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[SIZ];
  68         char conflict_name[SIZ];
  69         int is_update = 0;
  70
  71         /* Leading HTML for the display of this object */
  72         if (recursion_level == 0) {
  73                 wprintf("<CENTER><TABLE border=0>\n");
  74         }
  75
  76         /* Look for a method */
  77         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  78
  79         /* See what we need to do with this */
  80         if (method != NULL) {
  81                 the_method = icalproperty_get_method(method);
  82                 switch(the_method) {
  83                     case ICAL_METHOD_REQUEST:
  84                         wprintf("<TR><TD COLSPAN=2>\n"
  85                                 "<IMG ALIGN=CENTER "
  86                                 "SRC=\"/static/calarea_48x.gif\">"
  87                                 "&nbsp;&nbsp;"
  88                                 "<B>Meeting invitation</B>"
  89                                 "</TD></TR>\n"
  90                         );
  91                         break;
  92                     case ICAL_METHOD_REPLY:
  93                         wprintf("<TR><TD COLSPAN=2>\n"
  94                                 "<IMG ALIGN=CENTER "
  95                                 "SRC=\"/static/calarea_48x.gif\">"
  96                                 "&nbsp;&nbsp;"
  97                                 "<B>Attendee's reply to your invitation</B>"
  98                                 "</TD></TR>\n"
  99                         );
 100                         break;
 101                     case ICAL_METHOD_PUBLISH:
 102                         wprintf("<TR><TD COLSPAN=2>\n"
 103                                 "<IMG ALIGN=CENTER "
 104                                 "SRC=\"/static/calarea_48x.gif\">"
 105                                 "&nbsp;&nbsp;"
 106                                 "<B>Published event</B>"
 107                                 "</TD></TR>\n"
 108                         );
 109                         break;
 110                     default:
 111                         wprintf("<TR><TD COLSPAN=2>"
 112                                 "I don't know what to do with this.</TD></TR>"
 113                                 "\n");
 114                         break;
 115                 }
 116         }
 117
 118         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 119         if (p != NULL) {
 120                 wprintf("<TR><TD><B>Summary:</B></TD><TD>");
 121                 escputs((char *)icalproperty_get_comment(p));
 122                 wprintf("</TD></TR>\n");
 123         }
 124
 125         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 126         if (p != NULL) {
 127                 wprintf("<TR><TD><B>Location:</B></TD><TD>");
 128                 escputs((char *)icalproperty_get_comment(p));
 129                 wprintf("</TD></TR>\n");
 130         }
 131
 132         /*
 133          * Only show start/end times if we're actually looking at the VEVENT
 134          * component.  Otherwise it shows bogus dates for things like timezone.
 135          */
 136         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 137
 138                 p = icalcomponent_get_first_property(cal,
 139                                                 ICAL_DTSTART_PROPERTY);
 140                 if (p != NULL) {
 141                         t = icalproperty_get_dtstart(p);
 142
 143                         if (t.is_date) {
 144                                 wprintf("<TR><TD><B>Date:"
 145                                         "</B></TD><TD>"
 146                                         "%s %d, %d</TD></TR>",
 147                                         months[t.month - 1],
 148                                         t.day, t.year
 149                                 );
 150                         }
 151                         else {
 152                                 tt = icaltime_as_timet(t);
 153                                 fmt_date(buf, tt, 0);
 154                                 wprintf("<TR><TD><B>Starting date/time:"
 155                                         "</B></TD><TD>"
 156                                         "%s</TD></TR>", buf
 157                                 );
 158                         }
 159                 }
 160
 161                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 162                 if (p != NULL) {
 163                         t = icalproperty_get_dtend(p);
 164                         tt = icaltime_as_timet(t);
 165                         fmt_date(buf, tt, 0);
 166                         wprintf("<TR><TD><B>Ending date/time:</B></TD><TD>"
 167                                 "%s</TD></TR>", buf
 168                         );
 169                 }
 170
 171         }
 172
 173         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 174         if (p != NULL) {
 175                 wprintf("<TR><TD><B>Description:</B></TD><TD>");
 176                 escputs((char *)icalproperty_get_comment(p));
 177                 wprintf("</TD></TR>\n");
 178         }
 179
 180         /* If the component has attendees, iterate through them. */
