\Uri::class,
        'CATEGORIES' => VObject\Property\Text::class,
        'CLASS' => VObject\Property\FlatText::class,
        'COMMENT' => VObject\Property\FlatText::class,
        'DESCRIPTION' => VObject\Property\FlatText::class,
        'GEO' => VObject\Property\FloatValue::class,
        'LOCATION' => VObject\Property\FlatText::class,
        'PERCENT-COMPLETE' => VObject\Property\IntegerValue::class,
        'PRIORITY' => VObject\Property\IntegerValue::class,
        'RESOURCES' => VObject\Property\Text::class,
        'STATUS' => VObject\Property\FlatText::class,
        'SUMMARY' => VObject\Property\FlatText::class,

        // Date and Time Component Properties
        'COMPLETED' => VObject\Property\ICalendar\DateTime::class,
        'DTEND' => VObject\Property\ICalendar\DateTime::class,
        'DUE' => VObject\Property\ICalendar\DateTime::class,
        'DTSTART' => VObject\Property\ICalendar\DateTime::class,
        'DURATION' => VObject\Property\ICalendar\Duration::class,
        'FREEBUSY' => VObject\Property\ICalendar\Period::class,
        'TRANSP' => VObject\Property\FlatText::class,

        // Time Zone Component Properties
        'TZID' => VObject\Property\FlatText::class,
        'TZNAME' => VObject\Property\FlatText::class,
        'TZOFFSETFROM' => VObject\Property\UtcOffset::class,
        'TZOFFSETTO' => VObject\Property\UtcOffset::class,
        'TZURL' => VObject\Property\Uri::class,

        // Relationship Component Properties
        'ATTENDEE' => VObject\Property\ICalendar\CalAddress::class,
        'CONTACT' => VObject\Property\FlatText::class,
        'ORGANIZER' => VObject\Property\ICalendar\CalAddress::class,
        'RECURRENCE-ID' => VObject\Property\ICalendar\DateTime::class,
        'RELATED-TO' => VObject\Property\FlatText::class,
        'URL' => VObject\Property\Uri::class,
        'UID' => VObject\Property\FlatText::class,

        // Recurrence Component Properties
        'EXDATE' => VObject\Property\ICalendar\DateTime::class,
        'RDATE' => VObject\Property\ICalendar\DateTime::class,
        'RRULE' => VObject\Property\ICalendar\Recur::class,
        'EXRULE' => VObject\Property\ICalendar\Recur::class, // Deprecated since rfc5545

        // Alarm Component Properties
        'ACTION' => VObject\Property\FlatText::class,
        'REPEAT' => VObject\Property\IntegerValue::class,
        'TRIGGER' => VObject\Property\ICalendar\Duration::class,

        // Change Management Component Properties
        'CREATED' => VObject\Property\ICalendar\DateTime::class,
        'DTSTAMP' => VObject\Property\ICalendar\DateTime::class,
        'LAST-MODIFIED' => VObject\Property\ICalendar\DateTime::class,
        'SEQUENCE' => VObject\Property\IntegerValue::class,

        // Request Status
        'REQUEST-STATUS' => VObject\Property\Text::class,

        // Additions from draft-daboo-valarm-extensions-04
        'ALARM-AGENT' => VObject\Property\Text::class,
        'ACKNOWLEDGED' => VObject\Property\ICalendar\DateTime::class,
        'PROXIMITY' => VObject\Property\Text::class,
        'DEFAULT-ALARM' => VObject\Property\Boolean::class,

        // Additions from draft-daboo-calendar-availability-05
        'BUSYTYPE' => VObject\Property\Text::class,
    ];

    /**
     * Returns the current document type.
     *
     * @return int
     */
    public function getDocumentType()
    {
        return self::ICALENDAR20;
    }

    /**
     * Returns a list of all 'base components'. For instance, if an Event has
     * a recurrence rule, and one instance is overridden, the overridden event
     * will have the same UID, but will be excluded from this list.
     *
     * VTIMEZONE components will always be excluded.
     *
     * @param string $componentName filter by component name
     *
     * @return VObject\Component[]
     */
    public function getBaseComponents($componentName = null)
    {
        $isBaseComponent = function ($component) {
            if (!$component instanceof VObject\Component) {
                return false;
            }
            if ('VTIMEZONE' === $component->name) {
                return false;
            }
            if (isset($component->{'RECURRENCE-ID'})) {
                return false;
            }

            return true;
        };

        if ($componentName) {
            // Early exit
            return array_filter(
                $this->select($componentName),
                $isBaseComponent
            );
        }

        $components = [];
        foreach ($this->children as $childGroup) {
            foreach ($childGroup as $child) {
                if (!$child instanceof Component) {
                    // If one child is not a component, they all are so we skip
                    // the entire group.
                    continue 2;
                }
                if ($isBaseComponent($child)) {
                    $components[] = $child;
                }
            }
        }

        return $components;
    }

    /**
     * Returns the first component that is not a VTIMEZONE, and does not have
     * an RECURRENCE-ID.
     *
     * If there is no such component, null will be returned.
     *
     * @param string $componentName filter by component name
     *
     * @return VObject\Component|null
     */
    public function getBaseComponent($componentName = null)
    {
        $isBaseComponent = function ($component) {
            if (!$component instanceof VObject\Component) {
                return false;
            }
            if ('VTIMEZONE' === $component->name) {
                return false;
            }
            if (isset($component->{'RECURRENCE-ID'})) {
                return false;
            }

            return true;
        };

        if ($componentName) {
            foreach ($this->select($componentName) as $child) {
                if ($isBaseComponent($child)) {
                    return $child;
                }
            }

            return null;
        }

        // Searching all components
        foreach ($this->children as $childGroup) {
            foreach ($childGroup as $child) {
                if ($isBaseComponent($child)) {
                    return $child;
                }
            }
        }

        return null;
    }

    /**
     * Expand all events in this VCalendar object and return a new VCalendar
     * with the expanded events.
     *
     * If this calendar object, has events with recurrence rules, this method
     * can be used to expand the event into multiple sub-events.
     *
     * Each event will be stripped from its recurrence information, and only
     * the instances of the event in the specified timerange will be left
     * alone.
     *
     * In addition, this method will cause timezone information to be stripped,
     * and normalized to UTC.
     *
     * @param DateTimeZone $timeZone reference timezone for floating dates and
     *                               times
     *
     * @return VCalendar
     */
    public function expand(DateTimeInterface $start, DateTimeInterface $end, DateTimeZone $timeZone = null)
    {
        $newChildren = [];
        $recurringEvents = [];

        if (!$timeZone) {
            $timeZone = new DateTimeZone('UTC');
        }

        $stripTimezones = function (Component $component) use ($timeZone, &$stripTimezones) {
            foreach ($component->children() as $componentChild) {
                if ($componentChild instanceof Property\ICalendar\DateTime && $componentChild->hasTime()) {
                    $dt = $componentChild->getDateTimes($timeZone);
                    // We only need to update the first timezone, because
                    // setDateTimes will match all other timezones to the
                    // first.
                    $dt[0] = $dt[0]->setTimeZone(new DateTimeZone('UTC'));
                    $componentChild->setDateTimes($dt);
                } elseif ($componentChild instanceof Component) {
                    $stripTimezones($componentChild);
                }
            }

            return $component;
        };

        foreach ($this->children() as $child) {
            if ($child instanceof Property && 'PRODID' !== $child->name) {
                // We explicitly want to ignore PRODID, because we want to
                // overwrite it with our own.
                $newChildren[] = clone $child;
            } elseif ($child instanceof Component && 'VTIMEZONE' !== $child->name) {
                // We're also stripping all VTIMEZONE objects because we're
                // converting everything to UTC.
                if ('VEVENT' === $child->name && (isset($child->{'RECURRENCE-ID'}) || isset($child->RRULE) || isset($child->RDATE))) {
                    // Handle these a bit later.
                    $uid = (string) $child->UID;
                    if (!$uid) {
                        throw new InvalidDataException('Every VEVENT object must have a UID property');
                    }
                    if (isset($recurringEvents[$uid])) {
                        $recurringEvents[$uid][] = clone $child;
                    } else {
                        $recurringEvents[$uid] = [clone $child];
                    }
                } elseif ('VEVENT' === $child->name && $child->isInTimeRange($start, $end)) {
                    $newChildren[] = $stripTimezones(clone $child);
                }
            }
        }

        foreach ($recurringEvents as $events) {
            try {
                $it = new EventIterator($events, null, $timeZone);
            } catch (NoInstancesException $e) {
                // This event is recurring, but it doesn't have a single
                // instance. We are skipping this event from the output
                // entirely.
                continue;
            }
            $it->fastForward($start);

            while ($it->valid() && $it->getDTStart() < $end) {
                if ($it->getDTEnd() > $start) {
                    $newChildren[] = $stripTimezones($it->getEventObject());
                }
                $it->next();
            }
        }

        return new self($newChildren);
    }

    /**
     * This method should return a list of default property values.
     *
     * @return array
     */
    protected function getDefaults()
    {
        return [
            'VERSION' => '2.0',
            'PRODID' => '-//Sabre//Sabre VObject '.VObject\Version::VERSION.'//EN',
            'CALSCALE' => 'GREGORIAN',
        ];
    }

