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/calarea_48x.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/calarea_48x.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/calarea_48x.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, 0);
 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, 0);
 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_getln(buf, sizeof buf);
 233                 if (buf[0] == '1') {
 234                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 235                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 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>How would you like to respond to this invitation?</td>"
 263                         "<td><FONT SIZE=+1>"
 264                         "<A HREF=\"/respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Accept\">Accept</a>"
 265                         " | "
 266                         "<A HREF=\"/respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Tentative\">Tentative</a>"
 267                         " | "
 268                         "<A HREF=\"/respond_to_request?msgnum=%ld&cal_partnum=%s&sc=Decline\">Decline</a>"
 269                         "</FONT></TD></TR>\n",
 270                         msgnum, cal_partnum,
 271                         msgnum, cal_partnum,
 272                         msgnum, cal_partnum
 273                 );
 274
 275         }
 276
 277         /* If this is a REPLY, display update button */
 278         if (the_method == ICAL_METHOD_REPLY) {
 279
 280                 /***********
 281                  * In the future, if we want to validate this object before
 282                  * continuing, we can do it this way:
 283                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 284                 serv_getln(buf, sizeof buf);
 285                 }
 286                  ***********/
 287
 288                 /* Display the update buttons */
 289                 wprintf("<TR><TD>"
 290                         "Click <i>Update</i> to accept this reply and "
 291                         "update your calendar."
 292                         "</td><td><font size=+1>"
 293                         "<a href=\"/handle_rsvp?msgnum=%ld&cal_partnum=%s&sc=Update\">Update</a>"
 294                         " | "
 295                         "<a href=\"/handle_rsvp?msgnum=%ld&cal_partnum=%s&sc=Ignore\">Ignore</a>"
 296                         "</font>"
 297                         "</TD></TR>\n",
 298                         msgnum, cal_partnum,
 299                         msgnum, cal_partnum
 300                 );
 301
 302         }
 303
 304         /* Trailing HTML for the display of this object */
 305         if (recursion_level == 0) {
 306
 307                 wprintf("</TR></TABLE></CENTER>\n");
 308         }
 309 }
 310
 311
 312 /*
 313  * Deserialize a calendar object in a message so it can be processed.
 314  * (This is the main entry point for these things)
 315  */
 316 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 317         icalcomponent *cal;
 318
 319         cal = icalcomponent_new_from_string(part_source);
 320
 321         if (cal == NULL) {
 322                 wprintf("Error parsing calendar object<br />\n");
 323                 return;
 324         }
 325
 326         ical_dezonify(cal);
 327         cal_process_object(cal, 0, msgnum, cal_partnum);
 328
 329         /* Free the memory we obtained from libical's constructor */
 330         icalcomponent_free(cal);
 331 }
 332
 333
 334
 335
 336 /*
 337  * Respond to a meeting request
 338  */
 339 void respond_to_request(void) {
 340         char buf[SIZ];
 341
 342         output_headers(1, 1, 2, 0, 0, 0, 0);
 343
 344         wprintf("<div id=\"banner\">\n");
 345         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 346                 "<SPAN CLASS=\"titlebar\">Respond to meeting request</SPAN>"
 347                 "</TD></TR></TABLE>\n"
 348         );
 349         wprintf("</div>\n<div id=\"content\">\n");
 350
 351         serv_printf("ICAL respond|%s|%s|%s|",
 352                 bstr("msgnum"),
 353                 bstr("cal_partnum"),
 354                 bstr("sc")
 355         );
 356         serv_getln(buf, sizeof buf);
 357
 358         if (buf[0] == '2') {
 359                 wprintf("<TABLE BORDER=0><TR><TD>"
 360                         "<IMG SRC=\"static/calarea_48x.gif\" ALIGN=CENTER>"
 361                         "</TD><TD>"
 362                 );
 363                 if (!strcasecmp(bstr("sc"), "accept")) {
 364                         wprintf("You have accepted this meeting invitation.  "
 365                                 "It has been entered into your calendar, "
 366                         );
 367                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 368                         wprintf("You have tentatively accepted this meeting invitation.  "
 369                                 "It has been 'pencilled in' to your calendar, "
 370                         );
 371                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 372                         wprintf("You have declined this meeting invitation.  "
 373                                 "It has <b>not</b> been entered into your calendar, "
 374                         );
 375                 }
 376                 wprintf("and a reply has been sent to the meeting organizer."
 377                         "</TD></TR></TABLE>\n"
 378                 );
 379         } else {
 380                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 381                         "%s\n", &buf[4]);
 382         }
 383
 384         wprintf("<A HREF=\"/dotskip?room=");
 385         urlescputs(WC->wc_roomname);
 386         wprintf("\"><br />Return to messages</A><br />\n");
 387
 388         wDumpContent(1);
 389 }
 390
 391
 392
 393 /*
 394  * Handle an incoming RSVP
 395  */
 396 void handle_rsvp(void) {
 397         char buf[SIZ];
 398
 399         output_headers(1, 1, 2, 0, 0, 0, 0);
 400
 401         wprintf("<div id=\"banner\">\n");
 402         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 403                 "<SPAN CLASS=\"titlebar\">"
 404                 "Update your calendar with this RSVP</SPAN>"
 405                 "</TD></TR></TABLE>\n"
 406                 "</div>\n<div id=\"content\">\n"
 407         );
 408
 409         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 410                 bstr("msgnum"),
 411                 bstr("cal_partnum"),
 412                 bstr("sc")
 413         );
 414         serv_getln(buf, sizeof buf);
 415
 416         if (buf[0] == '2') {
 417                 wprintf("<TABLE BORDER=0><TR><TD>"
 418                         "<IMG SRC=\"static/calarea_48x.gif\" ALIGN=CENTER>"
 419                         "</TD><TD>"
 420                 );
 421                 if (!strcasecmp(bstr("sc"), "update")) {
 422                         wprintf("Your calendar has been updated "
 423                                 "to reflect this RSVP."
 424                         );
 425                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 426                         wprintf("You have chosen to ignore this RSVP. "
 427                                 "Your calendar has <b>not</b> been updated."
 428                         );
 429                 }
 430                 wprintf("</TD></TR></TABLE>\n"
 431                 );
 432         } else {
 433                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 434                         "%s\n", &buf[4]);
 435         }
 436
 437         wprintf("<A HREF=\"/dotskip?room=");
 438         urlescputs(WC->wc_roomname);
 439         wprintf("\"><br />Return to messages</A><br />\n");
 440
 441         wDumpContent(1);
 442 }
 443
 444
 445
 446
 447 /*****************************************************************************/
 448
 449
 450
 451 /*
 452  * Display handlers for message reading
 453  */
 454
 455
 456
 457 /*
 458  * If we're reading calendar items, just store them for now.  We have to
 459  * sort and re-output them later when we draw the calendar.
 460  */
 461 void display_individual_cal(icalcomponent *cal, long msgnum) {
 462
 463         WC->num_cal += 1;
 464
 465         WC->disp_cal = realloc(WC->disp_cal,
 466                         (sizeof(struct disp_cal) * WC->num_cal) );
 467         WC->disp_cal[WC->num_cal - 1].cal = icalcomponent_new_clone(cal);
 468
 469         WC->disp_cal[WC->num_cal - 1].cal_msgnum = msgnum;
 470 }
 471
 472
 473
 474 /*
 475  * Display a task by itself (for editing)
 476  *
 477  */
 478 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 479         icalcomponent *vtodo;
 480         icalproperty *p;
 481         struct icaltimetype t;
 482         time_t now;
 483         int created_new_vtodo = 0;
 484
 485         now = time(NULL);
 486
 487         if (supplied_vtodo != NULL) {
 488                 vtodo = supplied_vtodo;
 489
 490                 /* If we're looking at a fully encapsulated VCALENDAR
 491                  * rather than a VTODO component, attempt to use the first
 492                  * relevant VTODO subcomponent.  If there is none, the
 493                  * NULL returned by icalcomponent_get_first_component() will
 494                  * tell the next iteration of this function to create a
 495                  * new one.
 496                  */
 497                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 498                         display_edit_individual_task(
 499                                 icalcomponent_get_first_component(
 500                                         vtodo, ICAL_VTODO_COMPONENT
 501                                 ), msgnum
 502                         );
 503                         return;
 504                 }
 505         }
 506         else {
 507                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 508                 created_new_vtodo = 1;
 509         }
 510
 511         output_headers(1, 1, 2, 0, 0, 0, 0);
 512         wprintf("<div id=\"banner\">\n"
 513                 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR>"
 514                 "<TD><IMG SRC=\"/static/taskmanag_48x.gif\"></TD>"
 515                 "<td><SPAN CLASS=\"titlebar\">Edit task</SPAN>"
 516                 "</TD></TR></TABLE>\n"
 517                 "</div>\n<div id=\"content\">\n"
 518         );
 519
 520         wprintf("<div id=\"fix_scrollbar_bug\">"
 521                 "<table border=0 width=100%% bgcolor=\"#ffffff\"><tr><td>");
 522
 523         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 524         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 525                 msgnum);
 526
 527         wprintf("<TABLE border=0>\n");
 528
 529         wprintf("<TR><TD>Summary:</TD><TD>"
 530                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 531                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 532         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 533         if (p != NULL) {
 534                 escputs((char *)icalproperty_get_comment(p));
 535         }
 536         wprintf("\"></TD></TR>\n");
 537
 538         wprintf("<TR><TD>Start date:</TD><TD>");
 539         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 540         if (p != NULL) {
 541                 t = icalproperty_get_dtstart(p);
 542         }
 543         else {
 544                 t = icaltime_from_timet(now, 0);
 545         }
 546         display_icaltimetype_as_webform(&t, "dtstart");
 547         wprintf("</TD></TR>\n");
 548
 549         wprintf("<TR><TD>Due date:</TD><TD>");
 550         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 551         if (p != NULL) {
 552                 t = icalproperty_get_due(p);
 553         }
 554         else {
 555                 t = icaltime_from_timet(now, 0);
 556         }
 557         display_icaltimetype_as_webform(&t, "due");
 558         wprintf("</TD></TR>\n");
 559         wprintf("<TR><TD>Description:</TD><TD>");
 560         wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
 561                 "ROWS=10 COLS=80 WIDTH=80>\n"
 562         );
 563         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 564         if (p != NULL) {
 565                 escputs((char *)icalproperty_get_comment(p));
 566         }
 567         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 568
 569         wprintf("<CENTER>"
 570                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 571                 "&nbsp;&nbsp;"
 572                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 573                 "&nbsp;&nbsp;"
 574                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 575                 "</CENTER>\n"
 576         );
 577
 578         wprintf("</FORM>\n");
 579
 580         wprintf("</td></tr></table></div>\n");
 581         wDumpContent(1);
 582
 583         if (created_new_vtodo) {
 584                 icalcomponent_free(vtodo);
 585         }
 586 }
 587
 588 /*
 589  * Save an edited task
 590  *
 591  */
 592 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 593         char buf[SIZ];
 594         int delete_existing = 0;
 595         icalproperty *prop;
 596         icalcomponent *vtodo, *encaps;
 597         int created_new_vtodo = 0;
 598         int i;
 599         int sequence = 0;
 600         struct icaltimetype t;
 601
 602         if (supplied_vtodo != NULL) {
 603                 vtodo = supplied_vtodo;
 604                 /* If we're looking at a fully encapsulated VCALENDAR
 605                  * rather than a VTODO component, attempt to use the first
 606                  * relevant VTODO subcomponent.  If there is none, the
 607                  * NULL returned by icalcomponent_get_first_component() will
 608                  * tell the next iteration of this function to create a
 609                  * new one.
 610                  */
 611                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 612                         save_individual_task(
 613                                 icalcomponent_get_first_component(
 614                                         vtodo, ICAL_VTODO_COMPONENT
 615                                 ), msgnum
 616                         );
 617                         return;
 618                 }
 619         }
 620         else {
 621                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 622                 created_new_vtodo = 1;
 623         }
 624
 625         if (!strcasecmp(bstr("sc"), "Save")) {
 626
 627                 /* Replace values in the component with ones from the form */
 628
 629                 while (prop = icalcomponent_get_first_property(vtodo,
 630                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 631                         icalcomponent_remove_property(vtodo, prop);
 632                         icalproperty_free(prop);
 633                 }
 634                 icalcomponent_add_property(vtodo,
 635                         icalproperty_new_summary(bstr("summary")));
 636
 637                 while (prop = icalcomponent_get_first_property(vtodo,
 638                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 639                         icalcomponent_remove_property(vtodo, prop);
 640                         icalproperty_free(prop);
 641                 }
 642                 icalcomponent_add_property(vtodo,
 643                         icalproperty_new_description(bstr("description")));
 644
 645                 while (prop = icalcomponent_get_first_property(vtodo,
 646                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 647                         icalcomponent_remove_property(vtodo, prop);
 648                         icalproperty_free(prop);
 649                 }
 650                 icaltime_from_webform(&t, "dtstart");
 651                 icalcomponent_add_property(vtodo,
 652                         icalproperty_new_dtstart(t)
 653                 );
 654
 655                 while (prop = icalcomponent_get_first_property(vtodo,
 656                       ICAL_DUE_PROPERTY), prop != NULL) {
 657                         icalcomponent_remove_property(vtodo, prop);
 658                         icalproperty_free(prop);
 659                 }
 660                 icaltime_from_webform(&t, "due");
 661                 icalcomponent_add_property(vtodo,
 662                         icalproperty_new_due(t)
 663                 );
 664
 665                 /* Give this task a UID if it doesn't have one. */
 666                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 667                 if (icalcomponent_get_first_property(vtodo,
 668                    ICAL_UID_PROPERTY) == NULL) {
 669                         generate_uuid(buf);
 670                         icalcomponent_add_property(vtodo,
 671                                 icalproperty_new_uid(buf)
 672                         );
 673                 }
 674
 675                 /* Increment the sequence ID */
 676                 lprintf(9, "Increment the sequence ID\n");
 677                 while (prop = icalcomponent_get_first_property(vtodo,
 678                       ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 679                         i = icalproperty_get_sequence(prop);
 680                         lprintf(9, "Sequence was %d\n", i);
 681                         if (i > sequence) sequence = i;
 682                         icalcomponent_remove_property(vtodo, prop);
 683                         icalproperty_free(prop);
 684                 }
 685                 ++sequence;
 686                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 687                 icalcomponent_add_property(vtodo,
 688                         icalproperty_new_sequence(sequence)
 689                 );
 690
 691                 /*
 692                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 693                  * for two reasons: one, it's easier to just free the whole thing
 694                  * when we're done instead of unbundling, but more importantly, we
 695                  * can't encapsulate something that may already be encapsulated
 696                  * somewhere else.
 697                  */
 698                 lprintf(9, "Encapsulating into full VCALENDAR component\n");
 699                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 700
 701                 /* Serialize it and save it to the message base */
 702                 serv_puts("ENT0 1|||4");
 703                 serv_getln(buf, sizeof buf);
 704                 if (buf[0] == '4') {
 705                         serv_puts("Content-type: text/calendar");
 706                         serv_puts("");
 707                         serv_puts(icalcomponent_as_ical_string(encaps));
 708                         serv_puts("000");
 709
 710                         /* Probably not necessary; the server will see the UID
 711                          * of the object and delete the old one anyway, but
 712                          * just in case...
 713                          */
 714                         delete_existing = 1;
 715                 }
 716                 icalcomponent_free(encaps);
 717         }
 718
 719         /*
 720          * If the user clicked 'Delete' then explicitly delete the message.
 721          */
 722         if (!strcasecmp(bstr("sc"), "Delete")) {
 723                 delete_existing = 1;
 724         }
 725
 726         if ( (delete_existing) && (msgnum > 0L) ) {
 727                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 728                 serv_getln(buf, sizeof buf);
 729         }
 730
 731         if (created_new_vtodo) {
 732                 icalcomponent_free(vtodo);
 733         }
 734
 735         /* Go back to the task list */
 736         readloop("readfwd");
 737 }
 738
 739
 740
 741 /*
 742  * Code common to all display handlers.  Given a message number and a MIME
 743  * type, we load the message and hunt for that MIME type.  If found, we load
 744  * the relevant part, deserialize it into a libical component, filter it for
 745  * the requested object type, and feed it to the specified handler.
 746  *
 747  */
 748 void display_using_handler(long msgnum,
 749                         char *mimetype,
 750                         icalcomponent_kind which_kind,
 751                         void (*callback)(icalcomponent *, long)
 752         ) {
 753         char buf[SIZ];
 754         char mime_partnum[SIZ];
 755         char mime_filename[SIZ];
 756         char mime_content_type[SIZ];
 757         char mime_disposition[SIZ];
 758         int mime_length;
 759         char relevant_partnum[SIZ];
 760         char *relevant_source = NULL;
 761         icalcomponent *cal, *c;
 762
 763         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 764         serv_puts(buf);
 765         serv_getln(buf, sizeof buf);
 766         if (buf[0] != '1') return;
 767
 768         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 769                 if (!strncasecmp(buf, "part=", 5)) {
 770                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 771                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 772                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 773                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 774                         mime_length = extract_int(&buf[5], 5);
 775
 776                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 777                                 strcpy(relevant_partnum, mime_partnum);
 778                         }
 779
 780                 }
 781         }
 782
 783         if (strlen(relevant_partnum) > 0) {
 784                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 785                 if (relevant_source != NULL) {
 786
 787                         cal = icalcomponent_new_from_string(relevant_source);
 788                         if (cal != NULL) {
 789
 790                                 ical_dezonify(cal);
 791
 792                                 /* Simple components of desired type */
 793                                 if (icalcomponent_isa(cal) == which_kind) {
 794                                         callback(cal, msgnum);
 795                                 }
 796
 797                                 /* Subcomponents of desired type */
 798                                 for (c = icalcomponent_get_first_component(cal,
 799                                     which_kind);
 800                                     (c != 0);
 801                                     c = icalcomponent_get_next_component(cal,
 802                                     which_kind)) {
 803                                         callback(c, msgnum);
 804                                 }
 805                                 icalcomponent_free(cal);
 806                         }
 807                         free(relevant_source);
 808                 }
 809         }
 810
 811 }
 812
 813 void display_calendar(long msgnum) {
 814         display_using_handler(msgnum, "text/calendar",
 815                                 ICAL_VEVENT_COMPONENT,
 816                                 display_individual_cal);
 817 }
 818
 819 void display_task(long msgnum) {
 820         display_using_handler(msgnum, "text/calendar",
 821                                 ICAL_VTODO_COMPONENT,
 822                                 display_individual_cal);
 823 }
 824
 825 void display_edit_task(void) {
 826         long msgnum = 0L;
 827
 828         /* Force change the room if we have to */
 829         if (strlen(bstr("taskrm")) > 0) {
 830                 gotoroom(bstr("taskrm"));
 831         }
 832
 833         msgnum = atol(bstr("msgnum"));
 834         if (msgnum > 0L) {
 835                 /* existing task */
 836                 display_using_handler(msgnum, "text/calendar",
 837                                 ICAL_VTODO_COMPONENT,
 838                                 display_edit_individual_task);
 839         }
 840         else {
 841                 /* new task */
 842                 display_edit_individual_task(NULL, 0L);
 843         }
 844 }
 845
 846 void save_task(void) {
 847         long msgnum = 0L;
 848
 849         msgnum = atol(bstr("msgnum"));
 850         if (msgnum > 0L) {
 851                 display_using_handler(msgnum, "text/calendar",
 852                                 ICAL_VTODO_COMPONENT,
 853                                 save_individual_task);
 854         }
 855         else {
 856                 save_individual_task(NULL, 0L);
 857         }
 858 }
 859
 860 void display_edit_event(void) {
 861         long msgnum = 0L;
 862
 863         msgnum = atol(bstr("msgnum"));
 864         if (msgnum > 0L) {
 865                 /* existing event */
 866                 display_using_handler(msgnum, "text/calendar",
 867                                 ICAL_VEVENT_COMPONENT,
 868                                 display_edit_individual_event);
 869         }
 870         else {
 871                 /* new event */
 872                 display_edit_individual_event(NULL, 0L);
 873         }
 874 }
 875
 876 void save_event(void) {
 877         long msgnum = 0L;
 878
 879         msgnum = atol(bstr("msgnum"));
 880
 881         if (msgnum > 0L) {
 882                 display_using_handler(msgnum, "text/calendar",
 883                                 ICAL_VEVENT_COMPONENT,
 884                                 save_individual_event);
 885         }
 886         else {
 887                 save_individual_event(NULL, 0L);
 888         }
 889 }
 890
 891
 892
 893
 894
 895 /*
 896  * freebusy display (for client software)
 897  */
 898 void do_freebusy(char *req) {
 899         char who[SIZ];
 900         char buf[SIZ];
 901         char *fb;
 902
 903         extract_token(who, req, 1, ' ', sizeof who);
 904         if (!strncasecmp(who, "/freebusy/", 10)) {
 905                 strcpy(who, &who[10]);
 906         }
 907         unescape_input(who);
 908
 909         if ( (!strcasecmp(&who[strlen(who)-4], ".vcf"))
 910            || (!strcasecmp(&who[strlen(who)-4], ".ifb"))
 911            || (!strcasecmp(&who[strlen(who)-4], ".vfb")) ) {
 912                 who[strlen(who)-4] = 0;
 913         }
 914
 915         lprintf(9, "freebusy requested for <%s>\n", who);
 916         serv_printf("ICAL freebusy|%s", who);
 917         serv_getln(buf, sizeof buf);
 918
 919         if (buf[0] != '1') {
 920                 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
 921                 output_headers(0, 0, 0, 0, 0, 0, 0);
 922                 wprintf("Content-Type: text/plain\r\n");
 923                 wprintf("\r\n");
 924                 wprintf("%s\n", &buf[4]);
 925                 return;
 926         }
 927
 928         fb = read_server_text();
 929         http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
 930         free(fb);
 931 }
 932
 933
 934
 935 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */