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         int num_recur = 0;
 424
 425         if (WCC->disp_cal_items == NULL)
 426                 WCC->disp_cal_items = NewHash(0, Flathash);
 427
 428         Cal = (disp_cal*) malloc(sizeof(disp_cal));
 429         memset(Cal, 0, sizeof(disp_cal));
 430
 431         Cal->cal = icalcomponent_new_clone(cal);
 432         Cal->unread = unread;
 433         len = strlen(from);
 434         Cal->from = (char*)malloc(len+ 1);
 435         memcpy(Cal->from, from, len + 1);
 436         ical_dezonify(Cal->cal);
 437         Cal->cal_msgnum = msgnum;
 438
 439         /* Precalculate the starting date and time of this event, and store it in our top-level
 440          * structure.  Later, when we are rendering the calendar, we can just peek at these values
 441          * without having to break apart every calendar item.
 442          */
 443         ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTSTART_PROPERTY);
 444         if (ps != NULL) {
 445                 dtstart = icalproperty_get_dtstart(ps);
 446                 Cal->event_start = icaltime_as_timet(dtstart);
 447         }
 448
 449         /* Do the same for the ending date and time.  It makes the day view much easier to render. */
 450         ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTEND_PROPERTY);
 451         if (ps != NULL) {
 452                 dtend = icalproperty_get_dtstart(ps);
 453                 Cal->event_end = icaltime_as_timet(dtend);
 454         }
 455
 456         /* Store it in the hash list. */
 457         Put(WCC->disp_cal_items,
 458             (char*) &Cal->event_start,
 459             sizeof(Cal->event_start),
 460             Cal,
 461             delete_cal);
 462
 463 #ifdef TECH_PREVIEW
 464
 465         /* handle recurring events (unfinished) */
 466
 467         /*
 468          * Just let libical iterate the recurrence, and keep looping back to the top of this function,
 469          * adding new hash entries that all point back to the same msgnum, until either the iteration
 470          * stops or some outer bound is reached.  The display code *should* automatically do the right
 471          * thing (but we'll have to see).
 472          */
 473
 474         icalproperty *rrule = icalcomponent_get_first_property(Cal->cal, ICAL_RRULE_PROPERTY);
 475         if (!rrule) return;
 476         struct icalrecurrencetype recur = icalproperty_get_rrule(rrule);
 477         icalrecur_iterator *ritr = icalrecur_iterator_new(recur, dtstart);
 478         if (!ritr) return;
 479
 480         struct icaltimetype next;
 481         while (next = icalrecur_iterator_next(ritr), !icaltime_is_null_time(next) ) {
 482                 ++num_recur;
 483                 lprintf(9, "* Doing a recurrence %d\n", num_recur);
 484         }
 485
 486 #endif /* TECH_PREVIEW */
 487
 488 }
 489
 490
 491
 492 /*
 493  * Display a task by itself (for editing)
 494  */
 495 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum, char *from, int unread)
 496 {
 497         icalcomponent *vtodo;
 498         icalproperty *p;
 499         struct icaltimetype IcalTime;
 500         time_t now;
 501         int created_new_vtodo = 0;
 502         icalproperty_status todoStatus;
 503
 504         now = time(NULL);
 505
 506         if (supplied_vtodo != NULL) {
 507                 vtodo = supplied_vtodo;
 508
 509                 /**
 510                  * If we're looking at a fully encapsulated VCALENDAR
 511                  * rather than a VTODO component, attempt to use the first
 512                  * relevant VTODO subcomponent.  If there is none, the
 513                  * NULL returned by icalcomponent_get_first_component() will
 514                  * tell the next iteration of this function to create a
 515                  * new one.
 516                  */
 517                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 518                         display_edit_individual_task(
 519                                 icalcomponent_get_first_component(
 520                                         vtodo, ICAL_VTODO_COMPONENT
 521                                         ),
 522                                 msgnum,
 523                                 from, unread
 524                                 );
 525                         return;
 526                 }
 527         }
 528         else {
 529                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 530                 created_new_vtodo = 1;
 531         }
 532
 533         // TODO: Can we take all this and move it into a template?
