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>
24 #include "citserver.h"
31 #include "mime_parser.h"
32 #include "internet_addressing.h"
33 #include "serv_calendar.h"
34 #include "euidindex.h"
35 #include "ctdl_module.h"
37 #ifdef CITADEL_WITH_CALENDAR_SERVICE
40 #include "ical_dezonify.h"
44 struct ical_respond_data {
45 char desired_partnum[SIZ];
51 * Utility function to create a new VCALENDAR component with some of the
52 * required fields already set the way we like them.
54 icalcomponent *icalcomponent_new_citadel_vcalendar(void) {
55 icalcomponent *encaps;
57 encaps = icalcomponent_new_vcalendar();
59 lprintf(CTDL_CRIT, "Error at %s:%d - could not allocate component!\n",
64 /* Set the Product ID */
65 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
67 /* Set the Version Number */
68 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
75 * Utility function to encapsulate a subcomponent into a full VCALENDAR
77 icalcomponent *ical_encapsulate_subcomponent(icalcomponent *subcomp) {
78 icalcomponent *encaps;
80 /* If we're already looking at a full VCALENDAR component,
81 * don't bother ... just return itself.
83 if (icalcomponent_isa(subcomp) == ICAL_VCALENDAR_COMPONENT) {
87 /* Encapsulate the VEVENT component into a complete VCALENDAR */
88 encaps = icalcomponent_new_citadel_vcalendar();
89 if (encaps == NULL) return NULL;
91 /* Encapsulate the subcomponent inside */
92 icalcomponent_add_component(encaps, subcomp);
94 /* Convert all timestamps to UTC so we don't have to deal with
95 * stupid VTIMEZONE crap.
97 ical_dezonify(encaps);
99 /* Return the object we just created. */
107 * Write a calendar object into the specified user's calendar room.
108 * If the supplied user is NULL, this function writes the calendar object
109 * to the currently selected room.
111 void ical_write_to_cal(struct ctdluser *u, icalcomponent *cal) {
115 icalcomponent *encaps = NULL;
116 struct CtdlMessage *msg = NULL;
117 icalcomponent *tmp=NULL;
119 if (cal == NULL) return;
121 /* If the supplied object is a subcomponent, encapsulate it in
122 * a full VCALENDAR component, and save that instead.
124 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
125 tmp = icalcomponent_new_clone(cal);
126 encaps = ical_encapsulate_subcomponent(tmp);
127 ical_write_to_cal(u, encaps);
128 icalcomponent_free(tmp);
129 icalcomponent_free(encaps);
133 ser = icalcomponent_as_ical_string(cal);
134 if (ser == NULL) return;
136 /* If the caller supplied a user, write to that user's default calendar room */
138 /* Make a temp file out of it */
139 CtdlMakeTempFileName(temp, sizeof temp);
140 fp = fopen(temp, "w");
142 fwrite(ser, strlen(ser), 1, fp);
145 /* This handy API function does all the work for us. */
146 CtdlWriteObject(USERCALENDARROOM, /* which room */
147 "text/calendar", /* MIME type */
148 temp, /* temp file */
151 0, /* don't delete others of this type */
158 /* If the caller did not supply a user, write to the currently selected room */
160 msg = malloc(sizeof(struct CtdlMessage));
161 memset(msg, 0, sizeof(struct CtdlMessage));
162 msg->cm_magic = CTDLMESSAGE_MAGIC;
163 msg->cm_anon_type = MES_NORMAL;
164 msg->cm_format_type = 4;
165 msg->cm_fields['A'] = strdup(CC->user.fullname);
166 msg->cm_fields['O'] = strdup(CC->room.QRname);
167 msg->cm_fields['N'] = strdup(config.c_nodename);
168 msg->cm_fields['H'] = strdup(config.c_humannode);
169 msg->cm_fields['M'] = malloc(strlen(ser) + 40);
170 strcpy(msg->cm_fields['M'], "Content-type: text/calendar\r\n\r\n");
171 strcat(msg->cm_fields['M'], ser);
173 /* Now write the data */
174 CtdlSubmitMsg(msg, NULL, "");
175 CtdlFreeMessage(msg);
178 /* In either case, now we can free the serialized calendar object */
184 * Add a calendar object to the user's calendar
186 * ok because it uses ical_write_to_cal()
188 void ical_add(icalcomponent *cal, int recursion_level) {
192 * The VEVENT subcomponent is the one we're interested in saving.
194 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
196 ical_write_to_cal(&CC->user, cal);
200 /* If the component has subcomponents, recurse through them. */
201 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
203 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
204 /* Recursively process subcomponent */
205 ical_add(c, recursion_level+1);
213 * Send a reply to a meeting invitation.
215 * 'request' is the invitation to reply to.
216 * 'action' is the string "accept" or "decline" or "tentative".
219 void ical_send_a_reply(icalcomponent *request, char *action) {
220 icalcomponent *the_reply = NULL;
221 icalcomponent *vevent = NULL;
222 icalproperty *attendee = NULL;
223 char attendee_string[SIZ];
224 icalproperty *organizer = NULL;
225 char organizer_string[SIZ];
226 icalproperty *summary = NULL;
227 char summary_string[SIZ];
228 icalproperty *me_attend = NULL;
229 struct recptypes *recp = NULL;
230 icalparameter *partstat = NULL;
231 char *serialized_reply = NULL;
232 char *reply_message_text = NULL;
233 struct CtdlMessage *msg = NULL;
234 struct recptypes *valid = NULL;
236 strcpy(organizer_string, "");
237 strcpy(summary_string, "Calendar item");
239 if (request == NULL) {
240 lprintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
244 the_reply = icalcomponent_new_clone(request);
245 if (the_reply == NULL) {
246 lprintf(CTDL_ERR, "ERROR: cannot clone request\n");
250 /* Change the method from REQUEST to REPLY */
251 icalcomponent_set_method(the_reply, ICAL_METHOD_REPLY);
253 vevent = icalcomponent_get_first_component(the_reply, ICAL_VEVENT_COMPONENT);
254 if (vevent != NULL) {
255 /* Hunt for attendees, removing ones that aren't us.
