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=\"#007700\"><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=\"#007700\"><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 in the task list
 487  */
 488 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 489         icalproperty *p;
 490
 491         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 492         wprintf("<A HREF=\"/display_edit_task?msgnum=%ld&taskrm=", msgnum);
 493         urlescputs(WC->wc_roomname);
 494         wprintf("\">");
 495         if (p != NULL) {
 496                 escputs((char *)icalproperty_get_comment(p));
 497         }
 498         wprintf("</A><BR>\n");
 499 }
 500
 501
 502 /*
 503  * Display a task by itself (for editing)
 504  *
 505  */
 506 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 507         icalcomponent *vtodo;
 508         icalproperty *p;
 509         struct icaltimetype t;
 510         time_t now;
 511         int created_new_vtodo = 0;
 512
 513         now = time(NULL);
 514
 515         if (supplied_vtodo != NULL) {
 516                 vtodo = supplied_vtodo;
 517
 518                 /* If we're looking at a fully encapsulated VCALENDAR
 519                  * rather than a VTODO component, attempt to use the first
 520                  * relevant VTODO subcomponent.  If there is none, the
 521                  * NULL returned by icalcomponent_get_first_component() will
 522                  * tell the next iteration of this function to create a
 523                  * new one.
 524                  */
 525                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 526                         display_edit_individual_task(
 527                                 icalcomponent_get_first_component(
 528                                         vtodo, ICAL_VTODO_COMPONENT
 529                                 ), msgnum
 530                         );
 531                         return;
 532                 }
 533         }
 534         else {
 535                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 536                 created_new_vtodo = 1;
 537         }
 538
 539         output_headers(3);
 540         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#007700\"><TR><TD>"
 541                 "<SPAN CLASS=\"titlebar\">Edit task</SPAN>"
 542                 "</TD></TR></TABLE><BR>\n"
 543         );
 544
 545         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 546         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 547                 msgnum);
 548
 549         wprintf("Summary: "
 550                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 551                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 552         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 553         if (p != NULL) {
 554                 escputs((char *)icalproperty_get_comment(p));
 555         }
 556         wprintf("\"><BR>\n");
 557
 558         wprintf("Start date: ");
 559         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 560         if (p != NULL) {
 561                 t = icalproperty_get_dtstart(p);
 562         }
 563         else {
 564                 t = icaltime_from_timet(now, 0);
 565         }
 566         display_icaltimetype_as_webform(&t, "dtstart");
 567         wprintf("<BR>\n");
 568
 569         wprintf("Due date: ");
 570         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 571         if (p != NULL) {
 572                 t = icalproperty_get_due(p);
 573         }
 574         else {
 575                 t = icaltime_from_timet(now, 0);
 576         }
 577         display_icaltimetype_as_webform(&t, "due");
 578         wprintf("<BR>\n");
 579
 580         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 581                 "ROWS=10 COLS=80 WIDTH=80>\n"
 582         );
 583         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 584         if (p != NULL) {
 585                 escputs((char *)icalproperty_get_comment(p));
 586         }
 587         wprintf("</TEXTAREA><BR>\n");
 588
 589         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 590                 "&nbsp;&nbsp;"
 591                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 592                 "&nbsp;&nbsp;"
 593                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 594                 "</CENTER>\n"
 595         );
 596
 597         wprintf("</FORM>\n");
 598
 599         wDumpContent(1);
 600
 601         if (created_new_vtodo) {
 602                 icalcomponent_free(vtodo);
 603         }
 604 }
 605
 606 /*
 607  * Save an edited task
 608  *
 609  */
 610 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 611         char buf[SIZ];
 612         int delete_existing = 0;
 613         icalproperty *prop;
 614         icalcomponent *vtodo;
 615         int created_new_vtodo = 0;
 616
 617         if (supplied_vtodo != NULL) {
 618                 vtodo = supplied_vtodo;
 619                 /* If we're looking at a fully encapsulated VCALENDAR
 620                  * rather than a VTODO component, attempt to use the first
 621                  * relevant VTODO subcomponent.  If there is none, the
 622                  * NULL returned by icalcomponent_get_first_component() will
 623                  * tell the next iteration of this function to create a
 624                  * new one.
 625                  */
 626                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 627                         save_individual_task(
 628                                 icalcomponent_get_first_component(
 629                                         vtodo, ICAL_VTODO_COMPONENT
 630                                 ), msgnum
 631                         );
 632                         return;
 633                 }
 634         }
 635         else {
 636                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 637                 created_new_vtodo = 1;
 638         }
 639
 640         if (!strcasecmp(bstr("sc"), "Save")) {
 641
 642                 /* Replace values in the component with ones from the form */
 643
 644                 while (prop = icalcomponent_get_first_property(vtodo,
 645                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 646                         icalcomponent_remove_property(vtodo, prop);
 647                         icalproperty_free(prop);
 648                 }
 649                 icalcomponent_add_property(vtodo,
 650                         icalproperty_new_summary(bstr("summary")));
 651
 652                 while (prop = icalcomponent_get_first_property(vtodo,
 653                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 654                         icalcomponent_remove_property(vtodo, prop);
 655                         icalproperty_free(prop);
 656                 }
 657                 icalcomponent_add_property(vtodo,
 658                         icalproperty_new_description(bstr("description")));
 659
 660                 while (prop = icalcomponent_get_first_property(vtodo,
 661                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 662                         icalcomponent_remove_property(vtodo, prop);
 663                         icalproperty_free(prop);
 664                 }
 665                 icalcomponent_add_property(vtodo,
 666                         icalproperty_new_dtstart(
 667                                 icaltime_from_webform("dtstart")
 668                         )
 669                 );
 670
 671                 while (prop = icalcomponent_get_first_property(vtodo,
 672                       ICAL_DUE_PROPERTY), prop != NULL) {
 673                         icalcomponent_remove_property(vtodo, prop);
 674                         icalproperty_free(prop);
 675                 }
 676                 icalcomponent_add_property(vtodo,
 677                         icalproperty_new_due(
 678                                 icaltime_from_webform("due")
 679                         )
 680                 );
 681
 682                 /* Serialize it and save it to the message base */
 683                 serv_puts("ENT0 1|||4");
 684                 serv_gets(buf);
 685                 if (buf[0] == '4') {
 686                         serv_puts("Content-type: text/calendar");
 687                         serv_puts("");
 688                         serv_puts(icalcomponent_as_ical_string(vtodo));
 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         }
 698
 699         /*
 700          * If the user clicked 'Delete' then explicitly delete the message.
 701          */
 702         if (!strcasecmp(bstr("sc"), "Delete")) {
 703                 delete_existing = 1;
 704         }
 705
 706         if ( (delete_existing) && (msgnum > 0L) ) {
 707                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 708                 serv_gets(buf);
 709         }
 710
 711         if (created_new_vtodo) {
 712                 icalcomponent_free(vtodo);
 713         }
 714
 715         /* Go back to the task list */
 716         readloop("readfwd");
 717 }
 718
 719
 720
 721 /*
 722  * Code common to all display handlers.  Given a message number and a MIME
 723  * type, we load the message and hunt for that MIME type.  If found, we load
 724  * the relevant part, deserialize it into a libical component, filter it for
 725  * the requested object type, and feed it to the specified handler.
 726  *
 727  */
 728 void display_using_handler(long msgnum,
 729                         char *mimetype,
 730                         icalcomponent_kind which_kind,
 731                         void (*callback)(icalcomponent *, long)
 732         ) {
 733         char buf[SIZ];
 734         char mime_partnum[SIZ];
 735         char mime_filename[SIZ];
 736         char mime_content_type[SIZ];
 737         char mime_disposition[SIZ];
 738         int mime_length;
 739         char relevant_partnum[SIZ];
 740         char *relevant_source = NULL;
 741         icalcomponent *cal, *c;
 742
 743         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 744         serv_puts(buf);
 745         serv_gets(buf);
 746         if (buf[0] != '1') return;
 747
 748         while (serv_gets(buf), strcmp(buf, "000")) {
 749                 if (!strncasecmp(buf, "part=", 5)) {
 750                         extract(mime_filename, &buf[5], 1);
 751                         extract(mime_partnum, &buf[5], 2);
 752                         extract(mime_disposition, &buf[5], 3);
 753                         extract(mime_content_type, &buf[5], 4);
 754                         mime_length = extract_int(&buf[5], 5);
 755
 756                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 757                                 strcpy(relevant_partnum, mime_partnum);
 758                         }
 759
 760                 }
 761         }
 762
 763         if (strlen(relevant_partnum) > 0) {
 764                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 765                 if (relevant_source != NULL) {
 766
 767                         cal = icalcomponent_new_from_string(relevant_source);
 768                         if (cal != NULL) {
 769
 770                                 ical_dezonify(cal);
 771
 772                                 /* Simple components of desired type */
 773                                 if (icalcomponent_isa(cal) == which_kind) {
 774                                         callback(cal, msgnum);
 775                                 }
 776
 777                                 /* Subcomponents of desired type */
 778                                 for (c = icalcomponent_get_first_component(cal,
 779                                     which_kind);
 780                                     (c != 0);
 781                                     c = icalcomponent_get_next_component(cal,
 782                                     which_kind)) {
 783                                         callback(c, msgnum);
 784                                 }
 785                                 icalcomponent_free(cal);
 786                         }
 787                         free(relevant_source);
 788                 }
 789         }
 790
 791 }
 792
 793 void display_calendar(long msgnum) {
 794         display_using_handler(msgnum, "text/calendar",
 795                                 ICAL_VEVENT_COMPONENT,
 796                                 display_individual_cal);
 797 }
 798
 799 void display_task(long msgnum) {
 800         display_using_handler(msgnum, "text/calendar",
 801                                 ICAL_VTODO_COMPONENT,
 802                                 display_individual_task);
 803 }
 804
 805 void display_edit_task(void) {
 806         long msgnum = 0L;
 807
 808         /* Force change the room if we have to */
 809         if (strlen(bstr("taskrm")) > 0) {
 810                 gotoroom(bstr("taskrm"), 0);
 811         }
 812
 813         msgnum = atol(bstr("msgnum"));
 814         if (msgnum > 0L) {
 815                 /* existing task */
 816                 display_using_handler(msgnum, "text/calendar",
 817                                 ICAL_VTODO_COMPONENT,
 818                                 display_edit_individual_task);
 819         }
 820         else {
 821                 /* new task */
 822                 display_edit_individual_task(NULL, 0L);
 823         }
 824 }
 825
 826 void save_task(void) {
 827         long msgnum = 0L;
 828
 829         msgnum = atol(bstr("msgnum"));
 830         if (msgnum > 0L) {
 831                 display_using_handler(msgnum, "text/calendar",
 832                                 ICAL_VTODO_COMPONENT,
 833                                 save_individual_task);
 834         }
 835         else {
 836                 save_individual_task(NULL, 0L);
 837         }
 838 }
 839
 840 void display_edit_event(void) {
 841         long msgnum = 0L;
 842
 843         msgnum = atol(bstr("msgnum"));
 844         if (msgnum > 0L) {
 845                 /* existing event */
 846                 display_using_handler(msgnum, "text/calendar",
 847                                 ICAL_VEVENT_COMPONENT,
 848                                 display_edit_individual_event);
 849         }
 850         else {
 851                 /* new event */
 852                 display_edit_individual_event(NULL, 0L);
 853         }
 854 }
 855
 856 void save_event(void) {
 857         long msgnum = 0L;
 858
 859         msgnum = atol(bstr("msgnum"));
 860
 861         if (msgnum > 0L) {
 862                 display_using_handler(msgnum, "text/calendar",
 863                                 ICAL_VEVENT_COMPONENT,
 864                                 save_individual_event);
 865         }
 866         else {
 867                 save_individual_event(NULL, 0L);
 868         }
 869 }
 870
 871
 872
 873
 874
 875 /*
 876  * freebusy display (for client software)
 877  */
 878 void do_freebusy(char *req) {
 879         char who[SIZ];
 880         char buf[SIZ];
 881         char *fb;
 882
 883         extract_token(who, req, 1, ' ');
 884         if (!strncasecmp(who, "/freebusy/", 10)) {
 885                 strcpy(who, &who[10]);
 886         }
 887         unescape_input(who);
 888
 889         if ( (!strcasecmp(&who[strlen(who)-4], ".vcf"))
 890            || (!strcasecmp(&who[strlen(who)-4], ".vfb")) ) {
 891                 who[strlen(who)-4] = 0;
 892         }
 893
 894         lprintf(9, "freebusy requested for <%s>\n", who);
 895         serv_printf("ICAL freebusy|%s", who);
 896         serv_gets(buf);
 897
 898         if (buf[0] != '1') {
 899                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 900                 output_headers(0);
 901                 wprintf("Content-Type: text/plain\n");
 902                 wprintf("\n");
 903                 wprintf("%s\n", &buf[4]);
 904                 return;
 905         }
 906
 907         fb = read_server_text();
 908         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
 909         free(fb);
 910 }
 911
 912
 913
 914 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */