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