webcit/calendar.c

   1 /*
   2  * $Id$
   3  *
   4  * Functions which handle calendar objects and their processing/display.
   5  *
   6  * Copyright (c) 1996-2010 by the citadel.org team
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "webcit.h"
  24 #include "webserver.h"
  25 #include "calendar.h"
  26
  27 /*
  28  * Process a calendar object.  At this point it's already been deserialized by cal_process_attachment()
  29  *
  30  * cal:                 the calendar object
  31  * recursion_level:     Number of times we've recursed into this function
  32  * msgnum:              Message number on the Citadel server
  33  * cal_partnum:         MIME part number within that message containing the calendar object
  34  */
  35 void cal_process_object(StrBuf *Target,
  36                         icalcomponent *cal,
  37                         int recursion_level,
  38                         long msgnum,
  39                         const char *cal_partnum)
  40 {
  41         icalcomponent *c;
  42         icalproperty *method = NULL;
  43         icalproperty_method the_method = ICAL_METHOD_NONE;
  44         icalproperty *p;
  45         struct icaltimetype t;
  46         time_t tt;
  47         char buf[256];
  48         char conflict_name[256];
  49         char conflict_message[256];
  50         int is_update = 0;
  51         char divname[32];
  52         static int divcount = 0;
  53
  54         sprintf(divname, "rsvp%04x", ++divcount);
  55
  56         /* Convert timezones to something easy to display.
  57          * It's safe to do this in memory because we're only changing it on the
  58          * display side -- when we tell the server to do something with the object,
  59          * the server will be working with its original copy in the database.
  60          */
  61         if ((cal) && (recursion_level == 0)) {
  62                 ical_dezonify(cal);
  63         }
  64
  65         /* Leading HTML for the display of this object */
  66         if (recursion_level == 0) {
  67                 StrBufAppendPrintf(Target, "<div class=\"mimepart\">\n");
  68         }
  69
  70         /* Look for a method */
  71         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  72
  73         /* See what we need to do with this */
  74         if (method != NULL) {
  75                 char *title;
  76                 the_method = icalproperty_get_method(method);
  77
  78                 StrBufAppendPrintf(Target, "<div id=\"%s_title\">", divname);
  79                 StrBufAppendPrintf(Target, "<img src=\"static/calarea_48x.gif\">");
  80                 StrBufAppendPrintf(Target, "<span>");
  81                 switch(the_method) {
  82                 case ICAL_METHOD_REQUEST:
  83                         title = _("Meeting invitation");
  84                         break;
  85                 case ICAL_METHOD_REPLY:
  86                         title = _("Attendee's reply to your invitation");
  87                         break;
  88                 case ICAL_METHOD_PUBLISH:
  89                         title = _("Published event");
  90                         break;
  91                 default:
  92                         title = _("This is an unknown type of calendar item.");
  93                         break;
  94                 }
  95                 StrBufAppendPrintf(Target, "</span>");
  96
  97                 StrBufAppendPrintf(Target, "&nbsp;&nbsp;%s",title);
  98                 StrBufAppendPrintf(Target, "</div>");
  99         }
 100
 101         StrBufAppendPrintf(Target, "<dl>");
 102         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 103         if (p != NULL) {
 104                 StrBufAppendPrintf(Target, "<dt>");
 105                 StrBufAppendPrintf(Target, _("Summary:"));
 106                 StrBufAppendPrintf(Target, "</dt><dd>");
 107                 StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
 108                 StrBufAppendPrintf(Target, "</dd>\n");
 109         }
 110
 111         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 112         if (p != NULL) {
 113                 StrBufAppendPrintf(Target, "<dt>");
 114                 StrBufAppendPrintf(Target, _("Location:"));
 115                 StrBufAppendPrintf(Target, "</dt><dd>");
 116                 StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
 117                 StrBufAppendPrintf(Target, "</dd>\n");
 118         }
 119
 120         /*
 121          * Only show start/end times if we're actually looking at the VEVENT
 122          * component.  Otherwise it shows bogus dates for things like timezone.
 123          */
 124         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 125
 126                 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
 127                 if (p != NULL) {
 128                         t = icalproperty_get_dtstart(p);
 129
 130                         if (t.is_date) {
 131                                 struct tm d_tm;
 132                                 char d_str[32];
 133                                 memset(&d_tm, 0, sizeof d_tm);
 134                                 d_tm.tm_year = t.year - 1900;
 135                                 d_tm.tm_mon = t.month - 1;
 136                                 d_tm.tm_mday = t.day;
 137                                 wc_strftime(d_str, sizeof d_str, "%x", &d_tm);
 138                                 StrBufAppendPrintf(Target, "<dt>");
 139                                 StrBufAppendPrintf(Target, _("Date:"));
 140                                 StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", d_str);
 141                         }
 142                         else {
 143                                 tt = icaltime_as_timet(t);
 144                                 webcit_fmt_date(buf, 256, tt, DATEFMT_FULL);
 145                                 StrBufAppendPrintf(Target, "<dt>");
 146                                 StrBufAppendPrintf(Target, _("Starting date/time:"));
 147                                 StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", buf);
 148                         }
 149                 }
 150
 151                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 152                 if (p != NULL) {
 153                         t = icalproperty_get_dtend(p);
 154                         tt = icaltime_as_timet(t);
 155                         webcit_fmt_date(buf, 256, tt, DATEFMT_FULL);
 156                         StrBufAppendPrintf(Target, "<dt>");
 157                         StrBufAppendPrintf(Target, _("Ending date/time:"));
 158                         StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", buf);
 159                 }
 160
 161         }
 162
 163         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 164         if (p != NULL) {
 165                 StrBufAppendPrintf(Target, "<dt>");
 166                 StrBufAppendPrintf(Target, _("Description:"));
 167                 StrBufAppendPrintf(Target, "</dt><dd>");
 168                 StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
 169                 StrBufAppendPrintf(Target, "</dd>\n");
 170         }
 171
 172         if (icalcomponent_get_first_property(cal, ICAL_RRULE_PROPERTY)) {
 173                 /* Unusual string syntax used here in order to re-use existing translations */
 174                 StrBufAppendPrintf(Target, "<dt>%s:</dt><dd>%s.</dd>\n",
 175                         _("Recurrence"),
 176                         _("This is a recurring event")
 177                 );
 178         }
 179
 180         /* If the component has attendees, iterate through them. */
 181         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY);
 182              (p != NULL);
 183              p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
 184                 StrBufAppendPrintf(Target, "<dt>");
 185                 StrBufAppendPrintf(Target, _("Attendee:"));
 186                 StrBufAppendPrintf(Target, "</dt><dd>");
 187                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
 188                 if (!strncasecmp(buf, "MAILTO:", 7)) {
 189
 190                         /** screen name or email address */
 191                         strcpy(buf, &buf[7]);
 192                         striplt(buf);
 193                         StrEscAppend(Target, NULL, buf, 0, 0);
 194                         StrBufAppendPrintf(Target, " ");
 195
 196                         /** participant status */
 197                         partstat_as_string(buf, p);
 198                         StrEscAppend(Target, NULL, buf, 0, 0);
 199                 }
 200                 StrBufAppendPrintf(Target, "</dd>\n");
 201         }
 202
 203         /* If the component has subcomponents, recurse through them. */
 204         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 205              (c != 0);
 206              c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 207                 /* Recursively process subcomponent */
 208                 cal_process_object(Target, c, recursion_level+1, msgnum, cal_partnum);
 209         }
 210
 211         /* If this is a REQUEST, display conflicts and buttons */
 212         if (the_method == ICAL_METHOD_REQUEST) {
 213
 214                 /* Check for conflicts */
 215                 lprintf(9, "Checking server calendar for conflicts...\n");
 216                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 217                 serv_getln(buf, sizeof buf);
 218                 if (buf[0] == '1') {
 219                         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 220                                 extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
 221                                 is_update = extract_int(buf, 4);
 222
 223                                 if (is_update) {
 224                                         snprintf(conflict_message, sizeof conflict_message,
 225                                                  _("This is an update of '%s' which is already in your calendar."), conflict_name);
 226                                 }
 227                                 else {
 228                                         snprintf(conflict_message, sizeof conflict_message,
 229                                                  _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
 230                                 }
 231
 232                                 StrBufAppendPrintf(Target, "<dt>%s",
 233                                         (is_update ?
 234                                          _("Update:") :
 235                                          _("CONFLICT:")
 236                                                 )
 237                                         );
 238                                 StrBufAppendPrintf(Target, "</dt><dd>");
 239                                 StrEscAppend(Target, NULL, conflict_message, 0, 0);
 240                                 StrBufAppendPrintf(Target, "</dd>\n");
 241                         }
 242                 }
 243                 lprintf(9, "...done.\n");
 244
 245                 StrBufAppendPrintf(Target, "</dl>");
 246
 247                 /* Display the Accept/Decline buttons */
 248                 StrBufAppendPrintf(Target, "<p id=\"%s_question\">"
 249                         "%s "
 250                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 251                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Accept');\">%s</a>"
 252                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 253                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Tentative');\">%s</a>"
 254                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 255                         "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Decline');\">%s</a>"
 256                         "</span></p>\n",
 257                         divname,
 258                         _("How would you like to respond to this invitation?"),
 259                         divname, divname, msgnum, cal_partnum, _("Accept"),
 260                         divname, divname, msgnum, cal_partnum, _("Tentative"),
 261                         divname, divname, msgnum, cal_partnum, _("Decline")
 262                         );
 263
 264         }
 265
 266         /* If this is a REPLY, display update button */
 267         if (the_method == ICAL_METHOD_REPLY) {
 268
 269                 /* Display the update buttons */
 270                 StrBufAppendPrintf(Target, "<p id=\"%s_question\" >"
 271                         "%s "
 272                         "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
 273                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Update');\">%s</a>"
 274                         "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
 275                         "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Ignore');\">%s</a>"
 276                         "</span></p>\n",
 277                         divname,
 278                         _("Click <i>Update</i> to accept this reply and update your calendar."),
 279                         divname, divname, msgnum, cal_partnum, _("Update"),
 280                         divname, divname, msgnum, cal_partnum, _("Ignore")
 281                         );
 282
 283         }
 284
 285         /* Trailing HTML for the display of this object */
 286         if (recursion_level == 0) {
 287                 StrBufAppendPrintf(Target, "<p>&nbsp;</p></div>\n");
 288         }
 289 }
 290
 291
 292 /*
 293  * Deserialize a calendar object in a message so it can be displayed.
 294  */
 295 void cal_process_attachment(wc_mime_attachment *Mime)
 296 {
 297         icalcomponent *cal;
 298
 299         cal = icalcomponent_new_from_string(ChrPtr(Mime->Data));
 300         FlushStrBuf(Mime->Data);
 301         if (cal == NULL) {
 302                 StrBufAppendPrintf(Mime->Data, _("There was an error parsing this calendar item."));
 303                 StrBufAppendPrintf(Mime->Data, "<br />\n");
 304                 return;
 305         }
 306
 307         cal_process_object(Mime->Data, cal, 0, Mime->msgnum, ChrPtr(Mime->PartNum));
 308
 309         /* Free the memory we obtained from libical's constructor */
 310         icalcomponent_free(cal);
 311 }
 312
 313
 314
 315
 316 /*
 317  * Respond to a meeting request - accept/decline meeting
 318  */
 319 void respond_to_request(void)
 320 {
 321         char buf[1024];
 322
 323         begin_ajax_response();
 324
 325         serv_printf("ICAL respond|%s|%s|%s|",
 326                 bstr("msgnum"),
 327                 bstr("cal_partnum"),
 328                 bstr("sc")
 329         );
 330         serv_getln(buf, sizeof buf);
 331
 332         if (buf[0] == '2') {
 333                 wc_printf("<img src=\"static/calarea_48x.gif\"><span>");
 334                 if (!strcasecmp(bstr("sc"), "accept")) {
 335                         wc_printf(_("You have accepted this meeting invitation.  "
 336                                 "It has been entered into your calendar.")
 337                         );
 338                 } else if (!strcasecmp(bstr("sc"), "tentative")) {
 339                         wc_printf(_("You have tentatively accepted this meeting invitation.  "
 340                                 "It has been 'pencilled in' to your calendar.")
 341                         );
 342                 } else if (!strcasecmp(bstr("sc"), "decline")) {
 343                         wc_printf(_("You have declined this meeting invitation.  "
 344                                   "It has <b>not</b> been entered into your calendar.")
 345                                 );
 346                 }
 347                 wc_printf(" ");
 348                 wc_printf(_("A reply has been sent to the meeting organizer."));
 349                 wc_printf("</span>");
 350         } else {
 351                 wc_printf("<img align=\"center\" src=\"static/error.gif\"><span>");
 352                 wc_printf("%s\n", &buf[4]);
 353                 wc_printf("</span>");
 354         }
 355
 356         end_ajax_response();
 357 }
 358
 359
 360
 361 /*
 362  * Handle an incoming RSVP
 363  */
 364 void handle_rsvp(void)
 365 {
 366         char buf[1024];
 367
 368         begin_ajax_response();
 369
 370         serv_printf("ICAL handle_rsvp|%s|%s|%s|",
 371                 bstr("msgnum"),
 372                 bstr("cal_partnum"),
 373                 bstr("sc")
 374         );
 375         serv_getln(buf, sizeof buf);
 376
 377         if (buf[0] == '2') {
 378                 wc_printf("<img src=\"static/calarea_48x.gif\"><span>");
 379                 if (!strcasecmp(bstr("sc"), "update")) {
 380                         wc_printf(_("Your calendar has been updated to reflect this RSVP."));
 381                 } else if (!strcasecmp(bstr("sc"), "ignore")) {
 382                         wc_printf(_("You have chosen to ignore this RSVP. "
 383                                   "Your calendar has <b>not</b> been updated.")
 384                                 );
 385                 }
 386                 wc_printf("</span>");
 387         } else {
 388                 wc_printf("<img src=\"static/error.gif\"><span> %s\n", &buf[4]);
 389                 wc_printf("</span>");
 390         }
 391
 392         end_ajax_response();
 393 }
 394
 395
 396
 397
 398 /*
 399  * free memory allocated using libical
 400  */
 401 void delete_cal(void *vCal)
 402 {
 403         disp_cal *Cal = (disp_cal*) vCal;
 404         icalcomponent_free(Cal->cal);
 405         free(Cal->from);
 406         free(Cal);
 407 }
 408
 409 /*
 410  * This is the meat-and-bones of the first part of our two-phase calendar display.
 411  * As we encounter calendar items in messages being read from the server, we break out
 412  * any iCalendar objects and store them in a hash table.  Later on, the second phase will
 413  * use this hash table to render the calendar for display.
 414  */
 415 void display_individual_cal(icalcomponent *cal, long msgnum, char *from, int unread, calview *calv)
 416 {
 417         icalproperty *ps = NULL;
 418         struct icaltimetype dtstart, dtend;
 419         struct icaldurationtype dur;
 420         wcsession *WCC = WC;
 421         disp_cal *Cal;
 422         size_t len;
 423         time_t final_recurrence = 0;
 424         icalcomponent *cptr = NULL;
 425
 426         /* recur variables */
 427         icalproperty *rrule = NULL;
 428         struct icalrecurrencetype recur;
 429         icalrecur_iterator *ritr = NULL;
 430         struct icaltimetype next;
 431         int num_recur = 0;
 432         int stop_rr = 0;
 433
 434         dtstart = icaltime_null_time();
 435         dtend = icaltime_null_time();
 436
 437         if (WCC->disp_cal_items == NULL)
 438                 WCC->disp_cal_items = NewHash(0, Flathash);
 439
 440         /* Note: anything we do here, we also have to do below for the recurrences. */
 441         Cal = (disp_cal*) malloc(sizeof(disp_cal));
 442         memset(Cal, 0, sizeof(disp_cal));
 443         Cal->cal = icalcomponent_new_clone(cal);
 444
 445         /* Dezonify and decapsulate at the very last moment */
 446         /* lprintf(9, "INITIAL: %s\n", icaltime_as_ical_string(icalproperty_get_dtstart(
 447                 icalcomponent_get_first_property(icalcomponent_get_first_component(
 448                 Cal->cal, ICAL_VEVENT_COMPONENT), ICAL_DTSTART_PROPERTY)))
 449         ); */
 450         ical_dezonify(Cal->cal);
 451         if (icalcomponent_isa(Cal->cal) != ICAL_VEVENT_COMPONENT) {
 452                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 453                 if (cptr) {
 454                         cptr = icalcomponent_new_clone(cptr);
 455                         icalcomponent_free(Cal->cal);
 456                         Cal->cal = cptr;
 457                 }
 458         }
 459
 460         Cal->unread = unread;
 461         len = strlen(from);
 462         Cal->from = (char*)malloc(len+ 1);
 463         memcpy(Cal->from, from, len + 1);
 464         Cal->cal_msgnum = msgnum;
 465
 466         /* Precalculate the starting date and time of this event, and store it in our top-level
 467          * structure.  Later, when we are rendering the calendar, we can just peek at these values
 468          * without having to break apart every calendar item.
 469          */
 470         ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTSTART_PROPERTY);
 471         if (ps != NULL) {
 472                 dtstart = icalproperty_get_dtstart(ps);
 473                 Cal->event_start = icaltime_as_timet(dtstart);
 474         }
 475
 476         /* Do the same for the ending date and time.  It makes the day view much easier to render. */
 477         ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTEND_PROPERTY);
 478         if (ps != NULL) {
 479                 dtend = icalproperty_get_dtend(ps);
 480                 Cal->event_end = icaltime_as_timet(dtend);
 481         }
 482
 483         /* Store it in the hash list. */
 484         Put(WCC->disp_cal_items,
 485             (char*) &Cal->event_start,
 486             sizeof(Cal->event_start),
 487             Cal,
 488             delete_cal);
 489
 490         /****************************** handle recurring events ******************************/
 491
 492         if (icaltime_is_null_time(dtstart)) return;     /* Can't recur without a start time */
 493
 494         if (!icaltime_is_null_time(dtend)) {            /* Need duration for recurrences */
 495                 dur = icaltime_subtract(dtend, dtstart);
 496         }
 497
 498         /*
 499          * Just let libical iterate the recurrence, and keep looping back to the top of this function,
 500          * adding new hash entries that all point back to the same msgnum, until either the iteration
 501          * stops or some outer bound is reached.  The display code will automatically do the Right Thing.
 502          */
 503         cptr = cal;
 504         if (icalcomponent_isa(cptr) != ICAL_VEVENT_COMPONENT) {
 505                 cptr = icalcomponent_get_first_component(cptr, ICAL_VEVENT_COMPONENT);
 506         }
 507         if (!cptr) return;
 508         ps = icalcomponent_get_first_property(cptr, ICAL_DTSTART_PROPERTY);
 509         if (ps == NULL) return;
 510         dtstart = icalproperty_get_dtstart(ps);
 511         rrule = icalcomponent_get_first_property(cptr, ICAL_RRULE_PROPERTY);
 512         if (!rrule) return;
 513         recur = icalproperty_get_rrule(rrule);
 514         ritr = icalrecur_iterator_new(recur, dtstart);
 515         if (!ritr) return;
 516
 517         while (next = icalrecur_iterator_next(ritr), ((!icaltime_is_null_time(next))&&(!stop_rr)) ) {
 518                 ++num_recur;
 519                 if (num_recur > 1) {            /* Skip the first one.  We already did it at the root. */
 520                         icalcomponent *cptr;
 521                         /* lprintf(9, "REPEATS: %s\n", icaltime_as_ical_string(next)); */
 522
 523                         /* Note: anything we do here, we also have to do above for the root event. */
 524                         Cal = (disp_cal*) malloc(sizeof(disp_cal));
 525                         memset(Cal, 0, sizeof(disp_cal));
 526                         Cal->cal = icalcomponent_new_clone(cal);
 527                         Cal->unread = unread;
 528                         len = strlen(from);
 529                         Cal->from = (char*)malloc(len+ 1);
 530                         memcpy(Cal->from, from, len + 1);
 531                         Cal->cal_msgnum = msgnum;
 532
 533                         if (icalcomponent_isa(Cal->cal) == ICAL_VEVENT_COMPONENT) {
 534                                 cptr = Cal->cal;
 535                         }
 536                         else {
 537                                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 538                         }
 539                         if (cptr) {
 540                                 ps = icalcomponent_get_first_property(cptr, ICAL_DTSTART_PROPERTY);
 541                                 if (ps != NULL) {
 542                                         icalcomponent_remove_property(cptr, ps);
 543                                         ps = icalproperty_new_dtstart(next);
 544                                         icalcomponent_add_property(cptr, ps);
 545
 546                                         Cal->event_start = icaltime_as_timet(next);
 547                                         final_recurrence = Cal->event_start;
 548                                 }
 549
 550                                 ps = icalcomponent_get_first_property(cptr, ICAL_DTEND_PROPERTY);
 551                                 if (ps != NULL) {
 552                                         icalcomponent_remove_property(cptr, ps);
 553
 554                                         /* Make a new dtend */
 555                                         ps = icalproperty_new_dtend(icaltime_add(next, dur));
 556
 557                                         /* and stick it somewhere */
 558                                         icalcomponent_add_property(cptr, ps);
 559                                 }
 560
 561                         }
 562
 563                         /* Dezonify and decapsulate at the very last moment */
 564                         ical_dezonify(Cal->cal);
 565                         if (icalcomponent_isa(Cal->cal) != ICAL_VEVENT_COMPONENT) {
 566                                 cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
 567                                 if (cptr) {
 568                                         cptr = icalcomponent_new_clone(cptr);
 569                                         icalcomponent_free(Cal->cal);
 570                                         Cal->cal = cptr;
 571                                 }
 572                         }
 573
 574                         if ( (Cal->event_start > calv->lower_bound)
 575                            && (Cal->event_start < calv->upper_bound) ) {
 576                                 Put(WCC->disp_cal_items,
 577                                         (char*) &Cal->event_start,
 578                                         sizeof(Cal->event_start),
 579                                         Cal,
 580                                         delete_cal
 581                                 );
 582                         }
 583                         else {
 584                                 delete_cal(Cal);
 585                         }
 586
 587                         /* If an upper bound is set, stop when we go out of scope */
 588                         if (final_recurrence > calv->upper_bound) stop_rr = 1;
 589                 }
 590         }
 591         icalrecur_iterator_free(ritr);
 592         /* lprintf(9, "Performed %d recurrences; final one is %s", num_recur, ctime(&final_recurrence)); */
 593
 594 }
 595
 596
 597
 598
 599
 600
 601 void process_ical_object(long msgnum, int unread,
 602                          char *from,
 603                          char *FlatIcal,
 604                          icalcomponent_kind which_kind,
 605                          IcalCallbackFunc CallBack,
 606                          calview *calv
 607         )
 608 {
 609         icalcomponent *cal, *c;
 610
 611         cal = icalcomponent_new_from_string(FlatIcal);
 612         if (cal != NULL) {
 613
 614                 /* A which_kind of (-1) means just load the whole thing */
 615                 if (which_kind == (-1)) {
 616                         CallBack(cal, msgnum, from, unread, calv);
 617                 }
 618
 619                 /* Otherwise recurse and hunt */
 620                 else {
 621
 622                         /* Simple components of desired type */
 623                         if (icalcomponent_isa(cal) == which_kind) {
 624                                 CallBack(cal, msgnum, from, unread, calv);
 625                         }
 626
 627                         /* Subcomponents of desired type */
 628                         for (c = icalcomponent_get_first_component(cal, which_kind);
 629                              (c != 0);
 630                              c = icalcomponent_get_next_component(cal, which_kind)) {
 631                                 CallBack(c, msgnum, from, unread, calv);
 632                         }
 633
 634                 }
 635
 636                 icalcomponent_free(cal);
 637         }
 638 }
 639
 640 /*
 641  * Code common to all icalendar display handlers.  Given a message number and a MIME
 642  * type, we load the message and hunt for that MIME type.  If found, we load
 643  * the relevant part, deserialize it into a libical component, filter it for
 644  * the requested object type, and feed it to the specified handler.
 645  */
 646 void load_ical_object(long msgnum, int unread,
 647                       icalcomponent_kind which_kind,
 648                       IcalCallbackFunc CallBack,
 649                       calview *calv,
 650                       int RenderAsync
 651         )
 652 {
 653         StrBuf *Buf;
 654         StrBuf *Data = NULL;
 655         const char *bptr;
 656         int Done = 0;
 657         char from[128] = "";
 658         char mime_partnum[256];
 659         char mime_filename[256];
 660         char mime_content_type[256];
 661         char mime_disposition[256];
 662         int mime_length;
 663         char relevant_partnum[256];
 664         char *relevant_source = NULL;
 665         int phase = 0;                          /* 0 = citadel headers, 1 = mime headers, 2 = body */
 666         char msg4_content_type[256] = "";
 667         char msg4_content_encoding[256] = "";
 668         int msg4_content_length = 0;
 669
 670         relevant_partnum[0] = '\0';
 671         serv_printf("MSG4 %ld", msgnum);        /* we need the mime headers */
 672         Buf = NewStrBuf();
 673         StrBuf_ServGetln(Buf);
 674         if (GetServerStatus(Buf, NULL) != 1) {
 675                 FreeStrBuf (&Buf);
 676                 return;
 677         }
 678         while (!Done && (StrBuf_ServGetln(Buf)>=0)) {
 679                 if ( (StrLength(Buf)==3) &&
 680                      !strcmp(ChrPtr(Buf), "000")) {
 681                         Done = 1;
 682                         break;
 683                 }
 684                 bptr = ChrPtr(Buf);
 685                 switch (phase) {
 686                 case 0:
 687                         if (!strncasecmp(bptr, "part=", 5)) {
 688                                 extract_token(mime_filename, &bptr[5], 1, '|', sizeof mime_filename);
 689                                 extract_token(mime_partnum, &bptr[5], 2, '|', sizeof mime_partnum);
 690                                 extract_token(mime_disposition, &bptr[5], 3, '|', sizeof mime_disposition);
 691                                 extract_token(mime_content_type, &bptr[5], 4, '|', sizeof mime_content_type);
 692                                 mime_length = extract_int(&bptr[5], 5);
 693
 694                                 if (  (!strcasecmp(mime_content_type, "text/calendar"))
 695                                       || (!strcasecmp(mime_content_type, "application/ics"))
 696                                       || (!strcasecmp(mime_content_type, "text/vtodo"))
 697                                       || (!strcasecmp(mime_content_type, "text/todo"))
 698                                         ) {
 699                                         strcpy(relevant_partnum, mime_partnum);
 700                                 }
 701                         }
 702                         else if (!strncasecmp(bptr, "from=", 4)) {
 703                                 extract_token(from, bptr, 1, '=', sizeof(from));
 704                         }
 705                         else if ((phase == 0) && (!strncasecmp(bptr, "text", 4))) {
 706                                 phase = 1;
 707                         }
 708                 break;
 709                 case 1:
 710                         if (!IsEmptyStr(bptr)) {
 711                                 if (!strncasecmp(bptr, "Content-type: ", 14)) {
 712                                         safestrncpy(msg4_content_type, &bptr[14], sizeof msg4_content_type);
 713                                         striplt(msg4_content_type);
 714                                 }
 715                                 else if (!strncasecmp(bptr, "Content-transfer-encoding: ", 27)) {
 716                                         safestrncpy(msg4_content_encoding, &bptr[27], sizeof msg4_content_encoding);
 717                                         striplt(msg4_content_type);
 718                                 }
 719                                 else if ((!strncasecmp(bptr, "Content-length: ", 16))) {
 720                                         msg4_content_length = atoi(&bptr[16]);
 721                                 }
 722                                 break;
 723                         }
 724                         else {
 725                                 phase++;
 726
 727                                 if ((msg4_content_length > 0)
 728                                     && ( !strcasecmp(msg4_content_encoding, "7bit"))
 729                                     && ((!strcasecmp(mime_content_type, "text/calendar"))
 730                                         || (!strcasecmp(mime_content_type, "application/ics"))
 731                                         || (!strcasecmp(mime_content_type, "text/vtodo"))
 732                                         || (!strcasecmp(mime_content_type, "text/todo"))
 733                                             )
 734                                         )
 735                                 {
 736                                 }
 737                         }
 738                 case 2:
 739                         if (Data == NULL)
 740                                 Data = NewStrBufPlain(NULL, msg4_content_length * 2);
 741                         if (msg4_content_length > 0) {
 742                                 StrBuf_ServGetBLOBBuffered(Data, msg4_content_length);
 743                                 phase ++;
 744                         }
 745                         else {
 746                                 StrBufAppendBuf(Data, Buf, 0);
 747                                 StrBufAppendBufPlain(Data, "\r\n", 1, 0);
 748                         }
 749                 case 3:
 750                         StrBufAppendBuf(Data, Buf, 0);
 751                 }
 752         }
 753         FreeStrBuf(&Buf);
 754
 755         /* If MSG4 didn't give us the part we wanted, but we know that we can find it
 756          * as one of the other MIME parts, attempt to load it now.
 757          */
 758         if ((Data == NULL) && (!IsEmptyStr(relevant_partnum))) {
 759                 Data = load_mimepart(msgnum, relevant_partnum);
 760         }
 761
 762         if (Data != NULL) {
 763                 relevant_source = (char*) ChrPtr(Data);
 764                 process_ical_object(msgnum, unread,
 765                                     from,
 766                                     relevant_source,
 767                                     which_kind,
 768                                     CallBack,
 769                                     calv);
 770         }
 771         FreeStrBuf (&Data);
 772
 773         icalmemory_free_ring();
 774 }
 775
 776 /*
 777  * Display a calendar item
 778  */
 779 int calendar_LoadMsgFromServer(SharedMessageStatus *Stat,
 780                                void **ViewSpecific,
 781                                message_summary* Msg,
 782                                int is_new,
 783                                int i)
 784 {
 785         calview *c = (calview*) *ViewSpecific;
 786         load_ical_object(Msg->msgnum, is_new, (-1), display_individual_cal, c, 1);
 787         return 0;
 788 }
 789
 790 /*
 791  * display the editor component for an event
 792  */
 793 void display_edit_event(void) {
 794         long msgnum = 0L;
 795
 796         msgnum = lbstr("msgnum");
 797         if (msgnum > 0L) {
 798                 /* existing event */
 799                 load_ical_object(msgnum, 0, ICAL_VEVENT_COMPONENT, display_edit_individual_event, NULL, 0);
 800         }
 801         else {
 802                 /* new event */
 803                 display_edit_individual_event(NULL, 0L, "", 0, NULL);
 804         }
 805 }
 806
 807 /*
 808  * save an edited event
 809  */
 810 void save_event(void) {
 811         long msgnum = 0L;
 812
 813         msgnum = lbstr("msgnum");
 814
 815         if (msgnum > 0L) {
 816                 load_ical_object(msgnum, 0, (-1), save_individual_event, NULL, 0);
 817         }
 818         else {
 819                 save_individual_event(NULL, 0L, "", 0, NULL);
 820         }
 821 }
 822
 823
 824
 825
 826
 827 /*
 828  * Anonymous request of freebusy data for a user
 829  */
 830 void do_freebusy(void)
 831 {
 832         const char *req = ChrPtr(WC->Hdr->HR.ReqLine);
 833         char who[SIZ];
 834         char buf[SIZ];
 835         int len;
 836         long lines;
 837
 838         extract_token(who, req, 0, ' ', sizeof who);
 839         if (!strncasecmp(who, "/freebusy/", 10)) {
 840                 strcpy(who, &who[10]);
 841         }
 842         unescape_input(who);
 843
 844         len = strlen(who);
 845         if ( (!strcasecmp(&who[len-4], ".vcf"))
 846              || (!strcasecmp(&who[len-4], ".ifb"))
 847              || (!strcasecmp(&who[len-4], ".vfb")) ) {
 848                 who[len-4] = 0;
 849         }
 850
 851         lprintf(9, "freebusy requested for <%s>\n", who);
 852         serv_printf("ICAL freebusy|%s", who);
 853         serv_getln(buf, sizeof buf);
 854
 855         if (buf[0] != '1') {
 856                 hprintf("HTTP/1.1 404 %s\n", &buf[4]);
 857                 output_headers(0, 0, 0, 0, 0, 0);
 858                 hprintf("Content-Type: text/plain\r\n");
 859                 wc_printf("%s\n", &buf[4]);
 860                 end_burst();
 861                 return;
 862         }
 863
 864         read_server_text(WC->WBuf, &lines);
 865         http_transmit_thing("text/calendar", 0);
 866 }
 867
 868
 869
 870 int calendar_Cleanup(void **ViewSpecific)
 871 {
 872         calview *c;
 873
 874         c = (calview *) *ViewSpecific;
 875
 876         wDumpContent(1);
 877         free (c);
 878         *ViewSpecific = NULL;
 879
 880         return 0;
 881 }
 882
 883 int __calendar_Cleanup(void **ViewSpecific)
 884 {
 885         calview *c;
 886
 887         c = (calview *) *ViewSpecific;
 888
 889         free (c);
 890         *ViewSpecific = NULL;
 891
 892         return 0;
 893 }
 894
 895
 896 void
 897 InitModule_CALENDAR
 898 (void)
 899 {
 900         RegisterReadLoopHandlerset(
 901                 VIEW_CALENDAR,
 902                 calendar_GetParamsGetServerCall,
 903                 NULL,
 904                 NULL,
 905                 calendar_LoadMsgFromServer,
 906                 calendar_RenderView_or_Tail,
 907                 calendar_Cleanup);
 908
 909         RegisterReadLoopHandlerset(
 910                 VIEW_CALBRIEF,
 911                 calendar_GetParamsGetServerCall,
 912                 NULL,
 913                 NULL,
 914                 calendar_LoadMsgFromServer,
 915                 calendar_RenderView_or_Tail,
 916                 calendar_Cleanup);
 917
 918
 919
 920         RegisterPreference("daystart", _("Calendar day view begins at:"), PRF_INT, NULL);
 921         RegisterPreference("dayend", _("Calendar day view ends at:"), PRF_INT, NULL);
 922         RegisterPreference("weekstart", _("Week starts on:"), PRF_INT, NULL);
 923
 924         WebcitAddUrlHandler(HKEY("freebusy"), "", 0, do_freebusy, COOKIEUNNEEDED|ANONYMOUS|FORCE_SESSIONCLOSE);
 925         WebcitAddUrlHandler(HKEY("display_edit_task"), "", 0, display_edit_task, 0);
 926         WebcitAddUrlHandler(HKEY("display_edit_event"), "", 0, display_edit_event, 0);
 927         WebcitAddUrlHandler(HKEY("save_event"), "", 0, save_event, 0);
 928         WebcitAddUrlHandler(HKEY("respond_to_request"), "", 0, respond_to_request, 0);
 929         WebcitAddUrlHandler(HKEY("handle_rsvp"), "", 0, handle_rsvp, 0);
 930 }