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         /* Leading HTML for the display of this object */
  41         if (recursion_level == 0) {
  42                 StrBufAppendPrintf(Target, "<div class=\"mimepart\">\n");
  43         }
  44
  45         /* Look for a method */
  46         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  47
  48         /* See what we need to do with this */
  49         if (method != NULL) {
  50                 the_method = icalproperty_get_method(method);
  51                 char *title;
  52
  53                 StrBufAppendPrintf(Target, "<div id=\"%s_title\">", divname);
  54                 StrBufAppendPrintf(Target, "<img src=\"static/calarea_48x.gif\">");
  55                 StrBufAppendPrintf(Target, "<span>");
  56                 switch(the_method) {
  57                 case ICAL_METHOD_REQUEST:
  58                         title = _("Meeting invitation");
  59                         break;
  60                 case ICAL_METHOD_REPLY:
  61                         title = _("Attendee's reply to your invitation");
  62                         break;
  63                 case ICAL_METHOD_PUBLISH:
  64                         title = _("Published event");
  65                         break;
  66                 default:
  67                         title = _("This is an unknown type of calendar item.");
  68                         break;
  69                 }
  70                 StrBufAppendPrintf(Target, "</span>");
  71
  72                 StrBufAppendPrintf(Target, "&nbsp;&nbsp;%s",title);
  73                 StrBufAppendPrintf(Target, "</div>");
  74         }
  75
  76         StrBufAppendPrintf(Target, "<dl>");
  77         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
  78         if (p != NULL) {
  79                 StrBufAppendPrintf(Target, "<dt>");
  80                 StrBufAppendPrintf(Target, _("Summary:"));
  81                 StrBufAppendPrintf(Target, "</dt><dd>");
  82                 StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
  83                 StrBufAppendPrintf(Target, "</dd>\n");
  84         }
  85
  86         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
  87         if (p != NULL) {
  88                 StrBufAppendPrintf(Target, "<dt>");
  89                 StrBufAppendPrintf(Target, _("Location:"));
  90                 StrBufAppendPrintf(Target, "</dt><dd>");
  91                 StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
  92                 StrBufAppendPrintf(Target, "</dd>\n");
  93         }
  94
  95         /*
  96          * Only show start/end times if we're actually looking at the VEVENT
  97          * component.  Otherwise it shows bogus dates for things like timezone.
  98          */
  99         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 100
 101                 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
 102                 if (p != NULL) {
 103                         t = icalproperty_get_dtstart(p);
 104
 105                         if (t.is_date) {
 106                                 struct tm d_tm;
 107                                 char d_str[32];
 108                                 memset(&d_tm, 0, sizeof d_tm);
 109                                 d_tm.tm_year = t.year - 1900;
 110                                 d_tm.tm_mon = t.month - 1;
 111                                 d_tm.tm_mday = t.day;
 112                                 wc_strftime(d_str, sizeof d_str, "%x", &d_tm);
 113                                 StrBufAppendPrintf(Target, "<dt>");
 114                                 StrBufAppendPrintf(Target, _("Date:"));
 115                                 StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", d_str);
 116                         }
 117                         else {
 118                                 tt = icaltime_as_timet(t);
 119                                 webcit_fmt_date(buf, tt, 0);
 120                                 StrBufAppendPrintf(Target, "<dt>");
 121                                 StrBufAppendPrintf(Target, _("Starting date/time:"));
 122                                 StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", buf);
 123                         }
 124                 }
 125
 126                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 127                 if (p != NULL) {
 128                         t = icalproperty_get_dtend(p);
 129                         tt = icaltime_as_timet(t);
 130                         webcit_fmt_date(buf, tt, 0);
 131                         StrBufAppendPrintf(Target, "<dt>");
 132                         StrBufAppendPrintf(Target, _("Ending date/time:"));
 133                         StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", buf);
 134                 }
 135
 136         }
 137
 138         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 139         if (p != NULL) {
 140                 StrBufAppendPrintf(Target, "<dt>");
 141                 StrBufAppendPrintf(Target, _("Description:"));
 142                 StrBufAppendPrintf(Target, "</dt><dd>");
 143                 StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
 144                 StrBufAppendPrintf(Target, "</dd>\n");
 145         }
 146
 147         /* If the component has attendees, iterate through them. */
 148         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY);
 149              (p != NULL);
 150              p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 151                 StrBufAppendPrintf(Target, "<dt>");
 152                 StrBufAppendPrintf(Target, _("Attendee:"));
 153                 StrBufAppendPrintf(Target, "</dt><dd>");
 154                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
 155                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 156
 157                         /** screen name or email address */
 158                         strcpy(buf, &buf[7]);
 159                         striplt(buf);
 160                         StrEscAppend(Target, NULL, buf, 0, 0);
 161                         StrBufAppendPrintf(Target, " ");
 162
 163                         /** participant status */
 164                         partstat_as_string(buf, p);
 165                         StrEscAppend(Target, NULL, buf, 0, 0);
 166                 }
 167                 StrBufAppendPrintf(Target, "</dd>\n");
 168         }
 169
 170         /* If the component has subcomponents, recurse through them. */
 171         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 172              (c != 0);
 173              c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 174                 /* Recursively process subcomponent */
 175                 cal_process_object(Target, c, recursion_level+1, msgnum, cal_partnum);
 176         }
 177
 178         /* If this is a REQUEST, display conflicts and buttons */
 179         if (the_method == ICAL_METHOD_REQUEST) {
 180
 181                 /* Check for conflicts */
 182                 lprintf(9, "Checking server calendar for conflicts...\n");
 183                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 184                 serv_getln(buf, sizeof buf);
 185                 if (buf[0] == '1') {
 186                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 187                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 188                                 is_update = extract_int(buf, 4);
 189
 190                                 if (is_update) {
 191                                         snprintf(conflict_message, sizeof conflict_message,
 192                                                  _("This is an update of '%s' which is already in your calendar."), conflict_name);
 193                                 }
 194                                 else {
 195                                         snprintf(conflict_message, sizeof conflict_message,
 196                                                  _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
 197                                 }
 198
 199                                 StrBufAppendPrintf(Target, "<dt>%s",
 200                                         (is_update ?
 201                                          _("Update:") :
 202                                          _("CONFLICT:")
 203                                                 )
 204                                         );
 205                                 StrBufAppendPrintf(Target, "</dt><dd>");
 206                                 StrEscAppend(Target, NULL, conflict_message, 0, 0);
 207                                 StrBufAppendPrintf(Target, "</dd>\n");
 208                         }
 209                 }
 210                 lprintf(9, "...done.\n");
 211
 212                 StrBufAppendPrintf(Target, "</dl>");
 213
 214                 /* Display the Accept/Decline buttons */
 215                 StrBufAppendPrintf(Target, "<p id=\"%s_question\">"
 216                         "%s "
 217                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 218                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Accept');\">%s</a>"
 219                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 220                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Tentative');\">%s</a>"
 221                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 222                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Decline');\">%s</a>"
 223                         "</span></p>\n",
 224                         divname,
 225                         _("How would you like to respond to this invitation?"),
 226                         divname, divname, msgnum, cal_partnum, _("Accept"),
 227                         divname, divname, msgnum, cal_partnum, _("Tentative"),
 228                         divname, divname, msgnum, cal_partnum, _("Decline")
 229                         );
 230
 231         }
 232
 233         /* If this is a REPLY, display update button */
 234         if (the_method == ICAL_METHOD_REPLY) {
 235
 236                 /* In the future, if we want to validate this object before
 237                  * continuing, we can do it this way:
 238                  serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 239                  serv_getln(buf, sizeof buf);
 240                  }
 241                 ***********/
 242
 243                 /* Display the update buttons */
 244                 StrBufAppendPrintf(Target, "<p id=\"%s_question\" >"
 245                         "%s "
 246                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 247                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Update');\">%s</a>"
 248                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 249                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Ignore');\">%s</a>"
 250                         "</span></p>\n",
 251                         divname,
 252                         _("Click <i>Update</i> to accept this reply and update your calendar."),
 253                         divname, divname, msgnum, cal_partnum, _("Update"),
 254                         divname, divname, msgnum, cal_partnum, _("Ignore")
 255                         );
 256
 257         }
 258
 259         /* Trailing HTML for the display of this object */
 260         if (recursion_level == 0) {
 261                 StrBufAppendPrintf(Target, "<p>&nbsp;</p></div>\n");
 262         }
 263 }
 264
 265
 266 /**
 267  * \brief process calendar mail atachment
 268  * Deserialize a calendar object in a message so it can be processed.
 269  * (This is the main entry point for these things)
 270  * \param part_source the part of the message we want to parse
 271  * \param msgnum number of the mesage in our db
 272  * \param cal_partnum the number of the calendar item
 273  */
 274 void cal_process_attachment(wc_mime_attachment *Mime)
 275 {
 276         icalcomponent *cal;
 277
 278         cal = icalcomponent_new_from_string(ChrPtr(Mime->Data));
 279         FlushStrBuf(Mime->Data);
 280         if (cal == NULL) {
 281                 StrBufAppendPrintf(Mime->Data, _("There was an error parsing this calendar item."));
 282                 StrBufAppendPrintf(Mime->Data, "<br />\n");
 283                 return;
 284         }
 285
 286         cal_process_object(Mime->Data, cal, 0, Mime->msgnum, ChrPtr(Mime->PartNum));
 287
 288         /* Free the memory we obtained from libical's constructor */
 289         icalcomponent_free(cal);
 290 }
 291
 292
 293
 294
 295 /**
 296  * \brief accept/decline meeting
 297  * Respond to a meeting request
 298  */
 299 void respond_to_request(void)
 300 {
 301         char buf[1024];
 302
 303         begin_ajax_response();
 304
 305         serv_printf("ICAL respond|%s|%s|%s|",
 306                 bstr("msgnum"),
 307                 bstr("cal_partnum"),
 308                 bstr("sc")
 309         );
 310         serv_getln(buf, sizeof buf);
 311
 312         if (buf[0] == '2') {
 313                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 314                 if (!strcasecmp(bstr("sc"), "accept")) {
 315                         wprintf(_("You have accepted this meeting invitation.  "
 316                                 "It has been entered into your calendar.")
 317                         );
 318                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 319                         wprintf(_("You have tentatively accepted this meeting invitation.  "
 320                                 "It has been 'pencilled in' to your calendar.")
 321                         );
 322                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 323                         wprintf(_("You have declined this meeting invitation.  "
 324                                   "It has <b>not</b> been entered into your calendar.")
 325                                 );
 326                 }
 327                 wprintf(" ");
 328                 wprintf(_("A reply has been sent to the meeting organizer."));
 329                 wprintf("</span>");
 330         } else {
 331                 wprintf("<img align=\"center\" src=\"static/error.gif\"><span>");
 332                 wprintf("%s\n", &buf[4]);
 333                 wprintf("</span>");
 334         }
 335
 336         end_ajax_response();
 337 }
 338
 339
 340
 341 /**
 342  * \brief Handle an incoming RSVP
 343  */
 344 void handle_rsvp(void)
 345 {
 346         char buf[1024];
 347
 348         begin_ajax_response();
 349
 350         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 351                 bstr("msgnum"),
 352                 bstr("cal_partnum"),
 353                 bstr("sc")
 354         );
 355         serv_getln(buf, sizeof buf);
 356
 357         if (buf[0] == '2') {
 358                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 359                 if (!strcasecmp(bstr("sc"), "update")) {
 360                         wprintf(_("Your calendar has been updated to reflect this RSVP."));
 361                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 362                         wprintf(_("You have chosen to ignore this RSVP. "
 363                                   "Your calendar has <b>not</b> been updated.")
 364                                 );
 365                 }
 366                 wprintf("</span>");
 367         } else {
 368                 wprintf("<img src=\"static/error.gif\"><span> %s\n", &buf[4]);
 369                 wprintf("</span>");
 370         }
 371
 372         end_ajax_response();
 373 }
 374
 375
 376
 377
 378 /*
 379  * free memory allocated using libical
 380  */
 381 void delete_cal(void *vCal)
 382 {
 383         disp_cal *Cal = (disp_cal*) vCal;
 384         icalcomponent_free(Cal->cal);
 385         free(Cal->from);
 386         free(Cal);
 387 }
 388
 389 /*
 390  * This is the meat-and-bones of the first part of our two-phase calendar display.
 391  * As we encounter calendar items in messages being read from the server, we break out
 392  * any iCalendar objects and store them in a hash table.  Later on, the second phase will
 393  * use this hash table to render the calendar for display.
 394  */
 395 void display_individual_cal(icalcomponent *cal, long msgnum, char *from, int unread, struct calview *calv)
 396 {
 397         icalproperty *ps = NULL;
 398         struct icaltimetype dtstart, dtend;
 399         struct icaldurationtype dur;
 400         struct wcsession *WCC = WC;
 401         disp_cal *Cal;
 402         size_t len;
 403         time_t final_recurrence = 0;
 404         icalcomponent *cptr = NULL;
 405
 406         /* recur variables */
 407         icalproperty *rrule = NULL;
 408         struct icalrecurrencetype recur;
 409         icalrecur_iterator *ritr = NULL;
 410         struct icaltimetype next;
 411         int num_recur = 0;
 412
 413         dtstart = icaltime_null_time();
 414         dtend = icaltime_null_time();
 415
 416         if (WCC->disp_cal_items == NULL)
 417                 WCC->disp_cal_items = NewHash(0, Flathash);
 418
 419         /* Note: anything we do here, we also have to do below for the recurrences. */
 420         Cal = (disp_cal*) malloc(sizeof(disp_cal));
 421         memset(Cal, 0, sizeof(disp_cal));
 422         Cal->cal = icalcomponent_new_clone(cal);
 423
 424         /* Dezonify and decapsulate at the very last moment */
 425         /* lprintf(9, "INITIAL: %s\n", icaltime_as_ical_string(icalproperty_get_dtstart(
 426                 icalcomponent_get_first_property(icalcomponent_get_first_component(
 427                 Cal->cal, ICAL_VEVENT_COMPONENT), ICAL_DTSTART_PROPERTY)))
 428         ); */
 429         ical_dezonify(Cal->cal);
 430         if (icalcomponent_isa(Cal->cal) != ICAL_VEVENT_COMPONENT) {
 431                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 432                 if (cptr) {
 433                         cptr = icalcomponent_new_clone(cptr);
 434                         icalcomponent_free(Cal->cal);
 435                         Cal->cal = cptr;
 436                 }
 437         }
 438
 439         Cal->unread = unread;
 440         len = strlen(from);
 441         Cal->from = (char*)malloc(len+ 1);
 442         memcpy(Cal->from, from, len + 1);
 443         Cal->cal_msgnum = msgnum;
 444
 445         /* Precalculate the starting date and time of this event, and store it in our top-level
 446          * structure.  Later, when we are rendering the calendar, we can just peek at these values
 447          * without having to break apart every calendar item.
 448          */
 449         ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTSTART_PROPERTY);
 450         if (ps != NULL) {
 451                 dtstart = icalproperty_get_dtstart(ps);
 452                 Cal->event_start = icaltime_as_timet(dtstart);
 453         }
 454
 455         /* Do the same for the ending date and time.  It makes the day view much easier to render. */
 456         ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTEND_PROPERTY);
 457         if (ps != NULL) {
 458                 dtend = icalproperty_get_dtend(ps);
 459                 Cal->event_end = icaltime_as_timet(dtend);
 460         }
 461
 462         /* Store it in the hash list. */
 463         Put(WCC->disp_cal_items,
 464             (char*) &Cal->event_start,
 465             sizeof(Cal->event_start),
 466             Cal,
 467             delete_cal);
 468
 469         /****************************** handle recurring events ******************************/
 470
 471         if (icaltime_is_null_time(dtstart)) return;     /* Can't recur without a start time */
 472
 473         if (!icaltime_is_null_time(dtend)) {            /* Need duration for recurrences */
 474                 dur = icaltime_subtract(dtend, dtstart);
 475         }
 476
 477         /*
 478          * Just let libical iterate the recurrence, and keep looping back to the top of this function,
 479          * adding new hash entries that all point back to the same msgnum, until either the iteration
 480          * stops or some outer bound is reached.  The display code will automatically do the Right Thing.
 481          */
 482         cptr = cal;
 483         if (icalcomponent_isa(cptr) != ICAL_VEVENT_COMPONENT) {
 484                 cptr = icalcomponent_get_first_component(cptr, ICAL_VEVENT_COMPONENT);
 485         }
 486         if (!cptr) return;
 487         ps = icalcomponent_get_first_property(cptr, ICAL_DTSTART_PROPERTY);
 488         if (ps == NULL) return;
 489         dtstart = icalproperty_get_dtstart(ps);
 490         rrule = icalcomponent_get_first_property(cptr, ICAL_RRULE_PROPERTY);
 491         if (!rrule) return;
 492         recur = icalproperty_get_rrule(rrule);
 493         ritr = icalrecur_iterator_new(recur, dtstart);
 494         if (!ritr) return;
 495
 496         int stop_rr = 0;
 497         while (next = icalrecur_iterator_next(ritr), ((!icaltime_is_null_time(next))&&(!stop_rr)) ) {
 498                 ++num_recur;
 499                 if (num_recur > 1) {            /* Skip the first one.  We already did it at the root. */
 500                         /* lprintf(9, "REPEATS: %s\n", icaltime_as_ical_string(next)); */
 501
 502                         /* Note: anything we do here, we also have to do above for the root event. */
 503                         Cal = (disp_cal*) malloc(sizeof(disp_cal));
 504                         memset(Cal, 0, sizeof(disp_cal));
 505                         Cal->cal = icalcomponent_new_clone(cal);
 506                         Cal->unread = unread;
 507                         len = strlen(from);
 508                         Cal->from = (char*)malloc(len+ 1);
 509                         memcpy(Cal->from, from, len + 1);
 510                         Cal->cal_msgnum = msgnum;
 511
 512                         icalcomponent *cptr;
 513                         if (icalcomponent_isa(Cal->cal) == ICAL_VEVENT_COMPONENT) {
 514                                 cptr = Cal->cal;
 515                         }
 516                         else {
 517                                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 518                         }
 519                         if (cptr) {
 520                                 ps = icalcomponent_get_first_property(cptr, ICAL_DTSTART_PROPERTY);
 521                                 if (ps != NULL) {
 522                                         icalcomponent_remove_property(cptr, ps);
 523                                         ps = icalproperty_new_dtstart(next);
 524                                         icalcomponent_add_property(cptr, ps);
 525
 526                                         Cal->event_start = icaltime_as_timet(next);
 527                                         final_recurrence = Cal->event_start;
 528                                 }
 529
 530                                 ps = icalcomponent_get_first_property(cptr, ICAL_DTEND_PROPERTY);
 531                                 if (ps != NULL) {
 532                                         icalcomponent_remove_property(cptr, ps);
 533
 534                                         /* Make a new dtend */
 535                                         ps = icalproperty_new_dtend(icaltime_add(next, dur));
 536
 537                                         /* and stick it somewhere */
 538                                         icalcomponent_add_property(cptr, ps);
 539                                 }
 540
 541                         }
 542
 543                         /* Dezonify and decapsulate at the very last moment */
 544                         ical_dezonify(Cal->cal);
 545                         if (icalcomponent_isa(Cal->cal) != ICAL_VEVENT_COMPONENT) {
 546                                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 547                                 if (cptr) {
 548                                         cptr = icalcomponent_new_clone(cptr);
 549                                         icalcomponent_free(Cal->cal);
 550                                         Cal->cal = cptr;
 551                                 }
 552                         }
 553
 554                         if ( (Cal->event_start > calv->lower_bound)
 555                            && (Cal->event_start < calv->upper_bound) ) {
 556                                 Put(WCC->disp_cal_items,
 557                                         (char*) &Cal->event_start,
 558                                         sizeof(Cal->event_start),
 559                                         Cal,
 560                                         delete_cal
 561                                 );
 562                         }
 563                         else {
 564                                 delete_cal(Cal);
 565                         }
 566
 567                         /* If an upper bound is set, stop when we go out of scope */
 568                         if (final_recurrence > calv->upper_bound) stop_rr = 1;
 569                 }
 570         }
 571         icalrecur_iterator_free(ritr);
 572         /* lprintf(9, "Performed %d recurrences; final one is %s", num_recur, ctime(&final_recurrence)); */
 573
 574 }
 575
 576
 577
 578 /*
 579  * Display a task by itself (for editing)
 580  */
 581 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum, char *from,
 582                         int unread, struct calview *calv)
 583 {
 584         icalcomponent *vtodo;
 585         icalproperty *p;
 586         struct icaltimetype IcalTime;
 587         time_t now;
 588         int created_new_vtodo = 0;
 589         icalproperty_status todoStatus;
 590
 591         now = time(NULL);
 592
 593         if (supplied_vtodo != NULL) {
 594                 vtodo = supplied_vtodo;
 595
 596                 /**
 597                  * If we're looking at a fully encapsulated VCALENDAR
 598                  * rather than a VTODO component, attempt to use the first
 599                  * relevant VTODO subcomponent.  If there is none, the
 600                  * NULL returned by icalcomponent_get_first_component() will
 601                  * tell the next iteration of this function to create a
 602                  * new one.
 603                  */
 604                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 605                         display_edit_individual_task(
 606                                 icalcomponent_get_first_component(
 607                                         vtodo, ICAL_VTODO_COMPONENT
 608                                         ),
 609                                 msgnum, from, unread, calv
 610                                 );
 611                         return;
 612                 }
 613         }
 614         else {
 615                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 616                 created_new_vtodo = 1;
 617         }
 618
 619         // TODO: Can we take all this and move it into a template?
 620         output_headers(1, 1, 1, 0, 0, 0);
 621         wprintf("<!-- start task edit form -->");
 622         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 623         // Get summary early for title
 624         wprintf("<div class=\"box\">\n");
 625         wprintf("<div class=\"boxlabel\">");
 626         wprintf(_("Edit task"));
 627         wprintf("- ");
 628         if (p != NULL) {
 629                 escputs((char *)icalproperty_get_comment(p));
 630         }
 631         wprintf("</div>");
 632
 633         wprintf("<div class=\"boxcontent\">\n");
 634         wprintf("<FORM METHOD=\"POST\" action=\"save_task\">\n");
 635         wprintf("<div style=\"display: none;\">\n       ");
 636         wprintf("<input type=\"hidden\" name=\"nonce\" value=\"%d\">\n", WC->nonce);
 637         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 638                 msgnum);
 639         wprintf("</div>");
 640         wprintf("<table class=\"calendar_background\"><tr><td>");
 641         wprintf("<TABLE STYLE=\"border: none;\">\n");
 642
 643         wprintf("<TR><TD>");
 644         wprintf(_("Summary:"));
 645         wprintf("</TD><TD>"
 646                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 647                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 648         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 649         if (p != NULL) {
 650                 escputs((char *)icalproperty_get_comment(p));
 651         }
 652         wprintf("\"></TD></TR>\n");
 653
 654         wprintf("<TR><TD>");
 655         wprintf(_("Start date:"));
 656         wprintf("</TD><TD>");
 657         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 658         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"nodtstart\" ID=\"nodtstart\" VALUE=\"NODTSTART\" ");
 659         if (p == NULL) {
 660                 wprintf("CHECKED=\"CHECKED\"");
 661         }
 662         wprintf(">");
 663         wprintf(_("No date"));
 664
 665         wprintf(" ");
 666         wprintf(_("or"));
 667         wprintf(" ");
 668         if (p != NULL) {
 669                 IcalTime = icalproperty_get_dtstart(p);
 670         }
 671         else
 672                 IcalTime = icaltime_current_time_with_zone(get_default_icaltimezone());
 673         display_icaltimetype_as_webform(&IcalTime, "dtstart", 0);
 674         wprintf("</TD></TR>\n");
 675
 676         wprintf("<TR><TD>");
 677         wprintf(_("Due date:"));
 678         wprintf("</TD><TD>");
 679         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 680         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"nodue\" ID=\"nodue\" VALUE=\"NODUE\"");
 681         if (p == NULL) {
 682                 wprintf("CHECKED=\"CHECKED\"");
 683         }
 684         wprintf(">");
 685         wprintf(_("No date"));
 686         wprintf(" ");
 687         wprintf(_("or"));
 688         wprintf(" ");
 689         if (p != NULL) {
 690                 IcalTime = icalproperty_get_due(p);
 691         }
 692         else
 693                 IcalTime = icaltime_current_time_with_zone(get_default_icaltimezone());
 694         display_icaltimetype_as_webform(&IcalTime, "due", 0);
 695
 696         wprintf("</TD></TR>\n");
 697         todoStatus = icalcomponent_get_status(vtodo);
 698         wprintf("<TR><TD>\n");
 699         wprintf(_("Completed:"));
 700         wprintf("</TD><TD>");
 701         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"status\" VALUE=\"COMPLETED\"");
 702         if (todoStatus == ICAL_STATUS_COMPLETED) {
 703                 wprintf(" CHECKED=\"CHECKED\"");
 704         }
 705         wprintf(" >");
 706         wprintf("</TD></TR>");
 707         // start category field
 708         p = icalcomponent_get_first_property(vtodo, ICAL_CATEGORIES_PROPERTY);
 709         wprintf("<TR><TD>");
 710         wprintf(_("Category:"));
 711         wprintf("</TD><TD>");
 712         wprintf("<INPUT TYPE=\"text\" NAME=\"category\" MAXLENGTH=\"32\" SIZE=\"32\" VALUE=\"");
 713         if (p != NULL) {
 714                 escputs((char *)icalproperty_get_categories(p));
 715         }
 716         wprintf("\">");
 717         wprintf("</TD></TR>\n   ");
 718         // end category field
 719         wprintf("<TR><TD>");
 720         wprintf(_("Description:"));
 721         wprintf("</TD><TD>");
 722         wprintf("<TEXTAREA NAME=\"description\" "
 723                 "ROWS=\"10\" COLS=\"80\">\n"
 724                 );
 725         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 726         if (p != NULL) {
 727                 escputs((char *)icalproperty_get_comment(p));
 728         }
 729         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 730
 731         wprintf("<SPAN STYLE=\"text-align: center;\">"
 732                 "<INPUT TYPE=\"submit\" NAME=\"save_button\" VALUE=\"%s\">"
 733                 "&nbsp;&nbsp;"
 734                 "<INPUT TYPE=\"submit\" NAME=\"delete_button\" VALUE=\"%s\">\n"
 735                 "&nbsp;&nbsp;"
 736                 "<INPUT TYPE=\"submit\" NAME=\"cancel_button\" VALUE=\"%s\">\n"
 737                 "</SPAN>\n",
 738                 _("Save"),
 739                 _("Delete"),
 740                 _("Cancel")
 741                 );
 742         wprintf("</td></tr></table>");
 743         wprintf("</FORM>\n");
 744         wprintf("</div></div></div>\n");
 745         wprintf("<!-- end task edit form -->");
 746         wDumpContent(1);
 747
 748         if (created_new_vtodo) {
 749                 icalcomponent_free(vtodo);
 750         }
 751 }
 752
 753 /*
 754  * \brief Save an edited task
 755  * \param supplied_vtodo the task to save
 756  * \param msgnum number of the mesage in our db
 757  */
 758 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum, char* from, int unread,
 759                                 struct calview *calv)
 760 {
 761         char buf[SIZ];
 762         int delete_existing = 0;
 763         icalproperty *prop;
 764         icalcomponent *vtodo, *encaps;
 765         int created_new_vtodo = 0;
 766         int i;
 767         int sequence = 0;
 768         struct icaltimetype t;
 769
 770         if (supplied_vtodo != NULL) {
 771                 vtodo = supplied_vtodo;
 772                 /**
 773                  * If we're looking at a fully encapsulated VCALENDAR
 774                  * rather than a VTODO component, attempt to use the first
 775                  * relevant VTODO subcomponent.  If there is none, the
 776                  * NULL returned by icalcomponent_get_first_component() will
 777                  * tell the next iteration of this function to create a
 778                  * new one.
 779                  */
 780                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 781                         save_individual_task(
 782                                 icalcomponent_get_first_component(
 783                                         vtodo, ICAL_VTODO_COMPONENT),
 784                                 msgnum, from, unread, calv
 785                                 );
 786                         return;
 787                 }
 788         }
 789         else {
 790                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 791                 created_new_vtodo = 1;
 792         }
 793
 794         if (havebstr("save_button")) {
 795
 796                 /** Replace values in the component with ones from the form */
 797
 798                 while (prop = icalcomponent_get_first_property(vtodo,
 799                                                                ICAL_SUMMARY_PROPERTY), prop != NULL) {
 800                         icalcomponent_remove_property(vtodo, prop);
 801                         icalproperty_free(prop);
 802                 }
 803                 if (havebstr("summary")) {
 804
 805                         icalcomponent_add_property(vtodo,
 806                                                    icalproperty_new_summary(bstr("summary")));
 807                 } else {
 808                         icalcomponent_add_property(vtodo,
 809                                                    icalproperty_new_summary("Untitled Task"));
 810                 }
 811
 812                 while (prop = icalcomponent_get_first_property(vtodo,
 813                                                                ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 814                         icalcomponent_remove_property(vtodo, prop);
 815                         icalproperty_free(prop);
 816                 }
 817                 if (havebstr("description")) {
 818                         icalcomponent_add_property(vtodo,
 819                                                    icalproperty_new_description(bstr("description")));
 820                 }
 821
 822                 while (prop = icalcomponent_get_first_property(vtodo,
 823                                                                ICAL_DTSTART_PROPERTY), prop != NULL) {
 824                         icalcomponent_remove_property(vtodo, prop);
 825                         icalproperty_free(prop);
 826                 }
 827                 if (IsEmptyStr(bstr("nodtstart"))) {
 828                         icaltime_from_webform(&t, "dtstart");
 829                         icalcomponent_add_property(vtodo,
 830                                                    icalproperty_new_dtstart(t)
 831                                 );
 832                 }
 833                 while(prop = icalcomponent_get_first_property(vtodo,
 834                                                               ICAL_STATUS_PROPERTY), prop != NULL) {
 835                         icalcomponent_remove_property(vtodo,prop);
 836                         icalproperty_free(prop);
 837                 }
 838                 if (havebstr("status")) {
 839                         icalproperty_status taskStatus = icalproperty_string_to_status(
 840                                 bstr("status"));
 841                         icalcomponent_set_status(vtodo, taskStatus);
 842                 }
 843                 while (prop = icalcomponent_get_first_property(vtodo,
 844                                                                ICAL_CATEGORIES_PROPERTY), prop != NULL) {
 845                         icalcomponent_remove_property(vtodo,prop);
 846                         icalproperty_free(prop);
 847                 }
 848                 if (!IsEmptyStr(bstr("category"))) {
 849                         prop = icalproperty_new_categories(bstr("category"));
 850                         icalcomponent_add_property(vtodo,prop);
 851                 }
 852                 while (prop = icalcomponent_get_first_property(vtodo,
 853                                                                ICAL_DUE_PROPERTY), prop != NULL) {
 854                         icalcomponent_remove_property(vtodo, prop);
 855                         icalproperty_free(prop);
 856                 }
 857                 if (IsEmptyStr(bstr("nodue"))) {
 858                         icaltime_from_webform(&t, "due");
 859                         icalcomponent_add_property(vtodo,
 860                                                    icalproperty_new_due(t)
 861                                 );
 862                 }
 863                 /** Give this task a UID if it doesn't have one. */
 864                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 865                 if (icalcomponent_get_first_property(vtodo,
 866                                                      ICAL_UID_PROPERTY) == NULL) {
 867                         generate_uuid(buf);
 868                         icalcomponent_add_property(vtodo,
 869                                                    icalproperty_new_uid(buf)
 870                                 );
 871                 }
 872
 873                 /** Increment the sequence ID */
 874                 lprintf(9, "Increment the sequence ID\n");
 875                 while (prop = icalcomponent_get_first_property(vtodo,
 876                                                                ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 877                         i = icalproperty_get_sequence(prop);
 878                         lprintf(9, "Sequence was %d\n", i);
 879                         if (i > sequence) sequence = i;
 880                         icalcomponent_remove_property(vtodo, prop);
 881                         icalproperty_free(prop);
 882                 }
 883                 ++sequence;
 884                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 885                 icalcomponent_add_property(vtodo,
 886                                            icalproperty_new_sequence(sequence)
 887                         );
 888
 889                 /**
 890                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 891                  * for two reasons: one, it's easier to just free the whole thing
 892                  * when we're done instead of unbundling, but more importantly, we
 893                  * can't encapsulate something that may already be encapsulated
 894                  * somewhere else.
 895                  */
 896                 lprintf(9, "Encapsulating into a full VCALENDAR component\n");
 897                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 898
 899                 /* Serialize it and save it to the message base */
 900                 serv_puts("ENT0 1|||4");
 901                 serv_getln(buf, sizeof buf);
 902                 if (buf[0] == '4') {
 903                         serv_puts("Content-type: text/calendar");
 904                         serv_puts("");
 905                         serv_puts(icalcomponent_as_ical_string(encaps));
 906                         serv_puts("000");
 907
 908                         /**
 909                          * Probably not necessary; the server will see the UID
 910                          * of the object and delete the old one anyway, but
 911                          * just in case...
 912                          */
 913                         delete_existing = 1;
 914                 }
 915                 icalcomponent_free(encaps);
 916         }
 917
 918         /**
 919          * If the user clicked 'Delete' then explicitly delete the message.
 920          */
 921         if (havebstr("delete_button")) {
 922                 delete_existing = 1;
 923         }
 924
 925         if ( (delete_existing) && (msgnum > 0L) ) {
 926                 serv_printf("DELE %ld", lbstr("msgnum"));
 927                 serv_getln(buf, sizeof buf);
 928         }
 929
 930         if (created_new_vtodo) {
 931                 icalcomponent_free(vtodo);
 932         }
 933
 934         /** Go back to the task list */
 935         readloop(readfwd);
 936 }
 937
 938
 939
 940 /*
 941  * Code common to all icalendar display handlers.  Given a message number and a MIME
 942  * type, we load the message and hunt for that MIME type.  If found, we load
 943  * the relevant part, deserialize it into a libical component, filter it for
 944  * the requested object type, and feed it to the specified handler.
 945  */
 946 void load_ical_object(long msgnum, int unread,
 947                            icalcomponent_kind which_kind,
 948                            void (*callback)(icalcomponent *, long, char*, int, struct calview *),
 949                            struct calview *calv
 950         )
 951 {
 952         char buf[1024];
 953         char from[128] = "";
 954         char mime_partnum[256];
 955         char mime_filename[256];
 956         char mime_content_type[256];
 957         char mime_disposition[256];
 958         int mime_length;
 959         char relevant_partnum[256];
 960         char *relevant_source = NULL;
 961         icalcomponent *cal, *c;
 962
 963         relevant_partnum[0] = '\0';
 964         sprintf(buf, "MSG4 %ld", msgnum);       /* we need the mime headers */
 965         serv_puts(buf);
 966         serv_getln(buf, sizeof buf);
 967         if (buf[0] != '1') return;
 968
 969         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 970                 if (!strncasecmp(buf, "part=", 5)) {
 971                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 972                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 973                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 974                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 975                         mime_length = extract_int(&buf[5], 5);
 976
 977                         if (  (!strcasecmp(mime_content_type, "text/calendar"))
 978                               || (!strcasecmp(mime_content_type, "application/ics"))
 979                               || (!strcasecmp(mime_content_type, "text/vtodo"))
 980                                 ) {
 981                                 strcpy(relevant_partnum, mime_partnum);
 982                         }
 983                 }
 984                 else if (!strncasecmp(buf, "from=", 4)) {
 985                         extract_token(from, buf, 1, '=', sizeof(from));
 986                 }
 987         }
 988
 989         if (!IsEmptyStr(relevant_partnum)) {
 990                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 991                 if (relevant_source != NULL) {
 992
 993                         cal = icalcomponent_new_from_string(relevant_source);
 994                         if (cal != NULL) {
 995
 996                                 /* A which_kind of (-1) means just load the whole thing */
 997                                 if (which_kind == (-1)) {
 998                                         callback(cal, msgnum, from, unread, calv);
 999                                 }
1000
1001                                 /* Otherwise recurse and hunt */
1002                                 else {
1003
1004                                         /* Simple components of desired type */
1005                                         if (icalcomponent_isa(cal) == which_kind) {
1006                                                 callback(cal, msgnum, from, unread, calv);
1007                                         }
1008
1009                                         /* Subcomponents of desired type */
1010                                         for (c = icalcomponent_get_first_component(cal, which_kind);