 181         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 182                 wprintf("<TR><TD><B>Attendee:</B></TD><TD>");
 183                 strcpy(buf, icalproperty_get_attendee(p));
 184                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 185
 186                         /* screen name or email address */
 187                         strcpy(buf, &buf[7]);
 188                         striplt(buf);
 189                         escputs(buf);
 190                         wprintf(" ");
 191
 192                         /* participant status */
 193                         partstat_as_string(buf, p);
 194                         escputs(buf);
 195                 }
 196                 wprintf("</TD></TR>\n");
 197         }
 198
 199         /* If the component has subcomponents, recurse through them. */
 200         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 201             (c != 0);
 202             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 203                 /* Recursively process subcomponent */
 204                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 205         }
 206
 207         /* If this is a REQUEST, display conflicts and buttons */
 208         if (the_method == ICAL_METHOD_REQUEST) {
 209
 210                 /* Check for conflicts */
 211                 lprintf(9, "Checking server calendar for conflicts...\n");
 212                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 213                 serv_getln(buf, sizeof buf);
 214                 if (buf[0] == '1') {
 215                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 216                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 217                                 is_update = extract_int(buf, 4);
 218                                 wprintf("<TR><TD><B><I>%s</I></B></TD>"
 219                                         "<TD>"
 220                                         "%s "
 221                                         "<I>&quot;",
 222
 223                                         (is_update ?
 224                                                 "Update:" :
 225                                                 "CONFLICT:"
 226                                         ),
 227
 228                                         (is_update ?
 229                                                 "This is an update of" :
 230                                                 "This event would conflict with"
 231                                         )
 232
 233                                 );
 234                                 escputs(conflict_name);
 235                                 wprintf("&quot;</I> "
 236                                         "which is already in your calendar."
 237                                         "</TD></TR>\n");
 238                         }
 239                 }
 240                 lprintf(9, "...done.\n");
 241
 242                 /* Display the Accept/Decline buttons */
 243                 wprintf("<TR><TD>How would you like to respond to this invitation?</td>"
 244                         "<td><FONT SIZE=+1>"
 245                         "<A HREF=\"/respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Accept\">Accept</a>"
 246                         " | "
 247                         "<A HREF=\"/respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Tentative\">Tentative</a>"
 248                         " | "
 249                         "<A HREF=\"/respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Decline\">Decline</a>"
 250                         "</FONT></TD></TR>\n",
 251                         msgnum, cal_partnum,
 252                         msgnum, cal_partnum,
 253                         msgnum, cal_partnum
 254                 );
 255
 256         }
 257
 258         /* If this is a REPLY, display update button */
 259         if (the_method == ICAL_METHOD_REPLY) {
 260
 261                 /***********
 262                  * In the future, if we want to validate this object before
 263                  * continuing, we can do it this way:
 264                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 265                 serv_getln(buf, sizeof buf);
 266                 }
 267                  ***********/
 268
 269                 /* Display the update buttons */
 270                 wprintf("<TR><TD>"
 271                         "Click <i>Update</i> to accept this reply and "
 272                         "update your calendar."
 273                         "</td><td><font size=+1>"
 274                         "<a href=\"/handle_rsvp?msgnum=%ld&cal_partnum=%s&sc=Update\">Update</a>"
 275                         " | "
 276                         "<a href=\"/handle_rsvp?msgnum=%ld&cal_partnum=%s&sc=Ignore\">Ignore</a>"
 277                         "</font>"
 278                         "</TD></TR>\n",
 279                         msgnum, cal_partnum,
 280                         msgnum, cal_partnum
 281                 );
 282
 283         }
 284
 285         /* Trailing HTML for the display of this object */
 286         if (recursion_level == 0) {
 287
 288                 wprintf("</TR></TABLE></CENTER>\n");
 289         }
 290 }
 291
 292
 293 /*
 294  * Deserialize a calendar object in a message so it can be processed.
 295  * (This is the main entry point for these things)
 296  */
 297 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 298         icalcomponent *cal;
 299
 300         cal = icalcomponent_new_from_string(part_source);
 301
 302         if (cal == NULL) {
 303                 wprintf("Error parsing calendar object<br />\n");
 304                 return;
 305         }
 306
 307         ical_dezonify(cal);
 308         cal_process_object(cal, 0, msgnum, cal_partnum);
 309
 310         /* Free the memory we obtained from libical's constructor */
 311         icalcomponent_free(cal);
 312 }
 313
 314
 315
 316
 317 /*
 318  * Respond to a meeting request
 319  */
 320 void respond_to_request(void) {
 321         char buf[SIZ];
 322
 323         output_headers(1, 1, 2, 0, 0, 0, 0);
 324
 325         wprintf("<div id=\"banner\">\n");
 326         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 327                 "<SPAN CLASS=\"titlebar\">Respond to meeting request</SPAN>"
 328                 "</TD></TR></TABLE>\n"
 329         );
 330         wprintf("</div>\n<div id=\"content\">\n");
 331
 332         serv_printf("ICAL respond|%s|%s|%s|",
 333                 bstr("msgnum"),
 334                 bstr("cal_partnum"),
 335                 bstr("sc")
 336         );
 337         serv_getln(buf, sizeof buf);
 338
 339         if (buf[0] == '2') {
 340                 wprintf("<TABLE BORDER=0><TR><TD>"
 341                         "<IMG SRC=\"static/calarea_48x.gif\" ALIGN=CENTER>"
 342                         "</TD><TD>"
 343                 );
 344                 if (!strcasecmp(bstr("sc"), "accept")) {
 345                         wprintf("You have accepted this meeting invitation.  "
 346                                 "It has been entered into your calendar, "
 347                         );
 348                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 349                         wprintf("You have tentatively accepted this meeting invitation.  "
 350                                 "It has been 'pencilled in' to your calendar, "
 351                         );
 352                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 353                         wprintf("You have declined this meeting invitation.  "
 354                                 "It has <b>not</b> been entered into your calendar, "
 355                         );
 356                 }
 357                 wprintf("and a reply has been sent to the meeting organizer."
 358                         "</TD></TR></TABLE>\n"
 359                 );
 360         } else {
 361                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 362                         "%s\n", &buf[4]);
 363         }
 364
 365         wprintf("<A HREF=\"/dotskip?room=");
 366         urlescputs(WC->wc_roomname);
 367         wprintf("\"><br />Return to messages</A><br />\n");
 368
 369         wDumpContent(1);
 370 }
 371
 372
 373
 374 /*
 375  * Handle an incoming RSVP
 376  */
 377 void handle_rsvp(void) {
 378         char buf[SIZ];
 379
 380         output_headers(1, 1, 2, 0, 0, 0, 0);
 381
 382         wprintf("<div id=\"banner\">\n");
 383         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 384                 "<SPAN CLASS=\"titlebar\">"
 385                 "Update your calendar with this RSVP</SPAN>"
 386                 "</TD></TR></TABLE>\n"
 387                 "</div>\n<div id=\"content\">\n"
 388         );
 389
 390         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 391                 bstr("msgnum"),
 392                 bstr("cal_partnum"),
 393                 bstr("sc")
 394         );
 395         serv_getln(buf, sizeof buf);
 396
 397         if (buf[0] == '2') {
 398                 wprintf("<TABLE BORDER=0><TR><TD>"
 399                         "<IMG SRC=\"static/calarea_48x.gif\" ALIGN=CENTER>"
 400                         "</TD><TD>"
 401                 );
 402                 if (!strcasecmp(bstr("sc"), "update")) {
 403                         wprintf("Your calendar has been updated "
 404                                 "to reflect this RSVP."
 405                         );
 406                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 407                         wprintf("You have chosen to ignore this RSVP. "
 408                                 "Your calendar has <b>not</b> been updated."
 409                         );
 410                 }
 411                 wprintf("</TD></TR></TABLE>\n"
 412                 );
 413         } else {
 414                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 415                         "%s\n", &buf[4]);
 416         }
 417
 418         wprintf("<A HREF=\"/dotskip?room=");
 419         urlescputs(WC->wc_roomname);
 420         wprintf("\"><br />Return to messages</A><br />\n");
 421
 422         wDumpContent(1);
 423 }
 424
 425
 426
 427
 428 /*****************************************************************************/
 429
 430
 431
 432 /*
 433  * Display handlers for message reading
 434  */
 435
 436
 437
 438 /*
 439  * If we're reading calendar items, just store them for now.  We have to
 440  * sort and re-output them later when we draw the calendar.
 441  */
 442 void display_individual_cal(icalcomponent *cal, long msgnum) {
 443
 444         WC->num_cal += 1;
 445
 446         WC->disp_cal = realloc(WC->disp_cal,
 447                         (sizeof(struct disp_cal) * WC->num_cal) );
 448         WC->disp_cal[WC->num_cal - 1].cal = icalcomponent_new_clone(cal);
 449
 450         WC->disp_cal[WC->num_cal - 1].cal_msgnum = msgnum;
 451 }
 452
 453
 454
 455 /*
 456  * Display a task by itself (for editing)
 457  *
 458  */
 459 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 460         icalcomponent *vtodo;
 461         icalproperty *p;
 462         struct icaltimetype t;
 463         time_t now;
 464         int created_new_vtodo = 0;
 465
 466         now = time(NULL);
 467
 468         if (supplied_vtodo != NULL) {
 469                 vtodo = supplied_vtodo;
 470
 471                 /* If we're looking at a fully encapsulated VCALENDAR
 472                  * rather than a VTODO component, attempt to use the first
 473                  * relevant VTODO subcomponent.  If there is none, the
 474                  * NULL returned by icalcomponent_get_first_component() will
 475                  * tell the next iteration of this function to create a
 476                  * new one.
 477                  */
 478                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 479                         display_edit_individual_task(
 480                                 icalcomponent_get_first_component(
 481                                         vtodo, ICAL_VTODO_COMPONENT
 482                                 ), msgnum
 483                         );
 484                         return;
 485                 }
 486         }
 487         else {
 488                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 489                 created_new_vtodo = 1;
 490         }
 491
 492         output_headers(1, 1, 2, 0, 0, 0, 0);
 493         wprintf("<div id=\"banner\">\n"
 494                 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR>"
 495                 "<TD><IMG SRC=\"/static/taskmanag_48x.gif\"></TD>"
 496                 "<td><SPAN CLASS=\"titlebar\">Edit task</SPAN>"
 497                 "</TD></TR></TABLE>\n"
 498                 "</div>\n<div id=\"content\">\n"
 499         );
 500
 501         wprintf("<div id=\"fix_scrollbar_bug\">"
 502                 "<table border=0 width=100%% bgcolor=\"#ffffff\"><tr><td>");
 503
 504         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 505         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 506                 msgnum);
 507
 508         wprintf("<TABLE border=0>\n");
 509
 510         wprintf("<TR><TD>Summary:</TD><TD>"
 511                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 512                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 513         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 514         if (p != NULL) {
 515                 escputs((char *)icalproperty_get_comment(p));
 516         }
 517         wprintf("\"></TD></TR>\n");
 518
 519         wprintf("<TR><TD>Start date:</TD><TD>");
 520         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 521         if (p != NULL) {
 522                 t = icalproperty_get_dtstart(p);
 523         }
 524         else {
 525                 t = icaltime_from_timet(now, 0);
 526         }
 527         display_icaltimetype_as_webform(&t, "dtstart");
 528         wprintf("</TD></TR>\n");
 529
 530         wprintf("<TR><TD>Due date:</TD><TD>");
 531         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 532         if (p != NULL) {
 533                 t = icalproperty_get_due(p);
 534         }
 535         else {
 536                 t = icaltime_from_timet(now, 0);
 537         }
 538         display_icaltimetype_as_webform(&t, "due");
 539         wprintf("</TD></TR>\n");
 540         wprintf("<TR><TD>Description:</TD><TD>");
 541         wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
 542                 "ROWS=10 COLS=80 WIDTH=80>\n"
 543         );
 544         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 545         if (p != NULL) {
 546                 escputs((char *)icalproperty_get_comment(p));
 547         }
 548         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 549
 550         wprintf("<CENTER>"
 551                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 552                 "&nbsp;&nbsp;"
 553                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 554                 "&nbsp;&nbsp;"
 555                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 556                 "</CENTER>\n"
 557         );
 558
 559         wprintf("</FORM>\n");
 560
 561         wprintf("</td></tr></table></div>\n");
 562         wDumpContent(1);
 563
 564         if (created_new_vtodo) {
 565                 icalcomponent_free(vtodo);
 566         }
 567 }
 568
 569 /*
 570  * Save an edited task
 571  *
 572  */
 573 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 574         char buf[SIZ];
 575         int delete_existing = 0;
 576         icalproperty *prop;
 577         icalcomponent *vtodo, *encaps;
 578         int created_new_vtodo = 0;
 579         int i;
 580         int sequence = 0;
 581         struct icaltimetype t;
 582
 583         if (supplied_vtodo != NULL) {
 584                 vtodo = supplied_vtodo;
 585                 /* If we're looking at a fully encapsulated VCALENDAR
 586                  * rather than a VTODO component, attempt to use the first
 587                  * relevant VTODO subcomponent.  If there is none, the
 588                  * NULL returned by icalcomponent_get_first_component() will
 589                  * tell the next iteration of this function to create a
 590                  * new one.
 591                  */
 592                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 593                         save_individual_task(
 594                                 icalcomponent_get_first_component(
 595                                         vtodo, ICAL_VTODO_COMPONENT
 596                                 ), msgnum
 597                         );
 598                         return;
 599                 }
 600         }
 601         else {
 602                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 603                 created_new_vtodo = 1;
 604         }
 605
 606         if (!strcasecmp(bstr("sc"), "Save")) {
 607
 608                 /* Replace values in the component with ones from the form */
 609
 610                 while (prop = icalcomponent_get_first_property(vtodo,
 611                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 612                         icalcomponent_remove_property(vtodo, prop);
 613                         icalproperty_free(prop);
 614                 }
 615                 icalcomponent_add_property(vtodo,
 616                         icalproperty_new_summary(bstr("summary")));
 617
 618                 while (prop = icalcomponent_get_first_property(vtodo,
 619                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 620                         icalcomponent_remove_property(vtodo, prop);
 621                         icalproperty_free(prop);
 622                 }
 623                 icalcomponent_add_property(vtodo,
 624                         icalproperty_new_description(bstr("description")));
 625
 626                 while (prop = icalcomponent_get_first_property(vtodo,
 627                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 628                         icalcomponent_remove_property(vtodo, prop);
 629                         icalproperty_free(prop);
 630                 }
 631                 icaltime_from_webform(&t, "dtstart");
 632                 icalcomponent_add_property(vtodo,
 633                         icalproperty_new_dtstart(t)
 634                 );
 635
 636                 while (prop = icalcomponent_get_first_property(vtodo,
 637                       ICAL_DUE_PROPERTY), prop != NULL) {
 638                         icalcomponent_remove_property(vtodo, prop);
 639                         icalproperty_free(prop);
 640                 }
 641                 icaltime_from_webform(&t, "due");
 642                 icalcomponent_add_property(vtodo,
 643                         icalproperty_new_due(t)
 644                 );
 645
 646                 /* Give this task a UID if it doesn't have one. */
 647                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 648                 if (icalcomponent_get_first_property(vtodo,
 649                    ICAL_UID_PROPERTY) == NULL) {
 650                         generate_uuid(buf);
 651                         icalcomponent_add_property(vtodo,
 652                                 icalproperty_new_uid(buf)
 653                         );
 654                 }
 655
 656                 /* Increment the sequence ID */
 657                 lprintf(9, "Increment the sequence ID\n");
 658                 while (prop = icalcomponent_get_first_property(vtodo,
 659                       ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 660                         i = icalproperty_get_sequence(prop);
 661                         lprintf(9, "Sequence was %d\n", i);
 662                         if (i > sequence) sequence = i;
 663                         icalcomponent_remove_property(vtodo, prop);
 664                         icalproperty_free(prop);
 665                 }
 666                 ++sequence;
 667                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 668                 icalcomponent_add_property(vtodo,
 669                         icalproperty_new_sequence(sequence)
 670                 );
 671
 672                 /*
 673                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 674                  * for two reasons: one, it's easier to just free the whole thing
 675                  * when we're done instead of unbundling, but more importantly, we
 676                  * can't encapsulate something that may already be encapsulated
 677                  * somewhere else.
 678                  */
 679                 lprintf(9, "Encapsulating into full VCALENDAR component\n");
 680                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 681
 682                 /* Serialize it and save it to the message base */
 683                 serv_puts("ENT0 1|||4");
 684                 serv_getln(buf, sizeof buf);
 685                 if (buf[0] == '4') {
 686                         serv_puts("Content-type: text/calendar");
 687                         serv_puts("");
 688                         serv_puts(icalcomponent_as_ical_string(encaps));
 689                         serv_puts("000");
 690
 691                         /* Probably not necessary; the server will see the UID
 692                          * of the object and delete the old one anyway, but
 693                          * just in case...
 694                          */
 695                         delete_existing = 1;
 696                 }
 697                 icalcomponent_free(encaps);
 698         }
 699
 700         /*
 701          * If the user clicked 'Delete' then explicitly delete the message.
 702          */
 703         if (!strcasecmp(bstr("sc"), "Delete")) {
 704                 delete_existing = 1;
 705         }
 706
 707         if ( (delete_existing) && (msgnum > 0L) ) {
 708                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 709                 serv_getln(buf, sizeof buf);
 710         }
 711
 712         if (created_new_vtodo) {
 713                 icalcomponent_free(vtodo);
 714         }
 715
 716         /* Go back to the task list */
 717         readloop("readfwd");
 718 }
 719
 720
 721
 722 /*
 723  * Code common to all display handlers.  Given a message number and a MIME
 724  * type, we load the message and hunt for that MIME type.  If found, we load
 725  * the relevant part, deserialize it into a libical component, filter it for
 726  * the requested object type, and feed it to the specified handler.
 727  *
 728  */
 729 void display_using_handler(long msgnum,
 730                         char *mimetype,
 731                         icalcomponent_kind which_kind,
 732                         void (*callback)(icalcomponent *, long)
 733         ) {
 734         char buf[SIZ];
 735         char mime_partnum[SIZ];
 736         char mime_filename[SIZ];
 737         char mime_content_type[SIZ];
 738         char mime_disposition[SIZ];
 739         int mime_length;
 740         char relevant_partnum[SIZ];
 741         char *relevant_source = NULL;
 742         icalcomponent *cal, *c;
 743
 744         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 745         serv_puts(buf);
 746         serv_getln(buf, sizeof buf);
 747         if (buf[0] != '1') return;
 748
 749         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 750                 if (!strncasecmp(buf, "part=", 5)) {
 751                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 752                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 753                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 754                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 755                         mime_length = extract_int(&buf[5], 5);
 756
 757                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 758                                 strcpy(relevant_partnum, mime_partnum);
 759                         }
 760
 761                 }
 762         }
 763
 764         if (strlen(relevant_partnum) > 0) {
 765                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 766                 if (relevant_source != NULL) {
 767
 768                         cal = icalcomponent_new_from_string(relevant_source);
 769                         if (cal != NULL) {
 770
 771                                 ical_dezonify(cal);
 772
 773                                 /* Simple components of desired type */
 774                                 if (icalcomponent_isa(cal) == which_kind) {
 775                                         callback(cal, msgnum);
 776                                 }
 777
 778                                 /* Subcomponents of desired type */
 779                                 for (c = icalcomponent_get_first_component(cal,
 780                                     which_kind);
 781                                     (c != 0);
 782                                     c = icalcomponent_get_next_component(cal,
 783                                     which_kind)) {
 784                                         callback(c, msgnum);
 785                                 }
 786                                 icalcomponent_free(cal);
 787                         }
 788                         free(relevant_source);
 789                 }
 790         }
 791
 792 }
 793
 794 void display_calendar(long msgnum) {
 795         display_using_handler(msgnum, "text/calendar",
 796                                 ICAL_VEVENT_COMPONENT,
 797                                 display_individual_cal);
 798 }
 799
 800 void display_task(long msgnum) {
 801         display_using_handler(msgnum, "text/calendar",
 802                                 ICAL_VTODO_COMPONENT,
 803                                 display_individual_cal);
 804 }
 805
 806 void display_edit_task(void) {
 807         long msgnum = 0L;
 808
 809         /* Force change the room if we have to */
 810         if (strlen(bstr("taskrm")) > 0) {
 811                 gotoroom(bstr("taskrm"));
 812         }
 813
 814         msgnum = atol(bstr("msgnum"));
 815         if (msgnum > 0L) {
 816                 /* existing task */
 817                 display_using_handler(msgnum, "text/calendar",
 818                                 ICAL_VTODO_COMPONENT,
 819                                 display_edit_individual_task);
 820         }
 821         else {
 822                 /* new task */
 823                 display_edit_individual_task(NULL, 0L);
 824         }
 825 }
 826
 827 void save_task(void) {
 828         long msgnum = 0L;
 829
 830         msgnum = atol(bstr("msgnum"));
 831         if (msgnum > 0L) {
 832                 display_using_handler(msgnum, "text/calendar",
 833                                 ICAL_VTODO_COMPONENT,
 834                                 save_individual_task);
 835         }
 836         else {
 837                 save_individual_task(NULL, 0L);
 838         }
 839 }
 840
 841 void display_edit_event(void) {
 842         long msgnum = 0L;
 843
 844         msgnum = atol(bstr("msgnum"));
 845         if (msgnum > 0L) {
 846                 /* existing event */
 847                 display_using_handler(msgnum, "text/calendar",
 848                                 ICAL_VEVENT_COMPONENT,
 849                                 display_edit_individual_event);
 850         }
 851         else {
 852                 /* new event */
 853                 display_edit_individual_event(NULL, 0L);
 854         }
 855 }
 856
 857 void save_event(void) {
 858         long msgnum = 0L;
 859
 860         msgnum = atol(bstr("msgnum"));
 861
 862         if (msgnum > 0L) {
 863                 display_using_handler(msgnum, "text/calendar",
 864                                 ICAL_VEVENT_COMPONENT,
 865                                 save_individual_event);
 866         }
 867         else {
 868                 save_individual_event(NULL, 0L);
 869         }
 870 }
 871
 872
 873
 874
 875
 876 /*
 877  * freebusy display (for client software)
 878  */
 879 void do_freebusy(char *req) {
 880         char who[SIZ];
 881         char buf[SIZ];
 882         char *fb;
 883
 884         extract_token(who, req, 1, ' ', sizeof who);
 885         if (!strncasecmp(who, "/freebusy/", 10)) {
 886                 strcpy(who, &who[10]);
 887         }
 888         unescape_input(who);
 889
 890         if ( (!strcasecmp(&who[strlen(who)-4], ".vcf"))
 891            || (!strcasecmp(&who[strlen(who)-4], ".ifb"))
 892            || (!strcasecmp(&who[strlen(who)-4], ".vfb")) ) {
 893                 who[strlen(who)-4] = 0;
 894         }
 895
 896         lprintf(9, "freebusy requested for <%s>\n", who);
 897         serv_printf("ICAL freebusy|%s", who);
 898         serv_getln(buf, sizeof buf);
 899
 900         if (buf[0] != '1') {
 901                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 902                 output_headers(0, 0, 0, 0, 0, 0, 0);
 903                 wprintf("Content-Type: text/plain\r\n");
 904                 wprintf("\r\n");
 905                 wprintf("%s\n", &buf[4]);
 906                 return;
 907         }
 908
 909         fb = read_server_text();
 910         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
 911         free(fb);
 912 }
 913
 914
 915
 916 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */