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 CtdlLogPrintf(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 CtdlLogPrintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
240 the_reply = icalcomponent_new_clone(request);
241 if (the_reply == NULL) {
242 CtdlLogPrintf(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 */
351 valid = validate_recipients(organizer_string, NULL, 0);
352 CtdlSubmitMsg(msg, valid, "");
353 CtdlFreeMessage(msg);
354 free_recipients(valid);
357 free(serialized_reply);
363 * Callback function for mime parser that hunts for calendar content types
364 * and turns them into calendar objects
366 void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
367 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
370 struct ical_respond_data *ird = NULL;
372 ird = (struct ical_respond_data *) cbuserdata;
374 /* desired_partnum can be set to "_HUNT_" to have it just look for
375 * the first part with a content type of text/calendar. Otherwise
376 * we have to only process the right one.
378 if (strcasecmp(ird->desired_partnum, "_HUNT_")) {
379 if (strcasecmp(partnum, ird->desired_partnum)) {
384 if ( (strcasecmp(cbtype, "text/calendar"))
385 && (strcasecmp(cbtype, "application/ics")) ) {
389 if (ird->cal != NULL) {
390 icalcomponent_free(ird->cal);
394 ird->cal = icalcomponent_new_from_string(content);
395 if (ird->cal != NULL) {
396 ical_dezonify(ird->cal);
402 * Respond to a meeting request.
404 void ical_respond(long msgnum, char *partnum, char *action) {
405 struct CtdlMessage *msg = NULL;
406 struct ical_respond_data ird;
409 (strcasecmp(action, "accept"))
410 && (strcasecmp(action, "decline"))
412 cprintf("%d Action must be 'accept' or 'decline'\n",
413 ERROR + ILLEGAL_VALUE
418 msg = CtdlFetchMessage(msgnum, 1);
420 cprintf("%d Message %ld not found.\n",
421 ERROR + ILLEGAL_VALUE,
427 memset(&ird, 0, sizeof ird);
428 strcpy(ird.desired_partnum, partnum);
429 mime_parser(msg->cm_fields['M'],
431 *ical_locate_part, /* callback function */
433 (void *) &ird, /* user data */
437 /* We're done with the incoming message, because we now have a
438 * calendar object in memory.
440 CtdlFreeMessage(msg);
443 * Here is the real meat of this function. Handle the event.
445 if (ird.cal != NULL) {
446 /* Save this in the user's calendar if necessary */
447 if (!strcasecmp(action, "accept")) {
448 ical_add(ird.cal, 0);
451 /* Send a reply if necessary */
452 if (icalcomponent_get_method(ird.cal) == ICAL_METHOD_REQUEST) {
453 ical_send_a_reply(ird.cal, action);
456 /* Now that we've processed this message, we don't need it
457 * anymore. So delete it. (NOTE we don't do this anymore.)
458 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
461 /* Free the memory we allocated and return a response. */
462 icalcomponent_free(ird.cal);
464 cprintf("%d ok\n", CIT_OK);
468 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
472 /* should never get here */
477 * Figure out the UID of the calendar event being referred to in a
478 * REPLY object. This function is recursive.
480 void ical_learn_uid_of_reply(char *uidbuf, icalcomponent *cal) {
481 icalcomponent *subcomponent;
484 /* If this object is a REPLY, then extract the UID. */
485 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
486 p = icalcomponent_get_first_property(cal, ICAL_UID_PROPERTY);
488 strcpy(uidbuf, icalproperty_get_comment(p));
492 /* Otherwise, recurse through any VEVENT subcomponents. We do NOT want the
493 * UID of the reply; we want the UID of the invitation being replied to.
495 for (subcomponent = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
496 subcomponent != NULL;
497 subcomponent = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT) ) {
498 ical_learn_uid_of_reply(uidbuf, subcomponent);
504 * ical_update_my_calendar_with_reply() refers to this callback function; when we
505 * locate the message containing the calendar event we're replying to, this function
506 * gets called. It basically just sticks the message number in a supplied buffer.
508 void ical_hunt_for_event_to_update(long msgnum, void *data) {
511 msgnumptr = (long *) data;
516 struct original_event_container {
521 * Callback function for mime parser that hunts for calendar content types
522 * and turns them into calendar objects (called by ical_update_my_calendar_with_reply()
523 * to fetch the object being updated)
525 void ical_locate_original_event(char *name, char *filename, char *partnum, char *disp,
526 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
529 struct original_event_container *oec = NULL;
531 if ( (strcasecmp(cbtype, "text/calendar"))
532 && (strcasecmp(cbtype, "application/ics")) ) {
535 oec = (struct original_event_container *) cbuserdata;
536 if (oec->c != NULL) {
537 icalcomponent_free(oec->c);
539 oec->c = icalcomponent_new_from_string(content);
544 * Merge updated attendee information from a REPLY into an existing event.
546 void ical_merge_attendee_reply(icalcomponent *event, icalcomponent *reply) {
548 icalproperty *e_attendee, *r_attendee;
550 /* First things first. If we're not looking at a VEVENT component,
551 * recurse through subcomponents until we find one.
553 if (icalcomponent_isa(event) != ICAL_VEVENT_COMPONENT) {
554 for (c = icalcomponent_get_first_component(event, ICAL_VEVENT_COMPONENT);
556 c = icalcomponent_get_next_component(event, ICAL_VEVENT_COMPONENT) ) {
557 ical_merge_attendee_reply(c, reply);
562 /* Now do the same thing with the reply.
564 if (icalcomponent_isa(reply) != ICAL_VEVENT_COMPONENT) {
565 for (c = icalcomponent_get_first_component(reply, ICAL_VEVENT_COMPONENT);
567 c = icalcomponent_get_next_component(reply, ICAL_VEVENT_COMPONENT) ) {
568 ical_merge_attendee_reply(event, c);
573 /* Clone the reply, because we're going to rip its guts out. */
574 reply = icalcomponent_new_clone(reply);
576 /* At this point we're looking at the correct subcomponents.