    /**
     * A simple list of validation rules.
     *
     * This is simply a list of properties, and how many times they either
     * must or must not appear.
     *
     * Possible values per property:
     *   * 0 - Must not appear.
     *   * 1 - Must appear exactly once.
     *   * + - Must appear at least once.
     *   * * - Can appear any number of times.
     *   * ? - May appear, but not more than once.
     *
     * @var array
     */
    public function getValidationRules()
    {
        return [
            'PRODID' => 1,
            'VERSION' => 1,

            'CALSCALE' => '?',
            'METHOD' => '?',
        ];
    }

    /**
     * Validates the node for correctness.
     *
     * The following options are supported:
     *   Node::REPAIR - May attempt to automatically repair the problem.
     *   Node::PROFILE_CARDDAV - Validate the vCard for CardDAV purposes.
     *   Node::PROFILE_CALDAV - Validate the iCalendar for CalDAV purposes.
     *
     * This method returns an array with detected problems.
     * Every element has the following properties:
     *
     *  * level - problem level.
     *  * message - A human-readable string describing the issue.
     *  * node - A reference to the problematic node.
     *
     * The level means:
     *   1 - The issue was repaired (only happens if REPAIR was turned on).
     *   2 - A warning.
     *   3 - An error.
     *
     * @param int $options
     *
     * @return array
     */
    public function validate($options = 0)
    {
        $warnings = parent::validate($options);

        if ($ver = $this->VERSION) {
            if ('2.0' !== (string) $ver) {
                $warnings[] = [
                    'level' => 3,
                    'message' => 'Only iCalendar version 2.0 as defined in rfc5545 is supported.',
                    'node' => $this,
                ];
            }
        }

        $uidList = [];
        $componentsFound = 0;
        $componentTypes = [];

        foreach ($this->children() as $child) {
            if ($child instanceof Component) {
                ++$componentsFound;

                if (!in_array($child->name, ['VEVENT', 'VTODO', 'VJOURNAL'])) {
                    continue;
                }
                $componentTypes[] = $child->name;

                $uid = (string) $child->UID;
                $isMaster = isset($child->{'RECURRENCE-ID'}) ? 0 : 1;
                if (isset($uidList[$uid])) {
                    ++$uidList[$uid]['count'];
                    if ($isMaster && $uidList[$uid]['hasMaster']) {
                        $warnings[] = [
                            'level' => 3,
                            'message' => 'More than one master object was found for the object with UID '.$uid,
                            'node' => $this,
                        ];
                    }
                    $uidList[$uid]['hasMaster'] += $isMaster;
                } else {
                    $uidList[$uid] = [
                        'count' => 1,
                        'hasMaster' => $isMaster,
                    ];
                }
            }
        }

        if (0 === $componentsFound) {
            $warnings[] = [
                'level' => 3,
                'message' => 'An iCalendar object must have at least 1 component.',
                'node' => $this,
            ];
        }

        if ($options & self::PROFILE_CALDAV) {
            if (count($uidList) > 1) {
                $warnings[] = [
                    'level' => 3,
                    'message' => 'A calendar object on a CalDAV server may only have components with the same UID.',
                    'node' => $this,
                ];
            }
            if (0 === count($componentTypes)) {
                $warnings[] = [
                    'level' => 3,
                    'message' => 'A calendar object on a CalDAV server must have at least 1 component (VTODO, VEVENT, VJOURNAL).',
                    'node' => $this,
                ];
            }
            if (count(array_unique($componentTypes)) > 1) {
                $warnings[] = [
                    'level' => 3,
                    'message' => 'A calendar object on a CalDAV server may only have 1 type of component (VEVENT, VTODO or VJOURNAL).',
                    'node' => $this,
                ];
            }

            if (isset($this->METHOD)) {
                $warnings[] = [
                    'level' => 3,
                    'message' => 'A calendar object on a CalDAV server MUST NOT have a METHOD property.',
                    'node' => $this,
                ];
            }
        }

        return $warnings;
    }

    /**
     * Returns all components with a specific UID value.
     *
     * @return array
     */
    public function getByUID($uid)
    {
        return array_filter($this->getComponents(), function ($item) use ($uid) {
            if (!$itemUid = $item->select('UID')) {
                return false;
            }
            $itemUid = current($itemUid)->getValue();

            return $uid === $itemUid;
        });
    }
}