citadel/modules/calendar/serv_calendar.c

   1 /*
   2  * $Id$
   3  *
   4  * This module implements iCalendar object processing and the Calendar>
   5  * room on a Citadel server.  It handles iCalendar objects using the
   6  * iTIP protocol.  See RFCs 2445 and 2446.
   7  *
   8  */
   9
  10 #define PRODID "-//Citadel//NONSGML Citadel Calendar//EN"
  11
  12 #include "sysdep.h"
  13 #include <stdlib.h>
  14 #include <unistd.h>
  15 #include <sys/types.h>
  16 #include <limits.h>
  17 #include <stdio.h>
  18 #include <string.h>
  19 #ifdef HAVE_STRINGS_H
  20 #include <strings.h>
  21 #endif
  22 #include "citadel.h"
  23 #include "server.h"
  24 #include "citserver.h"
  25 #include "support.h"
  26 #include "config.h"
  27 #include "user_ops.h"
  28 #include "room_ops.h"
  29 #include "tools.h"
  30 #include "msgbase.h"
  31 #include "mime_parser.h"
  32 #include "internet_addressing.h"
  33 #include "serv_calendar.h"
  34 #include "euidindex.h"
  35 #include "ctdl_module.h"
  36
  37 #ifdef CITADEL_WITH_CALENDAR_SERVICE
  38
  39 #include <ical.h>
  40 #include "ical_dezonify.h"
  41
  42
  43
  44 struct ical_respond_data {
  45         char desired_partnum[SIZ];
  46         icalcomponent *cal;
  47 };
  48
  49
  50 /*
  51  * Utility function to create a new VCALENDAR component with some of the
  52  * required fields already set the way we like them.
  53  */
  54 icalcomponent *icalcomponent_new_citadel_vcalendar(void) {
  55         icalcomponent *encaps;
  56
  57         encaps = icalcomponent_new_vcalendar();
  58         if (encaps == NULL) {
  59                 lprintf(CTDL_CRIT, "Error at %s:%d - could not allocate component!\n",
  60                         __FILE__, __LINE__);
  61                 return NULL;
  62         }
  63
  64         /* Set the Product ID */
  65         icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
  66
  67         /* Set the Version Number */
  68         icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
  69
  70         return(encaps);
  71 }
  72
  73
  74 /*
  75  * Utility function to encapsulate a subcomponent into a full VCALENDAR
  76  */
  77 icalcomponent *ical_encapsulate_subcomponent(icalcomponent *subcomp) {
  78         icalcomponent *encaps;
  79
  80         /* If we're already looking at a full VCALENDAR component,
  81          * don't bother ... just return itself.
  82          */
  83         if (icalcomponent_isa(subcomp) == ICAL_VCALENDAR_COMPONENT) {
  84                 return subcomp;
  85         }
  86
  87         /* Encapsulate the VEVENT component into a complete VCALENDAR */
  88         encaps = icalcomponent_new_citadel_vcalendar();
  89         if (encaps == NULL) return NULL;
  90
  91         /* Encapsulate the subcomponent inside */
  92         icalcomponent_add_component(encaps, subcomp);
  93
  94         /* Convert all timestamps to UTC so we don't have to deal with
  95          * stupid VTIMEZONE crap.
  96          */
  97         ical_dezonify(encaps);
  98
  99         /* Return the object we just created. */
 100         return(encaps);
 101 }
 102
 103
 104
 105
 106 /*
 107  * Write a calendar object into the specified user's calendar room.
 108  * If the supplied user is NULL, this function writes the calendar object
 109  * to the currently selected room.
 110  */
 111 void ical_write_to_cal(struct ctdluser *u, icalcomponent *cal) {
 112         char temp[PATH_MAX];
 113         FILE *fp = NULL;
 114         char *ser = NULL;
 115         icalcomponent *encaps = NULL;
 116         struct CtdlMessage *msg = NULL;
 117
 118         if (cal == NULL) return;
 119
 120         /* If the supplied object is a subcomponent, encapsulate it in
 121          * a full VCALENDAR component, and save that instead.
 122          */
 123         if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
 124                 encaps = ical_encapsulate_subcomponent(icalcomponent_new_clone(cal));
 125                 ical_write_to_cal(u, encaps);
 126                 icalcomponent_free(encaps);
 127                 return;
 128         }
 129
 130         ser = icalcomponent_as_ical_string(cal);
 131         if (ser == NULL) return;
 132
 133         /* If the caller supplied a user, write to that user's default calendar room */
 134         if (u) {
 135                 /* Make a temp file out of it */
 136                 CtdlMakeTempFileName(temp, sizeof temp);
 137                 fp = fopen(temp, "w");
 138                 if (fp != NULL) {
 139                         fwrite(ser, strlen(ser), 1, fp);
 140                         fclose(fp);
 141
 142                         /* This handy API function does all the work for us. */
 143                         CtdlWriteObject(USERCALENDARROOM,       /* which room */
 144                                 "text/calendar",        /* MIME type */
 145                                 temp,                   /* temp file */
 146                                 u,                      /* which user */
 147                                 0,                      /* not binary */
 148                                 0,                      /* don't delete others of this type */
 149                                 0                       /* no flags */
 150                         );
 151                         unlink(temp);
 152                 }
 153         }
 154
 155         /* If the caller did not supply a user, write to the currently selected room */
 156         if (!u) {
 157                 msg = malloc(sizeof(struct CtdlMessage));
 158                 memset(msg, 0, sizeof(struct CtdlMessage));
 159                 msg->cm_magic = CTDLMESSAGE_MAGIC;
 160                 msg->cm_anon_type = MES_NORMAL;
 161                 msg->cm_format_type = 4;
 162                 msg->cm_fields['A'] = strdup(CC->user.fullname);
 163                 msg->cm_fields['O'] = strdup(CC->room.QRname);
 164                 msg->cm_fields['N'] = strdup(config.c_nodename);
 165                 msg->cm_fields['H'] = strdup(config.c_humannode);
 166                 msg->cm_fields['M'] = malloc(strlen(ser) + 40);
 167                 strcpy(msg->cm_fields['M'], "Content-type: text/calendar\r\n\r\n");
 168                 strcat(msg->cm_fields['M'], ser);
 169
 170                 /* Now write the data */
 171                 CtdlSubmitMsg(msg, NULL, "");
 172                 CtdlFreeMessage(msg);
 173         }
 174
 175         /* In either case, now we can free the serialized calendar object */
 176         free(ser);
 177 }
 178
 179
 180 /*
 181  * Add a calendar object to the user's calendar
 182  *
 183  * ok because it uses ical_write_to_cal()
 184  */
 185 void ical_add(icalcomponent *cal, int recursion_level) {
 186         icalcomponent *c;
 187
 188         /*
 189          * The VEVENT subcomponent is the one we're interested in saving.
 190          */
 191         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 192
 193                 ical_write_to_cal(&CC->user, cal);
 194
 195         }
 196
 197         /* If the component has subcomponents, recurse through them. */
 198         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 199             (c != 0);
 200             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 201                 /* Recursively process subcomponent */
 202                 ical_add(c, recursion_level+1);
 203         }
 204
 205 }
 206
 207
 208
 209 /*
 210  * Send a reply to a meeting invitation.
 211  *
 212  * 'request' is the invitation to reply to.
 213  * 'action' is the string "accept" or "decline" or "tentative".
 214  *
 215  */
 216 void ical_send_a_reply(icalcomponent *request, char *action) {
 217         icalcomponent *the_reply = NULL;
 218         icalcomponent *vevent = NULL;
 219         icalproperty *attendee = NULL;
 220         char attendee_string[SIZ];
 221         icalproperty *organizer = NULL;
 222         char organizer_string[SIZ];
 223         icalproperty *summary = NULL;
 224         char summary_string[SIZ];
 225         icalproperty *me_attend = NULL;
 226         struct recptypes *recp = NULL;
 227         icalparameter *partstat = NULL;
 228         char *serialized_reply = NULL;
 229         char *reply_message_text = NULL;
 230         struct CtdlMessage *msg = NULL;
 231         struct recptypes *valid = NULL;
 232
 233         strcpy(organizer_string, "");
 234         strcpy(summary_string, "Calendar item");
 235
 236         if (request == NULL) {
 237                 lprintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
 238                 return;
 239         }
 240
 241         the_reply = icalcomponent_new_clone(request);
 242         if (the_reply == NULL) {
 243                 lprintf(CTDL_ERR, "ERROR: cannot clone request\n");
 244                 return;
 245         }
 246
 247         /* Change the method from REQUEST to REPLY */
 248         icalcomponent_set_method(the_reply, ICAL_METHOD_REPLY);
 249
 250         vevent = icalcomponent_get_first_component(the_reply, ICAL_VEVENT_COMPONENT);
 251         if (vevent != NULL) {
 252                 /* Hunt for attendees, removing ones that aren't us.
