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 HAVE_ICAL_H
  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 /* HAVE_ICAL_H */
  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 void cal_process_object(icalcomponent *cal,
  75                         int recursion_level,
  76                         long msgnum,
  77                         char *cal_partnum
  78 ) {
  79         icalcomponent *c;
  80         icalproperty *method = NULL;
  81         icalproperty_method the_method = ICAL_METHOD_NONE;
  82         icalproperty *p;
  83         struct icaltimetype t;
  84         time_t tt;
  85         char buf[SIZ];
  86         char conflict_name[SIZ];
  87         int is_update = 0;
  88
  89         /* Leading HTML for the display of this object */
  90         if (recursion_level == 0) {
  91                 wprintf("<CENTER><TABLE border=0>\n");
  92         }
  93
  94         /* Look for a method */
  95         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  96
  97         /* See what we need to do with this */
  98         if (method != NULL) {
  99                 the_method = icalproperty_get_method(method);
 100                 switch(the_method) {
 101                     case ICAL_METHOD_REQUEST:
 102                         wprintf("<TR><TD COLSPAN=2>\n"
 103                                 "<IMG ALIGN=CENTER "
 104                                 "SRC=\"/static/vcalendar.gif\">"
 105                                 "&nbsp;&nbsp;"
 106                                 "<B>Meeting invitation</B>
 107                                 </TD></TR>\n"
 108                         );
 109                         break;
 110                     case ICAL_METHOD_REPLY:
 111                         wprintf("<TR><TD COLSPAN=2>\n"
 112                                 "<IMG ALIGN=CENTER "
 113                                 "SRC=\"/static/vcalendar.gif\">"
 114                                 "&nbsp;&nbsp;"
 115                                 "<B>Attendee's reply to your invitation</B>
 116                                 </TD></TR>\n"
 117                         );
 118                         break;
 119                     case ICAL_METHOD_PUBLISH:
 120                         wprintf("<TR><TD COLSPAN=2>\n"
 121                                 "<IMG ALIGN=CENTER "
 122                                 "SRC=\"/static/vcalendar.gif\">"
 123                                 "&nbsp;&nbsp;"
 124                                 "<B>Published event</B>
 125                                 </TD></TR>\n"
 126                         );
 127                         break;
 128                     default:
 129                         wprintf("<TR><TD COLSPAN=2>"
 130                                 "I don't know what to do with this.</TD></TR>"
 131                                 "\n");
 132                         break;
 133                 }
 134         }
 135
 136         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 137         if (p != NULL) {
 138                 wprintf("<TR><TD><B>Summary:</B></TD><TD>");
 139                 escputs((char *)icalproperty_get_comment(p));
 140                 wprintf("</TD></TR>\n");
 141         }
 142
 143         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 144         if (p != NULL) {
 145                 wprintf("<TR><TD><B>Location:</B></TD><TD>");
 146                 escputs((char *)icalproperty_get_comment(p));
 147                 wprintf("</TD></TR>\n");
 148         }
 149
 150         /*
 151          * Only show start/end times if we're actually looking at the VEVENT
 152          * component.  Otherwise it shows bogus dates for things like timezone.
 153          */
 154         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 155
 156                 p = icalcomponent_get_first_property(cal,
 157                                                 ICAL_DTSTART_PROPERTY);
 158                 if (p != NULL) {
 159                         t = icalproperty_get_dtstart(p);
 160
 161                         if (t.is_date) {
 162                                 wprintf("<TR><TD><B>Date:"
 163                                         "</B></TD><TD>"
 164                                         "%s %d, %d</TD></TR>",
 165                                         months[t.month - 1],
 166                                         t.day, t.year
 167                                 );
 168                         }
 169                         else {
 170                                 tt = icaltime_as_timet(t);
 171                                 fmt_date(buf, tt);
 172                                 wprintf("<TR><TD><B>Starting date/time:"
 173                                         "</B></TD><TD>"
 174                                         "%s</TD></TR>", buf
 175                                 );
 176                         }
 177                 }
 178
 179                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 180                 if (p != NULL) {
 181                         t = icalproperty_get_dtend(p);
 182                         tt = icaltime_as_timet(t);
 183                         fmt_date(buf, tt);
 184                         wprintf("<TR><TD><B>Ending date/time:</B></TD><TD>"
 185                                 "%s</TD></TR>", buf
 186                         );
 187                 }
 188
 189         }
 190
 191         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 192         if (p != NULL) {
 193                 wprintf("<TR><TD><B>Description:</B></TD><TD>");
 194                 escputs((char *)icalproperty_get_comment(p));
 195                 wprintf("</TD></TR>\n");
 196         }
 197
 198         /* If the component has attendees, iterate through them. */
 199         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 200                 wprintf("<TR><TD><B>Attendee:</B></TD><TD>");
 201                 strcpy(buf, icalproperty_get_attendee(p));
 202                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 203
 204                         /* screen name or email address */
 205                         strcpy(buf, &buf[7]);
 206                         striplt(buf);
 207                         escputs(buf);
 208                         wprintf(" ");
 209
 210                         /* participant status */
 211                         partstat_as_string(buf, p);
 212                         escputs(buf);
 213                 }
 214                 wprintf("</TD></TR>\n");
 215         }
 216
 217         /* If the component has subcomponents, recurse through them. */
 218         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 219             (c != 0);
 220             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 221                 /* Recursively process subcomponent */
 222                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 223         }
 224
 225         /* If this is a REQUEST, display conflicts and buttons */
 226         if (the_method == ICAL_METHOD_REQUEST) {
 227
 228                 /* Check for conflicts */
 229                 lprintf(9, "Checking server calendar for conflicts...\n");
 230                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 231                 serv_gets(buf);
 232                 if (buf[0] == '1') {
 233                         while (serv_gets(buf), strcmp(buf, "000")) {
 234                                 extract(conflict_name, buf, 3);
 235                                 is_update = extract_int(buf, 4);
 236                                 wprintf("<TR><TD><B><I>%s</I></B></TD>"
 237                                         "<TD>"
 238                                         "%s "
 239                                         "<I>&quot;",
 240
 241                                         (is_update ?
 242                                                 "Update:" :
 243                                                 "CONFLICT:"
 244                                         ),
 245
 246                                         (is_update ?
 247                                                 "This is an update of" :
 248                                                 "This event would conflict with"
 249                                         )
 250
 251                                 );
 252                                 escputs(conflict_name);
 253                                 wprintf("&quot;</I> "
 254                                         "which is already in your calendar."
 255                                         "</TD></TR>\n");
 256                         }
 257                 }
 258                 lprintf(9, "...done.\n");
 259
 260                 /* Display the Accept/Decline buttons */
 261                 wprintf("<TR><TD COLSPAN=2>"
 262                         "<FORM METHOD=\"GET\" "
 263                         "ACTION=\"/respond_to_request\">\n"
 264                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 265                                 "VALUE=\"Accept\">\n"
 266                         "&nbsp;&nbsp;"
 267                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 268                                 "VALUE=\"Tentative\">\n"
 269                         "&nbsp;&nbsp;"
 270                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 271                                 "VALUE=\"Decline\">\n"
 272                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 273                                 "VALUE=\"%ld\">"
 274                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 275                                 "VALUE=\"%s\">"
 276                         "</FORM>"
 277                         "</TD></TR>\n",
 278                         msgnum, cal_partnum
 279                 );
 280
 281         }
 282
 283         /* If this is a REPLY, display update button */
 284         if (the_method == ICAL_METHOD_REPLY) {
 285
 286                 /***********
 287                  * In the future, if we want to validate this object before
 288                  * continuing, we can do it this way:
 289                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 290                 serv_gets(buf);
 291                 }
 292                  ***********/
 293
 294                 /* Display the update buttons */
 295                 wprintf("<TR><TD COLSPAN=2>"
 296                         "Click <i>Update</i> to accept this reply and "
 297                         "update your calendar."
 298                         "<FORM METHOD=\"GET\" "
 299                         "ACTION=\"/handle_rsvp\">\n"
 300                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 301                                 "VALUE=\"Update\">\n"
 302                         "&nbsp;&nbsp;"
 303                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 304                                 "VALUE=\"Ignore\">\n"
 305                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 306                                 "VALUE=\"%ld\">"
 307                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 308                                 "VALUE=\"%s\">"
 309                         "</FORM>"
 310                         "</TD></TR>\n",
 311                         msgnum, cal_partnum
 312                 );
 313
 314         }
 315
 316         /* Trailing HTML for the display of this object */
 317         if (recursion_level == 0) {
 318
 319                 wprintf("</TR></TABLE></CENTER>\n");
 320         }
 321 }
 322
 323
 324 /*
 325  * Deserialize a calendar object in a message so it can be processed.
 326  * (This is the main entry point for these things)
 327  */
 328 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 329         icalcomponent *cal;
 330
 331         cal = icalcomponent_new_from_string(part_source);
 332
 333         if (cal == NULL) {
 334                 wprintf("Error parsing calendar object<BR>\n");
 335                 return;
 336         }
 337
 338         ical_dezonify(cal);
 339         cal_process_object(cal, 0, msgnum, cal_partnum);
 340
 341         /* Free the memory we obtained from libical's constructor */
 342         icalcomponent_free(cal);
 343 }
 344
 345
 346
 347
 348 /*
 349  * Respond to a meeting request
 350  */
 351 void respond_to_request(void) {
 352         char buf[SIZ];
 353
 354         output_headers(3);
 355
 356         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 357                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 358                 "<B>Respond to meeting request</B>"
 359                 "</FONT></TD></TR></TABLE><BR>\n"
 360         );
 361
 362         serv_printf("ICAL respond|%s|%s|%s|",
 363                 bstr("msgnum"),
 364                 bstr("cal_partnum"),
 365                 bstr("sc")
 366         );
 367         serv_gets(buf);
 368
 369         if (buf[0] == '2') {
 370                 wprintf("<TABLE BORDER=0><TR><TD>"
 371                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 372                         "</TD><TD>"
 373                 );
 374                 if (!strcasecmp(bstr("sc"), "accept")) {
 375                         wprintf("You have accepted this meeting invitation.  "
 376                                 "It has been entered into your calendar, "
 377                         );
 378                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 379                         wprintf("You have tentatively accepted this meeting invitation.  "
 380                                 "It has been 'pencilled in' to your calendar, "
 381                         );
 382                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 383                         wprintf("You have declined this meeting invitation.  "
 384                                 "It has <b>not</b> been entered into your calendar, "
 385                         );
 386                 }
 387                 wprintf("and a reply has been sent to the meeting organizer."
 388                         "</TD></TR></TABLE>\n"
 389                 );
 390         } else {
 391                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 392                         "%s\n", &buf[4]);
 393         }
 394
 395         wprintf("<A HREF=\"/dotskip?room=");
 396         urlescputs(WC->wc_roomname);
 397         wprintf("\"><BR>Return to messages</A><BR>\n");
 398
 399         wDumpContent(1);
 400 }
 401
 402
 403
 404 /*
 405  * Handle an incoming RSVP
 406  */
 407 void handle_rsvp(void) {
 408         char buf[SIZ];
 409
 410         output_headers(3);
 411
 412         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 413                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 414                 "<B>Update your calendar with this RSVP</B>"
 415                 "</FONT></TD></TR></TABLE><BR>\n"
 416         );
 417
 418         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 419                 bstr("msgnum"),
 420                 bstr("cal_partnum"),
 421                 bstr("sc")
 422         );
 423         serv_gets(buf);
 424
 425         if (buf[0] == '2') {
 426                 wprintf("<TABLE BORDER=0><TR><TD>"
 427                         "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
 428                         "</TD><TD>"
 429                 );
 430                 if (!strcasecmp(bstr("sc"), "update")) {
 431                         wprintf("Your calendar has been updated "
 432                                 "to reflect this RSVP."
 433                         );
 434                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 435                         wprintf("You have chosen to ignore this RSVP. "
 436                                 "Your calendar has <b>not</b> been updated."
 437                         );
 438                 }
 439                 wprintf("</TD></TR></TABLE>\n"
 440                 );
 441         } else {
 442                 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
 443                         "%s\n", &buf[4]);
 444         }
 445
 446         wprintf("<A HREF=\"/dotskip?room=");
 447         urlescputs(WC->wc_roomname);
 448         wprintf("\"><BR>Return to messages</A><BR>\n");
 449
 450         wDumpContent(1);
 451 }
 452
 453
 454
 455
 456 /*****************************************************************************/
 457
 458
 459
 460 /*
 461  * Display handlers for message reading
 462  */
 463
 464
 465
 466 /*
 467  * If we're reading calendar items, just store them for now.  We have to
 468  * sort and re-output them later when we draw the calendar.
 469  */
 470 void display_individual_cal(icalcomponent *cal, long msgnum) {
 471
 472         WC->num_cal += 1;
 473
 474         WC->disp_cal = realloc(WC->disp_cal,
 475                         (sizeof(icalcomponent *) * WC->num_cal) );
 476         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 477
 478         WC->cal_msgnum = realloc(WC->cal_msgnum,
 479                         (sizeof(long) * WC->num_cal) );
 480         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 481 }
 482
 483
 484
 485 /*
 486  * Display a task in the task list
 487  */
 488 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 489         icalproperty *p;
 490
 491         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 492         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld&taskrm=", msgnum);
 493         urlescputs(WC->wc_roomname);
 494         wprintf("\">");
 495         if (p != NULL) {
 496                 escputs((char *)icalproperty_get_comment(p));
 497         }
 498         wprintf("</A>\n");
 499 }
 500
 501
 502 /*
 503  * Display a task by itself (for editing)
 504  */
 505 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 506         icalcomponent *vtodo;
 507         icalproperty *p;
 508         struct icaltimetype t;
 509         time_t now;
 510         int created_new_vtodo = 0;
 511
 512         now = time(NULL);
 513
 514         if (supplied_vtodo != NULL) {
 515                 vtodo = supplied_vtodo;
 516         }
 517         else {
 518                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 519                 created_new_vtodo = 1;
 520         }
 521
 522         output_headers(3);
 523         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 524                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 525                 "<B>Edit task</B>"
 526                 "</FONT></TD></TR></TABLE><BR>\n"
 527         );
 528
 529         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 530         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 531                 msgnum);
 532
 533         wprintf("Summary: "
 534                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 535                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 536         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 537         if (p != NULL) {
 538                 escputs((char *)icalproperty_get_comment(p));
 539         }
 540         wprintf("\"><BR>\n");
 541
 542         wprintf("Start date: ");
 543         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 544         if (p != NULL) {
 545                 t = icalproperty_get_dtstart(p);
 546         }
 547         else {
 548                 t = icaltime_from_timet(now, 0);
 549         }
 550         display_icaltimetype_as_webform(&t, "dtstart");
 551         wprintf("<BR>\n");
 552
 553         wprintf("Due date: ");
 554         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 555         if (p != NULL) {
 556                 t = icalproperty_get_due(p);
 557         }
 558         else {
 559                 t = icaltime_from_timet(now, 0);
 560         }
 561         display_icaltimetype_as_webform(&t, "due");
 562         wprintf("<BR>\n");
 563
 564         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 565                 "ROWS=10 COLS=80 WIDTH=80>\n"
 566         );
 567         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 568         if (p != NULL) {
 569                 escputs((char *)icalproperty_get_comment(p));
 570         }
 571         wprintf("</TEXTAREA><BR>\n");
 572
 573         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 574                 "&nbsp;&nbsp;"
 575                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 576                 "&nbsp;&nbsp;"
 577                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 578                 "</CENTER>\n"
 579         );
 580
 581         wprintf("</FORM>\n");
 582
 583         wDumpContent(1);
 584
 585         if (created_new_vtodo) {
 586                 icalcomponent_free(vtodo);
 587         }
 588 }
 589
 590 /*
 591  * Save an edited task
 592  */
 593 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 594         char buf[SIZ];
 595         int delete_existing = 0;
 596         icalproperty *prop;
 597         icalcomponent *vtodo;
 598         int created_new_vtodo = 0;
 599
 600         if (supplied_vtodo != NULL) {
 601                 vtodo = supplied_vtodo;
 602         }
 603         else {
 604                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 605                 created_new_vtodo = 1;
 606         }
 607
 608         if (!strcasecmp(bstr("sc"), "Save")) {
 609
 610                 /* Replace values in the component with ones from the form */
 611
 612                 while (prop = icalcomponent_get_first_property(vtodo,
 613                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 614                         icalcomponent_remove_property(vtodo, prop);
 615                         icalproperty_free(prop);
 616                 }
 617                 icalcomponent_add_property(vtodo,
 618                         icalproperty_new_summary(bstr("summary")));
 619
 620                 while (prop = icalcomponent_get_first_property(vtodo,
 621                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 622                         icalcomponent_remove_property(vtodo, prop);
 623                         icalproperty_free(prop);
 624                 }
 625                 icalcomponent_add_property(vtodo,
 626                         icalproperty_new_description(bstr("description")));
 627
 628                 while (prop = icalcomponent_get_first_property(vtodo,
 629                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 630                         icalcomponent_remove_property(vtodo, prop);
 631                         icalproperty_free(prop);
 632                 }
 633                 icalcomponent_add_property(vtodo,
 634                         icalproperty_new_dtstart(
 635                                 icaltime_from_webform("dtstart")
 636                         )
 637                 );
 638
 639                 while (prop = icalcomponent_get_first_property(vtodo,
 640                       ICAL_DUE_PROPERTY), prop != NULL) {
 641                         icalcomponent_remove_property(vtodo, prop);
 642                         icalproperty_free(prop);
 643                 }
 644                 icalcomponent_add_property(vtodo,
 645                         icalproperty_new_due(
 646                                 icaltime_from_webform("due")
 647                         )
 648                 );
 649
 650                 /* Serialize it and save it to the message base */
 651                 serv_puts("ENT0 1|||4");
 652                 serv_gets(buf);
 653                 if (buf[0] == '4') {
 654                         serv_puts("Content-type: text/calendar");
 655                         serv_puts("");
 656                         serv_puts(icalcomponent_as_ical_string(vtodo));
 657                         serv_puts("000");
 658
 659                         /* Probably not necessary; the server will see the UID
 660                          * of the object and delete the old one anyway, but
 661                          * just in case...
 662                          */
 663                         delete_existing = 1;
 664                 }
 665         }
 666
 667         /*
 668          * If the user clicked 'Delete' then explicitly delete the message.
 669          */
 670         if (!strcasecmp(bstr("sc"), "Delete")) {
 671                 delete_existing = 1;
 672         }
 673
 674         if ( (delete_existing) && (msgnum > 0L) ) {
 675                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 676                 serv_gets(buf);
 677         }
 678
 679         if (created_new_vtodo) {
 680                 icalcomponent_free(vtodo);
 681         }
 682
 683         /* Go back to the task list */
 684         readloop("readfwd");
 685 }
 686
 687
 688
 689 /*
 690  * Code common to all display handlers.  Given a message number and a MIME
 691  * type, we load the message and hunt for that MIME type.  If found, we load
 692  * the relevant part, deserialize it into a libical component, filter it for
 693  * the requested object type, and feed it to the specified handler.
 694  */
 695 void display_using_handler(long msgnum,
 696                         char *mimetype,
 697                         icalcomponent_kind which_kind,
 698                         void (*callback)(icalcomponent *, long)
 699         ) {
 700         char buf[SIZ];
 701         char mime_partnum[SIZ];
 702         char mime_filename[SIZ];
 703         char mime_content_type[SIZ];
 704         char mime_disposition[SIZ];
 705         int mime_length;
 706         char relevant_partnum[SIZ];
 707         char *relevant_source = NULL;
 708         icalcomponent *cal, *c;
 709
 710         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 711         serv_puts(buf);
 712         serv_gets(buf);
 713         if (buf[0] != '1') return;
 714
 715         while (serv_gets(buf), strcmp(buf, "000")) {
 716                 if (!strncasecmp(buf, "part=", 5)) {
 717                         extract(mime_filename, &buf[5], 1);
 718                         extract(mime_partnum, &buf[5], 2);
 719                         extract(mime_disposition, &buf[5], 3);
 720                         extract(mime_content_type, &buf[5], 4);
 721                         mime_length = extract_int(&buf[5], 5);
 722
 723                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 724                                 strcpy(relevant_partnum, mime_partnum);
 725                         }
 726
 727                 }
 728         }
 729
 730         if (strlen(relevant_partnum) > 0) {
 731                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 732                 if (relevant_source != NULL) {
 733
 734                         cal = icalcomponent_new_from_string(relevant_source);
 735                         if (cal != NULL) {
 736
 737                                 ical_dezonify(cal);
 738
 739                                 /* Simple components of desired type */
 740                                 if (icalcomponent_isa(cal) == which_kind) {
 741                                         callback(cal, msgnum);
 742                                 }
 743
 744                                 /* Subcomponents of desired type */
 745                                 for (c = icalcomponent_get_first_component(cal,
 746                                     which_kind);
 747                                     (c != 0);
 748                                     c = icalcomponent_get_next_component(cal,
 749                                     which_kind)) {
 750                                         callback(c, msgnum);
 751                                 }
 752                                 icalcomponent_free(cal);
 753                         }
 754                         free(relevant_source);
 755                 }
 756         }
 757
 758 }
 759
 760 void display_calendar(long msgnum) {
 761         display_using_handler(msgnum, "text/calendar",
 762                                 ICAL_VEVENT_COMPONENT,
 763                                 display_individual_cal);
 764 }
 765
 766 void display_task(long msgnum) {
 767         display_using_handler(msgnum, "text/calendar",
 768                                 ICAL_VTODO_COMPONENT,
 769                                 display_individual_task);
 770 }
 771
 772 void display_edit_task(void) {
 773         long msgnum = 0L;
 774
 775         /* Force change the room if we have to */
 776         if (strlen(bstr("taskrm")) > 0) {
 777                 gotoroom(bstr("taskrm"), 0);
 778         }
 779
 780         msgnum = atol(bstr("msgnum"));
 781         if (msgnum > 0L) {
 782                 /* existing task */
 783                 display_using_handler(msgnum, "text/calendar",
 784                                 ICAL_VTODO_COMPONENT,
 785                                 display_edit_individual_task);
 786         }
 787         else {
 788                 /* new task */
 789                 display_edit_individual_task(NULL, 0L);
 790         }
 791 }
 792
 793 void save_task(void) {
 794         long msgnum = 0L;
 795
 796         msgnum = atol(bstr("msgnum"));
 797         if (msgnum > 0L) {
 798                 display_using_handler(msgnum, "text/calendar",
 799                                 ICAL_VTODO_COMPONENT,
 800                                 save_individual_task);
 801         }
 802         else {
 803                 save_individual_task(NULL, 0L);
 804         }
 805 }
 806
 807 void display_edit_event(void) {
 808         long msgnum = 0L;
 809
 810         msgnum = atol(bstr("msgnum"));
 811         if (msgnum > 0L) {
 812                 /* existing event */
 813                 display_using_handler(msgnum, "text/calendar",
 814                                 ICAL_VEVENT_COMPONENT,
 815                                 display_edit_individual_event);
 816         }
 817         else {
 818                 /* new event */
 819                 display_edit_individual_event(NULL, 0L);
 820         }
 821 }
 822
 823 void save_event(void) {
 824         long msgnum = 0L;
 825
 826         msgnum = atol(bstr("msgnum"));
 827
 828         if (msgnum > 0L) {
 829                 display_using_handler(msgnum, "text/calendar",
 830                                 ICAL_VEVENT_COMPONENT,
 831                                 save_individual_event);
 832         }
 833         else {
 834                 save_individual_event(NULL, 0L);
 835         }
 836 }
 837
 838 #endif /* HAVE_ICAL_H */