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.
10 #define PRODID "-//Citadel//NONSGML Citadel Calendar//EN"
15 #include <sys/types.h>
23 #include <libcitadel.h>
26 #include "citserver.h"
32 #include "internet_addressing.h"
33 #include "serv_calendar.h"
34 #include "euidindex.h"
35 #include "ctdl_module.h"
36 #include "ical_dezonify.h"
40 struct ical_respond_data {
41 char desired_partnum[SIZ];
47 * Utility function to create a new VCALENDAR component with some of the
48 * required fields already set the way we like them.
50 icalcomponent *icalcomponent_new_citadel_vcalendar(void) {
51 icalcomponent *encaps;
53 encaps = icalcomponent_new_vcalendar();
55 lprintf(CTDL_CRIT, "Error at %s:%d - could not allocate component!\n",
60 /* Set the Product ID */
61 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
63 /* Set the Version Number */
64 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
71 * Utility function to encapsulate a subcomponent into a full VCALENDAR
73 icalcomponent *ical_encapsulate_subcomponent(icalcomponent *subcomp) {
74 icalcomponent *encaps;
76 /* If we're already looking at a full VCALENDAR component,
77 * don't bother ... just return itself.
79 if (icalcomponent_isa(subcomp) == ICAL_VCALENDAR_COMPONENT) {
83 /* Encapsulate the VEVENT component into a complete VCALENDAR */
84 encaps = icalcomponent_new_citadel_vcalendar();
85 if (encaps == NULL) return NULL;
87 /* Encapsulate the subcomponent inside */
88 icalcomponent_add_component(encaps, subcomp);
90 /* Convert all timestamps to UTC so we don't have to deal with
91 * stupid VTIMEZONE crap.
93 ical_dezonify(encaps);
95 /* Return the object we just created. */
103 * Write a calendar object into the specified user's calendar room.
104 * If the supplied user is NULL, this function writes the calendar object
105 * to the currently selected room.
107 void ical_write_to_cal(struct ctdluser *u, icalcomponent *cal) {
111 icalcomponent *encaps = NULL;
112 struct CtdlMessage *msg = NULL;
113 icalcomponent *tmp=NULL;
115 if (cal == NULL) return;
117 /* If the supplied object is a subcomponent, encapsulate it in
118 * a full VCALENDAR component, and save that instead.
120 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
121 tmp = icalcomponent_new_clone(cal);
122 encaps = ical_encapsulate_subcomponent(tmp);
123 ical_write_to_cal(u, encaps);
124 icalcomponent_free(tmp);
125 icalcomponent_free(encaps);
129 ser = icalcomponent_as_ical_string(cal);
130 if (ser == NULL) return;
132 /* If the caller supplied a user, write to that user's default calendar room */
134 /* Make a temp file out of it */
135 CtdlMakeTempFileName(temp, sizeof temp);
136 fp = fopen(temp, "w");
138 fwrite(ser, strlen(ser), 1, fp);
141 /* This handy API function does all the work for us. */
142 CtdlWriteObject(USERCALENDARROOM, /* which room */
143 "text/calendar", /* MIME type */
144 temp, /* temp file */
147 0, /* don't delete others of this type */
154 /* If the caller did not supply a user, write to the currently selected room */
156 msg = malloc(sizeof(struct CtdlMessage));
157 memset(msg, 0, sizeof(struct CtdlMessage));
158 msg->cm_magic = CTDLMESSAGE_MAGIC;
159 msg->cm_anon_type = MES_NORMAL;
160 msg->cm_format_type = 4;
161 msg->cm_fields['A'] = strdup(CC->user.fullname);
162 msg->cm_fields['O'] = strdup(CC->room.QRname);
163 msg->cm_fields['N'] = strdup(config.c_nodename);
164 msg->cm_fields['H'] = strdup(config.c_humannode);
165 msg->cm_fields['M'] = malloc(strlen(ser) + 40);
166 strcpy(msg->cm_fields['M'], "Content-type: text/calendar\r\n\r\n");
167 strcat(msg->cm_fields['M'], ser);
169 /* Now write the data */
170 CtdlSubmitMsg(msg, NULL, "");
171 CtdlFreeMessage(msg);
174 /* In either case, now we can free the serialized calendar object */
180 * Add a calendar object to the user's calendar
182 * ok because it uses ical_write_to_cal()
184 void ical_add(icalcomponent *cal, int recursion_level) {
188 * The VEVENT subcomponent is the one we're interested in saving.
190 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
192 ical_write_to_cal(&CC->user, cal);
196 /* If the component has subcomponents, recurse through them. */
197 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
199 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
200 /* Recursively process subcomponent */
201 ical_add(c, recursion_level+1);
209 * Send a reply to a meeting invitation.
211 * 'request' is the invitation to reply to.
212 * 'action' is the string "accept" or "decline" or "tentative".
215 void ical_send_a_reply(icalcomponent *request, char *action) {
216 icalcomponent *the_reply = NULL;
217 icalcomponent *vevent = NULL;
218 icalproperty *attendee = NULL;
219 char attendee_string[SIZ];
220 icalproperty *organizer = NULL;
221 char organizer_string[SIZ];
222 icalproperty *summary = NULL;
223 char summary_string[SIZ];
224 icalproperty *me_attend = NULL;
225 struct recptypes *recp = NULL;
226 icalparameter *partstat = NULL;
227 char *serialized_reply = NULL;
228 char *reply_message_text = NULL;
229 struct CtdlMessage *msg = NULL;
230 struct recptypes *valid = NULL;
232 strcpy(organizer_string, "");
233 strcpy(summary_string, "Calendar item");
235 if (request == NULL) {
236 lprintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
240 the_reply = icalcomponent_new_clone(request);
241 if (the_reply == NULL) {
242 lprintf(CTDL_ERR, "ERROR: cannot clone request\n");
246 /* Change the method from REQUEST to REPLY */
247 icalcomponent_set_method(the_reply, ICAL_METHOD_REPLY);
249 vevent = icalcomponent_get_first_component(the_reply, ICAL_VEVENT_COMPONENT);
250 if (vevent != NULL) {
251 /* Hunt for attendees, removing ones that aren't us.
252 * (Actually, remove them all, cloning our own one so we can
253 * re-insert it later)
255 while (attendee = icalcomponent_get_first_property(vevent,
256 ICAL_ATTENDEE_PROPERTY), (attendee != NULL)
258 if (icalproperty_get_attendee(attendee)) {
259 strcpy(attendee_string,
260 icalproperty_get_attendee(attendee) );
261 if (!strncasecmp(attendee_string, "MAILTO:", 7)) {
262 strcpy(attendee_string, &attendee_string[7]);
263 striplt(attendee_string);
264 recp = validate_recipients(attendee_string, NULL, 0);
266 if (!strcasecmp(recp->recp_local, CC->user.fullname)) {
267 if (me_attend) icalproperty_free(me_attend);
268 me_attend = icalproperty_new_clone(attendee);
270 free_recipients(recp);
275 icalcomponent_remove_property(vevent, attendee);
276 icalproperty_free(attendee);
279 /* We found our own address in the attendee list. */
281 /* Change the partstat from NEEDS-ACTION to ACCEPT or DECLINE */
282 icalproperty_remove_parameter(me_attend, ICAL_PARTSTAT_PARAMETER);
284 if (!strcasecmp(action, "accept")) {
285 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_ACCEPTED);
287 else if (!strcasecmp(action, "decline")) {
288 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_DECLINED);
290 else if (!strcasecmp(action, "tentative")) {
291 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE);
294 if (partstat) icalproperty_add_parameter(me_attend, partstat);
296 /* Now insert it back into the vevent. */
297 icalcomponent_add_property(vevent, me_attend);
300 /* Figure out who to send this thing to */
301 organizer = icalcomponent_get_first_property(vevent, ICAL_ORGANIZER_PROPERTY);
302 if (organizer != NULL) {
303 if (icalproperty_get_organizer(organizer)) {
304 strcpy(organizer_string,
305 icalproperty_get_organizer(organizer) );
308 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
309 strcpy(organizer_string, &organizer_string[7]);
310 striplt(organizer_string);
312 strcpy(organizer_string, "");
315 /* Extract the summary string -- we'll use it as the
316 * message subject for the reply
318 summary = icalcomponent_get_first_property(vevent, ICAL_SUMMARY_PROPERTY);
319 if (summary != NULL) {
320 if (icalproperty_get_summary(summary)) {
321 strcpy(summary_string,
322 icalproperty_get_summary(summary) );
327 /* Now generate the reply message and send it out. */
328 serialized_reply = strdup(icalcomponent_as_ical_string(the_reply));
329 icalcomponent_free(the_reply); /* don't need this anymore */
330 if (serialized_reply == NULL) return;
332 reply_message_text = malloc(strlen(serialized_reply) + SIZ);
333 if (reply_message_text != NULL) {
334 sprintf(reply_message_text,
335 "Content-type: text/calendar charset=\"utf-8\"\r\n\r\n%s\r\n",
339 msg = CtdlMakeMessage(&CC->user,
340 organizer_string, /* to */
342 CC->room.QRname, 0, FMT_RFC822,
345 summary_string, /* Use summary for subject */
350 valid = validate_recipients(organizer_string, NULL, 0);
351 CtdlSubmitMsg(msg, valid, "");
352 CtdlFreeMessage(msg);
353 free_recipients(valid);
356 free(serialized_reply);
362 * Callback function for mime parser that hunts for calendar content types
363 * and turns them into calendar objects
365 void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
366 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
369 struct ical_respond_data *ird = NULL;
371 ird = (struct ical_respond_data *) cbuserdata;
373 /* desired_partnum can be set to "_HUNT_" to have it just look for
374 * the first part with a content type of text/calendar. Otherwise
375 * we have to only process the right one.
377 if (strcasecmp(ird->desired_partnum, "_HUNT_")) {
378 if (strcasecmp(partnum, ird->desired_partnum)) {
383 if ( (strcasecmp(cbtype, "text/calendar"))
384 && (strcasecmp(cbtype, "application/ics")) ) {
388 if (ird->cal != NULL) {
389 icalcomponent_free(ird->cal);
393 ird->cal = icalcomponent_new_from_string(content);
394 if (ird->cal != NULL) {
395 ical_dezonify(ird->cal);
401 * Respond to a meeting request.
403 void ical_respond(long msgnum, char *partnum, char *action) {
404 struct CtdlMessage *msg = NULL;
405 struct ical_respond_data ird;
408 (strcasecmp(action, "accept"))
409 && (strcasecmp(action, "decline"))
411 cprintf("%d Action must be 'accept' or 'decline'\n",
412 ERROR + ILLEGAL_VALUE
417 msg = CtdlFetchMessage(msgnum, 1);
419 cprintf("%d Message %ld not found.\n",
420 ERROR + ILLEGAL_VALUE,
426 memset(&ird, 0, sizeof ird);
427 strcpy(ird.desired_partnum, partnum);
428 mime_parser(msg->cm_fields['M'],
430 *ical_locate_part, /* callback function */
432 (void *) &ird, /* user data */
436 /* We're done with the incoming message, because we now have a
437 * calendar object in memory.
439 CtdlFreeMessage(msg);
442 * Here is the real meat of this function. Handle the event.
444 if (ird.cal != NULL) {
445 /* Save this in the user's calendar if necessary */
446 if (!strcasecmp(action, "accept")) {
447 ical_add(ird.cal, 0);
450 /* Send a reply if necessary */
451 if (icalcomponent_get_method(ird.cal) == ICAL_METHOD_REQUEST) {
452 ical_send_a_reply(ird.cal, action);
455 /* Now that we've processed this message, we don't need it
456 * anymore. So delete it. (NOTE we don't do this anymore.)
457 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
460 /* Free the memory we allocated and return a response. */
461 icalcomponent_free(ird.cal);
463 cprintf("%d ok\n", CIT_OK);
467 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
471 /* should never get here */
476 * Figure out the UID of the calendar event being referred to in a
477 * REPLY object. This function is recursive.
479 void ical_learn_uid_of_reply(char *uidbuf, icalcomponent *cal) {
480 icalcomponent *subcomponent;
483 /* If this object is a REPLY, then extract the UID. */
484 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
485 p = icalcomponent_get_first_property(cal, ICAL_UID_PROPERTY);
487 strcpy(uidbuf, icalproperty_get_comment(p));
491 /* Otherwise, recurse through any VEVENT subcomponents. We do NOT want the
492 * UID of the reply; we want the UID of the invitation being replied to.
494 for (subcomponent = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
495 subcomponent != NULL;
496 subcomponent = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT) ) {
497 ical_learn_uid_of_reply(uidbuf, subcomponent);
503 * ical_update_my_calendar_with_reply() refers to this callback function; when we
504 * locate the message containing the calendar event we're replying to, this function
505 * gets called. It basically just sticks the message number in a supplied buffer.
507 void ical_hunt_for_event_to_update(long msgnum, void *data) {
510 msgnumptr = (long *) data;
515 struct original_event_container {
520 * Callback function for mime parser that hunts for calendar content types
521 * and turns them into calendar objects (called by ical_update_my_calendar_with_reply()
522 * to fetch the object being updated)
524 void ical_locate_original_event(char *name, char *filename, char *partnum, char *disp,
525 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
528 struct original_event_container *oec = NULL;
530 if ( (strcasecmp(cbtype, "text/calendar"))
531 && (strcasecmp(cbtype, "application/ics")) ) {
534 oec = (struct original_event_container *) cbuserdata;
535 if (oec->c != NULL) {
536 icalcomponent_free(oec->c);
538 oec->c = icalcomponent_new_from_string(content);
543 * Merge updated attendee information from a REPLY into an existing event.
545 void ical_merge_attendee_reply(icalcomponent *event, icalcomponent *reply) {
547 icalproperty *e_attendee, *r_attendee;
549 /* First things first. If we're not looking at a VEVENT component,
550 * recurse through subcomponents until we find one.
552 if (icalcomponent_isa(event) != ICAL_VEVENT_COMPONENT) {
553 for (c = icalcomponent_get_first_component(event, ICAL_VEVENT_COMPONENT);
555 c = icalcomponent_get_next_component(event, ICAL_VEVENT_COMPONENT) ) {
556 ical_merge_attendee_reply(c, reply);
561 /* Now do the same thing with the reply.
563 if (icalcomponent_isa(reply) != ICAL_VEVENT_COMPONENT) {
564 for (c = icalcomponent_get_first_component(reply, ICAL_VEVENT_COMPONENT);
566 c = icalcomponent_get_next_component(reply, ICAL_VEVENT_COMPONENT) ) {
567 ical_merge_attendee_reply(event, c);
572 /* Clone the reply, because we're going to rip its guts out. */
573 reply = icalcomponent_new_clone(reply);
575 /* At this point we're looking at the correct subcomponents.
576 * Iterate through the attendees looking for a match.
579 for (e_attendee = icalcomponent_get_first_property(event, ICAL_ATTENDEE_PROPERTY);
581 e_attendee = icalcomponent_get_next_property(event, ICAL_ATTENDEE_PROPERTY)) {
583 for (r_attendee = icalcomponent_get_first_property(reply, ICAL_ATTENDEE_PROPERTY);
585 r_attendee = icalcomponent_get_next_property(reply, ICAL_ATTENDEE_PROPERTY)) {
587 /* Check to see if these two attendees match...
590 icalproperty_get_attendee(e_attendee),
591 icalproperty_get_attendee(r_attendee)
593 /* ...and if they do, remove the attendee from the event
594 * and replace it with the attendee from the reply. (The
595 * reply's copy will have the same address, but an updated
598 icalcomponent_remove_property(event, e_attendee);
599 icalproperty_free(e_attendee);
600 icalcomponent_remove_property(reply, r_attendee);
601 icalcomponent_add_property(event, r_attendee);
603 /* Since we diddled both sets of attendees, we have to start
604 * the iteration over again. This will not create an infinite
605 * loop because we removed the attendee from the reply. (That's
606 * why we cloned the reply, and that's what we mean by "ripping
615 /* Free the *clone* of the reply. */
616 icalcomponent_free(reply);
623 * Handle an incoming RSVP (object with method==ICAL_METHOD_REPLY) for a
624 * calendar event. The object has already been deserialized for us; all
625 * we have to do here is hunt for the event in our calendar, merge in the
626 * updated attendee status, and save it again.
628 * This function returns 0 on success, 1 if the event was not found in the
629 * user's calendar, or 2 if an internal error occurred.
631 int ical_update_my_calendar_with_reply(icalcomponent *cal) {
633 char hold_rm[ROOMNAMELEN];
634 long msgnum_being_replaced = 0;
635 struct CtdlMessage *msg = NULL;
636 struct original_event_container oec;
637 icalcomponent *original_event;
638 char *serialized_event = NULL;
639 char roomname[ROOMNAMELEN];
640 char *message_text = NULL;
642 /* Figure out just what event it is we're dealing with */
643 strcpy(uid, "--==<< InVaLiD uId >>==--");
644 ical_learn_uid_of_reply(uid, cal);
645 lprintf(CTDL_DEBUG, "UID of event being replied to is <%s>\n", uid);
647 strcpy(hold_rm, CC->room.QRname); /* save current room */
649 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
650 getroom(&CC->room, hold_rm);
651 lprintf(CTDL_CRIT, "cannot get user calendar room\n");
656 * Look in the EUID index for a message with
657 * the Citadel EUID set to the value we're looking for. Since
658 * Citadel always sets the message EUID to the vCalendar UID of
659 * the event, this will work.
661 msgnum_being_replaced = locate_message_by_euid(uid, &CC->room);
663 getroom(&CC->room, hold_rm); /* return to saved room */
665 lprintf(CTDL_DEBUG, "msgnum_being_replaced == %ld\n", msgnum_being_replaced);
666 if (msgnum_being_replaced == 0) {
667 return(1); /* no calendar event found */
670 /* Now we know the ID of the message containing the event being updated.
671 * We don't actually have to delete it; that'll get taken care of by the
672 * server when we save another event with the same UID. This just gives
673 * us the ability to load the event into memory so we can diddle the
676 msg = CtdlFetchMessage(msgnum_being_replaced, 1);
678 return(2); /* internal error */
681 mime_parser(msg->cm_fields['M'],
683 *ical_locate_original_event, /* callback function */
685 &oec, /* user data */
688 CtdlFreeMessage(msg);
690 original_event = oec.c;
691 if (original_event == NULL) {
692 lprintf(CTDL_ERR, "ERROR: Original_component is NULL.\n");
696 /* Merge the attendee's updated status into the event */
697 ical_merge_attendee_reply(original_event, cal);
700 serialized_event = strdup(icalcomponent_as_ical_string(original_event));
701 icalcomponent_free(original_event); /* Don't need this anymore. */
702 if (serialized_event == NULL) return(2);
704 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
706 message_text = malloc(strlen(serialized_event) + SIZ);
707 if (message_text != NULL) {
708 sprintf(message_text,
709 "Content-type: text/calendar charset=\"utf-8\"\r\n\r\n%s\r\n",
713 msg = CtdlMakeMessage(&CC->user,
714 "", /* No recipient */
715 "", /* No recipient */
725 CIT_ICAL->avoid_sending_invitations = 1;
726 CtdlSubmitMsg(msg, NULL, roomname);
727 CtdlFreeMessage(msg);
728 CIT_ICAL->avoid_sending_invitations = 0;
731 free(serialized_event);
737 * Handle an incoming RSVP for an event. (This is the server subcommand part; it
738 * simply extracts the calendar object from the message, deserializes it, and
739 * passes it up to ical_update_my_calendar_with_reply() for processing.
741 void ical_handle_rsvp(long msgnum, char *partnum, char *action) {
742 struct CtdlMessage *msg = NULL;
743 struct ical_respond_data ird;
747 (strcasecmp(action, "update"))
748 && (strcasecmp(action, "ignore"))
750 cprintf("%d Action must be 'update' or 'ignore'\n",
751 ERROR + ILLEGAL_VALUE
756 msg = CtdlFetchMessage(msgnum, 1);
758 cprintf("%d Message %ld not found.\n",
759 ERROR + ILLEGAL_VALUE,
765 memset(&ird, 0, sizeof ird);
766 strcpy(ird.desired_partnum, partnum);
767 mime_parser(msg->cm_fields['M'],
769 *ical_locate_part, /* callback function */
771 (void *) &ird, /* user data */
775 /* We're done with the incoming message, because we now have a
776 * calendar object in memory.
778 CtdlFreeMessage(msg);
781 * Here is the real meat of this function. Handle the event.
783 if (ird.cal != NULL) {
784 /* Update the user's calendar if necessary */
785 if (!strcasecmp(action, "update")) {
786 ret = ical_update_my_calendar_with_reply(ird.cal);
788 cprintf("%d Your calendar has been updated with this reply.\n",
792 cprintf("%d This event does not exist in your calendar.\n",
793 ERROR + FILE_NOT_FOUND);
796 cprintf("%d An internal error occurred.\n",
797 ERROR + INTERNAL_ERROR);
801 cprintf("%d This reply has been ignored.\n", CIT_OK);
804 /* Now that we've processed this message, we don't need it
805 * anymore. So delete it. (Don't do this anymore.)
806 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
809 /* Free the memory we allocated and return a response. */
810 icalcomponent_free(ird.cal);
815 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
819 /* should never get here */
824 * Search for a property in both the top level and in a VEVENT subcomponent
826 icalproperty *ical_ctdl_get_subprop(
828 icalproperty_kind which_prop
833 p = icalcomponent_get_first_property(cal, which_prop);
835 c = icalcomponent_get_first_component(cal,
836 ICAL_VEVENT_COMPONENT);
838 p = icalcomponent_get_first_property(c, which_prop);
846 * Check to see if two events overlap. Returns nonzero if they do.
847 * (This function is used in both Citadel and WebCit. If you change it in
848 * one place, change it in the other. Better yet, put it in a library.)
850 int ical_ctdl_is_overlap(
851 struct icaltimetype t1start,
852 struct icaltimetype t1end,
853 struct icaltimetype t2start,
854 struct icaltimetype t2end
857 if (icaltime_is_null_time(t1start)) return(0);
858 if (icaltime_is_null_time(t2start)) return(0);
860 /* First, check for all-day events */
861 if (t1start.is_date) {
862 if (!icaltime_compare_date_only(t1start, t2start)) {
865 if (!icaltime_is_null_time(t2end)) {
866 if (!icaltime_compare_date_only(t1start, t2end)) {
872 if (t2start.is_date) {
873 if (!icaltime_compare_date_only(t2start, t1start)) {
876 if (!icaltime_is_null_time(t1end)) {
877 if (!icaltime_compare_date_only(t2start, t1end)) {
883 /* Now check for overlaps using date *and* time. */
885 /* First, bail out if either event 1 or event 2 is missing end time. */
886 if (icaltime_is_null_time(t1end)) return(0);
887 if (icaltime_is_null_time(t2end)) return(0);
889 /* If event 1 ends before event 2 starts, we're in the clear. */
890 if (icaltime_compare(t1end, t2start) <= 0) return(0);
892 /* If event 2 ends before event 1 starts, we're also ok. */
893 if (icaltime_compare(t2end, t1start) <= 0) return(0);
895 /* Otherwise, they overlap. */
902 * Backend for ical_hunt_for_conflicts()
904 void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
906 struct CtdlMessage *msg = NULL;
907 struct ical_respond_data ird;
908 struct icaltimetype t1start, t1end, t2start, t2end;
910 char conflict_event_uid[SIZ];
911 char conflict_event_summary[SIZ];
912 char compare_uid[SIZ];
914 cal = (icalcomponent *)data;
915 strcpy(compare_uid, "");
916 strcpy(conflict_event_uid, "");
917 strcpy(conflict_event_summary, "");
919 msg = CtdlFetchMessage(msgnum, 1);
920 if (msg == NULL) return;
921 memset(&ird, 0, sizeof ird);
922 strcpy(ird.desired_partnum, "_HUNT_");
923 mime_parser(msg->cm_fields['M'],
925 *ical_locate_part, /* callback function */
927 (void *) &ird, /* user data */
930 CtdlFreeMessage(msg);
932 if (ird.cal == NULL) return;
934 t1start = icaltime_null_time();
935 t1end = icaltime_null_time();
936 t2start = icaltime_null_time();
937 t1end = icaltime_null_time();
939 /* Now compare cal to ird.cal */
940 p = ical_ctdl_get_subprop(ird.cal, ICAL_DTSTART_PROPERTY);
941 if (p == NULL) return;
942 if (p != NULL) t2start = icalproperty_get_dtstart(p);
944 p = ical_ctdl_get_subprop(ird.cal, ICAL_DTEND_PROPERTY);
945 if (p != NULL) t2end = icalproperty_get_dtend(p);
947 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
948 if (p == NULL) return;
949 if (p != NULL) t1start = icalproperty_get_dtstart(p);
951 p = ical_ctdl_get_subprop(cal, ICAL_DTEND_PROPERTY);
952 if (p != NULL) t1end = icalproperty_get_dtend(p);
954 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
956 strcpy(compare_uid, icalproperty_get_comment(p));
959 p = ical_ctdl_get_subprop(ird.cal, ICAL_UID_PROPERTY);
961 strcpy(conflict_event_uid, icalproperty_get_comment(p));
964 p = ical_ctdl_get_subprop(ird.cal, ICAL_SUMMARY_PROPERTY);
966 strcpy(conflict_event_summary, icalproperty_get_comment(p));
969 icalcomponent_free(ird.cal);
971 if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
972 cprintf("%ld||%s|%s|%d|\n",
975 conflict_event_summary,
976 ( ((strlen(compare_uid)>0)
977 &&(!strcasecmp(compare_uid,
978 conflict_event_uid))) ? 1 : 0
987 * Phase 2 of "hunt for conflicts" operation.
988 * At this point we have a calendar object which represents the VEVENT that
989 * we're considering adding to the calendar. Now hunt through the user's
990 * calendar room, and output zero or more existing VEVENTs which conflict
993 void ical_hunt_for_conflicts(icalcomponent *cal) {
994 char hold_rm[ROOMNAMELEN];
996 strcpy(hold_rm, CC->room.QRname); /* save current room */
998 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
999 getroom(&CC->room, hold_rm);
1000 cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
1004 cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
1006 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1009 ical_hunt_for_conflicts_backend,
1014 getroom(&CC->room, hold_rm); /* return to saved room */
1021 * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
1023 void ical_conflicts(long msgnum, char *partnum) {
1024 struct CtdlMessage *msg = NULL;
1025 struct ical_respond_data ird;
1027 msg = CtdlFetchMessage(msgnum, 1);
1029 cprintf("%d Message %ld not found.\n",
1030 ERROR + ILLEGAL_VALUE,
1036 memset(&ird, 0, sizeof ird);
1037 strcpy(ird.desired_partnum, partnum);
1038 mime_parser(msg->cm_fields['M'],
1040 *ical_locate_part, /* callback function */
1042 (void *) &ird, /* user data */
1046 CtdlFreeMessage(msg);
1048 if (ird.cal != NULL) {
1049 ical_hunt_for_conflicts(ird.cal);
1050 icalcomponent_free(ird.cal);
1054 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
1058 /* should never get here */
1064 * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
1066 void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *cal) {
1069 struct icalperiodtype my_period;
1071 if (cal == NULL) return;
1072 my_period = icalperiodtype_null_period();
1074 if (icalcomponent_isa(cal) != ICAL_VEVENT_COMPONENT) {
1075 ical_add_to_freebusy(fb,
1076 icalcomponent_get_first_component(
1077 cal, ICAL_VEVENT_COMPONENT
1085 /* If this event is not opaque, the user isn't publishing it as
1086 * busy time, so don't bother doing anything else.
1088 p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
1090 v = icalproperty_get_value(p);
1092 if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
1098 /* Convert the DTSTART and DTEND properties to an icalperiod. */
1099 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
1101 my_period.start = icalproperty_get_dtstart(p);
1104 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
1106 my_period.end = icalproperty_get_dtstart(p);
1110 icalcomponent_add_property(fb,
1111 icalproperty_new_freebusy(my_period)
1114 /* Make sure the DTSTART property of the freebusy *list* is set to
1115 * the DTSTART property of the *earliest event*.
1117 p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
1119 icalcomponent_set_dtstart(fb,
1120 icalcomponent_get_dtstart(cal) );
1123 if (icaltime_compare(
1124 icalcomponent_get_dtstart(cal),
1125 icalcomponent_get_dtstart(fb)
1127 icalcomponent_set_dtstart(fb,
1128 icalcomponent_get_dtstart(cal) );
1132 /* Make sure the DTEND property of the freebusy *list* is set to
1133 * the DTEND property of the *latest event*.
1135 p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
1137 icalcomponent_set_dtend(fb,
1138 icalcomponent_get_dtend(cal) );
1141 if (icaltime_compare(
1142 icalcomponent_get_dtend(cal),
1143 icalcomponent_get_dtend(fb)
1145 icalcomponent_set_dtend(fb,
1146 icalcomponent_get_dtend(cal) );
1155 * Backend for ical_freebusy()
1157 * This function simply loads the messages in the user's calendar room,
1158 * which contain VEVENTs, then strips them of all non-freebusy data, and
1159 * adds them to the supplied VCALENDAR.
1162 void ical_freebusy_backend(long msgnum, void *data) {
1164 struct CtdlMessage *msg = NULL;
1165 struct ical_respond_data ird;
1167 cal = (icalcomponent *)data;
1169 msg = CtdlFetchMessage(msgnum, 1);
1170 if (msg == NULL) return;
1171 memset(&ird, 0, sizeof ird);
1172 strcpy(ird.desired_partnum, "_HUNT_");
1173 mime_parser(msg->cm_fields['M'],
1175 *ical_locate_part, /* callback function */
1177 (void *) &ird, /* user data */
1180 CtdlFreeMessage(msg);
1182 if (ird.cal == NULL) return;
1184 ical_add_to_freebusy(cal, ird.cal);
1186 /* Now free the memory. */
1187 icalcomponent_free(ird.cal);
1193 * Grab another user's free/busy times
1195 void ical_freebusy(char *who) {
1196 struct ctdluser usbuf;
1197 char calendar_room_name[ROOMNAMELEN];
1198 char hold_rm[ROOMNAMELEN];
1199 char *serialized_request = NULL;
1200 icalcomponent *encaps = NULL;
1201 icalcomponent *fb = NULL;
1202 int found_user = (-1);
1203 struct recptypes *recp = NULL;
1208 int config_lines = 0;
1210 /* First try an exact match. */
1211 found_user = getuser(&usbuf, who);
1213 /* If not found, try it as an unqualified email address. */
1214 if (found_user != 0) {
1216 recp = validate_recipients(buf, NULL, 0);
1217 lprintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1219 if (recp->num_local == 1) {
1220 found_user = getuser(&usbuf, recp->recp_local);
1222 free_recipients(recp);
1226 /* If still not found, try it as an address qualified with the
1227 * primary FQDN of this Citadel node.
1229 if (found_user != 0) {
1230 snprintf(buf, sizeof buf, "%s@%s", who, config.c_fqdn);
1231 lprintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1232 recp = validate_recipients(buf, NULL, 0);
1234 if (recp->num_local == 1) {
1235 found_user = getuser(&usbuf, recp->recp_local);
1237 free_recipients(recp);
1241 /* Still not found? Try qualifying it with every domain we
1242 * might have addresses in.
1244 if (found_user != 0) {
1245 config_lines = num_tokens(inetcfg, '\n');
1246 for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
1247 extract_token(buf, inetcfg, i, '\n', sizeof buf);
1248 extract_token(host, buf, 0, '|', sizeof host);
1249 extract_token(type, buf, 1, '|', sizeof type);
1251 if ( (!strcasecmp(type, "localhost"))
1252 || (!strcasecmp(type, "directory")) ) {
1253 snprintf(buf, sizeof buf, "%s@%s", who, host);
1254 lprintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1255 recp = validate_recipients(buf, NULL, 0);
1257 if (recp->num_local == 1) {
1258 found_user = getuser(&usbuf, recp->recp_local);
1260 free_recipients(recp);
1266 if (found_user != 0) {
1267 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
1271 MailboxName(calendar_room_name, sizeof calendar_room_name,
1272 &usbuf, USERCALENDARROOM);
1274 strcpy(hold_rm, CC->room.QRname); /* save current room */
1276 if (getroom(&CC->room, calendar_room_name) != 0) {
1277 cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
1278 getroom(&CC->room, hold_rm);
1282 /* Create a VFREEBUSY subcomponent */
1283 lprintf(CTDL_DEBUG, "Creating VFREEBUSY component\n");
1284 fb = icalcomponent_new_vfreebusy();
1286 cprintf("%d Internal error: cannot allocate memory.\n",
1287 ERROR + INTERNAL_ERROR);
1288 getroom(&CC->room, hold_rm);
1292 /* Set the method to PUBLISH */
1293 icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
1295 /* Set the DTSTAMP to right now. */
1296 icalcomponent_set_dtstamp(fb, icaltime_from_timet(time(NULL), 0));
1298 /* Add the user's email address as ORGANIZER */
1299 sprintf(buf, "MAILTO:%s", who);
1300 if (strchr(buf, '@') == NULL) {
1302 strcat(buf, config.c_fqdn);
1304 for (i=0; buf[i]; ++i) {
1305 if (buf[i]==' ') buf[i] = '_';
1307 icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
1309 /* Add busy time from events */
1310 lprintf(CTDL_DEBUG, "Adding busy time from events\n");
1311 CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
1313 /* If values for DTSTART and DTEND are still not present, set them
1314 * to yesterday and tomorrow as default values.
1316 if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
1317 icalcomponent_set_dtstart(fb, icaltime_from_timet(time(NULL)-86400L, 0));
1319 if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
1320 icalcomponent_set_dtend(fb, icaltime_from_timet(time(NULL)+86400L, 0));
1323 /* Put the freebusy component into the calendar component */
1324 lprintf(CTDL_DEBUG, "Encapsulating\n");
1325 encaps = ical_encapsulate_subcomponent(fb);
1326 if (encaps == NULL) {
1327 icalcomponent_free(fb);
1328 cprintf("%d Internal error: cannot allocate memory.\n",
1329 ERROR + INTERNAL_ERROR);
1330 getroom(&CC->room, hold_rm);
1334 /* Set the method to PUBLISH */
1335 lprintf(CTDL_DEBUG, "Setting method\n");
1336 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1339 lprintf(CTDL_DEBUG, "Serializing\n");
1340 serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1341 icalcomponent_free(encaps); /* Don't need this anymore. */
1343 cprintf("%d Here is the free/busy data:\n", LISTING_FOLLOWS);
1344 if (serialized_request != NULL) {
1345 client_write(serialized_request, strlen(serialized_request));
1346 free(serialized_request);
1350 /* Go back to the room from which we came... */
1351 getroom(&CC->room, hold_rm);
1357 * Backend for ical_getics()
1359 * This is a ForEachMessage() callback function that searches the current room
1360 * for calendar events and adds them each into one big calendar component.
1362 void ical_getics_backend(long msgnum, void *data) {
1363 icalcomponent *encaps, *c;
1364 struct CtdlMessage *msg = NULL;
1365 struct ical_respond_data ird;
1367 encaps = (icalcomponent *)data;
1368 if (encaps == NULL) return;
1370 /* Look for the calendar event... */
1372 msg = CtdlFetchMessage(msgnum, 1);
1373 if (msg == NULL) return;
1374 memset(&ird, 0, sizeof ird);
1375 strcpy(ird.desired_partnum, "_HUNT_");
1376 mime_parser(msg->cm_fields['M'],
1378 *ical_locate_part, /* callback function */
1380 (void *) &ird, /* user data */
1383 CtdlFreeMessage(msg);
1385 if (ird.cal == NULL) return;
1387 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1388 * are responsible for "the_request"'s memory -- it will be freed
1389 * when we free "encaps".
1392 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1393 * in. This will almost never happen.
1395 if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
1396 icalcomponent_add_component(encaps, ird.cal);
1399 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1400 * and other components encapsulated inside, we have to extract them.
1403 for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
1405 c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
1406 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1408 icalcomponent_free(ird.cal);
1415 * Retrieve all of the calendar items in the current room, and output them
1416 * as a single icalendar object.
1418 void ical_getics(void)
1420 icalcomponent *encaps = NULL;
1423 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1424 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1425 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1426 return; /* Not a vCalendar-centric room */
1429 encaps = icalcomponent_new_vcalendar();
1430 if (encaps == NULL) {
1431 lprintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1432 __FILE__, __LINE__);
1433 cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
1437 cprintf("%d one big calendar\n", LISTING_FOLLOWS);
1439 /* Set the Product ID */
1440 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1442 /* Set the Version Number */
1443 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1445 /* Set the method to PUBLISH */
1446 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1448 /* Now go through the room encapsulating all calendar items. */
1449 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1452 ical_getics_backend,
1456 ser = strdup(icalcomponent_as_ical_string(encaps));
1457 client_write(ser, strlen(ser));
1460 icalcomponent_free(encaps); /* Don't need this anymore. */
1466 * Delete all of the calendar items in the current room, and replace them
1467 * with calendar items from a client-supplied data stream.
1469 void ical_putics(void)
1471 char *calstream = NULL;
1475 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1476 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1477 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1478 return; /* Not a vCalendar-centric room */
1481 if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
1482 cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
1486 cprintf("%d Transmit data now\n", SEND_LISTING);
1487 calstream = CtdlReadMessageBody("000", config.c_maxmsglen, NULL, 0, 0);
1488 if (calstream == NULL) {
1492 cal = icalcomponent_new_from_string(calstream);
1496 /* We got our data stream -- now do something with it. */
1498 /* Delete the existing messages in the room, because we are replacing
1499 * the entire calendar with an entire new (or updated) calendar.
1500 * (Careful: this opens an S_ROOMS critical section!)
1502 CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
1504 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1505 * in. This will almost never happen.
1507 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
1508 ical_write_to_cal(NULL, cal);
1511 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1512 * and other components encapsulated inside, we have to extract them.
1515 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1517 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1518 ical_write_to_cal(NULL, c);
1522 icalcomponent_free(cal);
1527 * All Citadel calendar commands from the client come through here.
1529 void cmd_ical(char *argbuf)
1537 extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
1539 /* Allow "test" and "freebusy" subcommands without logging in. */
1541 if (!strcasecmp(subcmd, "test")) {
1542 cprintf("%d This server supports calendaring\n", CIT_OK);
1546 if (!strcasecmp(subcmd, "freebusy")) {
1547 extract_token(who, argbuf, 1, '|', sizeof who);
1552 if (!strcasecmp(subcmd, "sgi")) {
1553 CIT_ICAL->server_generated_invitations =
1554 (extract_int(argbuf, 1) ? 1 : 0) ;
1556 CIT_OK, CIT_ICAL->server_generated_invitations);
1560 if (CtdlAccessCheck(ac_logged_in)) return;
1562 if (!strcasecmp(subcmd, "respond")) {
1563 msgnum = extract_long(argbuf, 1);
1564 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1565 extract_token(action, argbuf, 3, '|', sizeof action);
1566 ical_respond(msgnum, partnum, action);
1570 if (!strcasecmp(subcmd, "handle_rsvp")) {
1571 msgnum = extract_long(argbuf, 1);
1572 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1573 extract_token(action, argbuf, 3, '|', sizeof action);
1574 ical_handle_rsvp(msgnum, partnum, action);
1578 if (!strcasecmp(subcmd, "conflicts")) {
1579 msgnum = extract_long(argbuf, 1);
1580 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1581 ical_conflicts(msgnum, partnum);
1585 if (!strcasecmp(subcmd, "getics")) {
1590 if (!strcasecmp(subcmd, "putics")) {
1595 cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
1601 * We don't know if the calendar room exists so we just create it at login
1603 void ical_create_room(void)
1608 /* Create the calendar room if it doesn't already exist */
1609 create_room(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
1611 /* Set expiration policy to manual; otherwise objects will be lost! */
1612 if (lgetroom(&qr, USERCALENDARROOM)) {
1613 lprintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1616 qr.QRep.expire_mode = EXPIRE_MANUAL;
1617 qr.QRdefaultview = VIEW_CALENDAR; /* 3 = calendar view */
1620 /* Set the view to a calendar view */
1621 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1622 vbuf.v_view = VIEW_CALENDAR;
1623 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1625 /* Create the tasks list room if it doesn't already exist */
1626 create_room(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
1628 /* Set expiration policy to manual; otherwise objects will be lost! */
1629 if (lgetroom(&qr, USERTASKSROOM)) {
1630 lprintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1633 qr.QRep.expire_mode = EXPIRE_MANUAL;
1634 qr.QRdefaultview = VIEW_TASKS;
1637 /* Set the view to a task list view */
1638 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1639 vbuf.v_view = VIEW_TASKS;
1640 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1642 /* Create the notes room if it doesn't already exist */
1643 create_room(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
1645 /* Set expiration policy to manual; otherwise objects will be lost! */
1646 if (lgetroom(&qr, USERNOTESROOM)) {
1647 lprintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1650 qr.QRep.expire_mode = EXPIRE_MANUAL;
1651 qr.QRdefaultview = VIEW_NOTES;
1654 /* Set the view to a notes view */
1655 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1656 vbuf.v_view = VIEW_NOTES;
1657 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1664 * ical_send_out_invitations() is called by ical_saving_vevent() when it
1667 void ical_send_out_invitations(icalcomponent *cal) {
1668 icalcomponent *the_request = NULL;
1669 char *serialized_request = NULL;
1670 icalcomponent *encaps = NULL;
1671 char *request_message_text = NULL;
1672 struct CtdlMessage *msg = NULL;
1673 struct recptypes *valid = NULL;
1674 char attendees_string[SIZ];
1675 int num_attendees = 0;
1676 char this_attendee[256];
1677 icalproperty *attendee = NULL;
1678 char summary_string[SIZ];
1679 icalproperty *summary = NULL;
1683 lprintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
1688 /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
1689 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1690 ical_send_out_invitations(
1691 icalcomponent_get_first_component(
1692 cal, ICAL_VEVENT_COMPONENT
1698 /* Clone the event */
1699 the_request = icalcomponent_new_clone(cal);
1700 if (the_request == NULL) {
1701 lprintf(CTDL_ERR, "ERROR: cannot clone calendar object\n");
1705 /* Extract the summary string -- we'll use it as the
1706 * message subject for the request
1708 strcpy(summary_string, "Meeting request");
1709 summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
1710 if (summary != NULL) {
1711 if (icalproperty_get_summary(summary)) {
1712 strcpy(summary_string,
1713 icalproperty_get_summary(summary) );
1717 /* Determine who the recipients of this message are (the attendees) */
1718 strcpy(attendees_string, "");
1719 for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
1720 if (icalproperty_get_attendee(attendee)) {
1721 safestrncpy(this_attendee, icalproperty_get_attendee(attendee), sizeof this_attendee);
1722 if (!strncasecmp(this_attendee, "MAILTO:", 7)) {
1723 strcpy(this_attendee, &this_attendee[7]);
1725 if (!CtdlIsMe(this_attendee, sizeof this_attendee)) { /* don't send an invitation to myself! */
1726 snprintf(&attendees_string[strlen(attendees_string)],
1727 sizeof(attendees_string) - strlen(attendees_string),
1737 lprintf(CTDL_DEBUG, "<%d> attendees: <%s>\n", num_attendees, attendees_string);
1739 /* If there are no attendees, there are no invitations to send, so...
1740 * don't bother putting one together! Punch out, Maverick!
1742 if (num_attendees == 0) {
1743 icalcomponent_free(the_request);
1747 /* Encapsulate the VEVENT component into a complete VCALENDAR */
1748 encaps = icalcomponent_new_vcalendar();
1749 if (encaps == NULL) {
1750 lprintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1751 __FILE__, __LINE__);
1752 icalcomponent_free(the_request);
1756 /* Set the Product ID */
1757 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1759 /* Set the Version Number */
1760 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1762 /* Set the method to REQUEST */
1763 icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
1765 /* Now make sure all of the DTSTART and DTEND properties are UTC. */
1766 ical_dezonify(the_request);
1768 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1769 * are responsible for "the_request"'s memory -- it will be freed
1770 * when we free "encaps".
1772 icalcomponent_add_component(encaps, the_request);
1775 serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1776 icalcomponent_free(encaps); /* Don't need this anymore. */
1777 if (serialized_request == NULL) return;
1779 reqsize = strlen(serialized_request) + SIZ;
1780 request_message_text = malloc(reqsize);
1781 if (request_message_text != NULL) {
1782 snprintf(request_message_text, reqsize,
1783 "Content-type: text/calendar\r\n\r\n%s\r\n",
1787 msg = CtdlMakeMessage(&CC->user,
1788 "", /* No single recipient here */
1789 "", /* No single recipient here */
1790 CC->room.QRname, 0, FMT_RFC822,
1793 summary_string, /* Use summary for subject */
1795 request_message_text);
1798 valid = validate_recipients(attendees_string, NULL, 0);
1799 CtdlSubmitMsg(msg, valid, "");
1800 CtdlFreeMessage(msg);
1801 free_recipients(valid);
1804 free(serialized_request);
1809 * When a calendar object is being saved, determine whether it's a VEVENT
1810 * and the user saving it is the organizer. If so, send out invitations
1811 * to any listed attendees.
1814 void ical_saving_vevent(icalcomponent *cal) {
1816 icalproperty *organizer = NULL;
1817 char organizer_string[SIZ];
1819 lprintf(CTDL_DEBUG, "ical_saving_vevent() has been called!\n");
1821 /* Don't send out invitations unless the client wants us to. */
1822 if (CIT_ICAL->server_generated_invitations == 0) {
1826 /* Don't send out invitations if we've been asked not to. */
1827 if (CIT_ICAL->avoid_sending_invitations > 0) {
1831 strcpy(organizer_string, "");
1833 * The VEVENT subcomponent is the one we're interested in.
1834 * Send out invitations if, and only if, this user is the Organizer.
1836 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
1837 organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
1838 if (organizer != NULL) {
1839 if (icalproperty_get_organizer(organizer)) {
1840 strcpy(organizer_string,
1841 icalproperty_get_organizer(organizer));
1844 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
1845 strcpy(organizer_string, &organizer_string[7]);
1846 striplt(organizer_string);
1848 * If the user saving the event is listed as the
1849 * organizer, then send out invitations.
1851 if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
1852 ical_send_out_invitations(cal);
1857 /* If the component has subcomponents, recurse through them. */
1858 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1860 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1861 /* Recursively process subcomponent */
1862 ical_saving_vevent(c);
1870 * Back end for ical_obj_beforesave()
1871 * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
1872 * the summary of the event (becomes message subject),
1873 * and the start time (becomes message date/time).
1875 void ical_ctdl_set_exclusive_msgid(char *name, char *filename, char *partnum,
1876 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
1877 char *encoding, void *cbuserdata)
1879 icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
1881 struct icalmessagemod *imm;
1884 imm = (struct icalmessagemod *)cbuserdata;
1886 /* We're only interested in calendar data. */
1887 if ( (strcasecmp(cbtype, "text/calendar"))
1888 && (strcasecmp(cbtype, "application/ics")) ) {
1892 /* Hunt for the UID and drop it in
1893 * the "user data" pointer for the MIME parser. When
1894 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
1897 whole_cal = icalcomponent_new_from_string(content);
1900 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1901 nested_event = icalcomponent_get_first_component(
1902 cal, ICAL_VEVENT_COMPONENT);
1903 if (nested_event != NULL) {
1907 nested_todo = icalcomponent_get_first_component(
1908 cal, ICAL_VTODO_COMPONENT);
1909 if (nested_todo != NULL) {
1916 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
1918 /* If there's no uid we must generate one */
1919 generate_uuid(new_uid);
1920 icalcomponent_add_property(cal, icalproperty_new_uid(new_uid));
1921 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
1924 strcpy(imm->uid, icalproperty_get_comment(p));
1926 p = ical_ctdl_get_subprop(cal, ICAL_SUMMARY_PROPERTY);
1928 strcpy(imm->subject, icalproperty_get_comment(p));
1930 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
1932 imm->dtstart = icaltime_as_timet(icalproperty_get_dtstart(p));
1935 icalcomponent_free(cal);
1936 if (whole_cal != cal) {
1937 icalcomponent_free(whole_cal);
1946 * See if we need to prevent the object from being saved (we don't allow
1947 * MIME types other than text/calendar in "calendar" or "tasks" rooms). Also,
1948 * when saving an event to the calendar, set the message's Citadel exclusive
1949 * message ID to the UID of the object. This causes our replication checker to
1950 * automatically delete any existing instances of the same object. (Isn't
1953 * We also set the message's Subject to the event summary, and the Date/time to
1954 * the event start time.
1956 int ical_obj_beforesave(struct CtdlMessage *msg)
1958 struct icalmessagemod imm;
1960 /* First determine if this is a calendar or tasks room */
1961 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1962 && (CC->room.QRdefaultview != VIEW_TASKS)
1964 return(0); /* Not a vCalendar-centric room */
1967 /* It must be an RFC822 message! */
1968 if (msg->cm_format_type != 4) {
1969 lprintf(CTDL_DEBUG, "Rejecting non-RFC822 message\n");
1970 return(1); /* You tried to save a non-RFC822 message! */
1973 if (msg->cm_fields['M'] == NULL) {
1974 return(1); /* You tried to save a null message! */
1977 memset(&imm, 0, sizeof(struct icalmessagemod));
1979 /* Do all of our lovely back-end parsing */
1980 mime_parser(msg->cm_fields['M'],
1982 *ical_ctdl_set_exclusive_msgid,
1988 if (!IsEmptyStr(imm.uid)) {
1989 if (msg->cm_fields['E'] != NULL) {
1990 free(msg->cm_fields['E']);
1992 msg->cm_fields['E'] = strdup(imm.uid);
1993 lprintf(CTDL_DEBUG, "Saving calendar UID <%s>\n", msg->cm_fields['E']);
1995 if (!IsEmptyStr(imm.subject)) {
1996 if (msg->cm_fields['U'] != NULL) {
1997 free(msg->cm_fields['U']);
1999 msg->cm_fields['U'] = strdup(imm.subject);
2001 if (imm.dtstart > 0) {
2002 if (msg->cm_fields['T'] != NULL) {
2003 free(msg->cm_fields['T']);
2005 msg->cm_fields['T'] = strdup("000000000000000000");
2006 sprintf(msg->cm_fields['T'], "%ld", imm.dtstart);
2014 * Things we need to do after saving a calendar event.
2016 void ical_obj_aftersave_backend(char *name, char *filename, char *partnum,
2017 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2018 char *encoding, void *cbuserdata)
2022 /* We're only interested in calendar items here. */
2023 if ( (strcasecmp(cbtype, "text/calendar"))
2024 && (strcasecmp(cbtype, "application/ics")) ) {
2028 /* Hunt for the UID and drop it in
2029 * the "user data" pointer for the MIME parser. When
2030 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2033 if ( (!strcasecmp(cbtype, "text/calendar"))
2034 || (!strcasecmp(cbtype, "application/ics")) ) {
2035 cal = icalcomponent_new_from_string(content);
2037 ical_saving_vevent(cal);
2038 icalcomponent_free(cal);
2045 * Things we need to do after saving a calendar event.
2046 * (This will start back end tasks such as automatic generation of invitations,
2047 * if such actions are appropriate.)
2049 int ical_obj_aftersave(struct CtdlMessage *msg)
2051 char roomname[ROOMNAMELEN];
2054 * If this isn't the Calendar> room, no further action is necessary.
2057 /* First determine if this is our room */
2058 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
2059 if (strcasecmp(roomname, CC->room.QRname)) {
2060 return(0); /* Not the Calendar room -- don't do anything. */
2063 /* It must be an RFC822 message! */
2064 if (msg->cm_format_type != 4) return(1);
2066 /* Reject null messages */
2067 if (msg->cm_fields['M'] == NULL) return(1);
2069 /* Now recurse through it looking for our icalendar data */
2070 mime_parser(msg->cm_fields['M'],
2072 *ical_obj_aftersave_backend,
2082 void ical_session_startup(void) {
2083 CIT_ICAL = malloc(sizeof(struct cit_ical));
2084 memset(CIT_ICAL, 0, sizeof(struct cit_ical));
2087 void ical_session_shutdown(void) {
2093 * Back end for ical_fixed_output()
2095 void ical_fixed_output_backend(icalcomponent *cal,
2102 p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
2104 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2107 p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
2109 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2112 p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
2114 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2117 /* If the component has attendees, iterate through them. */
2118 for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
2119 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
2120 if (!strncasecmp(buf, "MAILTO:", 7)) {
2122 /* screen name or email address */
2123 strcpy(buf, &buf[7]);
2125 cprintf("%s ", buf);
2130 /* If the component has subcomponents, recurse through them. */
2131 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2133 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2134 /* Recursively process subcomponent */
2135 ical_fixed_output_backend(c, recursion_level+1);
2142 * Function to output vcalendar data as plain text. Nobody uses MSG0
2143 * anymore, so really this is just so we expose the vCard data to the full
2146 void ical_fixed_output(char *ptr, int len) {
2150 stringy_cal = malloc(len + 1);
2151 safestrncpy(stringy_cal, ptr, len + 1);
2152 cal = icalcomponent_new_from_string(stringy_cal);
2160 ical_fixed_output_backend(cal, 0);
2162 /* Free the memory we obtained from libical's constructor */
2163 icalcomponent_free(cal);
2168 void serv_calendar_destroy(void)
2170 icaltimezone_free_builtin_timezones();
2174 * Register this module with the Citadel server.
2176 CTDL_MODULE_INIT(calendar)
2180 CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
2181 CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
2182 CtdlRegisterSessionHook(ical_create_room, EVT_LOGIN);
2183 CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCal commands");
2184 CtdlRegisterSessionHook(ical_session_startup, EVT_START);
2185 CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP);
2186 CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
2187 CtdlRegisterFixedOutputHook("application/ics", ical_fixed_output);
2188 CtdlRegisterCleanupHook(serv_calendar_destroy);
2191 /* return our Subversion id for the Log */