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_REPLY:
 111                         wprintf("<TR><TD COLSPAN=2>\n"
 112                                 "<IMG ALIGN=CENTER "
 113                                 "SRC=\"/static/vcalendar.gif\">"
 114                                 "&nbsp;&nbsp;"
 115                                 "<B>Attendee's reply to your invitation</B>
 116                                 </TD></TR>\n"
 117                         );
 118                         break;
 119                     case ICAL_METHOD_PUBLISH:
 120                         wprintf("<TR><TD COLSPAN=2>\n"
 121                                 "<IMG ALIGN=CENTER "
 122                                 "SRC=\"/static/vcalendar.gif\">"
 123                                 "&nbsp;&nbsp;"
 124                                 "<B>Published event</B>
 125                                 </TD></TR>\n"
 126                         );
 127                         break;
 128                     default:
 129                         wprintf("<TR><TD COLSPAN=2>"
 130                                 "I don't know what to do with this.</TD></TR>"
 131                                 "\n");
 132                         break;
 133                 }
 134         }
 135
 136         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 137         if (p != NULL) {
 138                 wprintf("<TR><TD><B>Summary:</B></TD><TD>");
 139                 escputs((char *)icalproperty_get_comment(p));
 140                 wprintf("</TD></TR>\n");
 141         }
 142
 143         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 144         if (p != NULL) {
 145                 wprintf("<TR><TD><B>Location:</B></TD><TD>");
 146                 escputs((char *)icalproperty_get_comment(p));
 147                 wprintf("</TD></TR>\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                                 wprintf("<TR><TD><B>Date:"
 163                                         "</B></TD><TD>"
 164                                         "%s %d, %d</TD></TR>",
 165                                         months[t.month - 1],
 166                                         t.day, t.year
 167                                 );
 168                         }
 169                         else {
 170                                 tt = icaltime_as_timet(t);
 171                                 fmt_date(buf, tt);
 172                                 wprintf("<TR><TD><B>Starting date/time:"
 173                                         "</B></TD><TD>"
 174                                         "%s</TD></TR>", buf
 175                                 );
 176                         }
 177                 }
 178
 179                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 180                 if (p != NULL) {
 181                         t = icalproperty_get_dtend(p);
 182                         tt = icaltime_as_timet(t);
 183                         fmt_date(buf, tt);
 184                         wprintf("<TR><TD><B>Ending date/time:</B></TD><TD>"
 185                                 "%s</TD></TR>", buf
 186                         );
 187                 }
 188
 189         }
 190
 191         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 192         if (p != NULL) {
 193                 wprintf("<TR><TD><B>Description:</B></TD><TD>");
 194                 escputs((char *)icalproperty_get_comment(p));
 195                 wprintf("</TD></TR>\n");
 196         }
 197
 198         /* If the component has attendees, iterate through them. */
 199         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 200                 wprintf("<TR><TD><B>Attendee:</B></TD><TD>");
 201                 strcpy(buf, icalproperty_get_attendee(p));
 202                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 203                         strcpy(buf, &buf[7]);
 204                         striplt(buf);
 205                         escputs(buf);
 206                 }
 207                 /* FIXME add status */
 208                 wprintf("</TD></TR>\n");
 209         }
 210
 211         /* If the component has subcomponents, recurse through them. */
 212         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 213             (c != 0);
 214             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 215                 /* Recursively process subcomponent */
 216                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 217         }
 218
 219         /* If this is a REQUEST, display conflicts and buttons */
 220         if (the_method == ICAL_METHOD_REQUEST) {
 221
 222                 /* Check for conflicts */
 223                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 224                 serv_gets(buf);
 225                 if (buf[0] == '1') {
 226                         while (serv_gets(buf), strcmp(buf, "000")) {
 227                                 extract(conflict_name, buf, 3);
 228                                 is_update = extract_int(buf, 4);
 229                                 wprintf("<TR><TD><B><I>%s</I></B></TD>"
 230                                         "<TD>"
 231                                         "%s "
 232                                         "<I>&quot;",
 233
 234                                         (is_update ?
 235                                                 "Update:" :
 236                                                 "CONFLICT:"
 237                                         ),
 238
 239                                         (is_update ?
 240                                                 "This is an update of" :
 241                                                 "This event would conflict with"
 242                                         )
 243
 244                                 );
 245                                 escputs(conflict_name);
 246                                 wprintf("&quot;</I> "
 247                                         "which is already in your calendar."
 248                                         "</TD></TR>\n");
 249                         }
 250                 }
 251
 252                 /* Display the Accept/Decline buttons */
 253                 wprintf("<TR><TD COLSPAN=2>"
 254                         "<FORM METHOD=\"GET\" "
 255                         "ACTION=\"/respond_to_request\">\n"
 256                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 257                                 "VALUE=\"Accept\">\n"
 258                         "&nbsp;&nbsp;"
 259                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 260                                 "VALUE=\"Tentative\">\n"
 261                         "&nbsp;&nbsp;"
 262                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 263                                 "VALUE=\"Decline\">\n"
 264                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 265                                 "VALUE=\"%ld\">"
 266                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 267                                 "VALUE=\"%s\">"
 268                         "</FORM>"
 269                         "</TD></TR>\n",
 270                         msgnum, cal_partnum
 271                 );
 272
 273         }
 274
 275         /* If this is a REPLY, display update button */
 276         if (the_method == ICAL_METHOD_REPLY) {
 277
 278                 /***********
 279                  * In the future, if we want to validate this object before
 280                  * continuing, we can do it this way:
 281                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 282                 serv_gets(buf);
 283                 }
 284                  ***********/
 285
 286                 /* Display the update buttons */
 287                 wprintf("<TR><TD COLSPAN=2>"
 288                         "Click <i>Update</i> to accept this reply and "
 289                         "update your calendar."
 290                         "<FORM METHOD=\"GET\" "
 291                         "ACTION=\"/handle_rsvp\">\n"
 292                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 293                                 "VALUE=\"Update\">\n"
 294                         "&nbsp;&nbsp;"
 295                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 296                                 "VALUE=\"Ignore\">\n"
 297                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 298                                 "VALUE=\"%ld\">"
 299                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 300                                 "VALUE=\"%s\">"
 301                         "</FORM>"
 302                         "</TD></TR>\n",
 303                         msgnum, cal_partnum
 304                 );
 305
 306         }
 307
 308         /* Trailing HTML for the display of this object */
 309         if (recursion_level == 0) {
 310
 311                 wprintf("</TR></TABLE></CENTER>\n");
 312         }
 313 }
 314
 315
 316 /*
 317  * Deserialize a calendar object in a message so it can be processed.
 318  * (This is the main entry point for these things)
 319  */
 320 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 321         icalcomponent *cal;
 322
 323         cal = icalcomponent_new_from_string(part_source);
 324
 325         if (cal == NULL) {
 326                 wprintf("Error parsing calendar object<BR>\n");
 327                 return;
 328         }
 329
 330         cal_process_object(cal, 0, msgnum, cal_partnum);
 331
 332         /* Free the memory we obtained from libical's constructor */
 333         icalcomponent_free(cal);
 334 }
 335
 336
 337
 338
 339 /*
 340  * Respond to a meeting request
 341  */
 342 void respond_to_request(void) {
 343         char buf[SIZ];
 344
 345         output_headers(3);
 346
 347         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 348                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 349                 "<B>Respond to meeting request</B>"
 350                 "</FONT></TD></TR></TABLE><BR>\n"
 351         );
 352
 353         serv_printf("ICAL respond|%s|%s|%s|",
 354                 bstr("msgnum"),
 355                 bstr("cal_partnum"),
 356                 bstr("sc")
 357         );
 358         serv_gets(buf);
 359
 360         if (buf[0] == '2') {
 361                 wprintf("<TABLE BORDER=0><TR><TD>"
 362                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 363                         "</TD><TD>"
 364                 );
 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("and a reply has been sent to the meeting organizer."
