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("<h2><span>");
 107                 switch(the_method) {
 108                     case ICAL_METHOD_REQUEST:
 109                         title = _("Meeting invitation");
 110                         break;
 111                     case ICAL_METHOD_REPLY:
 112                         title = _("Attendee's reply to your invitation");
 113                         break;
 114                     case ICAL_METHOD_PUBLISH:
 115                         title = _("Published event");
 116                         break;
 117                     default:
 118                         title = _("This is an unknown type of calendar item.");
 119                         break;
 120                 }
 121                 wprintf("</span>");
 122
 123                 wprintf("<div id=\"%s_title\">", divname);
 124                 wprintf("<img src=\"static/calarea_48x.gif\">"
 125                         "&nbsp;&nbsp;%s",
 126                         title
 127                 );
 128                 wprintf("</h2>");
 129         }
 130
 131         wprintf("<dl>");
 132         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 133         if (p != NULL) {
 134                 wprintf("<dt>");
 135                 wprintf(_("Summary:"));
 136                 wprintf("</dt><dd>");
 137                 escputs((char *)icalproperty_get_comment(p));
 138                 wprintf("</dd>\n");
 139         }
 140
 141         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 142         if (p != NULL) {
 143                 wprintf("<dt>");
 144                 wprintf(_("Location:"));
 145                 wprintf("</dt><dd>");
 146                 escputs((char *)icalproperty_get_comment(p));
 147                 wprintf("</dd>\n");
 148         }
 149
 150         /**
 151          * Only show start/end times if we're actually looking at the VEVENT
 152          * component.  Otherwise it shows bogus dates for things like timezone.
 153          */
 154         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 155
 156                 p = icalcomponent_get_first_property(cal,
 157                                                 ICAL_DTSTART_PROPERTY);
 158                 if (p != NULL) {
 159                         t = icalproperty_get_dtstart(p);
 160
 161                         if (t.is_date) {
 162                                 struct tm d_tm;
 163                                 char d_str[32];
 164                                 memset(&d_tm, 0, sizeof d_tm);
 165                                 d_tm.tm_year = t.year - 1900;
 166                                 d_tm.tm_mon = t.month - 1;
 167                                 d_tm.tm_mday = t.day;
 168                                 wc_strftime(d_str, sizeof d_str, "%x", &d_tm);
 169                                 wprintf("<dt>");
 170                                 wprintf(_("Date:"));
 171                                 wprintf("</dt><dd>%s</dd>", d_str);
 172                         }
 173                         else {
 174                                 tt = icaltime_as_timet(t);
 175                                 fmt_date(buf, tt, 0);
 176                                 wprintf("<dt>");
 177                                 wprintf(_("Starting date/time:"));
 178                                 wprintf("</dt><dd>%s</dd>", buf);
 179                         }
 180                 }
 181
 182                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 183                 if (p != NULL) {
 184                         t = icalproperty_get_dtend(p);
 185                         tt = icaltime_as_timet(t);
 186                         fmt_date(buf, tt, 0);
 187                         wprintf("<dt>");
 188                         wprintf(_("Ending date/time:"));
 189                         wprintf("</dt><dd>%s</dd>", buf);
 190                 }
 191
 192         }
 193
 194         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 195         if (p != NULL) {
 196                 wprintf("<dt>");
 197                 wprintf(_("Description:"));
 198                 wprintf("</dt><dd>");
 199                 escputs((char *)icalproperty_get_comment(p));
 200                 wprintf("</dd>\n");
 201         }
 202
 203         /** If the component has attendees, iterate through them. */
 204         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 205                 wprintf("<dt>");
 206                 wprintf(_("Attendee:"));
 207                 wprintf("</dt><dd>");
 208                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
 209                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 210
 211                         /** screen name or email address */
 212                         strcpy(buf, &buf[7]);
 213                         striplt(buf);
 214                         escputs(buf);
 215                         wprintf(" ");
 216
 217                         /** participant status */
 218                         partstat_as_string(buf, p);
 219                         escputs(buf);
 220                 }
 221                 wprintf("</dd>\n");
 222         }
 223
 224         /** If the component has subcomponents, recurse through them. */
 225         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 226             (c != 0);
 227             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 228                 /* Recursively process subcomponent */
 229                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 230         }
 231
 232         /** If this is a REQUEST, display conflicts and buttons */
 233         if (the_method == ICAL_METHOD_REQUEST) {
 234
 235                 /* Check for conflicts */
 236                 lprintf(9, "Checking server calendar for conflicts...\n");
 237                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 238                 serv_getln(buf, sizeof buf);
 239                 if (buf[0] == '1') {
 240                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 241                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 242                                 is_update = extract_int(buf, 4);
 243
 244                                 if (is_update) {
 245                                         snprintf(conflict_message, sizeof conflict_message,
 246                                                 _("This is an update of '%s' which is already in your calendar."), conflict_name);
 247                                 }
 248                                 else {
 249                                         snprintf(conflict_message, sizeof conflict_message,
 250                                                 _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
 251                                 }
 252
 253                                 wprintf("<dt>%s",
 254                                         (is_update ?
 255                                                 _("Update:") :
 256                                                 _("CONFLICT:")
 257                                         )
 258                                 );
 259                                 escputs(conflict_message);
 260                                 wprintf("</dt>\n");
 261                         }
 262                 }
 263                 lprintf(9, "...done.\n");
 264
 265                 wprintf("</dl>");
 266
 267                 /** Display the Accept/Decline buttons */
 268                 wprintf("<div id=\"%s_question\">"
 269                         "%s "
 270                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Accept');\">%s</a>"
 271                         " | "
 272                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Tentative');\">%s</a>"
 273                         " | "
 274                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Decline');\">%s</a>"
 275                         "</div>\n",
 276                         divname,
 277                         _("How would you like to respond to this invitation?"),
 278                         divname, divname, msgnum, cal_partnum, _("Accept"),
 279                         divname, divname, msgnum, cal_partnum, _("Tentative"),
 280                         divname, divname, msgnum, cal_partnum, _("Decline")
 281                 );
 282
 283         }
 284
 285         /** If this is a REPLY, display update button */
 286         if (the_method == ICAL_METHOD_REPLY) {
 287
 288                 /** \todo  In the future, if we want to validate this object before \
 289                  * continuing, we can do it this way:
 290                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 291                 serv_getln(buf, sizeof buf);
 292                 }
 293                  ***********/
 294
 295                 /** Display the update buttons */
 296                 wprintf("<div id=\"%s_question\">"
 297                         "%s"
 298                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Update');\">%s</a>"
 299                         " | "
 300                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Ignore');\">%s</a>"
 301                         "</div>\n",
 302                         divname,
 303                         _("Click <i>Update</i> to accept this reply and update your calendar."),
 304                         divname, divname, msgnum, cal_partnum, _("Update"),
 305                         divname, divname, msgnum, cal_partnum, _("Ignore")
 306                 );
 307
 308         }
 309
 310         /** Trailing HTML for the display of this object */
 311         if (recursion_level == 0) {
 312                 wprintf("</div>\n");
 313         }
 314 }
 315
 316
 317 /**
 318  * \brief process calendar mail atachment
 319  * Deserialize a calendar object in a message so it can be processed.
 320  * (This is the main entry point for these things)
 321  * \param part_source the part of the message we want to parse
 322  * \param msgnum number of the mesage in our db
 323  * \param cal_partnum the number of the calendar item
 324  */
 325 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 326         icalcomponent *cal;
 327
 328         cal = icalcomponent_new_from_string(part_source);
 329
 330         if (cal == NULL) {
 331                 wprintf(_("There was an error parsing this calendar item."));
 332                 wprintf("<br />\n");
 333                 return;
 334         }
 335
 336         ical_dezonify(cal);
 337         cal_process_object(cal, 0, msgnum, cal_partnum);
 338
 339         /* Free the memory we obtained from libical's constructor */
 340         icalcomponent_free(cal);
 341 }
 342
 343
 344
 345
 346 /**
 347  * \brief accept/decline meeting
 348  * Respond to a meeting request
 349  */
 350 void respond_to_request(void) {
 351         char buf[1024];
 352
 353         begin_ajax_response();
 354
 355         serv_printf("ICAL respond|%s|%s|%s|",
 356                 bstr("msgnum"),
 357                 bstr("cal_partnum"),
 358                 bstr("sc")
 359         );
 360         serv_getln(buf, sizeof buf);
 361
 362         if (buf[0] == '2') {
 363                 wprintf("<table border=0 cellpadding=0><tr><td>");
 364                 wprintf("<td><img align=\"center\" src=\"static/calarea_48x.gif\"></td><td><b><i>");
 365                 if (!strcasecmp(bstr("sc"), "accept")) {
 366                         wprintf(_("You have accepted this meeting invitation.  "
 367                                 "It has been entered into your calendar.")
 368                         );
 369                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 370                         wprintf(_("You have tentatively accepted this meeting invitation.  "
 371                                 "It has been 'pencilled in' to your calendar.")
 372                         );
 373                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 374                         wprintf(_("You have declined this meeting invitation.  "
 375                                 "It has <b>not</b> been entered into your calendar.")
 376                         );
 377                 }
 378                 wprintf(" ");
 379                 wprintf(_("A reply has been sent to the meeting organizer."));
 380                 wprintf("</i></b></td></tr></table>");
 381         } else {
 382                 wprintf("<img align=\"center\" src=\"static/error.gif\">&nbsp;<b><i>");
 383                 wprintf("%s\n", &buf[4]);
 384         }
 385
 386         end_ajax_response();
 387 }
 388
 389
 390
 391 /**
 392  * \brief Handle an incoming RSVP
 393  */
 394 void handle_rsvp(void) {
 395         char buf[1024];
 396
 397         begin_ajax_response();
 398
 399         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 400                 bstr("msgnum"),
 401                 bstr("cal_partnum"),
 402                 bstr("sc")
 403         );
 404         serv_getln(buf, sizeof buf);
 405
 406         if (buf[0] == '2') {
 407                 wprintf("<table border=0 cellpadding=0><tr><td>");
 408                 wprintf("<td><img align=\"center\" src=\"static/calarea_48x.gif\"></td><td><b><i>");
 409                 if (!strcasecmp(bstr("sc"), "update")) {
 410                         wprintf(_("Your calendar has been updated to reflect this RSVP."));
 411                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 412                         wprintf(_("You have chosen to ignore this RSVP. "
 413                                 "Your calendar has <b>not</b> been updated.")
 414                         );
 415                 }
 416                 wprintf("</i></b></td></tr></table>");
 417         } else {
 418                 wprintf("<img src=\"static/error.gif\" align=center> %s\n", &buf[4]);
 419         }
 420
 421         end_ajax_response();
 422
 423 }
 424
 425
 426
 427 /*@}*/
 428 /*-----------------------------------------------------------------------**/
 429
 430
 431
 432 /**
 433  * \defgroup MsgDisplayHandlers Display handlers for message reading
 434  * \ingroup Calendaring
 435  */
 436
 437 /*@{*/
 438
 439
 440
 441 /**
 442  * \brief get items, keep them.
 443  * If we're reading calendar items, just store them for now.  We have to
 444  * sort and re-output them later when we draw the calendar.
 445  * \param cal Our calendar to process
 446  * \param msgnum number of the mesage in our db
 447  */
 448 void display_individual_cal(icalcomponent *cal, long msgnum) {
 449
 450         WC->num_cal += 1;
 451
 452         WC->disp_cal = realloc(WC->disp_cal,
 453                         (sizeof(struct disp_cal) * WC->num_cal) );
 454         WC->disp_cal[WC->num_cal - 1].cal = icalcomponent_new_clone(cal);
 455
 456         WC->disp_cal[WC->num_cal - 1].cal_msgnum = msgnum;
 457 }
 458
 459
 460
 461 /*
 462  * \brief edit a task
 463  * Display a task by itself (for editing)
 464  * \param supplied_vtodo the todo item we want to edit
 465  * \param msgnum number of the mesage in our db
 466  */
 467 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 468         icalcomponent *vtodo;
 469         icalproperty *p;
 470         struct icaltimetype t;
 471         time_t now;
 472         int created_new_vtodo = 0;
 473
 474         now = time(NULL);
 475
 476         if (supplied_vtodo != NULL) {
 477                 vtodo = supplied_vtodo;
 478
 479                 /**
 480                  * If we're looking at a fully encapsulated VCALENDAR
 481                  * rather than a VTODO component, attempt to use the first
 482                  * relevant VTODO subcomponent.  If there is none, the
 483                  * NULL returned by icalcomponent_get_first_component() will
 484                  * tell the next iteration of this function to create a
 485                  * new one.
 486                  */
 487                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 488                         display_edit_individual_task(
 489                                 icalcomponent_get_first_component(
 490                                         vtodo, ICAL_VTODO_COMPONENT
 491                                 ), msgnum
 492                         );
 493                         return;
 494                 }
 495         }
 496         else {
 497                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 498                 created_new_vtodo = 1;
 499         }
 500
 501         output_headers(1, 1, 2, 0, 0, 0);
 502         wprintf("<div id=\"banner\">\n"
 503                 "<TABLE class=\"calendar_banner\"><TR>"
 504                 "<TD><img src=\"static/taskmanag_48x.gif\"></TD>"
 505                 "<td><SPAN CLASS=\"titlebar\">");
 506         wprintf(_("Edit task"));
 507         wprintf("</SPAN>"
 508                 "</TD></TR></TABLE>\n"
 509                 "</div>\n<div id=\"content\">\n"
 510         );
 511
 512         wprintf("<div class=\"fix_scrollbar_bug\">"
 513                 "<table class=\"calendar_background\"><tr><td>");
 514
 515         wprintf("<FORM METHOD=\"POST\" action=\"save_task\">\n");
 516         wprintf("<input type=\"hidden\" name=\"nonce\" value=\"%ld\">\n", WC->nonce);
 517         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 518                 msgnum);
 519
 520         wprintf("<TABLE border=0>\n");
 521
 522         wprintf("<TR><TD>");
 523         wprintf(_("Summary:"));
 524         wprintf("</TD><TD>"
 525                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 526                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 527         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 528         if (p != NULL) {
 529                 escputs((char *)icalproperty_get_comment(p));
 530         }
 531         wprintf("\"></TD></TR>\n");
 532
 533         wprintf("<TR><TD>");
 534         wprintf(_("Start date:"));
 535         wprintf("</TD><TD>");
 536         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 537         if (p != NULL) {
 538                 t = icalproperty_get_dtstart(p);
 539         }
 540         else {
 541                 t = icaltime_from_timet(now, 0);
 542         }
 543         display_icaltimetype_as_webform(&t, "dtstart");
 544         wprintf("</TD></TR>\n");
 545
 546         wprintf("<TR><TD>");
 547         wprintf(_("Due date:"));
 548         wprintf("</TD><TD>");
 549         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 550         if (p != NULL) {
 551                 t = icalproperty_get_due(p);
 552         }
 553         else {
 554                 t = icaltime_from_timet(now, 0);
 555         }
 556         display_icaltimetype_as_webform(&t, "due");
 557         wprintf("</TD></TR>\n");
 558         wprintf("<TR><TD>");
 559         wprintf(_("Description:"));
 560         wprintf("</TD><TD>");
 561         wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
 562                 "ROWS=10 COLS=80 WIDTH=80>\n"
 563         );
 564         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 565         if (p != NULL) {
 566                 escputs((char *)icalproperty_get_comment(p));
 567         }
 568         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 569
 570         wprintf("<CENTER>"
 571                 "<INPUT TYPE=\"submit\" NAME=\"save_button\" VALUE=\"%s\">"
 572                 "&nbsp;&nbsp;"
 573                 "<INPUT TYPE=\"submit\" NAME=\"delete_button\" VALUE=\"%s\">\n"
 574                 "&nbsp;&nbsp;"
 575                 "<INPUT TYPE=\"submit\" NAME=\"cancel_button\" VALUE=\"%s\">\n"
 576                 "</CENTER>\n",
 577                 _("Save"),
 578                 _("Delete"),
 579                 _("Cancel")
 580         );
 581
 582         wprintf("</FORM>\n");
 583
 584         wprintf("</td></tr></table></div>\n");
 585         wDumpContent(1);
 586
 587         if (created_new_vtodo) {
 588                 icalcomponent_free(vtodo);
 589         }
 590 }
 591
 592 /*
 593  * \brief Save an edited task
 594  * \param supplied_vtodo the task to save
 595  * \param msgnum number of the mesage in our db
 596  */
 597 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 598         char buf[SIZ];
 599         int delete_existing = 0;
 600         icalproperty *prop;
 601         icalcomponent *vtodo, *encaps;
 602         int created_new_vtodo = 0;
 603         int i;
 604         int sequence = 0;
 605         struct icaltimetype t;
 606
 607         if (supplied_vtodo != NULL) {
 608                 vtodo = supplied_vtodo;
 609                 /**
 610                  * If we're looking at a fully encapsulated VCALENDAR
 611                  * rather than a VTODO component, attempt to use the first
 612                  * relevant VTODO subcomponent.  If there is none, the
 613                  * NULL returned by icalcomponent_get_first_component() will
 614                  * tell the next iteration of this function to create a
 615                  * new one.
 616                  */
 617                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 618                         save_individual_task(
 619                                 icalcomponent_get_first_component(
 620                                         vtodo, ICAL_VTODO_COMPONENT
 621                                 ), msgnum
 622                         );
 623                         return;
 624                 }
 625         }
 626         else {
 627                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 628                 created_new_vtodo = 1;
 629         }
 630
 631         if (!IsEmptyStr(bstr("save_button"))) {
 632
 633                 /** Replace values in the component with ones from the form */
 634
 635                 while (prop = icalcomponent_get_first_property(vtodo,
 636                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 637                         icalcomponent_remove_property(vtodo, prop);
 638                         icalproperty_free(prop);
 639                 }
 640                 icalcomponent_add_property(vtodo,
 641                         icalproperty_new_summary(bstr("summary")));
 642
 643                 while (prop = icalcomponent_get_first_property(vtodo,
 644                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 645                         icalcomponent_remove_property(vtodo, prop);
 646                         icalproperty_free(prop);
 647                 }
 648                 icalcomponent_add_property(vtodo,
 649                         icalproperty_new_description(bstr("description")));
 650
 651                 while (prop = icalcomponent_get_first_property(vtodo,
 652                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 653                         icalcomponent_remove_property(vtodo, prop);
 654                         icalproperty_free(prop);
 655                 }
 656                 icaltime_from_webform(&t, "dtstart");
 657                 icalcomponent_add_property(vtodo,
 658                         icalproperty_new_dtstart(t)
 659                 );
 660
 661                 while (prop = icalcomponent_get_first_property(vtodo,
 662                       ICAL_DUE_PROPERTY), prop != NULL) {
 663                         icalcomponent_remove_property(vtodo, prop);
 664                         icalproperty_free(prop);
 665                 }
 666                 icaltime_from_webform(&t, "due");
 667                 icalcomponent_add_property(vtodo,
 668                         icalproperty_new_due(t)
 669                 );
 670
 671                 /** Give this task a UID if it doesn't have one. */
 672                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 673                 if (icalcomponent_get_first_property(vtodo,
 674                    ICAL_UID_PROPERTY) == NULL) {
 675                         generate_uuid(buf);
 676                         icalcomponent_add_property(vtodo,
 677                                 icalproperty_new_uid(buf)
 678                         );
 679                 }
 680
 681                 /** Increment the sequence ID */
 682                 lprintf(9, "Increment the sequence ID\n");
 683                 while (prop = icalcomponent_get_first_property(vtodo,
 684                       ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 685                         i = icalproperty_get_sequence(prop);
 686                         lprintf(9, "Sequence was %d\n", i);
 687                         if (i > sequence) sequence = i;
 688                         icalcomponent_remove_property(vtodo, prop);
 689                         icalproperty_free(prop);
 690                 }
 691                 ++sequence;
 692                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 693                 icalcomponent_add_property(vtodo,
 694                         icalproperty_new_sequence(sequence)
 695                 );
 696
 697                 /**
 698                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 699                  * for two reasons: one, it's easier to just free the whole thing
 700                  * when we're done instead of unbundling, but more importantly, we
 701                  * can't encapsulate something that may already be encapsulated
 702                  * somewhere else.
 703                  */
 704                 lprintf(9, "Encapsulating into a full VCALENDAR component\n");
 705                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 706
 707                 /* Serialize it and save it to the message base */
 708                 serv_puts("ENT0 1|||4");
 709                 serv_getln(buf, sizeof buf);
 710                 if (buf[0] == '4') {
 711                         serv_puts("Content-type: text/calendar");
 712                         serv_puts("");
 713                         serv_puts(icalcomponent_as_ical_string(encaps));
 714                         serv_puts("000");
 715
 716                         /**
 717                          * Probably not necessary; the server will see the UID
 718                          * of the object and delete the old one anyway, but
 719                          * just in case...
 720                          */
 721                         delete_existing = 1;
 722                 }
 723                 icalcomponent_free(encaps);
 724         }
 725
 726         /**
 727          * If the user clicked 'Delete' then explicitly delete the message.
 728          */
 729         if (!IsEmptyStr(bstr("delete_button"))) {
 730                 delete_existing = 1;
 731         }
 732
 733         if ( (delete_existing) && (msgnum > 0L) ) {
 734                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 735                 serv_getln(buf, sizeof buf);
 736         }
 737
 738         if (created_new_vtodo) {
 739                 icalcomponent_free(vtodo);
 740         }
 741
 742         /** Go back to the task list */
 743         readloop("readfwd");
 744 }
 745
 746
 747
 748 /**
 749  * \brief generic item handler
 750  * Code common to all display handlers.  Given a message number and a MIME
 751  * type, we load the message and hunt for that MIME type.  If found, we load
 752  * the relevant part, deserialize it into a libical component, filter it for
 753  * the requested object type, and feed it to the specified handler.
 754  * \param mimetype mimetyp of our object
 755  * \param which_kind sort of ical type
 756  * \param msgnum number of the mesage in our db
 757  * \param callback a funcion \todo
 758  *
 759  */
 760 void display_using_handler(long msgnum,
 761                         char *mimetype,
 762                         icalcomponent_kind which_kind,
 763                         void (*callback)(icalcomponent *, long)
 764         ) {
 765         char buf[1024];
 766         char mime_partnum[256];
 767         char mime_filename[256];
 768         char mime_content_type[256];
 769         char mime_disposition[256];
 770         int mime_length;
 771         char relevant_partnum[256];
 772         char *relevant_source = NULL;
 773         icalcomponent *cal, *c;
 774
 775         sprintf(buf, "MSG0 %ld|0", msgnum);     /* unfortunately we need the mime headers */
 776         serv_puts(buf);
 777         serv_getln(buf, sizeof buf);
 778         if (buf[0] != '1') return;
 779
 780         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 781                 if (!strncasecmp(buf, "part=", 5)) {
 782                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 783                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 784                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 785                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 786                         mime_length = extract_int(&buf[5], 5);
 787
 788                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 789                                 strcpy(relevant_partnum, mime_partnum);
 790                         }
 791
 792                 }
 793         }
 794
 795         if (!IsEmptyStr(relevant_partnum)) {
 796                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 797                 if (relevant_source != NULL) {
 798
 799                         cal = icalcomponent_new_from_string(relevant_source);
 800                         if (cal != NULL) {
 801
 802                                 ical_dezonify(cal);
 803
 804                                 /** Simple components of desired type */
 805                                 if (icalcomponent_isa(cal) == which_kind) {
 806                                         callback(cal, msgnum);
 807                                 }
 808
 809                                 /** Subcomponents of desired type */
 810                                 for (c = icalcomponent_get_first_component(cal,
 811                                     which_kind);
 812                                     (c != 0);
 813                                     c = icalcomponent_get_next_component(cal,
 814                                     which_kind)) {
 815                                         callback(c, msgnum);
 816                                 }
 817                                 icalcomponent_free(cal);
 818                         }
 819                         free(relevant_source);
 820                 }
 821         }
 822
 823 }
 824
 825 /**
 826  * \brief display whole calendar
 827  * \param msgnum number of the mesage in our db
 828  */
 829 void display_calendar(long msgnum) {
 830         display_using_handler(msgnum, "text/calendar",
 831                                 ICAL_VEVENT_COMPONENT,
 832                                 display_individual_cal);
 833 }
 834
 835 /**
 836  * \brief display whole taksview
 837  * \param msgnum number of the mesage in our db
 838  */
 839 void display_task(long msgnum) {
 840         display_using_handler(msgnum, "text/calendar",
 841                                 ICAL_VTODO_COMPONENT,
 842                                 display_individual_cal);
 843 }
 844
 845 /**
 846  * \brief display the editor component for a task
 847  */
 848 void display_edit_task(void) {
 849         long msgnum = 0L;
 850
 851         /** Force change the room if we have to */
 852         if (!IsEmptyStr(bstr("taskrm"))) {
 853                 gotoroom(bstr("taskrm"));
 854         }
 855
 856         msgnum = atol(bstr("msgnum"));
 857         if (msgnum > 0L) {
 858                 /** existing task */
 859                 display_using_handler(msgnum, "text/calendar",
 860                                 ICAL_VTODO_COMPONENT,
 861                                 display_edit_individual_task);
 862         }
 863         else {
 864                 /** new task */
 865                 display_edit_individual_task(NULL, 0L);
 866         }
 867 }
 868
 869 /**
 870  *\brief save an edited task
 871  */
 872 void save_task(void) {
 873         long msgnum = 0L;
 874
 875         msgnum = atol(bstr("msgnum"));
 876         if (msgnum > 0L) {
 877                 display_using_handler(msgnum, "text/calendar",
 878                                 ICAL_VTODO_COMPONENT,
 879                                 save_individual_task);
 880         }
 881         else {
 882                 save_individual_task(NULL, 0L);
 883         }
 884 }
 885
 886 /**
 887  * \brief display the editor component for an event
 888  */
 889 void display_edit_event(void) {
 890         long msgnum = 0L;
 891
 892         msgnum = atol(bstr("msgnum"));
 893         if (msgnum > 0L) {
 894                 /* existing event */
 895                 display_using_handler(msgnum, "text/calendar",
 896                                 ICAL_VEVENT_COMPONENT,
 897                                 display_edit_individual_event);
 898         }
 899         else {
 900                 /* new event */
 901                 display_edit_individual_event(NULL, 0L);
 902         }
 903 }
 904
 905 /**
 906  * \brief save an edited event
 907  */
 908 void save_event(void) {
 909         long msgnum = 0L;
 910
 911         msgnum = atol(bstr("msgnum"));
 912
 913         if (msgnum > 0L) {
 914                 display_using_handler(msgnum, "text/calendar",
 915                                 ICAL_VEVENT_COMPONENT,
 916                                 save_individual_event);
 917         }
 918         else {
 919                 save_individual_event(NULL, 0L);
 920         }
 921 }
 922
 923
 924
 925
 926
 927 /**
 928  * \brief freebusy display (for client software)
 929  * \param req dunno. ?????
 930  */
 931 void do_freebusy(char *req) {
 932         char who[SIZ];
 933         char buf[SIZ];
 934         char *fb;
 935         int len;
 936
 937         extract_token(who, req, 1, ' ', sizeof who);
 938         if (!strncasecmp(who, "/freebusy/", 10)) {
 939                 strcpy(who, &who[10]);
 940         }
 941         unescape_input(who);
 942
 943         len = strlen(who);
 944         if ( (!strcasecmp(&who[len-4], ".vcf"))
 945            || (!strcasecmp(&who[len-4], ".ifb"))
 946            || (!strcasecmp(&who[len-4], ".vfb")) ) {
 947                 who[len-4] = 0;
 948         }
 949
 950         lprintf(9, "freebusy requested for <%s>\n", who);
 951         serv_printf("ICAL freebusy|%s", who);
 952         serv_getln(buf, sizeof buf);
 953
 954         if (buf[0] != '1') {
 955                 wprintf("HTTP/1.1 404 %s\n", &buf[4]);
 956                 output_headers(0, 0, 0, 0, 0, 0);
 957                 wprintf("Content-Type: text/plain\r\n");
 958                 wprintf("\r\n");
 959                 wprintf("%s\n", &buf[4]);
 960                 return;
 961         }
 962
 963         fb = read_server_text();
 964         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
 965         free(fb);
 966 }
 967
 968
 969
 970 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */
 971
 972
 973 /*@}*/