webcit/calendar.c

   1 /*
   2  * $Id$
   3  *
   4  * Functions which handle calendar objects and their processing/display.
   5  *
   6  */
   7
   8 #include "webcit.h"
   9 #include "webserver.h"
  10
  11 #ifndef WEBCIT_WITH_CALENDAR_SERVICE
  12
  13 /*
  14  * Handler stubs for builds with no calendar library available
  15  */
  16 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
  17
  18         wprintf(_("<I>This message contains calendaring/scheduling information,"
  19                 " but support for calendars is not available on this "
  20                 "particular system.  Please ask your system administrator to "
  21                 "install a new version of the Citadel web service with "
  22                 "calendaring enabled.</I><br />\n")
  23         );
  24
  25 }
  26
  27 void display_calendar(long msgnum) {
  28         wprintf(_("<i>"
  29                 "Cannot display calendar item.  You are seeing this error "
  30                 "because your WebCit service has not been installed with "
  31                 "calendar support.  Please contact your system administrator."
  32                 "</i><br />\n"));
  33 }
  34
  35 void display_task(long msgnum) {
  36         wprintf(_("<i>"
  37                 "Cannot display to-do item.  You are seeing this error "
  38                 "because your WebCit service has not been installed with "
  39                 "calendar support.  Please contact your system administrator."
  40                 "</i><br />\n"));
  41 }
  42
  43 #else /* WEBCIT_WITH_CALENDAR_SERVICE */
  44
  45
  46 /******   End of handler stubs.  Everything below this line is real.   ******/
  47
  48
  49
  50
  51 /*
  52  * Process a calendar object
  53  * ...at this point it's already been deserialized by cal_process_attachment()
  54  *
  55  */
  56 void cal_process_object(icalcomponent *cal,
  57                         int recursion_level,
  58                         long msgnum,
  59                         char *cal_partnum
  60 ) {
  61         icalcomponent *c;
  62         icalproperty *method = NULL;
  63         icalproperty_method the_method = ICAL_METHOD_NONE;
  64         icalproperty *p;
  65         struct icaltimetype t;
  66         time_t tt;
  67         char buf[256];
  68         char conflict_name[256];
  69         char conflict_message[256];
  70         int is_update = 0;
  71
  72         /* Leading HTML for the display of this object */
  73         if (recursion_level == 0) {
  74                 wprintf("<CENTER><TABLE border=0>\n");
  75         }
  76
  77         /* Look for a method */
  78         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  79
  80         /* See what we need to do with this */
  81         if (method != NULL) {
  82                 the_method = icalproperty_get_method(method);
  83                 switch(the_method) {
  84                     case ICAL_METHOD_REQUEST:
  85                         wprintf("<tr><td colspan=\"2\">\n"
  86                                 "<img align=\"center\" "
  87                                 "src=\"static/calarea_48x.gif\">"
  88                                 "&nbsp;&nbsp;"
  89                                 "<B>");
  90                         wprintf(_("Meeting invitation"));
  91                         wprintf("</B></TD></TR>\n");
  92                         break;
  93                     case ICAL_METHOD_REPLY:
  94                         wprintf("<TR><TD COLSPAN=2>\n"
  95                                 "<IMG ALIGN=CENTER "
  96                                 "src=\"static/calarea_48x.gif\">"
  97                                 "&nbsp;&nbsp;"
  98                                 "<B>");
  99                         wprintf(_("Attendee's reply to your invitation"));
 100                         wprintf("</B></TD></TR>\n");
 101                         break;
 102                     case ICAL_METHOD_PUBLISH:
 103                         wprintf("<TR><TD COLSPAN=2>\n"
 104                                 "<IMG ALIGN=CENTER "
 105                                 "src=\"static/calarea_48x.gif\">"
 106                                 "&nbsp;&nbsp;"
 107                                 "<B>");
 108                         wprintf(_("Published event"));
 109                         wprintf("</B></TD></TR>\n");
 110                         break;
 111                     default:
 112                         wprintf("<TR><TD COLSPAN=2>");
 113                         wprintf(_("This is an unknown type of calendar item."));
 114                         wprintf("</TD></TR>\n");
 115                         break;
 116                 }
 117         }
 118
 119         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 120         if (p != NULL) {
 121                 wprintf("<TR><TD><B>");
 122                 wprintf(_("Summary:"));
 123                 wprintf("</B></TD><TD>");
 124                 escputs((char *)icalproperty_get_comment(p));
 125                 wprintf("</TD></TR>\n");
 126         }
 127
 128         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 129         if (p != NULL) {
 130                 wprintf("<TR><TD><B>");
 131                 wprintf(_("Location:"));
 132                 wprintf("</B></TD><TD>");
 133                 escputs((char *)icalproperty_get_comment(p));
 134                 wprintf("</TD></TR>\n");
 135         }
 136
 137         /*
 138          * Only show start/end times if we're actually looking at the VEVENT
 139          * component.  Otherwise it shows bogus dates for things like timezone.
 140          */
 141         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 142
 143                 p = icalcomponent_get_first_property(cal,
 144                                                 ICAL_DTSTART_PROPERTY);
 145                 if (p != NULL) {
 146                         t = icalproperty_get_dtstart(p);
 147
 148                         if (t.is_date) {
 149                                 wprintf("<TR><TD><B>");
 150                                 wprintf(_("Date:"));
 151                                 wprintf("</B></TD><TD>"
 152                                         "%s %d, %d</TD></TR>",
 153                                         months[t.month - 1],
 154                                         t.day, t.year
 155                                 );
 156                         }
 157                         else {
 158                                 tt = icaltime_as_timet(t);
 159                                 fmt_date(buf, tt, 0);
 160                                 wprintf("<TR><TD><B>");
 161                                 wprintf(_("Starting date/time:"));
 162                                 wprintf("</B></TD><TD>%s</TD></TR>", buf);
 163                         }
 164                 }
 165
 166                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 167                 if (p != NULL) {
 168                         t = icalproperty_get_dtend(p);
 169                         tt = icaltime_as_timet(t);
 170                         fmt_date(buf, tt, 0);
 171                         wprintf("<TR><TD><B>");
 172                         wprintf(_("Ending date/time:"));
 173                         wprintf("</B></TD><TD>%s</TD></TR>", buf);
 174                 }
 175
 176         }
 177
 178         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 179         if (p != NULL) {
 180                 wprintf("<TR><TD><B>");
 181                 wprintf(_("Description:"));
 182                 wprintf("</B></TD><TD>");
 183                 escputs((char *)icalproperty_get_comment(p));
 184                 wprintf("</TD></TR>\n");
 185         }
 186
 187         /* If the component has attendees, iterate through them. */
 188         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 189                 wprintf("<TR><TD><B>");
 190                 wprintf(_("Attendee:"));
 191                 wprintf("</B></TD><TD>");
 192                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
 193                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 194
 195                         /* screen name or email address */
 196                         strcpy(buf, &buf[7]);
 197                         striplt(buf);
 198                         escputs(buf);
 199                         wprintf(" ");
 200
 201                         /* participant status */
 202                         partstat_as_string(buf, p);
 203                         escputs(buf);
 204                 }
 205                 wprintf("</TD></TR>\n");
 206         }
 207
 208         /* If the component has subcomponents, recurse through them. */
 209         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 210             (c != 0);
 211             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 212                 /* Recursively process subcomponent */
 213                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 214         }
 215
 216         /* If this is a REQUEST, display conflicts and buttons */
 217         if (the_method == ICAL_METHOD_REQUEST) {
 218
 219                 /* Check for conflicts */
 220                 lprintf(9, "Checking server calendar for conflicts...\n");
 221                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 222                 serv_getln(buf, sizeof buf);
 223                 if (buf[0] == '1') {
 224                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 225                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 226                                 is_update = extract_int(buf, 4);
 227
 228                                 if (is_update) {
 229                                         snprintf(conflict_message, sizeof conflict_message,
 230                                                 _("This is an update of '%s' which is already in your calendar."), conflict_name);
 231                                 }
 232                                 else {
 233                                         snprintf(conflict_message, sizeof conflict_message,
 234                                                 _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
 235                                 }
 236
 237                                 wprintf("<TR><TD><B><I>%s</I></B></TD><td>",
 238                                         (is_update ?
 239                                                 _("Update:") :
 240                                                 _("CONFLICT:")
 241                                         )
 242                                 );
 243                                 escputs(conflict_message);
 244                                 wprintf("</TD></TR>\n");
 245                         }
 246                 }
 247                 lprintf(9, "...done.\n");
 248
 249                 /* Display the Accept/Decline buttons */
 250                 wprintf("<TR><TD>How would you like to respond to this invitation?</td>"
 251                         "<td><FONT SIZE=+1>"
 252                         "<a href=\"respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Accept\">%s</a>"
 253                         " | "
 254                         "<a href=\"respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Tentative\">%s</a>"
 255                         " | "
 256                         "<a href=\"respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Decline\">%s</a>"
 257                         "</FONT></TD></TR>\n",
 258                         msgnum, cal_partnum, _("Accept"),
 259                         msgnum, cal_partnum, _("Tentative"),
 260                         msgnum, cal_partnum, _("Decline")
 261                 );
 262
 263         }
 264
 265         /* If this is a REPLY, display update button */
 266         if (the_method == ICAL_METHOD_REPLY) {
 267
 268                 /***********
 269                  * In the future, if we want to validate this object before
 270                  * continuing, we can do it this way:
 271                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 272                 serv_getln(buf, sizeof buf);
 273                 }
 274                  ***********/
 275
 276                 /* Display the update buttons */
 277                 wprintf("<TR><TD>"
 278                         "%s"
 279                         "</td><td><font size=+1>"
 280                         "<a href=\"handle_rsvp?msgnum=%ld&cal_partnum=%s&sc=Update\">%s</a>"
 281                         " | "
 282                         "<a href=\"handle_rsvp?msgnum=%ld&cal_partnum=%s&sc=Ignore\">%s</a>"
 283                         "</font>"
 284                         "</TD></TR>\n",
 285                         _("Click <i>Update</i> to accept this reply and update your calendar."),
 286                         msgnum, cal_partnum, _("Update"),
 287                         msgnum, cal_partnum, _("Ignore")
 288                 );
 289
 290         }
 291
 292         /* Trailing HTML for the display of this object */
 293         if (recursion_level == 0) {
 294
 295                 wprintf("</TR></TABLE></CENTER>\n");
 296         }
 297 }
 298
 299
 300 /*
 301  * Deserialize a calendar object in a message so it can be processed.
 302  * (This is the main entry point for these things)
 303  */
 304 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 305         icalcomponent *cal;
 306
 307         cal = icalcomponent_new_from_string(part_source);
 308
 309         if (cal == NULL) {
 310                 wprintf(_("There was an error parsing this calendar item."));
 311                 wprintf("<br />\n");
 312                 return;
 313         }
 314
 315         ical_dezonify(cal);
 316         cal_process_object(cal, 0, msgnum, cal_partnum);
 317
 318         /* Free the memory we obtained from libical's constructor */
 319         icalcomponent_free(cal);
 320 }
 321
 322
 323
 324
 325 /*
 326  * Respond to a meeting request
 327  */
 328 void respond_to_request(void) {
 329         char buf[SIZ];
 330
 331         output_headers(1, 1, 2, 0, 0, 0);
 332
 333         wprintf("<div id=\"banner\">\n");
 334         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 335                 "<SPAN CLASS=\"titlebar\">");
 336         wprintf(_("Respond to meeting request"));
 337         wprintf("</SPAN>"
 338                 "</TD></TR></TABLE>\n"
 339         );
 340         wprintf("</div>\n<div id=\"content\">\n");
 341
 342         serv_printf("ICAL respond|%s|%s|%s|",
 343                 bstr("msgnum"),
 344                 bstr("cal_partnum"),
 345                 bstr("sc")
 346         );
 347         serv_getln(buf, sizeof buf);
 348
 349         if (buf[0] == '2') {
 350                 wprintf("<TABLE BORDER=0><TR><TD>"
 351                         "<img src=\"static/calarea_48x.gif\" ALIGN=CENTER>"
 352                         "</TD><TD>"
 353                 );
 354                 if (!strcasecmp(bstr("sc"), "accept")) {
 355                         wprintf(_("You have accepted this meeting invitation.  "
 356                                 "It has been entered into your calendar.")