 379                         "</TD></TR></TABLE>\n"
 380                 );
 381         } else {
 382                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 383                         "%s\n", &buf[4]);
 384         }
 385
 386         wprintf("<A HREF=\"/dotskip?room=");
 387         urlescputs(WC->wc_roomname);
 388         wprintf("\"><BR>Return to messages</A><BR>\n");
 389
 390         wDumpContent(1);
 391 }
 392
 393
 394
 395 /*
 396  * Handle an incoming RSVP
 397  */
 398 void handle_rsvp(void) {
 399         char buf[SIZ];
 400
 401         output_headers(3);
 402
 403         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 404                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 405                 "<B>Update your calendar with this RSVP</B>"
 406                 "</FONT></TD></TR></TABLE><BR>\n"
 407         );
 408
 409         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 410                 bstr("msgnum"),
 411                 bstr("cal_partnum"),
 412                 bstr("sc")
 413         );
 414         serv_gets(buf);
 415
 416         if (buf[0] == '2') {
 417                 wprintf("<TABLE BORDER=0><TR><TD>"
 418                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 419                         "</TD><TD>"
 420                 );
 421                 if (!strcasecmp(bstr("sc"), "update")) {
 422                         wprintf("Your calendar has been updated "
 423                                 "to reflect this RSVP."
 424                         );
 425                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 426                         wprintf("You have chosen to ignore this RSVP. "
 427                                 "Your calendar has <b>not</b> been updated."
 428                         );
 429                 }
 430                 wprintf("</TD></TR></TABLE>\n"
 431                 );
 432         } else {
 433                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 434                         "%s\n", &buf[4]);
 435         }
 436
 437         wprintf("<A HREF=\"/dotskip?room=");
 438         urlescputs(WC->wc_roomname);
 439         wprintf("\"><BR>Return to messages</A><BR>\n");
 440
 441         wDumpContent(1);
 442 }
 443
 444
 445
 446
 447 /*****************************************************************************/
 448
 449
 450
 451 /*
 452  * Display handlers for message reading
 453  */
 454
 455
 456
 457 /*
 458  * If we're reading calendar items, just store them for now.  We have to
 459  * sort and re-output them later when we draw the calendar.
 460  */
 461 void display_individual_cal(icalcomponent *cal, long msgnum) {
 462
 463         WC->num_cal += 1;
 464
 465         WC->disp_cal = realloc(WC->disp_cal,
 466                         (sizeof(icalcomponent *) * WC->num_cal) );
 467         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 468
 469         WC->cal_msgnum = realloc(WC->cal_msgnum,
 470                         (sizeof(long) * WC->num_cal) );
 471         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 472 }
 473
 474
 475
 476 /*
 477  * Display a task in the task list
 478  */
 479 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 480         icalproperty *p;
 481
 482         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 483         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 484         if (p != NULL) {
 485                 escputs((char *)icalproperty_get_comment(p));
 486         }
 487         wprintf("</A>\n");
 488 }
 489
 490
 491 /*
 492  * Display a task by itself (for editing)
 493  */
 494 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 495         icalcomponent *vtodo;
 496         icalproperty *p;
 497         struct icaltimetype t;
 498         time_t now;
 499         int created_new_vtodo = 0;
 500
 501         now = time(NULL);
 502
 503         if (supplied_vtodo != NULL) {
 504                 vtodo = supplied_vtodo;
 505         }
 506         else {
 507                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 508                 created_new_vtodo = 1;
 509         }
 510
 511         output_headers(3);
 512         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 513                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 514                 "<B>Edit task</B>"
 515                 "</FONT></TD></TR></TABLE><BR>\n"
 516         );
 517
 518         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 519         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 520                 msgnum);
 521
 522         wprintf("Summary: "
 523                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 524                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 525         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 526         if (p != NULL) {
 527                 escputs((char *)icalproperty_get_comment(p));
 528         }
 529         wprintf("\"><BR>\n");
 530
 531         wprintf("Start date: ");
 532         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 533         if (p != NULL) {
 534                 t = icalproperty_get_dtstart(p);
 535         }
 536         else {
 537                 t = icaltime_from_timet(now, 0);
 538         }
 539         display_icaltimetype_as_webform(&t, "dtstart");
 540         wprintf("<BR>\n");
 541
 542         wprintf("Due date: ");
 543         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 544         if (p != NULL) {
 545                 t = icalproperty_get_due(p);
 546         }
 547         else {
 548                 t = icaltime_from_timet(now, 0);
 549         }
 550         display_icaltimetype_as_webform(&t, "due");
 551         wprintf("<BR>\n");
 552
 553         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 554                 "ROWS=10 COLS=80 WIDTH=80>\n"
 555         );
 556         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 557         if (p != NULL) {
 558                 escputs((char *)icalproperty_get_comment(p));
 559         }
 560         wprintf("</TEXTAREA><BR>\n");
 561
 562         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 563                 "&nbsp;&nbsp;"
 564                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 565                 "&nbsp;&nbsp;"
 566                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 567                 "</CENTER>\n"
 568         );
 569
 570         wprintf("</FORM>\n");
 571
 572         wDumpContent(1);
 573
 574         if (created_new_vtodo) {
 575                 icalcomponent_free(vtodo);
 576         }
 577 }
 578
 579 /*
 580  * Save an edited task
 581  */
 582 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 583         char buf[SIZ];
 584         int delete_existing = 0;
 585         icalproperty *prop;
 586         icalcomponent *vtodo;
 587         int created_new_vtodo = 0;
 588
 589         if (supplied_vtodo != NULL) {
 590                 vtodo = supplied_vtodo;
 591         }
 592         else {
 593                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 594                 created_new_vtodo = 1;
 595         }
 596
 597         if (!strcasecmp(bstr("sc"), "Save")) {
 598
 599                 /* Replace values in the component with ones from the form */
 600
 601                 while (prop = icalcomponent_get_first_property(vtodo,
 602                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 603                         icalcomponent_remove_property(vtodo, prop);
 604                         icalproperty_free(prop);
 605                 }
 606                 icalcomponent_add_property(vtodo,
 607                         icalproperty_new_summary(bstr("summary")));
 608
 609                 while (prop = icalcomponent_get_first_property(vtodo,
 610                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 611                         icalcomponent_remove_property(vtodo, prop);
 612                         icalproperty_free(prop);
 613                 }
 614                 icalcomponent_add_property(vtodo,
 615                         icalproperty_new_description(bstr("description")));
 616
 617                 while (prop = icalcomponent_get_first_property(vtodo,
 618                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 619                         icalcomponent_remove_property(vtodo, prop);
 620                         icalproperty_free(prop);
 621                 }
 622                 icalcomponent_add_property(vtodo,
 623                         icalproperty_new_dtstart(
 624                                 icaltime_from_webform("dtstart")
 625                         )
 626                 );
 627
 628                 while (prop = icalcomponent_get_first_property(vtodo,
 629                       ICAL_DUE_PROPERTY), prop != NULL) {
 630                         icalcomponent_remove_property(vtodo, prop);
 631                         icalproperty_free(prop);
 632                 }
 633                 icalcomponent_add_property(vtodo,
 634                         icalproperty_new_due(
 635                                 icaltime_from_webform("due")
 636                         )
 637                 );
 638
 639                 /* Serialize it and save it to the message base */
 640                 serv_puts("ENT0 1|||4");
 641                 serv_gets(buf);
 642                 if (buf[0] == '4') {
 643                         serv_puts("Content-type: text/calendar");
 644                         serv_puts("");
 645                         serv_puts(icalcomponent_as_ical_string(vtodo));
 646                         serv_puts("000");
 647
 648                         /* Probably not necessary; the server will see the UID
 649                          * of the object and delete the old one anyway, but
 650                          * just in case...
 651                          */
 652                         delete_existing = 1;
 653                 }
 654         }
 655
 656         /*
 657          * If the user clicked 'Delete' then explicitly delete the message.
 658          */
 659         if (!strcasecmp(bstr("sc"), "Delete")) {
 660                 delete_existing = 1;
 661         }
 662
 663         if ( (delete_existing) && (msgnum > 0L) ) {
 664                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 665                 serv_gets(buf);
 666         }
 667
 668         if (created_new_vtodo) {
 669                 icalcomponent_free(vtodo);
 670         }
 671
 672         /* Go back to the task list */
 673         readloop("readfwd");
 674 }
 675
 676
 677
 678 /*
 679  * Code common to all display handlers.  Given a message number and a MIME
 680  * type, we load the message and hunt for that MIME type.  If found, we load
 681  * the relevant part, deserialize it into a libical component, filter it for
 682  * the requested object type, and feed it to the specified handler.
 683  */
 684 void display_using_handler(long msgnum,
 685                         char *mimetype,
 686                         icalcomponent_kind which_kind,
 687                         void (*callback)(icalcomponent *, long)
 688         ) {
 689         char buf[SIZ];
 690         char mime_partnum[SIZ];
 691         char mime_filename[SIZ];
 692         char mime_content_type[SIZ];
 693         char mime_disposition[SIZ];
 694         int mime_length;
 695         char relevant_partnum[SIZ];
 696         char *relevant_source = NULL;
 697         icalcomponent *cal, *c;
 698
 699         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 700         serv_puts(buf);
 701         serv_gets(buf);
 702         if (buf[0] != '1') return;
 703
 704         while (serv_gets(buf), strcmp(buf, "000")) {
 705                 if (!strncasecmp(buf, "part=", 5)) {
 706                         extract(mime_filename, &buf[5], 1);
 707                         extract(mime_partnum, &buf[5], 2);
 708                         extract(mime_disposition, &buf[5], 3);
 709                         extract(mime_content_type, &buf[5], 4);
 710                         mime_length = extract_int(&buf[5], 5);
 711
 712                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 713                                 strcpy(relevant_partnum, mime_partnum);
 714                         }
 715
 716                 }
 717         }
 718
 719         if (strlen(relevant_partnum) > 0) {
 720                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 721                 if (relevant_source != NULL) {
 722
 723                         cal = icalcomponent_new_from_string(relevant_source);
 724                         if (cal != NULL) {
 725
 726                                 /* Simple components of desired type */
 727                                 if (icalcomponent_isa(cal) == which_kind) {
 728                                         callback(cal, msgnum);
 729                                 }
 730
 731                                 /* Subcomponents of desired type */
 732                                 for (c = icalcomponent_get_first_component(cal,
 733                                     which_kind);
 734                                     (c != 0);
 735                                     c = icalcomponent_get_next_component(cal,
 736                                     which_kind)) {
 737                                         callback(c, msgnum);
 738                                 }
 739                                 icalcomponent_free(cal);
 740                         }
 741                         free(relevant_source);
 742                 }
 743         }
 744
 745 }
 746
 747 void display_calendar(long msgnum) {
 748         display_using_handler(msgnum, "text/calendar",
 749                                 ICAL_VEVENT_COMPONENT,
 750                                 display_individual_cal);
 751 }
 752
 753 void display_task(long msgnum) {
 754         display_using_handler(msgnum, "text/calendar",
 755                                 ICAL_VTODO_COMPONENT,
 756                                 display_individual_task);
 757 }
 758
 759 void display_edit_task(void) {
 760         long msgnum = 0L;
 761
 762         msgnum = atol(bstr("msgnum"));
 763         if (msgnum > 0L) {
 764                 /* existing task */
 765                 display_using_handler(msgnum, "text/calendar",
 766                                 ICAL_VTODO_COMPONENT,
 767                                 display_edit_individual_task);
 768         }
 769         else {
 770                 /* new task */
 771                 display_edit_individual_task(NULL, 0L);
 772         }
 773 }
 774
 775 void save_task(void) {
 776         long msgnum = 0L;
 777
 778         msgnum = atol(bstr("msgnum"));
 779         if (msgnum > 0L) {
 780                 display_using_handler(msgnum, "text/calendar",
 781                                 ICAL_VTODO_COMPONENT,
 782                                 save_individual_task);
 783         }
 784         else {
 785                 save_individual_task(NULL, 0L);
 786         }
 787 }
 788
 789 void display_edit_event(void) {
 790         long msgnum = 0L;
 791
 792         msgnum = atol(bstr("msgnum"));
 793         if (msgnum > 0L) {
 794                 /* existing event */
 795                 display_using_handler(msgnum, "text/calendar",
 796                                 ICAL_VEVENT_COMPONENT,
 797                                 display_edit_individual_event);
 798         }
 799         else {
 800                 /* new event */
 801                 display_edit_individual_event(NULL, 0L);
 802         }
 803 }
 804
 805 void save_event(void) {
 806         long msgnum = 0L;
 807
 808         msgnum = atol(bstr("msgnum"));
 809
 810         if (msgnum > 0L) {
 811                 display_using_handler(msgnum, "text/calendar",
 812                                 ICAL_VEVENT_COMPONENT,
 813                                 save_individual_event);
 814         }
 815         else {
 816                 save_individual_event(NULL, 0L);
 817         }
 818 }
 819
 820 #endif /* HAVE_ICAL_H */