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
  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                 the_method = icalproperty_get_method(method);
  60                 char *title;
  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, tt, 0);
 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, tt, 0);
 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 the component has attendees, iterate through them. */
 157         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY);
 158              (p != NULL);
 159              p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 160                 StrBufAppendPrintf(Target, "<dt>");
 161                 StrBufAppendPrintf(Target, _("Attendee:"));
 162                 StrBufAppendPrintf(Target, "</dt><dd>");
 163                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
 164                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 165
 166                         /** screen name or email address */
 167                         strcpy(buf, &buf[7]);
 168                         striplt(buf);
 169                         StrEscAppend(Target, NULL, buf, 0, 0);
 170                         StrBufAppendPrintf(Target, " ");
 171
 172                         /** participant status */
 173                         partstat_as_string(buf, p);
 174                         StrEscAppend(Target, NULL, buf, 0, 0);
 175                 }
 176                 StrBufAppendPrintf(Target, "</dd>\n");
 177         }
 178
 179         /* If the component has subcomponents, recurse through them. */
 180         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 181              (c != 0);
 182              c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 183                 /* Recursively process subcomponent */
 184                 cal_process_object(Target, c, recursion_level+1, msgnum, cal_partnum);
 185         }
 186
 187         /* If this is a REQUEST, display conflicts and buttons */
 188         if (the_method == ICAL_METHOD_REQUEST) {
 189
 190                 /* Check for conflicts */
 191                 lprintf(9, "Checking server calendar for conflicts...\n");
 192                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 193                 serv_getln(buf, sizeof buf);
 194                 if (buf[0] == '1') {
 195                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 196                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 197                                 is_update = extract_int(buf, 4);
 198
 199                                 if (is_update) {
 200                                         snprintf(conflict_message, sizeof conflict_message,
 201                                                  _("This is an update of '%s' which is already in your calendar."), conflict_name);
 202                                 }
 203                                 else {
 204                                         snprintf(conflict_message, sizeof conflict_message,
 205                                                  _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
 206                                 }
 207
 208                                 StrBufAppendPrintf(Target, "<dt>%s",
 209                                         (is_update ?
 210                                          _("Update:") :
 211                                          _("CONFLICT:")
 212                                                 )
 213                                         );
 214                                 StrBufAppendPrintf(Target, "</dt><dd>");
 215                                 StrEscAppend(Target, NULL, conflict_message, 0, 0);
 216                                 StrBufAppendPrintf(Target, "</dd>\n");
 217                         }
 218                 }
 219                 lprintf(9, "...done.\n");
 220
 221                 StrBufAppendPrintf(Target, "</dl>");
 222
 223                 /* Display the Accept/Decline buttons */
 224                 StrBufAppendPrintf(Target, "<p id=\"%s_question\">"
 225                         "%s "
 226                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 227                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Accept');\">%s</a>"
 228                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 229                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Tentative');\">%s</a>"
 230                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 231                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Decline');\">%s</a>"
 232                         "</span></p>\n",
 233                         divname,
 234                         _("How would you like to respond to this invitation?"),
 235                         divname, divname, msgnum, cal_partnum, _("Accept"),
 236                         divname, divname, msgnum, cal_partnum, _("Tentative"),
 237                         divname, divname, msgnum, cal_partnum, _("Decline")
 238                         );
 239
 240         }
 241
 242         /* If this is a REPLY, display update button */
 243         if (the_method == ICAL_METHOD_REPLY) {
 244
 245                 /* In the future, if we want to validate this object before
 246                  * continuing, we can do it this way:
 247                  serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 248                  serv_getln(buf, sizeof buf);
 249                  }
 250                 ***********/
 251
 252                 /* Display the update buttons */
 253                 StrBufAppendPrintf(Target, "<p id=\"%s_question\" >"
 254                         "%s "
 255                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 256                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Update');\">%s</a>"
 257                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 258                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Ignore');\">%s</a>"
 259                         "</span></p>\n",
 260                         divname,
 261                         _("Click <i>Update</i> to accept this reply and update your calendar."),
 262                         divname, divname, msgnum, cal_partnum, _("Update"),
 263                         divname, divname, msgnum, cal_partnum, _("Ignore")
 264                         );
 265
 266         }
 267
 268         /* Trailing HTML for the display of this object */
 269         if (recursion_level == 0) {
 270                 StrBufAppendPrintf(Target, "<p>&nbsp;</p></div>\n");
 271         }
 272 }
 273
 274
 275 /*
 276  * Deserialize a calendar object in a message so it can be displayed.
 277  *
 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  * \brief accept/decline meeting
 302  * Respond to a meeting request
 303  */
 304 void respond_to_request(void)
 305 {
 306         char buf[1024];
 307
 308         begin_ajax_response();
 309
 310         serv_printf("ICAL respond|%s|%s|%s|",
 311                 bstr("msgnum"),
 312                 bstr("cal_partnum"),
 313                 bstr("sc")
 314         );
 315         serv_getln(buf, sizeof buf);
 316
 317         if (buf[0] == '2') {
 318                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 319                 if (!strcasecmp(bstr("sc"), "accept")) {
 320                         wprintf(_("You have accepted this meeting invitation.  "
 321                                 "It has been entered into your calendar.")
 322                         );
 323                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 324                         wprintf(_("You have tentatively accepted this meeting invitation.  "
 325                                 "It has been 'pencilled in' to your calendar.")
 326                         );
 327                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 328                         wprintf(_("You have declined this meeting invitation.  "
 329                                   "It has <b>not</b> been entered into your calendar.")
 330                                 );
 331                 }
 332                 wprintf(" ");
 333                 wprintf(_("A reply has been sent to the meeting organizer."));
 334                 wprintf("</span>");
 335         } else {
 336                 wprintf("<img align=\"center\" src=\"static/error.gif\"><span>");
 337                 wprintf("%s\n", &buf[4]);
 338                 wprintf("</span>");
 339         }
 340
 341         end_ajax_response();
 342 }
 343
 344
 345
 346 /**
 347  * \brief Handle an incoming RSVP
 348  */
 349 void handle_rsvp(void)
 350 {
 351         char buf[1024];
 352
 353         begin_ajax_response();
 354
 355         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 356                 bstr("msgnum"),
 357                 bstr("cal_partnum"),
 358                 bstr("sc")
 359         );
 360         serv_getln(buf, sizeof buf);
 361
 362         if (buf[0] == '2') {
 363                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 364                 if (!strcasecmp(bstr("sc"), "update")) {
 365                         wprintf(_("Your calendar has been updated to reflect this RSVP."));
 366                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 367                         wprintf(_("You have chosen to ignore this RSVP. "
 368                                   "Your calendar has <b>not</b> been updated.")
 369                                 );
 370                 }
 371                 wprintf("</span>");
 372         } else {
 373                 wprintf("<img src=\"static/error.gif\"><span> %s\n", &buf[4]);
 374                 wprintf("</span>");
 375         }
 376
 377         end_ajax_response();
 378 }
 379
 380
 381
 382
 383 /*
 384  * free memory allocated using libical
 385  */
 386 void delete_cal(void *vCal)
 387 {
 388         disp_cal *Cal = (disp_cal*) vCal;
 389         icalcomponent_free(Cal->cal);
 390         free(Cal->from);
 391         free(Cal);
 392 }
 393
 394 /*
 395  * This is the meat-and-bones of the first part of our two-phase calendar display.
 396  * As we encounter calendar items in messages being read from the server, we break out
 397  * any iCalendar objects and store them in a hash table.  Later on, the second phase will
 398  * use this hash table to render the calendar for display.
 399  */
 400 void display_individual_cal(icalcomponent *cal, long msgnum, char *from, int unread, struct calview *calv)
 401 {
 402         icalproperty *ps = NULL;
 403         struct icaltimetype dtstart, dtend;
 404         struct icaldurationtype dur;
 405         wcsession *WCC = WC;
 406         disp_cal *Cal;
 407         size_t len;
 408         time_t final_recurrence = 0;
 409         icalcomponent *cptr = NULL;
 410
 411         /* recur variables */
 412         icalproperty *rrule = NULL;
 413         struct icalrecurrencetype recur;
 414         icalrecur_iterator *ritr = NULL;
 415         struct icaltimetype next;
 416         int num_recur = 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         int stop_rr = 0;
 502         while (next = icalrecur_iterator_next(ritr), ((!icaltime_is_null_time(next))&&(!stop_rr)) ) {
 503                 ++num_recur;
 504                 if (num_recur > 1) {            /* Skip the first one.  We already did it at the root. */
 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                         icalcomponent *cptr;
 518                         if (icalcomponent_isa(Cal->cal) == ICAL_VEVENT_COMPONENT) {
 519                                 cptr = Cal->cal;
 520                         }
 521                         else {
 522                                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 523                         }
 524                         if (cptr) {
 525                                 ps = icalcomponent_get_first_property(cptr, ICAL_DTSTART_PROPERTY);
 526                                 if (ps != NULL) {
 527                                         icalcomponent_remove_property(cptr, ps);
 528                                         ps = icalproperty_new_dtstart(next);
 529                                         icalcomponent_add_property(cptr, ps);
 530
 531                                         Cal->event_start = icaltime_as_timet(next);
 532                                         final_recurrence = Cal->event_start;
 533                                 }
 534
 535                                 ps = icalcomponent_get_first_property(cptr, ICAL_DTEND_PROPERTY);
 536                                 if (ps != NULL) {
 537                                         icalcomponent_remove_property(cptr, ps);
 538
 539                                         /* Make a new dtend */
 540                                         ps = icalproperty_new_dtend(icaltime_add(next, dur));
 541
 542                                         /* and stick it somewhere */
 543                                         icalcomponent_add_property(cptr, ps);
 544                                 }
 545
 546                         }
 547
 548                         /* Dezonify and decapsulate at the very last moment */
 549                         ical_dezonify(Cal->cal);
 550                         if (icalcomponent_isa(Cal->cal) != ICAL_VEVENT_COMPONENT) {
 551                                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 552                                 if (cptr) {
 553                                         cptr = icalcomponent_new_clone(cptr);
 554                                         icalcomponent_free(Cal->cal);
 555                                         Cal->cal = cptr;
 556                                 }
 557                         }
 558
 559                         if ( (Cal->event_start > calv->lower_bound)
 560                            && (Cal->event_start < calv->upper_bound) ) {
 561                                 Put(WCC->disp_cal_items,
 562                                         (char*) &Cal->event_start,
 563                                         sizeof(Cal->event_start),
 564                                         Cal,
 565                                         delete_cal
 566                                 );
 567                         }
 568                         else {
 569                                 delete_cal(Cal);
 570                         }
 571
 572                         /* If an upper bound is set, stop when we go out of scope */
 573                         if (final_recurrence > calv->upper_bound) stop_rr = 1;
 574                 }
 575         }
 576         icalrecur_iterator_free(ritr);
 577         /* lprintf(9, "Performed %d recurrences; final one is %s", num_recur, ctime(&final_recurrence)); */
 578
 579 }
 580
 581
 582
 583 /*
 584  * Display a task by itself (for editing)
 585  */
 586 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum, char *from,
 587                         int unread, struct calview *calv)
 588 {
 589         icalcomponent *vtodo;
 590         icalproperty *p;
 591         struct icaltimetype IcalTime;
 592         time_t now;
 593         int created_new_vtodo = 0;
 594         icalproperty_status todoStatus;
 595
 596         now = time(NULL);
 597
 598         if (supplied_vtodo != NULL) {
 599                 vtodo = supplied_vtodo;
 600
 601                 /**
 602                  * If we're looking at a fully encapsulated VCALENDAR
 603                  * rather than a VTODO component, attempt to use the first
 604                  * relevant VTODO subcomponent.  If there is none, the
 605                  * NULL returned by icalcomponent_get_first_component() will
 606                  * tell the next iteration of this function to create a
 607                  * new one.
 608                  */
 609                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 610                         display_edit_individual_task(
 611                                 icalcomponent_get_first_component(
 612                                         vtodo, ICAL_VTODO_COMPONENT
 613                                         ),
 614                                 msgnum, from, unread, calv
 615                                 );
 616                         return;
 617                 }
 618         }
 619         else {
 620                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 621                 created_new_vtodo = 1;
 622         }
 623
 624         // TODO: Can we take all this and move it into a template?
 625         output_headers(1, 1, 1, 0, 0, 0);
 626         wprintf("<!-- start task edit form -->");
 627         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 628         // Get summary early for title
 629         wprintf("<div class=\"box\">\n");
 630         wprintf("<div class=\"boxlabel\">");
 631         wprintf(_("Edit task"));
 632         wprintf("- ");
 633         if (p != NULL) {
 634                 escputs((char *)icalproperty_get_comment(p));
 635         }
 636         wprintf("</div>");
 637
 638         wprintf("<div class=\"boxcontent\">\n");
 639         wprintf("<FORM METHOD=\"POST\" action=\"save_task\">\n");
 640         wprintf("<div style=\"display: none;\">\n       ");
 641         wprintf("<input type=\"hidden\" name=\"nonce\" value=\"%d\">\n", WC->nonce);
 642         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 643                 msgnum);
 644         wprintf("</div>");
 645         wprintf("<table class=\"calendar_background\"><tr><td>");
 646         wprintf("<TABLE STYLE=\"border: none;\">\n");
 647
 648         wprintf("<TR><TD>");
 649         wprintf(_("Summary:"));
 650         wprintf("</TD><TD>"
 651                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 652                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 653         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 654         if (p != NULL) {
 655                 escputs((char *)icalproperty_get_comment(p));
 656         }
 657         wprintf("\"></TD></TR>\n");
 658
 659         wprintf("<TR><TD>");
 660         wprintf(_("Start date:"));
 661         wprintf("</TD><TD>");
 662         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 663         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"nodtstart\" ID=\"nodtstart\" VALUE=\"NODTSTART\" ");
 664         if (p == NULL) {
 665                 wprintf("CHECKED=\"CHECKED\"");
 666         }
 667         wprintf(">");
 668         wprintf(_("No date"));
 669
 670         wprintf(" ");
 671         wprintf(_("or"));
 672         wprintf(" ");
 673         if (p != NULL) {
 674                 IcalTime = icalproperty_get_dtstart(p);
 675         }
 676         else
 677                 IcalTime = icaltime_current_time_with_zone(get_default_icaltimezone());
 678         display_icaltimetype_as_webform(&IcalTime, "dtstart", 0);
 679         wprintf("</TD></TR>\n");
 680
 681         wprintf("<TR><TD>");
 682         wprintf(_("Due date:"));
 683         wprintf("</TD><TD>");
 684         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 685         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"nodue\" ID=\"nodue\" VALUE=\"NODUE\"");
 686         if (p == NULL) {
 687                 wprintf("CHECKED=\"CHECKED\"");
 688         }
 689         wprintf(">");
 690         wprintf(_("No date"));
 691         wprintf(" ");
 692         wprintf(_("or"));
 693         wprintf(" ");
 694         if (p != NULL) {
 695                 IcalTime = icalproperty_get_due(p);
 696         }
 697         else
 698                 IcalTime = icaltime_current_time_with_zone(get_default_icaltimezone());
 699         display_icaltimetype_as_webform(&IcalTime, "due", 0);
 700
 701         wprintf("</TD></TR>\n");
 702         todoStatus = icalcomponent_get_status(vtodo);
 703         wprintf("<TR><TD>\n");
 704         wprintf(_("Completed:"));
 705         wprintf("</TD><TD>");
 706         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"status\" VALUE=\"COMPLETED\"");
 707         if (todoStatus == ICAL_STATUS_COMPLETED) {
 708                 wprintf(" CHECKED=\"CHECKED\"");
 709         }
 710         wprintf(" >");
 711         wprintf("</TD></TR>");
 712         // start category field
 713         p = icalcomponent_get_first_property(vtodo, ICAL_CATEGORIES_PROPERTY);
 714         wprintf("<TR><TD>");
 715         wprintf(_("Category:"));
 716         wprintf("</TD><TD>");
 717         wprintf("<INPUT TYPE=\"text\" NAME=\"category\" MAXLENGTH=\"32\" SIZE=\"32\" VALUE=\"");
 718         if (p != NULL) {
 719                 escputs((char *)icalproperty_get_categories(p));
 720         }
 721         wprintf("\">");
 722         wprintf("</TD></TR>\n   ");
 723         // end category field
 724         wprintf("<TR><TD>");
 725         wprintf(_("Description:"));
 726         wprintf("</TD><TD>");
 727         wprintf("<TEXTAREA NAME=\"description\" "
 728                 "ROWS=\"10\" COLS=\"80\">\n"
 729                 );
 730         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 731         if (p != NULL) {
 732                 escputs((char *)icalproperty_get_comment(p));
 733         }
 734         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 735
 736         wprintf("<SPAN STYLE=\"text-align: center;\">"
 737                 "<INPUT TYPE=\"submit\" NAME=\"save_button\" VALUE=\"%s\">"
 738                 "&nbsp;&nbsp;"
 739                 "<INPUT TYPE=\"submit\" NAME=\"delete_button\" VALUE=\"%s\">\n"
 740                 "&nbsp;&nbsp;"
 741                 "<INPUT TYPE=\"submit\" NAME=\"cancel_button\" VALUE=\"%s\">\n"
 742                 "</SPAN>\n",
 743                 _("Save"),
 744                 _("Delete"),
 745                 _("Cancel")
 746                 );
 747         wprintf("</td></tr></table>");
 748         wprintf("</FORM>\n");
 749         wprintf("</div></div></div>\n");
 750         wprintf("<!-- end task edit form -->");
 751         wDumpContent(1);
 752
 753         if (created_new_vtodo) {
 754                 icalcomponent_free(vtodo);
 755         }
 756 }
 757
 758 /*
 759  * \brief Save an edited task
 760  * \param supplied_vtodo the task to save
 761  * \param msgnum number of the mesage in our db
 762  */
 763 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum, char* from, int unread,
 764                                 struct calview *calv)
 765 {
 766         char buf[SIZ];
 767         int delete_existing = 0;
 768         icalproperty *prop;
 769         icalcomponent *vtodo, *encaps;
 770         int created_new_vtodo = 0;
 771         int i;
 772         int sequence = 0;
 773         struct icaltimetype t;
 774
 775         if (supplied_vtodo != NULL) {
 776                 vtodo = supplied_vtodo;
 777                 /**
 778                  * If we're looking at a fully encapsulated VCALENDAR
 779                  * rather than a VTODO component, attempt to use the first
 780                  * relevant VTODO subcomponent.  If there is none, the
 781                  * NULL returned by icalcomponent_get_first_component() will
 782                  * tell the next iteration of this function to create a
 783                  * new one.
 784                  */
 785                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 786                         save_individual_task(
 787                                 icalcomponent_get_first_component(
 788                                         vtodo, ICAL_VTODO_COMPONENT),
 789                                 msgnum, from, unread, calv
 790                                 );
 791                         return;
 792                 }
 793         }
 794         else {
 795                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 796                 created_new_vtodo = 1;
 797         }
 798
 799         if (havebstr("save_button")) {
 800
 801                 /** Replace values in the component with ones from the form */
 802
 803                 while (prop = icalcomponent_get_first_property(vtodo,
 804                                                                ICAL_SUMMARY_PROPERTY), prop != NULL) {
 805                         icalcomponent_remove_property(vtodo, prop);
 806                         icalproperty_free(prop);
 807                 }
 808                 if (havebstr("summary")) {
 809
 810                         icalcomponent_add_property(vtodo,
 811                                                    icalproperty_new_summary(bstr("summary")));
 812                 } else {
 813                         icalcomponent_add_property(vtodo,
 814                                                    icalproperty_new_summary("Untitled Task"));
 815                 }
 816
 817                 while (prop = icalcomponent_get_first_property(vtodo,
 818                                                                ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 819                         icalcomponent_remove_property(vtodo, prop);
 820                         icalproperty_free(prop);
 821                 }
 822                 if (havebstr("description")) {
 823                         icalcomponent_add_property(vtodo,
 824                                                    icalproperty_new_description(bstr("description")));
 825                 }
 826
 827                 while (prop = icalcomponent_get_first_property(vtodo,
 828                                                                ICAL_DTSTART_PROPERTY), prop != NULL) {
 829                         icalcomponent_remove_property(vtodo, prop);
 830                         icalproperty_free(prop);
 831                 }
 832                 if (IsEmptyStr(bstr("nodtstart"))) {
 833                         icaltime_from_webform(&t, "dtstart");
 834                         icalcomponent_add_property(vtodo,
 835                                                    icalproperty_new_dtstart(t)
 836                                 );
 837                 }
 838                 while(prop = icalcomponent_get_first_property(vtodo,
 839                                                               ICAL_STATUS_PROPERTY), prop != NULL) {
 840                         icalcomponent_remove_property(vtodo,prop);
 841                         icalproperty_free(prop);
 842                 }
 843                 if (havebstr("status")) {
 844                         icalproperty_status taskStatus = icalproperty_string_to_status(
 845                                 bstr("status"));
 846                         icalcomponent_set_status(vtodo, taskStatus);
 847                 }
 848                 while (prop = icalcomponent_get_first_property(vtodo,
 849                                                                ICAL_CATEGORIES_PROPERTY), prop != NULL) {
 850                         icalcomponent_remove_property(vtodo,prop);
 851                         icalproperty_free(prop);
 852                 }
 853                 if (!IsEmptyStr(bstr("category"))) {
 854                         prop = icalproperty_new_categories(bstr("category"));
 855                         icalcomponent_add_property(vtodo,prop);
 856                 }
 857                 while (prop = icalcomponent_get_first_property(vtodo,
 858                                                                ICAL_DUE_PROPERTY), prop != NULL) {
 859                         icalcomponent_remove_property(vtodo, prop);
 860                         icalproperty_free(prop);
 861                 }
 862                 if (IsEmptyStr(bstr("nodue"))) {
 863                         icaltime_from_webform(&t, "due");
 864                         icalcomponent_add_property(vtodo,
 865                                                    icalproperty_new_due(t)
 866                                 );
 867                 }
 868                 /** Give this task a UID if it doesn't have one. */
 869                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 870                 if (icalcomponent_get_first_property(vtodo,
 871                                                      ICAL_UID_PROPERTY) == NULL) {
 872                         generate_uuid(buf);
 873                         icalcomponent_add_property(vtodo,
 874                                                    icalproperty_new_uid(buf)
 875                                 );
 876                 }
 877
 878                 /** Increment the sequence ID */
 879                 lprintf(9, "Increment the sequence ID\n");
 880                 while (prop = icalcomponent_get_first_property(vtodo,
 881                                                                ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 882                         i = icalproperty_get_sequence(prop);
 883                         lprintf(9, "Sequence was %d\n", i);
 884                         if (i > sequence) sequence = i;
 885                         icalcomponent_remove_property(vtodo, prop);
 886                         icalproperty_free(prop);
 887                 }
 888                 ++sequence;
 889                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 890                 icalcomponent_add_property(vtodo,
 891                                            icalproperty_new_sequence(sequence)
 892                         );
 893
 894                 /**
 895                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 896                  * for two reasons: one, it's easier to just free the whole thing
 897                  * when we're done instead of unbundling, but more importantly, we
 898                  * can't encapsulate something that may already be encapsulated
 899                  * somewhere else.
 900                  */
 901                 lprintf(9, "Encapsulating into a full VCALENDAR component\n");
 902                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 903
 904                 /* Serialize it and save it to the message base */
 905                 serv_puts("ENT0 1|||4");
 906                 serv_getln(buf, sizeof buf);
 907                 if (buf[0] == '4') {
 908                         serv_puts("Content-type: text/calendar");
 909                         serv_puts("");
 910                         serv_puts(icalcomponent_as_ical_string(encaps));
 911                         serv_puts("000");
 912
 913                         /**
 914                          * Probably not necessary; the server will see the UID
 915                          * of the object and delete the old one anyway, but
 916                          * just in case...
 917                          */
 918                         delete_existing = 1;
 919                 }
 920                 icalcomponent_free(encaps);
 921         }
 922
 923         /**
 924          * If the user clicked 'Delete' then explicitly delete the message.
 925          */
 926         if (havebstr("delete_button")) {
 927                 delete_existing = 1;
 928         }
 929
 930         if ( (delete_existing) && (msgnum > 0L) ) {
 931                 serv_printf("DELE %ld", lbstr("msgnum"));
 932                 serv_getln(buf, sizeof buf);
 933         }
 934
 935         if (created_new_vtodo) {
 936                 icalcomponent_free(vtodo);
 937         }
 938
 939         /** Go back to the task list */
 940         readloop(readfwd);
 941 }
 942
 943
 944
 945 /*
 946  * Code common to all icalendar display handlers.  Given a message number and a MIME
 947  * type, we load the message and hunt for that MIME type.  If found, we load
 948  * the relevant part, deserialize it into a libical component, filter it for
 949  * the requested object type, and feed it to the specified handler.
 950  */
 951 void load_ical_object(long msgnum, int unread,
 952                            icalcomponent_kind which_kind,
 953                            void (*callback)(icalcomponent *, long, char*, int, struct calview *),
 954                            struct calview *calv
 955         )
 956 {
 957         char buf[1024];
 958         char from[128] = "";
 959         char mime_partnum[256];
 960         char mime_filename[256];
 961         char mime_content_type[256];
 962         char mime_disposition[256];
 963         int mime_length;
 964         char relevant_partnum[256];
 965         char *relevant_source = NULL;
 966         icalcomponent *cal, *c;
 967
 968         relevant_partnum[0] = '\0';
 969         sprintf(buf, "MSG4 %ld", msgnum);       /* we need the mime headers */
 970         serv_puts(buf);
 971         serv_getln(buf, sizeof buf);
 972         if (buf[0] != '1') return;
 973
 974         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 975                 if (!strncasecmp(buf, "part=", 5)) {
 976                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 977                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 978                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 979                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 980                         mime_length = extract_int(&buf[5], 5);
 981
 982                         if (  (!strcasecmp(mime_content_type, "text/calendar"))
 983                               || (!strcasecmp(mime_content_type, "application/ics"))
 984                               || (!strcasecmp(mime_content_type, "text/vtodo"))
 985                                 ) {
 986                                 strcpy(relevant_partnum, mime_partnum);
 987                         }
 988                 }
 989                 else if (!strncasecmp(buf, "from=", 4)) {
 990                         extract_token(from, buf, 1, '=', sizeof(from));
 991                 }
 992         }
 993
 994         if (!IsEmptyStr(relevant_partnum)) {
 995                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 996                 if (relevant_source != NULL) {
 997
 998                         cal = icalcomponent_new_from_string(relevant_source);
 999                         if (cal != NULL) {
1000
1001                                 /* A which_kind of (-1) means just load the whole thing */
1002                                 if (which_kind == (-1)) {
1003                                         callback(cal, msgnum, from, unread, calv);
1004                                 }
1005
1006                                 /* Otherwise recurse and hunt */
1007                                 else {
1008
1009                                         /* Simple components of desired type */
1010                                         if (icalcomponent_isa(cal) == which_kind) {
1011                                                 callback(cal, msgnum, from, unread, calv);
1012                                         }
1013
1014                                         /* Subcomponents of desired type */
1015                                         for (c = icalcomponent_get_first_component(cal, which_kind);
1016                                         (c != 0);
1017                                         c = icalcomponent_get_next_component(cal, which_kind)) {
1018                                                 callback(c, msgnum, from, unread, calv);
1019                                         }
1020
1021                                 }
1022
1023                                 icalcomponent_free(cal);
1024                         }
1025                         free(relevant_source);
1026                 }
1027         }
1028         icalmemory_free_ring();
1029 }
1030
1031 /*
1032  * Display a calendar item
1033  */
1034 void load_calendar_item(message_summary *Msg, int unread, struct calview *c) {
1035         /*load_ical_object(Msg->msgnum, unread, ICAL_VEVENT_COMPONENT, display_individual_cal, c);*/
1036         load_ical_object(Msg->msgnum, unread, (-1), display_individual_cal, c);
1037 }
1038
1039 /*
1040  * Display task view
1041  */
1042 void display_task(message_summary *Msg, int unread) {
1043         load_ical_object(Msg->msgnum, unread, ICAL_VTODO_COMPONENT, display_individual_cal, NULL);
1044 }
1045
1046 /*
1047  * Display the editor component for a task
1048  */
1049 void display_edit_task(void) {
1050         long msgnum = 0L;
1051
1052         /* Force change the room if we have to */
1053         if (havebstr("taskrm")) {
1054                 gotoroom((char *)bstr("taskrm"));
1055         }
1056
1057         msgnum = lbstr("msgnum");
1058         if (msgnum > 0L) {
1059                 /* existing task */
1060                 load_ical_object(msgnum, 0,
1061                                       ICAL_VTODO_COMPONENT,
1062                                       display_edit_individual_task,
1063                                       NULL
1064                 );
1065         }
1066         else {
1067                 /* new task */
1068                 display_edit_individual_task(NULL, 0L, "", 0, NULL);
1069         }
1070 }
1071
1072 /*
1073  * save an edited task
1074  */
1075 void save_task(void) {
1076         long msgnum = 0L;
1077         msgnum = lbstr("msgnum");
1078         if (msgnum > 0L) {
1079                 load_ical_object(msgnum, 0, ICAL_VTODO_COMPONENT, save_individual_task, NULL);
1080         }
1081         else {
1082                 save_individual_task(NULL, 0L, "", 0, NULL);
1083         }
1084 }
1085
1086 /*
1087  * display the editor component for an event
1088  */
1089 void display_edit_event(void) {
1090         long msgnum = 0L;
1091
1092         msgnum = lbstr("msgnum");
1093         if (msgnum > 0L) {
1094                 /* existing event */
1095                 load_ical_object(msgnum, 0, ICAL_VEVENT_COMPONENT, display_edit_individual_event, NULL);
1096         }
1097         else {
1098                 /* new event */
1099                 display_edit_individual_event(NULL, 0L, "", 0, NULL);
1100         }
1101 }
1102
1103 /*
1104  * save an edited event
1105  */
1106 void save_event(void) {
1107         long msgnum = 0L;
1108
1109         msgnum = lbstr("msgnum");
1110
1111         if (msgnum > 0L) {
1112                 /* load_ical_object(msgnum, 0, ICAL_VEVENT_COMPONENT, save_individual_event, NULL); */
1113                 load_ical_object(msgnum, 0, (-1), save_individual_event, NULL);
1114         }
1115         else {
1116                 save_individual_event(NULL, 0L, "", 0, NULL);
1117         }
1118 }
1119
1120
1121
1122
1123
1124 /*
1125  * Anonymous request of freebusy data for a user
1126  */
1127 void do_freebusy(const char *req) {
1128         char who[SIZ];
1129         char buf[SIZ];
1130         int len;
1131         long lines;
1132
1133         extract_token(who, req, 1, ' ', sizeof who);
1134         if (!strncasecmp(who, "/freebusy/", 10)) {
1135                 strcpy(who, &who[10]);
1136         }
1137         unescape_input(who);
1138
1139         len = strlen(who);
1140         if ( (!strcasecmp(&who[len-4], ".vcf"))
1141              || (!strcasecmp(&who[len-4], ".ifb"))
1142              || (!strcasecmp(&who[len-4], ".vfb")) ) {
1143                 who[len-4] = 0;
1144         }
1145
1146         lprintf(9, "freebusy requested for <%s>\n", who);
1147         serv_printf("ICAL freebusy|%s", who);
1148         serv_getln(buf, sizeof buf);
1149
1150         if (buf[0] != '1') {
1151                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
1152                 output_headers(0, 0, 0, 0, 0, 0);
1153                 hprintf("Content-Type: text/plain\r\n");
1154                 wprintf("%s\n", &buf[4]);
1155                 end_burst();
1156                 return;
1157         }
1158
1159         read_server_text(WC->WBuf, &lines);
1160         http_transmit_thing("text/calendar", 0);
1161 }
1162
1163
1164
1165
1166
1167 void
1168 InitModule_CALENDAR
1169 (void)
1170 {
1171         WebcitAddUrlHandler(HKEY("display_edit_task"), display_edit_task, 0);
1172         WebcitAddUrlHandler(HKEY("save_task"), save_task, 0);
1173         WebcitAddUrlHandler(HKEY("display_edit_event"), display_edit_event, 0);
1174         WebcitAddUrlHandler(HKEY("save_event"), save_event, 0);
1175         WebcitAddUrlHandler(HKEY("respond_to_request"), respond_to_request, 0);
1176         WebcitAddUrlHandler(HKEY("handle_rsvp"), handle_rsvp, 0);
1177 }