webcit/calendar.c

   1 /*
   2  * $Id$
   3  */
   4 /**
   5  * \defgroup calav Functions which handle calendar objects and their processing/display.
   6  * \ingroup Calendaring
   7  */
   8 /* @{ */
   9
  10 #include "webcit.h"
  11 #include "webserver.h"
  12
  13 #ifndef WEBCIT_WITH_CALENDAR_SERVICE
  14
  15 /**
  16  * \brief get around non existing types
  17  * Handler stubs for builds with no calendar library available
  18  * \param part_source dummy pointer to the source
  19  * \param msgnum number of the mesage in the db
  20  * \param cal_partnum number of the calendar part
  21  */
  22 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
  23
  24         wprintf(_("<I>This message contains calendaring/scheduling information,"
  25                 " but support for calendars is not available on this "
  26                 "particular system.  Please ask your system administrator to "
  27                 "install a new version of the Citadel web service with "
  28                 "calendaring enabled.</I><br />\n")
  29         );
  30
  31 }
  32
  33 /**
  34  * \brief say we can't display calendar items
  35  * \param msgnum number of the mesage in our db
  36  */
  37 void display_calendar(long msgnum) {
  38         wprintf(_("<i>"
  39                 "Cannot display calendar item.  You are seeing this error "
  40                 "because your WebCit service has not been installed with "
  41                 "calendar support.  Please contact your system administrator."
  42                 "</i><br />\n"));
  43 }
  44
  45 /**
  46  * \brief say we can't display task items
  47  * \param msgnum number of the mesage in our db
  48  */
  49 void display_task(long msgnum) {
  50         wprintf(_("<i>"
  51                 "Cannot display to-do item.  You are seeing this error "
  52                 "because your WebCit service has not been installed with "
  53                 "calendar support.  Please contact your system administrator."
  54                 "</i><br />\n"));
  55 }
  56 /** ok, we have calendaring available */
  57 #else /* WEBCIT_WITH_CALENDAR_SERVICE */
  58
  59
  60 /******   End of handler stubs.  Everything below this line is real.   ******/
  61
  62
  63
  64
  65 /**
  66  * \brief Process a calendar object
  67  * ...at this point it's already been deserialized by cal_process_attachment()
  68  * \param cal the calendar object
  69  * \param recursion_level call stack depth ??????
  70  * \param msgnum number of the mesage in our db
  71  * \param cal_partnum of the calendar object ????
  72  */
  73 void cal_process_object(icalcomponent *cal,
  74                         int recursion_level,
  75                         long msgnum,
  76                         char *cal_partnum
  77 ) {
  78         icalcomponent *c;
  79         icalproperty *method = NULL;
  80         icalproperty_method the_method = ICAL_METHOD_NONE;
  81         icalproperty *p;
  82         struct icaltimetype t;
  83         time_t tt;
  84         char buf[256];
  85         char conflict_name[256];
  86         char conflict_message[256];
  87         int is_update = 0;
  88         char divname[32];
  89         static int divcount = 0;
  90
  91         sprintf(divname, "rsvp%04x", ++divcount);
  92
  93         /** Leading HTML for the display of this object */
  94         if (recursion_level == 0) {
  95                 wprintf("<div class=\"mimepart\">\n");
  96         }
  97
  98         /** Look for a method */
  99         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
 100
 101         /** See what we need to do with this */
 102         if (method != NULL) {
 103                 the_method = icalproperty_get_method(method);
 104                 char *title;
 105
 106                 wprintf("<div id=\"%s_title\">", divname);
 107                 wprintf("<img src=\"static/calarea_48x.gif\">");
 108                 wprintf("<span>");
 109                 switch(the_method) {
 110                     case ICAL_METHOD_REQUEST:
 111                         title = _("Meeting invitation");
 112                         break;
 113                     case ICAL_METHOD_REPLY:
 114                         title = _("Attendee's reply to your invitation");
 115                         break;
 116                     case ICAL_METHOD_PUBLISH:
 117                         title = _("Published event");
 118                         break;
 119                     default:
 120                         title = _("This is an unknown type of calendar item.");
 121                         break;
 122                 }
 123                 wprintf("</span>");
 124
 125                 wprintf("&nbsp;&nbsp;%s",title);
 126                 wprintf("</div>");
 127         }
 128
 129         wprintf("<dl>");
 130         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 131         if (p != NULL) {
 132                 wprintf("<dt>");
 133                 wprintf(_("Summary:"));
 134                 wprintf("</dt><dd>");
 135                 escputs((char *)icalproperty_get_comment(p));
 136                 wprintf("</dd>\n");
 137         }
 138
 139         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 140         if (p != NULL) {
 141                 wprintf("<dt>");
 142                 wprintf(_("Location:"));
 143                 wprintf("</dt><dd>");
 144                 escputs((char *)icalproperty_get_comment(p));
 145                 wprintf("</dd>\n");
 146         }
 147
 148         /**
 149          * Only show start/end times if we're actually looking at the VEVENT
 150          * component.  Otherwise it shows bogus dates for things like timezone.
