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
  87         /* Leading HTML for the display of this object */
  88         if (recursion_level == 0) {
  89                 wprintf("<CENTER><TABLE border=0 cellpadding=5>\n");
  90         }
  91
  92         /* Look for a method */
  93         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  94
  95         /* See what we need to do with this */
  96         if (method != NULL) {
  97                 the_method = icalproperty_get_method(method);
  98                 switch(the_method) {
  99                     case ICAL_METHOD_REQUEST:
 100                         wprintf("<TR><TD COLSPAN=2>\n"
 101                                 "<IMG ALIGN=CENTER "
 102                                 "SRC=\"/static/vcalendar.gif\">"
 103                                 "&nbsp;&nbsp;"
 104                                 "<B>Meeting invitation</B>
 105                                 </TD></TR>\n"
 106                         );
 107                         break;
 108                     case ICAL_METHOD_PUBLISH:
 109                         wprintf("<TR><TD COLSPAN=2>\n"
 110                                 "<IMG ALIGN=CENTER "
 111                                 "SRC=\"/static/vcalendar.gif\">"
 112                                 "&nbsp;&nbsp;"
 113                                 "<B>Published event</B>
 114                                 </TD></TR>\n"
 115                         );
 116                         break;
 117                     default:
 118                         wprintf("<TR><TD COLSPAN=2>"
 119                                 "I don't know what to do with this.</TD></TR>"
 120                                 "\n");
 121                         break;
 122                 }
 123         }
 124
 125         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 126         if (p != NULL) {
 127                 wprintf("<TR><TD><B>Summary:</B></TD><TD>");
 128                 escputs((char *)icalproperty_get_comment(p));
 129                 wprintf("</TD></TR>\n");
 130         }
 131
 132         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 133         if (p != NULL) {
 134                 wprintf("<TR><TD><B>Location:</B></TD><TD>");
 135                 escputs((char *)icalproperty_get_comment(p));
 136                 wprintf("</TD></TR>\n");
 137         }
 138
 139         /*
 140          * Only show start/end times if we're actually looking at the VEVENT
 141          * component.  Otherwise it shows bogus dates for things like timezone.
 142          */
 143         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 144
 145                 p = icalcomponent_get_first_property(cal,
 146                                                 ICAL_DTSTART_PROPERTY);
 147                 if (p != NULL) {
 148                         t = icalproperty_get_dtstart(p);
 149                         tt = icaltime_as_timet(t);
 150                         fmt_date(buf, tt);
 151                         wprintf("<TR><TD><B>Starting date/time:</B></TD><TD>"
 152                                 "%s</TD></TR>", buf
 153                         );
 154                 }
 155
 156                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 157                 if (p != NULL) {
 158                         t = icalproperty_get_dtend(p);
 159                         tt = icaltime_as_timet(t);
 160                         fmt_date(buf, tt);
 161                         wprintf("<TR><TD><B>Ending date/time:</B></TD><TD>"
 162                                 "%s</TD></TR>", buf
 163                         );
 164                 }
 165
 166         }
 167
 168         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 169         if (p != NULL) {
 170                 wprintf("<TR><TD><B>Description:</B></TD><TD>");
 171                 escputs((char *)icalproperty_get_comment(p));
 172                 wprintf("</TD></TR>\n");
 173         }
 174
 175         /* If the component has subcomponents, recurse through them. */
 176         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 177             (c != 0);
 178             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 179                 /* Recursively process subcomponent */
 180                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 181         }
 182
 183         /* If this is a REQUEST, display the Accept/Decline buttons */
 184         if (the_method == ICAL_METHOD_REQUEST) {
 185                 wprintf("<TR><TD COLSPAN=2>"
 186                         "<FORM METHOD=\"GET\" "
 187                         "ACTION=\"/respond_to_request\">\n"
 188                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 189                                 "VALUE=\"Accept\">\n"
