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