 151          */
 152         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 153
 154                 p = icalcomponent_get_first_property(cal,
 155                                                 ICAL_DTSTART_PROPERTY);
 156                 if (p != NULL) {
 157                         t = icalproperty_get_dtstart(p);
 158
 159                         if (t.is_date) {
 160                                 struct tm d_tm;
 161                                 char d_str[32];
 162                                 memset(&d_tm, 0, sizeof d_tm);
 163                                 d_tm.tm_year = t.year - 1900;
 164                                 d_tm.tm_mon = t.month - 1;
 165                                 d_tm.tm_mday = t.day;
 166                                 wc_strftime(d_str, sizeof d_str, "%x", &d_tm);
 167                                 wprintf("<dt>");
 168                                 wprintf(_("Date:"));
 169                                 wprintf("</dt><dd>%s</dd>", d_str);
 170                         }
 171                         else {
 172                                 tt = icaltime_as_timet(t);
 173                                 fmt_date(buf, tt, 0);
 174                                 wprintf("<dt>");
 175                                 wprintf(_("Starting date/time:"));
 176                                 wprintf("</dt><dd>%s</dd>", buf);
 177                         }
 178                 }
 179
 180                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 181                 if (p != NULL) {
 182                         t = icalproperty_get_dtend(p);
 183                         tt = icaltime_as_timet(t);
 184                         fmt_date(buf, tt, 0);
 185                         wprintf("<dt>");
 186                         wprintf(_("Ending date/time:"));
 187                         wprintf("</dt><dd>%s</dd>", buf);
 188                 }
 189
 190         }
 191
 192         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 193         if (p != NULL) {
 194                 wprintf("<dt>");
 195                 wprintf(_("Description:"));
 196                 wprintf("</dt><dd>");
 197                 escputs((char *)icalproperty_get_comment(p));
 198                 wprintf("</dd>\n");
 199         }
 200
 201         /** If the component has attendees, iterate through them. */
 202         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 203                 wprintf("<dt>");
 204                 wprintf(_("Attendee:"));
 205                 wprintf("</dt><dd>");
 206                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
 207                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 208
 209                         /** screen name or email address */
 210                         strcpy(buf, &buf[7]);
 211                         striplt(buf);
 212                         escputs(buf);
 213                         wprintf(" ");
 214
 215                         /** participant status */
 216                         partstat_as_string(buf, p);
 217                         escputs(buf);
 218                 }
 219                 wprintf("</dd>\n");
 220         }
 221
 222         /** If the component has subcomponents, recurse through them. */
 223         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 224             (c != 0);
 225             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 226                 /* Recursively process subcomponent */
 227                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 228         }
 229
 230         /** If this is a REQUEST, display conflicts and buttons */
 231         if (the_method == ICAL_METHOD_REQUEST) {
 232
 233                 /* Check for conflicts */
 234                 lprintf(9, "Checking server calendar for conflicts...\n");
 235                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 236                 serv_getln(buf, sizeof buf);
 237                 if (buf[0] == '1') {
 238                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 239                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 240                                 is_update = extract_int(buf, 4);
 241
 242                                 if (is_update) {
 243                                         snprintf(conflict_message, sizeof conflict_message,
 244                                                 _("This is an update of '%s' which is already in your calendar."), conflict_name);
 245                                 }
 246                                 else {
 247                                         snprintf(conflict_message, sizeof conflict_message,
 248                                                 _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
 249                                 }
 250
 251                                 wprintf("<dt>%s",
 252                                         (is_update ?
 253                                                 _("Update:") :
 254                                                 _("CONFLICT:")
 255                                         )
 256                                 );
 257                                 wprintf("</dt><dd>");
 258                                 escputs(conflict_message);
 259                                 wprintf("</dd>\n");
 260                         }
 261                 }
 262                 lprintf(9, "...done.\n");
 263
 264                 wprintf("</dl>");
 265
 266                 /** Display the Accept/Decline buttons */
 267                 wprintf("<p id=\"%s_question\" class=\"buttons\">"
 268                         "%s "
 269                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Accept');\">%s</a>"
 270                         "<span> | </span>"
 271                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Tentative');\">%s</a>"
 272                         "<span> | </span>"
 273                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Decline');\">%s</a>"
 274                         "</p>\n",
 275                         divname,
 276                         _("How would you like to respond to this invitation?"),
 277                         divname, divname, msgnum, cal_partnum, _("Accept"),
 278                         divname, divname, msgnum, cal_partnum, _("Tentative"),
 279                         divname, divname, msgnum, cal_partnum, _("Decline")
 280                 );
 281
 282         }
 283
 284         /** If this is a REPLY, display update button */
 285         if (the_method == ICAL_METHOD_REPLY) {
 286
 287                 /** \todo  In the future, if we want to validate this object before \
 288                  * continuing, we can do it this way:
 289                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 290                 serv_getln(buf, sizeof buf);
 291                 }
 292                  ***********/
 293
 294                 /** Display the update buttons */
 295                 wprintf("<p id=\"%s_question\" class=\"buttons\">"
 296                         "%s"
 297                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Update');\">%s</a>"
 298                         "<span> | </span>"
 299                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Ignore');\">%s</a>"
 300                         "</p>\n",
 301                         divname,
 302                         _("Click <i>Update</i> to accept this reply and update your calendar."),
 303                         divname, divname, msgnum, cal_partnum, _("Update"),
 304                         divname, divname, msgnum, cal_partnum, _("Ignore")
 305                 );
 306
 307         }
 308
 309         /** Trailing HTML for the display of this object */
 310         if (recursion_level == 0) {
 311                 wprintf("<p>&nbsp;</p></div>\n");
 312         }
 313 }
 314
 315
 316 /**
 317  * \brief process calendar mail atachment
 318  * Deserialize a calendar object in a message so it can be processed.
 319  * (This is the main entry point for these things)
 320  * \param part_source the part of the message we want to parse
 321  * \param msgnum number of the mesage in our db
 322  * \param cal_partnum the number of the calendar item
 323  */
 324 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 325         icalcomponent *cal;
 326
 327         cal = icalcomponent_new_from_string(part_source);
 328
 329         if (cal == NULL) {
 330                 wprintf(_("There was an error parsing this calendar item."));
 331                 wprintf("<br />\n");
 332                 return;
 333         }
 334
 335         ical_dezonify(cal);
 336         cal_process_object(cal, 0, msgnum, cal_partnum);
 337
 338         /* Free the memory we obtained from libical's constructor */
 339         icalcomponent_free(cal);
 340 }
 341
 342
 343
 344
 345 /**
 346  * \brief accept/decline meeting
 347  * Respond to a meeting request
 348  */
 349 void respond_to_request(void) {
 350         char buf[1024];
 351
 352         begin_ajax_response();
 353
 354         serv_printf("ICAL respond|%s|%s|%s|",
 355                 bstr("msgnum"),
 356                 bstr("cal_partnum"),
 357                 bstr("sc")
 358         );
 359         serv_getln(buf, sizeof buf);
 360
 361         if (buf[0] == '2') {
 362                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 363                 if (!strcasecmp(bstr("sc"), "accept")) {
 364                         wprintf(_("You have accepted this meeting invitation.  "
 365                                 "It has been entered into your calendar.")
 366                         );
 367                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 368                         wprintf(_("You have tentatively accepted this meeting invitation.  "
 369                                 "It has been 'pencilled in' to your calendar.")
 370                         );
 371                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 372                         wprintf(_("You have declined this meeting invitation.  "
 373                                 "It has <b>not</b> been entered into your calendar.")
 374                         );
 375                 }
 376                 wprintf(" ");
 377                 wprintf(_("A reply has been sent to the meeting organizer."));
 378                 wprintf("</span>");
 379         } else {
 380                 wprintf("<img align=\"center\" src=\"static/error.gif\"><span>");
 381                 wprintf("%s\n", &buf[4]);
 382                 wprintf("</span>");
 383         }
 384
 385         end_ajax_response();
 386 }
 387
 388
 389
 390 /**
 391  * \brief Handle an incoming RSVP
 392  */
 393 void handle_rsvp(void) {
 394         char buf[1024];
 395
 396         begin_ajax_response();
 397
 398         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 399                 bstr("msgnum"),
 400                 bstr("cal_partnum"),
 401                 bstr("sc")
 402         );
 403         serv_getln(buf, sizeof buf);
 404
 405         if (buf[0] == '2') {
 406                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 407                 if (!strcasecmp(bstr("sc"), "update")) {
 408                         wprintf(_("Your calendar has been updated to reflect this RSVP."));
 409                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 410                         wprintf(_("You have chosen to ignore this RSVP. "
 411                                 "Your calendar has <b>not</b> been updated.")
 412                         );
 413                 }
 414                 wprintf("</span>");
 415         } else {
 416                 wprintf("<img src=\"static/error.gif\"><span> %s\n", &buf[4]);
 417                 wprintf("</span>");
 418         }
 419
 420         end_ajax_response();
 421
 422 }
 423
 424
 425
 426 /*@}*/
 427 /*-----------------------------------------------------------------------**/
 428
 429
 430
 431 /**
 432  * \defgroup MsgDisplayHandlers Display handlers for message reading
 433  * \ingroup Calendaring
 434  */
 435
 436 /*@{*/
 437
 438
 439
 440 /**
 441  * \brief get items, keep them.
 442  * If we're reading calendar items, just store them for now.  We have to
 443  * sort and re-output them later when we draw the calendar.
 444  * \param cal Our calendar to process
 445  * \param msgnum number of the mesage in our db
 446  */
 447 void display_individual_cal(icalcomponent *cal, long msgnum) {
 448
 449         WC->num_cal += 1;
 450
 451         WC->disp_cal = realloc(WC->disp_cal,
 452                         (sizeof(struct disp_cal) * WC->num_cal) );
 453         WC->disp_cal[WC->num_cal - 1].cal = icalcomponent_new_clone(cal);
 454
 455         WC->disp_cal[WC->num_cal - 1].cal_msgnum = msgnum;
 456 }
 457
 458
 459
 460 /*
 461  * \brief edit a task
 462  * Display a task by itself (for editing)
 463  * \param supplied_vtodo the todo item we want to edit
 464  * \param msgnum number of the mesage in our db
 465  */
 466 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 467         icalcomponent *vtodo;
 468         icalproperty *p;
 469         struct icaltimetype t;
 470         time_t now;
 471         int created_new_vtodo = 0;
 472
 473         now = time(NULL);
 474
 475         if (supplied_vtodo != NULL) {
 476                 vtodo = supplied_vtodo;
 477
 478                 /**
 479                  * If we're looking at a fully encapsulated VCALENDAR
 480                  * rather than a VTODO component, attempt to use the first
 481                  * relevant VTODO subcomponent.  If there is none, the
 482                  * NULL returned by icalcomponent_get_first_component() will
 483                  * tell the next iteration of this function to create a
 484                  * new one.
 485                  */
 486                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 487                         display_edit_individual_task(
 488                                 icalcomponent_get_first_component(
 489                                         vtodo, ICAL_VTODO_COMPONENT
 490                                 ), msgnum
 491                         );
 492                         return;
 493                 }
 494         }
 495         else {
 496                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 497                 created_new_vtodo = 1;
 498         }
 499
 500         output_headers(1, 1, 2, 0, 0, 0);
 501         wprintf("<div id=\"banner\">\n");
 502         wprintf("<img src=\"static/taskmanag_48x.gif\">");
 503         wprintf("<h1>");
 504         wprintf(_("Edit task"));
 505         wprintf("</h1>");
 506         wprintf("</div>\n");
 507
 508         wprintf("<div id=\"content\" class=\"service\">\n");
 509
 510         wprintf("<div class=\"fix_scrollbar_bug\">"
 511                 "<table class=\"calendar_background\"><tr><td>");
 512
 513         wprintf("<FORM METHOD=\"POST\" action=\"save_task\">\n");
 514         wprintf("<input type=\"hidden\" name=\"nonce\" value=\"%ld\">\n", WC->nonce);
 515         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 516                 msgnum);
 517
 518         wprintf("<TABLE border=0>\n");
 519
 520         wprintf("<TR><TD>");
 521         wprintf(_("Summary:"));
 522         wprintf("</TD><TD>"
 523                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 524                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 525         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 526         if (p != NULL) {
 527                 escputs((char *)icalproperty_get_comment(p));
 528         }
 529         wprintf("\"></TD></TR>\n");
 530
 531         wprintf("<TR><TD>");
 532         wprintf(_("Start date:"));
 533         wprintf("</TD><TD>");
 534         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 535         if (p != NULL) {
 536                 t = icalproperty_get_dtstart(p);
 537         }
 538         else {
 539                 t = icaltime_from_timet(now, 0);
 540         }
 541         display_icaltimetype_as_webform(&t, "dtstart");
 542         wprintf("</TD></TR>\n");
 543
 544         wprintf("<TR><TD>");
 545         wprintf(_("Due date:"));
 546         wprintf("</TD><TD>");
 547         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 548         if (p != NULL) {
 549                 t = icalproperty_get_due(p);
 550         }
 551         else {
 552                 t = icaltime_from_timet(now, 0);
 553         }
 554         display_icaltimetype_as_webform(&t, "due");
 555         wprintf("</TD></TR>\n");
 556         wprintf("<TR><TD>");
 557         wprintf(_("Description:"));
 558         wprintf("</TD><TD>");
 559         wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
 560                 "ROWS=10 COLS=80 WIDTH=80>\n"
 561         );
 562         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 563         if (p != NULL) {
 564                 escputs((char *)icalproperty_get_comment(p));
 565         }
 566         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 567
 568         wprintf("<CENTER>"
 569                 "<INPUT TYPE=\"submit\" NAME=\"save_button\" VALUE=\"%s\">"
 570                 "&nbsp;&nbsp;"
 571                 "<INPUT TYPE=\"submit\" NAME=\"delete_button\" VALUE=\"%s\">\n"
 572                 "&nbsp;&nbsp;"
 573                 "<INPUT TYPE=\"submit\" NAME=\"cancel_button\" VALUE=\"%s\">\n"
 574                 "</CENTER>\n",
 575                 _("Save"),
 576                 _("Delete"),
 577                 _("Cancel")
 578         );
 579
 580         wprintf("</FORM>\n");
 581
 582         wprintf("</td></tr></table></div>\n");
 583         wDumpContent(1);
 584
 585         if (created_new_vtodo) {
 586                 icalcomponent_free(vtodo);
 587         }
 588 }
 589
 590 /*
 591  * \brief Save an edited task
 592  * \param supplied_vtodo the task to save
 593  * \param msgnum number of the mesage in our db
 594  */
 595 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 596         char buf[SIZ];
 597         int delete_existing = 0;
 598         icalproperty *prop;
 599         icalcomponent *vtodo, *encaps;
 600         int created_new_vtodo = 0;
 601         int i;
 602         int sequence = 0;
 603         struct icaltimetype t;
 604
 605         if (supplied_vtodo != NULL) {
 606                 vtodo = supplied_vtodo;
 607                 /**
 608                  * If we're looking at a fully encapsulated VCALENDAR
 609                  * rather than a VTODO component, attempt to use the first
 610                  * relevant VTODO subcomponent.  If there is none, the
 611                  * NULL returned by icalcomponent_get_first_component() will
 612                  * tell the next iteration of this function to create a
 613                  * new one.
 614                  */
 615                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 616                         save_individual_task(
 617                                 icalcomponent_get_first_component(
 618                                         vtodo, ICAL_VTODO_COMPONENT
 619                                 ), msgnum
 620                         );
 621                         return;
 622                 }
 623         }
 624         else {
 625                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 626                 created_new_vtodo = 1;
 627         }
 628
 629         if (!IsEmptyStr(bstr("save_button"))) {
 630
 631                 /** Replace values in the component with ones from the form */
 632
 633                 while (prop = icalcomponent_get_first_property(vtodo,
 634                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 635                         icalcomponent_remove_property(vtodo, prop);
 636                         icalproperty_free(prop);
 637                 }
 638                 icalcomponent_add_property(vtodo,
 639                         icalproperty_new_summary(bstr("summary")));
 640
 641                 while (prop = icalcomponent_get_first_property(vtodo,
 642                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 643                         icalcomponent_remove_property(vtodo, prop);
 644                         icalproperty_free(prop);
 645                 }
 646                 icalcomponent_add_property(vtodo,
 647                         icalproperty_new_description(bstr("description")));
 648
 649                 while (prop = icalcomponent_get_first_property(vtodo,
 650                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 651                         icalcomponent_remove_property(vtodo, prop);
 652                         icalproperty_free(prop);
 653                 }
 654                 icaltime_from_webform(&t, "dtstart");
 655                 icalcomponent_add_property(vtodo,
 656                         icalproperty_new_dtstart(t)
 657                 );
 658
 659                 while (prop = icalcomponent_get_first_property(vtodo,
 660                       ICAL_DUE_PROPERTY), prop != NULL) {
 661                         icalcomponent_remove_property(vtodo, prop);
 662                         icalproperty_free(prop);
 663                 }
 664                 icaltime_from_webform(&t, "due");
 665                 icalcomponent_add_property(vtodo,
 666                         icalproperty_new_due(t)
 667                 );
 668
 669                 /** Give this task a UID if it doesn't have one. */
 670                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 671                 if (icalcomponent_get_first_property(vtodo,
 672                    ICAL_UID_PROPERTY) == NULL) {
 673                         generate_uuid(buf);
 674                         icalcomponent_add_property(vtodo,
 675                                 icalproperty_new_uid(buf)
 676                         );
 677                 }
 678
 679                 /** Increment the sequence ID */
 680                 lprintf(9, "Increment the sequence ID\n");
 681                 while (prop = icalcomponent_get_first_property(vtodo,
 682                       ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 683                         i = icalproperty_get_sequence(prop);
 684                         lprintf(9, "Sequence was %d\n", i);
 685                         if (i > sequence) sequence = i;
 686                         icalcomponent_remove_property(vtodo, prop);
 687                         icalproperty_free(prop);
 688                 }
 689                 ++sequence;
 690                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 691                 icalcomponent_add_property(vtodo,
 692                         icalproperty_new_sequence(sequence)
 693                 );
 694
 695                 /**
 696                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 697                  * for two reasons: one, it's easier to just free the whole thing
 698                  * when we're done instead of unbundling, but more importantly, we
 699                  * can't encapsulate something that may already be encapsulated
 700                  * somewhere else.
 701                  */
 702                 lprintf(9, "Encapsulating into a full VCALENDAR component\n");
 703                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 704
 705                 /* Serialize it and save it to the message base */
 706                 serv_puts("ENT0 1|||4");
 707                 serv_getln(buf, sizeof buf);
 708                 if (buf[0] == '4') {
 709                         serv_puts("Content-type: text/calendar");
 710                         serv_puts("");
 711                         serv_puts(icalcomponent_as_ical_string(encaps));
 712                         serv_puts("000");
 713
 714                         /**
 715                          * Probably not necessary; the server will see the UID
 716                          * of the object and delete the old one anyway, but
 717                          * just in case...
 718                          */
 719                         delete_existing = 1;
 720                 }
 721                 icalcomponent_free(encaps);
 722         }
 723
 724         /**
 725          * If the user clicked 'Delete' then explicitly delete the message.
 726          */
 727         if (!IsEmptyStr(bstr("delete_button"))) {
 728                 delete_existing = 1;
 729         }
 730
 731         if ( (delete_existing) && (msgnum > 0L) ) {
 732                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 733                 serv_getln(buf, sizeof buf);
 734         }
 735
 736         if (created_new_vtodo) {
 737                 icalcomponent_free(vtodo);
 738         }
 739
 740         /** Go back to the task list */
 741         readloop("readfwd");
 742 }
 743
 744
 745
 746 /**
 747  * \brief generic item handler
 748  * Code common to all display handlers.  Given a message number and a MIME
 749  * type, we load the message and hunt for that MIME type.  If found, we load
 750  * the relevant part, deserialize it into a libical component, filter it for
 751  * the requested object type, and feed it to the specified handler.
 752  * \param mimetype mimetyp of our object
 753  * \param which_kind sort of ical type
 754  * \param msgnum number of the mesage in our db
 755  * \param callback a funcion \todo
 756  *
 757  */
 758 void display_using_handler(long msgnum,
 759                         char *mimetype,
 760                         icalcomponent_kind which_kind,
 761                         void (*callback)(icalcomponent *, long)
 762         ) {
 763         char buf[1024];
 764         char mime_partnum[256];
 765         char mime_filename[256];
 766         char mime_content_type[256];
 767         char mime_disposition[256];
 768         int mime_length;
 769         char relevant_partnum[256];
 770         char *relevant_source = NULL;
 771         icalcomponent *cal, *c;
 772
 773         sprintf(buf, "MSG0 %ld|0", msgnum);     /* unfortunately we need the mime headers */
 774         serv_puts(buf);
 775         serv_getln(buf, sizeof buf);
 776         if (buf[0] != '1') return;
 777
 778         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 779                 if (!strncasecmp(buf, "part=", 5)) {
 780                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 781                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 782                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 783                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 784                         mime_length = extract_int(&buf[5], 5);
 785
 786                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 787                                 strcpy(relevant_partnum, mime_partnum);
 788                         }
 789
 790                 }
 791         }
 792
 793         if (!IsEmptyStr(relevant_partnum)) {
 794                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 795                 if (relevant_source != NULL) {
 796
 797                         cal = icalcomponent_new_from_string(relevant_source);
 798                         if (cal != NULL) {
 799
 800                                 ical_dezonify(cal);
 801
 802                                 /** Simple components of desired type */
 803                                 if (icalcomponent_isa(cal) == which_kind) {
 804                                         callback(cal, msgnum);
 805                                 }
 806
 807                                 /** Subcomponents of desired type */
 808                                 for (c = icalcomponent_get_first_component(cal,
 809                                     which_kind);
 810                                     (c != 0);
 811                                     c = icalcomponent_get_next_component(cal,
 812                                     which_kind)) {
 813                                         callback(c, msgnum);
 814                                 }
 815                                 icalcomponent_free(cal);
 816                         }
 817                         free(relevant_source);
 818                 }
 819         }
 820
 821 }
 822
 823 /**
 824  * \brief display whole calendar
 825  * \param msgnum number of the mesage in our db
 826  */
 827 void display_calendar(long msgnum) {
 828         display_using_handler(msgnum, "text/calendar",
 829                                 ICAL_VEVENT_COMPONENT,
 830                                 display_individual_cal);
 831 }
 832
 833 /**
 834  * \brief display whole taksview
 835  * \param msgnum number of the mesage in our db
 836  */
 837 void display_task(long msgnum) {
 838         display_using_handler(msgnum, "text/calendar",
 839                                 ICAL_VTODO_COMPONENT,
 840                                 display_individual_cal);
 841 }
 842
 843 /**
 844  * \brief display the editor component for a task
 845  */
 846 void display_edit_task(void) {
 847         long msgnum = 0L;
 848
 849         /** Force change the room if we have to */
 850         if (!IsEmptyStr(bstr("taskrm"))) {
 851                 gotoroom(bstr("taskrm"));
 852         }
 853
 854         msgnum = atol(bstr("msgnum"));
 855         if (msgnum > 0L) {
 856                 /** existing task */
 857                 display_using_handler(msgnum, "text/calendar",
 858                                 ICAL_VTODO_COMPONENT,
 859                                 display_edit_individual_task);
 860         }
 861         else {
 862                 /** new task */
 863                 display_edit_individual_task(NULL, 0L);
 864         }
 865 }
 866
 867 /**
 868  *\brief save an edited task
 869  */
 870 void save_task(void) {
 871         long msgnum = 0L;
 872
 873         msgnum = atol(bstr("msgnum"));
 874         if (msgnum > 0L) {
 875                 display_using_handler(msgnum, "text/calendar",
 876                                 ICAL_VTODO_COMPONENT,
 877                                 save_individual_task);
 878         }
 879         else {
 880                 save_individual_task(NULL, 0L);
 881         }
 882 }
 883
 884 /**
 885  * \brief display the editor component for an event
 886  */
 887 void display_edit_event(void) {
 888         long msgnum = 0L;
 889
 890         msgnum = atol(bstr("msgnum"));
 891         if (msgnum > 0L) {
 892                 /* existing event */
 893                 display_using_handler(msgnum, "text/calendar",
 894                                 ICAL_VEVENT_COMPONENT,
 895                                 display_edit_individual_event);
 896         }
 897         else {
 898                 /* new event */
 899                 display_edit_individual_event(NULL, 0L);
 900         }
 901 }
 902
 903 /**
 904  * \brief save an edited event
 905  */
 906 void save_event(void) {
 907         long msgnum = 0L;
 908
 909         msgnum = atol(bstr("msgnum"));
 910
 911         if (msgnum > 0L) {
 912                 display_using_handler(msgnum, "text/calendar",
 913                                 ICAL_VEVENT_COMPONENT,
 914                                 save_individual_event);
 915         }
 916         else {
 917                 save_individual_event(NULL, 0L);
 918         }
 919 }
 920
 921
 922
 923
 924
 925 /**
 926  * \brief freebusy display (for client software)
 927  * \param req dunno. ?????
 928  */
 929 void do_freebusy(char *req) {
 930         char who[SIZ];
 931         char buf[SIZ];
 932         char *fb;
 933         int len;
 934
 935         extract_token(who, req, 1, ' ', sizeof who);
 936         if (!strncasecmp(who, "/freebusy/", 10)) {
 937                 strcpy(who, &who[10]);
 938         }
 939         unescape_input(who);
 940
 941         len = strlen(who);
 942         if ( (!strcasecmp(&who[len-4], ".vcf"))
 943            || (!strcasecmp(&who[len-4], ".ifb"))
 944            || (!strcasecmp(&who[len-4], ".vfb")) ) {
 945                 who[len-4] = 0;
 946         }
 947
 948         lprintf(9, "freebusy requested for <%s>\n", who);
 949         serv_printf("ICAL freebusy|%s", who);
 950         serv_getln(buf, sizeof buf);
 951
 952         if (buf[0] != '1') {
 953                 wprintf("HTTP/1.1 404 %s\n", &buf[4]);
 954                 output_headers(0, 0, 0, 0, 0, 0);
 955                 wprintf("Content-Type: text/plain\r\n");
 956                 wprintf("\r\n");
 957                 wprintf("%s\n", &buf[4]);
 958                 return;
 959         }
 960
 961         fb = read_server_text();
 962         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
 963         free(fb);
 964 }
 965
 966
 967
 968 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */
 969
 970
 971 /*@}*/