 357                         );
 358                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 359                         wprintf(_("You have tentatively accepted this meeting invitation.  "
 360                                 "It has been 'pencilled in' to your calendar.")
 361                         );
 362                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 363                         wprintf(_("You have declined this meeting invitation.  "
 364                                 "It has <b>not</b> been entered into your calendar.")
 365                         );
 366                 }
 367                 wprintf(" ");
 368                 wprintf(_("A reply has been sent to the meeting organizer."));
 369                 wprintf("</TD></TR></TABLE>\n");
 370         } else {
 371                 wprintf("<img src=\"static/error.gif\" ALIGN=CENTER>"
 372                         "%s\n", &buf[4]);
 373         }
 374
 375         wprintf("<a href=\"dotskip?room=");
 376         urlescputs(WC->wc_roomname);
 377         wprintf("\"><br />");
 378         wprintf(_("Return to messages"));
 379         wprintf("</A><br />\n");
 380
 381         wDumpContent(1);
 382 }
 383
 384
 385
 386 /*
 387  * Handle an incoming RSVP
 388  */
 389 void handle_rsvp(void) {
 390         char buf[SIZ];
 391
 392         output_headers(1, 1, 2, 0, 0, 0);
 393
 394         wprintf("<div id=\"banner\">\n");
 395         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 396                 "<SPAN CLASS=\"titlebar\">");
 397         wprintf(_("Update your calendar with this RSVP"));
 398         wprintf("</SPAN>"
 399                 "</TD></TR></TABLE>\n"
 400                 "</div>\n<div id=\"content\">\n"
 401         );
 402
 403         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 404                 bstr("msgnum"),
 405                 bstr("cal_partnum"),
 406                 bstr("sc")
 407         );
 408         serv_getln(buf, sizeof buf);
 409
 410         if (buf[0] == '2') {
 411                 wprintf("<TABLE BORDER=0><TR><TD>"
 412                         "<img src=\"static/calarea_48x.gif\" ALIGN=CENTER>"
 413                         "</TD><TD>"
 414                 );
 415                 if (!strcasecmp(bstr("sc"), "update")) {
 416                         wprintf(_("Your calendar has been updated to reflect this RSVP."));
 417                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 418                         wprintf(_("You have chosen to ignore this RSVP. "
 419                                 "Your calendar has <b>not</b> been updated.")
 420                         );
 421                 }
 422                 wprintf("</TD></TR></TABLE>\n"
 423                 );
 424         } else {
 425                 wprintf("<img src=\"static/error.gif\" ALIGN=CENTER>"
 426                         "%s\n", &buf[4]);
 427         }
 428
 429         wprintf("<a href=\"dotskip?room=");
 430         urlescputs(WC->wc_roomname);
 431         wprintf("\"><br />");
 432         wprintf(_("Return to messages"));
 433         wprintf("</A><br />\n");
 434
 435         wDumpContent(1);
 436 }
 437
 438
 439
 440
 441 /*****************************************************************************/
 442
 443
 444
 445 /*
 446  * Display handlers for message reading
 447  */
 448
 449
 450
 451 /*
 452  * If we're reading calendar items, just store them for now.  We have to
 453  * sort and re-output them later when we draw the calendar.
 454  */
 455 void display_individual_cal(icalcomponent *cal, long msgnum) {
 456
 457         WC->num_cal += 1;
 458
 459         WC->disp_cal = realloc(WC->disp_cal,
 460                         (sizeof(struct disp_cal) * WC->num_cal) );
 461         WC->disp_cal[WC->num_cal - 1].cal = icalcomponent_new_clone(cal);
 462
 463         WC->disp_cal[WC->num_cal - 1].cal_msgnum = msgnum;
 464 }
 465
 466
 467
 468 /*
 469  * Display a task by itself (for editing)
 470  *
 471  */
 472 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 473         icalcomponent *vtodo;
 474         icalproperty *p;
 475         struct icaltimetype t;
 476         time_t now;
 477         int created_new_vtodo = 0;
 478
 479         now = time(NULL);
 480
 481         if (supplied_vtodo != NULL) {
 482                 vtodo = supplied_vtodo;
 483
 484                 /* If we're looking at a fully encapsulated VCALENDAR
 485                  * rather than a VTODO component, attempt to use the first
 486                  * relevant VTODO subcomponent.  If there is none, the
 487                  * NULL returned by icalcomponent_get_first_component() will
 488                  * tell the next iteration of this function to create a
 489                  * new one.
 490                  */
 491                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 492                         display_edit_individual_task(
 493                                 icalcomponent_get_first_component(
 494                                         vtodo, ICAL_VTODO_COMPONENT
 495                                 ), msgnum
 496                         );
 497                         return;
 498                 }
 499         }
 500         else {
 501                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 502                 created_new_vtodo = 1;
 503         }
 504
 505         output_headers(1, 1, 2, 0, 0, 0);
 506         wprintf("<div id=\"banner\">\n"
 507                 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR>"
 508                 "<TD><img src=\"static/taskmanag_48x.gif\"></TD>"
 509                 "<td><SPAN CLASS=\"titlebar\">");
 510         wprintf(_("Edit task"));
 511         wprintf("</SPAN>"
 512                 "</TD></TR></TABLE>\n"
 513                 "</div>\n<div id=\"content\">\n"
 514         );
 515
 516         wprintf("<div id=\"fix_scrollbar_bug\">"
 517                 "<table border=0 width=100%% bgcolor=\"#ffffff\"><tr><td>");
 518
 519         wprintf("<FORM METHOD=\"POST\" action=\"save_task\">\n");
 520         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 521                 msgnum);
 522
 523         wprintf("<TABLE border=0>\n");
 524
 525         wprintf("<TR><TD>");
 526         wprintf(_("Summary:"));
 527         wprintf("</TD><TD>"
 528                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 529                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 530         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 531         if (p != NULL) {
 532                 escputs((char *)icalproperty_get_comment(p));
 533         }
 534         wprintf("\"></TD></TR>\n");
 535
 536         wprintf("<TR><TD>");
 537         wprintf(_("Start date:"));
 538         wprintf("</TD><TD>");
 539         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 540         if (p != NULL) {
 541                 t = icalproperty_get_dtstart(p);
 542         }
 543         else {
 544                 t = icaltime_from_timet(now, 0);
 545         }
 546         display_icaltimetype_as_webform(&t, "dtstart");
 547         wprintf("</TD></TR>\n");
 548
 549         wprintf("<TR><TD>");
 550         wprintf(_("Due date:"));
 551         wprintf("</TD><TD>");
 552         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 553         if (p != NULL) {
 554                 t = icalproperty_get_due(p);
 555         }
 556         else {
 557                 t = icaltime_from_timet(now, 0);
 558         }
 559         display_icaltimetype_as_webform(&t, "due");
 560         wprintf("</TD></TR>\n");
 561         wprintf("<TR><TD>");
 562         wprintf(_("Description:"));
 563         wprintf("</TD><TD>");
 564         wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
 565                 "ROWS=10 COLS=80 WIDTH=80>\n"
 566         );
 567         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 568         if (p != NULL) {
 569                 escputs((char *)icalproperty_get_comment(p));
 570         }
 571         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 572
 573         wprintf("<CENTER>"
 574                 "<INPUT TYPE=\"submit\" NAME=\"save_button\" VALUE=\"%s\">"
 575                 "&nbsp;&nbsp;"
 576                 "<INPUT TYPE=\"submit\" NAME=\"delete_button\" VALUE=\"%s\">\n"
 577                 "&nbsp;&nbsp;"
 578                 "<INPUT TYPE=\"submit\" NAME=\"cancel_button\" VALUE=\"%s\">\n"
 579                 "</CENTER>\n",
 580                 _("Save"),
 581                 _("Delete"),
 582                 _("Cancel")
 583         );
 584
 585         wprintf("</FORM>\n");
 586
 587         wprintf("</td></tr></table></div>\n");
 588         wDumpContent(1);
 589
 590         if (created_new_vtodo) {
 591                 icalcomponent_free(vtodo);
 592         }
 593 }
 594
 595 /*
 596  * Save an edited task
 597  *
 598  */
 599 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 600         char buf[SIZ];
 601         int delete_existing = 0;
 602         icalproperty *prop;
 603         icalcomponent *vtodo, *encaps;
 604         int created_new_vtodo = 0;
 605         int i;
 606         int sequence = 0;
 607         struct icaltimetype t;
 608
 609         if (supplied_vtodo != NULL) {
 610                 vtodo = supplied_vtodo;
 611                 /* If we're looking at a fully encapsulated VCALENDAR
 612                  * rather than a VTODO component, attempt to use the first
 613                  * relevant VTODO subcomponent.  If there is none, the
 614                  * NULL returned by icalcomponent_get_first_component() will
 615                  * tell the next iteration of this function to create a
 616                  * new one.
 617                  */
 618                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 619                         save_individual_task(
 620                                 icalcomponent_get_first_component(
 621                                         vtodo, ICAL_VTODO_COMPONENT
 622                                 ), msgnum
 623                         );
 624                         return;
 625                 }
 626         }
 627         else {
 628                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 629                 created_new_vtodo = 1;
 630         }
 631
 632         if (strlen(bstr("save_button")) > 0) {
 633
 634                 /* Replace values in the component with ones from the form */
 635
 636                 while (prop = icalcomponent_get_first_property(vtodo,
 637                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 638                         icalcomponent_remove_property(vtodo, prop);
 639                         icalproperty_free(prop);
 640                 }
 641                 icalcomponent_add_property(vtodo,
 642                         icalproperty_new_summary(bstr("summary")));
 643
 644                 while (prop = icalcomponent_get_first_property(vtodo,
 645                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 646                         icalcomponent_remove_property(vtodo, prop);
 647                         icalproperty_free(prop);
 648                 }
 649                 icalcomponent_add_property(vtodo,
 650                         icalproperty_new_description(bstr("description")));
 651
 652                 while (prop = icalcomponent_get_first_property(vtodo,
 653                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 654                         icalcomponent_remove_property(vtodo, prop);
 655                         icalproperty_free(prop);
 656                 }
 657                 icaltime_from_webform(&t, "dtstart");
 658                 icalcomponent_add_property(vtodo,
 659                         icalproperty_new_dtstart(t)
 660                 );
 661
 662                 while (prop = icalcomponent_get_first_property(vtodo,
 663                       ICAL_DUE_PROPERTY), prop != NULL) {
 664                         icalcomponent_remove_property(vtodo, prop);
 665                         icalproperty_free(prop);
 666                 }
 667                 icaltime_from_webform(&t, "due");
 668                 icalcomponent_add_property(vtodo,
 669                         icalproperty_new_due(t)
 670                 );
 671
 672                 /* Give this task a UID if it doesn't have one. */
 673                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 674                 if (icalcomponent_get_first_property(vtodo,
 675                    ICAL_UID_PROPERTY) == NULL) {
 676                         generate_uuid(buf);
 677                         icalcomponent_add_property(vtodo,
 678                                 icalproperty_new_uid(buf)
 679                         );
 680                 }
 681
 682                 /* Increment the sequence ID */
 683                 lprintf(9, "Increment the sequence ID\n");
 684                 while (prop = icalcomponent_get_first_property(vtodo,
 685                       ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 686                         i = icalproperty_get_sequence(prop);
 687                         lprintf(9, "Sequence was %d\n", i);
 688                         if (i > sequence) sequence = i;
 689                         icalcomponent_remove_property(vtodo, prop);
 690                         icalproperty_free(prop);
 691                 }
 692                 ++sequence;
 693                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 694                 icalcomponent_add_property(vtodo,
 695                         icalproperty_new_sequence(sequence)
 696                 );
 697
 698                 /*
 699                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 700                  * for two reasons: one, it's easier to just free the whole thing
 701                  * when we're done instead of unbundling, but more importantly, we
 702                  * can't encapsulate something that may already be encapsulated
 703                  * somewhere else.
 704                  */
 705                 lprintf(9, "Encapsulating into full VCALENDAR component\n");
 706                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 707
 708                 /* Serialize it and save it to the message base */
 709                 serv_puts("ENT0 1|||4");
 710                 serv_getln(buf, sizeof buf);
 711                 if (buf[0] == '4') {
 712                         serv_puts("Content-type: text/calendar");
 713                         serv_puts("");
 714                         serv_puts(icalcomponent_as_ical_string(encaps));
 715                         serv_puts("000");
 716
 717                         /* Probably not necessary; the server will see the UID
 718                          * of the object and delete the old one anyway, but
 719                          * just in case...
 720                          */
 721                         delete_existing = 1;
 722                 }
 723                 icalcomponent_free(encaps);
 724         }
 725
 726         /*
 727          * If the user clicked 'Delete' then explicitly delete the message.
 728          */
 729         if (strlen(bstr("delete_button")) > 0) {
 730                 delete_existing = 1;
 731         }
 732
 733         if ( (delete_existing) && (msgnum > 0L) ) {
 734                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 735                 serv_getln(buf, sizeof buf);
 736         }
 737
 738         if (created_new_vtodo) {
 739                 icalcomponent_free(vtodo);
 740         }
 741
 742         /* Go back to the task list */
 743         readloop("readfwd");
 744 }
 745
 746
 747
 748 /*
 749  * Code common to all display handlers.  Given a message number and a MIME
 750  * type, we load the message and hunt for that MIME type.  If found, we load
 751  * the relevant part, deserialize it into a libical component, filter it for
 752  * the requested object type, and feed it to the specified handler.
 753  *
 754  */
 755 void display_using_handler(long msgnum,
 756                         char *mimetype,
 757                         icalcomponent_kind which_kind,
 758                         void (*callback)(icalcomponent *, long)
 759         ) {
 760         char buf[SIZ];
 761         char mime_partnum[SIZ];
 762         char mime_filename[SIZ];
 763         char mime_content_type[SIZ];
 764         char mime_disposition[SIZ];
 765         int mime_length;
 766         char relevant_partnum[SIZ];
 767         char *relevant_source = NULL;
 768         icalcomponent *cal, *c;
 769
 770         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 771         serv_puts(buf);
 772         serv_getln(buf, sizeof buf);
 773         if (buf[0] != '1') return;
 774
 775         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 776                 if (!strncasecmp(buf, "part=", 5)) {
 777                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 778                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 779                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 780                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 781                         mime_length = extract_int(&buf[5], 5);
 782
 783                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 784                                 strcpy(relevant_partnum, mime_partnum);
 785                         }
 786
 787                 }
 788         }
 789
 790         if (strlen(relevant_partnum) > 0) {
 791                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 792                 if (relevant_source != NULL) {
 793
 794                         cal = icalcomponent_new_from_string(relevant_source);
 795                         if (cal != NULL) {
 796
 797                                 ical_dezonify(cal);
 798
 799                                 /* Simple components of desired type */
 800                                 if (icalcomponent_isa(cal) == which_kind) {
 801                                         callback(cal, msgnum);
 802                                 }
 803
 804                                 /* Subcomponents of desired type */
 805                                 for (c = icalcomponent_get_first_component(cal,
 806                                     which_kind);
 807                                     (c != 0);
 808                                     c = icalcomponent_get_next_component(cal,
 809                                     which_kind)) {
 810                                         callback(c, msgnum);
 811                                 }
 812                                 icalcomponent_free(cal);
 813                         }
 814                         free(relevant_source);
 815                 }
 816         }
 817
 818 }
 819
 820 void display_calendar(long msgnum) {
 821         display_using_handler(msgnum, "text/calendar",
 822                                 ICAL_VEVENT_COMPONENT,
 823                                 display_individual_cal);
 824 }
 825
 826 void display_task(long msgnum) {
 827         display_using_handler(msgnum, "text/calendar",
 828                                 ICAL_VTODO_COMPONENT,
 829                                 display_individual_cal);
 830 }
 831
 832 void display_edit_task(void) {
 833         long msgnum = 0L;
 834
 835         /* Force change the room if we have to */
 836         if (strlen(bstr("taskrm")) > 0) {
 837                 gotoroom(bstr("taskrm"));
 838         }
 839
 840         msgnum = atol(bstr("msgnum"));
 841         if (msgnum > 0L) {
 842                 /* existing task */
 843                 display_using_handler(msgnum, "text/calendar",
 844                                 ICAL_VTODO_COMPONENT,
 845                                 display_edit_individual_task);
 846         }
 847         else {
 848                 /* new task */
 849                 display_edit_individual_task(NULL, 0L);
 850         }
 851 }
 852
 853 void save_task(void) {
 854         long msgnum = 0L;
 855
 856         msgnum = atol(bstr("msgnum"));
 857         if (msgnum > 0L) {
 858                 display_using_handler(msgnum, "text/calendar",
 859                                 ICAL_VTODO_COMPONENT,
 860                                 save_individual_task);
 861         }
 862         else {
 863                 save_individual_task(NULL, 0L);
 864         }
 865 }
 866
 867 void display_edit_event(void) {
 868         long msgnum = 0L;
 869
 870         msgnum = atol(bstr("msgnum"));
 871         if (msgnum > 0L) {
 872                 /* existing event */
 873                 display_using_handler(msgnum, "text/calendar",
 874                                 ICAL_VEVENT_COMPONENT,
 875                                 display_edit_individual_event);
 876         }
 877         else {
 878                 /* new event */
 879                 display_edit_individual_event(NULL, 0L);
 880         }
 881 }
 882
 883 void save_event(void) {
 884         long msgnum = 0L;
 885
 886         msgnum = atol(bstr("msgnum"));
 887
 888         if (msgnum > 0L) {
 889                 display_using_handler(msgnum, "text/calendar",
 890                                 ICAL_VEVENT_COMPONENT,
 891                                 save_individual_event);
 892         }
 893         else {
 894                 save_individual_event(NULL, 0L);
 895         }
 896 }
 897
 898
 899
 900
 901
 902 /*
 903  * freebusy display (for client software)
 904  */
 905 void do_freebusy(char *req) {
 906         char who[SIZ];
 907         char buf[SIZ];
 908         char *fb;
 909
 910         extract_token(who, req, 1, ' ', sizeof who);
 911         if (!strncasecmp(who, "/freebusy/", 10)) {
 912                 strcpy(who, &who[10]);
 913         }
 914         unescape_input(who);
 915
 916         if ( (!strcasecmp(&who[strlen(who)-4], ".vcf"))
 917            || (!strcasecmp(&who[strlen(who)-4], ".ifb"))
 918            || (!strcasecmp(&who[strlen(who)-4], ".vfb")) ) {
 919                 who[strlen(who)-4] = 0;
 920         }
 921
 922         lprintf(9, "freebusy requested for <%s>\n", who);
 923         serv_printf("ICAL freebusy|%s", who);
 924         serv_getln(buf, sizeof buf);
 925
 926         if (buf[0] != '1') {
 927                 wprintf("HTTP/1.1 404 %s\n", &buf[4]);
 928                 output_headers(0, 0, 0, 0, 0, 0);
 929                 wprintf("Content-Type: text/plain\r\n");
 930                 wprintf("\r\n");
 931                 wprintf("%s\n", &buf[4]);
 932                 return;
 933         }
 934
 935         fb = read_server_text();
 936         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
 937         free(fb);
 938 }
 939
 940
 941
 942 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */