summaryrefslogtreecommitdiffstats
path: root/kalarm/alarmcalendar.cpp
blob: 1f778c86892773d237561fb5062e5f46bf792784 (plain)
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
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
/*
 *  alarmcalendar.cpp  -  KAlarm calendar file access
 *  Program:  kalarm
 *  Copyright © 2001-2006,2009 by David Jarvie <djarvie@kde.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include "kalarm.h"
#include <unistd.h>
#include <time.h>

#include <tqfile.h>
#include <tqtextstream.h>
#include <tqregexp.h>
#include <tqtimer.h>

#include <klocale.h>
#include <kmessagebox.h>
#include <kstandarddirs.h>
#include <kstaticdeleter.h>
#include <tdeconfig.h>
#include <kaboutdata.h>
#include <tdeio/netaccess.h>
#include <tdefileitem.h>
#include <ktempfile.h>
#include <tdefiledialog.h>
#include <dcopclient.h>
#include <kdebug.h>

extern "C" {
#include <libical/ical.h>
}

#include <libkcal/vcaldrag.h>
#include <libkcal/vcalformat.h>
#include <libkcal/icalformat.h>

#include "calendarcompat.h"
#include "daemon.h"
#include "functions.h"
#include "kalarmapp.h"
#include "mainwindow.h"
#include "preferences.h"
#include "startdaytimer.h"
#include "alarmcalendar.moc"

using namespace KCal;

TQString AlarmCalendar::icalProductId()
{
	return TQString::fromLatin1("-//K Desktop Environment//NONSGML " KALARM_NAME " %1//EN").arg(KAlarm::currentCalendarVersionString());
}

static const KAEvent::Status eventTypes[AlarmCalendar::NCALS] = {
	KAEvent::ACTIVE, KAEvent::EXPIRED, KAEvent::DISPLAYING, KAEvent::TEMPLATE
};
static const TQString calendarNames[AlarmCalendar::NCALS] = {
	TQString::fromLatin1("calendar.ics"),
	TQString::fromLatin1("expired.ics"),
	TQString::fromLatin1("displaying.ics"),
	TQString::fromLatin1("template.ics")
};
static KStaticDeleter<AlarmCalendar> calendarDeleter[AlarmCalendar::NCALS];    // ensure that the calendar destructors are called

AlarmCalendar* AlarmCalendar::mCalendars[NCALS] = { 0, 0, 0, 0 };


/******************************************************************************
* Initialise the alarm calendars, and ensure that their file names are different.
* There are 4 calendars:
*  1) A user-independent one containing the active alarms;
*  2) A historical one containing expired alarms;
*  3) A user-specific one which contains details of alarms which are currently
*     being displayed to that user and which have not yet been acknowledged;
*  4) One containing alarm templates.
* Reply = true if success, false if calendar name error.
*/
bool AlarmCalendar::initialiseCalendars()
{
	TDEConfig* config = kapp->config();
	config->setGroup(TQString::fromLatin1("General"));
	TQString activeKey   = TQString::fromLatin1("Calendar");
	TQString expiredKey  = TQString::fromLatin1("ExpiredCalendar");
	TQString templateKey = TQString::fromLatin1("TemplateCalendar");
	TQString displayCal, activeCal, expiredCal, templateCal;
	calendarDeleter[ACTIVE].setObject(mCalendars[ACTIVE], createCalendar(ACTIVE, config, activeCal, activeKey));
	calendarDeleter[EXPIRED].setObject(mCalendars[EXPIRED], createCalendar(EXPIRED, config, expiredCal, expiredKey));
	calendarDeleter[DISPLAY].setObject(mCalendars[DISPLAY], createCalendar(DISPLAY, config, displayCal));
	calendarDeleter[TEMPLATE].setObject(mCalendars[TEMPLATE], createCalendar(TEMPLATE, config, templateCal, templateKey));

	TQString errorKey1, errorKey2;
	if (activeCal == displayCal)
		errorKey1 = activeKey;
	else if (expiredCal == displayCal)
		errorKey1 = expiredKey;
	else if (templateCal == displayCal)
		errorKey1 = templateKey;
	if (!errorKey1.isNull())
	{
		kdError(5950) << "AlarmCalendar::initialiseCalendars(): '" << errorKey1 << "' calendar name = display calendar name\n";
		TQString file = config->readPathEntry(errorKey1);
		KAlarmApp::displayFatalError(i18n("%1: file name not permitted: %2").arg(errorKey1).arg(file));
		return false;
	}
	if (activeCal == expiredCal)
	{
		errorKey1 = activeKey;
		errorKey2 = expiredKey;
	}
	else if (activeCal == templateCal)
	{
		errorKey1 = activeKey;
		errorKey2 = templateKey;
	}
	else if (expiredCal == templateCal)
	{
		errorKey1 = expiredKey;
		errorKey2 = templateKey;
	}
	if (!errorKey1.isNull())
	{
		kdError(5950) << "AlarmCalendar::initialiseCalendars(): calendar names clash: " << errorKey1 << ", " << errorKey2 << endl;
		KAlarmApp::displayFatalError(i18n("%1, %2: file names must be different").arg(errorKey1).arg(errorKey2));
		return false;
	}
	if (!mCalendars[ACTIVE]->valid())
	{
		TQString path = mCalendars[ACTIVE]->path();
		kdError(5950) << "AlarmCalendar::initialiseCalendars(): invalid name: " << path << endl;
		KAlarmApp::displayFatalError(i18n("Invalid calendar file name: %1").arg(path));
		return false;
	}
	return true;
}

/******************************************************************************
* Create an alarm calendar instance.
* If 'configKey' is non-null, the calendar will be converted to ICal format.
*/
AlarmCalendar* AlarmCalendar::createCalendar(CalID type, TDEConfig* config, TQString& writePath, const TQString& configKey)
{
	static TQRegExp vcsRegExp(TQString::fromLatin1("\\.vcs$"));
	static TQString ical = TQString::fromLatin1(".ics");

	if (configKey.isNull())
	{
		writePath = locateLocal("appdata", calendarNames[type]);
		return new AlarmCalendar(writePath, type);
	}
	else
	{
		TQString readPath = config->readPathEntry(configKey, locateLocal("appdata", calendarNames[type]));
		writePath = readPath;
		writePath.replace(vcsRegExp, ical);
		return new AlarmCalendar(readPath, type, writePath, configKey);
	}
}

/******************************************************************************
* Terminate access to all calendars.
*/
void AlarmCalendar::terminateCalendars()
{
	for (int i = 0;  i < NCALS;  ++i)
	{
		calendarDeleter[i].destructObject();
		mCalendars[i] = 0;
	}
}

/******************************************************************************
* Return a calendar, opening it first if not already open.
* Reply = calendar instance
*       = 0 if calendar could not be opened.
*/
AlarmCalendar* AlarmCalendar::calendarOpen(CalID id)
{
	AlarmCalendar* cal = mCalendars[id];
	if (!cal->mPurgeDays)
		return 0;     // all events are automatically purged from the calendar
	if (cal->open())
		return cal;
	kdError(5950) << "AlarmCalendar::calendarOpen(" << calendarNames[id] << "): open error\n";
	return 0;
}

/******************************************************************************
* Find and return the event with the specified ID.
* The calendar searched is determined by the calendar identifier in the ID.
*/
const KCal::Event* AlarmCalendar::getEvent(const TQString& uniqueID)
{
	if (uniqueID.isEmpty())
		return 0;
	CalID calID;
	switch (KAEvent::uidStatus(uniqueID))
	{
		case KAEvent::ACTIVE:      calID = ACTIVE;  break;
		case KAEvent::TEMPLATE:    calID = TEMPLATE;  break;
		case KAEvent::EXPIRED:     calID = EXPIRED;  break;
		case KAEvent::DISPLAYING:  calID = DISPLAY;  break;
		default:
			return 0;
	}
	AlarmCalendar* cal = calendarOpen(calID);
	if (!cal)
		return 0;
	return cal->event(uniqueID);
}


/******************************************************************************
* Constructor.
* If 'icalPath' is non-null, the file will be always be saved in ICal format.
* If 'configKey' is also non-null, that config file entry will be updated when
* the file is saved in ICal format.
*/
AlarmCalendar::AlarmCalendar(const TQString& path, CalID type, const TQString& icalPath,
                             const TQString& configKey)
	: mCalendar(0),
	  mConfigKey(icalPath.isNull() ? TQString() : configKey),
	  mType(eventTypes[type]),
	  mPurgeDays(-1),      // default to not purging
	  mOpen(false),
	  mPurgeDaysQueued(-1),
	  mUpdateCount(0),
	  mUpdateSave(false)
{
	mUrl.setPath(path);       // N.B. constructor mUrl(path) doesn't work with UNIX paths
	mICalUrl.setPath(icalPath.isNull() ? path : icalPath);
	mVCal = (icalPath.isNull() || path != icalPath);    // is the calendar in ICal or VCal format?
}

AlarmCalendar::~AlarmCalendar()
{
	close();
}

/******************************************************************************
* Open the calendar file if not already open, and load it into memory.
*/
bool AlarmCalendar::open()
{
	if (mOpen)
		return true;
	if (!mUrl.isValid())
		return false;

	kdDebug(5950) << "AlarmCalendar::open(" << mUrl.prettyURL() << ")\n";
	if (!mCalendar)
		mCalendar = new CalendarLocal(TQString::fromLatin1("UTC"));
	mCalendar->setLocalTime();    // write out using local time (i.e. no time zone)

	// Check for file's existence, assuming that it does exist when uncertain,
	// to avoid overwriting it.
	if (!TDEIO::NetAccess::exists(mUrl, true, MainWindow::mainMainWindow()))
	{
		// The calendar file doesn't yet exist, so create it
		if (create())
			load();
	}
	else
	{
		// Load the existing calendar file
		if (load() == 0)
		{
			if (create())       // zero-length file - create a new one
				load();
		}
	}
	if (!mOpen)
	{
		delete mCalendar;
		mCalendar = 0;
	}
	return mOpen;
}

/******************************************************************************
* Private method to create a new calendar file.
* It is always created in iCalendar format.
*/
bool AlarmCalendar::create()
{
	if (mICalUrl.isLocalFile())
		return saveCal(mICalUrl.path());
	else
	{
		KTempFile tmpFile;
		return saveCal(tmpFile.name());
	}
}

/******************************************************************************
* Load the calendar file into memory.
* Reply = 1 if success
*       = 0 if zero-length file exists.
*       = -1 if failure to load calendar file
*       = -2 if instance uninitialised.
*/
int AlarmCalendar::load()
{
	if (!mCalendar)
		return -2;

	kdDebug(5950) << "AlarmCalendar::load(): " << mUrl.prettyURL() << endl;
	TQString tmpFile;
	if (!TDEIO::NetAccess::download(mUrl, tmpFile, MainWindow::mainMainWindow()))
	{
		kdError(5950) << "AlarmCalendar::load(): Load failure" << endl;
		KMessageBox::error(0, i18n("Cannot open calendar:\n%1").arg(mUrl.prettyURL()));
		return -1;
	}
	kdDebug(5950) << "AlarmCalendar::load(): --- Downloaded to " << tmpFile << endl;
	mCalendar->setTimeZoneId(TQString());   // default to the local time zone for reading
	bool loaded = mCalendar->load(tmpFile);
	mCalendar->setLocalTime();                 // write using local time (i.e. no time zone)
	if (!loaded)
	{
		// Check if the file is zero length
		TDEIO::NetAccess::removeTempFile(tmpFile);
		TDEIO::UDSEntry uds;
		TDEIO::NetAccess::stat(mUrl, uds, MainWindow::mainMainWindow());
		KFileItem fi(uds, mUrl);
		if (!fi.size())
			return 0;     // file is zero length
		kdError(5950) << "AlarmCalendar::load(): Error loading calendar file '" << tmpFile << "'" << endl;
		KMessageBox::error(0, i18n("Error loading calendar:\n%1\n\nPlease fix or delete the file.").arg(mUrl.prettyURL()));
		// load() could have partially populated the calendar, so clear it out
		mCalendar->close();
		delete mCalendar;
		mCalendar = 0;
		return -1;
	}
	if (!mLocalFile.isEmpty())
		TDEIO::NetAccess::removeTempFile(mLocalFile);   // removes it only if it IS a temporary file
	mLocalFile = tmpFile;

	CalendarCompat::fix(*mCalendar, mLocalFile);   // convert events to current KAlarm format for when calendar is saved
	mOpen = true;
	return 1;
}

/******************************************************************************
* Reload the calendar file into memory.
*/
bool AlarmCalendar::reload()
{
	if (!mCalendar)
		return false;
	kdDebug(5950) << "AlarmCalendar::reload(): " << mUrl.prettyURL() << endl;
	close();
	bool result = open();
	return result;
}

/******************************************************************************
* Save the calendar from memory to file.
* If a filename is specified, create a new calendar file.
*/
bool AlarmCalendar::saveCal(const TQString& newFile)
{
	if (!mCalendar  ||  !mOpen && newFile.isNull())
		return false;

	kdDebug(5950) << "AlarmCalendar::saveCal(\"" << newFile << "\", " << mType << ")\n";
	TQString saveFilename = newFile.isNull() ? mLocalFile : newFile;
	if (mVCal  &&  newFile.isNull()  &&  mUrl.isLocalFile())
		saveFilename = mICalUrl.path();
	if (!mCalendar->save(saveFilename, new ICalFormat))
	{
		kdError(5950) << "AlarmCalendar::saveCal(" << saveFilename << "): failed.\n";
		KMessageBox::error(0, i18n("Failed to save calendar to\n'%1'").arg(mICalUrl.prettyURL()));
		return false;
	}

	if (!mICalUrl.isLocalFile())
	{
		if (!TDEIO::NetAccess::upload(saveFilename, mICalUrl, MainWindow::mainMainWindow()))
		{
			kdError(5950) << "AlarmCalendar::saveCal(" << saveFilename << "): upload failed.\n";
			KMessageBox::error(0, i18n("Cannot upload calendar to\n'%1'").arg(mICalUrl.prettyURL()));
			return false;
		}
	}

	if (mVCal)
	{
		// The file was in vCalendar format, but has now been saved in iCalendar format.
		// Save the change in the config file.
		if (!mConfigKey.isNull())
		{
			TDEConfig* config = kapp->config();
			config->setGroup(TQString::fromLatin1("General"));
			config->writePathEntry(mConfigKey, mICalUrl.path());
			config->sync();
		}
		mUrl  = mICalUrl;
		mVCal = false;
	}

	mUpdateSave = false;
	emit calendarSaved(this);
	return true;
}

/******************************************************************************
* Delete any temporary file at program exit.
*/
void AlarmCalendar::close()
{
	if (!mLocalFile.isEmpty())
	{
		TDEIO::NetAccess::removeTempFile(mLocalFile);   // removes it only if it IS a temporary file
		mLocalFile = "";
	}
	if (mCalendar)
	{
		mCalendar->close();
		delete mCalendar;
		mCalendar = 0;
	}
	mOpen = false;
}

/******************************************************************************
* Import alarms from an external calendar and merge them into KAlarm's calendar.
* The alarms are given new unique event IDs.
* Parameters: parent = parent widget for error message boxes
* Reply = true if all alarms in the calendar were successfully imported
*       = false if any alarms failed to be imported.
*/
bool AlarmCalendar::importAlarms(TQWidget* parent)
{
	KURL url = KFileDialog::getOpenURL(TQString::fromLatin1(":importalarms"),
	                                   TQString::fromLatin1("*.vcs *.ics|%1").arg(i18n("Calendar Files")), parent);
	if (url.isEmpty())
	{
		kdError(5950) << "AlarmCalendar::importAlarms(): Empty URL" << endl;
		return false;
	}
	if (!url.isValid())
	{
		kdDebug(5950) << "AlarmCalendar::importAlarms(): Invalid URL" << endl;
		return false;
	}
	kdDebug(5950) << "AlarmCalendar::importAlarms(" << url.prettyURL() << ")" << endl;

	bool success = true;
	TQString filename;
	bool local = url.isLocalFile();
	if (local)
	{
		filename = url.path();
		if (!TDEStandardDirs::exists(filename))
		{
			kdDebug(5950) << "AlarmCalendar::importAlarms(): File '" << url.prettyURL() << "' not found" << endl;
			KMessageBox::error(parent, i18n("Could not load calendar '%1'.").arg(url.prettyURL()));
			return false;
		}
	}
	else
	{
		if (!TDEIO::NetAccess::download(url, filename, MainWindow::mainMainWindow()))
		{
			kdError(5950) << "AlarmCalendar::importAlarms(): Download failure" << endl;
			KMessageBox::error(parent, i18n("Cannot download calendar:\n%1").arg(url.prettyURL()));
			return false;
		}
		kdDebug(5950) << "--- Downloaded to " << filename << endl;
	}

	// Read the calendar and add its alarms to the current calendars
	CalendarLocal cal(TQString::fromLatin1("UTC"));
	cal.setLocalTime();    // write out using local time (i.e. no time zone)
	success = cal.load(filename);
	if (!success)
	{
		kdDebug(5950) << "AlarmCalendar::importAlarms(): error loading calendar '" << filename << "'" << endl;
		KMessageBox::error(parent, i18n("Could not load calendar '%1'.").arg(url.prettyURL()));
	}
	else
	{
		CalendarCompat::fix(cal, filename);
		bool saveActive   = false;
		bool saveExpired  = false;
		bool saveTemplate = false;
		AlarmCalendar* active  = activeCalendar();
		AlarmCalendar* expired = expiredCalendar();
		AlarmCalendar* templat = 0;
		AlarmCalendar* acal;
		Event::List events = cal.rawEvents();
		for (Event::List::ConstIterator it = events.begin();  it != events.end();  ++it)
		{
			const Event* event = *it;
			if (event->alarms().isEmpty()  ||  !KAEvent(*event).valid())
				continue;    // ignore events without alarms, or usable alarms
			KAEvent::Status type = KAEvent::uidStatus(event->uid());
			switch (type)
			{
				case KAEvent::ACTIVE:
					acal = active;
					saveActive = true;
					break;
				case KAEvent::EXPIRED:
					acal = expired;
					saveExpired = true;
					break;
				case KAEvent::TEMPLATE:
					if (!templat)
						templat = templateCalendarOpen();
					acal = templat;
					saveTemplate = true;
					break;
				default:
					continue;
			}
			if (!acal)
				continue;

			Event* newev = new Event(*event);

			// If there is a display alarm without display text, use the event
			// summary text instead.
			if (type == KAEvent::ACTIVE  &&  !newev->summary().isEmpty())
			{
				const Alarm::List& alarms = newev->alarms();
				for (Alarm::List::ConstIterator ait = alarms.begin();  ait != alarms.end();  ++ait)
				{
					Alarm* alarm = *ait;
					if (alarm->type() == Alarm::Display  &&  alarm->text().isEmpty())
						alarm->setText(newev->summary());
				}
				newev->setSummary(TQString());   // KAlarm only uses summary for template names
			}
			// Give the event a new ID and add it to the calendar
			newev->setUid(KAEvent::uid(CalFormat::createUniqueId(), type));
			if (!acal->mCalendar->addEvent(newev))
				success = false;
		}

		// Save any calendars which have been modified
		if (saveActive)
			active->saveCal();
		if (saveExpired)
			expired->saveCal();
		if (saveTemplate)
			templat->saveCal();
	}
	if (!local)
		TDEIO::NetAccess::removeTempFile(filename);
	return success;
}

/******************************************************************************
* Flag the start of a group of calendar update calls.
* The purpose is to avoid multiple calendar saves during a group of operations.
*/
void AlarmCalendar::startUpdate()
{
	++mUpdateCount;
}

/******************************************************************************
* Flag the end of a group of calendar update calls.
* The calendar is saved if appropriate.
*/
bool AlarmCalendar::endUpdate()
{
	if (mUpdateCount > 0)
		--mUpdateCount;
	if (!mUpdateCount)
	{
		if (mUpdateSave)
			return saveCal();
	}
	return true;
}

/******************************************************************************
* Save the calendar, or flag it for saving if in a group of calendar update calls.
*/
bool AlarmCalendar::save()
{
	if (mUpdateCount)
	{
		mUpdateSave = true;
		return true;
	}
	else
		return saveCal();
}

#if 0
/******************************************************************************
* If it is VCal format, convert the calendar URL to ICal and save the new URL
* in the config file.
*/
void AlarmCalendar::convertToICal()
{
	if (mVCal)
	{
		if (!mConfigKey.isNull())
		{
			TDEConfig* config = kapp->config();
			config->setGroup(TQString::fromLatin1("General"));
			config->writePathEntry(mConfigKey, mICalUrl.path());
			config->sync();
		}
		mUrl  = mICalUrl;
		mVCal = false;
	}
}
#endif

/******************************************************************************
* Set the number of days to keep alarms.
* Alarms which are older are purged immediately, and at the start of each day.
*/
void AlarmCalendar::setPurgeDays(int days)
{
	if (days != mPurgeDays)
	{
		int oldDays = mPurgeDays;
		mPurgeDays = days;
		if (mPurgeDays <= 0)
			StartOfDayTimer::disconnect(this);
		if (oldDays < 0  ||  days >= 0 && days < oldDays)
		{
			// Alarms are now being kept for less long, so purge them
			if (open())
				slotPurge();
		}
		else if (mPurgeDays > 0)
			startPurgeTimer();
	}
}

/******************************************************************************
* Called at the start of each day by the purge timer.
* Purge all events from the calendar whose end time is longer ago than 'mPurgeDays'.
*/
void AlarmCalendar::slotPurge()
{
	purge(mPurgeDays);
	startPurgeTimer();
}

/******************************************************************************
* Purge all events from the calendar whose end time is longer ago than
* 'daysToKeep'. All events are deleted if 'daysToKeep' is zero.
*/
void AlarmCalendar::purge(int daysToKeep)
{
	if (mPurgeDaysQueued < 0  ||  daysToKeep < mPurgeDaysQueued)
		mPurgeDaysQueued = daysToKeep;

	// Do the purge once any other current operations are completed
	theApp()->processQueue();
}

/******************************************************************************
* This method must only be called from the main KAlarm queue processing loop,
* to prevent asynchronous calendar operations interfering with one another.
*
* Purge all events from the calendar whose end time is longer ago than 'daysToKeep'.
* All events are deleted if 'daysToKeep' is zero.
* The calendar must already be open.
*/
void AlarmCalendar::purgeIfQueued()
{
	if (mPurgeDaysQueued >= 0)
	{
		if (open())
		{
			kdDebug(5950) << "AlarmCalendar::purgeIfQueued(" << mPurgeDaysQueued << ")\n";
			bool changed = false;
			TQDate cutoff = TQDate::currentDate().addDays(-mPurgeDaysQueued);
			Event::List events = mCalendar->rawEvents();
			for (Event::List::ConstIterator it = events.begin();  it != events.end();  ++it)
			{
				Event* kcalEvent = *it;
				if (!mPurgeDaysQueued  ||  kcalEvent->created().date() < cutoff)
				{
					mCalendar->deleteEvent(kcalEvent);
					changed = true;
				}
			}
			if (changed)
			{
				saveCal();
				emit purged();
			}
			mPurgeDaysQueued = -1;
		}
	}
}


/******************************************************************************
* Start the purge timer to expire at the start of the next day (using the user-
* defined start-of-day time).
*/
void AlarmCalendar::startPurgeTimer()
{
	if (mPurgeDays > 0)
		StartOfDayTimer::connect(this, TQT_SLOT(slotPurge()));
}

/******************************************************************************
* Add the specified event to the calendar.
* If it is the active calendar and 'useEventID' is false, a new event ID is
* created. In all other cases, the event ID is taken from 'event'.
* 'event' is updated with the actual event ID.
* Reply = the KCal::Event as written to the calendar.
*/
Event* AlarmCalendar::addEvent(KAEvent& event, bool useEventID)
{
	if (!mOpen)
		return 0;
	TQString id = event.id();
	Event* kcalEvent = new Event;
	if (mType == KAEvent::ACTIVE)
	{
		if (id.isEmpty())
			useEventID = false;
		if (!useEventID)
			event.setEventID(kcalEvent->uid());
	}
	else
	{
		if (id.isEmpty())
			id = kcalEvent->uid();
		useEventID = true;
	}
	if (useEventID)
	{
		id = KAEvent::uid(id, mType);
		event.setEventID(id);
		kcalEvent->setUid(id);
	}
	event.updateKCalEvent(*kcalEvent, false, (mType == KAEvent::EXPIRED), true);
	mCalendar->addEvent(kcalEvent);
	event.clearUpdated();
	return kcalEvent;
}

/******************************************************************************
* Update the specified event in the calendar with its new contents.
* The event retains the same ID.
*/
void AlarmCalendar::updateEvent(const KAEvent& evnt)
{
	if (mOpen)
	{
		Event* kcalEvent = event(evnt.id());
		if (kcalEvent)
		{
			evnt.updateKCalEvent(*kcalEvent);
			evnt.clearUpdated();
			if (mType == KAEvent::ACTIVE)
				Daemon::savingEvent(evnt.id());
			return;
		}
	}
	if (mType == KAEvent::ACTIVE)
		Daemon::eventHandled(evnt.id(), false);
}

/******************************************************************************
* Delete the specified event from the calendar, if it exists.
* The calendar is then optionally saved.
*/
bool AlarmCalendar::deleteEvent(const TQString& eventID, bool saveit)
{
	if (mOpen)
	{
		Event* kcalEvent = event(eventID);
		if (kcalEvent)
		{
			mCalendar->deleteEvent(kcalEvent);
			if (mType == KAEvent::ACTIVE)
				Daemon::savingEvent(eventID);
			if (saveit)
				return save();
			return true;
		}
	}
	if (mType == KAEvent::ACTIVE)
		Daemon::eventHandled(eventID, false);
	return false;
}

/******************************************************************************
* Emit a signal to indicate whether the calendar is empty.
*/
void AlarmCalendar::emitEmptyStatus()
{
	emit emptyStatus(events().isEmpty());
}

/******************************************************************************
* Return the event with the specified ID.
*/
KCal::Event* AlarmCalendar::event(const TQString& uniqueID)
{
	return mCalendar ?  mCalendar->event(uniqueID) : 0;
}

/******************************************************************************
* Return all events in the calendar which contain usable alarms.
*/
KCal::Event::List AlarmCalendar::events()
{
	if (!mCalendar)
		return KCal::Event::List();
	KCal::Event::List list = mCalendar->rawEvents();
	KCal::Event::List::Iterator it = list.begin();
	while (it != list.end())
	{
		KCal::Event* event = *it;
		if (event->alarms().isEmpty()  ||  !KAEvent(*event).valid())
			it = list.remove(it);
		else
			++it;
	}
	return list;
}

/******************************************************************************
* Return all events which have alarms falling within the specified time range.
*/
Event::List AlarmCalendar::eventsWithAlarms(const TQDateTime& from, const TQDateTime& to)
{
	kdDebug(5950) << "AlarmCalendar::eventsWithAlarms(" << from.toString() << " - " << to.toString() << ")\n";
	Event::List evnts;
	TQDateTime dt;
	Event::List allEvents = events();   // ignore events without usable alarms
	for (Event::List::ConstIterator it = allEvents.begin();  it != allEvents.end();  ++it)
	{
		Event* e = *it;
		bool recurs = e->doesRecur();
		int  endOffset = 0;
		bool endOffsetValid = false;
		const Alarm::List& alarms = e->alarms();
		for (Alarm::List::ConstIterator ait = alarms.begin();  ait != alarms.end();  ++ait)
		{
			Alarm* alarm = *ait;
			if (alarm->enabled())
			{
				if (recurs)
				{
					if (alarm->hasTime())
						dt = alarm->time();
					else
					{
						// The alarm time is defined by an offset from the event start or end time.
						// Find the offset from the event start time, which is also used as the
						// offset from the recurrence time.
						int offset = 0;
						if (alarm->hasStartOffset())
							offset = alarm->startOffset().asSeconds();
						else if (alarm->hasEndOffset())
						{
							if (!endOffsetValid)
							{
								endOffset = e->hasDuration() ? e->duration() : e->hasEndDate() ? e->dtStart().secsTo(e->dtEnd()) : 0;
								endOffsetValid = true;
							}
							offset = alarm->endOffset().asSeconds() + endOffset;
						}
						// Adjust the 'from' date/time and find the next recurrence at or after it
						TQDateTime pre = from.addSecs(-offset - 1);
						if (e->doesFloat()  &&  pre.time() < Preferences::startOfDay())
							pre = pre.addDays(-1);    // today's recurrence (if today recurs) is still to come
						dt = e->recurrence()->getNextDateTime(pre);
						if (!dt.isValid())
							continue;
						dt = dt.addSecs(offset);
					}
				}
				else
					dt = alarm->time();
				if (dt >= from  &&  dt <= to)
				{
					kdDebug(5950) << "AlarmCalendar::events() '" << e->summary()
					              << "': " << dt.toString() << endl;
					evnts.append(e);
					break;
				}
			}
		}
	}
	return evnts;
}