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