webcit/calendar.c

   1 /*
   2  * $Id$
   3  *
   4  * Functions which handle calendar objects and their processing/display.
   5  *
   6  */
   7
   8 #include <ctype.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <sys/types.h>
  15 #include <sys/wait.h>
  16 #include <sys/socket.h>
  17 #include <limits.h>
  18 #include <netinet/in.h>
  19 #include <netdb.h>
  20 #include <string.h>
  21 #include <pwd.h>
  22 #include <errno.h>
  23 #include <stdarg.h>
  24 #include <pthread.h>
  25 #include <signal.h>
  26 #include <time.h>
  27 #include "webcit.h"
  28 #include "webserver.h"
  29
  30 #ifndef WEBCIT_WITH_CALENDAR_SERVICE
  31
  32 /*
  33  * Handler stubs for builds with no calendar library available
  34  */
  35 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
  36
  37         wprintf("<I>This message contains calendaring/scheduling information,"
  38                 " but support for calendars is not available on this "
  39                 "particular system.  Please ask your system administrator to "
  40                 "install a new version of the Citadel web service with "
  41                 "calendaring enabled.</I><BR>\n"
  42         );
  43
  44 }
  45
  46 void display_calendar(long msgnum) {
  47         wprintf("<i>"
  48                 "Cannot display calendar item.  You are seeing this error "
  49                 "because your WebCit service has not been installed with "
  50                 "calendar support.  Please contact your system administrator."
  51                 "</i><br>\n");
  52 }
  53
  54 void display_task(long msgnum) {
  55         wprintf("<i>"
  56                 "Cannot display to-do item.  You are seeing this error "
  57                 "because your WebCit service has not been installed with "
  58                 "calendar support.  Please contact your system administrator."
  59                 "</i><br>\n");
  60 }
  61
  62 #else /* WEBCIT_WITH_CALENDAR_SERVICE */
  63
  64
  65 /******   End of handler stubs.  Everything below this line is real.   ******/
  66
  67
  68
  69
  70 /*
  71  * Process a calendar object
  72  * ...at this point it's already been deserialized by cal_process_attachment()
  73  *
  74  */
  75 void cal_process_object(icalcomponent *cal,
  76                         int recursion_level,
  77                         long msgnum,
  78                         char *cal_partnum
  79 ) {
  80         icalcomponent *c;
  81         icalproperty *method = NULL;
  82         icalproperty_method the_method = ICAL_METHOD_NONE;
  83         icalproperty *p;
  84         struct icaltimetype t;
  85         time_t tt;
  86         char buf[SIZ];
  87         char conflict_name[SIZ];
  88         int is_update = 0;
  89
  90         /* Leading HTML for the display of this object */
  91         if (recursion_level == 0) {
  92                 wprintf("<CENTER><TABLE border=0>\n");
  93         }
  94
  95         /* Look for a method */
  96         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  97
  98         /* See what we need to do with this */
  99         if (method != NULL) {
 100                 the_method = icalproperty_get_method(method);
 101                 switch(the_method) {
 102                     case ICAL_METHOD_REQUEST:
 103                         wprintf("<TR><TD COLSPAN=2>\n"
 104                                 "<IMG ALIGN=CENTER "
 105                                 "SRC=\"/static/vcalendar.gif\">"
 106                                 "&nbsp;&nbsp;"
 107                                 "<B>Meeting invitation</B>"
 108                                 "</TD></TR>\n"
 109                         );
 110                         break;
 111                     case ICAL_METHOD_REPLY:
 112                         wprintf("<TR><TD COLSPAN=2>\n"
 113                                 "<IMG ALIGN=CENTER "
 114                                 "SRC=\"/static/vcalendar.gif\">"
 115                                 "&nbsp;&nbsp;"
 116                                 "<B>Attendee's reply to your invitation</B>"
 117                                 "</TD></TR>\n"
 118                         );
 119                         break;
 120                     case ICAL_METHOD_PUBLISH:
 121                         wprintf("<TR><TD COLSPAN=2>\n"
 122                                 "<IMG ALIGN=CENTER "
 123                                 "SRC=\"/static/vcalendar.gif\">"
 124                                 "&nbsp;&nbsp;"
 125                                 "<B>Published event</B>"
 126                                 "</TD></TR>\n"
 127                         );
 128                         break;
 129                     default:
 130                         wprintf("<TR><TD COLSPAN=2>"
 131                                 "I don't know what to do with this.</TD></TR>"
 132                                 "\n");
 133                         break;
 134                 }
 135         }
 136
 137         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 138         if (p != NULL) {
 139                 wprintf("<TR><TD><B>Summary:</B></TD><TD>");
 140                 escputs((char *)icalproperty_get_comment(p));
 141                 wprintf("</TD></TR>\n");
 142         }
 143
 144         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 145         if (p != NULL) {
 146                 wprintf("<TR><TD><B>Location:</B></TD><TD>");
 147                 escputs((char *)icalproperty_get_comment(p));
 148                 wprintf("</TD></TR>\n");
 149         }
 150
 151         /*
 152          * Only show start/end times if we're actually looking at the VEVENT
 153          * component.  Otherwise it shows bogus dates for things like timezone.
 154          */
 155         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 156
 157                 p = icalcomponent_get_first_property(cal,
 158                                                 ICAL_DTSTART_PROPERTY);
 159                 if (p != NULL) {
 160                         t = icalproperty_get_dtstart(p);
 161
 162                         if (t.is_date) {
 163                                 wprintf("<TR><TD><B>Date:"
 164                                         "</B></TD><TD>"
 165                                         "%s %d, %d</TD></TR>",
 166                                         months[t.month - 1],
 167                                         t.day, t.year
 168                                 );
 169                         }
 170                         else {
 171                                 tt = icaltime_as_timet(t);
 172                                 fmt_date(buf, tt);
 173                                 wprintf("<TR><TD><B>Starting date/time:"
 174                                         "</B></TD><TD>"
 175                                         "%s</TD></TR>", buf
 176                                 );
 177                         }
 178                 }
 179
 180                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 181                 if (p != NULL) {
 182                         t = icalproperty_get_dtend(p);
 183                         tt = icaltime_as_timet(t);
 184                         fmt_date(buf, tt);
 185                         wprintf("<TR><TD><B>Ending date/time:</B></TD><TD>"
 186                                 "%s</TD></TR>", buf
 187                         );
 188                 }
 189
 190         }
 191
 192         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 193         if (p != NULL) {
 194                 wprintf("<TR><TD><B>Description:</B></TD><TD>");
 195                 escputs((char *)icalproperty_get_comment(p));
 196                 wprintf("</TD></TR>\n");
 197         }
 198
 199         /* If the component has attendees, iterate through them. */
 200         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 201                 wprintf("<TR><TD><B>Attendee:</B></TD><TD>");
 202                 strcpy(buf, icalproperty_get_attendee(p));
 203                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 204
 205                         /* screen name or email address */
 206                         strcpy(buf, &buf[7]);
 207                         striplt(buf);
 208                         escputs(buf);
 209                         wprintf(" ");
 210
 211                         /* participant status */
 212                         partstat_as_string(buf, p);
 213                         escputs(buf);
 214                 }
 215                 wprintf("</TD></TR>\n");
 216         }
 217
 218         /* If the component has subcomponents, recurse through them. */
 219         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 220             (c != 0);
 221             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 222                 /* Recursively process subcomponent */
 223                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 224         }
 225
 226         /* If this is a REQUEST, display conflicts and buttons */
 227         if (the_method == ICAL_METHOD_REQUEST) {
 228
 229                 /* Check for conflicts */
 230                 lprintf(9, "Checking server calendar for conflicts...\n");
 231                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 232                 serv_gets(buf);
 233                 if (buf[0] == '1') {
 234                         while (serv_gets(buf), strcmp(buf, "000")) {
 235                                 extract(conflict_name, buf, 3);
 236                                 is_update = extract_int(buf, 4);
 237                                 wprintf("<TR><TD><B><I>%s</I></B></TD>"
 238                                         "<TD>"
 239                                         "%s "
 240                                         "<I>&quot;",
 241
 242                                         (is_update ?
 243                                                 "Update:" :
 244                                                 "CONFLICT:"
 245                                         ),
 246
 247                                         (is_update ?
 248                                                 "This is an update of" :
 249                                                 "This event would conflict with"
 250                                         )
 251
 252                                 );
 253                                 escputs(conflict_name);
 254                                 wprintf("&quot;</I> "
 255                                         "which is already in your calendar."
 256                                         "</TD></TR>\n");
 257                         }
 258                 }
 259                 lprintf(9, "...done.\n");
 260
 261                 /* Display the Accept/Decline buttons */
 262                 wprintf("<TR><TD COLSPAN=2>"
 263                         "<FORM METHOD=\"GET\" "
 264                         "ACTION=\"/respond_to_request\">\n"
 265                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 266                                 "VALUE=\"Accept\">\n"
 267                         "&nbsp;&nbsp;"
 268                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 269                                 "VALUE=\"Tentative\">\n"
 270                         "&nbsp;&nbsp;"
 271                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 272                                 "VALUE=\"Decline\">\n"
 273                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 274                                 "VALUE=\"%ld\">"
 275                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 276                                 "VALUE=\"%s\">"
 277                         "</FORM>"
 278                         "</TD></TR>\n",
 279                         msgnum, cal_partnum
 280                 );
 281
 282         }
 283
 284         /* If this is a REPLY, display update button */
 285         if (the_method == ICAL_METHOD_REPLY) {
 286
 287                 /***********
 288                  * In the future, if we want to validate this object before
 289                  * continuing, we can do it this way:
 290                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 291                 serv_gets(buf);
 292                 }
 293                  ***********/
 294
 295                 /* Display the update buttons */
 296                 wprintf("<TR><TD COLSPAN=2>"
 297                         "Click <i>Update</i> to accept this reply and "
 298                         "update your calendar."
 299                         "<FORM METHOD=\"GET\" "
 300                         "ACTION=\"/handle_rsvp\">\n"
 301                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 302                                 "VALUE=\"Update\">\n"
 303                         "&nbsp;&nbsp;"
 304                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 305                                 "VALUE=\"Ignore\">\n"
 306                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 307                                 "VALUE=\"%ld\">"
 308                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 309                                 "VALUE=\"%s\">"
 310                         "</FORM>"
 311                         "</TD></TR>\n",
 312                         msgnum, cal_partnum
 313                 );
 314
 315         }
 316
 317         /* Trailing HTML for the display of this object */
 318         if (recursion_level == 0) {
 319
 320                 wprintf("</TR></TABLE></CENTER>\n");
 321         }
 322 }
 323
 324
 325 /*
 326  * Deserialize a calendar object in a message so it can be processed.
 327  * (This is the main entry point for these things)
 328  */
 329 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 330         icalcomponent *cal;
 331
 332         cal = icalcomponent_new_from_string(part_source);
 333
 334         if (cal == NULL) {
 335                 wprintf("Error parsing calendar object<BR>\n");
 336                 return;
 337         }
 338
 339         ical_dezonify(cal);
 340         cal_process_object(cal, 0, msgnum, cal_partnum);
 341
 342         /* Free the memory we obtained from libical's constructor */
 343         icalcomponent_free(cal);
 344 }
 345
 346
 347
 348
 349 /*
 350  * Respond to a meeting request
 351  */
 352 void respond_to_request(void) {
 353         char buf[SIZ];
 354
 355         output_headers(3);
 356
 357         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 358                 "<SPAN CLASS=\"titlebar\">Respond to meeting request</SPAN>"
 359                 "</TD></TR></TABLE><BR>\n"
 360         );
 361
 362         serv_printf("ICAL respond|%s|%s|%s|",
 363                 bstr("msgnum"),
 364                 bstr("cal_partnum"),
 365                 bstr("sc")
 366         );
 367         serv_gets(buf);
 368
 369         if (buf[0] == '2') {
 370                 wprintf("<TABLE BORDER=0><TR><TD>"
 371                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 372                         "</TD><TD>"
 373                 );
 374                 if (!strcasecmp(bstr("sc"), "accept")) {
 375                         wprintf("You have accepted this meeting invitation.  "
 376                                 "It has been entered into your calendar, "
 377                         );
 378                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 379                         wprintf("You have tentatively accepted this meeting invitation.  "
 380                                 "It has been 'pencilled in' to your calendar, "
 381                         );
 382                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 383                         wprintf("You have declined this meeting invitation.  "
 384                                 "It has <b>not</b> been entered into your calendar, "
 385                         );
 386                 }
 387                 wprintf("and a reply has been sent to the meeting organizer."
 388                         "</TD></TR></TABLE>\n"
 389                 );
 390         } else {
 391                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 392                         "%s\n", &buf[4]);
 393         }
 394
 395         wprintf("<A HREF=\"/dotskip?room=");
 396         urlescputs(WC->wc_roomname);
 397         wprintf("\"><BR>Return to messages</A><BR>\n");
 398
 399         wDumpContent(1);
 400 }
 401
 402
 403
 404 /*
 405  * Handle an incoming RSVP
 406  */
 407 void handle_rsvp(void) {
 408         char buf[SIZ];
 409
 410         output_headers(3);
 411
 412         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 413                 "<SPAN CLASS=\"titlebar\">"
 414                 "Update your calendar with this RSVP</SPAN>"
 415                 "</TD></TR></TABLE><BR>\n"
 416         );
 417
 418         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 419                 bstr("msgnum"),
 420                 bstr("cal_partnum"),
 421                 bstr("sc")
 422         );
 423         serv_gets(buf);
 424
 425         if (buf[0] == '2') {
 426                 wprintf("<TABLE BORDER=0><TR><TD>"
 427                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 428                         "</TD><TD>"
 429                 );
 430                 if (!strcasecmp(bstr("sc"), "update")) {
 431                         wprintf("Your calendar has been updated "
 432                                 "to reflect this RSVP."
 433                         );
 434                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 435                         wprintf("You have chosen to ignore this RSVP. "
 436                                 "Your calendar has <b>not</b> been updated."
 437                         );
 438                 }
 439                 wprintf("</TD></TR></TABLE>\n"
 440                 );
 441         } else {
 442                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 443                         "%s\n", &buf[4]);
 444         }
 445
 446         wprintf("<A HREF=\"/dotskip?room=");
 447         urlescputs(WC->wc_roomname);
 448         wprintf("\"><BR>Return to messages</A><BR>\n");
 449
 450         wDumpContent(1);
 451 }
 452
 453
 454
 455
 456 /*****************************************************************************/
 457
 458
 459
 460 /*
 461  * Display handlers for message reading
 462  */
 463
 464
 465
 466 /*
 467  * If we're reading calendar items, just store them for now.  We have to
 468  * sort and re-output them later when we draw the calendar.
 469  */
 470 void display_individual_cal(icalcomponent *cal, long msgnum) {
 471
 472         WC->num_cal += 1;
 473
 474         WC->disp_cal = realloc(WC->disp_cal,
 475                         (sizeof(icalcomponent *) * WC->num_cal) );
 476         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 477
 478         WC->cal_msgnum = realloc(WC->cal_msgnum,
 479                         (sizeof(long) * WC->num_cal) );
 480         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 481 }
 482
 483
 484
 485 /*
 486  * Display a task by itself (for editing)
 487  *
 488  */
 489 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 490         icalcomponent *vtodo;
 491         icalproperty *p;
 492         struct icaltimetype t;
 493         time_t now;
 494         int created_new_vtodo = 0;
 495
 496         now = time(NULL);
 497
 498         if (supplied_vtodo != NULL) {
 499                 vtodo = supplied_vtodo;
 500
 501                 /* If we're looking at a fully encapsulated VCALENDAR
 502                  * rather than a VTODO component, attempt to use the first
 503                  * relevant VTODO subcomponent.  If there is none, the
 504                  * NULL returned by icalcomponent_get_first_component() will
 505                  * tell the next iteration of this function to create a
 506                  * new one.
 507                  */
 508                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 509                         display_edit_individual_task(
 510                                 icalcomponent_get_first_component(
 511                                         vtodo, ICAL_VTODO_COMPONENT
 512                                 ), msgnum
 513                         );
 514                         return;
 515                 }
 516         }
 517         else {
 518                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 519                 created_new_vtodo = 1;
 520         }
 521
 522         output_headers(3);
 523         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 524                 "<SPAN CLASS=\"titlebar\">Edit task</SPAN>"
 525                 "</TD></TR></TABLE><BR>\n"
 526         );
 527
 528         do_template("beginbox_nt");
 529
 530         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 531         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 532                 msgnum);
 533
 534         wprintf("<TABLE border=0>\n");
 535
 536         wprintf("<TR><TD>Summary:</TD><TD>"
 537                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 538                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 539         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 540         if (p != NULL) {
 541                 escputs((char *)icalproperty_get_comment(p));
 542         }
 543         wprintf("\"></TD></TR>\n");
 544
 545         wprintf("<TR><TD>Start date:</TD><TD>");
 546         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 547         if (p != NULL) {
 548                 t = icalproperty_get_dtstart(p);
 549         }
 550         else {
 551                 t = icaltime_from_timet(now, 0);
 552         }
 553         display_icaltimetype_as_webform(&t, "dtstart");
 554         wprintf("</TD></TR>\n");
 555
 556         wprintf("<TR><TD>Due date:</TD><TD>");
 557         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 558         if (p != NULL) {
 559                 t = icalproperty_get_due(p);
 560         }
 561         else {
 562                 t = icaltime_from_timet(now, 0);
 563         }
 564         display_icaltimetype_as_webform(&t, "due");
 565         wprintf("</TD></TR>\n");
 566         wprintf("<TR><TD>Description:</TD><TD>");
 567         wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
 568                 "ROWS=10 COLS=80 WIDTH=80>\n"
 569         );
 570         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 571         if (p != NULL) {
 572                 escputs((char *)icalproperty_get_comment(p));
 573         }
 574         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 575
 576         wprintf("<CENTER>"
 577                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 578                 "&nbsp;&nbsp;"
 579                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 580                 "&nbsp;&nbsp;"
 581                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 582                 "</CENTER>\n"
 583         );
 584
 585         wprintf("</FORM>\n");
 586
 587         do_template("endbox");
 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;
 604         int created_new_vtodo = 0;
 605
 606         if (supplied_vtodo != NULL) {
 607                 vtodo = supplied_vtodo;
 608                 /* If we're looking at a fully encapsulated VCALENDAR
 609                  * rather than a VTODO component, attempt to use the first
 610                  * relevant VTODO subcomponent.  If there is none, the
 611                  * NULL returned by icalcomponent_get_first_component() will
 612                  * tell the next iteration of this function to create a
 613                  * new one.
 614                  */
 615                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 616                         save_individual_task(
 617                                 icalcomponent_get_first_component(
 618                                         vtodo, ICAL_VTODO_COMPONENT
 619                                 ), msgnum
 620                         );
 621                         return;
 622                 }
 623         }
 624         else {
 625                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 626                 created_new_vtodo = 1;
 627         }
 628
 629         if (!strcasecmp(bstr("sc"), "Save")) {
 630
 631                 /* Replace values in the component with ones from the form */
 632
 633                 while (prop = icalcomponent_get_first_property(vtodo,
 634                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 635                         icalcomponent_remove_property(vtodo, prop);
 636                         icalproperty_free(prop);
 637                 }
 638                 icalcomponent_add_property(vtodo,
 639                         icalproperty_new_summary(bstr("summary")));
 640
 641                 while (prop = icalcomponent_get_first_property(vtodo,
 642                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 643                         icalcomponent_remove_property(vtodo, prop);
 644                         icalproperty_free(prop);
 645                 }
 646                 icalcomponent_add_property(vtodo,
 647                         icalproperty_new_description(bstr("description")));
 648
 649                 while (prop = icalcomponent_get_first_property(vtodo,
 650                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 651                         icalcomponent_remove_property(vtodo, prop);
 652                         icalproperty_free(prop);
 653                 }
 654                 icalcomponent_add_property(vtodo,
 655                         icalproperty_new_dtstart(
 656                                 icaltime_from_webform("dtstart")
 657                         )
 658                 );
 659
 660                 while (prop = icalcomponent_get_first_property(vtodo,
 661                       ICAL_DUE_PROPERTY), prop != NULL) {
 662                         icalcomponent_remove_property(vtodo, prop);
 663                         icalproperty_free(prop);
 664                 }
 665                 icalcomponent_add_property(vtodo,
 666                         icalproperty_new_due(
 667                                 icaltime_from_webform("due")
 668                         )
 669                 );
 670
 671                 /* Serialize it and save it to the message base */
 672                 serv_puts("ENT0 1|||4");
 673                 serv_gets(buf);
 674                 if (buf[0] == '4') {
 675                         serv_puts("Content-type: text/calendar");
 676                         serv_puts("");
 677                         serv_puts(icalcomponent_as_ical_string(vtodo));
 678                         serv_puts("000");
 679
 680                         /* Probably not necessary; the server will see the UID
 681                          * of the object and delete the old one anyway, but
 682                          * just in case...
 683                          */
 684                         delete_existing = 1;
 685                 }
 686         }
 687
 688         /*
 689          * If the user clicked 'Delete' then explicitly delete the message.
 690          */
 691         if (!strcasecmp(bstr("sc"), "Delete")) {
 692                 delete_existing = 1;
 693         }
 694
 695         if ( (delete_existing) && (msgnum > 0L) ) {
 696                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 697                 serv_gets(buf);
 698         }
 699
 700         if (created_new_vtodo) {
 701                 icalcomponent_free(vtodo);
 702         }
 703
 704         /* Go back to the task list */
 705         readloop("readfwd");
 706 }
 707
 708
 709
 710 /*
 711  * Code common to all display handlers.  Given a message number and a MIME
 712  * type, we load the message and hunt for that MIME type.  If found, we load
 713  * the relevant part, deserialize it into a libical component, filter it for
 714  * the requested object type, and feed it to the specified handler.
 715  *
 716  */
 717 void display_using_handler(long msgnum,
 718                         char *mimetype,
 719                         icalcomponent_kind which_kind,
 720                         void (*callback)(icalcomponent *, long)
 721         ) {
 722         char buf[SIZ];
 723         char mime_partnum[SIZ];
 724         char mime_filename[SIZ];
 725         char mime_content_type[SIZ];
 726         char mime_disposition[SIZ];
 727         int mime_length;
 728         char relevant_partnum[SIZ];
 729         char *relevant_source = NULL;
 730         icalcomponent *cal, *c;
 731
 732         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 733         serv_puts(buf);
 734         serv_gets(buf);
 735         if (buf[0] != '1') return;
 736
 737         while (serv_gets(buf), strcmp(buf, "000")) {
 738                 if (!strncasecmp(buf, "part=", 5)) {
 739                         extract(mime_filename, &buf[5], 1);
 740                         extract(mime_partnum, &buf[5], 2);
 741                         extract(mime_disposition, &buf[5], 3);
 742                         extract(mime_content_type, &buf[5], 4);
 743                         mime_length = extract_int(&buf[5], 5);
 744
 745                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 746                                 strcpy(relevant_partnum, mime_partnum);
 747                         }
 748
 749                 }
 750         }
 751
 752         if (strlen(relevant_partnum) > 0) {
 753                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 754                 if (relevant_source != NULL) {
 755
 756                         cal = icalcomponent_new_from_string(relevant_source);
 757                         if (cal != NULL) {
 758
 759                                 ical_dezonify(cal);
 760
 761                                 /* Simple components of desired type */
 762                                 if (icalcomponent_isa(cal) == which_kind) {
 763                                         callback(cal, msgnum);
 764                                 }
 765
 766                                 /* Subcomponents of desired type */
 767                                 for (c = icalcomponent_get_first_component(cal,
 768                                     which_kind);
 769                                     (c != 0);
 770                                     c = icalcomponent_get_next_component(cal,
 771                                     which_kind)) {
 772                                         callback(c, msgnum);
 773                                 }
 774                                 icalcomponent_free(cal);
 775                         }
 776                         free(relevant_source);
 777                 }
 778         }
 779
 780 }
 781
 782 void display_calendar(long msgnum) {
 783         display_using_handler(msgnum, "text/calendar",
 784                                 ICAL_VEVENT_COMPONENT,
 785                                 display_individual_cal);
 786 }
 787
 788 void display_task(long msgnum) {
 789         display_using_handler(msgnum, "text/calendar",
 790                                 ICAL_VTODO_COMPONENT,
 791                                 display_individual_cal);
 792 }
 793
 794 void display_edit_task(void) {
 795         long msgnum = 0L;
 796
 797         /* Force change the room if we have to */
 798         if (strlen(bstr("taskrm")) > 0) {
 799                 gotoroom(bstr("taskrm"), 0);
 800         }
 801
 802         msgnum = atol(bstr("msgnum"));
 803         if (msgnum > 0L) {
 804                 /* existing task */
 805                 display_using_handler(msgnum, "text/calendar",
 806                                 ICAL_VTODO_COMPONENT,
 807                                 display_edit_individual_task);
 808         }
 809         else {
 810                 /* new task */
 811                 display_edit_individual_task(NULL, 0L);
 812         }
 813 }
 814
 815 void save_task(void) {
 816         long msgnum = 0L;
 817
 818         msgnum = atol(bstr("msgnum"));
 819         if (msgnum > 0L) {
 820                 display_using_handler(msgnum, "text/calendar",
 821                                 ICAL_VTODO_COMPONENT,
 822                                 save_individual_task);
 823         }
 824         else {
 825                 save_individual_task(NULL, 0L);
 826         }
 827 }
 828
 829 void display_edit_event(void) {
 830         long msgnum = 0L;
 831
 832         msgnum = atol(bstr("msgnum"));
 833         if (msgnum > 0L) {
 834                 /* existing event */
 835                 display_using_handler(msgnum, "text/calendar",
 836                                 ICAL_VEVENT_COMPONENT,
 837                                 display_edit_individual_event);
 838         }
 839         else {
 840                 /* new event */
 841                 display_edit_individual_event(NULL, 0L);
 842         }
 843 }
 844
 845 void save_event(void) {
 846         long msgnum = 0L;
 847
 848         msgnum = atol(bstr("msgnum"));
 849
 850         if (msgnum > 0L) {
 851                 display_using_handler(msgnum, "text/calendar",
 852                                 ICAL_VEVENT_COMPONENT,
 853                                 save_individual_event);
 854         }
 855         else {
 856                 save_individual_event(NULL, 0L);
 857         }
 858 }
 859
 860
 861
 862
 863
 864 /*
 865  * freebusy display (for client software)
 866  */
 867 void do_freebusy(char *req) {
 868         char who[SIZ];
 869         char buf[SIZ];
 870         char *fb;
 871
 872         extract_token(who, req, 1, ' ');
 873         if (!strncasecmp(who, "/freebusy/", 10)) {
 874                 strcpy(who, &who[10]);
 875         }
 876         unescape_input(who);
 877
 878         if ( (!strcasecmp(&who[strlen(who)-4], ".vcf"))
 879            || (!strcasecmp(&who[strlen(who)-4], ".vfb")) ) {
 880                 who[strlen(who)-4] = 0;
 881         }
 882
 883         lprintf(9, "freebusy requested for <%s>\n", who);
 884         serv_printf("ICAL freebusy|%s", who);
 885         serv_gets(buf);
 886
 887         if (buf[0] != '1') {
 888                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 889                 output_headers(0);
 890                 wprintf("Content-Type: text/plain\n");
 891                 wprintf("\n");
 892                 wprintf("%s\n", &buf[4]);
 893                 return;
 894         }
 895
 896         fb = read_server_text();
 897         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
 898         free(fb);
 899 }
 900
 901
 902
 903 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */