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\">Accept</a>"
 253                         " | "
 254                         "<A HREF=\"/respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Tentative\">Tentative</a>"
 255                         " | "
 256                         "<A HREF=\"/respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Decline\">Decline</a>"
 257                         "</FONT></TD></TR>\n",
 258                         msgnum, cal_partnum,
 259                         msgnum, cal_partnum,
 260                         msgnum, cal_partnum
 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                         "Click <i>Update</i> to accept this reply and "
 279                         "update your calendar."
 280                         "</td><td><font size=+1>"
 281                         "<a href=\"/handle_rsvp?msgnum=%ld&cal_partnum=%s&sc=Update\">Update</a>"
 282                         " | "
 283                         "<a href=\"/handle_rsvp?msgnum=%ld&cal_partnum=%s&sc=Ignore\">Ignore</a>"
 284                         "</font>"
 285                         "</TD></TR>\n",
 286                         msgnum, cal_partnum,
 287                         msgnum, cal_partnum
 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("Error parsing calendar object<br />\n");
 311                 return;
 312         }
 313
 314         ical_dezonify(cal);
 315         cal_process_object(cal, 0, msgnum, cal_partnum);
 316
 317         /* Free the memory we obtained from libical's constructor */
 318         icalcomponent_free(cal);
 319 }
 320
 321
 322
 323
 324 /*
 325  * Respond to a meeting request
 326  */
 327 void respond_to_request(void) {
 328         char buf[SIZ];
 329
 330         output_headers(1, 1, 2, 0, 0, 0, 0);
 331
 332         wprintf("<div id=\"banner\">\n");
 333         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 334                 "<SPAN CLASS=\"titlebar\">Respond to meeting request</SPAN>"
 335                 "</TD></TR></TABLE>\n"
 336         );
 337         wprintf("</div>\n<div id=\"content\">\n");
 338
 339         serv_printf("ICAL respond|%s|%s|%s|",
 340                 bstr("msgnum"),
 341                 bstr("cal_partnum"),
 342                 bstr("sc")
 343         );
 344         serv_getln(buf, sizeof buf);
 345
 346         if (buf[0] == '2') {
 347                 wprintf("<TABLE BORDER=0><TR><TD>"
 348                         "<IMG SRC=\"static/calarea_48x.gif\" ALIGN=CENTER>"
 349                         "</TD><TD>"
 350                 );
 351                 if (!strcasecmp(bstr("sc"), "accept")) {
 352                         wprintf("You have accepted this meeting invitation.  "
 353                                 "It has been entered into your calendar, "
 354                         );
 355                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 356                         wprintf("You have tentatively accepted this meeting invitation.  "
 357                                 "It has been 'pencilled in' to your calendar, "
 358                         );
 359                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 360                         wprintf("You have declined this meeting invitation.  "
 361                                 "It has <b>not</b> been entered into your calendar, "
 362                         );
 363                 }
 364                 wprintf("and a reply has been sent to the meeting organizer."
 365                         "</TD></TR></TABLE>\n"
 366                 );
 367         } else {
 368                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 369                         "%s\n", &buf[4]);
 370         }
 371
 372         wprintf("<A HREF=\"/dotskip?room=");
 373         urlescputs(WC->wc_roomname);
 374         wprintf("\"><br />Return to messages</A><br />\n");
 375
 376         wDumpContent(1);
 377 }
 378
 379
 380
 381 /*
 382  * Handle an incoming RSVP
 383  */
 384 void handle_rsvp(void) {
 385         char buf[SIZ];
 386
 387         output_headers(1, 1, 2, 0, 0, 0, 0);
 388
 389         wprintf("<div id=\"banner\">\n");
 390         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 391                 "<SPAN CLASS=\"titlebar\">"
 392                 "Update your calendar with this RSVP</SPAN>"
 393                 "</TD></TR></TABLE>\n"
 394                 "</div>\n<div id=\"content\">\n"
 395         );
 396
 397         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 398                 bstr("msgnum"),
 399                 bstr("cal_partnum"),
 400                 bstr("sc")
 401         );
 402         serv_getln(buf, sizeof buf);
 403
 404         if (buf[0] == '2') {
 405                 wprintf("<TABLE BORDER=0><TR><TD>"
 406                         "<IMG SRC=\"static/calarea_48x.gif\" ALIGN=CENTER>"
 407                         "</TD><TD>"
 408                 );
 409                 if (!strcasecmp(bstr("sc"), "update")) {
 410                         wprintf("Your calendar has been updated "
 411                                 "to reflect this RSVP."
 412                         );
 413                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 414                         wprintf("You have chosen to ignore this RSVP. "
 415                                 "Your calendar has <b>not</b> been updated."
 416                         );
 417                 }
 418                 wprintf("</TD></TR></TABLE>\n"
 419                 );
 420         } else {
 421                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 422                         "%s\n", &buf[4]);
 423         }
 424
 425         wprintf("<A HREF=\"/dotskip?room=");
 426         urlescputs(WC->wc_roomname);
 427         wprintf("\"><br />Return to messages</A><br />\n");
 428
 429         wDumpContent(1);
 430 }
 431
 432
 433
 434
 435 /*****************************************************************************/
 436
 437
 438
 439 /*
 440  * Display handlers for message reading
 441  */
 442
 443
 444
 445 /*
 446  * If we're reading calendar items, just store them for now.  We have to
 447  * sort and re-output them later when we draw the calendar.
 448  */
 449 void display_individual_cal(icalcomponent *cal, long msgnum) {
 450
 451         WC->num_cal += 1;
 452
 453         WC->disp_cal = realloc(WC->disp_cal,
 454                         (sizeof(struct disp_cal) * WC->num_cal) );
 455         WC->disp_cal[WC->num_cal - 1].cal = icalcomponent_new_clone(cal);
 456
 457         WC->disp_cal[WC->num_cal - 1].cal_msgnum = msgnum;
 458 }
 459
 460
 461
 462 /*
 463  * Display a task by itself (for editing)
 464  *
 465  */
 466 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 467         icalcomponent *vtodo;
 468         icalproperty *p;
 469         struct icaltimetype t;
 470         time_t now;
 471         int created_new_vtodo = 0;
 472
 473         now = time(NULL);
 474
 475         if (supplied_vtodo != NULL) {
 476                 vtodo = supplied_vtodo;
 477
 478                 /* If we're looking at a fully encapsulated VCALENDAR
 479                  * rather than a VTODO component, attempt to use the first
 480                  * relevant VTODO subcomponent.  If there is none, the
 481                  * NULL returned by icalcomponent_get_first_component() will
 482                  * tell the next iteration of this function to create a
 483                  * new one.
 484                  */
 485                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 486                         display_edit_individual_task(
 487                                 icalcomponent_get_first_component(
 488                                         vtodo, ICAL_VTODO_COMPONENT
 489                                 ), msgnum
 490                         );
 491                         return;
 492                 }
 493         }
 494         else {
 495                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 496                 created_new_vtodo = 1;
 497         }
 498
 499         output_headers(1, 1, 2, 0, 0, 0, 0);
 500         wprintf("<div id=\"banner\">\n"
 501                 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR>"
 502                 "<TD><IMG SRC=\"/static/taskmanag_48x.gif\"></TD>"
 503                 "<td><SPAN CLASS=\"titlebar\">Edit task</SPAN>"
 504                 "</TD></TR></TABLE>\n"
 505                 "</div>\n<div id=\"content\">\n"
 506         );
 507
 508         wprintf("<div id=\"fix_scrollbar_bug\">"
 509                 "<table border=0 width=100%% bgcolor=\"#ffffff\"><tr><td>");
 510
 511         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 512         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 513                 msgnum);
 514
 515         wprintf("<TABLE border=0>\n");
 516
 517         wprintf("<TR><TD>Summary:</TD><TD>"
 518                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 519                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 520         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 521         if (p != NULL) {
 522                 escputs((char *)icalproperty_get_comment(p));
 523         }
 524         wprintf("\"></TD></TR>\n");
 525
 526         wprintf("<TR><TD>Start date:</TD><TD>");
 527         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 528         if (p != NULL) {
 529                 t = icalproperty_get_dtstart(p);
 530         }
 531         else {
 532                 t = icaltime_from_timet(now, 0);
 533         }
 534         display_icaltimetype_as_webform(&t, "dtstart");
 535         wprintf("</TD></TR>\n");
 536
 537         wprintf("<TR><TD>Due date:</TD><TD>");
 538         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 539         if (p != NULL) {
 540                 t = icalproperty_get_due(p);
 541         }
 542         else {
 543                 t = icaltime_from_timet(now, 0);
 544         }
 545         display_icaltimetype_as_webform(&t, "due");
 546         wprintf("</TD></TR>\n");
 547         wprintf("<TR><TD>Description:</TD><TD>");
 548         wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
 549                 "ROWS=10 COLS=80 WIDTH=80>\n"
 550         );
 551         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 552         if (p != NULL) {
 553                 escputs((char *)icalproperty_get_comment(p));
 554         }
 555         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 556
 557         wprintf("<CENTER>"
 558                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 559                 "&nbsp;&nbsp;"
 560                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 561                 "&nbsp;&nbsp;"
 562                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 563                 "</CENTER>\n"
 564         );
 565
 566         wprintf("</FORM>\n");
 567
 568         wprintf("</td></tr></table></div>\n");
 569         wDumpContent(1);
 570
 571         if (created_new_vtodo) {
 572                 icalcomponent_free(vtodo);
 573         }
 574 }
 575
 576 /*
 577  * Save an edited task
 578  *
 579  */
 580 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 581         char buf[SIZ];
 582         int delete_existing = 0;
 583         icalproperty *prop;
 584         icalcomponent *vtodo, *encaps;
 585         int created_new_vtodo = 0;
 586         int i;
 587         int sequence = 0;
 588         struct icaltimetype t;
 589
 590         if (supplied_vtodo != NULL) {
 591                 vtodo = supplied_vtodo;
 592                 /* If we're looking at a fully encapsulated VCALENDAR
 593                  * rather than a VTODO component, attempt to use the first
 594                  * relevant VTODO subcomponent.  If there is none, the
 595                  * NULL returned by icalcomponent_get_first_component() will
 596                  * tell the next iteration of this function to create a
 597                  * new one.
 598                  */
 599                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 600                         save_individual_task(
 601                                 icalcomponent_get_first_component(
 602                                         vtodo, ICAL_VTODO_COMPONENT
 603                                 ), msgnum
 604                         );
 605                         return;
 606                 }
 607         }
 608         else {
 609                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 610                 created_new_vtodo = 1;
 611         }
 612
 613         if (!strcasecmp(bstr("sc"), "Save")) {
 614
 615                 /* Replace values in the component with ones from the form */
 616
 617                 while (prop = icalcomponent_get_first_property(vtodo,
 618                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 619                         icalcomponent_remove_property(vtodo, prop);
 620                         icalproperty_free(prop);
 621                 }
 622                 icalcomponent_add_property(vtodo,
 623                         icalproperty_new_summary(bstr("summary")));
 624
 625                 while (prop = icalcomponent_get_first_property(vtodo,
 626                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 627                         icalcomponent_remove_property(vtodo, prop);
 628                         icalproperty_free(prop);
 629                 }
 630                 icalcomponent_add_property(vtodo,
 631                         icalproperty_new_description(bstr("description")));
 632
 633                 while (prop = icalcomponent_get_first_property(vtodo,
 634                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 635                         icalcomponent_remove_property(vtodo, prop);
 636                         icalproperty_free(prop);
 637                 }
 638                 icaltime_from_webform(&t, "dtstart");
 639                 icalcomponent_add_property(vtodo,
 640                         icalproperty_new_dtstart(t)
 641                 );
 642
 643                 while (prop = icalcomponent_get_first_property(vtodo,
 644                       ICAL_DUE_PROPERTY), prop != NULL) {
 645                         icalcomponent_remove_property(vtodo, prop);
 646                         icalproperty_free(prop);
 647                 }
 648                 icaltime_from_webform(&t, "due");
 649                 icalcomponent_add_property(vtodo,
 650                         icalproperty_new_due(t)
 651                 );
 652
 653                 /* Give this task a UID if it doesn't have one. */
 654                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 655                 if (icalcomponent_get_first_property(vtodo,
 656                    ICAL_UID_PROPERTY) == NULL) {
 657                         generate_uuid(buf);
 658                         icalcomponent_add_property(vtodo,
 659                                 icalproperty_new_uid(buf)
 660                         );
 661                 }
 662
 663                 /* Increment the sequence ID */
 664                 lprintf(9, "Increment the sequence ID\n");
 665                 while (prop = icalcomponent_get_first_property(vtodo,
 666                       ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 667                         i = icalproperty_get_sequence(prop);
 668                         lprintf(9, "Sequence was %d\n", i);
 669                         if (i > sequence) sequence = i;
 670                         icalcomponent_remove_property(vtodo, prop);
 671                         icalproperty_free(prop);
 672                 }
 673                 ++sequence;
 674                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 675                 icalcomponent_add_property(vtodo,
 676                         icalproperty_new_sequence(sequence)
 677                 );
 678
 679                 /*
 680                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 681                  * for two reasons: one, it's easier to just free the whole thing
 682                  * when we're done instead of unbundling, but more importantly, we
 683                  * can't encapsulate something that may already be encapsulated
 684                  * somewhere else.