577 * Iterate through the attendees looking for a match.
580 for (e_attendee = icalcomponent_get_first_property(event, ICAL_ATTENDEE_PROPERTY);
582 e_attendee = icalcomponent_get_next_property(event, ICAL_ATTENDEE_PROPERTY)) {
584 for (r_attendee = icalcomponent_get_first_property(reply, ICAL_ATTENDEE_PROPERTY);
586 r_attendee = icalcomponent_get_next_property(reply, ICAL_ATTENDEE_PROPERTY)) {
588 /* Check to see if these two attendees match...
591 icalproperty_get_attendee(e_attendee),
592 icalproperty_get_attendee(r_attendee)
594 /* ...and if they do, remove the attendee from the event
595 * and replace it with the attendee from the reply. (The
596 * reply's copy will have the same address, but an updated
599 icalcomponent_remove_property(event, e_attendee);
600 icalproperty_free(e_attendee);
601 icalcomponent_remove_property(reply, r_attendee);
602 icalcomponent_add_property(event, r_attendee);
604 /* Since we diddled both sets of attendees, we have to start
605 * the iteration over again. This will not create an infinite
606 * loop because we removed the attendee from the reply. (That's
607 * why we cloned the reply, and that's what we mean by "ripping
616 /* Free the *clone* of the reply. */
617 icalcomponent_free(reply);
624 * Handle an incoming RSVP (object with method==ICAL_METHOD_REPLY) for a
625 * calendar event. The object has already been deserialized for us; all
626 * we have to do here is hunt for the event in our calendar, merge in the
627 * updated attendee status, and save it again.
629 * This function returns 0 on success, 1 if the event was not found in the
630 * user's calendar, or 2 if an internal error occurred.
632 int ical_update_my_calendar_with_reply(icalcomponent *cal) {
634 char hold_rm[ROOMNAMELEN];
635 long msgnum_being_replaced = 0;
636 struct CtdlMessage *msg = NULL;
637 struct original_event_container oec;
638 icalcomponent *original_event;
639 char *serialized_event = NULL;
640 char roomname[ROOMNAMELEN];
641 char *message_text = NULL;
643 /* Figure out just what event it is we're dealing with */
644 strcpy(uid, "--==<< InVaLiD uId >>==--");
645 ical_learn_uid_of_reply(uid, cal);
646 CtdlLogPrintf(CTDL_DEBUG, "UID of event being replied to is <%s>\n", uid);
648 strcpy(hold_rm, CC->room.QRname); /* save current room */
650 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
651 getroom(&CC->room, hold_rm);
652 CtdlLogPrintf(CTDL_CRIT, "cannot get user calendar room\n");
657 * Look in the EUID index for a message with
658 * the Citadel EUID set to the value we're looking for. Since
659 * Citadel always sets the message EUID to the vCalendar UID of
660 * the event, this will work.
662 msgnum_being_replaced = locate_message_by_euid(uid, &CC->room);
664 getroom(&CC->room, hold_rm); /* return to saved room */
666 CtdlLogPrintf(CTDL_DEBUG, "msgnum_being_replaced == %ld\n", msgnum_being_replaced);
667 if (msgnum_being_replaced == 0) {
668 return(1); /* no calendar event found */
671 /* Now we know the ID of the message containing the event being updated.
672 * We don't actually have to delete it; that'll get taken care of by the
673 * server when we save another event with the same UID. This just gives
674 * us the ability to load the event into memory so we can diddle the
677 msg = CtdlFetchMessage(msgnum_being_replaced, 1);
679 return(2); /* internal error */
682 mime_parser(msg->cm_fields['M'],
684 *ical_locate_original_event, /* callback function */
686 &oec, /* user data */
689 CtdlFreeMessage(msg);
691 original_event = oec.c;
692 if (original_event == NULL) {
693 CtdlLogPrintf(CTDL_ERR, "ERROR: Original_component is NULL.\n");
697 /* Merge the attendee's updated status into the event */
698 ical_merge_attendee_reply(original_event, cal);
701 serialized_event = strdup(icalcomponent_as_ical_string(original_event));
702 icalcomponent_free(original_event); /* Don't need this anymore. */
703 if (serialized_event == NULL) return(2);
705 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
707 message_text = malloc(strlen(serialized_event) + SIZ);
708 if (message_text != NULL) {
709 sprintf(message_text,
710 "Content-type: text/calendar charset=\"utf-8\"\r\n\r\n%s\r\n",
714 msg = CtdlMakeMessage(&CC->user,
715 "", /* No recipient */
716 "", /* No recipient */
727 CIT_ICAL->avoid_sending_invitations = 1;
728 CtdlSubmitMsg(msg, NULL, roomname);
729 CtdlFreeMessage(msg);
730 CIT_ICAL->avoid_sending_invitations = 0;
733 free(serialized_event);
739 * Handle an incoming RSVP for an event. (This is the server subcommand part; it
740 * simply extracts the calendar object from the message, deserializes it, and
741 * passes it up to ical_update_my_calendar_with_reply() for processing.
743 void ical_handle_rsvp(long msgnum, char *partnum, char *action) {
744 struct CtdlMessage *msg = NULL;
745 struct ical_respond_data ird;
749 (strcasecmp(action, "update"))
750 && (strcasecmp(action, "ignore"))
752 cprintf("%d Action must be 'update' or 'ignore'\n",
753 ERROR + ILLEGAL_VALUE
758 msg = CtdlFetchMessage(msgnum, 1);
760 cprintf("%d Message %ld not found.\n",
761 ERROR + ILLEGAL_VALUE,
767 memset(&ird, 0, sizeof ird);
768 strcpy(ird.desired_partnum, partnum);
769 mime_parser(msg->cm_fields['M'],
771 *ical_locate_part, /* callback function */
773 (void *) &ird, /* user data */
777 /* We're done with the incoming message, because we now have a
778 * calendar object in memory.
780 CtdlFreeMessage(msg);
783 * Here is the real meat of this function. Handle the event.
785 if (ird.cal != NULL) {
786 /* Update the user's calendar if necessary */
787 if (!strcasecmp(action, "update")) {
788 ret = ical_update_my_calendar_with_reply(ird.cal);
790 cprintf("%d Your calendar has been updated with this reply.\n",
794 cprintf("%d This event does not exist in your calendar.\n",
795 ERROR + FILE_NOT_FOUND);
798 cprintf("%d An internal error occurred.\n",
799 ERROR + INTERNAL_ERROR);
803 cprintf("%d This reply has been ignored.\n", CIT_OK);
806 /* Now that we've processed this message, we don't need it
807 * anymore. So delete it. (Don't do this anymore.)
808 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
811 /* Free the memory we allocated and return a response. */
812 icalcomponent_free(ird.cal);
817 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
821 /* should never get here */
826 * Search for a property in both the top level and in a VEVENT subcomponent
828 icalproperty *ical_ctdl_get_subprop(
830 icalproperty_kind which_prop
835 p = icalcomponent_get_first_property(cal, which_prop);
837 c = icalcomponent_get_first_component(cal,
838 ICAL_VEVENT_COMPONENT);
840 p = icalcomponent_get_first_property(c, which_prop);
848 * Check to see if two events overlap. Returns nonzero if they do.
849 * (This function is used in both Citadel and WebCit. If you change it in
850 * one place, change it in the other. Better yet, put it in a library.)
852 int ical_ctdl_is_overlap(
853 struct icaltimetype t1start,
854 struct icaltimetype t1end,
855 struct icaltimetype t2start,
856 struct icaltimetype t2end
859 if (icaltime_is_null_time(t1start)) return(0);
860 if (icaltime_is_null_time(t2start)) return(0);
862 /* First, check for all-day events */
863 if (t1start.is_date) {
864 if (!icaltime_compare_date_only(t1start, t2start,
865 icaltimezone_get_utc_timezone())) {
868 if (!icaltime_is_null_time(t2end)) {
869 if (!icaltime_compare_date_only(t1start, t2end,
870 icaltimezone_get_utc_timezone())) {
876 if (t2start.is_date) {
877 if (!icaltime_compare_date_only(t2start, t1start,
878 icaltimezone_get_utc_timezone())) {
881 if (!icaltime_is_null_time(t1end)) {
882 if (!icaltime_compare_date_only(t2start, t1end,
883 icaltimezone_get_utc_timezone())) {
889 /* Now check for overlaps using date *and* time. */
891 /* First, bail out if either event 1 or event 2 is missing end time. */
892 if (icaltime_is_null_time(t1end)) return(0);
893 if (icaltime_is_null_time(t2end)) return(0);
895 /* If event 1 ends before event 2 starts, we're in the clear. */
896 if (icaltime_compare(t1end, t2start) <= 0) return(0);
898 /* If event 2 ends before event 1 starts, we're also ok. */
899 if (icaltime_compare(t2end, t1start) <= 0) return(0);
901 /* Otherwise, they overlap. */
908 * Backend for ical_hunt_for_conflicts()
910 void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
912 struct CtdlMessage *msg = NULL;
913 struct ical_respond_data ird;
914 struct icaltimetype t1start, t1end, t2start, t2end;
916 char conflict_event_uid[SIZ];
917 char conflict_event_summary[SIZ];
918 char compare_uid[SIZ];
920 cal = (icalcomponent *)data;
921 strcpy(compare_uid, "");
922 strcpy(conflict_event_uid, "");
923 strcpy(conflict_event_summary, "");
925 msg = CtdlFetchMessage(msgnum, 1);
926 if (msg == NULL) return;
927 memset(&ird, 0, sizeof ird);
928 strcpy(ird.desired_partnum, "_HUNT_");
929 mime_parser(msg->cm_fields['M'],
931 *ical_locate_part, /* callback function */
933 (void *) &ird, /* user data */
936 CtdlFreeMessage(msg);
938 if (ird.cal == NULL) return;
940 t1start = icaltime_null_time();
941 t1end = icaltime_null_time();
942 t2start = icaltime_null_time();
943 t1end = icaltime_null_time();
945 /* Now compare cal to ird.cal */
946 p = ical_ctdl_get_subprop(ird.cal, ICAL_DTSTART_PROPERTY);
947 if (p == NULL) return;
948 if (p != NULL) t2start = icalproperty_get_dtstart(p);
950 p = ical_ctdl_get_subprop(ird.cal, ICAL_DTEND_PROPERTY);
951 if (p != NULL) t2end = icalproperty_get_dtend(p);
953 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
954 if (p == NULL) return;
955 if (p != NULL) t1start = icalproperty_get_dtstart(p);
957 p = ical_ctdl_get_subprop(cal, ICAL_DTEND_PROPERTY);
958 if (p != NULL) t1end = icalproperty_get_dtend(p);
960 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
962 strcpy(compare_uid, icalproperty_get_comment(p));
965 p = ical_ctdl_get_subprop(ird.cal, ICAL_UID_PROPERTY);
967 strcpy(conflict_event_uid, icalproperty_get_comment(p));
970 p = ical_ctdl_get_subprop(ird.cal, ICAL_SUMMARY_PROPERTY);
972 strcpy(conflict_event_summary, icalproperty_get_comment(p));
975 icalcomponent_free(ird.cal);
977 if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
978 cprintf("%ld||%s|%s|%d|\n",
981 conflict_event_summary,
982 ( ((strlen(compare_uid)>0)
983 &&(!strcasecmp(compare_uid,
984 conflict_event_uid))) ? 1 : 0
993 * Phase 2 of "hunt for conflicts" operation.
994 * At this point we have a calendar object which represents the VEVENT that
995 * we're considering adding to the calendar. Now hunt through the user's
996 * calendar room, and output zero or more existing VEVENTs which conflict
999 void ical_hunt_for_conflicts(icalcomponent *cal) {
1000 char hold_rm[ROOMNAMELEN];
1002 strcpy(hold_rm, CC->room.QRname); /* save current room */
1004 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
1005 getroom(&CC->room, hold_rm);
1006 cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
1010 cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
1012 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1015 ical_hunt_for_conflicts_backend,
1020 getroom(&CC->room, hold_rm); /* return to saved room */
1027 * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
1029 void ical_conflicts(long msgnum, char *partnum) {
1030 struct CtdlMessage *msg = NULL;
1031 struct ical_respond_data ird;
1033 msg = CtdlFetchMessage(msgnum, 1);
1035 cprintf("%d Message %ld not found.\n",
1036 ERROR + ILLEGAL_VALUE,
1042 memset(&ird, 0, sizeof ird);
1043 strcpy(ird.desired_partnum, partnum);
1044 mime_parser(msg->cm_fields['M'],
1046 *ical_locate_part, /* callback function */
1048 (void *) &ird, /* user data */
1052 CtdlFreeMessage(msg);
1054 if (ird.cal != NULL) {
1055 ical_hunt_for_conflicts(ird.cal);
1056 icalcomponent_free(ird.cal);
1060 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
1064 /* should never get here */
1070 * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
1072 void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *cal) {
1075 struct icalperiodtype my_period;
1077 if (cal == NULL) return;
1078 my_period = icalperiodtype_null_period();
1080 if (icalcomponent_isa(cal) != ICAL_VEVENT_COMPONENT) {
1081 ical_add_to_freebusy(fb,
1082 icalcomponent_get_first_component(
1083 cal, ICAL_VEVENT_COMPONENT
1091 /* If this event is not opaque, the user isn't publishing it as
1092 * busy time, so don't bother doing anything else.
1094 p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
1096 v = icalproperty_get_value(p);
1098 if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
1104 /* Convert the DTSTART and DTEND properties to an icalperiod. */
1105 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
1107 my_period.start = icalproperty_get_dtstart(p);
1110 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
1112 my_period.end = icalproperty_get_dtstart(p);
1116 icalcomponent_add_property(fb,
1117 icalproperty_new_freebusy(my_period)
1120 /* Make sure the DTSTART property of the freebusy *list* is set to
1121 * the DTSTART property of the *earliest event*.
1123 p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
1125 icalcomponent_set_dtstart(fb,
1126 icalcomponent_get_dtstart(cal) );
1129 if (icaltime_compare(
1130 icalcomponent_get_dtstart(cal),
1131 icalcomponent_get_dtstart(fb)
1133 icalcomponent_set_dtstart(fb,
1134 icalcomponent_get_dtstart(cal) );
1138 /* Make sure the DTEND property of the freebusy *list* is set to
1139 * the DTEND property of the *latest event*.
1141 p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
1143 icalcomponent_set_dtend(fb,
1144 icalcomponent_get_dtend(cal) );
1147 if (icaltime_compare(
1148 icalcomponent_get_dtend(cal),
1149 icalcomponent_get_dtend(fb)
1151 icalcomponent_set_dtend(fb,
1152 icalcomponent_get_dtend(cal) );
1161 * Backend for ical_freebusy()
1163 * This function simply loads the messages in the user's calendar room,
1164 * which contain VEVENTs, then strips them of all non-freebusy data, and
1165 * adds them to the supplied VCALENDAR.
1168 void ical_freebusy_backend(long msgnum, void *data) {
1170 struct CtdlMessage *msg = NULL;
1171 struct ical_respond_data ird;
1173 cal = (icalcomponent *)data;
1175 msg = CtdlFetchMessage(msgnum, 1);
1176 if (msg == NULL) return;
1177 memset(&ird, 0, sizeof ird);
1178 strcpy(ird.desired_partnum, "_HUNT_");
1179 mime_parser(msg->cm_fields['M'],
1181 *ical_locate_part, /* callback function */
1183 (void *) &ird, /* user data */
1186 CtdlFreeMessage(msg);
1188 if (ird.cal == NULL) return;
1190 ical_add_to_freebusy(cal, ird.cal);
1192 /* Now free the memory. */
1193 icalcomponent_free(ird.cal);
1199 * Grab another user's free/busy times
1201 void ical_freebusy(char *who) {
1202 struct ctdluser usbuf;
1203 char calendar_room_name[ROOMNAMELEN];
1204 char hold_rm[ROOMNAMELEN];
1205 char *serialized_request = NULL;
1206 icalcomponent *encaps = NULL;
1207 icalcomponent *fb = NULL;
1208 int found_user = (-1);
1209 struct recptypes *recp = NULL;
1214 int config_lines = 0;
1216 /* First try an exact match. */
1217 found_user = getuser(&usbuf, who);
1219 /* If not found, try it as an unqualified email address. */
1220 if (found_user != 0) {
1222 recp = validate_recipients(buf, NULL, 0);
1223 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1225 if (recp->num_local == 1) {
1226 found_user = getuser(&usbuf, recp->recp_local);
1228 free_recipients(recp);
1232 /* If still not found, try it as an address qualified with the
1233 * primary FQDN of this Citadel node.
1235 if (found_user != 0) {
1236 snprintf(buf, sizeof buf, "%s@%s", who, config.c_fqdn);
1237 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1238 recp = validate_recipients(buf, NULL, 0);
1240 if (recp->num_local == 1) {
1241 found_user = getuser(&usbuf, recp->recp_local);
1243 free_recipients(recp);
1247 /* Still not found? Try qualifying it with every domain we
1248 * might have addresses in.
1250 if (found_user != 0) {
1251 config_lines = num_tokens(inetcfg, '\n');
1252 for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
1253 extract_token(buf, inetcfg, i, '\n', sizeof buf);
1254 extract_token(host, buf, 0, '|', sizeof host);
1255 extract_token(type, buf, 1, '|', sizeof type);
1257 if ( (!strcasecmp(type, "localhost"))
1258 || (!strcasecmp(type, "directory")) ) {
1259 snprintf(buf, sizeof buf, "%s@%s", who, host);
1260 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1261 recp = validate_recipients(buf, NULL, 0);
1263 if (recp->num_local == 1) {
1264 found_user = getuser(&usbuf, recp->recp_local);
1266 free_recipients(recp);
1272 if (found_user != 0) {
1273 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
1277 MailboxName(calendar_room_name, sizeof calendar_room_name,
1278 &usbuf, USERCALENDARROOM);
1280 strcpy(hold_rm, CC->room.QRname); /* save current room */
1282 if (getroom(&CC->room, calendar_room_name) != 0) {
1283 cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
1284 getroom(&CC->room, hold_rm);
1288 /* Create a VFREEBUSY subcomponent */
1289 CtdlLogPrintf(CTDL_DEBUG, "Creating VFREEBUSY component\n");
1290 fb = icalcomponent_new_vfreebusy();
1292 cprintf("%d Internal error: cannot allocate memory.\n",
1293 ERROR + INTERNAL_ERROR);
1294 getroom(&CC->room, hold_rm);
1298 /* Set the method to PUBLISH */
1299 icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
1301 /* Set the DTSTAMP to right now. */
1302 icalcomponent_set_dtstamp(fb, icaltime_from_timet(time(NULL), 0));
1304 /* Add the user's email address as ORGANIZER */
1305 sprintf(buf, "MAILTO:%s", who);
1306 if (strchr(buf, '@') == NULL) {
1308 strcat(buf, config.c_fqdn);
1310 for (i=0; buf[i]; ++i) {
1311 if (buf[i]==' ') buf[i] = '_';
1313 icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
1315 /* Add busy time from events */
1316 CtdlLogPrintf(CTDL_DEBUG, "Adding busy time from events\n");
1317 CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
1319 /* If values for DTSTART and DTEND are still not present, set them
1320 * to yesterday and tomorrow as default values.
1322 if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
1323 icalcomponent_set_dtstart(fb, icaltime_from_timet(time(NULL)-86400L, 0));
1325 if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
1326 icalcomponent_set_dtend(fb, icaltime_from_timet(time(NULL)+86400L, 0));
1329 /* Put the freebusy component into the calendar component */
1330 CtdlLogPrintf(CTDL_DEBUG, "Encapsulating\n");
1331 encaps = ical_encapsulate_subcomponent(fb);
1332 if (encaps == NULL) {
1333 icalcomponent_free(fb);
1334 cprintf("%d Internal error: cannot allocate memory.\n",
1335 ERROR + INTERNAL_ERROR);
1336 getroom(&CC->room, hold_rm);
1340 /* Set the method to PUBLISH */
1341 CtdlLogPrintf(CTDL_DEBUG, "Setting method\n");
1342 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1345 CtdlLogPrintf(CTDL_DEBUG, "Serializing\n");
1346 serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1347 icalcomponent_free(encaps); /* Don't need this anymore. */
1349 cprintf("%d Here is the free/busy data:\n", LISTING_FOLLOWS);
1350 if (serialized_request != NULL) {
1351 client_write(serialized_request, strlen(serialized_request));
1352 free(serialized_request);
1356 /* Go back to the room from which we came... */
1357 getroom(&CC->room, hold_rm);
1363 * Backend for ical_getics()
1365 * This is a ForEachMessage() callback function that searches the current room
1366 * for calendar events and adds them each into one big calendar component.
1368 void ical_getics_backend(long msgnum, void *data) {
1369 icalcomponent *encaps, *c;
1370 struct CtdlMessage *msg = NULL;
1371 struct ical_respond_data ird;
1373 encaps = (icalcomponent *)data;
1374 if (encaps == NULL) return;
1376 /* Look for the calendar event... */
1378 msg = CtdlFetchMessage(msgnum, 1);
1379 if (msg == NULL) return;
1380 memset(&ird, 0, sizeof ird);
1381 strcpy(ird.desired_partnum, "_HUNT_");
1382 mime_parser(msg->cm_fields['M'],
1384 *ical_locate_part, /* callback function */
1386 (void *) &ird, /* user data */
1389 CtdlFreeMessage(msg);
1391 if (ird.cal == NULL) return;
1393 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1394 * are responsible for "the_request"'s memory -- it will be freed
1395 * when we free "encaps".
1398 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1399 * in. This will almost never happen.
1401 if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
1402 icalcomponent_add_component(encaps, ird.cal);
1405 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1406 * and other components encapsulated inside, we have to extract them.
1409 for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
1411 c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
1412 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1414 icalcomponent_free(ird.cal);
1421 * Retrieve all of the calendar items in the current room, and output them
1422 * as a single icalendar object.
1424 void ical_getics(void)
1426 icalcomponent *encaps = NULL;
1429 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1430 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1431 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1432 return; /* Not a vCalendar-centric room */
1435 encaps = icalcomponent_new_vcalendar();
1436 if (encaps == NULL) {
1437 CtdlLogPrintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1438 __FILE__, __LINE__);
1439 cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
1443 cprintf("%d one big calendar\n", LISTING_FOLLOWS);
1445 /* Set the Product ID */
1446 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1448 /* Set the Version Number */
1449 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1451 /* Set the method to PUBLISH */
1452 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1454 /* Now go through the room encapsulating all calendar items. */
1455 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1458 ical_getics_backend,
1462 ser = strdup(icalcomponent_as_ical_string(encaps));
1463 client_write(ser, strlen(ser));
1466 icalcomponent_free(encaps); /* Don't need this anymore. */
1472 * Delete all of the calendar items in the current room, and replace them
1473 * with calendar items from a client-supplied data stream.
1475 void ical_putics(void)
1477 char *calstream = NULL;
1481 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1482 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1483 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1484 return; /* Not a vCalendar-centric room */
1487 if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
1488 cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
1492 cprintf("%d Transmit data now\n", SEND_LISTING);
1493 calstream = CtdlReadMessageBody("000", config.c_maxmsglen, NULL, 0, 0);
1494 if (calstream == NULL) {
1498 cal = icalcomponent_new_from_string(calstream);
1502 /* We got our data stream -- now do something with it. */
1504 /* Delete the existing messages in the room, because we are replacing
1505 * the entire calendar with an entire new (or updated) calendar.
1506 * (Careful: this opens an S_ROOMS critical section!)
1508 CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
1510 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1511 * in. This will almost never happen.
1513 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
1514 ical_write_to_cal(NULL, cal);
1517 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1518 * and other components encapsulated inside, we have to extract them.
1521 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1523 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1524 ical_write_to_cal(NULL, c);
1528 icalcomponent_free(cal);
1533 * All Citadel calendar commands from the client come through here.
1535 void cmd_ical(char *argbuf)
1543 extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
1545 /* Allow "test" and "freebusy" subcommands without logging in. */
1547 if (!strcasecmp(subcmd, "test")) {
1548 cprintf("%d This server supports calendaring\n", CIT_OK);
1552 if (!strcasecmp(subcmd, "freebusy")) {
1553 extract_token(who, argbuf, 1, '|', sizeof who);
1558 if (!strcasecmp(subcmd, "sgi")) {
1559 CIT_ICAL->server_generated_invitations =
1560 (extract_int(argbuf, 1) ? 1 : 0) ;
1562 CIT_OK, CIT_ICAL->server_generated_invitations);
1566 if (CtdlAccessCheck(ac_logged_in)) return;
1568 if (!strcasecmp(subcmd, "respond")) {
1569 msgnum = extract_long(argbuf, 1);
1570 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1571 extract_token(action, argbuf, 3, '|', sizeof action);
1572 ical_respond(msgnum, partnum, action);
1576 if (!strcasecmp(subcmd, "handle_rsvp")) {
1577 msgnum = extract_long(argbuf, 1);
1578 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1579 extract_token(action, argbuf, 3, '|', sizeof action);
1580 ical_handle_rsvp(msgnum, partnum, action);
1584 if (!strcasecmp(subcmd, "conflicts")) {
1585 msgnum = extract_long(argbuf, 1);
1586 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1587 ical_conflicts(msgnum, partnum);
1591 if (!strcasecmp(subcmd, "getics")) {
1596 if (!strcasecmp(subcmd, "putics")) {
1601 cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
1607 * We don't know if the calendar room exists so we just create it at login
1609 void ical_create_room(void)
1614 /* Create the calendar room if it doesn't already exist */
1615 create_room(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
1617 /* Set expiration policy to manual; otherwise objects will be lost! */
1618 if (lgetroom(&qr, USERCALENDARROOM)) {
1619 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1622 qr.QRep.expire_mode = EXPIRE_MANUAL;
1623 qr.QRdefaultview = VIEW_CALENDAR; /* 3 = calendar view */
1626 /* Set the view to a calendar view */
1627 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1628 vbuf.v_view = VIEW_CALENDAR;
1629 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1631 /* Create the tasks list room if it doesn't already exist */
1632 create_room(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
1634 /* Set expiration policy to manual; otherwise objects will be lost! */
1635 if (lgetroom(&qr, USERTASKSROOM)) {
1636 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1639 qr.QRep.expire_mode = EXPIRE_MANUAL;
1640 qr.QRdefaultview = VIEW_TASKS;
1643 /* Set the view to a task list view */
1644 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1645 vbuf.v_view = VIEW_TASKS;
1646 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1648 /* Create the notes room if it doesn't already exist */
1649 create_room(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
1651 /* Set expiration policy to manual; otherwise objects will be lost! */
1652 if (lgetroom(&qr, USERNOTESROOM)) {
1653 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1656 qr.QRep.expire_mode = EXPIRE_MANUAL;
1657 qr.QRdefaultview = VIEW_NOTES;
1660 /* Set the view to a notes view */
1661 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1662 vbuf.v_view = VIEW_NOTES;
1663 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1670 * ical_send_out_invitations() is called by ical_saving_vevent() when it
1673 void ical_send_out_invitations(icalcomponent *cal) {
1674 icalcomponent *the_request = NULL;
1675 char *serialized_request = NULL;
1676 icalcomponent *encaps = NULL;
1677 char *request_message_text = NULL;
1678 struct CtdlMessage *msg = NULL;
1679 struct recptypes *valid = NULL;
1680 char attendees_string[SIZ];
1681 int num_attendees = 0;
1682 char this_attendee[256];
1683 icalproperty *attendee = NULL;
1684 char summary_string[SIZ];
1685 icalproperty *summary = NULL;
1689 CtdlLogPrintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
1694 /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
1695 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1696 ical_send_out_invitations(
1697 icalcomponent_get_first_component(
1698 cal, ICAL_VEVENT_COMPONENT
1704 /* Clone the event */
1705 the_request = icalcomponent_new_clone(cal);
1706 if (the_request == NULL) {
1707 CtdlLogPrintf(CTDL_ERR, "ERROR: cannot clone calendar object\n");
1711 /* Extract the summary string -- we'll use it as the
1712 * message subject for the request
1714 strcpy(summary_string, "Meeting request");
1715 summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
1716 if (summary != NULL) {
1717 if (icalproperty_get_summary(summary)) {
1718 strcpy(summary_string,
1719 icalproperty_get_summary(summary) );
1723 /* Determine who the recipients of this message are (the attendees) */
1724 strcpy(attendees_string, "");
1725 for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
1726 if (icalproperty_get_attendee(attendee)) {
1727 safestrncpy(this_attendee, icalproperty_get_attendee(attendee), sizeof this_attendee);
1728 if (!strncasecmp(this_attendee, "MAILTO:", 7)) {
1729 strcpy(this_attendee, &this_attendee[7]);
1731 if (!CtdlIsMe(this_attendee, sizeof this_attendee)) { /* don't send an invitation to myself! */
1732 snprintf(&attendees_string[strlen(attendees_string)],
1733 sizeof(attendees_string) - strlen(attendees_string),
1743 CtdlLogPrintf(CTDL_DEBUG, "<%d> attendees: <%s>\n", num_attendees, attendees_string);
1745 /* If there are no attendees, there are no invitations to send, so...
1746 * don't bother putting one together! Punch out, Maverick!
1748 if (num_attendees == 0) {
1749 icalcomponent_free(the_request);
1753 /* Encapsulate the VEVENT component into a complete VCALENDAR */
1754 encaps = icalcomponent_new_vcalendar();
1755 if (encaps == NULL) {
1756 CtdlLogPrintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1757 __FILE__, __LINE__);
1758 icalcomponent_free(the_request);
1762 /* Set the Product ID */
1763 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1765 /* Set the Version Number */
1766 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1768 /* Set the method to REQUEST */
1769 icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
1771 /* Now make sure all of the DTSTART and DTEND properties are UTC. */
1772 ical_dezonify(the_request);
1774 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1775 * are responsible for "the_request"'s memory -- it will be freed
1776 * when we free "encaps".
1778 icalcomponent_add_component(encaps, the_request);
1781 serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1782 icalcomponent_free(encaps); /* Don't need this anymore. */
1783 if (serialized_request == NULL) return;
1785 reqsize = strlen(serialized_request) + SIZ;
1786 request_message_text = malloc(reqsize);
1787 if (request_message_text != NULL) {
1788 snprintf(request_message_text, reqsize,
1789 "Content-type: text/calendar\r\n\r\n%s\r\n",
1793 msg = CtdlMakeMessage(&CC->user,
1794 "", /* No single recipient here */
1795 "", /* No single recipient here */
1796 CC->room.QRname, 0, FMT_RFC822,
1799 summary_string, /* Use summary for subject */
1801 request_message_text,
1805 valid = validate_recipients(attendees_string, NULL, 0);
1806 CtdlSubmitMsg(msg, valid, "");
1807 CtdlFreeMessage(msg);
1808 free_recipients(valid);
1811 free(serialized_request);
1816 * When a calendar object is being saved, determine whether it's a VEVENT
1817 * and the user saving it is the organizer. If so, send out invitations
1818 * to any listed attendees.
1821 void ical_saving_vevent(icalcomponent *cal) {
1823 icalproperty *organizer = NULL;
1824 char organizer_string[SIZ];
1826 CtdlLogPrintf(CTDL_DEBUG, "ical_saving_vevent() has been called!\n");
1828 /* Don't send out invitations unless the client wants us to. */
1829 if (CIT_ICAL->server_generated_invitations == 0) {
1833 /* Don't send out invitations if we've been asked not to. */
1834 if (CIT_ICAL->avoid_sending_invitations > 0) {
1838 strcpy(organizer_string, "");
1840 * The VEVENT subcomponent is the one we're interested in.
1841 * Send out invitations if, and only if, this user is the Organizer.
1843 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
1844 organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
1845 if (organizer != NULL) {
1846 if (icalproperty_get_organizer(organizer)) {
1847 strcpy(organizer_string,
1848 icalproperty_get_organizer(organizer));
1851 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
1852 strcpy(organizer_string, &organizer_string[7]);
1853 striplt(organizer_string);
1855 * If the user saving the event is listed as the
1856 * organizer, then send out invitations.
1858 if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
1859 ical_send_out_invitations(cal);
1864 /* If the component has subcomponents, recurse through them. */
1865 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1867 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1868 /* Recursively process subcomponent */
1869 ical_saving_vevent(c);
1877 * Back end for ical_obj_beforesave()
1878 * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
1879 * the summary of the event (becomes message subject),
1880 * and the start time (becomes message date/time).
1882 void ical_ctdl_set_exclusive_msgid(char *name, char *filename, char *partnum,
1883 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
1884 char *encoding, void *cbuserdata)
1886 icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
1888 struct icalmessagemod *imm;
1891 imm = (struct icalmessagemod *)cbuserdata;
1893 /* We're only interested in calendar data. */
1894 if ( (strcasecmp(cbtype, "text/calendar"))
1895 && (strcasecmp(cbtype, "application/ics")) ) {
1899 /* Hunt for the UID and drop it in
1900 * the "user data" pointer for the MIME parser. When
1901 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
1904 whole_cal = icalcomponent_new_from_string(content);
1907 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1908 nested_event = icalcomponent_get_first_component(
1909 cal, ICAL_VEVENT_COMPONENT);
1910 if (nested_event != NULL) {
1914 nested_todo = icalcomponent_get_first_component(
1915 cal, ICAL_VTODO_COMPONENT);
1916 if (nested_todo != NULL) {
1923 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
1925 /* If there's no uid we must generate one */
1926 generate_uuid(new_uid);
1927 icalcomponent_add_property(cal, icalproperty_new_uid(new_uid));
1928 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
1931 strcpy(imm->uid, icalproperty_get_comment(p));
1933 p = ical_ctdl_get_subprop(cal, ICAL_SUMMARY_PROPERTY);
1935 strcpy(imm->subject, icalproperty_get_comment(p));
1937 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
1939 imm->dtstart = icaltime_as_timet(icalproperty_get_dtstart(p));
1942 icalcomponent_free(cal);
1943 if (whole_cal != cal) {
1944 icalcomponent_free(whole_cal);
1953 * See if we need to prevent the object from being saved (we don't allow
1954 * MIME types other than text/calendar in "calendar" or "tasks" rooms). Also,
1955 * when saving an event to the calendar, set the message's Citadel exclusive
1956 * message ID to the UID of the object. This causes our replication checker to
1957 * automatically delete any existing instances of the same object. (Isn't
1960 * We also set the message's Subject to the event summary, and the Date/time to
1961 * the event start time.
1963 int ical_obj_beforesave(struct CtdlMessage *msg)
1965 struct icalmessagemod imm;
1967 /* First determine if this is a calendar or tasks room */
1968 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1969 && (CC->room.QRdefaultview != VIEW_TASKS)
1971 return(0); /* Not a vCalendar-centric room */
1974 /* It must be an RFC822 message! */
1975 if (msg->cm_format_type != 4) {
1976 CtdlLogPrintf(CTDL_DEBUG, "Rejecting non-RFC822 message\n");
1977 return(1); /* You tried to save a non-RFC822 message! */
1980 if (msg->cm_fields['M'] == NULL) {
1981 return(1); /* You tried to save a null message! */
1984 memset(&imm, 0, sizeof(struct icalmessagemod));
1986 /* Do all of our lovely back-end parsing */
1987 mime_parser(msg->cm_fields['M'],
1989 *ical_ctdl_set_exclusive_msgid,
1995 if (!IsEmptyStr(imm.uid)) {
1996 if (msg->cm_fields['E'] != NULL) {
1997 free(msg->cm_fields['E']);
1999 msg->cm_fields['E'] = strdup(imm.uid);
2000 CtdlLogPrintf(CTDL_DEBUG, "Saving calendar UID <%s>\n", msg->cm_fields['E']);
2002 if (!IsEmptyStr(imm.subject)) {
2003 if (msg->cm_fields['U'] != NULL) {
2004 free(msg->cm_fields['U']);
2006 msg->cm_fields['U'] = strdup(imm.subject);
2008 if (imm.dtstart > 0) {
2009 if (msg->cm_fields['T'] != NULL) {
2010 free(msg->cm_fields['T']);
2012 msg->cm_fields['T'] = strdup("000000000000000000");
2013 sprintf(msg->cm_fields['T'], "%ld", imm.dtstart);
2021 * Things we need to do after saving a calendar event.
2023 void ical_obj_aftersave_backend(char *name, char *filename, char *partnum,
2024 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2025 char *encoding, void *cbuserdata)
2029 /* We're only interested in calendar items here. */
2030 if ( (strcasecmp(cbtype, "text/calendar"))
2031 && (strcasecmp(cbtype, "application/ics")) ) {
2035 /* Hunt for the UID and drop it in
2036 * the "user data" pointer for the MIME parser. When
2037 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2040 if ( (!strcasecmp(cbtype, "text/calendar"))
2041 || (!strcasecmp(cbtype, "application/ics")) ) {
2042 cal = icalcomponent_new_from_string(content);
2044 ical_saving_vevent(cal);
2045 icalcomponent_free(cal);
2052 * Things we need to do after saving a calendar event.
2053 * (This will start back end tasks such as automatic generation of invitations,
2054 * if such actions are appropriate.)
2056 int ical_obj_aftersave(struct CtdlMessage *msg)
2058 char roomname[ROOMNAMELEN];
2061 * If this isn't the Calendar> room, no further action is necessary.
2064 /* First determine if this is our room */
2065 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
2066 if (strcasecmp(roomname, CC->room.QRname)) {
2067 return(0); /* Not the Calendar room -- don't do anything. */
2070 /* It must be an RFC822 message! */
2071 if (msg->cm_format_type != 4) return(1);
2073 /* Reject null messages */
2074 if (msg->cm_fields['M'] == NULL) return(1);
2076 /* Now recurse through it looking for our icalendar data */
2077 mime_parser(msg->cm_fields['M'],
2079 *ical_obj_aftersave_backend,
2089 void ical_session_startup(void) {
2090 CIT_ICAL = malloc(sizeof(struct cit_ical));
2091 memset(CIT_ICAL, 0, sizeof(struct cit_ical));
2094 void ical_session_shutdown(void) {
2100 * Back end for ical_fixed_output()
2102 void ical_fixed_output_backend(icalcomponent *cal,
2109 p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
2111 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2114 p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
2116 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2119 p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
2121 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2124 /* If the component has attendees, iterate through them. */
2125 for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
2126 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
2127 if (!strncasecmp(buf, "MAILTO:", 7)) {
2129 /* screen name or email address */
2130 strcpy(buf, &buf[7]);
2132 cprintf("%s ", buf);
2137 /* If the component has subcomponents, recurse through them. */
2138 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2140 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2141 /* Recursively process subcomponent */
2142 ical_fixed_output_backend(c, recursion_level+1);
2149 * Function to output vcalendar data as plain text. Nobody uses MSG0
2150 * anymore, so really this is just so we expose the vCard data to the full
2153 void ical_fixed_output(char *ptr, int len) {
2157 stringy_cal = malloc(len + 1);
2158 safestrncpy(stringy_cal, ptr, len + 1);
2159 cal = icalcomponent_new_from_string(stringy_cal);
2167 ical_fixed_output_backend(cal, 0);
2169 /* Free the memory we obtained from libical's constructor */
2170 icalcomponent_free(cal);
2175 void serv_calendar_destroy(void)
2177 icaltimezone_free_builtin_timezones();
2181 * Register this module with the Citadel server.
2183 CTDL_MODULE_INIT(calendar)
2187 CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
2188 CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
2189 CtdlRegisterSessionHook(ical_create_room, EVT_LOGIN);
2190 CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCal commands");
2191 CtdlRegisterSessionHook(ical_session_startup, EVT_START);
2192 CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP);
2193 CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
2194 CtdlRegisterFixedOutputHook("application/ics", ical_fixed_output);
2195 CtdlRegisterCleanupHook(serv_calendar_destroy);
2198 /* return our Subversion id for the Log */