summaryrefslogtreecommitdiffstats
path: root/src/recur.c
blob: 0207e9d20da2de9ad08f37b3d6500b64198df9a8 (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
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
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
/*	$calcurse: recur.c,v 1.39 2008/11/16 17:42:53 culot Exp $	*/

/*
 * Calcurse - text-based organizer
 * Copyright (c) 2004-2008 Frederic Culot
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Send your feedback or comments to : calcurse@culot.org
 * Calcurse home page : http://culot.org/calcurse
 *
 */

#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <time.h>

#include "i18n.h"
#include "utils.h"
#include "notify.h"
#include "day.h"
#include "keys.h"
#include "recur.h"

recur_apoint_llist_t *recur_alist_p;
struct recur_event_s *recur_elist;

int
recur_apoint_llist_init (void)
{
  recur_alist_p = (recur_apoint_llist_t *)
      malloc (sizeof (recur_apoint_llist_t));
  recur_alist_p->root = NULL;
  pthread_mutex_init (&(recur_alist_p->mutex), NULL);

  return (0);
}

/* Insert a new recursive appointment in the general linked list */
recur_apoint_llist_node_t *
recur_apoint_new (char *mesg, char *note, long start, long dur, char state,
		  int type, int freq, long until, struct days_s *except)
{
  recur_apoint_llist_node_t *o, **i;
  o = (recur_apoint_llist_node_t *)
      malloc (sizeof (recur_apoint_llist_node_t));
  o->rpt = (struct rpt_s *) malloc (sizeof (struct rpt_s));
  o->mesg = (char *) malloc (strlen (mesg) + 1);
  strncpy (o->mesg, mesg, strlen (mesg) + 1);
  o->note = (note != NULL) ? strdup (note) : NULL;
  o->start = start;
  o->state = state;
  o->dur = dur;
  o->rpt->type = type;
  o->rpt->freq = freq;
  o->rpt->until = until;
  o->exc = except;

  pthread_mutex_lock (&(recur_alist_p->mutex));
  i = &recur_alist_p->root;
  for (;;)
    {
      if (*i == 0 || (*i)->start > start)
	{
	  o->next = *i;
	  *i = o;
	  break;
	}
      i = &(*i)->next;
    }
  pthread_mutex_unlock (&(recur_alist_p->mutex));

  return (o);
}

/* Insert a new recursive event in the general linked list */
struct recur_event_s *
recur_event_new (char *mesg, char *note, long day, int id, int type, int freq,
		 long until, struct days_s *except)
{
  struct recur_event_s *o, **i;
  o = (struct recur_event_s *) malloc (sizeof (struct recur_event_s));
  o->rpt = (struct rpt_s *) malloc (sizeof (struct rpt_s));
  o->mesg = (char *) malloc (strlen (mesg) + 1);
  o->note = (note != NULL) ? strdup (note) : NULL;
  strncpy (o->mesg, mesg, strlen (mesg) + 1);
  o->day = day;
  o->id = id;
  o->rpt->type = type;
  o->rpt->freq = freq;
  o->rpt->until = until;
  o->exc = except;
  i = &recur_elist;
  for (;;)
    {
      if (*i == 0 || (*i)->day > day)
	{
	  o->next = *i;
	  *i = o;
	  break;
	}
      i = &(*i)->next;
    }
  return (o);
}

/* 
 * Correspondance between the defines on recursive type, 
 * and the letter to be written in file. 
 */
char
recur_def2char (recur_types_t define)
{
  char recur_char;
  char *error = _("FATAL ERROR in recur_def2char: unknown recur type\n");

  switch (define)
    {
    case RECUR_DAILY:
      recur_char = 'D';
      break;
    case RECUR_WEEKLY:
      recur_char = 'W';
      break;
    case RECUR_MONTHLY:
      recur_char = 'M';
      break;
    case RECUR_YEARLY:
      recur_char = 'Y';
      break;
    default:
      fputs (error, stderr);
      exit (EXIT_FAILURE);
    }

  return (recur_char);
}

/* 
 * Correspondance between the letters written in file and the defines
 * concerning the recursive type.
 */
int
recur_char2def (char type)
{
  int recur_def;
  char *error = _("FATAL ERROR in recur_char2def: unknown char\n");

  switch (type)
    {
    case 'D':
      recur_def = RECUR_DAILY;
      break;
    case 'W':
      recur_def = RECUR_WEEKLY;
      break;
    case 'M':
      recur_def = RECUR_MONTHLY;
      break;
    case 'Y':
      recur_def = RECUR_YEARLY;
      break;
    default:
      fputs (error, stderr);
      exit (EXIT_FAILURE);
    }
  return (recur_def);
}

/* Write days for which recurrent items should not be repeated. */
static void
recur_write_exc (struct days_s *exc, FILE *f)
{
  struct tm *lt;
  time_t t;
  int st_mon, st_day, st_year;

  while (exc)
    {
      t = exc->st;
      lt = localtime (&t);
      st_mon = lt->tm_mon + 1;
      st_day = lt->tm_mday;
      st_year = lt->tm_year + 1900;
      fprintf (f, " !%02u/%02u/%04u", st_mon, st_day, st_year);
      exc = exc->next;
    }
}

/* Load the recursive appointment description */
recur_apoint_llist_node_t *
recur_apoint_scan (FILE *f, struct tm start, struct tm end, char type,
		   int freq, struct tm until, char *note, struct days_s *exc,
		   char state)
{
  struct tm *lt;
  char buf[MESG_MAXSIZE], *nl;
  time_t tstart, tend, t, tuntil;

  t = time (NULL);
  lt = localtime (&t);

  /* Read the appointment description */
  fgets (buf, MESG_MAXSIZE, f);
  nl = strchr (buf, '\n');
  if (nl)
    {
      *nl = '\0';
    }
  start.tm_sec = end.tm_sec = 0;
  start.tm_isdst = end.tm_isdst = -1;
  start.tm_year -= 1900;
  start.tm_mon--;
  end.tm_year -= 1900;
  end.tm_mon--;
  tstart = mktime (&start);
  tend = mktime (&end);

  if (until.tm_year != 0)
    {
      until.tm_hour = 23;
      until.tm_min = 59;
      until.tm_sec = 0;
      until.tm_isdst = -1;
      until.tm_year -= 1900;
      until.tm_mon--;
      tuntil = mktime (&until);
    }
  else
    {
      tuntil = 0;
    }

  if (tstart == -1 || tend == -1 || tstart > tend || tuntil == -1)
    {
      fputs (_("FATAL ERROR in apoint_scan: date error in the appointment\n"),
	     stderr);
      exit (EXIT_FAILURE);
    }

  return (recur_apoint_new (buf, note, tstart, tend - tstart, state,
			    recur_char2def (type), freq, tuntil, exc));
}

/* Load the recursive events from file */
struct recur_event_s *
recur_event_scan (FILE *f, struct tm start, int id, char type, int freq,
		  struct tm until, char *note, struct days_s *exc)
{
  struct tm *lt;
  char buf[MESG_MAXSIZE], *nl;
  time_t tstart, t, tuntil;

  t = time (NULL);
  lt = localtime (&t);

  /* Read the event description */
  fgets (buf, MESG_MAXSIZE, f);
  nl = strchr (buf, '\n');
  if (nl)
    {
      *nl = '\0';
    }
  start.tm_hour = until.tm_hour = 12;
  start.tm_min = until.tm_min = 0;
  start.tm_sec = until.tm_sec = 0;
  start.tm_isdst = until.tm_isdst = -1;
  start.tm_year -= 1900;
  start.tm_mon--;
  if (until.tm_year != 0)
    {
      until.tm_year -= 1900;
      until.tm_mon--;
      tuntil = mktime (&until);
    }
  else
    {
      tuntil = 0;
    }
  tstart = mktime (&start);
  if ((tstart == -1) || (tuntil == -1))
    {
      fputs (_("FATAL ERROR in recur_event_scan: "
	       "date error in the event\n"), stderr);
      exit (EXIT_FAILURE);
    }

  return (recur_event_new (buf, note, tstart, id, recur_char2def (type),
                           freq, tuntil, exc));
}

/* Writting of a recursive appointment into file. */
static void
recur_apoint_write (recur_apoint_llist_node_t *o, FILE *f)
{
  struct tm *lt;
  time_t t;

  t = o->start;
  lt = localtime (&t);
  fprintf (f, "%02u/%02u/%04u @ %02u:%02u",
	   lt->tm_mon + 1, lt->tm_mday, 1900 + lt->tm_year,
	   lt->tm_hour, lt->tm_min);

  t = o->start + o->dur;
  lt = localtime (&t);
  fprintf (f, " -> %02u/%02u/%04u @ %02u:%02u",
	   lt->tm_mon + 1, lt->tm_mday, 1900 + lt->tm_year,
	   lt->tm_hour, lt->tm_min);

  t = o->rpt->until;
  if (t == 0)
    {				/* We have an endless recurrent appointment. */
      fprintf (f, " {%d%c", o->rpt->freq, recur_def2char (o->rpt->type));
    }
  else
    {
      lt = localtime (&t);
      fprintf (f, " {%d%c -> %02u/%02u/%04u",
	       o->rpt->freq, recur_def2char (o->rpt->type),
	       lt->tm_mon + 1, lt->tm_mday, 1900 + lt->tm_year);
    }
  if (o->exc != 0)
    recur_write_exc (o->exc, f);
  fprintf (f, "} ");
  if (o->note != NULL)
    fprintf (f, ">%s ", o->note);
  if (o->state & APOINT_NOTIFY)
    fprintf (f, "!");
  else
    fprintf (f, "|");
  fprintf (f, "%s\n", o->mesg);
}

/* Writting of a recursive event into file. */
static void
recur_event_write (struct recur_event_s *o, FILE *f)
{
  struct tm *lt;
  time_t t;
  int st_mon, st_day, st_year;
  int end_mon, end_day, end_year;

  t = o->day;
  lt = localtime (&t);
  st_mon = lt->tm_mon + 1;
  st_day = lt->tm_mday;
  st_year = lt->tm_year + 1900;
  t = o->rpt->until;
  if (t == 0)
    {				/* We have an endless recurrent event. */
      fprintf (f, "%02u/%02u/%04u [%d] {%d%c",
	       st_mon, st_day, st_year, o->id, o->rpt->freq,
	       recur_def2char (o->rpt->type));
    }
  else
    {
      lt = localtime (&t);
      end_mon = lt->tm_mon + 1;
      end_day = lt->tm_mday;
      end_year = lt->tm_year + 1900;
      fprintf (f, "%02u/%02u/%04u [%d] {%d%c -> %02u/%02u/%04u",
	       st_mon, st_day, st_year, o->id,
	       o->rpt->freq, recur_def2char (o->rpt->type),
	       end_mon, end_day, end_year);
    }
  if (o->exc != 0)
    recur_write_exc (o->exc, f);
  fprintf (f, "} ");
  if (o->note != NULL)
    fprintf (f, ">%s ", o->note);
  fprintf (f, "%s\n", o->mesg);
}

/* Write recursive items to file. */
void
recur_save_data (FILE *f)
{
  struct recur_event_s *re;
  recur_apoint_llist_node_t *ra;

  for (re = recur_elist; re != 0; re = re->next)
    recur_event_write (re, f);

  pthread_mutex_lock (&(recur_alist_p->mutex));
  for (ra = recur_alist_p->root; ra != 0; ra = ra->next)
    recur_apoint_write (ra, f);
  pthread_mutex_unlock (&(recur_alist_p->mutex));
}

/* Given a day as long, check if this day belongs to the list of exceptions for
 * the considered item.
 */
int
recur_day_is_exc (long day, struct days_s *item_exc)
{
  const int NOT_EXC = 0;
  const int EXC = 1;
  struct days_s *exc;

  for (exc = item_exc; exc != 0; exc = exc->next)
    {
      if (exc->st == day)
        return EXC;
    }
  return NOT_EXC;
}

/* 
 * Check if the recurrent item belongs to the selected day,
 * and if yes, return the real start time.
 * This function was improved thanks to Tony's patch.
 */
unsigned
recur_item_inday (long item_start, struct days_s *item_exc, int rpt_type,
		  int rpt_freq, long rpt_until, long day_start)
{
  date_t start_date;
  long day_end, diff;
  struct tm lt_item, lt_day;
  struct days_s *exc;
  time_t t;
  char *error = _("FATAL ERROR in recur_item_inday: unknown item type\n");

  day_end = day_start + DAYINSEC;
  t = day_start;
  lt_day = *localtime (&t);

  for (exc = item_exc; exc != 0; exc = exc->next)
    if (exc->st < day_end && exc->st >= day_start)
      return (0);

  if (rpt_until == 0)		/* we have an endless recurrent item */
    rpt_until = day_end;

  if (item_start > day_end || rpt_until < day_start)
    return (0);

  t = item_start;
  lt_item = *localtime (&t);

  /* For proper calculation, both items must start at same time. */
  day_start += (lt_item.tm_hour * HOURINSEC + lt_item.tm_min * MININSEC +
		lt_item.tm_sec);

  switch (rpt_type)
    {
    case RECUR_DAILY:
      diff = (long) difftime ((time_t) day_start, (time_t) item_start);
      if (diff % (rpt_freq * DAYINSEC) != 0)
	return (0);
      lt_item.tm_mday = lt_day.tm_mday;
      lt_item.tm_mon = lt_day.tm_mon;
      lt_item.tm_year = lt_day.tm_year;
      break;
    case RECUR_WEEKLY:
      if (lt_item.tm_wday != lt_day.tm_wday)
	return (0);
      else
	{
	  diff = ((lt_day.tm_yday - lt_item.tm_yday) / WEEKINDAYS);
	  if (diff % rpt_freq != 0)
	    return (0);
	}
      lt_item.tm_mday = lt_day.tm_mday;
      lt_item.tm_mon = lt_day.tm_mon;
      lt_item.tm_year = lt_day.tm_year;
      break;
    case RECUR_MONTHLY:
      diff = (((lt_day.tm_year - lt_item.tm_year) * 12)
              + (lt_day.tm_mon - lt_item.tm_mon));
      if (diff % rpt_freq != 0)
	return (0);
      lt_item.tm_mon = lt_day.tm_mon;
      lt_item.tm_year = lt_day.tm_year;
      break;
    case RECUR_YEARLY:
      diff = lt_day.tm_year - lt_item.tm_year;
      if (diff % rpt_freq != 0)
	return (0);
      lt_item.tm_year = lt_day.tm_year;
      break;
    default:
      fputs (error, stderr);
      exit (EXIT_FAILURE);
    }
  start_date.dd = lt_item.tm_mday;
  start_date.mm = lt_item.tm_mon + 1;
  start_date.yyyy = lt_item.tm_year + 1900;
  item_start = date2sec (start_date, lt_item.tm_hour, lt_item.tm_min);

  if (item_start < day_end && item_start >= day_start)
    return (item_start);
  else
    return (0);
}

/* 
 * Delete a recurrent event from the list (if delete_whole is not null),
 * or delete only one occurence of the recurrent event. 
 */
void
recur_event_erase (long start, unsigned num, unsigned delete_whole,
		   erase_flag_e flag)
{
  unsigned n = 0;
  struct recur_event_s *i, **iptr;
  struct days_s *o, **j;

  iptr = &recur_elist;
  for (i = recur_elist; i != 0; i = i->next)
    {
      if (recur_item_inday (i->day, i->exc, i->rpt->type,
			    i->rpt->freq, i->rpt->until, start))
	{
	  if (n == num)
	    {
	      if (delete_whole)
		{
		  if (flag == ERASE_FORCE_ONLY_NOTE)
		    erase_note (&i->note, flag);
		  else
		    {
		      *iptr = i->next;
		      free (i->mesg);
		      free (i->rpt);
		      free (i->exc);
		      erase_note (&i->note, flag);
		      free (i);
		    }
		  return;
		}
	      else
		{
		  o = (struct days_s *) malloc (sizeof (struct days_s));
		  o->st = start;
		  j = &i->exc;
		  for (;;)
		    {
		      if (*j == 0 || (*j)->st > start)
			{
			  o->next = *j;
			  *j = o;
			  break;
			}
		      j = &(*j)->next;
		    }
		  return;
		}
	    }
	  n++;
	}
      iptr = &i->next;
    }
  /* NOTREACHED */
  fputs (_("FATAL ERROR in recur_event_erase: no such event\n"), stderr);
  exit (EXIT_FAILURE);
}

/*
 * Delete a recurrent appointment from the list (if delete_whole is not null),
 * or delete only one occurence of the recurrent appointment. 
 */
void
recur_apoint_erase (long start, unsigned num, unsigned delete_whole,
		    erase_flag_e flag)
{
  unsigned n = 0;
  recur_apoint_llist_node_t *i, **iptr;
  struct days_s *o, **j;
  int need_check_notify = 0;

  pthread_mutex_lock (&(recur_alist_p->mutex));
  iptr = &recur_alist_p->root;
  for (i = recur_alist_p->root; i != 0; i = i->next)
    {
      if (recur_item_inday (i->start, i->exc, i->rpt->type,
			    i->rpt->freq, i->rpt->until, start))
	{
	  if (n == num)
	    {
	      if (notify_bar () && flag != ERASE_FORCE_ONLY_NOTE)
		need_check_notify = notify_same_recur_item (i);
	      if (delete_whole)
		{
		  if (flag == ERASE_FORCE_ONLY_NOTE)
		    erase_note (&i->note, flag);
		  else
		    {
		      *iptr = i->next;
		      free (i->mesg);
		      free (i->rpt);
		      free (i->exc);
		      erase_note (&i->note, flag);
		      free (i);
		      pthread_mutex_unlock (&(recur_alist_p->mutex));
		      if (need_check_notify)
			notify_check_next_app ();
		    }
		  return;
		}
	      else
		{
		  o = (struct days_s *) malloc (sizeof (struct days_s));
		  o->st = start;
		  j = &i->exc;
		  for (;;)
		    {
		      if (*j == 0 || (*j)->st > start)
			{
			  o->next = *j;
			  *j = o;
			  break;
			}
		      j = &(*j)->next;
		    }
		  pthread_mutex_unlock (&(recur_alist_p->mutex));
		  if (need_check_notify)
		    notify_check_next_app ();
		  return;
		}
	    }
	  n++;
	}
      iptr = &i->next;
    }
  /* NOTREACHED */
  fputs (_("FATAL ERROR in recur_apoint_erase: no such appointment\n"),
	 stderr);
  exit (EXIT_FAILURE);
}

/*
 * Ask user for repetition characteristics:
 * 	o repetition type: daily, weekly, monthly, yearly
 *	o repetition frequence: every X days, weeks, ...
 *	o repetition end date
 * and then delete the selected item to recreate it as a recurrent one
 */
void
recur_repeat_item (conf_t *conf)
{
  struct tm *lt;
  time_t t;
  int ch = 0;
  int date_entered = 0;
  int year = 0, month = 0, day = 0;
  date_t until_date;
  char outstr[BUFSIZ];
  char user_input[BUFSIZ] = "";
  char *mesg_type_1 =
    _("Enter the repetition type: (D)aily, (W)eekly, (M)onthly, (Y)early");
  char *mesg_type_2 = _("[D/W/M/Y] ");
  char *mesg_freq_1 = _("Enter the repetition frequence:");
  char *mesg_wrong_freq = _("The frequence you entered is not valid.");
  char *mesg_until_1 =
    _("Enter the ending date: [%s] or '0' for an endless repetition");
  char *mesg_wrong_1 = _("The entered date is not valid.");
  char *mesg_wrong_2 =
    _("Possible formats are [%s] or '0' for an endless repetition");
  char *wrong_type_1 = _("This item is already a repeated one.");
  char *wrong_type_2 = _("Press [ENTER] to continue.");
  char *mesg_older =
    _("Sorry, the date you entered is older than the item start time.");
  int type = 0, freq = 0;
  int item_nb;
  struct day_item_s *p;
  recur_apoint_llist_node_t *ra;
  struct recur_event_s *re;
  long until, date;

  item_nb = apoint_hilt ();
  p = day_get_item (item_nb);
  if (p->type != APPT && p->type != EVNT)
    {
      status_mesg (wrong_type_1, wrong_type_2);
      ch = keys_getch (win[STA].p);
      return;
    }

  while ((ch != 'D') && (ch != 'W') && (ch != 'M')
	 && (ch != 'Y') && (ch != KEY_GENERIC_ESCAPE))
    {
      status_mesg (mesg_type_1, mesg_type_2);
      ch = keys_getch (win[STA].p);
      ch = toupper (ch);
    }
  if (ch == KEY_GENERIC_ESCAPE)
    {
      return;
    }
  else
    {
      type = recur_char2def (ch);
      ch = 0;
    }

  while (freq == 0)
    {
      status_mesg (mesg_freq_1, "");
      if (getstring (win[STA].p, user_input, BUFSIZ, 0, 1) == GETSTRING_VALID)
	{
	  freq = atoi (user_input);
	  if (freq == 0)
	    {
	      status_mesg (mesg_wrong_freq, wrong_type_2);
	      keys_getch (win[STA].p);
	    }
	  user_input[0] = '\0';
	}
      else
	return;
    }

  while (!date_entered)
    {
      snprintf (outstr, BUFSIZ, mesg_until_1,
		DATEFMT_DESC (conf->input_datefmt));
      status_mesg (_(outstr), "");
      if (getstring (win[STA].p, user_input, BUFSIZ, 0, 1) == GETSTRING_VALID)
	{
	  if (strlen (user_input) == 1 && strncmp (user_input, "0", 1) == 0)
	    {
	      until = 0;
	      date_entered = 1;
	    }
	  else
	    {
	      if (parse_date (user_input, conf->input_datefmt,
			      &year, &month, &day))
		{
		  t = p->start;
		  lt = localtime (&t);
		  until_date.dd = day;
		  until_date.mm = month;
		  until_date.yyyy = year;
		  until = date2sec (until_date, lt->tm_hour, lt->tm_min);
		  if (until < p->start)
		    {
		      status_mesg (mesg_older, wrong_type_2);
		      keys_getch (win[STA].p);
		      date_entered = 0;
		    }
		  else
		    {
		      date_entered = 1;
		    }
		}
	      else
		{
		  snprintf (outstr, BUFSIZ, mesg_wrong_2,
			    DATEFMT_DESC (conf->input_datefmt));
		  status_mesg (mesg_wrong_1, _(outstr));
		  keys_getch (win[STA].p);
		  date_entered = 0;
		}
	    }
	}
      else
	return;
    }

  date = calendar_get_slctd_day_sec ();
  if (p->type == EVNT)
    {
      re = recur_event_new (p->mesg, p->note, p->start, p->evnt_id,
			    type, freq, until, NULL);
    }
  else if (p->type == APPT)
    {
      ra = recur_apoint_new (p->mesg, p->note, p->start, p->appt_dur,
			     p->state, type, freq, until, NULL);
      if (notify_bar ())
	notify_check_repeated (ra);
    }
  else
    {				/* NOTREACHED */
      fputs (_("FATAL ERROR in recur_repeat_item: wrong item type\n"),
	     stderr);
      exit (EXIT_FAILURE);
    }
  day_erase_item (date, item_nb, ERASE_FORCE_KEEP_NOTE);
}

/* 
 * Read days for which recurrent items must not be repeated
 * (such days are called exceptions).
 */
struct days_s *
recur_exc_scan (FILE *data_file)
{
  int c = 0;
  struct tm *lt, day;
  time_t t;
  struct days_s *exc_head, *exc;

  exc_head = NULL;
  t = time (NULL);
  lt = localtime (&t);
  day = *lt;
  while ((c = getc (data_file)) == '!')
    {
      ungetc (c, data_file);
      if (fscanf (data_file, "!%u / %u / %u ",
		  &day.tm_mon, &day.tm_mday, &day.tm_year) != 3)
	{
	  fputs (_("FATAL ERROR in recur_exc_scan: "
		   "syntax error in the item date\n"), stderr);
	  exit (EXIT_FAILURE);
	}
      day.tm_sec = 0;
      day.tm_isdst = -1;
      day.tm_year -= 1900;
      day.tm_mon--;
      exc = (struct days_s *) malloc (sizeof (struct days_s));
      exc->st = mktime (&day);
      exc->next = exc_head;
      exc_head = exc;
    }
  return (exc_head);
}

/*
 * Look in the appointment list if we have an item which starts before the item
 * stored in the notify_app structure (which is the next item to be notified).
 */
struct notify_app_s *
recur_apoint_check_next (struct notify_app_s *app, long start, long day)
{
  recur_apoint_llist_node_t *i;
  long real_recur_start_time;

  pthread_mutex_lock (&(recur_alist_p->mutex));
  for (i = recur_alist_p->root; i != 0; i = i->next)
    {
      if (i->start > app->time)
	{
	  pthread_mutex_unlock (&(recur_alist_p->mutex));
	  return (app);
	}
      else
	{
	  real_recur_start_time =
            recur_item_inday (i->start, i->exc, i->rpt->type, i->rpt->freq,
                              i->rpt->until, day);
	  if (real_recur_start_time > start)
	    {
	      app->time = real_recur_start_time;
	      app->txt = mycpy (i->mesg);
	      app->state = i->state;
	      app->got_app = 1;
	    }
	}
    }
  pthread_mutex_unlock (&(recur_alist_p->mutex));

  return (app);
}

/* Returns a structure containing the selected recurrent appointment. */
recur_apoint_llist_node_t *
recur_get_apoint (long date, int num)
{
  recur_apoint_llist_node_t *o;
  int n = 0;

  pthread_mutex_lock (&(recur_alist_p->mutex));
  for (o = recur_alist_p->root; o != 0; o = o->next)
    {
      if (recur_item_inday (o->start, o->exc, o->rpt->type,
			    o->rpt->freq, o->rpt->until, date))
	{
	  if (n == num)
	    {
	      pthread_mutex_unlock (&(recur_alist_p->mutex));
	      return (o);
	    }
	  n++;
	}
    }
  /* NOTREACHED */
  fputs (_("FATAL ERROR in recur_get_apoint: no such item\n"), stderr);
  exit (EXIT_FAILURE);
}

/* Returns a structure containing the selected recurrent event. */
struct recur_event_s *
recur_get_event (long date, int num)
{
  struct recur_event_s *o;
  int n = 0;

  for (o = recur_elist; o != 0; o = o->next)
    {
      if (recur_item_inday (o->day, o->exc, o->rpt->type,
			    o->rpt->freq, o->rpt->until, date))
	{
	  if (n == num)
	    {
	      return (o);
	    }
	  n++;
	}
    }
  /* NOTREACHED */
  fputs (_("FATAL ERROR in recur_get_event: no such item\n"), stderr);
  exit (EXIT_FAILURE);
}

/* Switch recurrent item notification state. */
void
recur_apoint_switch_notify (long date, int recur_nb)
{
  int n, need_chk_notify;
  recur_apoint_llist_node_t *o;

  n = 0;
  need_chk_notify = 0;

  pthread_mutex_lock (&(recur_alist_p->mutex));
  for (o = recur_alist_p->root; o != 0; o = o->next)
    {
      if (recur_item_inday (o->start, o->exc, o->rpt->type,
			    o->rpt->freq, o->rpt->until, date))
	{
	  if (n == recur_nb)
	    {
	      o->state ^= APOINT_NOTIFY;

	      if (notify_bar ())
		notify_check_repeated (o);

	      pthread_mutex_unlock (&(recur_alist_p->mutex));
	      if (need_chk_notify)
		notify_check_next_app ();
	      return;
	    }
	  n++;
	}
    }
  /* NOTREACHED */
  fputs (_("FATAL ERROR in recur_apoint_switch_notify: no such item\n"),
	 stderr);
  exit (EXIT_FAILURE);
}