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(1, 1, 2, 0, 0, 0, 0);
 356
 357         wprintf("<div id=\"banner\">\n");
 358         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 359                 "<SPAN CLASS=\"titlebar\">Respond to meeting request</SPAN>"
 360                 "</TD></TR></TABLE>\n"
 361         );
 362         wprintf("</div>\n<div id=\"content\">\n");
 363
 364         serv_printf("ICAL respond|%s|%s|%s|",
 365                 bstr("msgnum"),
 366                 bstr("cal_partnum"),
 367                 bstr("sc")
 368         );
 369         serv_gets(buf);
 370
 371         if (buf[0] == '2') {
 372                 wprintf("<TABLE BORDER=0><TR><TD>"
 373                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 374                         "</TD><TD>"
 375                 );
 376                 if (!strcasecmp(bstr("sc"), "accept")) {
 377                         wprintf("You have accepted this meeting invitation.  "
 378                                 "It has been entered into your calendar, "
 379                         );
 380                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 381                         wprintf("You have tentatively accepted this meeting invitation.  "
 382                                 "It has been 'pencilled in' to your calendar, "
 383                         );
 384                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 385                         wprintf("You have declined this meeting invitation.  "
 386                                 "It has <b>not</b> been entered into your calendar, "
 387                         );
 388                 }
 389                 wprintf("and a reply has been sent to the meeting organizer."
 390                         "</TD></TR></TABLE>\n"
 391                 );
 392         } else {
 393                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 394                         "%s\n", &buf[4]);
 395         }
 396
 397         wprintf("<A HREF=\"/dotskip?room=");
 398         urlescputs(WC->wc_roomname);
 399         wprintf("\"><br />Return to messages</A><br />\n");
 400
 401         wDumpContent(1);
 402 }
 403
 404
 405
 406 /*
 407  * Handle an incoming RSVP
 408  */
 409 void handle_rsvp(void) {
 410         char buf[SIZ];
 411
 412         output_headers(1, 1, 2, 0, 0, 0, 0);
 413
 414         wprintf("<div id=\"banner\">\n");
 415         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 416                 "<SPAN CLASS=\"titlebar\">"
 417                 "Update your calendar with this RSVP</SPAN>"
 418                 "</TD></TR></TABLE>\n"
 419                 "</div>\n<div id=\"content\">\n"
 420         );
 421
 422         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 423                 bstr("msgnum"),
 424                 bstr("cal_partnum"),
 425                 bstr("sc")
 426         );
 427         serv_gets(buf);
 428
 429         if (buf[0] == '2') {
 430                 wprintf("<TABLE BORDER=0><TR><TD>"
 431                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 432                         "</TD><TD>"
 433                 );
 434                 if (!strcasecmp(bstr("sc"), "update")) {
 435                         wprintf("Your calendar has been updated "
 436                                 "to reflect this RSVP."
 437                         );
 438                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 439                         wprintf("You have chosen to ignore this RSVP. "
 440                                 "Your calendar has <b>not</b> been updated."
 441                         );
 442                 }
 443                 wprintf("</TD></TR></TABLE>\n"
 444                 );
 445         } else {
 446                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 447                         "%s\n", &buf[4]);
 448         }
 449
 450         wprintf("<A HREF=\"/dotskip?room=");
 451         urlescputs(WC->wc_roomname);
 452         wprintf("\"><br />Return to messages</A><br />\n");
 453
 454         wDumpContent(1);
 455 }
 456
 457
 458
 459
 460 /*****************************************************************************/
 461
 462
 463
 464 /*
 465  * Display handlers for message reading
 466  */
 467
 468
 469
 470 /*
 471  * If we're reading calendar items, just store them for now.  We have to
 472  * sort and re-output them later when we draw the calendar.
 473  */
 474 void display_individual_cal(icalcomponent *cal, long msgnum) {
 475
 476         WC->num_cal += 1;
 477
 478         WC->disp_cal = realloc(WC->disp_cal,
 479                         (sizeof(struct disp_cal) * WC->num_cal) );
 480         WC->disp_cal[WC->num_cal - 1].cal = icalcomponent_new_clone(cal);
 481
 482         WC->disp_cal[WC->num_cal - 1].cal_msgnum = msgnum;
 483 }
 484
 485
 486
 487 /*
 488  * Display a task by itself (for editing)
 489  *
 490  */
 491 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 492         icalcomponent *vtodo;
 493         icalproperty *p;
 494         struct icaltimetype t;
 495         time_t now;
 496         int created_new_vtodo = 0;
 497
 498         now = time(NULL);
 499
 500         if (supplied_vtodo != NULL) {
 501                 vtodo = supplied_vtodo;
 502
 503                 /* If we're looking at a fully encapsulated VCALENDAR
 504                  * rather than a VTODO component, attempt to use the first
 505                  * relevant VTODO subcomponent.  If there is none, the
 506                  * NULL returned by icalcomponent_get_first_component() will
 507                  * tell the next iteration of this function to create a
 508                  * new one.
 509                  */
 510                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 511                         display_edit_individual_task(
 512                                 icalcomponent_get_first_component(
 513                                         vtodo, ICAL_VTODO_COMPONENT
 514                                 ), msgnum
 515                         );
 516                         return;
 517                 }
 518         }
 519         else {
 520                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 521                 created_new_vtodo = 1;
 522         }
 523
 524         output_headers(1, 1, 2, 0, 0, 0, 0);
 525         wprintf("<div id=\"banner\">\n"
 526                 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 527                 "<SPAN CLASS=\"titlebar\">Edit task</SPAN>"
 528                 "</TD></TR></TABLE>\n"
 529                 "</div>\n<div id=\"content\">\n"
 530         );
 531
 532         wprintf("<center><table border=0 width=99%% bgcolor=\"#ffffff\"><tr><td>");
 533
 534         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 535         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 536                 msgnum);
 537
 538         wprintf("<TABLE border=0>\n");
 539
 540         wprintf("<TR><TD>Summary:</TD><TD>"
 541                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 542                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 543         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 544         if (p != NULL) {
 545                 escputs((char *)icalproperty_get_comment(p));
 546         }
 547         wprintf("\"></TD></TR>\n");
 548
 549         wprintf("<TR><TD>Start date:</TD><TD>");
 550         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 551         if (p != NULL) {
 552                 t = icalproperty_get_dtstart(p);
 553         }
 554         else {
 555                 t = icaltime_from_timet(now, 0);
 556         }
 557         display_icaltimetype_as_webform(&t, "dtstart");
 558         wprintf("</TD></TR>\n");
 559
 560         wprintf("<TR><TD>Due date:</TD><TD>");
 561         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 562         if (p != NULL) {
 563                 t = icalproperty_get_due(p);
 564         }
 565         else {
 566                 t = icaltime_from_timet(now, 0);
 567         }
 568         display_icaltimetype_as_webform(&t, "due");
 569         wprintf("</TD></TR>\n");
 570         wprintf("<TR><TD>Description:</TD><TD>");
 571         wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
 572                 "ROWS=10 COLS=80 WIDTH=80>\n"
 573         );
 574         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 575         if (p != NULL) {
 576                 escputs((char *)icalproperty_get_comment(p));
 577         }
 578         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 579
 580         wprintf("<CENTER>"
 581                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 582                 "&nbsp;&nbsp;"
 583                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 584                 "&nbsp;&nbsp;"
 585                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 586                 "</CENTER>\n"
 587         );
 588
 589         wprintf("</FORM>\n");
 590
 591         wprintf("</td></tr></table></center>\n");
 592         wDumpContent(1);
 593
 594         if (created_new_vtodo) {
 595                 icalcomponent_free(vtodo);
 596         }
 597 }
 598
 599 /*
 600  * Save an edited task
 601  *
 602  */
 603 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 604         char buf[SIZ];
 605         int delete_existing = 0;
 606         icalproperty *prop;
 607         icalcomponent *vtodo, *encaps;
 608         int created_new_vtodo = 0;
 609         int i;
 610         int sequence = 0;
 611
 612         if (supplied_vtodo != NULL) {
 613                 vtodo = supplied_vtodo;
 614                 /* If we're looking at a fully encapsulated VCALENDAR
 615                  * rather than a VTODO component, attempt to use the first
 616                  * relevant VTODO subcomponent.  If there is none, the
 617                  * NULL returned by icalcomponent_get_first_component() will
 618                  * tell the next iteration of this function to create a
 619                  * new one.
 620                  */
 621                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 622                         save_individual_task(
 623                                 icalcomponent_get_first_component(
 624                                         vtodo, ICAL_VTODO_COMPONENT
 625                                 ), msgnum
 626                         );
 627                         return;
 628                 }
 629         }
 630         else {
 631                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 632                 created_new_vtodo = 1;
 633         }
 634
 635         if (!strcasecmp(bstr("sc"), "Save")) {
 636
 637                 /* Replace values in the component with ones from the form */
 638
 639                 while (prop = icalcomponent_get_first_property(vtodo,
 640                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 641                         icalcomponent_remove_property(vtodo, prop);
 642                         icalproperty_free(prop);
 643                 }
 644                 icalcomponent_add_property(vtodo,
 645                         icalproperty_new_summary(bstr("summary")));
 646
 647                 while (prop = icalcomponent_get_first_property(vtodo,
 648                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 649                         icalcomponent_remove_property(vtodo, prop);
 650                         icalproperty_free(prop);
 651                 }
 652                 icalcomponent_add_property(vtodo,
 653                         icalproperty_new_description(bstr("description")));
 654
 655                 while (prop = icalcomponent_get_first_property(vtodo,
 656                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 657                         icalcomponent_remove_property(vtodo, prop);
 658                         icalproperty_free(prop);
 659                 }
 660                 icalcomponent_add_property(vtodo,
 661                         icalproperty_new_dtstart(
 662                                 icaltime_from_webform("dtstart")
 663                         )
 664                 );
 665
 666                 while (prop = icalcomponent_get_first_property(vtodo,
 667                       ICAL_DUE_PROPERTY), prop != NULL) {
 668                         icalcomponent_remove_property(vtodo, prop);
 669                         icalproperty_free(prop);
 670                 }
 671                 icalcomponent_add_property(vtodo,
 672                         icalproperty_new_due(
 673                                 icaltime_from_webform("due")
 674                         )
 675                 );
 676
 677                 /* Give this task a UID if it doesn't have one. */
 678                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 679                 if (icalcomponent_get_first_property(vtodo,
 680                    ICAL_UID_PROPERTY) == NULL) {
 681                         generate_uuid(buf);
 682                         icalcomponent_add_property(vtodo,
 683                                 icalproperty_new_uid(buf)
 684                         );
 685                 }
 686
 687                 /* Increment the sequence ID */
 688                 lprintf(9, "Increment the sequence ID\n");
 689                 while (prop = icalcomponent_get_first_property(vtodo,
 690                       ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 691                         i = icalproperty_get_sequence(prop);
 692                         lprintf(9, "Sequence was %d\n", i);
 693                         if (i > sequence) sequence = i;
 694                         icalcomponent_remove_property(vtodo, prop);
 695                         icalproperty_free(prop);
 696                 }
 697                 ++sequence;
 698                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 699                 icalcomponent_add_property(vtodo,
 700                         icalproperty_new_sequence(sequence)
 701                 );
 702
 703                 /*
 704                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 705                  * for two reasons: one, it's easier to just free the whole thing
 706                  * when we're done instead of unbundling, but more importantly, we
 707                  * can't encapsulate something that may already be encapsulated
 708                  * somewhere else.
 709                  */
 710                 lprintf(9, "Encapsulating into full VCALENDAR component\n");
 711                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 712
 713                 /* Serialize it and save it to the message base */
 714                 serv_puts("ENT0 1|||4");
 715                 serv_gets(buf);
 716                 if (buf[0] == '4') {
 717                         serv_puts("Content-type: text/calendar");
 718                         serv_puts("");
 719                         serv_puts(icalcomponent_as_ical_string(encaps));
 720                         serv_puts("000");
 721
 722                         /* Probably not necessary; the server will see the UID
 723                          * of the object and delete the old one anyway, but
 724                          * just in case...
 725                          */
 726                         delete_existing = 1;
 727                 }
 728                 icalcomponent_free(encaps);
 729         }
 730
 731         /*
 732          * If the user clicked 'Delete' then explicitly delete the message.
 733          */
 734         if (!strcasecmp(bstr("sc"), "Delete")) {
 735                 delete_existing = 1;
 736         }
 737
 738         if ( (delete_existing) && (msgnum > 0L) ) {
 739                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 740                 serv_gets(buf);
 741         }
 742
 743         if (created_new_vtodo) {
 744                 icalcomponent_free(vtodo);
 745         }
 746
 747         /* Go back to the task list */
 748         readloop("readfwd");
 749 }
 750
 751
 752
 753 /*
 754  * Code common to all display handlers.  Given a message number and a MIME
 755  * type, we load the message and hunt for that MIME type.  If found, we load
 756  * the relevant part, deserialize it into a libical component, filter it for
 757  * the requested object type, and feed it to the specified handler.
 758  *
 759  */
 760 void display_using_handler(long msgnum,
 761                         char *mimetype,
 762                         icalcomponent_kind which_kind,
 763                         void (*callback)(icalcomponent *, long)
 764         ) {
 765         char buf[SIZ];
 766         char mime_partnum[SIZ];
 767         char mime_filename[SIZ];
 768         char mime_content_type[SIZ];
 769         char mime_disposition[SIZ];
 770         int mime_length;
 771         char relevant_partnum[SIZ];
 772         char *relevant_source = NULL;
 773         icalcomponent *cal, *c;
 774
 775         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 776         serv_puts(buf);
 777         serv_gets(buf);
 778         if (buf[0] != '1') return;
 779
 780         while (serv_gets(buf), strcmp(buf, "000")) {
 781                 if (!strncasecmp(buf, "part=", 5)) {
 782                         extract(mime_filename, &buf[5], 1);
 783                         extract(mime_partnum, &buf[5], 2);
 784                         extract(mime_disposition, &buf[5], 3);
 785                         extract(mime_content_type, &buf[5], 4);
 786                         mime_length = extract_int(&buf[5], 5);
 787
 788                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 789                                 strcpy(relevant_partnum, mime_partnum);
 790                         }
 791
 792                 }
 793         }
 794
 795         if (strlen(relevant_partnum) > 0) {
 796                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 797                 if (relevant_source != NULL) {
 798
 799                         cal = icalcomponent_new_from_string(relevant_source);
 800                         if (cal != NULL) {
 801
 802                                 ical_dezonify(cal);
 803
 804                                 /* Simple components of desired type */
 805                                 if (icalcomponent_isa(cal) == which_kind) {
 806                                         callback(cal, msgnum);
 807                                 }
 808
 809                                 /* Subcomponents of desired type */
 810                                 for (c = icalcomponent_get_first_component(cal,
 811                                     which_kind);
 812                                     (c != 0);
 813                                     c = icalcomponent_get_next_component(cal,
 814                                     which_kind)) {
 815                                         callback(c, msgnum);
 816                                 }
 817                                 icalcomponent_free(cal);
 818                         }
 819                         free(relevant_source);
 820                 }
 821         }
 822
 823 }
 824
 825 void display_calendar(long msgnum) {
 826         display_using_handler(msgnum, "text/calendar",
 827                                 ICAL_VEVENT_COMPONENT,
 828                                 display_individual_cal);
 829 }
 830
 831 void display_task(long msgnum) {
 832         display_using_handler(msgnum, "text/calendar",
 833                                 ICAL_VTODO_COMPONENT,
 834                                 display_individual_cal);
 835 }
 836
 837 void display_edit_task(void) {
 838         long msgnum = 0L;
 839
 840         /* Force change the room if we have to */
 841         if (strlen(bstr("taskrm")) > 0) {
 842                 gotoroom(bstr("taskrm"));
 843         }
 844
 845         msgnum = atol(bstr("msgnum"));
 846         if (msgnum > 0L) {
 847                 /* existing task */
 848                 display_using_handler(msgnum, "text/calendar",
 849                                 ICAL_VTODO_COMPONENT,
 850                                 display_edit_individual_task);
 851         }
 852         else {
 853                 /* new task */
 854                 display_edit_individual_task(NULL, 0L);
 855         }
 856 }
 857
 858 void save_task(void) {
 859         long msgnum = 0L;
 860
 861         msgnum = atol(bstr("msgnum"));
 862         if (msgnum > 0L) {
 863                 display_using_handler(msgnum, "text/calendar",
 864                                 ICAL_VTODO_COMPONENT,
 865                                 save_individual_task);
 866         }
 867         else {
 868                 save_individual_task(NULL, 0L);
 869         }
 870 }
 871
 872 void display_edit_event(void) {
 873         long msgnum = 0L;
 874
 875         msgnum = atol(bstr("msgnum"));
 876         if (msgnum > 0L) {
 877                 /* existing event */
 878                 display_using_handler(msgnum, "text/calendar",
 879                                 ICAL_VEVENT_COMPONENT,
 880                                 display_edit_individual_event);
 881         }
 882         else {
 883                 /* new event */
 884                 display_edit_individual_event(NULL, 0L);
 885         }
 886 }
 887
 888 void save_event(void) {
 889         long msgnum = 0L;
 890
 891         msgnum = atol(bstr("msgnum"));
 892
 893         if (msgnum > 0L) {
 894                 display_using_handler(msgnum, "text/calendar",
 895                                 ICAL_VEVENT_COMPONENT,
 896                                 save_individual_event);
 897         }
 898         else {
 899                 save_individual_event(NULL, 0L);
 900         }
 901 }
 902
 903
 904
 905
 906
 907 /*
 908  * freebusy display (for client software)
 909  */
 910 void do_freebusy(char *req) {
 911         char who[SIZ];
 912         char buf[SIZ];
 913         char *fb;
 914
 915         extract_token(who, req, 1, ' ');
 916         if (!strncasecmp(who, "/freebusy/", 10)) {
 917                 strcpy(who, &who[10]);
 918         }
 919         unescape_input(who);
 920
 921         if ( (!strcasecmp(&who[strlen(who)-4], ".vcf"))
 922            || (!strcasecmp(&who[strlen(who)-4], ".vfb")) ) {
 923                 who[strlen(who)-4] = 0;
 924         }
 925
 926         lprintf(9, "freebusy requested for <%s>\n", who);
 927         serv_printf("ICAL freebusy|%s", who);
 928         serv_gets(buf);
 929
 930         if (buf[0] != '1') {
 931                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 932                 output_headers(0, 0, 0, 0, 0, 0, 0);
 933                 wprintf("Content-Type: text/plain\n");
 934                 wprintf("\n");
 935                 wprintf("%s\n", &buf[4]);
 936                 return;
 937         }
 938
 939         fb = read_server_text();
 940         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
 941         free(fb);
 942 }
 943
 944
 945
 946 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */