webcit/calendar.c

   1 /*
   2  * $Id$
   3  *
   4  * Functions which handle calendar objects and their processing/display.
   5  */
   6
   7 #include "webcit.h"
   8 #include "webserver.h"
   9 #include "calendar.h"
  10
  11 /*
  12  * Process a calendar object.  At this point it's already been deserialized by cal_process_attachment()
  13  *
  14  * cal:                 the calendar object
  15  * recursion_level:     Number of times we've recursed into this function
  16  * msgnum:              Message number on the Citadel server
  17  * cal_partnum:         MIME part number within that message containing the calendar object
  18  */
  19 void cal_process_object(StrBuf *Target,
  20                         icalcomponent *cal,
  21                         int recursion_level,
  22                         long msgnum,
  23                         const char *cal_partnum)
  24 {
  25         icalcomponent *c;
  26         icalproperty *method = NULL;
  27         icalproperty_method the_method = ICAL_METHOD_NONE;
  28         icalproperty *p;
  29         struct icaltimetype t;
  30         time_t tt;
  31         char buf[256];
  32         char conflict_name[256];
  33         char conflict_message[256];
  34         int is_update = 0;
  35         char divname[32];
  36         static int divcount = 0;
  37
  38         sprintf(divname, "rsvp%04x", ++divcount);
  39
  40         /* Convert timezones to something easy to display.
  41          * It's safe to do this in memory because we're only changing it on the
  42          * display side -- when we tell the server to do something with the object,
  43          * the server will be working with its original copy in the database.
  44          */
  45         if ((cal) && (recursion_level == 0)) {
  46                 ical_dezonify(cal);
  47         }
  48
  49         /* Leading HTML for the display of this object */
  50         if (recursion_level == 0) {
  51                 StrBufAppendPrintf(Target, "<div class=\"mimepart\">\n");
  52         }
  53
  54         /* Look for a method */
  55         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  56
  57         /* See what we need to do with this */
  58         if (method != NULL) {
  59                 char *title;
  60                 the_method = icalproperty_get_method(method);
  61
  62                 StrBufAppendPrintf(Target, "<div id=\"%s_title\">", divname);
  63                 StrBufAppendPrintf(Target, "<img src=\"static/calarea_48x.gif\">");
  64                 StrBufAppendPrintf(Target, "<span>");
  65                 switch(the_method) {
  66                 case ICAL_METHOD_REQUEST:
  67                         title = _("Meeting invitation");
  68                         break;
  69                 case ICAL_METHOD_REPLY:
  70                         title = _("Attendee's reply to your invitation");
  71                         break;
  72                 case ICAL_METHOD_PUBLISH:
  73                         title = _("Published event");
  74                         break;
  75                 default:
  76                         title = _("This is an unknown type of calendar item.");
  77                         break;
  78                 }
  79                 StrBufAppendPrintf(Target, "</span>");
  80
  81                 StrBufAppendPrintf(Target, "&nbsp;&nbsp;%s",title);
  82                 StrBufAppendPrintf(Target, "</div>");
  83         }
  84
  85         StrBufAppendPrintf(Target, "<dl>");
  86         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
  87         if (p != NULL) {
  88                 StrBufAppendPrintf(Target, "<dt>");
  89                 StrBufAppendPrintf(Target, _("Summary:"));
  90                 StrBufAppendPrintf(Target, "</dt><dd>");
  91                 StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
  92                 StrBufAppendPrintf(Target, "</dd>\n");
  93         }
  94
  95         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
  96         if (p != NULL) {
  97                 StrBufAppendPrintf(Target, "<dt>");
  98                 StrBufAppendPrintf(Target, _("Location:"));
  99                 StrBufAppendPrintf(Target, "</dt><dd>");
 100                 StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
 101                 StrBufAppendPrintf(Target, "</dd>\n");
 102         }
 103
 104         /*
 105          * Only show start/end times if we're actually looking at the VEVENT
 106          * component.  Otherwise it shows bogus dates for things like timezone.
 107          */
 108         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 109
 110                 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
 111                 if (p != NULL) {
 112                         t = icalproperty_get_dtstart(p);
 113
 114                         if (t.is_date) {
 115                                 struct tm d_tm;
 116                                 char d_str[32];
 117                                 memset(&d_tm, 0, sizeof d_tm);
 118                                 d_tm.tm_year = t.year - 1900;
 119                                 d_tm.tm_mon = t.month - 1;
 120                                 d_tm.tm_mday = t.day;
 121                                 wc_strftime(d_str, sizeof d_str, "%x", &d_tm);
 122                                 StrBufAppendPrintf(Target, "<dt>");
 123                                 StrBufAppendPrintf(Target, _("Date:"));
 124                                 StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", d_str);
 125                         }
 126                         else {
 127                                 tt = icaltime_as_timet(t);
 128                                 webcit_fmt_date(buf, 256, tt, DATEFMT_FULL);
 129                                 StrBufAppendPrintf(Target, "<dt>");
 130                                 StrBufAppendPrintf(Target, _("Starting date/time:"));
 131                                 StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", buf);
 132                         }
 133                 }
 134
 135                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 136                 if (p != NULL) {
 137                         t = icalproperty_get_dtend(p);
 138                         tt = icaltime_as_timet(t);
 139                         webcit_fmt_date(buf, 256, tt, DATEFMT_FULL);
 140                         StrBufAppendPrintf(Target, "<dt>");
 141                         StrBufAppendPrintf(Target, _("Ending date/time:"));
 142                         StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", buf);
 143                 }
 144
 145         }
 146
 147         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 148         if (p != NULL) {
 149                 StrBufAppendPrintf(Target, "<dt>");
 150                 StrBufAppendPrintf(Target, _("Description:"));
 151                 StrBufAppendPrintf(Target, "</dt><dd>");
 152                 StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
 153                 StrBufAppendPrintf(Target, "</dd>\n");
 154         }
 155
 156         if (icalcomponent_get_first_property(cal, ICAL_RRULE_PROPERTY)) {
 157                 /* Unusual string syntax used here in order to re-use existing translations */
 158                 StrBufAppendPrintf(Target, "<dt>%s:</dt><dd>%s.</dd>\n",
 159                         _("Recurrence"),
 160                         _("This is a recurring event")
 161                 );
 162         }
 163
 164         /* If the component has attendees, iterate through them. */
 165         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY);
 166              (p != NULL);
 167              p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 168                 StrBufAppendPrintf(Target, "<dt>");
 169                 StrBufAppendPrintf(Target, _("Attendee:"));
 170                 StrBufAppendPrintf(Target, "</dt><dd>");
 171                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
 172                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 173
 174                         /** screen name or email address */
 175                         strcpy(buf, &buf[7]);
 176                         striplt(buf);
 177                         StrEscAppend(Target, NULL, buf, 0, 0);
 178                         StrBufAppendPrintf(Target, " ");
 179
 180                         /** participant status */
 181                         partstat_as_string(buf, p);
 182                         StrEscAppend(Target, NULL, buf, 0, 0);
 183                 }
 184                 StrBufAppendPrintf(Target, "</dd>\n");
 185         }
 186
 187         /* If the component has subcomponents, recurse through them. */
 188         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 189              (c != 0);
 190              c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 191                 /* Recursively process subcomponent */
 192                 cal_process_object(Target, c, recursion_level+1, msgnum, cal_partnum);
 193         }
 194
 195         /* If this is a REQUEST, display conflicts and buttons */
 196         if (the_method == ICAL_METHOD_REQUEST) {
 197
 198                 /* Check for conflicts */
 199                 lprintf(9, "Checking server calendar for conflicts...\n");
 200                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 201                 serv_getln(buf, sizeof buf);
 202                 if (buf[0] == '1') {
 203                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 204                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 205                                 is_update = extract_int(buf, 4);
 206
 207                                 if (is_update) {
 208                                         snprintf(conflict_message, sizeof conflict_message,
 209                                                  _("This is an update of '%s' which is already in your calendar."), conflict_name);
 210                                 }
 211                                 else {
 212                                         snprintf(conflict_message, sizeof conflict_message,
 213                                                  _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
 214                                 }
 215
 216                                 StrBufAppendPrintf(Target, "<dt>%s",
 217                                         (is_update ?
 218                                          _("Update:") :
 219                                          _("CONFLICT:")
 220                                                 )
 221                                         );
 222                                 StrBufAppendPrintf(Target, "</dt><dd>");
 223                                 StrEscAppend(Target, NULL, conflict_message, 0, 0);
 224                                 StrBufAppendPrintf(Target, "</dd>\n");
 225                         }
 226                 }
 227                 lprintf(9, "...done.\n");
 228
 229                 StrBufAppendPrintf(Target, "</dl>");
 230
 231                 /* Display the Accept/Decline buttons */
 232                 StrBufAppendPrintf(Target, "<p id=\"%s_question\">"
 233                         "%s "
 234                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 235                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Accept');\">%s</a>"
 236                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 237                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Tentative');\">%s</a>"
 238                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 239                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Decline');\">%s</a>"
 240                         "</span></p>\n",
 241                         divname,
 242                         _("How would you like to respond to this invitation?"),
 243                         divname, divname, msgnum, cal_partnum, _("Accept"),
 244                         divname, divname, msgnum, cal_partnum, _("Tentative"),
 245                         divname, divname, msgnum, cal_partnum, _("Decline")
 246                         );
 247
 248         }
 249
 250         /* If this is a REPLY, display update button */
 251         if (the_method == ICAL_METHOD_REPLY) {
 252
 253                 /* Display the update buttons */
 254                 StrBufAppendPrintf(Target, "<p id=\"%s_question\" >"
 255                         "%s "
 256                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 257                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Update');\">%s</a>"
 258                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 259                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Ignore');\">%s</a>"
 260                         "</span></p>\n",
 261                         divname,
 262                         _("Click <i>Update</i> to accept this reply and update your calendar."),
 263                         divname, divname, msgnum, cal_partnum, _("Update"),
 264                         divname, divname, msgnum, cal_partnum, _("Ignore")
 265                         );
 266
 267         }
 268
 269         /* Trailing HTML for the display of this object */
 270         if (recursion_level == 0) {
 271                 StrBufAppendPrintf(Target, "<p>&nbsp;</p></div>\n");
 272         }
 273 }
 274
 275
 276 /*
 277  * Deserialize a calendar object in a message so it can be displayed.
 278  */
 279 void cal_process_attachment(wc_mime_attachment *Mime)
 280 {
 281         icalcomponent *cal;
 282
 283         cal = icalcomponent_new_from_string(ChrPtr(Mime->Data));
 284         FlushStrBuf(Mime->Data);
 285         if (cal == NULL) {
 286                 StrBufAppendPrintf(Mime->Data, _("There was an error parsing this calendar item."));
 287                 StrBufAppendPrintf(Mime->Data, "<br />\n");
 288                 return;
 289         }
 290
 291         cal_process_object(Mime->Data, cal, 0, Mime->msgnum, ChrPtr(Mime->PartNum));
 292
 293         /* Free the memory we obtained from libical's constructor */
 294         icalcomponent_free(cal);
 295 }
 296
 297
 298
 299
 300 /*
 301  * Respond to a meeting request - accept/decline meeting
 302  */
 303 void respond_to_request(void)
 304 {
 305         char buf[1024];
 306
 307         begin_ajax_response();
 308
 309         serv_printf("ICAL respond|%s|%s|%s|",
 310                 bstr("msgnum"),
 311                 bstr("cal_partnum"),
 312                 bstr("sc")
 313         );
 314         serv_getln(buf, sizeof buf);
 315
 316         if (buf[0] == '2') {
 317                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 318                 if (!strcasecmp(bstr("sc"), "accept")) {
 319                         wprintf(_("You have accepted this meeting invitation.  "
 320                                 "It has been entered into your calendar.")
 321                         );
 322                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 323                         wprintf(_("You have tentatively accepted this meeting invitation.  "
 324                                 "It has been 'pencilled in' to your calendar.")
 325                         );
 326                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 327                         wprintf(_("You have declined this meeting invitation.  "
 328                                   "It has <b>not</b> been entered into your calendar.")
 329                                 );
 330                 }
 331                 wprintf(" ");
 332                 wprintf(_("A reply has been sent to the meeting organizer."));
 333                 wprintf("</span>");
 334         } else {
 335                 wprintf("<img align=\"center\" src=\"static/error.gif\"><span>");
 336                 wprintf("%s\n", &buf[4]);
 337                 wprintf("</span>");
 338         }
 339
 340         end_ajax_response();
 341 }
 342
 343
 344
 345 /*
 346  * Handle an incoming RSVP
 347  */
 348 void handle_rsvp(void)
 349 {
 350         char buf[1024];
 351
 352         begin_ajax_response();
 353
 354         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 355                 bstr("msgnum"),
 356                 bstr("cal_partnum"),
 357                 bstr("sc")
 358         );
 359         serv_getln(buf, sizeof buf);
 360
 361         if (buf[0] == '2') {
 362                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 363                 if (!strcasecmp(bstr("sc"), "update")) {
 364                         wprintf(_("Your calendar has been updated to reflect this RSVP."));
 365                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 366                         wprintf(_("You have chosen to ignore this RSVP. "
 367                                   "Your calendar has <b>not</b> been updated.")
 368                                 );
 369                 }
 370                 wprintf("</span>");
 371         } else {
 372                 wprintf("<img src=\"static/error.gif\"><span> %s\n", &buf[4]);
 373                 wprintf("</span>");
 374         }
 375
 376         end_ajax_response();
 377 }
 378
 379
 380
 381
 382 /*
 383  * free memory allocated using libical
 384  */
 385 void delete_cal(void *vCal)
 386 {
 387         disp_cal *Cal = (disp_cal*) vCal;
 388         icalcomponent_free(Cal->cal);
 389         free(Cal->from);
 390         free(Cal);
 391 }
 392
 393 /*
 394  * This is the meat-and-bones of the first part of our two-phase calendar display.
 395  * As we encounter calendar items in messages being read from the server, we break out
 396  * any iCalendar objects and store them in a hash table.  Later on, the second phase will
 397  * use this hash table to render the calendar for display.
 398  */
 399 void display_individual_cal(icalcomponent *cal, long msgnum, char *from, int unread, calview *calv)
 400 {
 401         icalproperty *ps = NULL;
 402         struct icaltimetype dtstart, dtend;
 403         struct icaldurationtype dur;
 404         wcsession *WCC = WC;
 405         disp_cal *Cal;
 406         size_t len;
 407         time_t final_recurrence = 0;
 408         icalcomponent *cptr = NULL;
 409
 410         /* recur variables */
 411         icalproperty *rrule = NULL;
 412         struct icalrecurrencetype recur;
 413         icalrecur_iterator *ritr = NULL;
 414         struct icaltimetype next;
 415         int num_recur = 0;
 416         int stop_rr = 0;
 417
 418         dtstart = icaltime_null_time();
 419         dtend = icaltime_null_time();
 420
 421         if (WCC->disp_cal_items == NULL)
 422                 WCC->disp_cal_items = NewHash(0, Flathash);
 423
 424         /* Note: anything we do here, we also have to do below for the recurrences. */
 425         Cal = (disp_cal*) malloc(sizeof(disp_cal));
 426         memset(Cal, 0, sizeof(disp_cal));
 427         Cal->cal = icalcomponent_new_clone(cal);
 428
 429         /* Dezonify and decapsulate at the very last moment */
 430         /* lprintf(9, "INITIAL: %s\n", icaltime_as_ical_string(icalproperty_get_dtstart(
 431                 icalcomponent_get_first_property(icalcomponent_get_first_component(
 432                 Cal->cal, ICAL_VEVENT_COMPONENT), ICAL_DTSTART_PROPERTY)))
 433         ); */
 434         ical_dezonify(Cal->cal);
 435         if (icalcomponent_isa(Cal->cal) != ICAL_VEVENT_COMPONENT) {
 436                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 437                 if (cptr) {
 438                         cptr = icalcomponent_new_clone(cptr);
 439                         icalcomponent_free(Cal->cal);
 440                         Cal->cal = cptr;
 441                 }
 442         }
 443
 444         Cal->unread = unread;
 445         len = strlen(from);
 446         Cal->from = (char*)malloc(len+ 1);
 447         memcpy(Cal->from, from, len + 1);
 448         Cal->cal_msgnum = msgnum;
 449
 450         /* Precalculate the starting date and time of this event, and store it in our top-level
 451          * structure.  Later, when we are rendering the calendar, we can just peek at these values
 452          * without having to break apart every calendar item.
 453          */
 454         ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTSTART_PROPERTY);
 455         if (ps != NULL) {
 456                 dtstart = icalproperty_get_dtstart(ps);
 457                 Cal->event_start = icaltime_as_timet(dtstart);
 458         }
 459
 460         /* Do the same for the ending date and time.  It makes the day view much easier to render. */
 461         ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTEND_PROPERTY);
 462         if (ps != NULL) {
 463                 dtend = icalproperty_get_dtend(ps);
 464                 Cal->event_end = icaltime_as_timet(dtend);
 465         }
 466
 467         /* Store it in the hash list. */
 468         Put(WCC->disp_cal_items,
 469             (char*) &Cal->event_start,
 470             sizeof(Cal->event_start),
 471             Cal,
 472             delete_cal);
 473
 474         /****************************** handle recurring events ******************************/
 475
 476         if (icaltime_is_null_time(dtstart)) return;     /* Can't recur without a start time */
 477
 478         if (!icaltime_is_null_time(dtend)) {            /* Need duration for recurrences */
 479                 dur = icaltime_subtract(dtend, dtstart);
 480         }
 481
 482         /*
 483          * Just let libical iterate the recurrence, and keep looping back to the top of this function,
 484          * adding new hash entries that all point back to the same msgnum, until either the iteration
 485          * stops or some outer bound is reached.  The display code will automatically do the Right Thing.
 486          */
 487         cptr = cal;
 488         if (icalcomponent_isa(cptr) != ICAL_VEVENT_COMPONENT) {
 489                 cptr = icalcomponent_get_first_component(cptr, ICAL_VEVENT_COMPONENT);
 490         }
 491         if (!cptr) return;
 492         ps = icalcomponent_get_first_property(cptr, ICAL_DTSTART_PROPERTY);
 493         if (ps == NULL) return;
 494         dtstart = icalproperty_get_dtstart(ps);
 495         rrule = icalcomponent_get_first_property(cptr, ICAL_RRULE_PROPERTY);
 496         if (!rrule) return;
 497         recur = icalproperty_get_rrule(rrule);
 498         ritr = icalrecur_iterator_new(recur, dtstart);
 499         if (!ritr) return;
 500
 501         while (next = icalrecur_iterator_next(ritr), ((!icaltime_is_null_time(next))&&(!stop_rr)) ) {
 502                 ++num_recur;
 503                 if (num_recur > 1) {            /* Skip the first one.  We already did it at the root. */
 504                         icalcomponent *cptr;
 505                         /* lprintf(9, "REPEATS: %s\n", icaltime_as_ical_string(next)); */
 506
 507                         /* Note: anything we do here, we also have to do above for the root event. */
 508                         Cal = (disp_cal*) malloc(sizeof(disp_cal));
 509                         memset(Cal, 0, sizeof(disp_cal));
 510                         Cal->cal = icalcomponent_new_clone(cal);
 511                         Cal->unread = unread;
 512                         len = strlen(from);
 513                         Cal->from = (char*)malloc(len+ 1);
 514                         memcpy(Cal->from, from, len + 1);
 515                         Cal->cal_msgnum = msgnum;
 516
 517                         if (icalcomponent_isa(Cal->cal) == ICAL_VEVENT_COMPONENT) {
 518                                 cptr = Cal->cal;
 519                         }
 520                         else {
 521                                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 522                         }
 523                         if (cptr) {
 524                                 ps = icalcomponent_get_first_property(cptr, ICAL_DTSTART_PROPERTY);
 525                                 if (ps != NULL) {
 526                                         icalcomponent_remove_property(cptr, ps);
 527                                         ps = icalproperty_new_dtstart(next);
 528                                         icalcomponent_add_property(cptr, ps);
 529
 530                                         Cal->event_start = icaltime_as_timet(next);
 531                                         final_recurrence = Cal->event_start;
 532                                 }
 533
 534                                 ps = icalcomponent_get_first_property(cptr, ICAL_DTEND_PROPERTY);
 535                                 if (ps != NULL) {
 536                                         icalcomponent_remove_property(cptr, ps);
 537
 538                                         /* Make a new dtend */
 539                                         ps = icalproperty_new_dtend(icaltime_add(next, dur));
 540
 541                                         /* and stick it somewhere */
 542                                         icalcomponent_add_property(cptr, ps);
 543                                 }
 544
 545                         }
 546
 547                         /* Dezonify and decapsulate at the very last moment */
 548                         ical_dezonify(Cal->cal);
 549                         if (icalcomponent_isa(Cal->cal) != ICAL_VEVENT_COMPONENT) {
 550                                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 551                                 if (cptr) {
 552                                         cptr = icalcomponent_new_clone(cptr);
 553                                         icalcomponent_free(Cal->cal);
 554                                         Cal->cal = cptr;
 555                                 }
 556                         }
 557
 558                         if ( (Cal->event_start > calv->lower_bound)
 559                            && (Cal->event_start < calv->upper_bound) ) {
 560                                 Put(WCC->disp_cal_items,
 561                                         (char*) &Cal->event_start,
 562                                         sizeof(Cal->event_start),
 563                                         Cal,
 564                                         delete_cal
 565                                 );
 566                         }
 567                         else {
 568                                 delete_cal(Cal);
 569                         }
 570
 571                         /* If an upper bound is set, stop when we go out of scope */
 572                         if (final_recurrence > calv->upper_bound) stop_rr = 1;
 573                 }
 574         }
 575         icalrecur_iterator_free(ritr);
 576         /* lprintf(9, "Performed %d recurrences; final one is %s", num_recur, ctime(&final_recurrence)); */
 577
 578 }
 579
 580
 581
 582
 583
 584
 585 void process_ical_object(long msgnum, int unread,
 586                          char *from,
 587                          char *FlatIcal,
 588                          icalcomponent_kind which_kind,
 589                          IcalCallbackFunc CallBack,
 590                          calview *calv
 591         )
 592 {
 593         icalcomponent *cal, *c;
 594
 595         cal = icalcomponent_new_from_string(FlatIcal);
 596         if (cal != NULL) {
 597
 598                 /* A which_kind of (-1) means just load the whole thing */
 599                 if (which_kind == (-1)) {
 600                         CallBack(cal, msgnum, from, unread, calv);
 601                 }
 602
 603                 /* Otherwise recurse and hunt */
 604                 else {
 605
 606                         /* Simple components of desired type */
 607                         if (icalcomponent_isa(cal) == which_kind) {
 608                                 CallBack(cal, msgnum, from, unread, calv);
 609                         }
 610
 611                         /* Subcomponents of desired type */
 612                         for (c = icalcomponent_get_first_component(cal, which_kind);
 613                              (c != 0);
 614                              c = icalcomponent_get_next_component(cal, which_kind)) {
 615                                 CallBack(c, msgnum, from, unread, calv);
 616                         }
 617
 618                 }
 619
 620                 icalcomponent_free(cal);
 621         }
 622 }
 623
 624 /*
 625  * Code common to all icalendar display handlers.  Given a message number and a MIME
 626  * type, we load the message and hunt for that MIME type.  If found, we load
 627  * the relevant part, deserialize it into a libical component, filter it for
 628  * the requested object type, and feed it to the specified handler.
 629  */
 630 void load_ical_object(long msgnum, int unread,
 631                       icalcomponent_kind which_kind,
 632                       IcalCallbackFunc CallBack,
 633                       calview *calv,
 634                       int RenderAsync
 635         )
 636 {
 637         StrBuf *Buf;
 638         StrBuf *Data = NULL;
 639         const char *bptr;
 640         int Done = 0;
 641         char from[128] = "";
 642         char mime_partnum[256];
 643         char mime_filename[256];
 644         char mime_content_type[256];
 645         char mime_disposition[256];
 646         int mime_length;
 647         char relevant_partnum[256];
 648         char *relevant_source = NULL;
 649         int phase = 0;                          /* 0 = citadel headers, 1 = mime headers, 2 = body */
 650         char msg4_content_type[256] = "";
 651         char msg4_content_encoding[256] = "";
 652         int msg4_content_length = 0;
 653
 654         relevant_partnum[0] = '\0';
 655         serv_printf("MSG4 %ld", msgnum);        /* we need the mime headers */
 656         Buf = NewStrBuf();
 657         StrBuf_ServGetln(Buf);
 658         if (GetServerStatus(Buf, NULL) != 1) {
 659                 FreeStrBuf (&Buf);
 660                 return;
 661         }
 662         while (!Done && (StrBuf_ServGetln(Buf)>=0)) {
 663                 if ( (StrLength(Buf)==3) &&
 664                      !strcmp(ChrPtr(Buf), "000")) {
 665                         Done = 1;
 666                         break;
 667                 }
 668                 bptr = ChrPtr(Buf);
 669                 switch (phase) {
 670                 case 0:
 671                         if (!strncasecmp(bptr, "part=", 5)) {
 672                                 extract_token(mime_filename, &bptr[5], 1, '|', sizeof mime_filename);
 673                                 extract_token(mime_partnum, &bptr[5], 2, '|', sizeof mime_partnum);
 674                                 extract_token(mime_disposition, &bptr[5], 3, '|', sizeof mime_disposition);
 675                                 extract_token(mime_content_type, &bptr[5], 4, '|', sizeof mime_content_type);
 676                                 mime_length = extract_int(&bptr[5], 5);
 677
 678                                 if (  (!strcasecmp(mime_content_type, "text/calendar"))
 679                                       || (!strcasecmp(mime_content_type, "application/ics"))
 680                                       || (!strcasecmp(mime_content_type, "text/vtodo"))
 681                                       || (!strcasecmp(mime_content_type, "text/todo"))
 682                                         ) {
 683                                         strcpy(relevant_partnum, mime_partnum);
 684                                 }
 685                         }
 686                         else if (!strncasecmp(bptr, "from=", 4)) {
 687                                 extract_token(from, bptr, 1, '=', sizeof(from));
 688                         }
 689                         else if ((phase == 0) && (!strncasecmp(bptr, "text", 4))) {
 690                                 phase = 1;
 691                         }
 692                 break;
 693                 case 1:
 694                         if (!IsEmptyStr(bptr)) {
 695                                 if (!strncasecmp(bptr, "Content-type: ", 14)) {
 696                                         safestrncpy(msg4_content_type, &bptr[14], sizeof msg4_content_type);
 697                                         striplt(msg4_content_type);
 698                                 }
 699                                 else if (!strncasecmp(bptr, "Content-transfer-encoding: ", 27)) {
 700                                         safestrncpy(msg4_content_encoding, &bptr[27], sizeof msg4_content_encoding);
 701                                         striplt(msg4_content_type);
 702                                 }
 703                                 else if ((!strncasecmp(bptr, "Content-length: ", 16))) {
 704                                         msg4_content_length = atoi(&bptr[16]);
 705                                 }
 706                                 break;
 707                         }
 708                         else {
 709                                 phase++;
 710
 711                                 if ((msg4_content_length > 0)
 712                                     && ( !strcasecmp(msg4_content_encoding, "7bit"))
 713                                     && ((!strcasecmp(mime_content_type, "text/calendar"))
 714                                         || (!strcasecmp(mime_content_type, "application/ics"))
 715                                         || (!strcasecmp(mime_content_type, "text/vtodo"))
 716                                         || (!strcasecmp(mime_content_type, "text/todo"))
 717                                             )
 718                                         )
 719                                 {
 720                                 }
 721                         }
 722                 case 2:
 723                         if (Data == NULL)
 724                                 Data = NewStrBufPlain(NULL, msg4_content_length * 2);
 725                         if (msg4_content_length > 0) {
 726                                 StrBuf_ServGetBLOBBuffered(Data, msg4_content_length);
 727                                 phase ++;
 728                         }
 729                         else {
 730                                 StrBufAppendBuf(Data, Buf, 0);
 731                                 StrBufAppendBufPlain(Data, "\r\n", 1, 0);
 732                         }
 733                 case 3:
 734                         StrBufAppendBuf(Data, Buf, 0);
 735                 }
 736         }
 737         FreeStrBuf(&Buf);
 738
 739         /* If MSG4 didn't give us the part we wanted, but we know that we can find it
 740          * as one of the other MIME parts, attempt to load it now.
 741          */
 742         if ((Data == NULL) && (!IsEmptyStr(relevant_partnum))) {
 743                 Data = load_mimepart(msgnum, relevant_partnum);
 744         }
 745
 746         if (Data != NULL) {
 747                 relevant_source = (char*) ChrPtr(Data);
 748                 process_ical_object(msgnum, unread,
 749                                     from,
 750                                     relevant_source,
 751                                     which_kind,
 752                                     CallBack,
 753                                     calv);
 754         }
 755         FreeStrBuf (&Data);
 756
 757         icalmemory_free_ring();
 758 }
 759
 760 /*
 761  * Display a calendar item
 762  */
 763 int calendar_LoadMsgFromServer(SharedMessageStatus *Stat,
 764                                void **ViewSpecific,
 765                                message_summary* Msg,
 766                                int is_new,
 767                                int i)
 768 {
 769         calview *c = (calview*) *ViewSpecific;
 770         load_ical_object(Msg->msgnum, is_new, (-1), display_individual_cal, c, 1);
 771         return 0;
 772 }
 773
 774 /*
 775  * display the editor component for an event
 776  */
 777 void display_edit_event(void) {
 778         long msgnum = 0L;
 779
 780         msgnum = lbstr("msgnum");
 781         if (msgnum > 0L) {
 782                 /* existing event */
 783                 load_ical_object(msgnum, 0, ICAL_VEVENT_COMPONENT, display_edit_individual_event, NULL, 0);
 784         }
 785         else {
 786                 /* new event */
 787                 display_edit_individual_event(NULL, 0L, "", 0, NULL);
 788         }
 789 }
 790
 791 /*
 792  * save an edited event
 793  */
 794 void save_event(void) {
 795         long msgnum = 0L;
 796
 797         msgnum = lbstr("msgnum");
 798
 799         if (msgnum > 0L) {
 800                 load_ical_object(msgnum, 0, (-1), save_individual_event, NULL, 0);
 801         }
 802         else {
 803                 save_individual_event(NULL, 0L, "", 0, NULL);
 804         }
 805 }
 806
 807
 808
 809
 810
 811 /*
 812  * Anonymous request of freebusy data for a user
 813  */
 814 void do_freebusy(void)
 815 {
 816         const char *req = ChrPtr(WC->Hdr->HR.ReqLine);
 817         char who[SIZ];
 818         char buf[SIZ];
 819         int len;
 820         long lines;
 821
 822         extract_token(who, req, 0, ' ', sizeof who);
 823         if (!strncasecmp(who, "/freebusy/", 10)) {
 824                 strcpy(who, &who[10]);
 825         }
 826         unescape_input(who);
 827
 828         len = strlen(who);
 829         if ( (!strcasecmp(&who[len-4], ".vcf"))
 830              || (!strcasecmp(&who[len-4], ".ifb"))
 831              || (!strcasecmp(&who[len-4], ".vfb")) ) {
 832                 who[len-4] = 0;
 833         }
 834
 835         lprintf(9, "freebusy requested for <%s>\n", who);
 836         serv_printf("ICAL freebusy|%s", who);
 837         serv_getln(buf, sizeof buf);
 838
 839         if (buf[0] != '1') {
 840                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
 841                 output_headers(0, 0, 0, 0, 0, 0);
 842                 hprintf("Content-Type: text/plain\r\n");
 843                 wprintf("%s\n", &buf[4]);
 844                 end_burst();
 845                 return;
 846         }
 847
 848         read_server_text(WC->WBuf, &lines);
 849         http_transmit_thing("text/calendar", 0);
 850 }
 851
 852
 853
 854 int calendar_Cleanup(void **ViewSpecific)
 855 {
 856         calview *c;
 857
 858         c = (calview *) *ViewSpecific;
 859
 860         wDumpContent(1);
 861         free (c);
 862         *ViewSpecific = NULL;
 863
 864         return 0;
 865 }
 866
 867 int __calendar_Cleanup(void **ViewSpecific)
 868 {
 869         calview *c;
 870
 871         c = (calview *) *ViewSpecific;
 872
 873         free (c);
 874         *ViewSpecific = NULL;
 875
 876         return 0;
 877 }
 878
 879
 880 void
 881 InitModule_CALENDAR
 882 (void)
 883 {
 884         RegisterReadLoopHandlerset(
 885                 VIEW_CALENDAR,
 886                 calendar_GetParamsGetServerCall,
 887                 NULL,
 888                 calendar_LoadMsgFromServer,
 889                 calendar_RenderView_or_Tail,
 890                 calendar_Cleanup);
 891
 892         RegisterReadLoopHandlerset(
 893                 VIEW_CALBRIEF,
 894                 calendar_GetParamsGetServerCall,
 895                 NULL,
 896                 calendar_LoadMsgFromServer,
 897                 calendar_RenderView_or_Tail,
 898                 calendar_Cleanup);
 899
 900
 901
 902         RegisterPreference("daystart", _("Calendar day view begins at:"), PRF_INT, NULL);
 903         RegisterPreference("dayend", _("Calendar day view ends at:"), PRF_INT, NULL);
 904         RegisterPreference("weekstart", _("Week starts on:"), PRF_INT, NULL);
 905
 906         WebcitAddUrlHandler(HKEY("freebusy"), do_freebusy, COOKIEUNNEEDED|ANONYMOUS|FORCE_SESSIONCLOSE);
 907         WebcitAddUrlHandler(HKEY("display_edit_task"), display_edit_task, 0);
 908         WebcitAddUrlHandler(HKEY("display_edit_event"), display_edit_event, 0);
 909         WebcitAddUrlHandler(HKEY("save_event"), save_event, 0);
 910         WebcitAddUrlHandler(HKEY("respond_to_request"), respond_to_request, 0);
 911         WebcitAddUrlHandler(HKEY("handle_rsvp"), handle_rsvp, 0);
 912 }