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                 lprintf(9, "Checking server calendar for conflicts...\n");
 224                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 225                 serv_gets(buf);
 226                 if (buf[0] == '1') {
 227                         while (serv_gets(buf), strcmp(buf, "000")) {
 228                                 extract(conflict_name, buf, 3);
 229                                 is_update = extract_int(buf, 4);
 230                                 wprintf("<TR><TD><B><I>%s</I></B></TD>"
 231                                         "<TD>"
 232                                         "%s "
 233                                         "<I>&quot;",
 234
 235                                         (is_update ?
 236                                                 "Update:" :
 237                                                 "CONFLICT:"
 238                                         ),
 239
 240                                         (is_update ?
 241                                                 "This is an update of" :
 242                                                 "This event would conflict with"
 243                                         )
 244
 245                                 );
 246                                 escputs(conflict_name);
 247                                 wprintf("&quot;</I> "
 248                                         "which is already in your calendar."
 249                                         "</TD></TR>\n");
 250                         }
 251                 }
 252                 lprintf(9, "...done.\n");
 253
 254                 /* Display the Accept/Decline buttons */
 255                 wprintf("<TR><TD COLSPAN=2>"
 256                         "<FORM METHOD=\"GET\" "
 257                         "ACTION=\"/respond_to_request\">\n"
 258                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 259                                 "VALUE=\"Accept\">\n"
 260                         "&nbsp;&nbsp;"
 261                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 262                                 "VALUE=\"Tentative\">\n"
 263                         "&nbsp;&nbsp;"
 264                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 265                                 "VALUE=\"Decline\">\n"
 266                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 267                                 "VALUE=\"%ld\">"
 268                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 269                                 "VALUE=\"%s\">"
 270                         "</FORM>"
 271                         "</TD></TR>\n",
 272                         msgnum, cal_partnum
 273                 );
 274
 275         }
 276
 277         /* If this is a REPLY, display update button */
 278         if (the_method == ICAL_METHOD_REPLY) {
 279
 280                 /***********
 281                  * In the future, if we want to validate this object before
 282                  * continuing, we can do it this way:
 283                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 284                 serv_gets(buf);
 285                 }
 286                  ***********/
 287
 288                 /* Display the update buttons */
 289                 wprintf("<TR><TD COLSPAN=2>"
 290                         "Click <i>Update</i> to accept this reply and "
 291                         "update your calendar."
 292                         "<FORM METHOD=\"GET\" "
 293                         "ACTION=\"/handle_rsvp\">\n"
 294                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 295                                 "VALUE=\"Update\">\n"
 296                         "&nbsp;&nbsp;"
 297                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 298                                 "VALUE=\"Ignore\">\n"
 299                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 300                                 "VALUE=\"%ld\">"
 301                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 302                                 "VALUE=\"%s\">"
 303                         "</FORM>"
 304                         "</TD></TR>\n",
 305                         msgnum, cal_partnum
 306                 );
 307
 308         }
 309
 310         /* Trailing HTML for the display of this object */
 311         if (recursion_level == 0) {
 312
 313                 wprintf("</TR></TABLE></CENTER>\n");
 314         }
 315 }
 316
 317
 318 /*
 319  * Deserialize a calendar object in a message so it can be processed.
 320  * (This is the main entry point for these things)
 321  */
 322 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 323         icalcomponent *cal;
 324
 325         cal = icalcomponent_new_from_string(part_source);
 326
 327         if (cal == NULL) {
 328                 wprintf("Error parsing calendar object<BR>\n");
 329                 return;
 330         }
 331
 332         ical_dezonify(cal);
 333         cal_process_object(cal, 0, msgnum, cal_partnum);
 334
 335         /* Free the memory we obtained from libical's constructor */
 336         icalcomponent_free(cal);
 337 }
 338
 339
 340
 341
 342 /*
 343  * Respond to a meeting request
 344  */
 345 void respond_to_request(void) {
 346         char buf[SIZ];
 347
 348         output_headers(3);
 349
 350         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 351                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 352                 "<B>Respond to meeting request</B>"
 353                 "</FONT></TD></TR></TABLE><BR>\n"
 354         );
 355
 356         serv_printf("ICAL respond|%s|%s|%s|",
 357                 bstr("msgnum"),
 358                 bstr("cal_partnum"),
 359                 bstr("sc")
 360         );
 361         serv_gets(buf);
 362
 363         if (buf[0] == '2') {
 364                 wprintf("<TABLE BORDER=0><TR><TD>"
 365                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 366                         "</TD><TD>"
 367                 );
 368                 if (!strcasecmp(bstr("sc"), "accept")) {
 369                         wprintf("You have accepted this meeting invitation.  "
 370                                 "It has been entered into your calendar, "
 371                         );
 372                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 373                         wprintf("You have tentatively accepted this meeting invitation.  "
 374                                 "It has been 'pencilled in' to your calendar, "
 375                         );
 376                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 377                         wprintf("You have declined this meeting invitation.  "
 378                                 "It has <b>not</b> been entered into your calendar, "
 379                         );
 380                 }
 381                 wprintf("and a reply has been sent to the meeting organizer."
 382                         "</TD></TR></TABLE>\n"
 383                 );
 384         } else {
 385                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 386                         "%s\n", &buf[4]);
 387         }
 388
 389         wprintf("<A HREF=\"/dotskip?room=");
 390         urlescputs(WC->wc_roomname);
 391         wprintf("\"><BR>Return to messages</A><BR>\n");
 392
 393         wDumpContent(1);
 394 }
 395
 396
 397
 398 /*
 399  * Handle an incoming RSVP
 400  */
 401 void handle_rsvp(void) {
 402         char buf[SIZ];
 403
 404         output_headers(3);
 405
 406         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 407                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 408                 "<B>Update your calendar with this RSVP</B>"
 409                 "</FONT></TD></TR></TABLE><BR>\n"
 410         );
 411
 412         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 413                 bstr("msgnum"),
 414                 bstr("cal_partnum"),
 415                 bstr("sc")
 416         );
 417         serv_gets(buf);
 418
 419         if (buf[0] == '2') {
 420                 wprintf("<TABLE BORDER=0><TR><TD>"
 421                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 422                         "</TD><TD>"
 423                 );
 424                 if (!strcasecmp(bstr("sc"), "update")) {
 425                         wprintf("Your calendar has been updated "
 426                                 "to reflect this RSVP."
 427                         );
 428                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 429                         wprintf("You have chosen to ignore this RSVP. "
 430                                 "Your calendar has <b>not</b> been updated."
 431                         );
 432                 }
 433                 wprintf("</TD></TR></TABLE>\n"
 434                 );
 435         } else {
 436                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 437                         "%s\n", &buf[4]);
 438         }
 439
 440         wprintf("<A HREF=\"/dotskip?room=");
 441         urlescputs(WC->wc_roomname);
 442         wprintf("\"><BR>Return to messages</A><BR>\n");
 443
 444         wDumpContent(1);
 445 }
 446
 447
 448
 449
 450 /*****************************************************************************/
 451
 452
 453
 454 /*
 455  * Display handlers for message reading
 456  */
 457
 458
 459
 460 /*
 461  * If we're reading calendar items, just store them for now.  We have to
 462  * sort and re-output them later when we draw the calendar.
 463  */
 464 void display_individual_cal(icalcomponent *cal, long msgnum) {
 465
 466         WC->num_cal += 1;
 467
 468         WC->disp_cal = realloc(WC->disp_cal,
 469                         (sizeof(icalcomponent *) * WC->num_cal) );
 470         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 471
 472         WC->cal_msgnum = realloc(WC->cal_msgnum,
 473                         (sizeof(long) * WC->num_cal) );
 474         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 475 }
 476
 477
 478
 479 /*
 480  * Display a task in the task list
 481  */
 482 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 483         icalproperty *p;
 484
 485         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 486         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 487         if (p != NULL) {
 488                 escputs((char *)icalproperty_get_comment(p));
 489         }
 490         wprintf("</A>\n");
 491 }
 492
 493
 494 /*
 495  * Display a task by itself (for editing)
 496  */
 497 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 498         icalcomponent *vtodo;
 499         icalproperty *p;
 500         struct icaltimetype t;
 501         time_t now;
 502         int created_new_vtodo = 0;
 503
 504         now = time(NULL);
 505
 506         if (supplied_vtodo != NULL) {
 507                 vtodo = supplied_vtodo;
 508         }
 509         else {
 510                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 511                 created_new_vtodo = 1;
 512         }
 513
 514         output_headers(3);
 515         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 516                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 517                 "<B>Edit task</B>"
 518                 "</FONT></TD></TR></TABLE><BR>\n"
 519         );
 520
 521         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 522         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 523                 msgnum);
 524
 525         wprintf("Summary: "
 526                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 527                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 528         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 529         if (p != NULL) {
 530                 escputs((char *)icalproperty_get_comment(p));
 531         }
 532         wprintf("\"><BR>\n");
 533
 534         wprintf("Start date: ");
 535         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 536         if (p != NULL) {
 537                 t = icalproperty_get_dtstart(p);
 538         }
 539         else {
 540                 t = icaltime_from_timet(now, 0);
 541         }
 542         display_icaltimetype_as_webform(&t, "dtstart");
 543         wprintf("<BR>\n");
 544
 545         wprintf("Due date: ");
 546         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 547         if (p != NULL) {
 548                 t = icalproperty_get_due(p);
 549         }
 550         else {
 551                 t = icaltime_from_timet(now, 0);
 552         }
 553         display_icaltimetype_as_webform(&t, "due");
 554         wprintf("<BR>\n");
 555
 556         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 557                 "ROWS=10 COLS=80 WIDTH=80>\n"
 558         );
 559         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 560         if (p != NULL) {
 561                 escputs((char *)icalproperty_get_comment(p));
 562         }
 563         wprintf("</TEXTAREA><BR>\n");
 564
 565         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 566                 "&nbsp;&nbsp;"
 567                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 568                 "&nbsp;&nbsp;"
 569                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 570                 "</CENTER>\n"
 571         );
 572
 573         wprintf("</FORM>\n");
 574
 575         wDumpContent(1);
 576
 577         if (created_new_vtodo) {
 578                 icalcomponent_free(vtodo);
 579         }
 580 }
 581
 582 /*
 583  * Save an edited task
 584  */
 585 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 586         char buf[SIZ];
 587         int delete_existing = 0;
 588         icalproperty *prop;
 589         icalcomponent *vtodo;
 590         int created_new_vtodo = 0;
 591
 592         if (supplied_vtodo != NULL) {
 593                 vtodo = supplied_vtodo;
 594         }
 595         else {
 596                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 597                 created_new_vtodo = 1;
 598         }
 599
 600         if (!strcasecmp(bstr("sc"), "Save")) {
 601
 602                 /* Replace values in the component with ones from the form */
 603
 604                 while (prop = icalcomponent_get_first_property(vtodo,
 605                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 606                         icalcomponent_remove_property(vtodo, prop);
 607                         icalproperty_free(prop);
 608                 }
 609                 icalcomponent_add_property(vtodo,
 610                         icalproperty_new_summary(bstr("summary")));
 611
 612                 while (prop = icalcomponent_get_first_property(vtodo,
 613                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 614                         icalcomponent_remove_property(vtodo, prop);
 615                         icalproperty_free(prop);
 616                 }
 617                 icalcomponent_add_property(vtodo,
 618                         icalproperty_new_description(bstr("description")));
 619
 620                 while (prop = icalcomponent_get_first_property(vtodo,
 621                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 622                         icalcomponent_remove_property(vtodo, prop);
 623                         icalproperty_free(prop);
 624                 }
 625                 icalcomponent_add_property(vtodo,
 626                         icalproperty_new_dtstart(
 627                                 icaltime_from_webform("dtstart")
 628                         )
 629                 );
 630
 631                 while (prop = icalcomponent_get_first_property(vtodo,
 632                       ICAL_DUE_PROPERTY), prop != NULL) {
 633                         icalcomponent_remove_property(vtodo, prop);
 634                         icalproperty_free(prop);
 635                 }
 636                 icalcomponent_add_property(vtodo,
 637                         icalproperty_new_due(
 638                                 icaltime_from_webform("due")
 639                         )
 640                 );
 641
 642                 /* Serialize it and save it to the message base */
 643                 serv_puts("ENT0 1|||4");
 644                 serv_gets(buf);
 645                 if (buf[0] == '4') {
 646                         serv_puts("Content-type: text/calendar");
 647                         serv_puts("");
 648                         serv_puts(icalcomponent_as_ical_string(vtodo));
 649                         serv_puts("000");
 650
 651                         /* Probably not necessary; the server will see the UID
 652                          * of the object and delete the old one anyway, but
 653                          * just in case...
 654                          */
 655                         delete_existing = 1;
 656                 }
 657         }
 658
 659         /*
 660          * If the user clicked 'Delete' then explicitly delete the message.
 661          */
 662         if (!strcasecmp(bstr("sc"), "Delete")) {
 663                 delete_existing = 1;
 664         }
 665
 666         if ( (delete_existing) && (msgnum > 0L) ) {
 667                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 668                 serv_gets(buf);
 669         }
 670
 671         if (created_new_vtodo) {
 672                 icalcomponent_free(vtodo);
 673         }
 674
 675         /* Go back to the task list */
 676         readloop("readfwd");
 677 }
 678
 679
 680
 681 /*
 682  * Code common to all display handlers.  Given a message number and a MIME
 683  * type, we load the message and hunt for that MIME type.  If found, we load
 684  * the relevant part, deserialize it into a libical component, filter it for
 685  * the requested object type, and feed it to the specified handler.
 686  */
 687 void display_using_handler(long msgnum,
 688                         char *mimetype,
 689                         icalcomponent_kind which_kind,
 690                         void (*callback)(icalcomponent *, long)
 691         ) {
 692         char buf[SIZ];
 693         char mime_partnum[SIZ];
 694         char mime_filename[SIZ];
 695         char mime_content_type[SIZ];
 696         char mime_disposition[SIZ];
 697         int mime_length;
 698         char relevant_partnum[SIZ];
 699         char *relevant_source = NULL;
 700         icalcomponent *cal, *c;
 701
 702         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 703         serv_puts(buf);
 704         serv_gets(buf);
 705         if (buf[0] != '1') return;
 706
 707         while (serv_gets(buf), strcmp(buf, "000")) {
 708                 if (!strncasecmp(buf, "part=", 5)) {
 709                         extract(mime_filename, &buf[5], 1);
 710                         extract(mime_partnum, &buf[5], 2);
 711                         extract(mime_disposition, &buf[5], 3);
 712                         extract(mime_content_type, &buf[5], 4);
 713                         mime_length = extract_int(&buf[5], 5);
 714
 715                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 716                                 strcpy(relevant_partnum, mime_partnum);
 717                         }
 718
 719                 }
 720         }
 721
 722         if (strlen(relevant_partnum) > 0) {
 723                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 724                 if (relevant_source != NULL) {
 725
 726                         cal = icalcomponent_new_from_string(relevant_source);
 727                         if (cal != NULL) {
 728
 729                                 ical_dezonify(cal);
 730
 731                                 /* Simple components of desired type */
 732                                 if (icalcomponent_isa(cal) == which_kind) {
 733                                         callback(cal, msgnum);
 734                                 }
 735
 736                                 /* Subcomponents of desired type */
 737                                 for (c = icalcomponent_get_first_component(cal,
 738                                     which_kind);
 739                                     (c != 0);
 740                                     c = icalcomponent_get_next_component(cal,
 741                                     which_kind)) {
 742                                         callback(c, msgnum);
 743                                 }
 744                                 icalcomponent_free(cal);
 745                         }
 746                         free(relevant_source);
 747                 }
 748         }
 749
 750 }
 751
 752 void display_calendar(long msgnum) {
 753         display_using_handler(msgnum, "text/calendar",
 754                                 ICAL_VEVENT_COMPONENT,
 755                                 display_individual_cal);
 756 }
 757
 758 void display_task(long msgnum) {
 759         display_using_handler(msgnum, "text/calendar",
 760                                 ICAL_VTODO_COMPONENT,
 761                                 display_individual_task);
 762 }
 763
 764 void display_edit_task(void) {
 765         long msgnum = 0L;
 766
 767         msgnum = atol(bstr("msgnum"));
 768         if (msgnum > 0L) {
 769                 /* existing task */
 770                 display_using_handler(msgnum, "text/calendar",
 771                                 ICAL_VTODO_COMPONENT,
 772                                 display_edit_individual_task);
 773         }
 774         else {
 775                 /* new task */
 776                 display_edit_individual_task(NULL, 0L);
 777         }
 778 }
 779
 780 void save_task(void) {
 781         long msgnum = 0L;
 782
 783         msgnum = atol(bstr("msgnum"));
 784         if (msgnum > 0L) {
 785                 display_using_handler(msgnum, "text/calendar",
 786                                 ICAL_VTODO_COMPONENT,
 787                                 save_individual_task);
 788         }
 789         else {
 790                 save_individual_task(NULL, 0L);
 791         }
 792 }
 793
 794 void display_edit_event(void) {
 795         long msgnum = 0L;
 796
 797         msgnum = atol(bstr("msgnum"));
 798         if (msgnum > 0L) {
 799                 /* existing event */
 800                 display_using_handler(msgnum, "text/calendar",
 801                                 ICAL_VEVENT_COMPONENT,
 802                                 display_edit_individual_event);
 803         }
 804         else {
 805                 /* new event */
 806                 display_edit_individual_event(NULL, 0L);
 807         }
 808 }
 809
 810 void save_event(void) {
 811         long msgnum = 0L;
 812
 813         msgnum = atol(bstr("msgnum"));
 814
 815         if (msgnum > 0L) {
 816                 display_using_handler(msgnum, "text/calendar",
 817                                 ICAL_VEVENT_COMPONENT,
 818                                 save_individual_event);
 819         }
 820         else {
 821                 save_individual_event(NULL, 0L);
 822         }
 823 }
 824
 825 #endif /* HAVE_ICAL_H */