 534         output_headers(1, 1, 1, 0, 0, 0);
 535         wprintf("<!-- start task edit form -->");
 536         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 537         // Get summary early for title
 538         wprintf("<div class=\"box\">\n");
 539         wprintf("<div class=\"boxlabel\">");
 540         wprintf(_("Edit task"));
 541         wprintf("- ");
 542         if (p != NULL) {
 543                 escputs((char *)icalproperty_get_comment(p));
 544         }
 545         wprintf("</div>");
 546
 547         wprintf("<div class=\"boxcontent\">\n");
 548         wprintf("<FORM METHOD=\"POST\" action=\"save_task\">\n");
 549         wprintf("<div style=\"display: none;\">\n       ");
 550         wprintf("<input type=\"hidden\" name=\"nonce\" value=\"%d\">\n", WC->nonce);
 551         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 552                 msgnum);
 553         wprintf("</div>");
 554         wprintf("<table class=\"calendar_background\"><tr><td>");
 555         wprintf("<TABLE STYLE=\"border: none;\">\n");
 556
 557         wprintf("<TR><TD>");
 558         wprintf(_("Summary:"));
 559         wprintf("</TD><TD>"
 560                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 561                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 562         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 563         if (p != NULL) {
 564                 escputs((char *)icalproperty_get_comment(p));
 565         }
 566         wprintf("\"></TD></TR>\n");
 567
 568         wprintf("<TR><TD>");
 569         wprintf(_("Start date:"));
 570         wprintf("</TD><TD>");
 571         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 572         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"nodtstart\" ID=\"nodtstart\" VALUE=\"NODTSTART\" ");
 573         if (p == NULL) {
 574                 wprintf("CHECKED=\"CHECKED\"");
 575         }
 576         wprintf(">");
 577         wprintf(_("No date"));
 578
 579         wprintf(" ");
 580         wprintf(_("or"));
 581         wprintf(" ");
 582         if (p != NULL) {
 583                 IcalTime = icalproperty_get_dtstart(p);
 584         }
 585         else
 586                 IcalTime = icaltime_current_time_with_zone(get_default_icaltimezone());
 587         display_icaltimetype_as_webform(&IcalTime, "dtstart");
 588         wprintf("</TD></TR>\n");
 589
 590         wprintf("<TR><TD>");
 591         wprintf(_("Due date:"));
 592         wprintf("</TD><TD>");
 593         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 594         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"nodue\" ID=\"nodue\" VALUE=\"NODUE\"");
 595         if (p == NULL) {
 596                 wprintf("CHECKED=\"CHECKED\"");
 597         }
 598         wprintf(">");
 599         wprintf(_("No date"));
 600         wprintf(" ");
 601         wprintf(_("or"));
 602         wprintf(" ");
 603         if (p != NULL) {
 604                 IcalTime = icalproperty_get_due(p);
 605         }
 606         else
 607                 IcalTime = icaltime_current_time_with_zone(get_default_icaltimezone());
 608         display_icaltimetype_as_webform(&IcalTime, "due");
 609
 610         wprintf("</TD></TR>\n");
 611         todoStatus = icalcomponent_get_status(vtodo);
 612         wprintf("<TR><TD>\n");
 613         wprintf(_("Completed:"));
 614         wprintf("</TD><TD>");
 615         wprintf("<INPUT TYPE=\"CHECKBOX\" NAME=\"status\" VALUE=\"COMPLETED\"");
 616         if (todoStatus == ICAL_STATUS_COMPLETED) {
 617                 wprintf(" CHECKED=\"CHECKED\"");
 618         }
 619         wprintf(" >");
 620         wprintf("</TD></TR>");
 621         // start category field
 622         p = icalcomponent_get_first_property(vtodo, ICAL_CATEGORIES_PROPERTY);
 623         wprintf("<TR><TD>");
 624         wprintf(_("Category:"));
 625         wprintf("</TD><TD>");
 626         wprintf("<INPUT TYPE=\"text\" NAME=\"category\" MAXLENGTH=\"32\" SIZE=\"32\" VALUE=\"");
 627         if (p != NULL) {
 628                 escputs((char *)icalproperty_get_categories(p));
 629         }
 630         wprintf("\">");
 631         wprintf("</TD></TR>\n   ");
 632         // end category field
 633         wprintf("<TR><TD>");
 634         wprintf(_("Description:"));
 635         wprintf("</TD><TD>");
 636         wprintf("<TEXTAREA NAME=\"description\" "
 637                 "ROWS=\"10\" COLS=\"80\">\n"
 638                 );
 639         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 640         if (p != NULL) {
 641                 escputs((char *)icalproperty_get_comment(p));
 642         }
 643         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 644
 645         wprintf("<SPAN STYLE=\"text-align: center;\">"
 646                 "<INPUT TYPE=\"submit\" NAME=\"save_button\" VALUE=\"%s\">"
 647                 "&nbsp;&nbsp;"
 648                 "<INPUT TYPE=\"submit\" NAME=\"delete_button\" VALUE=\"%s\">\n"
 649                 "&nbsp;&nbsp;"
 650                 "<INPUT TYPE=\"submit\" NAME=\"cancel_button\" VALUE=\"%s\">\n"
 651                 "</SPAN>\n",
 652                 _("Save"),
 653                 _("Delete"),
 654                 _("Cancel")
 655                 );
 656         wprintf("</td></tr></table>");
 657         wprintf("</FORM>\n");
 658         wprintf("</div></div></div>\n");
 659         wprintf("<!-- end task edit form -->");
 660         wDumpContent(1);
 661
 662         if (created_new_vtodo) {
 663                 icalcomponent_free(vtodo);
 664         }
 665 }
 666
 667 /*
 668  * \brief Save an edited task
 669  * \param supplied_vtodo the task to save
 670  * \param msgnum number of the mesage in our db
 671  */
 672 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum, char* from, int unread)
 673 {
 674         char buf[SIZ];
 675         int delete_existing = 0;
 676         icalproperty *prop;
 677         icalcomponent *vtodo, *encaps;
 678         int created_new_vtodo = 0;
 679         int i;
 680         int sequence = 0;
 681         struct icaltimetype t;
 682
 683         if (supplied_vtodo != NULL) {
 684                 vtodo = supplied_vtodo;
 685                 /**
 686                  * If we're looking at a fully encapsulated VCALENDAR
 687                  * rather than a VTODO component, attempt to use the first
 688                  * relevant VTODO subcomponent.  If there is none, the
 689                  * NULL returned by icalcomponent_get_first_component() will
 690                  * tell the next iteration of this function to create a
 691                  * new one.
 692                  */
 693                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 694                         save_individual_task(
 695                                 icalcomponent_get_first_component(
 696                                         vtodo, ICAL_VTODO_COMPONENT),
 697                                 msgnum, from, unread
 698                                 );
 699                         return;
 700                 }
 701         }
 702         else {
 703                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 704                 created_new_vtodo = 1;
 705         }
 706
 707         if (havebstr("save_button")) {
 708
 709                 /** Replace values in the component with ones from the form */
 710
 711                 while (prop = icalcomponent_get_first_property(vtodo,
 712                                                                ICAL_SUMMARY_PROPERTY), prop != NULL) {
 713                         icalcomponent_remove_property(vtodo, prop);
 714                         icalproperty_free(prop);
 715                 }
 716                 if (havebstr("summary")) {
 717
 718                         icalcomponent_add_property(vtodo,
 719                                                    icalproperty_new_summary(bstr("summary")));
 720                 } else {
 721                         icalcomponent_add_property(vtodo,
 722                                                    icalproperty_new_summary("Untitled Task"));
 723                 }
 724
 725                 while (prop = icalcomponent_get_first_property(vtodo,
 726                                                                ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 727                         icalcomponent_remove_property(vtodo, prop);
 728                         icalproperty_free(prop);
 729                 }
 730                 if (havebstr("description")) {
 731                         icalcomponent_add_property(vtodo,
 732                                                    icalproperty_new_description(bstr("description")));
 733                 }
 734
 735                 while (prop = icalcomponent_get_first_property(vtodo,
 736                                                                ICAL_DTSTART_PROPERTY), prop != NULL) {
 737                         icalcomponent_remove_property(vtodo, prop);
 738                         icalproperty_free(prop);
 739                 }
 740                 if (IsEmptyStr(bstr("nodtstart"))) {
 741                         icaltime_from_webform(&t, "dtstart");
 742                         icalcomponent_add_property(vtodo,
 743                                                    icalproperty_new_dtstart(t)
 744                                 );
 745                 }
 746                 while(prop = icalcomponent_get_first_property(vtodo,
 747                                                               ICAL_STATUS_PROPERTY), prop != NULL) {
 748                         icalcomponent_remove_property(vtodo,prop);
 749                         icalproperty_free(prop);
 750                 }
 751                 if (havebstr("status")) {
 752                         icalproperty_status taskStatus = icalproperty_string_to_status(
 753                                 bstr("status"));
 754                         icalcomponent_set_status(vtodo, taskStatus);
 755                 }
 756                 while (prop = icalcomponent_get_first_property(vtodo,
 757                                                                ICAL_CATEGORIES_PROPERTY), prop != NULL) {
 758                         icalcomponent_remove_property(vtodo,prop);
 759                         icalproperty_free(prop);
 760                 }
 761                 if (!IsEmptyStr(bstr("category"))) {
 762                         prop = icalproperty_new_categories(bstr("category"));
 763                         icalcomponent_add_property(vtodo,prop);
 764                 }
 765                 while (prop = icalcomponent_get_first_property(vtodo,
 766                                                                ICAL_DUE_PROPERTY), prop != NULL) {
 767                         icalcomponent_remove_property(vtodo, prop);
 768                         icalproperty_free(prop);
 769                 }
 770                 if (IsEmptyStr(bstr("nodue"))) {
 771                         icaltime_from_webform(&t, "due");
 772                         icalcomponent_add_property(vtodo,
 773                                                    icalproperty_new_due(t)
 774                                 );
 775                 }
 776                 /** Give this task a UID if it doesn't have one. */
 777                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 778                 if (icalcomponent_get_first_property(vtodo,
 779                                                      ICAL_UID_PROPERTY) == NULL) {
 780                         generate_uuid(buf);
 781                         icalcomponent_add_property(vtodo,
 782                                                    icalproperty_new_uid(buf)
 783                                 );
 784                 }
 785
 786                 /** Increment the sequence ID */
 787                 lprintf(9, "Increment the sequence ID\n");
 788                 while (prop = icalcomponent_get_first_property(vtodo,
 789                                                                ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 790                         i = icalproperty_get_sequence(prop);
 791                         lprintf(9, "Sequence was %d\n", i);
 792                         if (i > sequence) sequence = i;
 793                         icalcomponent_remove_property(vtodo, prop);
 794                         icalproperty_free(prop);
 795                 }
 796                 ++sequence;
 797                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 798                 icalcomponent_add_property(vtodo,
 799                                            icalproperty_new_sequence(sequence)
 800                         );
 801
 802                 /**
 803                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 804                  * for two reasons: one, it's easier to just free the whole thing
 805                  * when we're done instead of unbundling, but more importantly, we
 806                  * can't encapsulate something that may already be encapsulated
 807                  * somewhere else.
 808                  */
 809                 lprintf(9, "Encapsulating into a full VCALENDAR component\n");
 810                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 811
 812                 /* Serialize it and save it to the message base */
 813                 serv_puts("ENT0 1|||4");
 814                 serv_getln(buf, sizeof buf);
 815                 if (buf[0] == '4') {
 816                         serv_puts("Content-type: text/calendar");
 817                         serv_puts("");
 818                         serv_puts(icalcomponent_as_ical_string(encaps));
 819                         serv_puts("000");
 820
 821                         /**
 822                          * Probably not necessary; the server will see the UID
 823                          * of the object and delete the old one anyway, but
 824                          * just in case...
 825                          */
 826                         delete_existing = 1;
 827                 }
 828                 icalcomponent_free(encaps);
 829         }
 830
 831         /**
 832          * If the user clicked 'Delete' then explicitly delete the message.
 833          */
 834         if (havebstr("delete_button")) {
 835                 delete_existing = 1;
 836         }
 837
 838         if ( (delete_existing) && (msgnum > 0L) ) {
 839                 serv_printf("DELE %ld", lbstr("msgnum"));
 840                 serv_getln(buf, sizeof buf);
 841         }
 842
 843         if (created_new_vtodo) {
 844                 icalcomponent_free(vtodo);
 845         }
 846
 847         /** Go back to the task list */
 848         readloop("readfwd");
 849 }
 850
 851
 852
 853 /**
 854  * \brief generic item handler
 855  * Code common to all display handlers.  Given a message number and a MIME
 856  * type, we load the message and hunt for that MIME type.  If found, we load
 857  * the relevant part, deserialize it into a libical component, filter it for
 858  * the requested object type, and feed it to the specified handler.
 859  * \param mimetype mimetyp of our object
 860  * \param which_kind sort of ical type
 861  * \param msgnum number of the mesage in our db
 862  * \param callback a funcion \todo
 863  *
 864  */
 865 void display_using_handler(long msgnum, int unread,
 866                            icalcomponent_kind which_kind,
 867                            void (*callback)(icalcomponent *, long, char*, int)
 868         )
 869 {
 870         char buf[1024];
 871         char from[128] = "";
 872         char mime_partnum[256];
 873         char mime_filename[256];
 874         char mime_content_type[256];
 875         char mime_disposition[256];
 876         int mime_length;
 877         char relevant_partnum[256];
 878         char *relevant_source = NULL;
 879         icalcomponent *cal, *c;
 880
 881         relevant_partnum[0] = '\0';
 882         sprintf(buf, "MSG4 %ld", msgnum);       /* we need the mime headers */
 883         serv_puts(buf);
 884         serv_getln(buf, sizeof buf);
 885         if (buf[0] != '1') return;
 886
 887         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 888                 if (!strncasecmp(buf, "part=", 5)) {
 889                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 890                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 891                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 892                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 893                         mime_length = extract_int(&buf[5], 5);
 894
 895                         if (  (!strcasecmp(mime_content_type, "text/calendar"))
 896                               || (!strcasecmp(mime_content_type, "application/ics"))
 897                               || (!strcasecmp(mime_content_type, "text/vtodo"))
 898                                 ) {
 899                                 strcpy(relevant_partnum, mime_partnum);
 900                         }
 901                 }
 902                 else if (!strncasecmp(buf, "from=", 4)) {
 903                         extract_token(from, buf, 1, '=', sizeof(from));
 904                 }
 905         }
 906
 907         if (!IsEmptyStr(relevant_partnum)) {
 908                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 909                 if (relevant_source != NULL) {
 910
 911                         cal = icalcomponent_new_from_string(relevant_source);
 912                         if (cal != NULL) {
 913
 914                                 ical_dezonify(cal);
 915
 916                                 /** Simple components of desired type */
 917                                 if (icalcomponent_isa(cal) == which_kind) {
 918                                         callback(cal, msgnum, from, unread);
 919                                 }
 920
 921                                 /** Subcomponents of desired type */
 922                                 for (c = icalcomponent_get_first_component(cal,
 923                                                                            which_kind);
 924                                      (c != 0);
 925                                      c = icalcomponent_get_next_component(cal,
 926                                                                           which_kind)) {
 927                                         callback(c, msgnum, from, unread);
 928                                 }
 929                                 icalcomponent_free(cal);
 930                         }
 931                         free(relevant_source);
 932                 }
 933         }
 934         icalmemory_free_ring();
 935 }
 936
 937 /**
 938  * \brief display whole calendar
 939  * \param msgnum number of the mesage in our db
 940  */
 941 void display_calendar(long msgnum, int unread) {
 942         display_using_handler(msgnum, unread,
 943                               ICAL_VEVENT_COMPONENT,
 944                               display_individual_cal);
 945 }
 946
 947 /**
 948  * \brief display whole taksview
 949  * \param msgnum number of the mesage in our db
 950  */
 951 void display_task(long msgnum, int unread) {
 952         display_using_handler(msgnum, unread,
 953                               ICAL_VTODO_COMPONENT,
 954                               display_individual_cal);
 955 }
 956
 957 /**
 958  * \brief display the editor component for a task
 959  */
 960 void display_edit_task(void) {
 961         long msgnum = 0L;
 962
 963         /** Force change the room if we have to */
 964         if (havebstr("taskrm")) {
 965                 gotoroom((char *)bstr("taskrm"));
 966         }
 967
 968         msgnum = lbstr("msgnum");
 969         if (msgnum > 0L) {
 970                 /** existing task */
 971                 display_using_handler(msgnum, 0,
 972                                       ICAL_VTODO_COMPONENT,
 973                                       display_edit_individual_task);
 974         }
 975         else {
 976                 /** new task */
 977                 display_edit_individual_task(NULL, 0L, "", 0);
 978         }
 979 }
 980
 981 /**
 982  *\brief save an edited task
 983  */
 984 void save_task(void) {
 985         long msgnum = 0L;
 986
 987         msgnum = lbstr("msgnum");
 988         if (msgnum > 0L) {
 989                 display_using_handler(msgnum, 0,
 990                                       ICAL_VTODO_COMPONENT,
 991                                       save_individual_task);
 992         }
 993         else {
 994                 save_individual_task(NULL, 0L, "", 0);
 995         }
 996 }
 997
 998 /**
 999  * \brief display the editor component for an event
1000  */
1001 void display_edit_event(void) {
1002         long msgnum = 0L;
1003
1004         msgnum = lbstr("msgnum");
1005         if (msgnum > 0L) {
1006                 /* existing event */
1007                 display_using_handler(msgnum, 0,
1008                                       ICAL_VEVENT_COMPONENT,
1009                                       display_edit_individual_event);
1010         }
1011         else {
1012                 /* new event */
1013                 display_edit_individual_event(NULL, 0L, "", 0);
1014         }
1015 }
1016
1017 /**
1018  * \brief save an edited event
1019  */
1020 void save_event(void) {
1021         long msgnum = 0L;
1022
1023         msgnum = lbstr("msgnum");
1024
1025         if (msgnum > 0L) {
1026                 display_using_handler(msgnum, 0,
1027                                       ICAL_VEVENT_COMPONENT,
1028                                       save_individual_event);
1029         }
1030         else {
1031                 save_individual_event(NULL, 0L, "", 0);
1032         }
1033 }
1034
1035
1036
1037
1038
1039 /**
1040  * \brief freebusy display (for client software)
1041  * \param req dunno. ?????
1042  */
1043 void do_freebusy(char *req) {
1044         char who[SIZ];
1045         char buf[SIZ];
1046         char *fb;
1047         int len;
1048
1049         extract_token(who, req, 1, ' ', sizeof who);
1050         if (!strncasecmp(who, "/freebusy/", 10)) {
1051                 strcpy(who, &who[10]);
1052         }
1053         unescape_input(who);
1054
1055         len = strlen(who);
1056         if ( (!strcasecmp(&who[len-4], ".vcf"))
1057              || (!strcasecmp(&who[len-4], ".ifb"))
1058              || (!strcasecmp(&who[len-4], ".vfb")) ) {
1059                 who[len-4] = 0;
1060         }
1061
1062         lprintf(9, "freebusy requested for <%s>\n", who);
1063         serv_printf("ICAL freebusy|%s", who);
1064         serv_getln(buf, sizeof buf);
1065
1066         if (buf[0] != '1') {
1067                 wprintf("HTTP/1.1 404 %s\n", &buf[4]);
1068                 output_headers(0, 0, 0, 0, 0, 0);
1069                 wprintf("Content-Type: text/plain\r\n");
1070                 wprintf("\r\n");
1071                 wprintf("%s\n", &buf[4]);
1072                 return;
1073         }
1074
1075         fb = read_server_text();
1076         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
1077         free(fb);
1078 }
1079
1080
1081
1082
1083
1084 void
1085 InitModule_CALENDAR
1086 (void)
1087 {
1088         WebcitAddUrlHandler(HKEY("display_edit_task"), display_edit_task, 0);
1089         WebcitAddUrlHandler(HKEY("save_task"), save_task, 0);
1090         WebcitAddUrlHandler(HKEY("display_edit_event"), display_edit_event, 0);
1091         WebcitAddUrlHandler(HKEY("save_event"), save_event, 0);
1092         WebcitAddUrlHandler(HKEY("respond_to_request"), respond_to_request, 0);
1093         WebcitAddUrlHandler(HKEY("handle_rsvp"), handle_rsvp, 0);
1094 }