1011                                         (c != 0);
1012                                         c = icalcomponent_get_next_component(cal, which_kind)) {
1013                                                 callback(c, msgnum, from, unread, calv);
1014                                         }
1015
1016                                 }
1017
1018                                 icalcomponent_free(cal);
1019                         }
1020                         free(relevant_source);
1021                 }
1022         }
1023         icalmemory_free_ring();
1024 }
1025
1026 /*
1027  * Display a calendar item
1028  */
1029 void load_calendar_item(message_summary *Msg, int unread, struct calview *c) {
1030         /*load_ical_object(Msg->msgnum, unread, ICAL_VEVENT_COMPONENT, display_individual_cal, c);*/
1031         load_ical_object(Msg->msgnum, unread, (-1), display_individual_cal, c);
1032 }
1033
1034 /*
1035  * Display task view
1036  */
1037 void display_task(message_summary *Msg, int unread) {
1038         load_ical_object(Msg->msgnum, unread, ICAL_VTODO_COMPONENT, display_individual_cal, NULL);
1039 }
1040
1041 /*
1042  * Display the editor component for a task
1043  */
1044 void display_edit_task(void) {
1045         long msgnum = 0L;
1046
1047         /* Force change the room if we have to */
1048         if (havebstr("taskrm")) {
1049                 gotoroom((char *)bstr("taskrm"));
1050         }
1051
1052         msgnum = lbstr("msgnum");
1053         if (msgnum > 0L) {
1054                 /* existing task */
1055                 load_ical_object(msgnum, 0,
1056                                       ICAL_VTODO_COMPONENT,
1057                                       display_edit_individual_task,
1058                                       NULL
1059                 );
1060         }
1061         else {
1062                 /* new task */
1063                 display_edit_individual_task(NULL, 0L, "", 0, NULL);
1064         }
1065 }
1066
1067 /*
1068  * save an edited task
1069  */
1070 void save_task(void) {
1071         long msgnum = 0L;
1072         msgnum = lbstr("msgnum");
1073         if (msgnum > 0L) {
1074                 load_ical_object(msgnum, 0, ICAL_VTODO_COMPONENT, save_individual_task, NULL);
1075         }
1076         else {
1077                 save_individual_task(NULL, 0L, "", 0, NULL);
1078         }
1079 }
1080
1081 /*
1082  * display the editor component for an event
1083  */
1084 void display_edit_event(void) {
1085         long msgnum = 0L;
1086
1087         msgnum = lbstr("msgnum");
1088         if (msgnum > 0L) {
1089                 /* existing event */
1090                 load_ical_object(msgnum, 0, ICAL_VEVENT_COMPONENT, display_edit_individual_event, NULL);
1091         }
1092         else {
1093                 /* new event */
1094                 display_edit_individual_event(NULL, 0L, "", 0, NULL);
1095         }
1096 }
1097
1098 /*
1099  * save an edited event
1100  */
1101 void save_event(void) {
1102         long msgnum = 0L;
1103
1104         msgnum = lbstr("msgnum");
1105
1106         if (msgnum > 0L) {
1107                 /* load_ical_object(msgnum, 0, ICAL_VEVENT_COMPONENT, save_individual_event, NULL); */
1108                 load_ical_object(msgnum, 0, (-1), save_individual_event, NULL);
1109         }
1110         else {
1111                 save_individual_event(NULL, 0L, "", 0, NULL);
1112         }
1113 }
1114
1115
1116
1117
1118
1119 /*
1120  * Anonymous request of freebusy data for a user
1121  */
1122 void do_freebusy(const char *req) {
1123         char who[SIZ];
1124         char buf[SIZ];
1125         int len;
1126         long lines;
1127
1128         extract_token(who, req, 1, ' ', sizeof who);
1129         if (!strncasecmp(who, "/freebusy/", 10)) {
1130                 strcpy(who, &who[10]);
1131         }
1132         unescape_input(who);
1133
1134         len = strlen(who);
1135         if ( (!strcasecmp(&who[len-4], ".vcf"))
1136              || (!strcasecmp(&who[len-4], ".ifb"))
1137              || (!strcasecmp(&who[len-4], ".vfb")) ) {
1138                 who[len-4] = 0;
1139         }
1140
1141         lprintf(9, "freebusy requested for <%s>\n", who);
1142         serv_printf("ICAL freebusy|%s", who);
1143         serv_getln(buf, sizeof buf);
1144
1145         if (buf[0] != '1') {
1146                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
1147                 output_headers(0, 0, 0, 0, 0, 0);
1148                 hprintf("Content-Type: text/plain\r\n");
1149                 wprintf("%s\n", &buf[4]);
1150                 end_burst();
1151                 return;
1152         }
1153
1154         read_server_text(WC->WBuf, &lines);
1155         http_transmit_thing("text/calendar", 0);
1156 }
1157
1158
1159
1160
1161
1162 void
1163 InitModule_CALENDAR
1164 (void)
1165 {
1166         WebcitAddUrlHandler(HKEY("display_edit_task"), display_edit_task, 0);
1167         WebcitAddUrlHandler(HKEY("save_task"), save_task, 0);
1168         WebcitAddUrlHandler(HKEY("display_edit_event"), display_edit_event, 0);
1169         WebcitAddUrlHandler(HKEY("save_event"), save_event, 0);
1170         WebcitAddUrlHandler(HKEY("respond_to_request"), respond_to_request, 0);
1171         WebcitAddUrlHandler(HKEY("handle_rsvp"), handle_rsvp, 0);
1172 }