 253                  * (Actually, remove them all, cloning our own one so we can
 254                  * re-insert it later)
 255                  */
 256                 while (attendee = icalcomponent_get_first_property(vevent,
 257                     ICAL_ATTENDEE_PROPERTY), (attendee != NULL)
 258                 ) {
 259                         if (icalproperty_get_attendee(attendee)) {
 260                                 strcpy(attendee_string,
 261                                         icalproperty_get_attendee(attendee) );
 262                                 if (!strncasecmp(attendee_string, "MAILTO:", 7)) {
 263                                         strcpy(attendee_string, &attendee_string[7]);
 264                                         striplt(attendee_string);
 265                                         recp = validate_recipients(attendee_string);
 266                                         if (recp != NULL) {
 267                                                 if (!strcasecmp(recp->recp_local, CC->user.fullname)) {
 268                                                         if (me_attend) icalproperty_free(me_attend);
 269                                                         me_attend = icalproperty_new_clone(attendee);
 270                                                 }
 271                                                 free_recipients(recp);
 272                                         }
 273                                 }
 274                         }
 275                         /* Remove it... */
 276                         icalcomponent_remove_property(vevent, attendee);
 277                         icalproperty_free(attendee);
 278                 }
 279
 280                 /* We found our own address in the attendee list. */
 281                 if (me_attend) {
 282                         /* Change the partstat from NEEDS-ACTION to ACCEPT or DECLINE */
 283                         icalproperty_remove_parameter(me_attend, ICAL_PARTSTAT_PARAMETER);
 284
 285                         if (!strcasecmp(action, "accept")) {
 286                                 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_ACCEPTED);
 287                         }
 288                         else if (!strcasecmp(action, "decline")) {
 289                                 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_DECLINED);
 290                         }
 291                         else if (!strcasecmp(action, "tentative")) {
 292                                 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE);
 293                         }
 294
 295                         if (partstat) icalproperty_add_parameter(me_attend, partstat);
 296
 297                         /* Now insert it back into the vevent. */
 298                         icalcomponent_add_property(vevent, me_attend);
 299                 }
 300
 301                 /* Figure out who to send this thing to */
 302                 organizer = icalcomponent_get_first_property(vevent, ICAL_ORGANIZER_PROPERTY);
 303                 if (organizer != NULL) {
 304                         if (icalproperty_get_organizer(organizer)) {
 305                                 strcpy(organizer_string,
 306                                         icalproperty_get_organizer(organizer) );
 307                         }
 308                 }
 309                 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
 310                         strcpy(organizer_string, &organizer_string[7]);
 311                         striplt(organizer_string);
 312                 } else {
 313                         strcpy(organizer_string, "");
 314                 }
 315
 316                 /* Extract the summary string -- we'll use it as the
 317                  * message subject for the reply
 318                  */
 319                 summary = icalcomponent_get_first_property(vevent, ICAL_SUMMARY_PROPERTY);
 320                 if (summary != NULL) {
 321                         if (icalproperty_get_summary(summary)) {
 322                                 strcpy(summary_string,
 323                                         icalproperty_get_summary(summary) );
 324                         }
 325                 }
 326         }
 327
 328         /* Now generate the reply message and send it out. */
 329         serialized_reply = strdup(icalcomponent_as_ical_string(the_reply));
 330         icalcomponent_free(the_reply);  /* don't need this anymore */
 331         if (serialized_reply == NULL) return;
 332
 333         reply_message_text = malloc(strlen(serialized_reply) + SIZ);
 334         if (reply_message_text != NULL) {
 335                 sprintf(reply_message_text,
 336                         "Content-type: text/calendar charset=\"utf-8\"\r\n\r\n%s\r\n",
 337                         serialized_reply
 338                 );
 339
 340                 msg = CtdlMakeMessage(&CC->user,
 341                         organizer_string,       /* to */
 342                         "",                     /* cc */
 343                         CC->room.QRname, 0, FMT_RFC822,
 344                         "",
 345                         "",
 346                         summary_string,         /* Use summary for subject */
 347                         NULL,
 348                         reply_message_text);
 349
 350                 if (msg != NULL) {
 351                         valid = validate_recipients(organizer_string);
 352                         CtdlSubmitMsg(msg, valid, "");
 353                         CtdlFreeMessage(msg);
 354                         free_recipients(valid);
 355                 }
 356         }
 357         free(serialized_reply);
 358 }
 359
 360
 361
 362 /*
 363  * Callback function for mime parser that hunts for calendar content types
 364  * and turns them into calendar objects
 365  */
 366 void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
 367                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 368                 void *cbuserdata) {
 369
 370         struct ical_respond_data *ird = NULL;
 371
 372         ird = (struct ical_respond_data *) cbuserdata;
 373
 374         /* desired_partnum can be set to "_HUNT_" to have it just look for
 375          * the first part with a content type of text/calendar.  Otherwise
 376          * we have to only process the right one.
 377          */
 378         if (strcasecmp(ird->desired_partnum, "_HUNT_")) {
 379                 if (strcasecmp(partnum, ird->desired_partnum)) {
 380                         return;
 381                 }
 382         }
 383
 384         if (strcasecmp(cbtype, "text/calendar")) {
 385                 return;
 386         }
 387
 388         if (ird->cal != NULL) {
 389                 icalcomponent_free(ird->cal);
 390                 ird->cal = NULL;
 391         }
 392
 393         ird->cal = icalcomponent_new_from_string(content);
 394         if (ird->cal != NULL) {
 395                 ical_dezonify(ird->cal);
 396         }
 397 }
 398
 399
 400 /*
 401  * Respond to a meeting request.
 402  */
 403 void ical_respond(long msgnum, char *partnum, char *action) {
 404         struct CtdlMessage *msg = NULL;
 405         struct ical_respond_data ird;
 406
 407         if (
 408            (strcasecmp(action, "accept"))
 409            && (strcasecmp(action, "decline"))
 410         ) {
 411                 cprintf("%d Action must be 'accept' or 'decline'\n",
 412                         ERROR + ILLEGAL_VALUE
 413                 );
 414                 return;
 415         }
 416
 417         msg = CtdlFetchMessage(msgnum, 1);
 418         if (msg == NULL) {
 419                 cprintf("%d Message %ld not found.\n",
 420                         ERROR + ILLEGAL_VALUE,
 421                         (long)msgnum
 422                 );
 423                 return;
 424         }
 425
 426         memset(&ird, 0, sizeof ird);
 427         strcpy(ird.desired_partnum, partnum);
 428         mime_parser(msg->cm_fields['M'],
 429                 NULL,
 430                 *ical_locate_part,              /* callback function */
 431                 NULL, NULL,
 432                 (void *) &ird,                  /* user data */
 433                 0
 434         );
 435
 436         /* We're done with the incoming message, because we now have a
 437          * calendar object in memory.
 438          */
 439         CtdlFreeMessage(msg);
 440
 441         /*
 442          * Here is the real meat of this function.  Handle the event.
 443          */
 444         if (ird.cal != NULL) {
 445                 /* Save this in the user's calendar if necessary */
 446                 if (!strcasecmp(action, "accept")) {
 447                         ical_add(ird.cal, 0);
 448                 }
 449
 450                 /* Send a reply if necessary */
 451                 if (icalcomponent_get_method(ird.cal) == ICAL_METHOD_REQUEST) {
 452                         ical_send_a_reply(ird.cal, action);
 453                 }
 454
 455                 /* Now that we've processed this message, we don't need it
 456                  * anymore.  So delete it.  (NOTE we don't do this anymore.)
 457                 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
 458                  */
 459
 460                 /* Free the memory we allocated and return a response. */
 461                 icalcomponent_free(ird.cal);
 462                 ird.cal = NULL;
 463                 cprintf("%d ok\n", CIT_OK);
 464                 return;
 465         }
 466         else {
 467                 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
 468                 return;
 469         }
 470
 471         /* should never get here */
 472 }
 473
 474
 475 /*
 476  * Figure out the UID of the calendar event being referred to in a
 477  * REPLY object.  This function is recursive.
 478  */
 479 void ical_learn_uid_of_reply(char *uidbuf, icalcomponent *cal) {
 480         icalcomponent *subcomponent;
 481         icalproperty *p;
 482
 483         /* If this object is a REPLY, then extract the UID. */
 484         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 485                 p = icalcomponent_get_first_property(cal, ICAL_UID_PROPERTY);
 486                 if (p != NULL) {
 487                         strcpy(uidbuf, icalproperty_get_comment(p));
 488                 }
 489         }
 490
 491         /* Otherwise, recurse through any VEVENT subcomponents.  We do NOT want the
 492          * UID of the reply; we want the UID of the invitation being replied to.
 493          */
 494         for (subcomponent = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
 495             subcomponent != NULL;
 496             subcomponent = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT) ) {
 497                 ical_learn_uid_of_reply(uidbuf, subcomponent);
 498         }
 499 }
 500
 501
 502 /*
 503  * ical_update_my_calendar_with_reply() refers to this callback function; when we
 504  * locate the message containing the calendar event we're replying to, this function
 505  * gets called.  It basically just sticks the message number in a supplied buffer.
 506  */
 507 void ical_hunt_for_event_to_update(long msgnum, void *data) {
 508         long *msgnumptr;
 509
 510         msgnumptr = (long *) data;
 511         *msgnumptr = msgnum;
 512 }
 513
 514
 515 struct original_event_container {
 516         icalcomponent *c;
 517 };
 518
 519 /*
 520  * Callback function for mime parser that hunts for calendar content types
 521  * and turns them into calendar objects (called by ical_update_my_calendar_with_reply()
 522  * to fetch the object being updated)
 523  */
 524 void ical_locate_original_event(char *name, char *filename, char *partnum, char *disp,
 525                 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
 526                 void *cbuserdata) {
 527
 528         struct original_event_container *oec = NULL;
 529
 530         if (strcasecmp(cbtype, "text/calendar")) {
 531                 return;
 532         }
 533         oec = (struct original_event_container *) cbuserdata;
 534         if (oec->c != NULL) {
 535                 icalcomponent_free(oec->c);
 536         }
 537         oec->c = icalcomponent_new_from_string(content);
 538 }
 539
 540
 541 /*
 542  * Merge updated attendee information from a REPLY into an existing event.
 543  */
 544 void ical_merge_attendee_reply(icalcomponent *event, icalcomponent *reply) {
 545         icalcomponent *c;
 546         icalproperty *e_attendee, *r_attendee;
 547
 548         /* First things first.  If we're not looking at a VEVENT component,
 549          * recurse through subcomponents until we find one.
 550          */
 551         if (icalcomponent_isa(event) != ICAL_VEVENT_COMPONENT) {
 552                 for (c = icalcomponent_get_first_component(event, ICAL_VEVENT_COMPONENT);
 553                     c != NULL;
 554                     c = icalcomponent_get_next_component(event, ICAL_VEVENT_COMPONENT) ) {
 555                         ical_merge_attendee_reply(c, reply);
 556                 }
 557                 return;
 558         }
 559
 560         /* Now do the same thing with the reply.
 561          */
 562         if (icalcomponent_isa(reply) != ICAL_VEVENT_COMPONENT) {
 563                 for (c = icalcomponent_get_first_component(reply, ICAL_VEVENT_COMPONENT);
 564                     c != NULL;
 565                     c = icalcomponent_get_next_component(reply, ICAL_VEVENT_COMPONENT) ) {
 566                         ical_merge_attendee_reply(event, c);
 567                 }
 568                 return;
 569         }
 570
 571         /* Clone the reply, because we're going to rip its guts out. */
 572         reply = icalcomponent_new_clone(reply);
 573
 574         /* At this point we're looking at the correct subcomponents.
 575          * Iterate through the attendees looking for a match.
 576          */
 577 STARTOVER:
 578         for (e_attendee = icalcomponent_get_first_property(event, ICAL_ATTENDEE_PROPERTY);
 579             e_attendee != NULL;
 580             e_attendee = icalcomponent_get_next_property(event, ICAL_ATTENDEE_PROPERTY)) {
 581
 582                 for (r_attendee = icalcomponent_get_first_property(reply, ICAL_ATTENDEE_PROPERTY);
 583                     r_attendee != NULL;
 584                     r_attendee = icalcomponent_get_next_property(reply, ICAL_ATTENDEE_PROPERTY)) {
 585
 586                         /* Check to see if these two attendees match...
 587                          */
 588                         if (!strcasecmp(
 589                            icalproperty_get_attendee(e_attendee),
 590                            icalproperty_get_attendee(r_attendee)
 591                         )) {
 592                                 /* ...and if they do, remove the attendee from the event
 593                                  * and replace it with the attendee from the reply.  (The
 594                                  * reply's copy will have the same address, but an updated
 595                                  * status.)
 596                                  */
 597                                 icalcomponent_remove_property(event, e_attendee);
 598                                 icalproperty_free(e_attendee);
 599                                 icalcomponent_remove_property(reply, r_attendee);
 600                                 icalcomponent_add_property(event, r_attendee);
 601
 602                                 /* Since we diddled both sets of attendees, we have to start
 603                                  * the iteration over again.  This will not create an infinite
 604                                  * loop because we removed the attendee from the reply.  (That's
 605                                  * why we cloned the reply, and that's what we mean by "ripping
 606                                  * its guts out.")
 607                                  */
 608                                 goto STARTOVER;
 609                         }
 610
 611                 }
 612         }
 613
 614         /* Free the *clone* of the reply. */
 615         icalcomponent_free(reply);
 616 }
 617
 618
 619
 620
 621 /*
 622  * Handle an incoming RSVP (object with method==ICAL_METHOD_REPLY) for a
 623  * calendar event.  The object has already been deserialized for us; all
 624  * we have to do here is hunt for the event in our calendar, merge in the
 625  * updated attendee status, and save it again.
 626  *
 627  * This function returns 0 on success, 1 if the event was not found in the
 628  * user's calendar, or 2 if an internal error occurred.
 629  */
 630 int ical_update_my_calendar_with_reply(icalcomponent *cal) {
 631         char uid[SIZ];
 632         char hold_rm[ROOMNAMELEN];
 633         long msgnum_being_replaced = 0;
 634         struct CtdlMessage *msg = NULL;
 635         struct original_event_container oec;
 636         icalcomponent *original_event;
 637         char *serialized_event = NULL;
 638         char roomname[ROOMNAMELEN];
 639         char *message_text = NULL;
 640
 641         /* Figure out just what event it is we're dealing with */
 642         strcpy(uid, "--==<< InVaLiD uId >>==--");
 643         ical_learn_uid_of_reply(uid, cal);
 644         lprintf(CTDL_DEBUG, "UID of event being replied to is <%s>\n", uid);
 645
 646         strcpy(hold_rm, CC->room.QRname);       /* save current room */
 647
 648         if (getroom(&CC->room, USERCALENDARROOM) != 0) {
 649                 getroom(&CC->room, hold_rm);
 650                 lprintf(CTDL_CRIT, "cannot get user calendar room\n");
 651                 return(2);
 652         }
 653
 654         /*
 655          * Look in the EUID index for a message with
 656          * the Citadel EUID set to the value we're looking for.  Since
 657          * Citadel always sets the message EUID to the vCalendar UID of
 658          * the event, this will work.
 659          */
 660         msgnum_being_replaced = locate_message_by_euid(uid, &CC->room);
 661
 662         getroom(&CC->room, hold_rm);    /* return to saved room */
 663
 664         lprintf(CTDL_DEBUG, "msgnum_being_replaced == %ld\n", msgnum_being_replaced);
 665         if (msgnum_being_replaced == 0) {
 666                 return(1);                      /* no calendar event found */
 667         }
 668
 669         /* Now we know the ID of the message containing the event being updated.
 670          * We don't actually have to delete it; that'll get taken care of by the
 671          * server when we save another event with the same UID.  This just gives
 672          * us the ability to load the event into memory so we can diddle the
 673          * attendees.
 674          */
 675         msg = CtdlFetchMessage(msgnum_being_replaced, 1);
 676         if (msg == NULL) {
 677                 return(2);                      /* internal error */
 678         }
 679         oec.c = NULL;
 680         mime_parser(msg->cm_fields['M'],
 681                 NULL,
 682                 *ical_locate_original_event,    /* callback function */
 683                 NULL, NULL,
 684                 &oec,                           /* user data */
 685                 0
 686         );
 687         CtdlFreeMessage(msg);
 688
 689         original_event = oec.c;
 690         if (original_event == NULL) {
 691                 lprintf(CTDL_ERR, "ERROR: Original_component is NULL.\n");
 692                 return(2);
 693         }
 694
 695         /* Merge the attendee's updated status into the event */
 696         ical_merge_attendee_reply(original_event, cal);
 697
 698         /* Serialize it */
 699         serialized_event = strdup(icalcomponent_as_ical_string(original_event));
 700         icalcomponent_free(original_event);     /* Don't need this anymore. */
 701         if (serialized_event == NULL) return(2);
 702
 703         MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
 704
 705         message_text = malloc(strlen(serialized_event) + SIZ);
 706         if (message_text != NULL) {
 707                 sprintf(message_text,
 708                         "Content-type: text/calendar charset=\"utf-8\"\r\n\r\n%s\r\n",
 709                         serialized_event
 710                 );
 711
 712                 msg = CtdlMakeMessage(&CC->user,
 713                         "",                     /* No recipient */
 714                         "",                     /* No recipient */
 715                         roomname,
 716                         0, FMT_RFC822,
 717                         "",
 718                         "",
 719                         "",             /* no subject */
 720                         NULL,
 721                         message_text);
 722
 723                 if (msg != NULL) {
 724                         CIT_ICAL->avoid_sending_invitations = 1;
 725                         CtdlSubmitMsg(msg, NULL, roomname);
 726                         CtdlFreeMessage(msg);
 727                         CIT_ICAL->avoid_sending_invitations = 0;
 728                 }
 729         }
 730         free(serialized_event);
 731         return(0);
 732 }
 733
 734
 735 /*
 736  * Handle an incoming RSVP for an event.  (This is the server subcommand part; it
 737  * simply extracts the calendar object from the message, deserializes it, and
 738  * passes it up to ical_update_my_calendar_with_reply() for processing.
 739  */
 740 void ical_handle_rsvp(long msgnum, char *partnum, char *action) {
 741         struct CtdlMessage *msg = NULL;
 742         struct ical_respond_data ird;
 743         int ret;
 744
 745         if (
 746            (strcasecmp(action, "update"))
 747            && (strcasecmp(action, "ignore"))
 748         ) {
 749                 cprintf("%d Action must be 'update' or 'ignore'\n",
 750                         ERROR + ILLEGAL_VALUE
 751                 );
 752                 return;
 753         }
 754
 755         msg = CtdlFetchMessage(msgnum, 1);
 756         if (msg == NULL) {
 757                 cprintf("%d Message %ld not found.\n",
 758                         ERROR + ILLEGAL_VALUE,
 759                         (long)msgnum
 760                 );
 761                 return;
 762         }
 763
 764         memset(&ird, 0, sizeof ird);
 765         strcpy(ird.desired_partnum, partnum);
 766         mime_parser(msg->cm_fields['M'],
 767                 NULL,
 768                 *ical_locate_part,              /* callback function */
 769                 NULL, NULL,
 770                 (void *) &ird,                  /* user data */
 771                 0
 772         );
 773
 774         /* We're done with the incoming message, because we now have a
 775          * calendar object in memory.
 776          */
 777         CtdlFreeMessage(msg);
 778
 779         /*
 780          * Here is the real meat of this function.  Handle the event.
 781          */
 782         if (ird.cal != NULL) {
 783                 /* Update the user's calendar if necessary */
 784                 if (!strcasecmp(action, "update")) {
 785                         ret = ical_update_my_calendar_with_reply(ird.cal);
 786                         if (ret == 0) {
 787                                 cprintf("%d Your calendar has been updated with this reply.\n",
 788                                         CIT_OK);
 789                         }
 790                         else if (ret == 1) {
 791                                 cprintf("%d This event does not exist in your calendar.\n",
 792                                         ERROR + FILE_NOT_FOUND);
 793                         }
 794                         else {
 795                                 cprintf("%d An internal error occurred.\n",
 796                                         ERROR + INTERNAL_ERROR);
 797                         }
 798                 }
 799                 else {
 800                         cprintf("%d This reply has been ignored.\n", CIT_OK);
 801                 }
 802
 803                 /* Now that we've processed this message, we don't need it
 804                  * anymore.  So delete it.  (Don't do this anymore.)
 805                 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
 806                  */
 807
 808                 /* Free the memory we allocated and return a response. */
 809                 icalcomponent_free(ird.cal);
 810                 ird.cal = NULL;
 811                 return;
 812         }
 813         else {
 814                 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
 815                 return;
 816         }
 817
 818         /* should never get here */
 819 }
 820
 821
 822 /*
 823  * Search for a property in both the top level and in a VEVENT subcomponent
 824  */
 825 icalproperty *ical_ctdl_get_subprop(
 826                 icalcomponent *cal,
 827                 icalproperty_kind which_prop
 828 ) {
 829         icalproperty *p;
 830         icalcomponent *c;
 831
 832         p = icalcomponent_get_first_property(cal, which_prop);
 833         if (p == NULL) {
 834                 c = icalcomponent_get_first_component(cal,
 835                                                         ICAL_VEVENT_COMPONENT);
 836                 if (c != NULL) {
 837                         p = icalcomponent_get_first_property(c, which_prop);
 838                 }
 839         }
 840         return p;
 841 }
 842
 843
 844 /*
 845  * Check to see if two events overlap.  Returns nonzero if they do.
 846  * (This function is used in both Citadel and WebCit.  If you change it in
 847  * one place, change it in the other.  Better yet, put it in a library.)
 848  */
 849 int ical_ctdl_is_overlap(
 850                         struct icaltimetype t1start,
 851                         struct icaltimetype t1end,
 852                         struct icaltimetype t2start,
 853                         struct icaltimetype t2end
 854 ) {
 855
 856         if (icaltime_is_null_time(t1start)) return(0);
 857         if (icaltime_is_null_time(t2start)) return(0);
 858
 859         /* First, check for all-day events */
 860         if (t1start.is_date) {
 861                 if (!icaltime_compare_date_only(t1start, t2start)) {
 862                         return(1);
 863                 }
 864                 if (!icaltime_is_null_time(t2end)) {
 865                         if (!icaltime_compare_date_only(t1start, t2end)) {
 866                                 return(1);
 867                         }
 868                 }
 869         }
 870
 871         if (t2start.is_date) {
 872                 if (!icaltime_compare_date_only(t2start, t1start)) {
 873                         return(1);
 874                 }
 875                 if (!icaltime_is_null_time(t1end)) {
 876                         if (!icaltime_compare_date_only(t2start, t1end)) {
 877                                 return(1);
 878                         }
 879                 }
 880         }
 881
 882         /* Now check for overlaps using date *and* time. */
 883
 884         /* First, bail out if either event 1 or event 2 is missing end time. */
 885         if (icaltime_is_null_time(t1end)) return(0);
 886         if (icaltime_is_null_time(t2end)) return(0);
 887
 888         /* If event 1 ends before event 2 starts, we're in the clear. */
 889         if (icaltime_compare(t1end, t2start) <= 0) return(0);
 890
 891         /* If event 2 ends before event 1 starts, we're also ok. */
 892         if (icaltime_compare(t2end, t1start) <= 0) return(0);
 893
 894         /* Otherwise, they overlap. */
 895         return(1);
 896 }
 897
 898
 899
 900 /*
 901  * Backend for ical_hunt_for_conflicts()
 902  */
 903 void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
 904         icalcomponent *cal;
 905         struct CtdlMessage *msg = NULL;
 906         struct ical_respond_data ird;
 907         struct icaltimetype t1start, t1end, t2start, t2end;
 908         icalproperty *p;
 909         char conflict_event_uid[SIZ];
 910         char conflict_event_summary[SIZ];
 911         char compare_uid[SIZ];
 912
 913         cal = (icalcomponent *)data;
 914         strcpy(compare_uid, "");
 915         strcpy(conflict_event_uid, "");
 916         strcpy(conflict_event_summary, "");
 917
 918         msg = CtdlFetchMessage(msgnum, 1);
 919         if (msg == NULL) return;
 920         memset(&ird, 0, sizeof ird);
 921         strcpy(ird.desired_partnum, "_HUNT_");
 922         mime_parser(msg->cm_fields['M'],
 923                 NULL,
 924                 *ical_locate_part,              /* callback function */
 925                 NULL, NULL,
 926                 (void *) &ird,                  /* user data */
 927                 0
 928         );
 929         CtdlFreeMessage(msg);
 930
 931         if (ird.cal == NULL) return;
 932
 933         t1start = icaltime_null_time();
 934         t1end = icaltime_null_time();
 935         t2start = icaltime_null_time();
 936         t1end = icaltime_null_time();
 937
 938         /* Now compare cal to ird.cal */
 939         p = ical_ctdl_get_subprop(ird.cal, ICAL_DTSTART_PROPERTY);
 940         if (p == NULL) return;
 941         if (p != NULL) t2start = icalproperty_get_dtstart(p);
 942
 943         p = ical_ctdl_get_subprop(ird.cal, ICAL_DTEND_PROPERTY);
 944         if (p != NULL) t2end = icalproperty_get_dtend(p);
 945
 946         p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
 947         if (p == NULL) return;
 948         if (p != NULL) t1start = icalproperty_get_dtstart(p);
 949
 950         p = ical_ctdl_get_subprop(cal, ICAL_DTEND_PROPERTY);
 951         if (p != NULL) t1end = icalproperty_get_dtend(p);
 952
 953         p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
 954         if (p != NULL) {
 955                 strcpy(compare_uid, icalproperty_get_comment(p));
 956         }
 957
 958         p = ical_ctdl_get_subprop(ird.cal, ICAL_UID_PROPERTY);
 959         if (p != NULL) {
 960                 strcpy(conflict_event_uid, icalproperty_get_comment(p));
 961         }
 962
 963         p = ical_ctdl_get_subprop(ird.cal, ICAL_SUMMARY_PROPERTY);
 964         if (p != NULL) {
 965                 strcpy(conflict_event_summary, icalproperty_get_comment(p));
 966         }
 967
 968         icalcomponent_free(ird.cal);
 969
 970         if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
 971                 cprintf("%ld||%s|%s|%d|\n",
 972                         msgnum,
 973                         conflict_event_uid,
 974                         conflict_event_summary,
 975                         (       ((strlen(compare_uid)>0)
 976                                 &&(!strcasecmp(compare_uid,
 977                                 conflict_event_uid))) ? 1 : 0
 978                         )
 979                 );
 980         }
 981 }
 982
 983
 984
 985 /*
 986  * Phase 2 of "hunt for conflicts" operation.
 987  * At this point we have a calendar object which represents the VEVENT that
 988  * we're considering adding to the calendar.  Now hunt through the user's
 989  * calendar room, and output zero or more existing VEVENTs which conflict
 990  * with this one.
 991  */
 992 void ical_hunt_for_conflicts(icalcomponent *cal) {
 993         char hold_rm[ROOMNAMELEN];
 994
 995         strcpy(hold_rm, CC->room.QRname);       /* save current room */
 996
 997         if (getroom(&CC->room, USERCALENDARROOM) != 0) {
 998                 getroom(&CC->room, hold_rm);
 999                 cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
1000                 return;
1001         }
1002
1003         cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
1004
1005         CtdlForEachMessage(MSGS_ALL, 0, NULL,
1006                 NULL,
1007                 NULL,
1008                 ical_hunt_for_conflicts_backend,
1009                 (void *) cal
1010         );
1011
1012         cprintf("000\n");
1013         getroom(&CC->room, hold_rm);    /* return to saved room */
1014
1015 }
1016
1017
1018
1019 /*
1020  * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
1021  */
1022 void ical_conflicts(long msgnum, char *partnum) {
1023         struct CtdlMessage *msg = NULL;
1024         struct ical_respond_data ird;
1025
1026         msg = CtdlFetchMessage(msgnum, 1);
1027         if (msg == NULL) {
1028                 cprintf("%d Message %ld not found.\n",
1029                         ERROR + ILLEGAL_VALUE,
1030                         (long)msgnum
1031                 );
1032                 return;
1033         }
1034
1035         memset(&ird, 0, sizeof ird);
1036         strcpy(ird.desired_partnum, partnum);
1037         mime_parser(msg->cm_fields['M'],
1038                 NULL,
1039                 *ical_locate_part,              /* callback function */
1040                 NULL, NULL,
1041                 (void *) &ird,                  /* user data */
1042                 0
1043         );
1044
1045         CtdlFreeMessage(msg);
1046
1047         if (ird.cal != NULL) {
1048                 ical_hunt_for_conflicts(ird.cal);
1049                 icalcomponent_free(ird.cal);
1050                 return;
1051         }
1052         else {
1053                 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
1054                 return;
1055         }
1056
1057         /* should never get here */
1058 }
1059
1060
1061
1062 /*
1063  * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
1064  */
1065 void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *cal) {
1066         icalproperty *p;
1067         icalvalue *v;
1068         struct icalperiodtype my_period;
1069
1070         if (cal == NULL) return;
1071         my_period = icalperiodtype_null_period();
1072
1073         if (icalcomponent_isa(cal) != ICAL_VEVENT_COMPONENT) {
1074                 ical_add_to_freebusy(fb,
1075                         icalcomponent_get_first_component(
1076                                 cal, ICAL_VEVENT_COMPONENT
1077                         )
1078                 );
1079                 return;
1080         }
1081
1082         ical_dezonify(cal);
1083
1084         /* If this event is not opaque, the user isn't publishing it as
1085          * busy time, so don't bother doing anything else.
1086          */
1087         p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
1088         if (p != NULL) {
1089                 v = icalproperty_get_value(p);
1090                 if (v != NULL) {
1091                         if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
1092                                 return;
1093                         }
1094                 }
1095         }
1096
1097         /* Convert the DTSTART and DTEND properties to an icalperiod. */
1098         p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
1099         if (p != NULL) {
1100                 my_period.start = icalproperty_get_dtstart(p);
1101         }
1102
1103         p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
1104         if (p != NULL) {
1105                 my_period.end = icalproperty_get_dtstart(p);
1106         }
1107
1108         /* Now add it. */
1109         icalcomponent_add_property(fb,
1110                 icalproperty_new_freebusy(my_period)
1111         );
1112
1113         /* Make sure the DTSTART property of the freebusy *list* is set to
1114          * the DTSTART property of the *earliest event*.
1115          */
1116         p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
1117         if (p == NULL) {
1118                 icalcomponent_set_dtstart(fb,
1119                         icalcomponent_get_dtstart(cal) );
1120         }
1121         else {
1122                 if (icaltime_compare(
1123                         icalcomponent_get_dtstart(cal),
1124                         icalcomponent_get_dtstart(fb)
1125                    ) < 0) {
1126                         icalcomponent_set_dtstart(fb,
1127                                 icalcomponent_get_dtstart(cal) );
1128                 }
1129         }
1130
1131         /* Make sure the DTEND property of the freebusy *list* is set to
1132          * the DTEND property of the *latest event*.
1133          */
1134         p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
1135         if (p == NULL) {
1136                 icalcomponent_set_dtend(fb,
1137                         icalcomponent_get_dtend(cal) );
1138         }
1139         else {
1140                 if (icaltime_compare(
1141                         icalcomponent_get_dtend(cal),
1142                         icalcomponent_get_dtend(fb)
1143                    ) > 0) {
1144                         icalcomponent_set_dtend(fb,
1145                                 icalcomponent_get_dtend(cal) );
1146                 }
1147         }
1148
1149 }
1150
1151
1152
1153 /*
1154  * Backend for ical_freebusy()
1155  *
1156  * This function simply loads the messages in the user's calendar room,
1157  * which contain VEVENTs, then strips them of all non-freebusy data, and
1158  * adds them to the supplied VCALENDAR.
1159  *
1160  */
1161 void ical_freebusy_backend(long msgnum, void *data) {
1162         icalcomponent *cal;
1163         struct CtdlMessage *msg = NULL;
1164         struct ical_respond_data ird;
1165
1166         cal = (icalcomponent *)data;
1167
1168         msg = CtdlFetchMessage(msgnum, 1);
1169         if (msg == NULL) return;
1170         memset(&ird, 0, sizeof ird);
1171         strcpy(ird.desired_partnum, "_HUNT_");
1172         mime_parser(msg->cm_fields['M'],
1173                 NULL,
1174                 *ical_locate_part,              /* callback function */
1175                 NULL, NULL,
1176                 (void *) &ird,                  /* user data */
1177                 0
1178         );
1179         CtdlFreeMessage(msg);
1180
1181         if (ird.cal == NULL) return;
1182
1183         ical_add_to_freebusy(cal, ird.cal);
1184
1185         /* Now free the memory. */
1186         icalcomponent_free(ird.cal);
1187 }
1188
1189
1190
1191 /*
1192  * Grab another user's free/busy times
1193  */
1194 void ical_freebusy(char *who) {
1195         struct ctdluser usbuf;
1196         char calendar_room_name[ROOMNAMELEN];
1197         char hold_rm[ROOMNAMELEN];
1198         char *serialized_request = NULL;
1199         icalcomponent *encaps = NULL;
1200         icalcomponent *fb = NULL;
1201         int found_user = (-1);
1202         struct recptypes *recp = NULL;
1203         char buf[256];
1204         char host[256];
1205         char type[256];
1206         int i = 0;
1207         int config_lines = 0;
1208
1209         /* First try an exact match. */
1210         found_user = getuser(&usbuf, who);
1211
1212         /* If not found, try it as an unqualified email address. */
1213         if (found_user != 0) {
1214                 strcpy(buf, who);
1215                 recp = validate_recipients(buf);
1216                 lprintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1217                 if (recp != NULL) {
1218                         if (recp->num_local == 1) {
1219                                 found_user = getuser(&usbuf, recp->recp_local);
1220                         }
1221                         free_recipients(recp);
1222                 }
1223         }
1224
1225         /* If still not found, try it as an address qualified with the
1226          * primary FQDN of this Citadel node.
1227          */
1228         if (found_user != 0) {
1229                 snprintf(buf, sizeof buf, "%s@%s", who, config.c_fqdn);
1230                 lprintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1231                 recp = validate_recipients(buf);
1232                 if (recp != NULL) {
1233                         if (recp->num_local == 1) {
1234                                 found_user = getuser(&usbuf, recp->recp_local);
1235                         }
1236                         free_recipients(recp);
1237                 }
1238         }
1239
1240         /* Still not found?  Try qualifying it with every domain we
1241          * might have addresses in.
1242          */
1243         if (found_user != 0) {
1244                 config_lines = num_tokens(inetcfg, '\n');
1245                 for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
1246                         extract_token(buf, inetcfg, i, '\n', sizeof buf);
1247                         extract_token(host, buf, 0, '|', sizeof host);
1248                         extract_token(type, buf, 1, '|', sizeof type);
1249
1250                         if ( (!strcasecmp(type, "localhost"))
1251                            || (!strcasecmp(type, "directory")) ) {
1252                                 snprintf(buf, sizeof buf, "%s@%s", who, host);
1253                                 lprintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1254                                 recp = validate_recipients(buf);
1255                                 if (recp != NULL) {
1256                                         if (recp->num_local == 1) {
1257                                                 found_user = getuser(&usbuf, recp->recp_local);
1258                                         }
1259                                         free_recipients(recp);
1260                                 }
1261                         }
1262                 }
1263         }
1264
1265         if (found_user != 0) {
1266                 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
1267                 return;
1268         }
1269
1270         MailboxName(calendar_room_name, sizeof calendar_room_name,
1271                 &usbuf, USERCALENDARROOM);
1272
1273         strcpy(hold_rm, CC->room.QRname);       /* save current room */
1274
1275         if (getroom(&CC->room, calendar_room_name) != 0) {
1276                 cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
1277                 getroom(&CC->room, hold_rm);
1278                 return;
1279         }
1280
1281         /* Create a VFREEBUSY subcomponent */
1282         lprintf(CTDL_DEBUG, "Creating VFREEBUSY component\n");
1283         fb = icalcomponent_new_vfreebusy();
1284         if (fb == NULL) {
1285                 cprintf("%d Internal error: cannot allocate memory.\n",
1286                         ERROR + INTERNAL_ERROR);
1287                 icalcomponent_free(encaps);
1288                 getroom(&CC->room, hold_rm);
1289                 return;
1290         }
1291
1292         /* Set the method to PUBLISH */
1293         icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
1294
1295         /* Set the DTSTAMP to right now. */
1296         icalcomponent_set_dtstamp(fb, icaltime_from_timet(time(NULL), 0));
1297
1298         /* Add the user's email address as ORGANIZER */
1299         sprintf(buf, "MAILTO:%s", who);
1300         if (strchr(buf, '@') == NULL) {
1301                 strcat(buf, "@");
1302                 strcat(buf, config.c_fqdn);
1303         }
1304         for (i=0; buf[i]; ++i) {
1305                 if (buf[i]==' ') buf[i] = '_';
1306         }
1307         icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
1308
1309         /* Add busy time from events */
1310         lprintf(CTDL_DEBUG, "Adding busy time from events\n");
1311         CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
1312
1313         /* If values for DTSTART and DTEND are still not present, set them
1314          * to yesterday and tomorrow as default values.
1315          */
1316         if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
1317                 icalcomponent_set_dtstart(fb, icaltime_from_timet(time(NULL)-86400L, 0));
1318         }
1319         if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
1320                 icalcomponent_set_dtend(fb, icaltime_from_timet(time(NULL)+86400L, 0));
1321         }
1322
1323         /* Put the freebusy component into the calendar component */
1324         lprintf(CTDL_DEBUG, "Encapsulating\n");
1325         encaps = ical_encapsulate_subcomponent(fb);
1326         if (encaps == NULL) {
1327                 icalcomponent_free(fb);
1328                 cprintf("%d Internal error: cannot allocate memory.\n",
1329                         ERROR + INTERNAL_ERROR);
1330                 getroom(&CC->room, hold_rm);
1331                 return;
1332         }
1333
1334         /* Set the method to PUBLISH */
1335         lprintf(CTDL_DEBUG, "Setting method\n");
1336         icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1337
1338         /* Serialize it */
1339         lprintf(CTDL_DEBUG, "Serializing\n");
1340         serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1341         icalcomponent_free(encaps);     /* Don't need this anymore. */
1342
1343         cprintf("%d Here is the free/busy data:\n", LISTING_FOLLOWS);
1344         if (serialized_request != NULL) {
1345                 client_write(serialized_request, strlen(serialized_request));
1346                 free(serialized_request);
1347         }
1348         cprintf("\n000\n");
1349
1350         /* Go back to the room from which we came... */
1351         getroom(&CC->room, hold_rm);
1352 }
1353
1354
1355
1356 /*
1357  * Backend for ical_getics()
1358  *
1359  * This is a ForEachMessage() callback function that searches the current room
1360  * for calendar events and adds them each into one big calendar component.
1361  */
1362 void ical_getics_backend(long msgnum, void *data) {
1363         icalcomponent *encaps, *c;
1364         struct CtdlMessage *msg = NULL;
1365         struct ical_respond_data ird;
1366
1367         encaps = (icalcomponent *)data;
1368         if (encaps == NULL) return;
1369
1370         /* Look for the calendar event... */
1371
1372         msg = CtdlFetchMessage(msgnum, 1);
1373         if (msg == NULL) return;
1374         memset(&ird, 0, sizeof ird);
1375         strcpy(ird.desired_partnum, "_HUNT_");
1376         mime_parser(msg->cm_fields['M'],
1377                 NULL,
1378                 *ical_locate_part,              /* callback function */
1379                 NULL, NULL,
1380                 (void *) &ird,                  /* user data */
1381                 0
1382         );
1383         CtdlFreeMessage(msg);
1384
1385         if (ird.cal == NULL) return;
1386
1387         /* Here we go: put the VEVENT into the VCALENDAR.  We now no longer
1388          * are responsible for "the_request"'s memory -- it will be freed
1389          * when we free "encaps".
1390          */
1391
1392         /* If the top-level component is *not* a VCALENDAR, we can drop it right
1393          * in.  This will almost never happen.
1394          */
1395         if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
1396                 icalcomponent_add_component(encaps, ird.cal);
1397         }
1398         /*
1399          * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1400          * and other components encapsulated inside, we have to extract them.
1401          */
1402         else {
1403                 for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
1404                     (c != NULL);
1405                     c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
1406                         icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1407                 }
1408                 icalcomponent_free(ird.cal);
1409         }
1410 }
1411
1412
1413
1414 /*
1415  * Retrieve all of the calendar items in the current room, and output them
1416  * as a single icalendar object.
1417  */
1418 void ical_getics(void)
1419 {
1420         icalcomponent *encaps = NULL;
1421         char *ser = NULL;
1422
1423         if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1424            &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1425                 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1426                 return;         /* Not a vCalendar-centric room */
1427         }
1428
1429         encaps = icalcomponent_new_vcalendar();
1430         if (encaps == NULL) {
1431                 lprintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1432                         __FILE__, __LINE__);
1433                 cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
1434                 return;
1435         }
1436
1437         cprintf("%d one big calendar\n", LISTING_FOLLOWS);
1438
1439         /* Set the Product ID */
1440         icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1441
1442         /* Set the Version Number */
1443         icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1444
1445         /* Set the method to PUBLISH */
1446         icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1447
1448         /* Now go through the room encapsulating all calendar items. */
1449         CtdlForEachMessage(MSGS_ALL, 0, NULL,
1450                 NULL,
1451                 NULL,
1452                 ical_getics_backend,
1453                 (void *) encaps
1454         );
1455
1456         ser = strdup(icalcomponent_as_ical_string(encaps));
1457         client_write(ser, strlen(ser));
1458         free(ser);
1459         cprintf("\n000\n");
1460         icalcomponent_free(encaps);     /* Don't need this anymore. */
1461
1462 }
1463
1464
1465 /*
1466  * Delete all of the calendar items in the current room, and replace them
1467  * with calendar items from a client-supplied data stream.
1468  */
1469 void ical_putics(void)
1470 {
1471         char *calstream = NULL;
1472         icalcomponent *cal;
1473         icalcomponent *c;
1474
1475         if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1476            &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1477                 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1478                 return;         /* Not a vCalendar-centric room */
1479         }
1480
1481         if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
1482                 cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
1483                 return;
1484         }
1485
1486         cprintf("%d Transmit data now\n", SEND_LISTING);
1487         calstream = CtdlReadMessageBody("000", config.c_maxmsglen, NULL, 0, 0);
1488         if (calstream == NULL) {
1489                 return;
1490         }
1491
1492         cal = icalcomponent_new_from_string(calstream);
1493         free(calstream);
1494         ical_dezonify(cal);
1495
1496         /* We got our data stream -- now do something with it. */
1497
1498         /* Delete the existing messages in the room, because we are replacing
1499          * the entire calendar with an entire new (or updated) calendar.
1500          * (Careful: this opens an S_ROOMS critical section!)
1501          */
1502         CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
1503
1504         /* If the top-level component is *not* a VCALENDAR, we can drop it right
1505          * in.  This will almost never happen.
1506          */
1507         if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
1508                 ical_write_to_cal(NULL, cal);
1509         }
1510         /*
1511          * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1512          * and other components encapsulated inside, we have to extract them.
1513          */
1514         else {
1515                 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1516                     (c != NULL);
1517                     c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1518                         ical_write_to_cal(NULL, c);
1519                 }
1520         }
1521
1522         icalcomponent_free(cal);
1523 }
1524
1525
1526 /*
1527  * All Citadel calendar commands from the client come through here.
1528  */
1529 void cmd_ical(char *argbuf)
1530 {
1531         char subcmd[64];
1532         long msgnum;
1533         char partnum[256];
1534         char action[256];
1535         char who[256];
1536
1537         extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
1538
1539         /* Allow "test" and "freebusy" subcommands without logging in. */
1540
1541         if (!strcasecmp(subcmd, "test")) {
1542                 cprintf("%d This server supports calendaring\n", CIT_OK);
1543                 return;
1544         }
1545
1546         if (!strcasecmp(subcmd, "freebusy")) {
1547                 extract_token(who, argbuf, 1, '|', sizeof who);
1548                 ical_freebusy(who);
1549                 return;
1550         }
1551
1552         if (!strcasecmp(subcmd, "sgi")) {
1553                 CIT_ICAL->server_generated_invitations =
1554                         (extract_int(argbuf, 1) ? 1 : 0) ;
1555                 cprintf("%d %d\n",
1556                         CIT_OK, CIT_ICAL->server_generated_invitations);
1557                 return;
1558         }
1559
1560         if (CtdlAccessCheck(ac_logged_in)) return;
1561
1562         if (!strcasecmp(subcmd, "respond")) {
1563                 msgnum = extract_long(argbuf, 1);
1564                 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1565                 extract_token(action, argbuf, 3, '|', sizeof action);
1566                 ical_respond(msgnum, partnum, action);
1567                 return;
1568         }
1569
1570         if (!strcasecmp(subcmd, "handle_rsvp")) {
1571                 msgnum = extract_long(argbuf, 1);
1572                 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1573                 extract_token(action, argbuf, 3, '|', sizeof action);
1574                 ical_handle_rsvp(msgnum, partnum, action);
1575                 return;
1576         }
1577
1578         if (!strcasecmp(subcmd, "conflicts")) {
1579                 msgnum = extract_long(argbuf, 1);
1580                 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1581                 ical_conflicts(msgnum, partnum);
1582                 return;
1583         }
1584
1585         if (!strcasecmp(subcmd, "getics")) {
1586                 ical_getics();
1587                 return;
1588         }
1589
1590         if (!strcasecmp(subcmd, "putics")) {
1591                 ical_putics();
1592                 return;
1593         }
1594
1595         cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
1596 }
1597
1598
1599
1600 /*
1601  * We don't know if the calendar room exists so we just create it at login
1602  */
1603 void ical_create_room(void)
1604 {
1605         struct ctdlroom qr;
1606         struct visit vbuf;
1607
1608         /* Create the calendar room if it doesn't already exist */
1609         create_room(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
1610
1611         /* Set expiration policy to manual; otherwise objects will be lost! */
1612         if (lgetroom(&qr, USERCALENDARROOM)) {
1613                 lprintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1614                 return;
1615         }
1616         qr.QRep.expire_mode = EXPIRE_MANUAL;
1617         qr.QRdefaultview = VIEW_CALENDAR;       /* 3 = calendar view */
1618         lputroom(&qr);
1619
1620         /* Set the view to a calendar view */
1621         CtdlGetRelationship(&vbuf, &CC->user, &qr);
1622         vbuf.v_view = VIEW_CALENDAR;
1623         CtdlSetRelationship(&vbuf, &CC->user, &qr);
1624
1625         /* Create the tasks list room if it doesn't already exist */
1626         create_room(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
1627
1628         /* Set expiration policy to manual; otherwise objects will be lost! */
1629         if (lgetroom(&qr, USERTASKSROOM)) {
1630                 lprintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1631                 return;
1632         }
1633         qr.QRep.expire_mode = EXPIRE_MANUAL;
1634         qr.QRdefaultview = VIEW_TASKS;
1635         lputroom(&qr);
1636
1637         /* Set the view to a task list view */
1638         CtdlGetRelationship(&vbuf, &CC->user, &qr);
1639         vbuf.v_view = VIEW_TASKS;
1640         CtdlSetRelationship(&vbuf, &CC->user, &qr);
1641
1642         /* Create the notes room if it doesn't already exist */
1643         create_room(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
1644
1645         /* Set expiration policy to manual; otherwise objects will be lost! */
1646         if (lgetroom(&qr, USERNOTESROOM)) {
1647                 lprintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1648                 return;
1649         }
1650         qr.QRep.expire_mode = EXPIRE_MANUAL;
1651         qr.QRdefaultview = VIEW_NOTES;
1652         lputroom(&qr);
1653
1654         /* Set the view to a notes view */
1655         CtdlGetRelationship(&vbuf, &CC->user, &qr);
1656         vbuf.v_view = VIEW_NOTES;
1657         CtdlSetRelationship(&vbuf, &CC->user, &qr);
1658
1659         return;
1660 }
1661
1662
1663 /*
1664  * ical_send_out_invitations() is called by ical_saving_vevent() when it
1665  * finds a VEVENT.
1666  */
1667 void ical_send_out_invitations(icalcomponent *cal) {
1668         icalcomponent *the_request = NULL;
1669         char *serialized_request = NULL;
1670         icalcomponent *encaps = NULL;
1671         char *request_message_text = NULL;
1672         struct CtdlMessage *msg = NULL;
1673         struct recptypes *valid = NULL;
1674         char attendees_string[SIZ];
1675         int num_attendees = 0;
1676         char this_attendee[256];
1677         icalproperty *attendee = NULL;
1678         char summary_string[SIZ];
1679         icalproperty *summary = NULL;
1680
1681         if (cal == NULL) {
1682                 lprintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
1683                 return;
1684         }
1685
1686
1687         /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
1688         if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1689                 ical_send_out_invitations(
1690                         icalcomponent_get_first_component(
1691                                 cal, ICAL_VEVENT_COMPONENT
1692                         )
1693                 );
1694                 return;
1695         }
1696
1697         /* Clone the event */
1698         the_request = icalcomponent_new_clone(cal);
1699         if (the_request == NULL) {
1700                 lprintf(CTDL_ERR, "ERROR: cannot clone calendar object\n");
1701                 return;
1702         }
1703
1704         /* Extract the summary string -- we'll use it as the
1705          * message subject for the request
1706          */
1707         strcpy(summary_string, "Meeting request");
1708         summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
1709         if (summary != NULL) {
1710                 if (icalproperty_get_summary(summary)) {
1711                         strcpy(summary_string,
1712                                 icalproperty_get_summary(summary) );
1713                 }
1714         }
1715
1716         /* Determine who the recipients of this message are (the attendees) */
1717         strcpy(attendees_string, "");
1718         for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
1719                 if (icalproperty_get_attendee(attendee)) {
1720                         safestrncpy(this_attendee, icalproperty_get_attendee(attendee), sizeof this_attendee);
1721                         if (!strncasecmp(this_attendee, "MAILTO:", 7)) {
1722                                 strcpy(this_attendee, &this_attendee[7]);
1723
1724                                 if (!CtdlIsMe(this_attendee, sizeof this_attendee)) {   /* don't send an invitation to myself! */
1725                                         snprintf(&attendees_string[strlen(attendees_string)],
1726                                                 sizeof(attendees_string) - strlen(attendees_string),
1727                                                 "%s, ",
1728                                                 this_attendee
1729                                         );
1730                                         ++num_attendees;
1731                                 }
1732                         }
1733                 }
1734         }
1735
1736         lprintf(CTDL_DEBUG, "<%d> attendees: <%s>\n", num_attendees, attendees_string);
1737
1738         /* If there are no attendees, there are no invitations to send, so...
1739          * don't bother putting one together!  Punch out, Maverick!
1740          */
1741         if (num_attendees == 0) {
1742                 icalcomponent_free(the_request);
1743                 return;
1744         }
1745
1746         /* Encapsulate the VEVENT component into a complete VCALENDAR */
1747         encaps = icalcomponent_new_vcalendar();
1748         if (encaps == NULL) {
1749                 lprintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1750                         __FILE__, __LINE__);
1751                 icalcomponent_free(the_request);
1752                 return;
1753         }
1754
1755         /* Set the Product ID */
1756         icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1757
1758         /* Set the Version Number */
1759         icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1760
1761         /* Set the method to REQUEST */
1762         icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
1763
1764         /* Now make sure all of the DTSTART and DTEND properties are UTC. */
1765         ical_dezonify(the_request);
1766
1767         /* Here we go: put the VEVENT into the VCALENDAR.  We now no longer
1768          * are responsible for "the_request"'s memory -- it will be freed
1769          * when we free "encaps".
1770          */
1771         icalcomponent_add_component(encaps, the_request);
1772
1773         /* Serialize it */
1774         serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1775         icalcomponent_free(encaps);     /* Don't need this anymore. */
1776         if (serialized_request == NULL) return;
1777
1778         request_message_text = malloc(strlen(serialized_request) + SIZ);
1779         if (request_message_text != NULL) {
1780                 sprintf(request_message_text,
1781                         "Content-type: text/calendar\r\n\r\n%s\r\n",
1782                         serialized_request
1783                 );
1784
1785                 msg = CtdlMakeMessage(&CC->user,
1786                         "",                     /* No single recipient here */
1787                         "",                     /* No single recipient here */
1788                         CC->room.QRname, 0, FMT_RFC822,
1789                         "",
1790                         "",
1791                         summary_string,         /* Use summary for subject */
1792                         NULL,
1793                         request_message_text);
1794
1795                 if (msg != NULL) {
1796                         valid = validate_recipients(attendees_string);
1797                         CtdlSubmitMsg(msg, valid, "");
1798                         CtdlFreeMessage(msg);
1799                         free_recipients(valid);
1800                 }
1801         }
1802         free(serialized_request);
1803 }
1804
1805
1806 /*
1807  * When a calendar object is being saved, determine whether it's a VEVENT
1808  * and the user saving it is the organizer.  If so, send out invitations
1809  * to any listed attendees.
1810  *
1811  */
1812 void ical_saving_vevent(icalcomponent *cal) {
1813         icalcomponent *c;
1814         icalproperty *organizer = NULL;
1815         char organizer_string[SIZ];
1816
1817         lprintf(CTDL_DEBUG, "ical_saving_vevent() has been called!\n");
1818
1819         /* Don't send out invitations unless the client wants us to. */
1820         if (CIT_ICAL->server_generated_invitations == 0) {
1821                 return;
1822         }
1823
1824         /* Don't send out invitations if we've been asked not to. */
1825         if (CIT_ICAL->avoid_sending_invitations > 0) {
1826                 return;
1827         }
1828
1829         strcpy(organizer_string, "");
1830         /*
1831          * The VEVENT subcomponent is the one we're interested in.
1832          * Send out invitations if, and only if, this user is the Organizer.
1833          */
1834         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
1835                 organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
1836                 if (organizer != NULL) {
1837                         if (icalproperty_get_organizer(organizer)) {
1838                                 strcpy(organizer_string,
1839                                         icalproperty_get_organizer(organizer));
1840                         }
1841                 }
1842                 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
1843                         strcpy(organizer_string, &organizer_string[7]);
1844                         striplt(organizer_string);
1845                         /*
1846                          * If the user saving the event is listed as the
1847                          * organizer, then send out invitations.
1848                          */
1849                         if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
1850                                 ical_send_out_invitations(cal);
1851                         }
1852                 }
1853         }
1854
1855         /* If the component has subcomponents, recurse through them. */
1856         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1857             (c != NULL);
1858             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1859                 /* Recursively process subcomponent */
1860                 ical_saving_vevent(c);
1861         }
1862
1863 }
1864
1865
1866
1867 /*
1868  * Back end for ical_obj_beforesave()
1869  * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
1870  * the summary of the event (becomes message subject),
1871  * and the start time (becomes message date/time).
1872  */
1873 void ical_ctdl_set_exclusive_msgid(char *name, char *filename, char *partnum,
1874                 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
1875                 char *encoding, void *cbuserdata)
1876 {
1877         icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
1878         icalproperty *p;
1879         struct icalmessagemod *imm;
1880         char new_uid[SIZ];
1881
1882         imm = (struct icalmessagemod *)cbuserdata;
1883
1884         /* We're only interested in calendar data. */
1885         if (strcasecmp(cbtype, "text/calendar")) {
1886                 return;
1887         }
1888
1889         /* Hunt for the UID and drop it in
1890          * the "user data" pointer for the MIME parser.  When
1891          * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
1892          * to that string.
1893          */
1894         whole_cal = icalcomponent_new_from_string(content);
1895         cal = whole_cal;
1896         if (cal != NULL) {
1897                 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1898                         nested_event = icalcomponent_get_first_component(
1899                                 cal, ICAL_VEVENT_COMPONENT);
1900                         if (nested_event != NULL) {
1901                                 cal = nested_event;
1902                         }
1903                         else {
1904                                 nested_todo = icalcomponent_get_first_component(
1905                                         cal, ICAL_VTODO_COMPONENT);
1906                                 if (nested_todo != NULL) {
1907                                         cal = nested_todo;
1908                                 }
1909                         }
1910                 }
1911
1912                 if (cal != NULL) {
1913                         p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
1914                         if (p == NULL) {
1915                                 /* If there's no uid we must generate one */
1916                                 generate_uuid(new_uid);
1917                                 icalcomponent_add_property(cal, icalproperty_new_uid(new_uid));
1918                                 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
1919                         }
1920                         if (p != NULL) {
1921                                 strcpy(imm->uid, icalproperty_get_comment(p));
1922                         }
1923                         p = ical_ctdl_get_subprop(cal, ICAL_SUMMARY_PROPERTY);
1924                         if (p != NULL) {
1925                                 strcpy(imm->subject, icalproperty_get_comment(p));
1926                         }
1927                         p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
1928                         if (p != NULL) {
1929                                 imm->dtstart = icaltime_as_timet(icalproperty_get_dtstart(p));
1930                         }
1931                 }
1932                 icalcomponent_free(cal);
1933                 if (whole_cal != cal) {
1934                         icalcomponent_free(whole_cal);
1935                 }
1936         }
1937 }
1938
1939
1940
1941
1942 /*
1943  * See if we need to prevent the object from being saved (we don't allow
1944  * MIME types other than text/calendar in "calendar" or "tasks"  rooms).  Also,
1945  * when saving an event to the calendar, set the message's Citadel exclusive
1946  * message ID to the UID of the object.  This causes our replication checker to
1947  * automatically delete any existing instances of the same object.  (Isn't
1948  * that cool?)
1949  *
1950  * We also set the message's Subject to the event summary, and the Date/time to
1951  * the event start time.
1952  */
1953 int ical_obj_beforesave(struct CtdlMessage *msg)
1954 {
1955         struct icalmessagemod imm;
1956
1957         /* First determine if this is a calendar or tasks room */
1958         if (  (CC->room.QRdefaultview != VIEW_CALENDAR)
1959            && (CC->room.QRdefaultview != VIEW_TASKS)
1960         ) {
1961                 return(0);              /* Not a vCalendar-centric room */
1962         }
1963
1964         /* It must be an RFC822 message! */
1965         if (msg->cm_format_type != 4) {
1966                 lprintf(CTDL_DEBUG, "Rejecting non-RFC822 message\n");
1967                 return(1);              /* You tried to save a non-RFC822 message! */
1968         }
1969
1970         if (msg->cm_fields['M'] == NULL) {
1971                 return(1);              /* You tried to save a null message! */
1972         }
1973
1974         memset(&imm, 0, sizeof(struct icalmessagemod));
1975
1976         /* Do all of our lovely back-end parsing */
1977         mime_parser(msg->cm_fields['M'],
1978                 NULL,
1979                 *ical_ctdl_set_exclusive_msgid,
1980                 NULL, NULL,
1981                 (void *)&imm,
1982                 0
1983         );
1984
1985         if (!IsEmptyStr(imm.uid)) {
1986                 if (msg->cm_fields['E'] != NULL) {
1987                         free(msg->cm_fields['E']);
1988                 }
1989                 msg->cm_fields['E'] = strdup(imm.uid);
1990                 lprintf(CTDL_DEBUG, "Saving calendar UID <%s>\n", msg->cm_fields['E']);
1991         }
1992         if (!IsEmptyStr(imm.subject)) {
1993                 if (msg->cm_fields['U'] != NULL) {
1994                         free(msg->cm_fields['U']);
1995                 }
1996                 msg->cm_fields['U'] = strdup(imm.subject);
1997         }
1998         if (imm.dtstart > 0) {
1999                 if (msg->cm_fields['T'] != NULL) {
2000                         free(msg->cm_fields['T']);
2001                 }
2002                 msg->cm_fields['T'] = strdup("000000000000000000");
2003                 sprintf(msg->cm_fields['T'], "%ld", imm.dtstart);
2004         }
2005
2006         return(0);
2007 }
2008
2009
2010 /*
2011  * Things we need to do after saving a calendar event.
2012  */
2013 void ical_obj_aftersave_backend(char *name, char *filename, char *partnum,
2014                 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2015                 char *encoding, void *cbuserdata)
2016 {
2017         icalcomponent *cal;
2018
2019         /* We're only interested in calendar items here. */
2020         if (strcasecmp(cbtype, "text/calendar")) {
2021                 return;
2022         }
2023
2024         /* Hunt for the UID and drop it in
2025          * the "user data" pointer for the MIME parser.  When
2026          * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2027          * to that string.
2028          */
2029         if (!strcasecmp(cbtype, "text/calendar")) {
2030                 cal = icalcomponent_new_from_string(content);
2031                 if (cal != NULL) {
2032                         ical_saving_vevent(cal);
2033                         icalcomponent_free(cal);
2034                 }
2035         }
2036 }
2037
2038
2039 /*
2040  * Things we need to do after saving a calendar event.
2041  * (This will start back end tasks such as automatic generation of invitations,
2042  * if such actions are appropriate.)
2043  */
2044 int ical_obj_aftersave(struct CtdlMessage *msg)
2045 {
2046         char roomname[ROOMNAMELEN];
2047
2048         /*
2049          * If this isn't the Calendar> room, no further action is necessary.
2050          */
2051
2052         /* First determine if this is our room */
2053         MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
2054         if (strcasecmp(roomname, CC->room.QRname)) {
2055                 return(0);      /* Not the Calendar room -- don't do anything. */
2056         }
2057
2058         /* It must be an RFC822 message! */
2059         if (msg->cm_format_type != 4) return(1);
2060
2061         /* Reject null messages */
2062         if (msg->cm_fields['M'] == NULL) return(1);
2063
2064         /* Now recurse through it looking for our icalendar data */
2065         mime_parser(msg->cm_fields['M'],
2066                 NULL,
2067                 *ical_obj_aftersave_backend,
2068                 NULL, NULL,
2069                 NULL,
2070                 0
2071         );
2072
2073         return(0);
2074 }
2075
2076
2077 void ical_session_startup(void) {
2078         CIT_ICAL = malloc(sizeof(struct cit_ical));
2079         memset(CIT_ICAL, 0, sizeof(struct cit_ical));
2080 }
2081
2082 void ical_session_shutdown(void) {
2083         free(CIT_ICAL);
2084 }
2085
2086
2087 /*
2088  * Back end for ical_fixed_output()
2089  */
2090 void ical_fixed_output_backend(icalcomponent *cal,
2091                         int recursion_level
2092 ) {
2093         icalcomponent *c;
2094         icalproperty *p;
2095         char buf[256];
2096
2097         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
2098         if (p != NULL) {
2099                 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2100         }
2101
2102         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
2103         if (p != NULL) {
2104                 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2105         }
2106
2107         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
2108         if (p != NULL) {
2109                 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2110         }
2111
2112         /* If the component has attendees, iterate through them. */
2113         for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
2114                 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
2115                 if (!strncasecmp(buf, "MAILTO:", 7)) {
2116
2117                         /* screen name or email address */
2118                         strcpy(buf, &buf[7]);
2119                         striplt(buf);
2120                         cprintf("%s ", buf);
2121                 }
2122                 cprintf("\n");
2123         }
2124
2125         /* If the component has subcomponents, recurse through them. */
2126         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2127             (c != 0);
2128             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2129                 /* Recursively process subcomponent */
2130                 ical_fixed_output_backend(c, recursion_level+1);
2131         }
2132 }
2133
2134
2135
2136 /*
2137  * Function to output vcalendar data as plain text.  Nobody uses MSG0
2138  * anymore, so really this is just so we expose the vCard data to the full
2139  * text indexer.
2140  */
2141 void ical_fixed_output(char *ptr, int len) {
2142         icalcomponent *cal;
2143         char *stringy_cal;
2144
2145         stringy_cal = malloc(len + 1);
2146         safestrncpy(stringy_cal, ptr, len + 1);
2147         cal = icalcomponent_new_from_string(stringy_cal);
2148         free(stringy_cal);
2149
2150         if (cal == NULL) {
2151                 return;
2152         }
2153
2154         ical_dezonify(cal);
2155         ical_fixed_output_backend(cal, 0);
2156
2157         /* Free the memory we obtained from libical's constructor */
2158         icalcomponent_free(cal);
2159 }
2160
2161
2162 #endif  /* CITADEL_WITH_CALENDAR_SERVICE */
2163
2164 /*
2165  * Register this module with the Citadel server.
2166  */
2167 CTDL_MODULE_INIT(calendar)
2168 {
2169 #ifdef CITADEL_WITH_CALENDAR_SERVICE
2170         CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
2171         CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
2172         CtdlRegisterSessionHook(ical_create_room, EVT_LOGIN);
2173         CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCal commands");
2174         CtdlRegisterSessionHook(ical_session_startup, EVT_START);
2175         CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP);
2176         CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
2177 #endif
2178
2179         /* return our Subversion id for the Log */
2180         return "$Id$";
2181 }
2182
2183
2184
2185 void serv_calendar_destroy(void)
2186 {
2187 #ifdef CITADEL_WITH_CALENDAR_SERVICE
2188         icaltimezone_free_builtin_timezones();
2189 #endif
2190 }