webcit/calendar.c

   1 /*
   2  * $Id$
   3  *
   4  * Functions which handle calendar objects and their processing/display.
   5  *
   6  */
   7
   8 #include <ctype.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <sys/types.h>
  15 #include <sys/wait.h>
  16 #include <sys/socket.h>
  17 #include <limits.h>
  18 #include <netinet/in.h>
  19 #include <netdb.h>
  20 #include <string.h>
  21 #include <pwd.h>
  22 #include <errno.h>
  23 #include <stdarg.h>
  24 #include <pthread.h>
  25 #include <signal.h>
  26 #include <time.h>
  27 #include "webcit.h"
  28 #include "webserver.h"
  29
  30 #ifndef HAVE_ICAL_H
  31
  32 /*
  33  * Handler stubs for builds with no calendar library available
  34  */
  35 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
  36
  37         wprintf("<I>This message contains calendaring/scheduling information,"
  38                 " but support for calendars is not available on this "
  39                 "particular system.  Please ask your system administrator to "
  40                 "install a new version of the Citadel web service with "
  41                 "calendaring enabled.</I><BR>\n"
  42         );
  43
  44 }
  45
  46 void display_calendar(long msgnum) {
  47         wprintf("<i>"
  48                 "Cannot display calendar item.  You are seeing this error "
  49                 "because your WebCit service has not been installed with "
  50                 "calendar support.  Please contact your system administrator."
  51                 "</i><br>\n");
  52 }
  53
  54 void display_task(long msgnum) {
  55         wprintf("<i>"
  56                 "Cannot display to-do item.  You are seeing this error "
  57                 "because your WebCit service has not been installed with "
  58                 "calendar support.  Please contact your system administrator."
  59                 "</i><br>\n");
  60 }
  61
  62 #else /* HAVE_ICAL_H */
  63
  64
  65 /******   End of handler stubs.  Everything below this line is real.   ******/
  66
  67
  68
  69
  70 /*
  71  * Process a calendar object
  72  * ...at this point it's already been deserialized by cal_process_attachment()
  73  */
  74 void cal_process_object(icalcomponent *cal,
  75                         int recursion_level,
  76                         long msgnum,
  77                         char *cal_partnum
  78 ) {
  79         icalcomponent *c;
  80         icalproperty *method = NULL;
  81         icalproperty_method the_method = ICAL_METHOD_NONE;
  82         icalproperty *p;
  83         struct icaltimetype t;
  84         time_t tt;
  85         char buf[SIZ];
  86         char conflict_name[SIZ];
  87         int is_update = 0;
  88
  89         /* Leading HTML for the display of this object */
  90         if (recursion_level == 0) {
  91                 wprintf("<CENTER><TABLE border=0>\n");
  92         }
  93
  94         /* Look for a method */
  95         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  96
  97         /* See what we need to do with this */
  98         if (method != NULL) {
  99                 the_method = icalproperty_get_method(method);
 100                 switch(the_method) {
 101                     case ICAL_METHOD_REQUEST:
 102                         wprintf("<TR><TD COLSPAN=2>\n"
 103                                 "<IMG ALIGN=CENTER "
 104                                 "SRC=\"/static/vcalendar.gif\">"
 105                                 "&nbsp;&nbsp;"
 106                                 "<B>Meeting invitation</B>
 107                                 </TD></TR>\n"
 108                         );
 109                         break;
 110                     case ICAL_METHOD_PUBLISH:
 111                         wprintf("<TR><TD COLSPAN=2>\n"
 112                                 "<IMG ALIGN=CENTER "
 113                                 "SRC=\"/static/vcalendar.gif\">"
 114                                 "&nbsp;&nbsp;"
 115                                 "<B>Published event</B>
 116                                 </TD></TR>\n"
 117                         );
 118                         break;
 119                     default:
 120                         wprintf("<TR><TD COLSPAN=2>"
 121                                 "I don't know what to do with this.</TD></TR>"
 122                                 "\n");
 123                         break;
 124                 }
 125         }
 126
 127         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 128         if (p != NULL) {
 129                 wprintf("<TR><TD><B>Summary:</B></TD><TD>");
 130                 escputs((char *)icalproperty_get_comment(p));
 131                 wprintf("</TD></TR>\n");
 132         }
 133
 134         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 135         if (p != NULL) {
 136                 wprintf("<TR><TD><B>Location:</B></TD><TD>");
 137                 escputs((char *)icalproperty_get_comment(p));
 138                 wprintf("</TD></TR>\n");
 139         }
 140
 141         /*
 142          * Only show start/end times if we're actually looking at the VEVENT
 143          * component.  Otherwise it shows bogus dates for things like timezone.
 144          */
 145         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 146
 147                 p = icalcomponent_get_first_property(cal,
 148                                                 ICAL_DTSTART_PROPERTY);
 149                 if (p != NULL) {
 150                         t = icalproperty_get_dtstart(p);
 151
 152                         if (t.is_date) {
 153                                 wprintf("<TR><TD><B>Date:"
 154                                         "</B></TD><TD>"
 155                                         "%s %d, %d</TD></TR>",
 156                                         months[t.month - 1],
 157                                         t.day, t.year
 158                                 );
 159                         }
 160                         else {
 161                                 tt = icaltime_as_timet(t);
 162                                 fmt_date(buf, tt);
 163                                 wprintf("<TR><TD><B>Starting date/time:"
 164                                         "</B></TD><TD>"
 165                                         "%s</TD></TR>", buf
 166                                 );
 167                         }
 168                 }
 169
 170                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 171                 if (p != NULL) {
 172                         t = icalproperty_get_dtend(p);
 173                         tt = icaltime_as_timet(t);
 174                         fmt_date(buf, tt);
 175                         wprintf("<TR><TD><B>Ending date/time:</B></TD><TD>"
 176                                 "%s</TD></TR>", buf
 177                         );
 178                 }
 179
 180         }
 181
 182         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 183         if (p != NULL) {
 184                 wprintf("<TR><TD><B>Description:</B></TD><TD>");
 185                 escputs((char *)icalproperty_get_comment(p));
 186                 wprintf("</TD></TR>\n");
 187         }
 188
 189         /* If the component has subcomponents, recurse through them. */
 190         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 191             (c != 0);
 192             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 193                 /* Recursively process subcomponent */
 194                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 195         }
 196
 197         /* If this is a REQUEST, display conflicts and buttons */
 198         if (the_method == ICAL_METHOD_REQUEST) {
 199
 200                 /* Check for conflicts */
 201                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 202                 serv_gets(buf);
 203                 if (buf[0] == '1') {
 204                         while (serv_gets(buf), strcmp(buf, "000")) {
 205                                 extract(conflict_name, buf, 3);
 206                                 is_update = extract_int(buf, 4);
 207                                 wprintf("<TR><TD><B><I>%s</I></B></TD>"
 208                                         "<TD>"
 209                                         "%s "
 210                                         "<I>&quot;",
 211
 212                                         (is_update ?
 213                                                 "Update:" :
 214                                                 "CONFLICT:"
 215                                         ),
 216
 217                                         (is_update ?
 218                                                 "This is an update of" :
 219                                                 "This event would conflict with"
 220                                         )
 221
 222                                 );
 223                                 escputs(conflict_name);
 224                                 wprintf("&quot;</I> "
 225                                         "which is already in your calendar."
 226                                         "</TD></TR>\n");
 227                         }
 228                 }
 229
 230                 /* Display the Accept/Decline buttons */
 231                 wprintf("<TR><TD COLSPAN=2>"
 232                         "<FORM METHOD=\"GET\" "
 233                         "ACTION=\"/respond_to_request\">\n"
 234                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 235                                 "VALUE=\"Accept\">\n"
 236                         "&nbsp;&nbsp;"
 237                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 238                                 "VALUE=\"Tentative\">\n"
 239                         "&nbsp;&nbsp;"
 240                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 241                                 "VALUE=\"Decline\">\n"
 242                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 243                                 "VALUE=\"%ld\">"
 244                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 245                                 "VALUE=\"%s\">"
 246                         "</FORM>"
 247                         "</TD></TR>\n",
 248                         msgnum, cal_partnum
 249                 );
 250
 251         }
 252
 253         /* Trailing HTML for the display of this object */
 254         if (recursion_level == 0) {
 255
 256                 wprintf("</TR></TABLE></CENTER>\n");
 257         }
 258 }
 259
 260
 261 /*
 262  * Deserialize a calendar object in a message so it can be processed.
 263  * (This is the main entry point for these things)
 264  */
 265 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 266         icalcomponent *cal;
 267
 268         cal = icalcomponent_new_from_string(part_source);
 269
 270         if (cal == NULL) {
 271                 wprintf("Error parsing calendar object: %s<BR>\n",
 272                         icalerror_strerror(icalerrno));
 273                 return;
 274         }
 275
 276         cal_process_object(cal, 0, msgnum, cal_partnum);
 277
 278         /* Free the memory we obtained from libical's constructor */
 279         icalcomponent_free(cal);
 280 }
 281
 282
 283
 284
 285 /*
 286  * Respond to a meeting request
 287  */
 288 void respond_to_request(void) {
 289         char buf[SIZ];
 290
 291         output_headers(3);
 292
 293         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 294                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 295                 "<B>Respond to meeting request</B>"
 296                 "</FONT></TD></TR></TABLE><BR>\n"
 297         );
 298
 299         serv_printf("ICAL respond|%s|%s|%s|",
 300                 bstr("msgnum"),
 301                 bstr("cal_partnum"),
 302                 bstr("sc")
 303         );
 304         serv_gets(buf);
 305
 306         if (buf[0] == '2') {
 307                 wprintf("<TABLE BORDER=0><TR><TD>"
 308                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 309                         "</TD><TD>"
 310                 );
 311                 if (!strcasecmp(bstr("sc"), "accept")) {
 312                         wprintf("You have accepted this meeting invitation.  "
 313                                 "It has been entered into your calendar, "
 314                         );
 315                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 316                         wprintf("You have tentatively accepted this meeting invitation.  "
 317                                 "It has been 'pencilled in' to your calendar, "
 318                         );
 319                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 320                         wprintf("You have declined this meeting invitation.  "
 321                                 "It has <b>not</b> been entered into your calendar, "
 322                         );
 323                 }
 324                 wprintf("and a reply has been sent to the meeting organizer."
 325                         "</TD></TR></TABLE>\n"
 326                 );
 327         } else {
 328                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 329                         "%s\n", &buf[4]);
 330         }
 331
 332         wprintf("<A HREF=\"/dotskip?room=");
 333         urlescputs(WC->wc_roomname);
 334         wprintf("\">Return to messages</A><BR>\n");
 335
 336         wDumpContent(1);
 337 }
 338
 339
 340
 341
 342 /*****************************************************************************/
 343
 344
 345
 346 /*
 347  * Display handlers for message reading
 348  */
 349
 350
 351
 352 /*
 353  * If we're reading calendar items, just store them for now.  We have to
 354  * sort and re-output them later when we draw the calendar.
 355  */
 356 void display_individual_cal(icalcomponent *cal, long msgnum) {
 357
 358         WC->num_cal += 1;
 359
 360         WC->disp_cal = realloc(WC->disp_cal,
 361                         (sizeof(icalcomponent *) * WC->num_cal) );
 362         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 363
 364         WC->cal_msgnum = realloc(WC->cal_msgnum,
 365                         (sizeof(long) * WC->num_cal) );
 366         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 367 }
 368
 369
 370
 371 /*
 372  * Display a task in the task list
 373  */
 374 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 375         icalproperty *p;
 376
 377         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 378         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 379         if (p != NULL) {
 380                 escputs((char *)icalproperty_get_comment(p));
 381         }
 382         wprintf("</A>\n");
 383 }
 384
 385
 386 /*
 387  * Display a task by itself (for editing)
 388  */
 389 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 390         icalcomponent *vtodo;
 391         icalproperty *p;
 392         struct icaltimetype t;
 393         time_t now;
 394         int created_new_vtodo = 0;
 395
 396         now = time(NULL);
 397
 398         if (supplied_vtodo != NULL) {
 399                 vtodo = supplied_vtodo;
 400         }
 401         else {
 402                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 403                 created_new_vtodo = 1;
 404         }
 405
 406         output_headers(3);
 407         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 408                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 409                 "<B>Edit task</B>"
 410                 "</FONT></TD></TR></TABLE><BR>\n"
 411         );
 412
 413         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 414         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 415                 msgnum);
 416
 417         wprintf("Summary: "
 418                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 419                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 420         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 421         if (p != NULL) {
 422                 escputs((char *)icalproperty_get_comment(p));
 423         }
 424         wprintf("\"><BR>\n");
 425
 426         wprintf("Start date: ");
 427         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 428         if (p != NULL) {
 429                 t = icalproperty_get_dtstart(p);
 430         }
 431         else {
 432                 t = icaltime_from_timet(now, 0);
 433         }
 434         display_icaltimetype_as_webform(&t, "dtstart");
 435         wprintf("<BR>\n");
 436
 437         wprintf("Due date: ");
 438         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 439         if (p != NULL) {
 440                 t = icalproperty_get_due(p);
 441         }
 442         else {
 443                 t = icaltime_from_timet(now, 0);
 444         }
 445         display_icaltimetype_as_webform(&t, "due");
 446         wprintf("<BR>\n");
 447
 448         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 449                 "ROWS=10 COLS=80 WIDTH=80>\n"
 450         );
 451         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 452         if (p != NULL) {
 453                 escputs((char *)icalproperty_get_comment(p));
 454         }
 455         wprintf("</TEXTAREA><BR>\n");
 456
 457         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 458                 "&nbsp;&nbsp;"
 459                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 460                 "&nbsp;&nbsp;"
 461                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 462                 "</CENTER>\n"
 463         );
 464
 465         wprintf("</FORM>\n");
 466
 467         wDumpContent(1);
 468
 469         if (created_new_vtodo) {
 470                 icalcomponent_free(vtodo);
 471         }
 472 }
 473
 474 /*
 475  * Save an edited task
 476  */
 477 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 478         char buf[SIZ];
 479         int delete_existing = 0;
 480         icalproperty *prop;
 481         icalcomponent *vtodo;
 482         int created_new_vtodo = 0;
 483
 484         if (supplied_vtodo != NULL) {
 485                 vtodo = supplied_vtodo;
 486         }
 487         else {
 488                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 489                 created_new_vtodo = 1;
 490         }
 491
 492         if (!strcasecmp(bstr("sc"), "Save")) {
 493
 494                 /* Replace values in the component with ones from the form */
 495
 496                 while (prop = icalcomponent_get_first_property(vtodo,
 497                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 498                         icalcomponent_remove_property(vtodo, prop);
 499                         icalproperty_free(prop);
 500                 }
 501                 icalcomponent_add_property(vtodo,
 502                         icalproperty_new_summary(bstr("summary")));
 503
 504                 while (prop = icalcomponent_get_first_property(vtodo,
 505                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 506                         icalcomponent_remove_property(vtodo, prop);
 507                         icalproperty_free(prop);
 508                 }
 509                 icalcomponent_add_property(vtodo,
 510                         icalproperty_new_description(bstr("description")));
 511
 512                 while (prop = icalcomponent_get_first_property(vtodo,
 513                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 514                         icalcomponent_remove_property(vtodo, prop);
 515                         icalproperty_free(prop);
 516                 }
 517                 icalcomponent_add_property(vtodo,
 518                         icalproperty_new_dtstart(
 519                                 icaltime_from_webform("dtstart")
 520                         )
 521                 );
 522
 523                 while (prop = icalcomponent_get_first_property(vtodo,
 524                       ICAL_DUE_PROPERTY), prop != NULL) {
 525                         icalcomponent_remove_property(vtodo, prop);
 526                         icalproperty_free(prop);
 527                 }
 528                 icalcomponent_add_property(vtodo,
 529                         icalproperty_new_due(
 530                                 icaltime_from_webform("due")
 531                         )
 532                 );
 533
 534                 /* Serialize it and save it to the message base */
 535                 serv_puts("ENT0 1|||4");
 536                 serv_gets(buf);
 537                 if (buf[0] == '4') {
 538                         serv_puts("Content-type: text/calendar");
 539                         serv_puts("");
 540                         serv_puts(icalcomponent_as_ical_string(vtodo));
 541                         serv_puts("000");
 542
 543                         /* Probably not necessary; the server will see the UID
 544                          * of the object and delete the old one anyway, but
 545                          * just in case...
 546                          */
 547                         delete_existing = 1;
 548                 }
 549         }
 550
 551         /*
 552          * If the user clicked 'Delete' then explicitly delete the message.
 553          */
 554         if (!strcasecmp(bstr("sc"), "Delete")) {
 555                 delete_existing = 1;
 556         }
 557
 558         if ( (delete_existing) && (msgnum > 0L) ) {
 559                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 560                 serv_gets(buf);
 561         }
 562
 563         if (created_new_vtodo) {
 564                 icalcomponent_free(vtodo);
 565         }
 566
 567         /* Go back to the task list */
 568         readloop("readfwd");
 569 }
 570
 571
 572
 573 /*
 574  * Code common to all display handlers.  Given a message number and a MIME
 575  * type, we load the message and hunt for that MIME type.  If found, we load
 576  * the relevant part, deserialize it into a libical component, filter it for
 577  * the requested object type, and feed it to the specified handler.
 578  */
 579 void display_using_handler(long msgnum,
 580                         char *mimetype,
 581                         icalcomponent_kind which_kind,
 582                         void (*callback)(icalcomponent *, long)
 583         ) {
 584         char buf[SIZ];
 585         char mime_partnum[SIZ];
 586         char mime_filename[SIZ];
 587         char mime_content_type[SIZ];
 588         char mime_disposition[SIZ];
 589         int mime_length;
 590         char relevant_partnum[SIZ];
 591         char *relevant_source = NULL;
 592         icalcomponent *cal, *c;
 593
 594         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 595         serv_puts(buf);
 596         serv_gets(buf);
 597         if (buf[0] != '1') return;
 598
 599         while (serv_gets(buf), strcmp(buf, "000")) {
 600                 if (!strncasecmp(buf, "part=", 5)) {
 601                         extract(mime_filename, &buf[5], 1);
 602                         extract(mime_partnum, &buf[5], 2);
 603                         extract(mime_disposition, &buf[5], 3);
 604                         extract(mime_content_type, &buf[5], 4);
 605                         mime_length = extract_int(&buf[5], 5);
 606
 607                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 608                                 strcpy(relevant_partnum, mime_partnum);
 609                         }
 610
 611                 }
 612         }
 613
 614         if (strlen(relevant_partnum) > 0) {
 615                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 616                 if (relevant_source != NULL) {
 617
 618                         cal = icalcomponent_new_from_string(relevant_source);
 619                         if (cal != NULL) {
 620
 621                                 /* Simple components of desired type */
 622                                 if (icalcomponent_isa(cal) == which_kind) {
 623                                         callback(cal, msgnum);
 624                                 }
 625
 626                                 /* Subcomponents of desired type */
 627                                 for (c = icalcomponent_get_first_component(cal,
 628                                     which_kind);
 629                                     (c != 0);
 630                                     c = icalcomponent_get_next_component(cal,
 631                                     which_kind)) {
 632                                         callback(c, msgnum);
 633                                 }
 634                                 icalcomponent_free(cal);
 635                         }
 636                         free(relevant_source);
 637                 }
 638         }
 639
 640 }
 641
 642 void display_calendar(long msgnum) {
 643         display_using_handler(msgnum, "text/calendar",
 644                                 ICAL_VEVENT_COMPONENT,
 645                                 display_individual_cal);
 646 }
 647
 648 void display_task(long msgnum) {
 649         display_using_handler(msgnum, "text/calendar",
 650                                 ICAL_VTODO_COMPONENT,
 651                                 display_individual_task);
 652 }
 653
 654 void display_edit_task(void) {
 655         long msgnum = 0L;
 656
 657         msgnum = atol(bstr("msgnum"));
 658         if (msgnum > 0L) {
 659                 /* existing task */
 660                 display_using_handler(msgnum, "text/calendar",
 661                                 ICAL_VTODO_COMPONENT,
 662                                 display_edit_individual_task);
 663         }
 664         else {
 665                 /* new task */
 666                 display_edit_individual_task(NULL, 0L);
 667         }
 668 }
 669
 670 void save_task(void) {
 671         long msgnum = 0L;
 672
 673         msgnum = atol(bstr("msgnum"));
 674         if (msgnum > 0L) {
 675                 display_using_handler(msgnum, "text/calendar",
 676                                 ICAL_VTODO_COMPONENT,
 677                                 save_individual_task);
 678         }
 679         else {
 680                 save_individual_task(NULL, 0L);
 681         }
 682 }
 683
 684 void display_edit_event(void) {
 685         long msgnum = 0L;
 686
 687         msgnum = atol(bstr("msgnum"));
 688         if (msgnum > 0L) {
 689                 /* existing event */
 690                 display_using_handler(msgnum, "text/calendar",
 691                                 ICAL_VEVENT_COMPONENT,
 692                                 display_edit_individual_event);
 693         }
 694         else {
 695                 /* new event */
 696                 display_edit_individual_event(NULL, 0L);
 697         }
 698 }
 699
 700 void save_event(void) {
 701         long msgnum = 0L;
 702
 703         msgnum = atol(bstr("msgnum"));
 704
 705         if (msgnum > 0L) {
 706                 display_using_handler(msgnum, "text/calendar",
 707                                 ICAL_VEVENT_COMPONENT,
 708                                 save_individual_event);
 709         }
 710         else {
 711                 save_individual_event(NULL, 0L);
 712         }
 713 }
 714
 715 #endif /* HAVE_ICAL_H */