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(icalcomponent *cal,
  20                         int recursion_level,
  21                         long msgnum,
  22                         char *cal_partnum)
  23 {
  24         icalcomponent *c;
  25         icalproperty *method = NULL;
  26         icalproperty_method the_method = ICAL_METHOD_NONE;
  27         icalproperty *p;
  28         struct icaltimetype t;
  29         time_t tt;
  30         char buf[256];
  31         char conflict_name[256];
  32         char conflict_message[256];
  33         int is_update = 0;
  34         char divname[32];
  35         static int divcount = 0;
  36
  37         sprintf(divname, "rsvp%04x", ++divcount);
  38
  39         /* Leading HTML for the display of this object */
  40         if (recursion_level == 0) {
  41                 wprintf("<div class=\"mimepart\">\n");
  42         }
  43
  44         /* Look for a method */
  45         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  46
  47         /* See what we need to do with this */
  48         if (method != NULL) {
  49                 the_method = icalproperty_get_method(method);
  50                 char *title;
  51
  52                 wprintf("<div id=\"%s_title\">", divname);
  53                 wprintf("<img src=\"static/calarea_48x.gif\">");
  54                 wprintf("<span>");
  55                 switch(the_method) {
  56                 case ICAL_METHOD_REQUEST:
  57                         title = _("Meeting invitation");
  58                         break;
  59                 case ICAL_METHOD_REPLY:
  60                         title = _("Attendee's reply to your invitation");
  61                         break;
  62                 case ICAL_METHOD_PUBLISH:
  63                         title = _("Published event");
  64                         break;
  65                 default:
  66                         title = _("This is an unknown type of calendar item.");
  67                         break;
  68                 }
  69                 wprintf("</span>");
  70
  71                 wprintf("&nbsp;&nbsp;%s",title);
  72                 wprintf("</div>");
  73         }
  74
  75         wprintf("<dl>");
  76         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
  77         if (p != NULL) {
  78                 wprintf("<dt>");
  79                 wprintf(_("Summary:"));
  80                 wprintf("</dt><dd>");
  81                 escputs((char *)icalproperty_get_comment(p));
  82                 wprintf("</dd>\n");
  83         }
  84
  85         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
  86         if (p != NULL) {
  87                 wprintf("<dt>");
  88                 wprintf(_("Location:"));
  89                 wprintf("</dt><dd>");
  90                 escputs((char *)icalproperty_get_comment(p));
  91                 wprintf("</dd>\n");
  92         }
  93
  94         /*
  95          * Only show start/end times if we're actually looking at the VEVENT
  96          * component.  Otherwise it shows bogus dates for things like timezone.
  97          */
  98         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
  99
 100                 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
 101                 if (p != NULL) {
 102                         t = icalproperty_get_dtstart(p);
 103
 104                         if (t.is_date) {
 105                                 struct tm d_tm;
 106                                 char d_str[32];
 107                                 memset(&d_tm, 0, sizeof d_tm);
 108                                 d_tm.tm_year = t.year - 1900;
 109                                 d_tm.tm_mon = t.month - 1;
 110                                 d_tm.tm_mday = t.day;
 111                                 wc_strftime(d_str, sizeof d_str, "%x", &d_tm);
 112                                 wprintf("<dt>");
 113                                 wprintf(_("Date:"));
 114                                 wprintf("</dt><dd>%s</dd>", d_str);
 115                         }
 116                         else {
 117                                 tt = icaltime_as_timet(t);
 118                                 webcit_fmt_date(buf, tt, 0);
 119                                 wprintf("<dt>");
 120                                 wprintf(_("Starting date/time:"));
 121                                 wprintf("</dt><dd>%s</dd>", buf);
 122                         }
 123                 }
 124
 125                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 126                 if (p != NULL) {
 127                         t = icalproperty_get_dtend(p);
 128                         tt = icaltime_as_timet(t);
 129                         webcit_fmt_date(buf, tt, 0);
 130                         wprintf("<dt>");
 131                         wprintf(_("Ending date/time:"));
 132                         wprintf("</dt><dd>%s</dd>", buf);
 133                 }
 134
 135         }
 136
 137         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 138         if (p != NULL) {
 139                 wprintf("<dt>");
 140                 wprintf(_("Description:"));
 141                 wprintf("</dt><dd>");
 142                 escputs((char *)icalproperty_get_comment(p));
 143                 wprintf("</dd>\n");
 144         }
 145
 146         /* If the component has attendees, iterate through them. */
 147         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY);
 148              (p != NULL);
 149              p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 150                 wprintf("<dt>");
 151                 wprintf(_("Attendee:"));
 152                 wprintf("</dt><dd>");
 153                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
 154                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 155
 156                         /** screen name or email address */
 157                         strcpy(buf, &buf[7]);
 158                         striplt(buf);
 159                         escputs(buf);
 160                         wprintf(" ");
 161
 162                         /** participant status */
 163                         partstat_as_string(buf, p);
 164                         escputs(buf);
 165                 }
 166                 wprintf("</dd>\n");
 167         }
 168
 169         /* If the component has subcomponents, recurse through them. */
 170         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 171              (c != 0);
 172              c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 173                 /* Recursively process subcomponent */
 174                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 175         }
 176
 177         /* If this is a REQUEST, display conflicts and buttons */
 178         if (the_method == ICAL_METHOD_REQUEST) {
 179
 180                 /* Check for conflicts */
 181                 lprintf(9, "Checking server calendar for conflicts...\n");
 182                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 183                 serv_getln(buf, sizeof buf);
 184                 if (buf[0] == '1') {
 185                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 186                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 187                                 is_update = extract_int(buf, 4);
 188
 189                                 if (is_update) {
 190                                         snprintf(conflict_message, sizeof conflict_message,
 191                                                  _("This is an update of '%s' which is already in your calendar."), conflict_name);
 192                                 }
 193                                 else {
 194                                         snprintf(conflict_message, sizeof conflict_message,
 195                                                  _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
 196                                 }
 197
 198                                 wprintf("<dt>%s",
 199                                         (is_update ?
 200                                          _("Update:") :
 201                                          _("CONFLICT:")
 202                                                 )
 203                                         );
 204                                 wprintf("</dt><dd>");
 205                                 escputs(conflict_message);
 206                                 wprintf("</dd>\n");
 207                         }
 208                 }
 209                 lprintf(9, "...done.\n");
 210
 211                 wprintf("</dl>");
 212
 213                 /* Display the Accept/Decline buttons */
 214                 wprintf("<p id=\"%s_question\">"
 215                         "%s "
 216                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 217                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Accept');\">%s</a>"
 218                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 219                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Tentative');\">%s</a>"
 220                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 221                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Decline');\">%s</a>"
 222                         "</span></p>\n",
 223                         divname,
 224                         _("How would you like to respond to this invitation?"),
 225                         divname, divname, msgnum, cal_partnum, _("Accept"),
 226                         divname, divname, msgnum, cal_partnum, _("Tentative"),
 227                         divname, divname, msgnum, cal_partnum, _("Decline")
 228                         );
 229
 230         }
 231
 232         /* If this is a REPLY, display update button */
 233         if (the_method == ICAL_METHOD_REPLY) {
 234
 235                 /* In the future, if we want to validate this object before
 236                  * continuing, we can do it this way:
 237                  serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 238                  serv_getln(buf, sizeof buf);
 239                  }
 240                 ***********/
 241
 242                 /* Display the update buttons */
 243                 wprintf("<p id=\"%s_question\" >"
 244                         "%s "
 245                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 246                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Update');\">%s</a>"
 247                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 248                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Ignore');\">%s</a>"
 249                         "</span></p>\n",
 250                         divname,
 251                         _("Click <i>Update</i> to accept this reply and update your calendar."),
 252                         divname, divname, msgnum, cal_partnum, _("Update"),
 253                         divname, divname, msgnum, cal_partnum, _("Ignore")
 254                         );
 255
 256         }
 257
 258         /* Trailing HTML for the display of this object */
 259         if (recursion_level == 0) {
 260                 wprintf("<p>&nbsp;</p></div>\n");
 261         }
 262 }
 263
 264
 265 /**
 266  * \brief process calendar mail atachment
 267  * Deserialize a calendar object in a message so it can be processed.
 268  * (This is the main entry point for these things)
 269  * \param part_source the part of the message we want to parse
 270  * \param msgnum number of the mesage in our db
 271  * \param cal_partnum the number of the calendar item
 272  */
 273 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum)
 274 {
 275         icalcomponent *cal;
 276
 277         cal = icalcomponent_new_from_string(part_source);
 278
 279         if (cal == NULL) {
 280                 wprintf(_("There was an error parsing this calendar item."));
 281                 wprintf("<br />\n");
 282                 return;
 283         }
 284
 285         ical_dezonify(cal);
 286         cal_process_object(cal, 0, msgnum, cal_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
 380
 381
 382 /**
 383  * \defgroup MsgDisplayHandlers Display handlers for message reading
 384  * \ingroup Calendaring
 385  */
 386
 387 /*@{*/
 388
 389 int Flathash(const char *str, long len)
 390 {
 391         if (len != sizeof (int))
 392                 return 0;
 393         else return *(int*)str;
 394 }
 395
 396
 397
 398 /**
 399  * \brief clean up ical memory
 400  * todo this could get trouble with future ical versions
 401  */
 402 void delete_cal(void *vCal)
 403 {
 404         disp_cal *Cal = (disp_cal*) vCal;
 405         icalcomponent_free(Cal->cal);
 406         free(Cal->from);
 407         free(Cal);
 408 }
 409
 410 /*
 411  * This is the meat-and-bones of the first part of our two-phase calendar display.
 412  * As we encounter calendar items in messages being read from the server, we break out
 413  * any iCalendar objects and store them in a hash table.  Later on, the second phase will
 414  * use this hash table to render the calendar for display.
 415  */
 416 void display_individual_cal(icalcomponent *cal, long msgnum, char *from, int unread)
 417 {
 418         icalproperty *ps = NULL;
 419         struct icaltimetype dtstart, dtend;
 420         struct wcsession *WCC = WC;
 421         disp_cal *Cal;
 422         size_t len;
 423
 424         /* recur variables */
 425         icalproperty *rrule = NULL;
 426         struct icalrecurrencetype recur;
 427         icalrecur_iterator *ritr = NULL;
 428         struct icaltimetype next;
 429         int num_recur = 0;
 430
 431         if (WCC->disp_cal_items == NULL)
 432                 WCC->disp_cal_items = NewHash(0, Flathash);
 433
 434         Cal = (disp_cal*) malloc(sizeof(disp_cal));
 435         memset(Cal, 0, sizeof(disp_cal));
 436
 437         Cal->cal = icalcomponent_new_clone(cal);
 438         Cal->unread = unread;
 439         len = strlen(from);
 440         Cal->from = (char*)malloc(len+ 1);
 441         memcpy(Cal->from, from, len + 1);
 442         ical_dezonify(Cal->cal);
 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_dtstart(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 #ifdef TECH_PREVIEW
 470
 471         /* handle recurring events (unfinished) */
 472
 473         /*
 474          * Just let libical iterate the recurrence, and keep looping back to the top of this function,
 475          * adding new hash entries that all point back to the same msgnum, until either the iteration
 476          * stops or some outer bound is reached.  The display code *should* automatically do the right
 477          * thing (but we'll have to see).
 478          */
 479
 480         rrule = icalcomponent_get_first_property(Cal->cal, ICAL_RRULE_PROPERTY);
 481         if (!rrule) return;
 482         recur = icalproperty_get_rrule(rrule);
 483         ritr = icalrecur_iterator_new(recur, dtstart);
 484         if (!ritr) return;
 485
 486         while (next = icalrecur_iterator_next(ritr), !icaltime_is_null_time(next) ) {
 487                 ++num_recur;
 488                 lprintf(9, "* Doing a recurrence %d\n", num_recur);
 489         }
 490
 491 #endif /* TECH_PREVIEW */
 492
 493 }
 494
 495
 496
 497 /*
 498  * Display a task by itself (for editing)
 499  */
 500 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum, char *from, int unread)
 501 {
 502         icalcomponent *vtodo;
 503         icalproperty *p;
 504         struct icaltimetype IcalTime;
 505         time_t now;
 506         int created_new_vtodo = 0;
 507         icalproperty_status todoStatus;
 508
 509         now = time(NULL);
 510
 511         if (supplied_vtodo != NULL) {
 512                 vtodo = supplied_vtodo;
 513
 514                 /**
 515                  * If we're looking at a fully encapsulated VCALENDAR
 516                  * rather than a VTODO component, attempt to use the first
 517                  * relevant VTODO subcomponent.  If there is none, the
 518                  * NULL returned by icalcomponent_get_first_component() will
 519                  * tell the next iteration of this function to create a
 520                  * new one.
 521                  */
 522                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 523                         display_edit_individual_task(
 524                                 icalcomponent_get_first_component(
 525                                         vtodo, ICAL_VTODO_COMPONENT
 526                                         ),
 527                                 msgnum,
 528                                 from, unread
 529                                 );
 530                         return;
 531                 }
 532         }
 533         else {
 534                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 535                 created_new_vtodo = 1;
 536         }
 537
 538         // TODO: Can we take all this and move it into a template?
 539         output_headers(1, 1, 1, 0, 0, 0);
 540         wprintf("<!-- start task edit form -->");
 541         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 542         // Get summary early for title
 543         wprintf("<div class=\"box\">\n");
 544         wprintf("<div class=\"boxlabel\">");
 545         wprintf(_("Edit task"));
 546         wprintf("- ");
 547         if (p != NULL) {
 548                 escputs((char *)icalproperty_get_comment(p));
 549         }
 550         wprintf("</div>");
 551
 552         wprintf("<div class=\"boxcontent\">\n");
 553         wprintf("<FORM METHOD=\"POST\" action=\"save_task\">\n");
 554         wprintf("<div style=\"display: none;\">\n       ");
 555         wprintf("<input type=\"hidden\" name=\"nonce\" value=\"%d\">\n", WC->nonce);
 556         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 557                 msgnum);
 558         wprintf("</div>");
 559         wprintf("<table class=\"calendar_background\"><tr><td>");
 560         wprintf("<TABLE STYLE=\"border: none;\">\n");
 561
 562         wprintf("<TR><TD>");
 563         wprintf(_("Summary:"));
 564         wprintf("</TD><TD>"
 565                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 566                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 567         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 568         if (p != NULL) {
 569                 escputs((char *)icalproperty_get_comment(p));
 570         }
 571         wprintf("\"></TD></TR>\n");
 572
 573         wprintf("<TR><TD>");
 574         wprintf(_("Start date:"));
 575         wprintf("</TD><TD>");
 576         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 577         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"nodtstart\" ID=\"nodtstart\" VALUE=\"NODTSTART\" ");
 578         if (p == NULL) {
 579                 wprintf("CHECKED=\"CHECKED\"");
 580         }
 581         wprintf(">");
 582         wprintf(_("No date"));
 583
 584         wprintf(" ");
 585         wprintf(_("or"));
 586         wprintf(" ");
 587         if (p != NULL) {
 588                 IcalTime = icalproperty_get_dtstart(p);
 589         }
 590         else
 591                 IcalTime = icaltime_current_time_with_zone(get_default_icaltimezone());
 592         display_icaltimetype_as_webform(&IcalTime, "dtstart");
 593         wprintf("</TD></TR>\n");
 594
 595         wprintf("<TR><TD>");
 596         wprintf(_("Due date:"));
 597         wprintf("</TD><TD>");
 598         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 599         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"nodue\" ID=\"nodue\" VALUE=\"NODUE\"");
 600         if (p == NULL) {
 601                 wprintf("CHECKED=\"CHECKED\"");
 602         }
 603         wprintf(">");
 604         wprintf(_("No date"));
 605         wprintf(" ");
 606         wprintf(_("or"));
 607         wprintf(" ");
 608         if (p != NULL) {
 609                 IcalTime = icalproperty_get_due(p);
 610         }
 611         else
 612                 IcalTime = icaltime_current_time_with_zone(get_default_icaltimezone());
 613         display_icaltimetype_as_webform(&IcalTime, "due");
 614
 615         wprintf("</TD></TR>\n");
 616         todoStatus = icalcomponent_get_status(vtodo);
 617         wprintf("<TR><TD>\n");
 618         wprintf(_("Completed:"));
 619         wprintf("</TD><TD>");
 620         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"status\" VALUE=\"COMPLETED\"");
 621         if (todoStatus == ICAL_STATUS_COMPLETED) {
 622                 wprintf(" CHECKED=\"CHECKED\"");
 623         }
 624         wprintf(" >");
 625         wprintf("</TD></TR>");
 626         // start category field
 627         p = icalcomponent_get_first_property(vtodo, ICAL_CATEGORIES_PROPERTY);
 628         wprintf("<TR><TD>");
 629         wprintf(_("Category:"));
 630         wprintf("</TD><TD>");
 631         wprintf("<INPUT TYPE=\"text\" NAME=\"category\" MAXLENGTH=\"32\" SIZE=\"32\" VALUE=\"");
 632         if (p != NULL) {
 633                 escputs((char *)icalproperty_get_categories(p));
 634         }
 635         wprintf("\">");
 636         wprintf("</TD></TR>\n   ");
 637         // end category field
 638         wprintf("<TR><TD>");
 639         wprintf(_("Description:"));
 640         wprintf("</TD><TD>");
 641         wprintf("<TEXTAREA NAME=\"description\" "
 642                 "ROWS=\"10\" COLS=\"80\">\n"
 643                 );
 644         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 645         if (p != NULL) {
 646                 escputs((char *)icalproperty_get_comment(p));
 647         }
 648         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 649
 650         wprintf("<SPAN STYLE=\"text-align: center;\">"
 651                 "<INPUT TYPE=\"submit\" NAME=\"save_button\" VALUE=\"%s\">"
 652                 "&nbsp;&nbsp;"
 653                 "<INPUT TYPE=\"submit\" NAME=\"delete_button\" VALUE=\"%s\">\n"
 654                 "&nbsp;&nbsp;"
 655                 "<INPUT TYPE=\"submit\" NAME=\"cancel_button\" VALUE=\"%s\">\n"
 656                 "</SPAN>\n",
 657                 _("Save"),
 658                 _("Delete"),
 659                 _("Cancel")
 660                 );
 661         wprintf("</td></tr></table>");
 662         wprintf("</FORM>\n");
 663         wprintf("</div></div></div>\n");
 664         wprintf("<!-- end task edit form -->");
 665         wDumpContent(1);
 666
 667         if (created_new_vtodo) {
 668                 icalcomponent_free(vtodo);
 669         }
 670 }
 671
 672 /*
 673  * \brief Save an edited task
 674  * \param supplied_vtodo the task to save
 675  * \param msgnum number of the mesage in our db
 676  */
 677 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum, char* from, int unread)
 678 {
 679         char buf[SIZ];
 680         int delete_existing = 0;
 681         icalproperty *prop;
 682         icalcomponent *vtodo, *encaps;
 683         int created_new_vtodo = 0;
 684         int i;
 685         int sequence = 0;
 686         struct icaltimetype t;
 687
 688         if (supplied_vtodo != NULL) {
 689                 vtodo = supplied_vtodo;
 690                 /**
 691                  * If we're looking at a fully encapsulated VCALENDAR
 692                  * rather than a VTODO component, attempt to use the first
 693                  * relevant VTODO subcomponent.  If there is none, the
 694                  * NULL returned by icalcomponent_get_first_component() will
 695                  * tell the next iteration of this function to create a
 696                  * new one.
 697                  */
 698                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 699                         save_individual_task(
 700                                 icalcomponent_get_first_component(
 701                                         vtodo, ICAL_VTODO_COMPONENT),
 702                                 msgnum, from, unread
 703                                 );
 704                         return;
 705                 }
 706         }
 707         else {
 708                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 709                 created_new_vtodo = 1;
 710         }
 711
 712         if (havebstr("save_button")) {
 713
 714                 /** Replace values in the component with ones from the form */
 715
 716                 while (prop = icalcomponent_get_first_property(vtodo,
 717                                                                ICAL_SUMMARY_PROPERTY), prop != NULL) {
 718                         icalcomponent_remove_property(vtodo, prop);
 719                         icalproperty_free(prop);
 720                 }
 721                 if (havebstr("summary")) {
 722
 723                         icalcomponent_add_property(vtodo,
 724                                                    icalproperty_new_summary(bstr("summary")));
 725                 } else {
 726                         icalcomponent_add_property(vtodo,
 727                                                    icalproperty_new_summary("Untitled Task"));
 728                 }
 729
 730                 while (prop = icalcomponent_get_first_property(vtodo,
 731                                                                ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 732                         icalcomponent_remove_property(vtodo, prop);
 733                         icalproperty_free(prop);
 734                 }
 735                 if (havebstr("description")) {
 736                         icalcomponent_add_property(vtodo,
 737                                                    icalproperty_new_description(bstr("description")));
 738                 }
 739
 740                 while (prop = icalcomponent_get_first_property(vtodo,
 741                                                                ICAL_DTSTART_PROPERTY), prop != NULL) {
 742                         icalcomponent_remove_property(vtodo, prop);
 743                         icalproperty_free(prop);
 744                 }
 745                 if (IsEmptyStr(bstr("nodtstart"))) {
 746                         icaltime_from_webform(&t, "dtstart");
 747                         icalcomponent_add_property(vtodo,
 748                                                    icalproperty_new_dtstart(t)
 749                                 );
 750                 }
 751                 while(prop = icalcomponent_get_first_property(vtodo,
 752                                                               ICAL_STATUS_PROPERTY), prop != NULL) {
 753                         icalcomponent_remove_property(vtodo,prop);
 754                         icalproperty_free(prop);
 755                 }
 756                 if (havebstr("status")) {
 757                         icalproperty_status taskStatus = icalproperty_string_to_status(
 758                                 bstr("status"));
 759                         icalcomponent_set_status(vtodo, taskStatus);
 760                 }
 761                 while (prop = icalcomponent_get_first_property(vtodo,
 762                                                                ICAL_CATEGORIES_PROPERTY), prop != NULL) {
 763                         icalcomponent_remove_property(vtodo,prop);
 764                         icalproperty_free(prop);
 765                 }
 766                 if (!IsEmptyStr(bstr("category"))) {
 767                         prop = icalproperty_new_categories(bstr("category"));
 768                         icalcomponent_add_property(vtodo,prop);
 769                 }
 770                 while (prop = icalcomponent_get_first_property(vtodo,
 771                                                                ICAL_DUE_PROPERTY), prop != NULL) {
 772                         icalcomponent_remove_property(vtodo, prop);
 773                         icalproperty_free(prop);
 774                 }
 775                 if (IsEmptyStr(bstr("nodue"))) {
 776                         icaltime_from_webform(&t, "due");
 777                         icalcomponent_add_property(vtodo,
 778                                                    icalproperty_new_due(t)
 779                                 );
 780                 }
 781                 /** Give this task a UID if it doesn't have one. */
 782                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 783                 if (icalcomponent_get_first_property(vtodo,
 784                                                      ICAL_UID_PROPERTY) == NULL) {
 785                         generate_uuid(buf);
 786                         icalcomponent_add_property(vtodo,
 787                                                    icalproperty_new_uid(buf)
 788                                 );
 789                 }
 790
 791                 /** Increment the sequence ID */
 792                 lprintf(9, "Increment the sequence ID\n");
 793                 while (prop = icalcomponent_get_first_property(vtodo,
 794                                                                ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 795                         i = icalproperty_get_sequence(prop);
 796                         lprintf(9, "Sequence was %d\n", i);
 797                         if (i > sequence) sequence = i;
 798                         icalcomponent_remove_property(vtodo, prop);
 799                         icalproperty_free(prop);
 800                 }
 801                 ++sequence;
 802                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 803                 icalcomponent_add_property(vtodo,
 804                                            icalproperty_new_sequence(sequence)
 805                         );
 806
 807                 /**
 808                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 809                  * for two reasons: one, it's easier to just free the whole thing
 810                  * when we're done instead of unbundling, but more importantly, we
 811                  * can't encapsulate something that may already be encapsulated
 812                  * somewhere else.
 813                  */
 814                 lprintf(9, "Encapsulating into a full VCALENDAR component\n");
 815                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 816
 817                 /* Serialize it and save it to the message base */
 818                 serv_puts("ENT0 1|||4");
 819                 serv_getln(buf, sizeof buf);
 820                 if (buf[0] == '4') {
 821                         serv_puts("Content-type: text/calendar");
 822                         serv_puts("");
 823                         serv_puts(icalcomponent_as_ical_string(encaps));
 824                         serv_puts("000");
 825
 826                         /**
 827                          * Probably not necessary; the server will see the UID
 828                          * of the object and delete the old one anyway, but
 829                          * just in case...
 830                          */
 831                         delete_existing = 1;
 832                 }
 833                 icalcomponent_free(encaps);
 834         }
 835
 836         /**
 837          * If the user clicked 'Delete' then explicitly delete the message.
 838          */
 839         if (havebstr("delete_button")) {
 840                 delete_existing = 1;
 841         }
 842
 843         if ( (delete_existing) && (msgnum > 0L) ) {
 844                 serv_printf("DELE %ld", lbstr("msgnum"));
 845                 serv_getln(buf, sizeof buf);
 846         }
 847
 848         if (created_new_vtodo) {
 849                 icalcomponent_free(vtodo);
 850         }
 851
 852         /** Go back to the task list */
 853         readloop("readfwd");
 854 }
 855
 856
 857
 858 /*
 859  * Code common to all icalendar display handlers.  Given a message number and a MIME
 860  * type, we load the message and hunt for that MIME type.  If found, we load
 861  * the relevant part, deserialize it into a libical component, filter it for
 862  * the requested object type, and feed it to the specified handler.
 863  */
 864 void display_using_handler(long msgnum, int unread,
 865                            icalcomponent_kind which_kind,
 866                            void (*callback)(icalcomponent *, long, char*, int)
 867         )
 868 {
 869         char buf[1024];
 870         char from[128] = "";
 871         char mime_partnum[256];
 872         char mime_filename[256];
 873         char mime_content_type[256];
 874         char mime_disposition[256];
 875         int mime_length;
 876         char relevant_partnum[256];
 877         char *relevant_source = NULL;
 878         icalcomponent *cal, *c;
 879
 880         relevant_partnum[0] = '\0';
 881         sprintf(buf, "MSG4 %ld", msgnum);       /* we need the mime headers */
 882         serv_puts(buf);
 883         serv_getln(buf, sizeof buf);
 884         if (buf[0] != '1') return;
 885
 886         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 887                 if (!strncasecmp(buf, "part=", 5)) {
 888                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 889                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 890                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 891                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 892                         mime_length = extract_int(&buf[5], 5);
 893
 894                         if (  (!strcasecmp(mime_content_type, "text/calendar"))
 895                               || (!strcasecmp(mime_content_type, "application/ics"))
 896                               || (!strcasecmp(mime_content_type, "text/vtodo"))
 897                                 ) {
 898                                 strcpy(relevant_partnum, mime_partnum);
 899                         }
 900                 }
 901                 else if (!strncasecmp(buf, "from=", 4)) {
 902                         extract_token(from, buf, 1, '=', sizeof(from));
 903                 }
 904         }
 905
 906         if (!IsEmptyStr(relevant_partnum)) {
 907                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 908                 if (relevant_source != NULL) {
 909
 910                         cal = icalcomponent_new_from_string(relevant_source);
 911                         if (cal != NULL) {
 912
 913                                 ical_dezonify(cal);
 914
 915                                 /* Simple components of desired type */
 916                                 if (icalcomponent_isa(cal) == which_kind) {
 917                                         callback(cal, msgnum, from, unread);
 918                                 }
 919
 920                                 /* Subcomponents of desired type */
 921                                 for (c = icalcomponent_get_first_component(cal, which_kind);
 922                                      (c != 0);
 923                                      c = icalcomponent_get_next_component(cal, which_kind)) {
 924                                         callback(c, msgnum, from, unread);
 925                                 }
 926                                 icalcomponent_free(cal);
 927                         }
 928                         free(relevant_source);
 929                 }
 930         }
 931         icalmemory_free_ring();
 932 }
 933
 934 /*
 935  * Display a calendar item
 936  */
 937 void display_calendar(long msgnum, int unread) {
 938         display_using_handler(msgnum, unread, ICAL_VEVENT_COMPONENT, display_individual_cal);
 939 }
 940
 941 /*
 942  * Display task view
 943  */
 944 void display_task(long msgnum, int unread) {
 945         display_using_handler(msgnum, unread, ICAL_VTODO_COMPONENT, display_individual_cal);
 946 }
 947
 948 /*
 949  * Display the editor component for a task
 950  */
 951 void display_edit_task(void) {
 952         long msgnum = 0L;
 953
 954         /* Force change the room if we have to */
 955         if (havebstr("taskrm")) {
 956                 gotoroom((char *)bstr("taskrm"));
 957         }
 958
 959         msgnum = lbstr("msgnum");
 960         if (msgnum > 0L) {
 961                 /* existing task */
 962                 display_using_handler(msgnum, 0,
 963                                       ICAL_VTODO_COMPONENT,
 964                                       display_edit_individual_task);
 965         }
 966         else {
 967                 /* new task */
 968                 display_edit_individual_task(NULL, 0L, "", 0);
 969         }
 970 }
 971
 972 /*
 973  * save an edited task
 974  */
 975 void save_task(void) {
 976         long msgnum = 0L;
 977
 978         msgnum = lbstr("msgnum");
 979         if (msgnum > 0L) {
 980                 display_using_handler(msgnum, 0, ICAL_VTODO_COMPONENT, save_individual_task);
 981         }
 982         else {
 983                 save_individual_task(NULL, 0L, "", 0);
 984         }
 985 }
 986
 987 /*
 988  * display the editor component for an event
 989  */
 990 void display_edit_event(void) {
 991         long msgnum = 0L;
 992
 993         msgnum = lbstr("msgnum");
 994         if (msgnum > 0L) {
 995                 /* existing event */
 996                 display_using_handler(msgnum, 0, ICAL_VEVENT_COMPONENT, display_edit_individual_event);
 997         }
 998         else {
 999                 /* new event */
1000                 display_edit_individual_event(NULL, 0L, "", 0);
1001         }
1002 }
1003
1004 /*
1005  * save an edited event
1006  */
1007 void save_event(void) {
1008         long msgnum = 0L;
1009
1010         msgnum = lbstr("msgnum");
1011
1012         if (msgnum > 0L) {
1013                 display_using_handler(msgnum, 0, ICAL_VEVENT_COMPONENT, save_individual_event);
1014         }
1015         else {
1016                 save_individual_event(NULL, 0L, "", 0);
1017         }
1018 }
1019
1020
1021
1022
1023
1024 /*
1025  * Anonymous request of freebusy data for a user
1026  */
1027 void do_freebusy(char *req) {
1028         char who[SIZ];
1029         char buf[SIZ];
1030         char *fb;
1031         int len;
1032
1033         extract_token(who, req, 1, ' ', sizeof who);
1034         if (!strncasecmp(who, "/freebusy/", 10)) {
1035                 strcpy(who, &who[10]);
1036         }
1037         unescape_input(who);
1038
1039         len = strlen(who);
1040         if ( (!strcasecmp(&who[len-4], ".vcf"))
1041              || (!strcasecmp(&who[len-4], ".ifb"))
1042              || (!strcasecmp(&who[len-4], ".vfb")) ) {
1043                 who[len-4] = 0;
1044         }
1045
1046         lprintf(9, "freebusy requested for <%s>\n", who);
1047         serv_printf("ICAL freebusy|%s", who);
1048         serv_getln(buf, sizeof buf);
1049
1050         if (buf[0] != '1') {
1051                 wprintf("HTTP/1.1 404 %s\n", &buf[4]);
1052                 output_headers(0, 0, 0, 0, 0, 0);
1053                 wprintf("Content-Type: text/plain\r\n");
1054                 wprintf("\r\n");
1055                 wprintf("%s\n", &buf[4]);
1056                 return;
1057         }
1058
1059         fb = read_server_text();
1060         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
1061         free(fb);
1062 }
1063
1064
1065
1066
1067
1068 void
1069 InitModule_CALENDAR
1070 (void)
1071 {
1072         WebcitAddUrlHandler(HKEY("display_edit_task"), display_edit_task, 0);
1073         WebcitAddUrlHandler(HKEY("save_task"), save_task, 0);
1074         WebcitAddUrlHandler(HKEY("display_edit_event"), display_edit_event, 0);
1075         WebcitAddUrlHandler(HKEY("save_event"), save_event, 0);
1076         WebcitAddUrlHandler(HKEY("respond_to_request"), respond_to_request, 0);
1077         WebcitAddUrlHandler(HKEY("handle_rsvp"), handle_rsvp, 0);
1078 }