256 * (Actually, remove them all, cloning our own one so we can
257 * re-insert it later)
259 while (attendee = icalcomponent_get_first_property(vevent,
260 ICAL_ATTENDEE_PROPERTY), (attendee != NULL)
262 if (icalproperty_get_attendee(attendee)) {
263 strcpy(attendee_string,
264 icalproperty_get_attendee(attendee) );
265 if (!strncasecmp(attendee_string, "MAILTO:", 7)) {
266 strcpy(attendee_string, &attendee_string[7]);
267 striplt(attendee_string);
268 recp = validate_recipients(attendee_string);
270 if (!strcasecmp(recp->recp_local, CC->user.fullname)) {
271 if (me_attend) icalproperty_free(me_attend);
272 me_attend = icalproperty_new_clone(attendee);
274 free_recipients(recp);
279 icalcomponent_remove_property(vevent, attendee);
280 icalproperty_free(attendee);
283 /* We found our own address in the attendee list. */
285 /* Change the partstat from NEEDS-ACTION to ACCEPT or DECLINE */
286 icalproperty_remove_parameter(me_attend, ICAL_PARTSTAT_PARAMETER);
288 if (!strcasecmp(action, "accept")) {
289 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_ACCEPTED);
291 else if (!strcasecmp(action, "decline")) {
292 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_DECLINED);
294 else if (!strcasecmp(action, "tentative")) {
295 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE);
298 if (partstat) icalproperty_add_parameter(me_attend, partstat);
300 /* Now insert it back into the vevent. */
301 icalcomponent_add_property(vevent, me_attend);
304 /* Figure out who to send this thing to */
305 organizer = icalcomponent_get_first_property(vevent, ICAL_ORGANIZER_PROPERTY);
306 if (organizer != NULL) {
307 if (icalproperty_get_organizer(organizer)) {
308 strcpy(organizer_string,
309 icalproperty_get_organizer(organizer) );
312 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
313 strcpy(organizer_string, &organizer_string[7]);
314 striplt(organizer_string);
316 strcpy(organizer_string, "");
319 /* Extract the summary string -- we'll use it as the
320 * message subject for the reply
322 summary = icalcomponent_get_first_property(vevent, ICAL_SUMMARY_PROPERTY);
323 if (summary != NULL) {
324 if (icalproperty_get_summary(summary)) {
325 strcpy(summary_string,
326 icalproperty_get_summary(summary) );
331 /* Now generate the reply message and send it out. */
332 serialized_reply = strdup(icalcomponent_as_ical_string(the_reply));
333 icalcomponent_free(the_reply); /* don't need this anymore */
334 if (serialized_reply == NULL) return;
336 reply_message_text = malloc(strlen(serialized_reply) + SIZ);
337 if (reply_message_text != NULL) {
338 sprintf(reply_message_text,
339 "Content-type: text/calendar charset=\"utf-8\"\r\n\r\n%s\r\n",
343 msg = CtdlMakeMessage(&CC->user,
344 organizer_string, /* to */
346 CC->room.QRname, 0, FMT_RFC822,
349 summary_string, /* Use summary for subject */
354 valid = validate_recipients(organizer_string);
355 CtdlSubmitMsg(msg, valid, "");
356 CtdlFreeMessage(msg);
357 free_recipients(valid);
360 free(serialized_reply);
366 * Callback function for mime parser that hunts for calendar content types
367 * and turns them into calendar objects
369 void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
370 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
373 struct ical_respond_data *ird = NULL;
375 ird = (struct ical_respond_data *) cbuserdata;
377 /* desired_partnum can be set to "_HUNT_" to have it just look for
378 * the first part with a content type of text/calendar. Otherwise
379 * we have to only process the right one.
381 if (strcasecmp(ird->desired_partnum, "_HUNT_")) {
382 if (strcasecmp(partnum, ird->desired_partnum)) {
387 if (strcasecmp(cbtype, "text/calendar")) {
391 if (ird->cal != NULL) {
392 icalcomponent_free(ird->cal);
396 ird->cal = icalcomponent_new_from_string(content);
397 if (ird->cal != NULL) {
398 ical_dezonify(ird->cal);
404 * Respond to a meeting request.
406 void ical_respond(long msgnum, char *partnum, char *action) {
407 struct CtdlMessage *msg = NULL;
408 struct ical_respond_data ird;
411 (strcasecmp(action, "accept"))
412 && (strcasecmp(action, "decline"))
414 cprintf("%d Action must be 'accept' or 'decline'\n",
415 ERROR + ILLEGAL_VALUE
420 msg = CtdlFetchMessage(msgnum, 1);
422 cprintf("%d Message %ld not found.\n",
423 ERROR + ILLEGAL_VALUE,
429 memset(&ird, 0, sizeof ird);
430 strcpy(ird.desired_partnum, partnum);
431 mime_parser(msg->cm_fields['M'],
433 *ical_locate_part, /* callback function */
435 (void *) &ird, /* user data */
439 /* We're done with the incoming message, because we now have a
440 * calendar object in memory.
442 CtdlFreeMessage(msg);
445 * Here is the real meat of this function. Handle the event.
447 if (ird.cal != NULL) {
448 /* Save this in the user's calendar if necessary */
449 if (!strcasecmp(action, "accept")) {
450 ical_add(ird.cal, 0);
453 /* Send a reply if necessary */
454 if (icalcomponent_get_method(ird.cal) == ICAL_METHOD_REQUEST) {
455 ical_send_a_reply(ird.cal, action);
458 /* Now that we've processed this message, we don't need it
459 * anymore. So delete it. (NOTE we don't do this anymore.)
460 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
463 /* Free the memory we allocated and return a response. */
464 icalcomponent_free(ird.cal);
466 cprintf("%d ok\n", CIT_OK);
470 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
474 /* should never get here */
479 * Figure out the UID of the calendar event being referred to in a
480 * REPLY object. This function is recursive.
482 void ical_learn_uid_of_reply(char *uidbuf, icalcomponent *cal) {
483 icalcomponent *subcomponent;
486 /* If this object is a REPLY, then extract the UID. */
487 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
488 p = icalcomponent_get_first_property(cal, ICAL_UID_PROPERTY);
490 strcpy(uidbuf, icalproperty_get_comment(p));
494 /* Otherwise, recurse through any VEVENT subcomponents. We do NOT want the
495 * UID of the reply; we want the UID of the invitation being replied to.
497 for (subcomponent = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
498 subcomponent != NULL;
499 subcomponent = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT) ) {
500 ical_learn_uid_of_reply(uidbuf, subcomponent);
506 * ical_update_my_calendar_with_reply() refers to this callback function; when we
507 * locate the message containing the calendar event we're replying to, this function
508 * gets called. It basically just sticks the message number in a supplied buffer.
510 void ical_hunt_for_event_to_update(long msgnum, void *data) {
513 msgnumptr = (long *) data;
518 struct original_event_container {
523 * Callback function for mime parser that hunts for calendar content types
524 * and turns them into calendar objects (called by ical_update_my_calendar_with_reply()
525 * to fetch the object being updated)
527 void ical_locate_original_event(char *name, char *filename, char *partnum, char *disp,
528 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
531 struct original_event_container *oec = NULL;
533 if (strcasecmp(cbtype, "text/calendar")) {
536 oec = (struct original_event_container *) cbuserdata;
537 if (oec->c != NULL) {
538 icalcomponent_free(oec->c);
540 oec->c = icalcomponent_new_from_string(content);
545 * Merge updated attendee information from a REPLY into an existing event.
547 void ical_merge_attendee_reply(icalcomponent *event, icalcomponent *reply) {
549 icalproperty *e_attendee, *r_attendee;
551 /* First things first. If we're not looking at a VEVENT component,
552 * recurse through subcomponents until we find one.
554 if (icalcomponent_isa(event) != ICAL_VEVENT_COMPONENT) {
555 for (c = icalcomponent_get_first_component(event, ICAL_VEVENT_COMPONENT);
557 c = icalcomponent_get_next_component(event, ICAL_VEVENT_COMPONENT) ) {
558 ical_merge_attendee_reply(c, reply);
563 /* Now do the same thing with the reply.
565 if (icalcomponent_isa(reply) != ICAL_VEVENT_COMPONENT) {
566 for (c = icalcomponent_get_first_component(reply, ICAL_VEVENT_COMPONENT);
568 c = icalcomponent_get_next_component(reply, ICAL_VEVENT_COMPONENT) ) {
569 ical_merge_attendee_reply(event, c);
574 /* Clone the reply, because we're going to rip its guts out. */
575 reply = icalcomponent_new_clone(reply);
577 /* At this point we're looking at the correct subcomponents.
578 * Iterate through the attendees looking for a match.
581 for (e_attendee = icalcomponent_get_first_property(event, ICAL_ATTENDEE_PROPERTY);
583 e_attendee = icalcomponent_get_next_property(event, ICAL_ATTENDEE_PROPERTY)) {
585 for (r_attendee = icalcomponent_get_first_property(reply, ICAL_ATTENDEE_PROPERTY);
587 r_attendee = icalcomponent_get_next_property(reply, ICAL_ATTENDEE_PROPERTY)) {
589 /* Check to see if these two attendees match...
592 icalproperty_get_attendee(e_attendee),
593 icalproperty_get_attendee(r_attendee)
595 /* ...and if they do, remove the attendee from the event
596 * and replace it with the attendee from the reply. (The
597 * reply's copy will have the same address, but an updated
600 icalcomponent_remove_property(event, e_attendee);
601 icalproperty_free(e_attendee);
602 icalcomponent_remove_property(reply, r_attendee);
603 icalcomponent_add_property(event, r_attendee);
605 /* Since we diddled both sets of attendees, we have to start
606 * the iteration over again. This will not create an infinite
607 * loop because we removed the attendee from the reply. (That's
608 * why we cloned the reply, and that's what we mean by "ripping
617 /* Free the *clone* of the reply. */
618 icalcomponent_free(reply);
625 * Handle an incoming RSVP (object with method==ICAL_METHOD_REPLY) for a
626 * calendar event. The object has already been deserialized for us; all
627 * we have to do here is hunt for the event in our calendar, merge in the
628 * updated attendee status, and save it again.
630 * This function returns 0 on success, 1 if the event was not found in the
631 * user's calendar, or 2 if an internal error occurred.
633 int ical_update_my_calendar_with_reply(icalcomponent *cal) {
635 char hold_rm[ROOMNAMELEN];
636 long msgnum_being_replaced = 0;
637 struct CtdlMessage *msg = NULL;
638 struct original_event_container oec;
639 icalcomponent *original_event;
640 char *serialized_event = NULL;
641 char roomname[ROOMNAMELEN];
642 char *message_text = NULL;
644 /* Figure out just what event it is we're dealing with */
645 strcpy(uid, "--==<< InVaLiD uId >>==--");
646 ical_learn_uid_of_reply(uid, cal);
647 lprintf(CTDL_DEBUG, "UID of event being replied to is <%s>\n", uid);
649 strcpy(hold_rm, CC->room.QRname); /* save current room */
651 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
652 getroom(&CC->room, hold_rm);
653 lprintf(CTDL_CRIT, "cannot get user calendar room\n");
658 * Look in the EUID index for a message with
659 * the Citadel EUID set to the value we're looking for. Since
660 * Citadel always sets the message EUID to the vCalendar UID of
661 * the event, this will work.
663 msgnum_being_replaced = locate_message_by_euid(uid, &CC->room);
665 getroom(&CC->room, hold_rm); /* return to saved room */
667 lprintf(CTDL_DEBUG, "msgnum_being_replaced == %ld\n", msgnum_being_replaced);
668 if (msgnum_being_replaced == 0) {
669 return(1); /* no calendar event found */
672 /* Now we know the ID of the message containing the event being updated.
673 * We don't actually have to delete it; that'll get taken care of by the
674 * server when we save another event with the same UID. This just gives
675 * us the ability to load the event into memory so we can diddle the
678 msg = CtdlFetchMessage(msgnum_being_replaced, 1);
680 return(2); /* internal error */
683 mime_parser(msg->cm_fields['M'],
685 *ical_locate_original_event, /* callback function */
687 &oec, /* user data */
690 CtdlFreeMessage(msg);
692 original_event = oec.c;
693 if (original_event == NULL) {
694 lprintf(CTDL_ERR, "ERROR: Original_component is NULL.\n");
698 /* Merge the attendee's updated status into the event */
699 ical_merge_attendee_reply(original_event, cal);
702 serialized_event = strdup(icalcomponent_as_ical_string(original_event));
703 icalcomponent_free(original_event); /* Don't need this anymore. */
704 if (serialized_event == NULL) return(2);
706 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
708 message_text = malloc(strlen(serialized_event) + SIZ);
709 if (message_text != NULL) {
710 sprintf(message_text,
711 "Content-type: text/calendar charset=\"utf-8\"\r\n\r\n%s\r\n",
715 msg = CtdlMakeMessage(&CC->user,
716 "", /* No recipient */
717 "", /* 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)) {
867 if (!icaltime_is_null_time(t2end)) {
868 if (!icaltime_compare_date_only(t1start, t2end)) {
874 if (t2start.is_date) {
875 if (!icaltime_compare_date_only(t2start, t1start)) {
878 if (!icaltime_is_null_time(t1end)) {
879 if (!icaltime_compare_date_only(t2start, t1end)) {
885 /* Now check for overlaps using date *and* time. */
887 /* First, bail out if either event 1 or event 2 is missing end time. */
888 if (icaltime_is_null_time(t1end)) return(0);
889 if (icaltime_is_null_time(t2end)) return(0);
891 /* If event 1 ends before event 2 starts, we're in the clear. */
892 if (icaltime_compare(t1end, t2start) <= 0) return(0);
894 /* If event 2 ends before event 1 starts, we're also ok. */
895 if (icaltime_compare(t2end, t1start) <= 0) return(0);
897 /* Otherwise, they overlap. */
904 * Backend for ical_hunt_for_conflicts()
906 void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
908 struct CtdlMessage *msg = NULL;
909 struct ical_respond_data ird;
910 struct icaltimetype t1start, t1end, t2start, t2end;
912 char conflict_event_uid[SIZ];
913 char conflict_event_summary[SIZ];
914 char compare_uid[SIZ];
916 cal = (icalcomponent *)data;
917 strcpy(compare_uid, "");
918 strcpy(conflict_event_uid, "");
919 strcpy(conflict_event_summary, "");
921 msg = CtdlFetchMessage(msgnum, 1);
922 if (msg == NULL) return;
923 memset(&ird, 0, sizeof ird);
924 strcpy(ird.desired_partnum, "_HUNT_");
925 mime_parser(msg->cm_fields['M'],
927 *ical_locate_part, /* callback function */
929 (void *) &ird, /* user data */
932 CtdlFreeMessage(msg);
934 if (ird.cal == NULL) return;
936 t1start = icaltime_null_time();
937 t1end = icaltime_null_time();
938 t2start = icaltime_null_time();
939 t1end = icaltime_null_time();
941 /* Now compare cal to ird.cal */
942 p = ical_ctdl_get_subprop(ird.cal, ICAL_DTSTART_PROPERTY);
943 if (p == NULL) return;
944 if (p != NULL) t2start = icalproperty_get_dtstart(p);
946 p = ical_ctdl_get_subprop(ird.cal, ICAL_DTEND_PROPERTY);
947 if (p != NULL) t2end = icalproperty_get_dtend(p);
949 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
950 if (p == NULL) return;
951 if (p != NULL) t1start = icalproperty_get_dtstart(p);
953 p = ical_ctdl_get_subprop(cal, ICAL_DTEND_PROPERTY);
954 if (p != NULL) t1end = icalproperty_get_dtend(p);
956 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
958 strcpy(compare_uid, icalproperty_get_comment(p));
961 p = ical_ctdl_get_subprop(ird.cal, ICAL_UID_PROPERTY);
963 strcpy(conflict_event_uid, icalproperty_get_comment(p));
966 p = ical_ctdl_get_subprop(ird.cal, ICAL_SUMMARY_PROPERTY);
968 strcpy(conflict_event_summary, icalproperty_get_comment(p));
971 icalcomponent_free(ird.cal);
973 if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
974 cprintf("%ld||%s|%s|%d|\n",
977 conflict_event_summary,
978 ( ((strlen(compare_uid)>0)
979 &&(!strcasecmp(compare_uid,
980 conflict_event_uid))) ? 1 : 0
989 * Phase 2 of "hunt for conflicts" operation.
990 * At this point we have a calendar object which represents the VEVENT that
991 * we're considering adding to the calendar. Now hunt through the user's
992 * calendar room, and output zero or more existing VEVENTs which conflict
995 void ical_hunt_for_conflicts(icalcomponent *cal) {
996 char hold_rm[ROOMNAMELEN];
998 strcpy(hold_rm, CC->room.QRname); /* save current room */
1000 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
1001 getroom(&CC->room, hold_rm);
1002 cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
1006 cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
1008 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1011 ical_hunt_for_conflicts_backend,
1016 getroom(&CC->room, hold_rm); /* return to saved room */
1023 * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
1025 void ical_conflicts(long msgnum, char *partnum) {
1026 struct CtdlMessage *msg = NULL;
1027 struct ical_respond_data ird;
1029 msg = CtdlFetchMessage(msgnum, 1);
1031 cprintf("%d Message %ld not found.\n",
1032 ERROR + ILLEGAL_VALUE,
1038 memset(&ird, 0, sizeof ird);
1039 strcpy(ird.desired_partnum, partnum);
1040 mime_parser(msg->cm_fields['M'],
1042 *ical_locate_part, /* callback function */
1044 (void *) &ird, /* user data */
1048 CtdlFreeMessage(msg);
1050 if (ird.cal != NULL) {
1051 ical_hunt_for_conflicts(ird.cal);
1052 icalcomponent_free(ird.cal);
1056 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
1060 /* should never get here */
1066 * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
1068 void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *cal) {
1071 struct icalperiodtype my_period;
1073 if (cal == NULL) return;
1074 my_period = icalperiodtype_null_period();
1076 if (icalcomponent_isa(cal) != ICAL_VEVENT_COMPONENT) {
1077 ical_add_to_freebusy(fb,
1078 icalcomponent_get_first_component(
1079 cal, ICAL_VEVENT_COMPONENT
1087 /* If this event is not opaque, the user isn't publishing it as
1088 * busy time, so don't bother doing anything else.
1090 p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
1092 v = icalproperty_get_value(p);
1094 if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
1100 /* Convert the DTSTART and DTEND properties to an icalperiod. */
1101 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
1103 my_period.start = icalproperty_get_dtstart(p);
1106 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
1108 my_period.end = icalproperty_get_dtstart(p);
1112 icalcomponent_add_property(fb,
1113 icalproperty_new_freebusy(my_period)
1116 /* Make sure the DTSTART property of the freebusy *list* is set to
1117 * the DTSTART property of the *earliest event*.
1119 p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
1121 icalcomponent_set_dtstart(fb,
1122 icalcomponent_get_dtstart(cal) );
1125 if (icaltime_compare(
1126 icalcomponent_get_dtstart(cal),
1127 icalcomponent_get_dtstart(fb)
1129 icalcomponent_set_dtstart(fb,
1130 icalcomponent_get_dtstart(cal) );
1134 /* Make sure the DTEND property of the freebusy *list* is set to
1135 * the DTEND property of the *latest event*.
1137 p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
1139 icalcomponent_set_dtend(fb,
1140 icalcomponent_get_dtend(cal) );
1143 if (icaltime_compare(
1144 icalcomponent_get_dtend(cal),
1145 icalcomponent_get_dtend(fb)
1147 icalcomponent_set_dtend(fb,
1148 icalcomponent_get_dtend(cal) );
1157 * Backend for ical_freebusy()
1159 * This function simply loads the messages in the user's calendar room,
1160 * which contain VEVENTs, then strips them of all non-freebusy data, and
1161 * adds them to the supplied VCALENDAR.
1164 void ical_freebusy_backend(long msgnum, void *data) {
1166 struct CtdlMessage *msg = NULL;
1167 struct ical_respond_data ird;
1169 cal = (icalcomponent *)data;
1171 msg = CtdlFetchMessage(msgnum, 1);
1172 if (msg == NULL) return;
1173 memset(&ird, 0, sizeof ird);
1174 strcpy(ird.desired_partnum, "_HUNT_");
1175 mime_parser(msg->cm_fields['M'],
1177 *ical_locate_part, /* callback function */
1179 (void *) &ird, /* user data */
1182 CtdlFreeMessage(msg);
1184 if (ird.cal == NULL) return;
1186 ical_add_to_freebusy(cal, ird.cal);
1188 /* Now free the memory. */
1189 icalcomponent_free(ird.cal);
1195 * Grab another user's free/busy times
1197 void ical_freebusy(char *who) {
1198 struct ctdluser usbuf;
1199 char calendar_room_name[ROOMNAMELEN];
1200 char hold_rm[ROOMNAMELEN];
1201 char *serialized_request = NULL;
1202 icalcomponent *encaps = NULL;
1203 icalcomponent *fb = NULL;
1204 int found_user = (-1);
1205 struct recptypes *recp = NULL;
1210 int config_lines = 0;
1212 /* First try an exact match. */
1213 found_user = getuser(&usbuf, who);
1215 /* If not found, try it as an unqualified email address. */
1216 if (found_user != 0) {
1218 recp = validate_recipients(buf);
1219 lprintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1221 if (recp->num_local == 1) {
1222 found_user = getuser(&usbuf, recp->recp_local);
1224 free_recipients(recp);
1228 /* If still not found, try it as an address qualified with the
1229 * primary FQDN of this Citadel node.
1231 if (found_user != 0) {
1232 snprintf(buf, sizeof buf, "%s@%s", who, config.c_fqdn);
1233 lprintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1234 recp = validate_recipients(buf);
1236 if (recp->num_local == 1) {
1237 found_user = getuser(&usbuf, recp->recp_local);
1239 free_recipients(recp);
1243 /* Still not found? Try qualifying it with every domain we
1244 * might have addresses in.
1246 if (found_user != 0) {
1247 config_lines = num_tokens(inetcfg, '\n');
1248 for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
1249 extract_token(buf, inetcfg, i, '\n', sizeof buf);
1250 extract_token(host, buf, 0, '|', sizeof host);
1251 extract_token(type, buf, 1, '|', sizeof type);
1253 if ( (!strcasecmp(type, "localhost"))
1254 || (!strcasecmp(type, "directory")) ) {
1255 snprintf(buf, sizeof buf, "%s@%s", who, host);
1256 lprintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1257 recp = validate_recipients(buf);
1259 if (recp->num_local == 1) {
1260 found_user = getuser(&usbuf, recp->recp_local);
1262 free_recipients(recp);
1268 if (found_user != 0) {
1269 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
1273 MailboxName(calendar_room_name, sizeof calendar_room_name,
1274 &usbuf, USERCALENDARROOM);
1276 strcpy(hold_rm, CC->room.QRname); /* save current room */
1278 if (getroom(&CC->room, calendar_room_name) != 0) {
1279 cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
1280 getroom(&CC->room, hold_rm);
1284 /* Create a VFREEBUSY subcomponent */
1285 lprintf(CTDL_DEBUG, "Creating VFREEBUSY component\n");
1286 fb = icalcomponent_new_vfreebusy();
1288 cprintf("%d Internal error: cannot allocate memory.\n",
1289 ERROR + INTERNAL_ERROR);
1290 icalcomponent_free(encaps);
1291 getroom(&CC->room, hold_rm);
1295 /* Set the method to PUBLISH */
1296 icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
1298 /* Set the DTSTAMP to right now. */
1299 icalcomponent_set_dtstamp(fb, icaltime_from_timet(time(NULL), 0));
1301 /* Add the user's email address as ORGANIZER */
1302 sprintf(buf, "MAILTO:%s", who);
1303 if (strchr(buf, '@') == NULL) {
1305 strcat(buf, config.c_fqdn);
1307 for (i=0; buf[i]; ++i) {
1308 if (buf[i]==' ') buf[i] = '_';
1310 icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
1312 /* Add busy time from events */
1313 lprintf(CTDL_DEBUG, "Adding busy time from events\n");
1314 CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
1316 /* If values for DTSTART and DTEND are still not present, set them
1317 * to yesterday and tomorrow as default values.
1319 if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
1320 icalcomponent_set_dtstart(fb, icaltime_from_timet(time(NULL)-86400L, 0));
1322 if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
1323 icalcomponent_set_dtend(fb, icaltime_from_timet(time(NULL)+86400L, 0));
1326 /* Put the freebusy component into the calendar component */
1327 lprintf(CTDL_DEBUG, "Encapsulating\n");
1328 encaps = ical_encapsulate_subcomponent(fb);
1329 if (encaps == NULL) {
1330 icalcomponent_free(fb);
1331 cprintf("%d Internal error: cannot allocate memory.\n",
1332 ERROR + INTERNAL_ERROR);
1333 getroom(&CC->room, hold_rm);
1337 /* Set the method to PUBLISH */
1338 lprintf(CTDL_DEBUG, "Setting method\n");
1339 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1342 lprintf(CTDL_DEBUG, "Serializing\n");
1343 serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1344 icalcomponent_free(encaps); /* Don't need this anymore. */
1346 cprintf("%d Here is the free/busy data:\n", LISTING_FOLLOWS);
1347 if (serialized_request != NULL) {
1348 client_write(serialized_request, strlen(serialized_request));
1349 free(serialized_request);
1353 /* Go back to the room from which we came... */
1354 getroom(&CC->room, hold_rm);
1360 * Backend for ical_getics()
1362 * This is a ForEachMessage() callback function that searches the current room
1363 * for calendar events and adds them each into one big calendar component.
1365 void ical_getics_backend(long msgnum, void *data) {
1366 icalcomponent *encaps, *c;
1367 struct CtdlMessage *msg = NULL;
1368 struct ical_respond_data ird;
1370 encaps = (icalcomponent *)data;
1371 if (encaps == NULL) return;
1373 /* Look for the calendar event... */
1375 msg = CtdlFetchMessage(msgnum, 1);
1376 if (msg == NULL) return;
1377 memset(&ird, 0, sizeof ird);
1378 strcpy(ird.desired_partnum, "_HUNT_");
1379 mime_parser(msg->cm_fields['M'],
1381 *ical_locate_part, /* callback function */
1383 (void *) &ird, /* user data */
1386 CtdlFreeMessage(msg);
1388 if (ird.cal == NULL) return;
1390 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1391 * are responsible for "the_request"'s memory -- it will be freed
1392 * when we free "encaps".
1395 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1396 * in. This will almost never happen.
1398 if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
1399 icalcomponent_add_component(encaps, ird.cal);
1402 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1403 * and other components encapsulated inside, we have to extract them.
1406 for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
1408 c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
1409 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1411 icalcomponent_free(ird.cal);
1418 * Retrieve all of the calendar items in the current room, and output them
1419 * as a single icalendar object.
1421 void ical_getics(void)
1423 icalcomponent *encaps = NULL;
1426 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1427 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1428 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1429 return; /* Not a vCalendar-centric room */
1432 encaps = icalcomponent_new_vcalendar();
1433 if (encaps == NULL) {
1434 lprintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1435 __FILE__, __LINE__);
1436 cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
1440 cprintf("%d one big calendar\n", LISTING_FOLLOWS);
1442 /* Set the Product ID */
1443 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1445 /* Set the Version Number */
1446 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1448 /* Set the method to PUBLISH */
1449 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1451 /* Now go through the room encapsulating all calendar items. */
1452 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1455 ical_getics_backend,
1459 ser = strdup(icalcomponent_as_ical_string(encaps));
1460 client_write(ser, strlen(ser));
1463 icalcomponent_free(encaps); /* Don't need this anymore. */
1469 * Delete all of the calendar items in the current room, and replace them
1470 * with calendar items from a client-supplied data stream.
1472 void ical_putics(void)
1474 char *calstream = NULL;
1478 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1479 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1480 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1481 return; /* Not a vCalendar-centric room */
1484 if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
1485 cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
1489 cprintf("%d Transmit data now\n", SEND_LISTING);
1490 calstream = CtdlReadMessageBody("000", config.c_maxmsglen, NULL, 0, 0);
1491 if (calstream == NULL) {
1495 cal = icalcomponent_new_from_string(calstream);
1499 /* We got our data stream -- now do something with it. */
1501 /* Delete the existing messages in the room, because we are replacing
1502 * the entire calendar with an entire new (or updated) calendar.
1503 * (Careful: this opens an S_ROOMS critical section!)
1505 CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
1507 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1508 * in. This will almost never happen.
1510 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
1511 ical_write_to_cal(NULL, cal);
1514 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1515 * and other components encapsulated inside, we have to extract them.
1518 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1520 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1521 ical_write_to_cal(NULL, c);
1525 icalcomponent_free(cal);
1530 * All Citadel calendar commands from the client come through here.
1532 void cmd_ical(char *argbuf)
1540 extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
1542 /* Allow "test" and "freebusy" subcommands without logging in. */
1544 if (!strcasecmp(subcmd, "test")) {
1545 cprintf("%d This server supports calendaring\n", CIT_OK);
1549 if (!strcasecmp(subcmd, "freebusy")) {
1550 extract_token(who, argbuf, 1, '|', sizeof who);
1555 if (!strcasecmp(subcmd, "sgi")) {
1556 CIT_ICAL->server_generated_invitations =
1557 (extract_int(argbuf, 1) ? 1 : 0) ;
1559 CIT_OK, CIT_ICAL->server_generated_invitations);
1563 if (CtdlAccessCheck(ac_logged_in)) return;
1565 if (!strcasecmp(subcmd, "respond")) {
1566 msgnum = extract_long(argbuf, 1);
1567 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1568 extract_token(action, argbuf, 3, '|', sizeof action);
1569 ical_respond(msgnum, partnum, action);
1573 if (!strcasecmp(subcmd, "handle_rsvp")) {
1574 msgnum = extract_long(argbuf, 1);
1575 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1576 extract_token(action, argbuf, 3, '|', sizeof action);
1577 ical_handle_rsvp(msgnum, partnum, action);
1581 if (!strcasecmp(subcmd, "conflicts")) {
1582 msgnum = extract_long(argbuf, 1);
1583 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1584 ical_conflicts(msgnum, partnum);
1588 if (!strcasecmp(subcmd, "getics")) {
1593 if (!strcasecmp(subcmd, "putics")) {
1598 cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
1604 * We don't know if the calendar room exists so we just create it at login
1606 void ical_create_room(void)
1611 /* Create the calendar room if it doesn't already exist */
1612 create_room(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
1614 /* Set expiration policy to manual; otherwise objects will be lost! */
1615 if (lgetroom(&qr, USERCALENDARROOM)) {
1616 lprintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1619 qr.QRep.expire_mode = EXPIRE_MANUAL;
1620 qr.QRdefaultview = VIEW_CALENDAR; /* 3 = calendar view */
1623 /* Set the view to a calendar view */
1624 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1625 vbuf.v_view = VIEW_CALENDAR;
1626 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1628 /* Create the tasks list room if it doesn't already exist */
1629 create_room(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
1631 /* Set expiration policy to manual; otherwise objects will be lost! */
1632 if (lgetroom(&qr, USERTASKSROOM)) {
1633 lprintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1636 qr.QRep.expire_mode = EXPIRE_MANUAL;
1637 qr.QRdefaultview = VIEW_TASKS;
1640 /* Set the view to a task list view */
1641 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1642 vbuf.v_view = VIEW_TASKS;
1643 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1645 /* Create the notes room if it doesn't already exist */
1646 create_room(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
1648 /* Set expiration policy to manual; otherwise objects will be lost! */
1649 if (lgetroom(&qr, USERNOTESROOM)) {
1650 lprintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1653 qr.QRep.expire_mode = EXPIRE_MANUAL;
1654 qr.QRdefaultview = VIEW_NOTES;
1657 /* Set the view to a notes view */
1658 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1659 vbuf.v_view = VIEW_NOTES;
1660 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1667 * ical_send_out_invitations() is called by ical_saving_vevent() when it
1670 void ical_send_out_invitations(icalcomponent *cal) {
1671 icalcomponent *the_request = NULL;
1672 char *serialized_request = NULL;
1673 icalcomponent *encaps = NULL;
1674 char *request_message_text = NULL;
1675 struct CtdlMessage *msg = NULL;
1676 struct recptypes *valid = NULL;
1677 char attendees_string[SIZ];
1678 int num_attendees = 0;
1679 char this_attendee[256];
1680 icalproperty *attendee = NULL;
1681 char summary_string[SIZ];
1682 icalproperty *summary = NULL;
1685 lprintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
1690 /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
1691 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1692 ical_send_out_invitations(
1693 icalcomponent_get_first_component(
1694 cal, ICAL_VEVENT_COMPONENT
1700 /* Clone the event */
1701 the_request = icalcomponent_new_clone(cal);
1702 if (the_request == NULL) {
1703 lprintf(CTDL_ERR, "ERROR: cannot clone calendar object\n");
1707 /* Extract the summary string -- we'll use it as the
1708 * message subject for the request
1710 strcpy(summary_string, "Meeting request");
1711 summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
1712 if (summary != NULL) {
1713 if (icalproperty_get_summary(summary)) {
1714 strcpy(summary_string,
1715 icalproperty_get_summary(summary) );
1719 /* Determine who the recipients of this message are (the attendees) */
1720 strcpy(attendees_string, "");
1721 for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
1722 if (icalproperty_get_attendee(attendee)) {
1723 safestrncpy(this_attendee, icalproperty_get_attendee(attendee), sizeof this_attendee);
1724 if (!strncasecmp(this_attendee, "MAILTO:", 7)) {
1725 strcpy(this_attendee, &this_attendee[7]);
1727 if (!CtdlIsMe(this_attendee, sizeof this_attendee)) { /* don't send an invitation to myself! */
1728 snprintf(&attendees_string[strlen(attendees_string)],
1729 sizeof(attendees_string) - strlen(attendees_string),
1739 lprintf(CTDL_DEBUG, "<%d> attendees: <%s>\n", num_attendees, attendees_string);
1741 /* If there are no attendees, there are no invitations to send, so...
1742 * don't bother putting one together! Punch out, Maverick!
1744 if (num_attendees == 0) {
1745 icalcomponent_free(the_request);
1749 /* Encapsulate the VEVENT component into a complete VCALENDAR */
1750 encaps = icalcomponent_new_vcalendar();
1751 if (encaps == NULL) {
1752 lprintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1753 __FILE__, __LINE__);
1754 icalcomponent_free(the_request);
1758 /* Set the Product ID */
1759 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1761 /* Set the Version Number */
1762 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1764 /* Set the method to REQUEST */
1765 icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
1767 /* Now make sure all of the DTSTART and DTEND properties are UTC. */
1768 ical_dezonify(the_request);
1770 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1771 * are responsible for "the_request"'s memory -- it will be freed
1772 * when we free "encaps".
1774 icalcomponent_add_component(encaps, the_request);
1777 serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1778 icalcomponent_free(encaps); /* Don't need this anymore. */
1779 if (serialized_request == NULL) return;
1781 request_message_text = malloc(strlen(serialized_request) + SIZ);
1782 if (request_message_text != NULL) {
1783 sprintf(request_message_text,
1784 "Content-type: text/calendar\r\n\r\n%s\r\n",
1788 msg = CtdlMakeMessage(&CC->user,
1789 "", /* No single recipient here */
1790 "", /* No single recipient here */
1791 CC->room.QRname, 0, FMT_RFC822,
1794 summary_string, /* Use summary for subject */
1796 request_message_text);
1799 valid = validate_recipients(attendees_string);
1800 CtdlSubmitMsg(msg, valid, "");
1801 CtdlFreeMessage(msg);
1802 free_recipients(valid);
1805 free(serialized_request);
1810 * When a calendar object is being saved, determine whether it's a VEVENT
1811 * and the user saving it is the organizer. If so, send out invitations
1812 * to any listed attendees.
1815 void ical_saving_vevent(icalcomponent *cal) {
1817 icalproperty *organizer = NULL;
1818 char organizer_string[SIZ];
1820 lprintf(CTDL_DEBUG, "ical_saving_vevent() has been called!\n");
1822 /* Don't send out invitations unless the client wants us to. */
1823 if (CIT_ICAL->server_generated_invitations == 0) {
1827 /* Don't send out invitations if we've been asked not to. */
1828 if (CIT_ICAL->avoid_sending_invitations > 0) {
1832 strcpy(organizer_string, "");
1834 * The VEVENT subcomponent is the one we're interested in.
1835 * Send out invitations if, and only if, this user is the Organizer.
1837 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
1838 organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
1839 if (organizer != NULL) {
1840 if (icalproperty_get_organizer(organizer)) {
1841 strcpy(organizer_string,
1842 icalproperty_get_organizer(organizer));
1845 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
1846 strcpy(organizer_string, &organizer_string[7]);
1847 striplt(organizer_string);
1849 * If the user saving the event is listed as the
1850 * organizer, then send out invitations.
1852 if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
1853 ical_send_out_invitations(cal);
1858 /* If the component has subcomponents, recurse through them. */
1859 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1861 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1862 /* Recursively process subcomponent */
1863 ical_saving_vevent(c);
1871 * Back end for ical_obj_beforesave()
1872 * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
1873 * the summary of the event (becomes message subject),
1874 * and the start time (becomes message date/time).
1876 void ical_ctdl_set_exclusive_msgid(char *name, char *filename, char *partnum,
1877 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
1878 char *encoding, void *cbuserdata)
1880 icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
1882 struct icalmessagemod *imm;
1885 imm = (struct icalmessagemod *)cbuserdata;
1887 /* We're only interested in calendar data. */
1888 if (strcasecmp(cbtype, "text/calendar")) {
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")) {
2027 /* Hunt for the UID and drop it in
2028 * the "user data" pointer for the MIME parser. When
2029 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2032 if (!strcasecmp(cbtype, "text/calendar")) {
2033 cal = icalcomponent_new_from_string(content);
2035 ical_saving_vevent(cal);
2036 icalcomponent_free(cal);
2043 * Things we need to do after saving a calendar event.
2044 * (This will start back end tasks such as automatic generation of invitations,
2045 * if such actions are appropriate.)
2047 int ical_obj_aftersave(struct CtdlMessage *msg)
2049 char roomname[ROOMNAMELEN];
2052 * If this isn't the Calendar> room, no further action is necessary.
2055 /* First determine if this is our room */
2056 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
2057 if (strcasecmp(roomname, CC->room.QRname)) {
2058 return(0); /* Not the Calendar room -- don't do anything. */
2061 /* It must be an RFC822 message! */
2062 if (msg->cm_format_type != 4) return(1);
2064 /* Reject null messages */
2065 if (msg->cm_fields['M'] == NULL) return(1);
2067 /* Now recurse through it looking for our icalendar data */
2068 mime_parser(msg->cm_fields['M'],
2070 *ical_obj_aftersave_backend,
2080 void ical_session_startup(void) {
2081 CIT_ICAL = malloc(sizeof(struct cit_ical));
2082 memset(CIT_ICAL, 0, sizeof(struct cit_ical));
2085 void ical_session_shutdown(void) {
2091 * Back end for ical_fixed_output()
2093 void ical_fixed_output_backend(icalcomponent *cal,
2100 p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
2102 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2105 p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
2107 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2110 p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
2112 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2115 /* If the component has attendees, iterate through them. */
2116 for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
2117 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
2118 if (!strncasecmp(buf, "MAILTO:", 7)) {
2120 /* screen name or email address */
2121 strcpy(buf, &buf[7]);
2123 cprintf("%s ", buf);
2128 /* If the component has subcomponents, recurse through them. */
2129 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2131 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2132 /* Recursively process subcomponent */
2133 ical_fixed_output_backend(c, recursion_level+1);
2140 * Function to output vcalendar data as plain text. Nobody uses MSG0
2141 * anymore, so really this is just so we expose the vCard data to the full
2144 void ical_fixed_output(char *ptr, int len) {
2148 stringy_cal = malloc(len + 1);
2149 safestrncpy(stringy_cal, ptr, len + 1);
2150 cal = icalcomponent_new_from_string(stringy_cal);
2158 ical_fixed_output_backend(cal, 0);
2160 /* Free the memory we obtained from libical's constructor */
2161 icalcomponent_free(cal);
2165 #endif /* CITADEL_WITH_CALENDAR_SERVICE */
2168 * Register this module with the Citadel server.
2170 CTDL_MODULE_INIT(calendar)
2172 #ifdef CITADEL_WITH_CALENDAR_SERVICE
2173 CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
2174 CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
2175 CtdlRegisterSessionHook(ical_create_room, EVT_LOGIN);
2176 CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCal commands");
2177 CtdlRegisterSessionHook(ical_session_startup, EVT_START);
2178 CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP);
2179 CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
2182 /* return our Subversion id for the Log */
2188 void serv_calendar_destroy(void)
2190 #ifdef CITADEL_WITH_CALENDAR_SERVICE
2191 icaltimezone_free_builtin_timezones();