 190                         "&nbsp;&nbsp;"
 191                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 192                                 "VALUE=\"Tentative\">\n"
 193                         "&nbsp;&nbsp;"
 194                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 195                                 "VALUE=\"Decline\">\n"
 196                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 197                                 "VALUE=\"%ld\">"
 198                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 199                                 "VALUE=\"%s\">"
 200                         "</FORM>"
 201                         "</TD></TR>\n",
 202                         msgnum, cal_partnum
 203                 );
 204         }
 205
 206         /* Trailing HTML for the display of this object */
 207         if (recursion_level == 0) {
 208                 wprintf("</TD></TR></TABLE></CENTER>\n");
 209         }
 210 }
 211
 212
 213 /*
 214  * Back end for cal_add() -- this writes it to the message base
 215  */
 216 void pencil_it_in(icalcomponent *cal) {
 217         char hold_rm[SIZ];
 218         char buf[SIZ];
 219         char *serialized_event;
 220
 221         /* Save the name of the room we're in */
 222         strcpy(hold_rm, WC->wc_roomname);
 223
 224         /* Go find the user's calendar */
 225         serv_printf("GOTO %s", CALENDAR_ROOM_NAME);
 226         serv_gets(buf);
 227         if (buf[0] != '2') return;
 228
 229         /* Enter the message */
 230         serialized_event = icalcomponent_as_ical_string(cal);
 231         if (serialized_event != NULL) {
 232                 sprintf(buf, "ENT0 1|||4||");
 233                 serv_puts(buf);
 234                 serv_gets(buf);
 235                 if (buf[0] == '4') {
 236                         serv_puts("Content-type: text/calendar");
 237                         serv_puts("");
 238                         serv_write(serialized_event, strlen(serialized_event));
 239                         serv_puts("");
 240                         serv_puts("000");
 241                 }
 242         }
 243
 244         /* Return to the room we were in */
 245         serv_printf("GOTO %s", hold_rm);
 246         serv_gets(buf);
 247 }
 248
 249
 250 /*
 251  * Add a calendar object to the user's calendar
 252  */
 253 void cal_add(icalcomponent *cal, int recursion_level, int tentative) {
 254         icalcomponent *c;
 255
 256         /*
 257          * The VEVENT subcomponent is the one we're interested in saving.
 258          */
 259         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 260                 /* Save to the message base */
 261                 pencil_it_in(cal);
 262
 263         }
 264
 265         /* If the component has subcomponents, recurse through them. */
 266         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 267             (c != 0);
 268             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 269                 /* Recursively process subcomponent */
 270                 cal_add(c, recursion_level+1, tentative);
 271         }
 272
 273 }
 274
 275
 276 /*
 277  * Deserialize a calendar object in a message so it can be processed.
 278  * (This is the main entry point for these things)
 279  */
 280 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 281         icalcomponent *cal;
 282
 283         cal = icalcomponent_new_from_string(part_source);
 284
 285         if (cal == NULL) {
 286                 wprintf("Error parsing calendar object: %s<BR>\n",
 287                         icalerror_strerror(icalerrno));
 288                 return;
 289         }
 290
 291         cal_process_object(cal, 0, msgnum, cal_partnum);
 292
 293         /* Free the memory we obtained from libical's constructor */
 294         icalcomponent_free(cal);
 295 }
 296
 297
 298
 299
 300 /*
 301  * Respond to a meeting request
 302  */
 303 void respond_to_request(void) {
 304         char buf[SIZ];
 305         size_t total_len;
 306         char *serialized_cal;
 307         icalcomponent *cal;
 308
 309         output_headers(3);
 310
 311         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 312                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 313                 "<B>Respond to meeting request</B>"
 314                 "</FONT></TD></TR></TABLE><BR>\n"
 315         );
 316
 317         sprintf(buf, "OPNA %s|%s", bstr("msgnum"), bstr("cal_partnum"));
 318         serv_puts(buf);
 319         serv_gets(buf);
 320         if (buf[0] != '2') {
 321                 wprintf("Error: %s<BR>\n", &buf[4]);
 322                 wDumpContent(1);
 323                 return;
 324         }
 325
 326         total_len = atoi(&buf[4]);
 327         serialized_cal = malloc(total_len + 1);
 328
 329         read_server_binary(serialized_cal, total_len);
 330
 331         serv_puts("CLOS");
 332         serv_gets(buf);
 333         serialized_cal[total_len + 1] = 0;
 334
 335         /* Deserialize it */
 336         cal = icalcomponent_new_from_string(serialized_cal);
 337         free(serialized_cal);
 338
 339         if (cal == NULL) {
 340                 wprintf("Error parsing calendar object: %s<BR>\n",
 341                         icalerror_strerror(icalerrno));
 342                 wDumpContent(1);
 343                 return;
 344         }
 345
 346         /* Save this in the user's calendar if necessary */
 347         if (!strcasecmp(bstr("sc"), "Accept")) {
 348                 cal_add(cal, 0, 0);
 349         }
 350         if (!strcasecmp(bstr("sc"), "Tentative")) {
 351                 cal_add(cal, 0, 1);
 352         }
 353
 354         /* Send a reply if necessary */
 355         /* FIXME ... do this */
 356
 357         /* Free the memory we obtained from libical's constructor */
 358         icalcomponent_free(cal);
 359
 360         /* Delete the message from the inbox */
 361         /* FIXME ... do this */
 362
 363
 364         wprintf("Done!<BR>\n");
 365
 366         /* ...and now we're done. */
 367         wDumpContent(1);
 368 }
 369
 370
 371
 372
 373 /*****************************************************************************/
 374
 375
 376
 377 /*
 378  * Display handlers for message reading
 379  */
 380
 381
 382
 383 /*
 384  * If we're reading calendar items, just store them for now.  We have to
 385  * sort and re-output them later when we draw the calendar.
 386  */
 387 void display_individual_cal(icalcomponent *cal, long msgnum) {
 388
 389         WC->num_cal += 1;
 390
 391         WC->disp_cal = realloc(WC->disp_cal,
 392                         (sizeof(icalcomponent *) * WC->num_cal) );
 393         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 394
 395         WC->cal_msgnum = realloc(WC->cal_msgnum,
 396                         (sizeof(long) * WC->num_cal) );
 397         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 398 }
 399
 400
 401
 402 /*
 403  * Display a task in the task list
 404  */
 405 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 406         icalproperty *p;
 407
 408         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 409         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 410         if (p != NULL) {
 411                 escputs((char *)icalproperty_get_comment(p));
 412         }
 413         wprintf("</A>\n");
 414 }
 415
 416
 417 /*
 418  * Display a task by itself (for editing)
 419  */
 420 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 421         icalcomponent *vtodo;
 422         icalproperty *p;
 423         struct icaltimetype t;
 424         time_t now;
 425         int created_new_vtodo = 0;
 426
 427         now = time(NULL);
 428
 429         if (supplied_vtodo != NULL) {
 430                 vtodo = supplied_vtodo;
 431         }
 432         else {
 433                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 434                 created_new_vtodo = 1;
 435         }
 436
 437         output_headers(3);
 438         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 439                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 440                 "<B>Edit task</B>"
 441                 "</FONT></TD></TR></TABLE><BR>\n"
 442         );
 443
 444         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 445         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 446                 msgnum);
 447
 448         wprintf("Summary: "
 449                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 450                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 451         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 452         if (p != NULL) {
 453                 escputs((char *)icalproperty_get_comment(p));
 454         }
 455         wprintf("\"><BR>\n");
 456
 457         wprintf("Start date: ");
 458         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 459         if (p != NULL) {
 460                 t = icalproperty_get_dtstart(p);
 461         }
 462         else {
 463                 t = icaltime_from_timet(now, 0);
 464         }
 465         display_icaltimetype_as_webform(&t, "dtstart");
 466         wprintf("<BR>\n");
 467
 468         wprintf("Due date: ");
 469         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 470         if (p != NULL) {
 471                 t = icalproperty_get_due(p);
 472         }
 473         else {
 474                 t = icaltime_from_timet(now, 0);
 475         }
 476         display_icaltimetype_as_webform(&t, "due");
 477         wprintf("<BR>\n");
 478
 479         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 480                 "ROWS=10 COLS=80 WIDTH=80>\n"
 481         );
 482         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 483         if (p != NULL) {
 484                 escputs((char *)icalproperty_get_comment(p));
 485         }
 486         wprintf("</TEXTAREA><BR>\n");
 487
 488         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 489                 "&nbsp;&nbsp;"
 490                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 491                 "&nbsp;&nbsp;"
 492                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 493                 "</CENTER>\n"
 494         );
 495
 496         wprintf("</FORM>\n");
 497
 498         wDumpContent(1);
 499
 500         if (created_new_vtodo) {
 501                 icalcomponent_free(vtodo);
 502         }
 503 }
 504
 505 /*
 506  * Save an edited task
 507  */
 508 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 509         char buf[SIZ];
 510         int delete_existing = 0;
 511         icalproperty *prop;
 512         icalcomponent *vtodo;
 513         int created_new_vtodo = 0;
 514
 515         if (supplied_vtodo != NULL) {
 516                 vtodo = supplied_vtodo;
 517         }
 518         else {
 519                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 520                 created_new_vtodo = 1;
 521         }
 522
 523         if (!strcasecmp(bstr("sc"), "Save")) {
 524
 525                 /* Replace values in the component with ones from the form */
 526
 527                 while (prop = icalcomponent_get_first_property(vtodo,
 528                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 529                         icalcomponent_remove_property(vtodo, prop);
 530                 }
 531                 icalcomponent_add_property(vtodo,
 532                         icalproperty_new_summary(bstr("summary")));
 533
 534                 while (prop = icalcomponent_get_first_property(vtodo,
 535                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 536                         icalcomponent_remove_property(vtodo, prop);
 537                 }
 538                 icalcomponent_add_property(vtodo,
 539                         icalproperty_new_description(bstr("description")));
 540
 541                 while (prop = icalcomponent_get_first_property(vtodo,
 542                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 543                         icalcomponent_remove_property(vtodo, prop);
 544                 }
 545                 icalcomponent_add_property(vtodo,
 546                         icalproperty_new_dtstart(
 547                                 icaltime_from_webform("dtstart")
 548                         )
 549                 );
 550
 551                 while (prop = icalcomponent_get_first_property(vtodo,
 552                       ICAL_DUE_PROPERTY), prop != NULL) {
 553                         icalcomponent_remove_property(vtodo, prop);
 554                 }
 555                 icalcomponent_add_property(vtodo,
 556                         icalproperty_new_due(
 557                                 icaltime_from_webform("due")
 558                         )
 559                 );
 560
 561                 /* Serialize it and save it to the message base */
 562                 serv_puts("ENT0 1|||4");
 563                 serv_gets(buf);
 564                 if (buf[0] == '4') {
 565                         serv_puts("Content-type: text/calendar");
 566                         serv_puts("");
 567                         serv_puts(icalcomponent_as_ical_string(vtodo));
 568                         serv_puts("000");
 569                         delete_existing = 1;
 570                 }
 571         }
 572
 573         /*
 574          * If the user clicked 'Delete' then delete it, period.
 575          */
 576         if (!strcasecmp(bstr("sc"), "Delete")) {
 577                 delete_existing = 1;
 578         }
 579
 580         if ( (delete_existing) && (msgnum > 0L) ) {
 581                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 582                 serv_gets(buf);
 583         }
 584
 585         if (created_new_vtodo) {
 586                 icalcomponent_free(vtodo);
 587         }
 588
 589         /* Go back to the task list */
 590         readloop("readfwd");
 591 }
 592
 593
 594
 595 /*
 596  * Code common to all display handlers.  Given a message number and a MIME
 597  * type, we load the message and hunt for that MIME type.  If found, we load
 598  * the relevant part, deserialize it into a libical component, filter it for
 599  * the requested object type, and feed it to the specified handler.
 600  */
 601 void display_using_handler(long msgnum,
 602                         char *mimetype,
 603                         icalcomponent_kind which_kind,
 604                         void (*callback)(icalcomponent *, long)
 605         ) {
 606         char buf[SIZ];
 607         char mime_partnum[SIZ];
 608         char mime_filename[SIZ];
 609         char mime_content_type[SIZ];
 610         char mime_disposition[SIZ];
 611         int mime_length;
 612         char relevant_partnum[SIZ];
 613         char *relevant_source = NULL;
 614         icalcomponent *cal, *c;
 615
 616         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 617         serv_puts(buf);
 618         serv_gets(buf);
 619         if (buf[0] != '1') return;
 620
 621         while (serv_gets(buf), strcmp(buf, "000")) {
 622                 if (!strncasecmp(buf, "part=", 5)) {
 623                         extract(mime_filename, &buf[5], 1);
 624                         extract(mime_partnum, &buf[5], 2);
 625                         extract(mime_disposition, &buf[5], 3);
 626                         extract(mime_content_type, &buf[5], 4);
 627                         mime_length = extract_int(&buf[5], 5);
 628
 629                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 630                                 strcpy(relevant_partnum, mime_partnum);
 631                         }
 632
 633                 }
 634         }
 635
 636         if (strlen(relevant_partnum) > 0) {
 637                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 638                 if (relevant_source != NULL) {
 639
 640                         cal = icalcomponent_new_from_string(relevant_source);
 641                         if (cal != NULL) {
 642
 643                                 /* Simple components of desired type */
 644                                 if (icalcomponent_isa(cal) == which_kind) {
 645                                         callback(cal, msgnum);
 646                                 }
 647
 648                                 /* Subcomponents of desired type */
 649                                 for (c = icalcomponent_get_first_component(cal,
 650                                     which_kind);
 651                                     (c != 0);
 652                                     c = icalcomponent_get_next_component(cal,
 653                                     which_kind)) {
 654                                         callback(c, msgnum);
 655                                 }
 656                                 icalcomponent_free(cal);
 657                         }
 658                         free(relevant_source);
 659                 }
 660         }
 661
 662 }
 663
 664 void display_calendar(long msgnum) {
 665         display_using_handler(msgnum, "text/calendar",
 666                                 ICAL_VEVENT_COMPONENT,
 667                                 display_individual_cal);
 668 }
 669
 670 void display_task(long msgnum) {
 671         display_using_handler(msgnum, "text/calendar",
 672                                 ICAL_VTODO_COMPONENT,
 673                                 display_individual_task);
 674 }
 675
 676 void display_edit_task(void) {
 677         long msgnum = 0L;
 678
 679         msgnum = atol(bstr("msgnum"));
 680         if (msgnum > 0L) {
 681                 /* existing task */
 682                 display_using_handler(msgnum, "text/calendar",
 683                                 ICAL_VTODO_COMPONENT,
 684                                 display_edit_individual_task);
 685         }
 686         else {
 687                 /* new task */
 688                 display_edit_individual_task(NULL, 0L);
 689         }
 690 }
 691
 692 void save_task(void) {
 693         long msgnum = 0L;
 694
 695         msgnum = atol(bstr("msgnum"));
 696         if (msgnum > 0L) {
 697                 display_using_handler(msgnum, "text/calendar",
 698                                 ICAL_VTODO_COMPONENT,
 699                                 save_individual_task);
 700         }
 701         else {
 702                 save_individual_task(NULL, 0L);
 703         }
 704 }
 705
 706 void display_edit_event(void) {
 707         long msgnum = 0L;
 708
 709         msgnum = atol(bstr("msgnum"));
 710         if (msgnum > 0L) {
 711                 /* existing event */
 712                 display_using_handler(msgnum, "text/calendar",
 713                                 ICAL_VEVENT_COMPONENT,
 714                                 display_edit_individual_event);
 715         }
 716         else {
 717                 /* new event */
 718                 display_edit_individual_event(NULL, 0L);
 719         }
 720 }
 721
 722 void save_event(void) {
 723         long msgnum = 0L;
 724
 725         msgnum = atol(bstr("msgnum"));
 726
 727         if (msgnum > 0L) {
 728                 display_using_handler(msgnum, "text/calendar",
 729                                 ICAL_VEVENT_COMPONENT,
 730                                 save_individual_event);
 731         }
 732         else {
 733                 save_individual_event(NULL, 0L);
 734         }
 735 }
 736
 737 #endif /* HAVE_ICAL_H */