 685                  */
 686                 lprintf(9, "Encapsulating into full VCALENDAR component\n");
 687                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 688
 689                 /* Serialize it and save it to the message base */
 690                 serv_puts("ENT0 1|||4");
 691                 serv_getln(buf, sizeof buf);
 692                 if (buf[0] == '4') {
 693                         serv_puts("Content-type: text/calendar");
 694                         serv_puts("");
 695                         serv_puts(icalcomponent_as_ical_string(encaps));
 696                         serv_puts("000");
 697
 698                         /* Probably not necessary; the server will see the UID
 699                          * of the object and delete the old one anyway, but
 700                          * just in case...
 701                          */
 702                         delete_existing = 1;
 703                 }
 704                 icalcomponent_free(encaps);
 705         }
 706
 707         /*
 708          * If the user clicked 'Delete' then explicitly delete the message.
 709          */
 710         if (!strcasecmp(bstr("sc"), "Delete")) {
 711                 delete_existing = 1;
 712         }
 713
 714         if ( (delete_existing) && (msgnum > 0L) ) {
 715                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 716                 serv_getln(buf, sizeof buf);
 717         }
 718
 719         if (created_new_vtodo) {
 720                 icalcomponent_free(vtodo);
 721         }
 722
 723         /* Go back to the task list */
 724         readloop("readfwd");
 725 }
 726
 727
 728
 729 /*
 730  * Code common to all display handlers.  Given a message number and a MIME
 731  * type, we load the message and hunt for that MIME type.  If found, we load
 732  * the relevant part, deserialize it into a libical component, filter it for
 733  * the requested object type, and feed it to the specified handler.
 734  *
 735  */
 736 void display_using_handler(long msgnum,
 737                         char *mimetype,
 738                         icalcomponent_kind which_kind,
 739                         void (*callback)(icalcomponent *, long)
 740         ) {
 741         char buf[SIZ];
 742         char mime_partnum[SIZ];
 743         char mime_filename[SIZ];
 744         char mime_content_type[SIZ];
 745         char mime_disposition[SIZ];
 746         int mime_length;
 747         char relevant_partnum[SIZ];
 748         char *relevant_source = NULL;
 749         icalcomponent *cal, *c;
 750
 751         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 752         serv_puts(buf);
 753         serv_getln(buf, sizeof buf);
 754         if (buf[0] != '1') return;
 755
 756         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 757                 if (!strncasecmp(buf, "part=", 5)) {
 758                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 759                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 760                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 761                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 762                         mime_length = extract_int(&buf[5], 5);
 763
 764                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 765                                 strcpy(relevant_partnum, mime_partnum);
 766                         }
 767
 768                 }
 769         }
 770
 771         if (strlen(relevant_partnum) > 0) {
 772                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 773                 if (relevant_source != NULL) {
 774
 775                         cal = icalcomponent_new_from_string(relevant_source);
 776                         if (cal != NULL) {
 777
 778                                 ical_dezonify(cal);
 779
 780                                 /* Simple components of desired type */
 781                                 if (icalcomponent_isa(cal) == which_kind) {
 782                                         callback(cal, msgnum);
 783                                 }
 784
 785                                 /* Subcomponents of desired type */
 786                                 for (c = icalcomponent_get_first_component(cal,
 787                                     which_kind);
 788                                     (c != 0);
 789                                     c = icalcomponent_get_next_component(cal,
 790                                     which_kind)) {
 791                                         callback(c, msgnum);
 792                                 }
 793                                 icalcomponent_free(cal);
 794                         }
 795                         free(relevant_source);
 796                 }
 797         }
 798
 799 }
 800
 801 void display_calendar(long msgnum) {
 802         display_using_handler(msgnum, "text/calendar",
 803                                 ICAL_VEVENT_COMPONENT,
 804                                 display_individual_cal);
 805 }
 806
 807 void display_task(long msgnum) {
 808         display_using_handler(msgnum, "text/calendar",
 809                                 ICAL_VTODO_COMPONENT,
 810                                 display_individual_cal);
 811 }
 812
 813 void display_edit_task(void) {
 814         long msgnum = 0L;
 815
 816         /* Force change the room if we have to */
 817         if (strlen(bstr("taskrm")) > 0) {
 818                 gotoroom(bstr("taskrm"));
 819         }
 820
 821         msgnum = atol(bstr("msgnum"));
 822         if (msgnum > 0L) {
 823                 /* existing task */
 824                 display_using_handler(msgnum, "text/calendar",
 825                                 ICAL_VTODO_COMPONENT,
 826                                 display_edit_individual_task);
 827         }
 828         else {
 829                 /* new task */
 830                 display_edit_individual_task(NULL, 0L);
 831         }
 832 }
 833
 834 void save_task(void) {
 835         long msgnum = 0L;
 836
 837         msgnum = atol(bstr("msgnum"));
 838         if (msgnum > 0L) {
 839                 display_using_handler(msgnum, "text/calendar",
 840                                 ICAL_VTODO_COMPONENT,
 841                                 save_individual_task);
 842         }
 843         else {
 844                 save_individual_task(NULL, 0L);
 845         }
 846 }
 847
 848 void display_edit_event(void) {
 849         long msgnum = 0L;
 850
 851         msgnum = atol(bstr("msgnum"));
 852         if (msgnum > 0L) {
 853                 /* existing event */
 854                 display_using_handler(msgnum, "text/calendar",
 855                                 ICAL_VEVENT_COMPONENT,
 856                                 display_edit_individual_event);
 857         }
 858         else {
 859                 /* new event */
 860                 display_edit_individual_event(NULL, 0L);
 861         }
 862 }
 863
 864 void save_event(void) {
 865         long msgnum = 0L;
 866
 867         msgnum = atol(bstr("msgnum"));
 868
 869         if (msgnum > 0L) {
 870                 display_using_handler(msgnum, "text/calendar",
 871                                 ICAL_VEVENT_COMPONENT,
 872                                 save_individual_event);
 873         }
 874         else {
 875                 save_individual_event(NULL, 0L);
 876         }
 877 }
 878
 879
 880
 881
 882
 883 /*
 884  * freebusy display (for client software)
 885  */
 886 void do_freebusy(char *req) {
 887         char who[SIZ];
 888         char buf[SIZ];
 889         char *fb;
 890
 891         extract_token(who, req, 1, ' ', sizeof who);
 892         if (!strncasecmp(who, "/freebusy/", 10)) {
 893                 strcpy(who, &who[10]);
 894         }
 895         unescape_input(who);
 896
 897         if ( (!strcasecmp(&who[strlen(who)-4], ".vcf"))
 898            || (!strcasecmp(&who[strlen(who)-4], ".ifb"))
 899            || (!strcasecmp(&who[strlen(who)-4], ".vfb")) ) {
 900                 who[strlen(who)-4] = 0;
 901         }
 902
 903         lprintf(9, "freebusy requested for <%s>\n", who);
 904         serv_printf("ICAL freebusy|%s", who);
 905         serv_getln(buf, sizeof buf);
 906
 907         if (buf[0] != '1') {
 908                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 909                 output_headers(0, 0, 0, 0, 0, 0, 0);
 910                 wprintf("Content-Type: text/plain\r\n");
 911                 wprintf("\r\n");
 912                 wprintf("%s\n", &buf[4]);
 913                 return;
 914         }
 915
 916         fb = read_server_text();
 917         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
 918         free(fb);
 919 }
 920
 921
 922
 923 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */