webcit/calendar.c

   1 /*
   2  * $Id$
   3  *
   4  * Functions which handle calendar objects and their processing/display.
   5  */
   6
   7 #include "webcit.h"
   8 #include "webserver.h"
   9
  10
  11 /*
  12  * \brief Process a calendar object
  13  * ...at this point it's already been deserialized by cal_process_attachment()
  14  * \param cal the calendar object
  15  * \param recursion_level call stack depth ??????
  16  * \param msgnum number of the mesage in our db
  17  * \param cal_partnum of the calendar object ????
  18  */
  19 void cal_process_object(icalcomponent *cal,
  20                         int recursion_level,
  21                         long msgnum,
  22                         char *cal_partnum
  23 ) {
  24         icalcomponent *c;
  25         icalproperty *method = NULL;
  26         icalproperty_method the_method = ICAL_METHOD_NONE;
  27         icalproperty *p;
  28         struct icaltimetype t;
  29         time_t tt;
  30         char buf[256];
  31         char conflict_name[256];
  32         char conflict_message[256];
  33         int is_update = 0;
  34         char divname[32];
  35         static int divcount = 0;
  36
  37         sprintf(divname, "rsvp%04x", ++divcount);
  38
  39         /** Leading HTML for the display of this object */
  40         if (recursion_level == 0) {
  41                 wprintf("<div class=\"mimepart\">\n");
  42         }
  43
  44         /** Look for a method */
  45         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  46
  47         /** See what we need to do with this */
  48         if (method != NULL) {
  49                 the_method = icalproperty_get_method(method);
  50                 char *title;
  51
  52                 wprintf("<div id=\"%s_title\">", divname);
  53                 wprintf("<img src=\"static/calarea_48x.gif\">");
  54                 wprintf("<span>");
  55                 switch(the_method) {
  56                     case ICAL_METHOD_REQUEST:
  57                         title = _("Meeting invitation");
  58                         break;
  59                     case ICAL_METHOD_REPLY:
  60                         title = _("Attendee's reply to your invitation");
  61                         break;
  62                     case ICAL_METHOD_PUBLISH:
  63                         title = _("Published event");
  64                         break;
  65                     default:
  66                         title = _("This is an unknown type of calendar item.");
  67                         break;
  68                 }
  69                 wprintf("</span>");
  70
  71                 wprintf("&nbsp;&nbsp;%s",title);
  72                 wprintf("</div>");
  73         }
  74
  75         wprintf("<dl>");
  76         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
  77         if (p != NULL) {
  78                 wprintf("<dt>");
  79                 wprintf(_("Summary:"));
  80                 wprintf("</dt><dd>");
  81                 escputs((char *)icalproperty_get_comment(p));
  82                 wprintf("</dd>\n");
  83         }
  84
  85         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
  86         if (p != NULL) {
  87                 wprintf("<dt>");
  88                 wprintf(_("Location:"));
  89                 wprintf("</dt><dd>");
  90                 escputs((char *)icalproperty_get_comment(p));
  91                 wprintf("</dd>\n");
  92         }
  93
  94         /**
  95          * Only show start/end times if we're actually looking at the VEVENT
  96          * component.  Otherwise it shows bogus dates for things like timezone.
  97          */
  98         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
  99
 100                 p = icalcomponent_get_first_property(cal,
 101                                                 ICAL_DTSTART_PROPERTY);
 102                 if (p != NULL) {
 103                         t = icalproperty_get_dtstart(p);
 104
 105                         if (t.is_date) {
 106                                 struct tm d_tm;
 107                                 char d_str[32];
 108                                 memset(&d_tm, 0, sizeof d_tm);
 109                                 d_tm.tm_year = t.year - 1900;
 110                                 d_tm.tm_mon = t.month - 1;
 111                                 d_tm.tm_mday = t.day;
 112                                 wc_strftime(d_str, sizeof d_str, "%x", &d_tm);
 113                                 wprintf("<dt>");
 114                                 wprintf(_("Date:"));
 115                                 wprintf("</dt><dd>%s</dd>", d_str);
 116                         }
 117                         else {
 118                                 tt = icaltime_as_timet(t);
 119                                 webcit_fmt_date(buf, tt, 0);
 120                                 wprintf("<dt>");
 121                                 wprintf(_("Starting date/time:"));
 122                                 wprintf("</dt><dd>%s</dd>", buf);
 123                         }
 124                 }
 125
 126                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 127                 if (p != NULL) {
 128                         t = icalproperty_get_dtend(p);
 129                         tt = icaltime_as_timet(t);
 130                         webcit_fmt_date(buf, tt, 0);
 131                         wprintf("<dt>");
 132                         wprintf(_("Ending date/time:"));
 133                         wprintf("</dt><dd>%s</dd>", buf);
 134                 }
 135
 136         }
 137
 138         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 139         if (p != NULL) {
 140                 wprintf("<dt>");
 141                 wprintf(_("Description:"));
 142                 wprintf("</dt><dd>");
 143                 escputs((char *)icalproperty_get_comment(p));
 144                 wprintf("</dd>\n");
 145         }
 146
 147         /** If the component has attendees, iterate through them. */
 148         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 149                 wprintf("<dt>");
 150                 wprintf(_("Attendee:"));
 151                 wprintf("</dt><dd>");
 152                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
 153                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 154
 155                         /** screen name or email address */
 156                         strcpy(buf, &buf[7]);
 157                         striplt(buf);
 158                         escputs(buf);
 159                         wprintf(" ");
 160
 161                         /** participant status */
 162                         partstat_as_string(buf, p);
 163                         escputs(buf);
 164                 }
 165                 wprintf("</dd>\n");
 166         }
 167
 168         /** If the component has subcomponents, recurse through them. */
 169         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 170             (c != 0);
 171             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 172                 /* Recursively process subcomponent */
 173                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 174         }
 175
 176         /** If this is a REQUEST, display conflicts and buttons */
 177         if (the_method == ICAL_METHOD_REQUEST) {
 178
 179                 /* Check for conflicts */
 180                 lprintf(9, "Checking server calendar for conflicts...\n");
 181                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 182                 serv_getln(buf, sizeof buf);
 183                 if (buf[0] == '1') {
 184                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 185                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 186                                 is_update = extract_int(buf, 4);
 187
 188                                 if (is_update) {
 189                                         snprintf(conflict_message, sizeof conflict_message,
 190                                                 _("This is an update of '%s' which is already in your calendar."), conflict_name);
 191                                 }
 192                                 else {
 193                                         snprintf(conflict_message, sizeof conflict_message,
 194                                                 _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
 195                                 }
 196
 197                                 wprintf("<dt>%s",
 198                                         (is_update ?
 199                                                 _("Update:") :
 200                                                 _("CONFLICT:")
 201                                         )
 202                                 );
 203                                 wprintf("</dt><dd>");
 204                                 escputs(conflict_message);
 205                                 wprintf("</dd>\n");
 206                         }
 207                 }
 208                 lprintf(9, "...done.\n");
 209
 210                 wprintf("</dl>");
 211
 212                 /** Display the Accept/Decline buttons */
 213                 wprintf("<p id=\"%s_question\">"
 214                         "%s "
 215                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 216                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Accept');\">%s</a>"
 217                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 218                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Tentative');\">%s</a>"
 219                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 220                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Decline');\">%s</a>"
 221                         "</span></p>\n",
 222                         divname,
 223                         _("How would you like to respond to this invitation?"),
 224                         divname, divname, msgnum, cal_partnum, _("Accept"),
 225                         divname, divname, msgnum, cal_partnum, _("Tentative"),
 226                         divname, divname, msgnum, cal_partnum, _("Decline")
 227                 );
 228
 229         }
 230
 231         /** If this is a REPLY, display update button */
 232         if (the_method == ICAL_METHOD_REPLY) {
 233
 234                 /** \todo  In the future, if we want to validate this object before \
 235                  * continuing, we can do it this way:
 236                 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
 237                 serv_getln(buf, sizeof buf);
 238                 }
 239                  ***********/
 240
 241                 /** Display the update buttons */
 242                 wprintf("<p id=\"%s_question\" >"
 243                         "%s "
 244                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 245                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Update');\">%s</a>"
 246                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 247                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Ignore');\">%s</a>"
 248                         "</span></p>\n",
 249                         divname,
 250                         _("Click <i>Update</i> to accept this reply and update your calendar."),
 251                         divname, divname, msgnum, cal_partnum, _("Update"),
 252                         divname, divname, msgnum, cal_partnum, _("Ignore")
 253                 );
 254
 255         }
 256
 257         /** Trailing HTML for the display of this object */
 258         if (recursion_level == 0) {
 259                 wprintf("<p>&nbsp;</p></div>\n");
 260         }
 261 }
 262
 263
 264 /**
 265  * \brief process calendar mail atachment
 266  * Deserialize a calendar object in a message so it can be processed.
 267  * (This is the main entry point for these things)
 268  * \param part_source the part of the message we want to parse
 269  * \param msgnum number of the mesage in our db
 270  * \param cal_partnum the number of the calendar item
 271  */
 272 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 273         icalcomponent *cal;
 274
 275         cal = icalcomponent_new_from_string(part_source);
 276
 277         if (cal == NULL) {
 278                 wprintf(_("There was an error parsing this calendar item."));
 279                 wprintf("<br />\n");
 280                 return;
 281         }
 282
 283         ical_dezonify(cal);
 284         cal_process_object(cal, 0, msgnum, cal_partnum);
 285
 286         /* Free the memory we obtained from libical's constructor */
 287         icalcomponent_free(cal);
 288 }
 289
 290
 291
 292
 293 /**
 294  * \brief accept/decline meeting
 295  * Respond to a meeting request
 296  */
 297 void respond_to_request(void) {
 298         char buf[1024];
 299
 300         begin_ajax_response();
 301
 302         serv_printf("ICAL respond|%s|%s|%s|",
 303                 bstr("msgnum"),
 304                 bstr("cal_partnum"),
 305                 bstr("sc")
 306         );
 307         serv_getln(buf, sizeof buf);
 308
 309         if (buf[0] == '2') {
 310                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 311                 if (!strcasecmp(bstr("sc"), "accept")) {
 312                         wprintf(_("You have accepted this meeting invitation.  "
 313                                 "It has been entered into your calendar.")
 314                         );
 315                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 316                         wprintf(_("You have tentatively accepted this meeting invitation.  "
 317                                 "It has been 'pencilled in' to your calendar.")
 318                         );
 319                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 320                         wprintf(_("You have declined this meeting invitation.  "
 321                                 "It has <b>not</b> been entered into your calendar.")
 322                         );
 323                 }
 324                 wprintf(" ");
 325                 wprintf(_("A reply has been sent to the meeting organizer."));
 326                 wprintf("</span>");
 327         } else {
 328                 wprintf("<img align=\"center\" src=\"static/error.gif\"><span>");
 329                 wprintf("%s\n", &buf[4]);
 330                 wprintf("</span>");
 331         }
 332
 333         end_ajax_response();
 334 }
 335
 336
 337
 338 /**
 339  * \brief Handle an incoming RSVP
 340  */
 341 void handle_rsvp(void) {
 342         char buf[1024];
 343
 344         begin_ajax_response();
 345
 346         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 347                 bstr("msgnum"),
 348                 bstr("cal_partnum"),
 349                 bstr("sc")
 350         );
 351         serv_getln(buf, sizeof buf);
 352
 353         if (buf[0] == '2') {
 354                 wprintf("<img src=\"static/calarea_48x.gif\"><span>");
 355                 if (!strcasecmp(bstr("sc"), "update")) {
 356                         wprintf(_("Your calendar has been updated to reflect this RSVP."));
 357                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 358                         wprintf(_("You have chosen to ignore this RSVP. "
 359                                 "Your calendar has <b>not</b> been updated.")
 360                         );
 361                 }
 362                 wprintf("</span>");
 363         } else {
 364                 wprintf("<img src=\"static/error.gif\"><span> %s\n", &buf[4]);
 365                 wprintf("</span>");
 366         }
 367
 368         end_ajax_response();
 369
 370 }
 371
 372
 373
 374 /*@}*/
 375 /*-----------------------------------------------------------------------**/
 376
 377
 378
 379 /**
 380  * \defgroup MsgDisplayHandlers Display handlers for message reading
 381  * \ingroup Calendaring
 382  */
 383
 384 /*@{*/
 385
 386
 387
 388 /**
 389  * \brief get items, keep them.
 390  * If we're reading calendar items, just store them for now.  We have to
 391  * sort and re-output them later when we draw the calendar.
 392  * \param cal Our calendar to process
 393  * \param msgnum number of the mesage in our db
 394  */
 395 void display_individual_cal(icalcomponent *cal, long msgnum, char *from, int unread)
 396 {
 397         struct wcsession *WCC = WC;     /* stack this for faster access (WC is a function) */
 398
 399         WCC->num_cal += 1;
 400         WCC->disp_cal = realloc(WC->disp_cal, (sizeof(struct disp_cal) * WCC->num_cal) );
 401         WCC->disp_cal[WCC->num_cal - 1].cal = icalcomponent_new_clone(cal);
 402         WCC->disp_cal[WCC->num_cal - 1].unread = unread;
 403         WCC->disp_cal[WCC->num_cal - 1].from = malloc (strlen(from) + 1);
 404         strcpy (WCC->disp_cal[WCC->num_cal - 1].from, from);
 405         ical_dezonify(WCC->disp_cal[WCC->num_cal - 1].cal);
 406         WCC->disp_cal[WCC->num_cal - 1].cal_msgnum = msgnum;
 407 }
 408
 409
 410
 411 /*
 412  * \brief edit a task
 413  * Display a task by itself (for editing)
 414  * \param supplied_vtodo the todo item we want to edit
 415  * \param msgnum number of the mesage in our db
 416  */
 417 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum, char *from, int unread) {
 418         icalcomponent *vtodo;
 419         icalproperty *p;
 420         struct icaltimetype t;
 421         time_t now;
 422         int created_new_vtodo = 0;
 423
 424         now = time(NULL);
 425
 426         if (supplied_vtodo != NULL) {
 427                 vtodo = supplied_vtodo;
 428
 429                 /**
 430                  * If we're looking at a fully encapsulated VCALENDAR
 431                  * rather than a VTODO component, attempt to use the first
 432                  * relevant VTODO subcomponent.  If there is none, the
 433                  * NULL returned by icalcomponent_get_first_component() will
 434                  * tell the next iteration of this function to create a
 435                  * new one.
 436                  */
 437                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 438                         display_edit_individual_task(
 439                                 icalcomponent_get_first_component(
 440                                         vtodo, ICAL_VTODO_COMPONENT
 441                                         ),
 442                                 msgnum,
 443                                 from, unread
 444                         );
 445                         return;
 446                 }
 447         }
 448         else {
 449                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 450                 created_new_vtodo = 1;
 451         }
 452
 453         output_headers(1, 1, 2, 0, 0, 0);
 454         wprintf("<div id=\"banner\">\n");
 455         wprintf("<img src=\"static/taskmanag_48x.gif\">");
 456         wprintf("<h1>");
 457         wprintf(_("Edit task"));
 458         wprintf("</h1>");
 459         wprintf("</div>\n");
 460
 461         wprintf("<div id=\"content\" class=\"service\">\n");
 462
 463         wprintf("<div class=\"fix_scrollbar_bug\">"
 464                 "<table class=\"calendar_background\"><tr><td>");
 465
 466         wprintf("<FORM METHOD=\"POST\" action=\"save_task\">\n");
 467         wprintf("<input type=\"hidden\" name=\"nonce\" value=\"%ld\">\n", WC->nonce);
 468         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 469                 msgnum);
 470
 471         wprintf("<TABLE border=0>\n");
 472
 473         wprintf("<TR><TD>");
 474         wprintf(_("Summary:"));
 475         wprintf("</TD><TD>"
 476                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 477                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 478         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 479         if (p != NULL) {
 480                 escputs((char *)icalproperty_get_comment(p));
 481         }
 482         wprintf("\"></TD></TR>\n");
 483
 484         wprintf("<TR><TD>");
 485         wprintf(_("Start date:"));
 486         wprintf("</TD><TD>");
 487         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 488         if (p != NULL) {
 489                 t = icalproperty_get_dtstart(p);
 490         }
 491         else {
 492                 t = icaltime_from_timet(now, 0);
 493         }
 494         display_icaltimetype_as_webform(&t, "dtstart");
 495         wprintf("</TD></TR>\n");
 496
 497         wprintf("<TR><TD>");
 498         wprintf(_("Due date:"));
 499         wprintf("</TD><TD>");
 500         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 501         if (p != NULL) {
 502                 t = icalproperty_get_due(p);
 503         }
 504         else {
 505                 t = icaltime_from_timet(now, 0);
 506         }
 507         display_icaltimetype_as_webform(&t, "due");
 508         wprintf("</TD></TR>\n");
 509         wprintf("<TR><TD>");
 510         wprintf(_("Description:"));
 511         wprintf("</TD><TD>");
 512         wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
 513                 "ROWS=10 COLS=80 WIDTH=80>\n"
 514         );
 515         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 516         if (p != NULL) {
 517                 escputs((char *)icalproperty_get_comment(p));
 518         }
 519         wprintf("</TEXTAREA></TD></TR></TABLE>\n");
 520
 521         wprintf("<CENTER>"
 522                 "<INPUT TYPE=\"submit\" NAME=\"save_button\" VALUE=\"%s\">"
 523                 "&nbsp;&nbsp;"
 524                 "<INPUT TYPE=\"submit\" NAME=\"delete_button\" VALUE=\"%s\">\n"
 525                 "&nbsp;&nbsp;"
 526                 "<INPUT TYPE=\"submit\" NAME=\"cancel_button\" VALUE=\"%s\">\n"
 527                 "</CENTER>\n",
 528                 _("Save"),
 529                 _("Delete"),
 530                 _("Cancel")
 531         );
 532
 533         wprintf("</FORM>\n");
 534
 535         wprintf("</td></tr></table></div>\n");
 536         wDumpContent(1);
 537
 538         if (created_new_vtodo) {
 539                 icalcomponent_free(vtodo);
 540         }
 541 }
 542
 543 /*
 544  * \brief Save an edited task
 545  * \param supplied_vtodo the task to save
 546  * \param msgnum number of the mesage in our db
 547  */
 548 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum, char* from, int unread) {
 549         char buf[SIZ];
 550         int delete_existing = 0;
 551         icalproperty *prop;
 552         icalcomponent *vtodo, *encaps;
 553         int created_new_vtodo = 0;
 554         int i;
 555         int sequence = 0;
 556         struct icaltimetype t;
 557
 558         if (supplied_vtodo != NULL) {
 559                 vtodo = supplied_vtodo;
 560                 /**
 561                  * If we're looking at a fully encapsulated VCALENDAR
 562                  * rather than a VTODO component, attempt to use the first
 563                  * relevant VTODO subcomponent.  If there is none, the
 564                  * NULL returned by icalcomponent_get_first_component() will
 565                  * tell the next iteration of this function to create a
 566                  * new one.
 567                  */
 568                 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
 569                         save_individual_task(
 570                                 icalcomponent_get_first_component(
 571                                         vtodo, ICAL_VTODO_COMPONENT),
 572                                 msgnum, from, unread
 573                         );
 574                         return;
 575                 }
 576         }
 577         else {
 578                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 579                 created_new_vtodo = 1;
 580         }
 581
 582         if (!IsEmptyStr(bstr("save_button"))) {
 583
 584                 /** Replace values in the component with ones from the form */
 585
 586                 while (prop = icalcomponent_get_first_property(vtodo,
 587                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 588                         icalcomponent_remove_property(vtodo, prop);
 589                         icalproperty_free(prop);
 590                 }
 591                 if (!IsEmptyStr(bstr("summary"))) {
 592
 593                         icalcomponent_add_property(vtodo,
 594                                         icalproperty_new_summary(bstr("summary")));
 595                 } else {
 596                         icalcomponent_add_property(vtodo,
 597                                         icalproperty_new_summary("Untitled Task"));
 598                 }
 599
 600                 while (prop = icalcomponent_get_first_property(vtodo,
 601                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 602                         icalcomponent_remove_property(vtodo, prop);
 603                         icalproperty_free(prop);
 604                 }
 605                 icalcomponent_add_property(vtodo,
 606                         icalproperty_new_description(bstr("description")));
 607
 608                 while (prop = icalcomponent_get_first_property(vtodo,
 609                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 610                         icalcomponent_remove_property(vtodo, prop);
 611                         icalproperty_free(prop);
 612                 }
 613                 icaltime_from_webform(&t, "dtstart");
 614                 icalcomponent_add_property(vtodo,
 615                         icalproperty_new_dtstart(t)
 616                 );
 617
 618                 while (prop = icalcomponent_get_first_property(vtodo,
 619                       ICAL_DUE_PROPERTY), prop != NULL) {
 620                         icalcomponent_remove_property(vtodo, prop);
 621                         icalproperty_free(prop);
 622                 }
 623                 icaltime_from_webform(&t, "due");
 624                 icalcomponent_add_property(vtodo,
 625                         icalproperty_new_due(t)
 626                 );
 627
 628                 /** Give this task a UID if it doesn't have one. */
 629                 lprintf(9, "Give this task a UID if it doesn't have one.\n");
 630                 if (icalcomponent_get_first_property(vtodo,
 631                    ICAL_UID_PROPERTY) == NULL) {
 632                         generate_uuid(buf);
 633                         icalcomponent_add_property(vtodo,
 634                                 icalproperty_new_uid(buf)
 635                         );
 636                 }
 637
 638                 /** Increment the sequence ID */
 639                 lprintf(9, "Increment the sequence ID\n");
 640                 while (prop = icalcomponent_get_first_property(vtodo,
 641                       ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
 642                         i = icalproperty_get_sequence(prop);
 643                         lprintf(9, "Sequence was %d\n", i);
 644                         if (i > sequence) sequence = i;
 645                         icalcomponent_remove_property(vtodo, prop);
 646                         icalproperty_free(prop);
 647                 }
 648                 ++sequence;
 649                 lprintf(9, "New sequence is %d.  Adding...\n", sequence);
 650                 icalcomponent_add_property(vtodo,
 651                         icalproperty_new_sequence(sequence)
 652                 );
 653
 654                 /**
 655                  * Encapsulate event into full VCALENDAR component.  Clone it first,
 656                  * for two reasons: one, it's easier to just free the whole thing
 657                  * when we're done instead of unbundling, but more importantly, we
 658                  * can't encapsulate something that may already be encapsulated
 659                  * somewhere else.
 660                  */
 661                 lprintf(9, "Encapsulating into a full VCALENDAR component\n");
 662                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(vtodo));
 663
 664                 /* Serialize it and save it to the message base */
 665                 serv_puts("ENT0 1|||4");
 666                 serv_getln(buf, sizeof buf);
 667                 if (buf[0] == '4') {
 668                         serv_puts("Content-type: text/calendar");
 669                         serv_puts("");
 670                         serv_puts(icalcomponent_as_ical_string(encaps));
 671                         serv_puts("000");
 672
 673                         /**
 674                          * Probably not necessary; the server will see the UID
 675                          * of the object and delete the old one anyway, but
 676                          * just in case...
 677                          */
 678                         delete_existing = 1;
 679                 }
 680                 icalcomponent_free(encaps);
 681         }
 682
 683         /**
 684          * If the user clicked 'Delete' then explicitly delete the message.
 685          */
 686         if (!IsEmptyStr(bstr("delete_button"))) {
 687                 delete_existing = 1;
 688         }
 689
 690         if ( (delete_existing) && (msgnum > 0L) ) {
 691                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 692                 serv_getln(buf, sizeof buf);
 693         }
 694
 695         if (created_new_vtodo) {
 696                 icalcomponent_free(vtodo);
 697         }
 698
 699         /** Go back to the task list */
 700         readloop("readfwd");
 701 }
 702
 703
 704
 705 /**
 706  * \brief generic item handler
 707  * Code common to all display handlers.  Given a message number and a MIME
 708  * type, we load the message and hunt for that MIME type.  If found, we load
 709  * the relevant part, deserialize it into a libical component, filter it for
 710  * the requested object type, and feed it to the specified handler.
 711  * \param mimetype mimetyp of our object
 712  * \param which_kind sort of ical type
 713  * \param msgnum number of the mesage in our db
 714  * \param callback a funcion \todo
 715  *
 716  */
 717 void display_using_handler(long msgnum, int unread,
 718                            icalcomponent_kind which_kind,
 719                            void (*callback)(icalcomponent *, long, char*, int)
 720         ) {
 721         char buf[1024];
 722         char from[128] = "";
 723         char mime_partnum[256];
 724         char mime_filename[256];
 725         char mime_content_type[256];
 726         char mime_disposition[256];
 727         int mime_length;
 728         char relevant_partnum[256];
 729         char *relevant_source = NULL;
 730         icalcomponent *cal, *c;
 731
 732         relevant_partnum[0] = '\0';
 733         sprintf(buf, "MSG4 %ld", msgnum);       /* we need the mime headers */
 734         serv_puts(buf);
 735         serv_getln(buf, sizeof buf);
 736         if (buf[0] != '1') return;
 737
 738         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 739                 if (!strncasecmp(buf, "part=", 5)) {
 740                         extract_token(mime_filename, &buf[5], 1, '|', sizeof mime_filename);
 741                         extract_token(mime_partnum, &buf[5], 2, '|', sizeof mime_partnum);
 742                         extract_token(mime_disposition, &buf[5], 3, '|', sizeof mime_disposition);
 743                         extract_token(mime_content_type, &buf[5], 4, '|', sizeof mime_content_type);
 744                         mime_length = extract_int(&buf[5], 5);
 745
 746                         if (  (!strcasecmp(mime_content_type, "text/calendar"))
 747                            || (!strcasecmp(mime_content_type, "application/ics"))
 748                            || (!strcasecmp(mime_content_type, "text/vtodo"))
 749                         ) {
 750                                 strcpy(relevant_partnum, mime_partnum);
 751                         }
 752                 }
 753                 else if (!strncasecmp(buf, "from=", 4)) {
 754                         extract_token(from, buf, 1, '=', sizeof(from));
 755                 }
 756         }
 757
 758         if (!IsEmptyStr(relevant_partnum)) {
 759                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 760                 if (relevant_source != NULL) {
 761
 762                         cal = icalcomponent_new_from_string(relevant_source);
 763                         if (cal != NULL) {
 764
 765                                 ical_dezonify(cal);
 766
 767                                 /** Simple components of desired type */
 768                                 if (icalcomponent_isa(cal) == which_kind) {
 769                                         callback(cal, msgnum, from, unread);
 770                                 }
 771
 772                                 /** Subcomponents of desired type */
 773                                 for (c = icalcomponent_get_first_component(cal,
 774                                     which_kind);
 775                                     (c != 0);
 776                                     c = icalcomponent_get_next_component(cal,
 777                                     which_kind)) {
 778                                         callback(c, msgnum, from, unread);
 779                                 }
 780                                 icalcomponent_free(cal);
 781                         }
 782                         free(relevant_source);
 783                 }
 784         }
 785         icalmemory_free_ring();
 786 }
 787
 788 /**
 789  * \brief display whole calendar
 790  * \param msgnum number of the mesage in our db
 791  */
 792 void display_calendar(long msgnum, int unread) {
 793         display_using_handler(msgnum, unread,
 794                                 ICAL_VEVENT_COMPONENT,
 795                                 display_individual_cal);
 796 }
 797
 798 /**
 799  * \brief display whole taksview
 800  * \param msgnum number of the mesage in our db
 801  */
 802 void display_task(long msgnum, int unread) {
 803         display_using_handler(msgnum, unread,
 804                                 ICAL_VTODO_COMPONENT,
 805                                 display_individual_cal);
 806 }
 807
 808 /**
 809  * \brief display the editor component for a task
 810  */
 811 void display_edit_task(void) {
 812         long msgnum = 0L;
 813
 814         /** Force change the room if we have to */
 815         if (!IsEmptyStr(bstr("taskrm"))) {
 816                 gotoroom(bstr("taskrm"));
 817         }
 818
 819         msgnum = atol(bstr("msgnum"));
 820         if (msgnum > 0L) {
 821                 /** existing task */
 822                 display_using_handler(msgnum, 0,
 823                                 ICAL_VTODO_COMPONENT,
 824                                 display_edit_individual_task);
 825         }
 826         else {
 827                 /** new task */
 828                 display_edit_individual_task(NULL, 0L, "", 0);
 829         }
 830 }
 831
 832 /**
 833  *\brief save an edited task
 834  */
 835 void save_task(void) {
 836         long msgnum = 0L;
 837
 838         msgnum = atol(bstr("msgnum"));
 839         if (msgnum > 0L) {
 840                 display_using_handler(msgnum, 0,
 841                                 ICAL_VTODO_COMPONENT,
 842                                 save_individual_task);
 843         }
 844         else {
 845                 save_individual_task(NULL, 0L, "", 0);
 846         }
 847 }
 848
 849 /**
 850  * \brief display the editor component for an event
 851  */
 852 void display_edit_event(void) {
 853         long msgnum = 0L;
 854
 855         msgnum = atol(bstr("msgnum"));
 856         if (msgnum > 0L) {
 857                 /* existing event */
 858                 display_using_handler(msgnum, 0,
 859                                 ICAL_VEVENT_COMPONENT,
 860                                 display_edit_individual_event);
 861         }
 862         else {
 863                 /* new event */
 864                 display_edit_individual_event(NULL, 0L, "", 0);
 865         }
 866 }
 867
 868 /**
 869  * \brief save an edited event
 870  */
 871 void save_event(void) {
 872         long msgnum = 0L;
 873
 874         msgnum = atol(bstr("msgnum"));
 875
 876         if (msgnum > 0L) {
 877                 display_using_handler(msgnum, 0,
 878                                 ICAL_VEVENT_COMPONENT,
 879                                 save_individual_event);
 880         }
 881         else {
 882                 save_individual_event(NULL, 0L, "", 0);
 883         }
 884 }
 885
 886
 887
 888
 889
 890 /**
 891  * \brief freebusy display (for client software)
 892  * \param req dunno. ?????
 893  */
 894 void do_freebusy(char *req) {
 895         char who[SIZ];
 896         char buf[SIZ];
 897         char *fb;
 898         int len;
 899
 900         extract_token(who, req, 1, ' ', sizeof who);
 901         if (!strncasecmp(who, "/freebusy/", 10)) {
 902                 strcpy(who, &who[10]);
 903         }
 904         unescape_input(who);
 905
 906         len = strlen(who);
 907         if ( (!strcasecmp(&who[len-4], ".vcf"))
 908            || (!strcasecmp(&who[len-4], ".ifb"))
 909            || (!strcasecmp(&who[len-4], ".vfb")) ) {
 910                 who[len-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/1.1 404 %s\n", &buf[4]);
 919                 output_headers(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