1 // This module implements iCalendar object processing and the Calendar>
2 // room on a Citadel server. It handles iCalendar objects using the
3 // iTIP protocol. See RFCs 2445 and 2446.
5 // Copyright (c) 1987-2024 by the citadel.org team
7 // This program is open source software. Use, duplication, or disclosure
8 // are subject to the terms of the GNU General Public License version 3.
10 #define PRODID "-//Citadel//NONSGML Citadel Calendar//EN"
12 #include "../../ctdl_module.h"
13 #include <libical/ical.h>
14 #include "../../msgbase.h"
15 #include "../../internet_addressing.h"
16 #include "serv_calendar.h"
17 #include "../../room_ops.h"
18 #include "../../euidindex.h"
19 #include "../../default_timezone.h"
20 #include "../../config.h"
22 struct ical_respond_data {
23 char desired_partnum[SIZ];
28 // Utility function to create a new VCALENDAR component with some of the
29 // required fields already set the way we like them.
30 icalcomponent *icalcomponent_new_citadel_vcalendar(void) {
31 icalcomponent *encaps;
33 encaps = icalcomponent_new_vcalendar();
35 syslog(LOG_ERR, "calendar: could not allocate component");
40 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
42 // Set the Version Number
43 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
49 // Utility function to encapsulate a subcomponent into a full VCALENDAR
50 icalcomponent *ical_encapsulate_subcomponent(icalcomponent *subcomp) {
51 icalcomponent *encaps;
53 // If we're already looking at a full VCALENDAR component, don't bother ... just return itself.
54 if (icalcomponent_isa(subcomp) == ICAL_VCALENDAR_COMPONENT) {
58 // Encapsulate the VEVENT component into a complete VCALENDAR
59 encaps = icalcomponent_new_citadel_vcalendar();
60 if (encaps == NULL) return NULL;
62 // Encapsulate the subcomponent inside
63 icalcomponent_add_component(encaps, subcomp);
65 // Return the object we just created.
70 // Write a calendar object into the specified user's calendar room.
71 // If the supplied user is NULL, this function writes the calendar object
72 // to the currently selected room.
73 void ical_write_to_cal(struct ctdluser *u, icalcomponent *cal) {
76 icalcomponent *encaps = NULL;
77 struct CtdlMessage *msg = NULL;
78 icalcomponent *tmp=NULL;
80 if (cal == NULL) return;
82 // If the supplied object is a subcomponent, encapsulate it in
83 // a full VCALENDAR component, and save that instead.
84 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
85 tmp = icalcomponent_new_clone(cal);
86 encaps = ical_encapsulate_subcomponent(tmp);
87 ical_write_to_cal(u, encaps);
88 icalcomponent_free(tmp);
89 icalcomponent_free(encaps);
93 ser = icalcomponent_as_ical_string_r(cal);
94 if (ser == NULL) return;
98 // If the caller supplied a user, write to that user's default calendar room
100 CtdlWriteObject( // This handy API function does all the work for us.
101 USERCALENDARROOM, // which room
102 "text/calendar", // MIME type
104 serlen + 1, // length
111 // If the caller did not supply a user, write to the currently selected room
113 struct CitContext *CCC = CC;
116 msg = malloc(sizeof(struct CtdlMessage));
117 memset(msg, 0, sizeof(struct CtdlMessage));
118 msg->cm_magic = CTDLMESSAGE_MAGIC;
119 msg->cm_anon_type = MES_NORMAL;
120 msg->cm_format_type = 4;
121 CM_SetField(msg, eAuthor, CCC->user.fullname);
122 CM_SetField(msg, eOriginalRoom, CCC->room.QRname);
124 MsgBody = NewStrBufPlain(NULL, serlen + 100);
125 StrBufAppendBufPlain(MsgBody, HKEY("Content-type: text/calendar\r\n\r\n"), 0);
126 StrBufAppendBufPlain(MsgBody, ser, serlen, 0);
128 CM_SetAsFieldSB(msg, eMessageText, &MsgBody);
130 // Now write the data
131 CtdlSubmitMsg(msg, NULL, "");
135 // In either case, now we can free the serialized calendar object
140 // Send a reply to a meeting invitation.
142 // 'request' is the invitation to reply to.
143 // 'action' is the string "accept" or "decline" or "tentative".
144 void ical_send_a_reply(icalcomponent *request, char *action) {
145 icalcomponent *the_reply = NULL;
146 icalcomponent *vevent = NULL;
147 icalproperty *attendee = NULL;
148 char attendee_string[SIZ];
149 icalproperty *organizer = NULL;
150 char organizer_string[SIZ];
151 icalproperty *summary = NULL;
152 char summary_string[SIZ];
153 icalproperty *me_attend = NULL;
154 struct recptypes *recp = NULL;
155 icalparameter *partstat = NULL;
156 char *serialized_reply = NULL;
157 char *reply_message_text = NULL;
159 struct CtdlMessage *msg = NULL;
160 struct recptypes *valid = NULL;
162 *organizer_string = '\0';
163 strcpy(summary_string, "Calendar item");
165 if (request == NULL) {
166 syslog(LOG_ERR, "calendar: trying to reply to NULL event");
170 the_reply = icalcomponent_new_clone(request);
171 if (the_reply == NULL) {
172 syslog(LOG_ERR, "calendar: cannot clone request");
176 // Change the method from REQUEST to REPLY
177 icalcomponent_set_method(the_reply, ICAL_METHOD_REPLY);
179 vevent = icalcomponent_get_first_component(the_reply, ICAL_VEVENT_COMPONENT);
180 if (vevent != NULL) {
181 // Hunt for attendees, removing ones that aren't us.
182 // (Actually, remove them all, cloning our own one so we can
183 // re-insert it later)
184 while (attendee = icalcomponent_get_first_property(vevent, ICAL_ATTENDEE_PROPERTY), (attendee != NULL)) {
185 ch = icalproperty_get_attendee(attendee);
186 if ((ch != NULL) && !strncasecmp(ch, "MAILTO:", 7)) {
187 safestrncpy(attendee_string, ch + 7, sizeof (attendee_string));
188 string_trim(attendee_string);
189 recp = validate_recipients(attendee_string, NULL, 0);
191 if (!strcasecmp(recp->recp_local, CC->user.fullname)) {
192 if (me_attend) icalproperty_free(me_attend);
193 me_attend = icalproperty_new_clone(attendee);
195 free_recipients(recp);
200 icalcomponent_remove_property(vevent, attendee);
201 icalproperty_free(attendee);
204 // We found our own address in the attendee list.
206 // Change the partstat from NEEDS-ACTION to ACCEPT or DECLINE
207 icalproperty_remove_parameter_by_kind(me_attend, ICAL_PARTSTAT_PARAMETER);
209 if (!strcasecmp(action, "accept")) {
210 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_ACCEPTED);
212 else if (!strcasecmp(action, "decline")) {
213 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_DECLINED);
215 else if (!strcasecmp(action, "tentative")) {
216 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE);
219 if (partstat) icalproperty_add_parameter(me_attend, partstat);
221 // Now insert it back into the vevent.
222 icalcomponent_add_property(vevent, me_attend);
225 // Figure out who to send this thing to
226 organizer = icalcomponent_get_first_property(vevent, ICAL_ORGANIZER_PROPERTY);
227 if (organizer != NULL) {
228 if (icalproperty_get_organizer(organizer)) {
229 strcpy(organizer_string,
230 icalproperty_get_organizer(organizer) );
233 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
234 strcpy(organizer_string, &organizer_string[7]);
235 string_trim(organizer_string);
238 strcpy(organizer_string, "");
241 // Extract the summary string -- we'll use it as the message subject for the reply
242 summary = icalcomponent_get_first_property(vevent, ICAL_SUMMARY_PROPERTY);
243 if (summary != NULL) {
244 if (icalproperty_get_summary(summary)) {
245 strcpy(summary_string,
246 icalproperty_get_summary(summary) );
251 // Now generate the reply message and send it out.
252 serialized_reply = icalcomponent_as_ical_string_r(the_reply);
253 icalcomponent_free(the_reply); // don't need this anymore
254 if (serialized_reply == NULL) return;
256 reply_message_text = malloc(strlen(serialized_reply) + SIZ);
257 if (reply_message_text != NULL) {
258 sprintf(reply_message_text,
259 "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
263 msg = CtdlMakeMessage(&CC->user,
264 organizer_string, // to
271 summary_string, // Use the event SUMMARY as the message subject
278 valid = validate_recipients(organizer_string, NULL, 0);
279 CtdlSubmitMsg(msg, valid, "");
281 free_recipients(valid);
284 free(serialized_reply);
288 // Callback function for mime parser that hunts for calendar content types
289 // and turns them into calendar objects. If something is found, it is placed
290 // in ird->cal, and the caller now owns that memory and is responsible for freeing it.
291 void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
292 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
293 char *cbid, void *cbuserdata) {
295 struct ical_respond_data *ird = NULL;
297 ird = (struct ical_respond_data *) cbuserdata;
299 // desired_partnum can be set to "_HUNT_" to have it just look for
300 // the first part with a content type of text/calendar. Otherwise
301 // we have to only process the right one.
302 if (strcasecmp(ird->desired_partnum, "_HUNT_")) {
303 if (strcasecmp(partnum, ird->desired_partnum)) {
308 if ( (strcasecmp(cbtype, "text/calendar"))
309 && (strcasecmp(cbtype, "application/ics"))
314 if (ird->cal != NULL) {
315 icalcomponent_free(ird->cal);
319 ird->cal = icalcomponent_new_from_string(content);
323 // Respond to a meeting request.
324 void ical_respond(long msgnum, char *partnum, char *action) {
325 struct CtdlMessage *msg = NULL;
326 struct ical_respond_data ird;
329 (strcasecmp(action, "accept"))
330 && (strcasecmp(action, "decline"))
332 cprintf("%d Action must be 'accept' or 'decline'\n", ERROR + ILLEGAL_VALUE);
336 msg = CtdlFetchMessage(msgnum, 1);
338 cprintf("%d Message %ld not found.\n", ERROR + ILLEGAL_VALUE, (long)msgnum);
342 memset(&ird, 0, sizeof ird);
343 strcpy(ird.desired_partnum, partnum);
344 mime_parser(CM_RANGE(msg, eMessageText),
345 *ical_locate_part, // callback function
348 (void *) &ird, // user data
352 // We're done with the incoming message, because we now have a * calendar object in memory.
355 // Here is the real meat of this function. Handle the event.
356 if (ird.cal != NULL) {
357 // Save this in the user's calendar if necessary
358 if (!strcasecmp(action, "accept")) {
359 ical_write_to_cal(&CC->user, ird.cal);
362 // Send a reply if necessary
363 if (icalcomponent_get_method(ird.cal) == ICAL_METHOD_REQUEST) {
364 ical_send_a_reply(ird.cal, action);
367 // We used to delete the invitation after handling it.
368 // We don't do that anymore, but here is the code that handled it:
369 // CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
371 // Free the memory we allocated and return a response.
372 icalcomponent_free(ird.cal);
374 cprintf("%d ok\n", CIT_OK);
378 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
382 // should never get here
386 // Figure out the UID of the calendar event being referred to in a
387 // REPLY object. This function is recursive.
388 void ical_learn_uid_of_reply(char *uidbuf, icalcomponent *cal) {
389 icalcomponent *subcomponent;
392 // If this object is a REPLY, then extract the UID.
393 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
394 p = icalcomponent_get_first_property(cal, ICAL_UID_PROPERTY);
396 strcpy(uidbuf, icalproperty_get_comment(p));
400 // Otherwise, recurse through any VEVENT subcomponents. We do NOT want the
401 // UID of the reply; we want the UID of the invitation being replied to.
402 for (subcomponent = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
403 subcomponent != NULL;
404 subcomponent = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT)
406 ical_learn_uid_of_reply(uidbuf, subcomponent);
411 // ical_update_my_calendar_with_reply() refers to this callback function; when we
412 // locate the message containing the calendar event we're replying to, this function
413 // gets called. It basically just sticks the message number in a supplied buffer.
414 void ical_hunt_for_event_to_update(long msgnum, void *data) {
417 msgnumptr = (long *) data;
422 struct original_event_container {
426 // Callback function for mime parser that hunts for calendar content types
427 // and turns them into calendar objects (called by ical_update_my_calendar_with_reply()
428 // to fetch the object being updated)
429 void ical_locate_original_event(char *name, char *filename, char *partnum, char *disp,
430 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
431 char *cbid, void *cbuserdata) {
433 struct original_event_container *oec = NULL;
435 if ( (strcasecmp(cbtype, "text/calendar"))
436 && (strcasecmp(cbtype, "application/ics"))
440 oec = (struct original_event_container *) cbuserdata;
441 if (oec->c != NULL) {
442 icalcomponent_free(oec->c);
444 oec->c = icalcomponent_new_from_string(content);
448 // Merge updated attendee information from a REPLY into an existing event.
449 void ical_merge_attendee_reply(icalcomponent *event, icalcomponent *reply) {
451 icalproperty *e_attendee, *r_attendee;
453 // First things first. If we're not looking at a VEVENT component,
454 // recurse through subcomponents until we find one.
455 if (icalcomponent_isa(event) != ICAL_VEVENT_COMPONENT) {
456 for (c = icalcomponent_get_first_component(event, ICAL_VEVENT_COMPONENT);
458 c = icalcomponent_get_next_component(event, ICAL_VEVENT_COMPONENT)
460 ical_merge_attendee_reply(c, reply);
465 // Now do the same thing with the reply.
466 if (icalcomponent_isa(reply) != ICAL_VEVENT_COMPONENT) {
467 for (c = icalcomponent_get_first_component(reply, ICAL_VEVENT_COMPONENT);
469 c = icalcomponent_get_next_component(reply, ICAL_VEVENT_COMPONENT)
471 ical_merge_attendee_reply(event, c);
476 // Clone the reply, because we're going to rip its guts out.
477 reply = icalcomponent_new_clone(reply);
479 // At this point we're looking at the correct subcomponents.
480 // Iterate through the attendees looking for a match.
482 for (e_attendee = icalcomponent_get_first_property(event, ICAL_ATTENDEE_PROPERTY);
484 e_attendee = icalcomponent_get_next_property(event, ICAL_ATTENDEE_PROPERTY)) {
486 for (r_attendee = icalcomponent_get_first_property(reply, ICAL_ATTENDEE_PROPERTY);
488 r_attendee = icalcomponent_get_next_property(reply, ICAL_ATTENDEE_PROPERTY)) {
490 // Check to see if these two attendees match...
492 e = icalproperty_get_attendee(e_attendee);
493 r = icalproperty_get_attendee(r_attendee);
495 if ((e != NULL) && (r != NULL) && !strcasecmp(e, r)) {
496 // ...and if they do, remove the attendee from the event
497 // and replace it with the attendee from the reply. (The
498 // reply's copy will have the same address, but an updated
500 icalcomponent_remove_property(event, e_attendee);
501 icalproperty_free(e_attendee);
502 icalcomponent_remove_property(reply, r_attendee);
503 icalcomponent_add_property(event, r_attendee);
505 // Since we diddled both sets of attendees, we have to start
506 // the iteration over again. This will not create an infinite
507 // loop because we removed the attendee from the reply. (That's
508 // why we cloned the reply, and that's what we mean by "ripping
516 // Free the *clone* of the reply.
517 icalcomponent_free(reply);
521 // Handle an incoming RSVP (object with method==ICAL_METHOD_REPLY) for a
522 // calendar event. The object has already been deserialized for us; all
523 // we have to do here is hunt for the event in our calendar, merge in the
524 // updated attendee status, and save it again.
526 // This function returns 0 on success, 1 if the event was not found in the
527 // user's calendar, or 2 if an internal error occurred.
528 int ical_update_my_calendar_with_reply(icalcomponent *cal) {
530 char hold_rm[ROOMNAMELEN];
531 long msgnum_being_replaced = 0;
532 struct CtdlMessage *msg = NULL;
533 struct original_event_container oec;
534 icalcomponent *original_event;
535 char *serialized_event = NULL;
536 char roomname[ROOMNAMELEN];
537 char *message_text = NULL;
539 // Figure out just what event it is we're dealing with
540 strcpy(uid, "--==<< InVaLiD uId >>==--");
541 ical_learn_uid_of_reply(uid, cal);
542 syslog(LOG_DEBUG, "calendar: UID of event being replied to is <%s>", uid);
544 strcpy(hold_rm, CC->room.QRname); // save current room
546 if (CtdlGetRoom(&CC->room, USERCALENDARROOM) != 0) {
547 CtdlGetRoom(&CC->room, hold_rm);
548 syslog(LOG_ERR, "calendar: cannot get user calendar room");
552 // Look in the EUID index for a message with
553 // the Citadel EUID set to the value we're looking for. Since
554 // Citadel always sets the message EUID to the iCalendar UID of
555 // the event, this will work.
556 msgnum_being_replaced = CtdlLocateMessageByEuid(uid, &CC->room);
558 CtdlGetRoom(&CC->room, hold_rm); // return to saved room
560 syslog(LOG_DEBUG, "calendar: msgnum_being_replaced == %ld", msgnum_being_replaced);
561 if (msgnum_being_replaced == 0) {
562 return(1); // no calendar event found
565 // Now we know the ID of the message containing the event being updated.
566 // We don't actually have to delete it; that'll get taken care of by the
567 // server when we save another event with the same UID. This just gives
568 // us the ability to load the event into memory so we can diddle the attendees.
569 msg = CtdlFetchMessage(msgnum_being_replaced, 1);
571 return(2); // internal error
575 CM_RANGE(msg, eMessageText),
576 *ical_locate_original_event, // callback function
583 original_event = oec.c;
584 if (original_event == NULL) {
585 syslog(LOG_ERR, "calendar: original_component is NULL");
589 // Merge the attendee's updated status into the event
590 ical_merge_attendee_reply(original_event, cal);
593 serialized_event = icalcomponent_as_ical_string_r(original_event);
594 icalcomponent_free(original_event); // Don't need this anymore.
595 if (serialized_event == NULL) return(2);
597 CtdlMailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
599 message_text = malloc(strlen(serialized_event) + SIZ);
600 if (message_text != NULL) {
601 sprintf(message_text,
602 "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
606 msg = CtdlMakeMessage(&CC->user,
621 CIT_ICAL->avoid_sending_invitations = 1;
622 CtdlSubmitMsg(msg, NULL, roomname);
624 CIT_ICAL->avoid_sending_invitations = 0;
627 free(serialized_event);
632 // Handle an incoming RSVP for an event. (This is the server subcommand part; it
633 // simply extracts the calendar object from the message, deserializes it, and
634 // passes it up to ical_update_my_calendar_with_reply() for processing.
635 void ical_handle_rsvp(long msgnum, char *partnum, char *action) {
636 struct CtdlMessage *msg = NULL;
637 struct ical_respond_data ird;
641 (strcasecmp(action, "update"))
642 && (strcasecmp(action, "ignore"))
644 cprintf("%d Action must be 'update' or 'ignore'\n", ERROR + ILLEGAL_VALUE);
648 msg = CtdlFetchMessage(msgnum, 1);
650 cprintf("%d Message %ld not found.\n",
651 ERROR + ILLEGAL_VALUE,
657 memset(&ird, 0, sizeof ird);
658 strcpy(ird.desired_partnum, partnum);
660 CM_RANGE(msg, eMessageText),
661 *ical_locate_part, // callback function
664 (void *) &ird, // user data
668 // We're done with the incoming message, because we now have a
669 // calendar object in memory.
672 // Here is the real meat of this function. Handle the event.
673 if (ird.cal != NULL) {
674 // Update the user's calendar if necessary
675 if (!strcasecmp(action, "update")) {
676 ret = ical_update_my_calendar_with_reply(ird.cal);
678 cprintf("%d Your calendar has been updated with this reply.\n", CIT_OK);
681 cprintf("%d This event does not exist in your calendar.\n", ERROR + FILE_NOT_FOUND);
684 cprintf("%d An internal error occurred.\n", ERROR + INTERNAL_ERROR);
688 cprintf("%d This reply has been ignored.\n", CIT_OK);
691 // Now that we've processed this message, we don't need it
692 // anymore. So delete it. (Don't do this anymore.)
693 // CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
695 // Free the memory we allocated and return a response.
696 icalcomponent_free(ird.cal);
701 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
705 // should never get here
709 // Search for a property in both the top level and in a VEVENT subcomponent
710 icalproperty *ical_ctdl_get_subprop(
712 icalproperty_kind which_prop
717 p = icalcomponent_get_first_property(cal, which_prop);
719 c = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
721 p = icalcomponent_get_first_property(c, which_prop);
728 // Check to see if two events overlap. Returns nonzero if they do.
729 // (This function is used in both Citadel and WebCit. If you change it in
730 // one place, change it in the other. Better yet, put it in a library.)
731 int ical_ctdl_is_overlap(
732 struct icaltimetype t1start,
733 struct icaltimetype t1end,
734 struct icaltimetype t2start,
735 struct icaltimetype t2end
737 if (icaltime_is_null_time(t1start)) return(0);
738 if (icaltime_is_null_time(t2start)) return(0);
740 // if either event lacks end time, assume end = start
741 if (icaltime_is_null_time(t1end)) {
742 memcpy(&t1end, &t1start, sizeof(struct icaltimetype));
745 if (t1end.is_date && icaltime_compare(t1start, t1end)) {
747 // the end date is non-inclusive so adjust it by one
748 // day because our test is inclusive, note that a day is
749 // not too much because we are talking about all day
751 // if start = end we assume that nevertheless the whole
754 icaltime_adjust(&t1end, -1, 0, 0, 0);
758 if (icaltime_is_null_time(t2end))
759 memcpy(&t2end, &t2start, sizeof(struct icaltimetype));
761 if (t2end.is_date && icaltime_compare(t2start, t2end)) {
762 icaltime_adjust(&t2end, -1, 0, 0, 0);
766 /* First, check for all-day events */
767 if (t1start.is_date || t2start.is_date) {
768 /* If event 1 ends before event 2 starts, we're in the clear. */
769 if (icaltime_compare_date_only(t1end, t2start) < 0) return(0);
771 /* If event 2 ends before event 1 starts, we're also ok. */
772 if (icaltime_compare_date_only(t2end, t1start) < 0) return(0);
777 /* syslog(LOG_DEBUG, "Comparing t1start %d:%d t1end %d:%d t2start %d:%d t2end %d:%d",
778 t1start.hour, t1start.minute, t1end.hour, t1end.minute,
779 t2start.hour, t2start.minute, t2end.hour, t2end.minute);
782 /* Now check for overlaps using date *and* time. */
784 /* If event 1 ends before event 2 starts, we're in the clear. */
785 if (icaltime_compare(t1end, t2start) <= 0) return(0);
786 /* syslog(LOG_DEBUG, "calendar: first passed"); */
788 /* If event 2 ends before event 1 starts, we're also ok. */
789 if (icaltime_compare(t2end, t1start) <= 0) return(0);
790 /* syslog(LOG_DEBUG, "calendar: second passed"); */
792 /* Otherwise, they overlap. */
798 * Phase 6 of "hunt for conflicts"
799 * called by ical_conflicts_phase5()
801 * Now both the proposed and existing events have been boiled down to start and end times.
802 * Check for overlap and output any conflicts.
804 * Returns nonzero if a conflict was reported. This allows the caller to stop iterating.
806 int ical_conflicts_phase6(struct icaltimetype t1start,
807 struct icaltimetype t1end,
808 struct icaltimetype t2start,
809 struct icaltimetype t2end,
810 long existing_msgnum,
811 char *conflict_event_uid,
812 char *conflict_event_summary,
815 int conflict_reported = 0;
819 // tt = icaltime_as_timet_with_zone(t1start, t1start.zone);
820 // syslog(LOG_DEBUG, "PROPOSED START: %s", ctime(&tt));
821 // tt = icaltime_as_timet_with_zone(t1end, t1end.zone);
822 // syslog(LOG_DEBUG, " PROPOSED END: %s", ctime(&tt));
823 // tt = icaltime_as_timet_with_zone(t2start, t2start.zone);
824 // syslog(LOG_DEBUG, "EXISTING START: %s", ctime(&tt));
825 // tt = icaltime_as_timet_with_zone(t2end, t2end.zone);
826 // syslog(LOG_DEBUG, " EXISTING END: %s", ctime(&tt));
829 /* compare and output */
831 if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
832 cprintf("%ld||%s|%s|%d|\n",
835 conflict_event_summary,
836 ( (!IsEmptyStr(compare_uid)
837 &&(!strcasecmp(compare_uid,
838 conflict_event_uid))) ? 1 : 0
841 conflict_reported = 1;
844 return(conflict_reported);
848 // Phase 5 of "hunt for conflicts"
849 // Called by ical_conflicts_phase4()
851 // We have the proposed event boiled down to start and end times.
852 // Now check it against an existing event.
853 void ical_conflicts_phase5(struct icaltimetype t1start,
854 struct icaltimetype t1end,
855 icalcomponent *existing_event,
856 long existing_msgnum,
859 char conflict_event_uid[SIZ];
860 char conflict_event_summary[SIZ];
861 struct icaltimetype t2start, t2end;
864 /* recur variables */
865 icalproperty *rrule = NULL;
866 struct icalrecurrencetype recur;
867 icalrecur_iterator *ritr = NULL;
868 struct icaldurationtype dur;
872 strcpy(conflict_event_uid, "");
873 strcpy(conflict_event_summary, "");
874 t2start = icaltime_null_time();
875 t2end = icaltime_null_time();
877 /* existing event stuff */
878 p = ical_ctdl_get_subprop(existing_event, ICAL_DTSTART_PROPERTY);
879 if (p == NULL) return;
880 if (p != NULL) t2start = icalproperty_get_dtstart(p);
881 if (icaltime_is_utc(t2start)) {
882 t2start.zone = icaltimezone_get_utc_timezone();
885 t2start.zone = icalcomponent_get_timezone(existing_event,
886 icalparameter_get_tzid(
887 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
891 t2start.zone = get_default_icaltimezone();
895 p = ical_ctdl_get_subprop(existing_event, ICAL_DTEND_PROPERTY);
897 t2end = icalproperty_get_dtend(p);
899 if (icaltime_is_utc(t2end)) {
900 t2end.zone = icaltimezone_get_utc_timezone();
903 t2end.zone = icalcomponent_get_timezone(existing_event,
904 icalparameter_get_tzid(icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER))
907 t2end.zone = get_default_icaltimezone();
910 dur = icaltime_subtract(t2end, t2start);
913 memset (&dur, 0, sizeof(struct icaldurationtype));
916 rrule = ical_ctdl_get_subprop(existing_event, ICAL_RRULE_PROPERTY);
918 recur = icalproperty_get_rrule(rrule);
919 ritr = icalrecur_iterator_new(recur, t2start);
923 p = ical_ctdl_get_subprop(existing_event, ICAL_UID_PROPERTY);
925 strcpy(conflict_event_uid, icalproperty_get_comment(p));
928 p = ical_ctdl_get_subprop(existing_event, ICAL_SUMMARY_PROPERTY);
930 strcpy(conflict_event_summary, icalproperty_get_comment(p));
933 if (ical_conflicts_phase6(t1start, t1end, t2start, t2end,
934 existing_msgnum, conflict_event_uid, conflict_event_summary, compare_uid))
936 num_recur = MAX_RECUR + 1; /* force it out of scope, no need to continue */
940 t2start = icalrecur_iterator_next(ritr);
941 if (!icaltime_is_null_time(t2end)) {
942 const icaltimezone *hold_zone = t2end.zone;
943 t2end = icaltime_add(t2start, dur);
944 t2end.zone = hold_zone;
949 if (icaltime_compare(t2start, t1end) < 0) {
950 num_recur = MAX_RECUR + 1; /* force it out of scope */
953 } while ( (rrule) && (!icaltime_is_null_time(t2start)) && (num_recur < MAX_RECUR) );
954 icalrecur_iterator_free(ritr);
959 * Phase 4 of "hunt for conflicts"
960 * Called by ical_hunt_for_conflicts_backend()
962 * At this point we've got it boiled down to two icalcomponent events in memory.
963 * If they conflict, output something to the client.
965 void ical_conflicts_phase4(icalcomponent *proposed_event,
966 icalcomponent *existing_event,
967 long existing_msgnum)
969 struct icaltimetype t1start, t1end;
971 char compare_uid[SIZ];
973 /* recur variables */
974 icalproperty *rrule = NULL;
975 struct icalrecurrencetype recur;
976 icalrecur_iterator *ritr = NULL;
977 struct icaldurationtype dur;
981 t1end = icaltime_null_time();
984 /* proposed event stuff */
986 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTSTART_PROPERTY);
990 t1start = icalproperty_get_dtstart(p);
992 if (icaltime_is_utc(t1start)) {
993 t1start.zone = icaltimezone_get_utc_timezone();
996 t1start.zone = icalcomponent_get_timezone(proposed_event,
997 icalparameter_get_tzid(
998 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1001 if (!t1start.zone) {
1002 t1start.zone = get_default_icaltimezone();
1006 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTEND_PROPERTY);
1008 t1end = icalproperty_get_dtend(p);
1010 if (icaltime_is_utc(t1end)) {
1011 t1end.zone = icaltimezone_get_utc_timezone();
1014 t1end.zone = icalcomponent_get_timezone(proposed_event,
1015 icalparameter_get_tzid(
1016 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1020 t1end.zone = get_default_icaltimezone();
1024 dur = icaltime_subtract(t1end, t1start);
1027 memset (&dur, 0, sizeof(struct icaldurationtype));
1030 rrule = ical_ctdl_get_subprop(proposed_event, ICAL_RRULE_PROPERTY);
1032 recur = icalproperty_get_rrule(rrule);
1033 ritr = icalrecur_iterator_new(recur, t1start);
1036 p = ical_ctdl_get_subprop(proposed_event, ICAL_UID_PROPERTY);
1038 strcpy(compare_uid, icalproperty_get_comment(p));
1042 ical_conflicts_phase5(t1start, t1end, existing_event, existing_msgnum, compare_uid);
1045 t1start = icalrecur_iterator_next(ritr);
1046 if (!icaltime_is_null_time(t1end)) {
1047 const icaltimezone *hold_zone = t1end.zone;
1048 t1end = icaltime_add(t1start, dur);
1049 t1end.zone = hold_zone;
1054 } while ( (rrule) && (!icaltime_is_null_time(t1start)) && (num_recur < MAX_RECUR) );
1055 icalrecur_iterator_free(ritr);
1060 * Phase 3 of "hunt for conflicts"
1061 * Called by ical_hunt_for_conflicts()
1063 void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
1064 icalcomponent *proposed_event;
1065 struct CtdlMessage *msg = NULL;
1066 struct ical_respond_data ird;
1068 proposed_event = (icalcomponent *)data;
1070 msg = CtdlFetchMessage(msgnum, 1);
1071 if (msg == NULL) return;
1072 memset(&ird, 0, sizeof ird);
1073 strcpy(ird.desired_partnum, "_HUNT_");
1074 mime_parser(CM_RANGE(msg, eMessageText),
1075 *ical_locate_part, // callback function
1078 (void *) &ird, // user data
1083 if (ird.cal == NULL) return;
1085 ical_conflicts_phase4(proposed_event, ird.cal, msgnum);
1086 icalcomponent_free(ird.cal);
1091 * Phase 2 of "hunt for conflicts" operation.
1092 * At this point we have a calendar object which represents the VEVENT that
1093 * is proposed for addition to the calendar. Now hunt through the user's
1094 * calendar room, and output zero or more existing VEVENTs which conflict
1097 void ical_hunt_for_conflicts(icalcomponent *cal) {
1098 char hold_rm[ROOMNAMELEN];
1100 strcpy(hold_rm, CC->room.QRname); /* save current room */
1102 if (CtdlGetRoom(&CC->room, USERCALENDARROOM) != 0) {
1103 CtdlGetRoom(&CC->room, hold_rm);
1104 cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
1108 cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
1110 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1113 ical_hunt_for_conflicts_backend,
1118 CtdlGetRoom(&CC->room, hold_rm); /* return to saved room */
1124 * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
1126 void ical_conflicts(long msgnum, char *partnum) {
1127 struct CtdlMessage *msg = NULL;
1128 struct ical_respond_data ird;
1130 msg = CtdlFetchMessage(msgnum, 1);
1132 cprintf("%d Message %ld not found\n",
1133 ERROR + ILLEGAL_VALUE,
1139 memset(&ird, 0, sizeof ird);
1140 strcpy(ird.desired_partnum, partnum);
1141 mime_parser(CM_RANGE(msg, eMessageText),
1142 *ical_locate_part, /* callback function */
1144 (void *) &ird, /* user data */
1150 if (ird.cal != NULL) {
1151 ical_hunt_for_conflicts(ird.cal);
1152 icalcomponent_free(ird.cal);
1156 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
1161 * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
1163 * fb The VFREEBUSY component to which we are appending
1164 * top_level_cal The top-level VCALENDAR component which contains a VEVENT to be added
1166 void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
1170 struct icalperiodtype this_event_period = icalperiodtype_null_period();
1171 icaltimetype dtstart;
1174 /* recur variables */
1175 icalproperty *rrule = NULL;
1176 struct icalrecurrencetype recur;
1177 icalrecur_iterator *ritr = NULL;
1178 struct icaldurationtype dur;
1181 if (!top_level_cal) return;
1183 /* Find the VEVENT component containing an event */
1184 cal = icalcomponent_get_first_component(top_level_cal, ICAL_VEVENT_COMPONENT);
1187 /* If this event is not opaque, the user isn't publishing it as
1188 * busy time, so don't bother doing anything else.
1190 p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
1192 v = icalproperty_get_value(p);
1194 if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
1201 * Now begin calculating the event start and end times.
1203 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
1205 dtstart = icalproperty_get_dtstart(p);
1207 if (icaltime_is_utc(dtstart)) {
1208 dtstart.zone = icaltimezone_get_utc_timezone();
1211 dtstart.zone = icalcomponent_get_timezone(top_level_cal,
1212 icalparameter_get_tzid(
1213 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1216 if (!dtstart.zone) {
1217 dtstart.zone = get_default_icaltimezone();
1221 dtend = icalcomponent_get_dtend(cal);
1222 if (!icaltime_is_null_time(dtend)) {
1223 dur = icaltime_subtract(dtend, dtstart);
1226 memset (&dur, 0, sizeof(struct icaldurationtype));
1229 /* Is a recurrence specified? If so, get ready to process it... */
1230 rrule = ical_ctdl_get_subprop(cal, ICAL_RRULE_PROPERTY);
1232 recur = icalproperty_get_rrule(rrule);
1233 ritr = icalrecur_iterator_new(recur, dtstart);
1237 /* Convert the DTSTART and DTEND properties to an icalperiod. */
1238 this_event_period.start = dtstart;
1240 if (!icaltime_is_null_time(dtend)) {
1241 this_event_period.end = dtend;
1244 /* Convert the timestamps to UTC. It's ok to do this because we've already expanded
1245 * recurrences and this data is never going to get used again.
1247 this_event_period.start = icaltime_convert_to_zone(
1248 this_event_period.start,
1249 icaltimezone_get_utc_timezone()
1251 this_event_period.end = icaltime_convert_to_zone(
1252 this_event_period.end,
1253 icaltimezone_get_utc_timezone()
1257 icalcomponent_add_property(fb, icalproperty_new_freebusy(this_event_period));
1259 /* Make sure the DTSTART property of the freebusy *list* is set to
1260 * the DTSTART property of the *earliest event*.
1262 p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
1264 icalcomponent_set_dtstart(fb, this_event_period.start);
1267 if (icaltime_compare(this_event_period.start, icalcomponent_get_dtstart(fb)) < 0) {
1268 icalcomponent_set_dtstart(fb, this_event_period.start);
1272 /* Make sure the DTEND property of the freebusy *list* is set to
1273 * the DTEND property of the *latest event*.
1275 p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
1277 icalcomponent_set_dtend(fb, this_event_period.end);
1280 if (icaltime_compare(this_event_period.end, icalcomponent_get_dtend(fb)) > 0) {
1281 icalcomponent_set_dtend(fb, this_event_period.end);
1286 dtstart = icalrecur_iterator_next(ritr);
1287 if (!icaltime_is_null_time(dtend)) {
1288 dtend = icaltime_add(dtstart, dur);
1289 dtend.zone = dtstart.zone;
1294 } while ( (rrule) && (!icaltime_is_null_time(dtstart)) && (num_recur < MAX_RECUR) ) ;
1295 icalrecur_iterator_free(ritr);
1300 * Backend for ical_freebusy()
1302 * This function simply loads the messages in the user's calendar room,
1303 * which contain VEVENTs, then strips them of all non-freebusy data, and
1304 * adds them to the supplied VCALENDAR.
1307 void ical_freebusy_backend(long msgnum, void *data) {
1309 struct CtdlMessage *msg = NULL;
1310 struct ical_respond_data ird;
1312 fb = (icalcomponent *)data; /* User-supplied data will be the VFREEBUSY component */
1314 msg = CtdlFetchMessage(msgnum, 1);
1315 if (msg == NULL) return;
1316 memset(&ird, 0, sizeof ird);
1317 strcpy(ird.desired_partnum, "_HUNT_");
1318 mime_parser(CM_RANGE(msg, eMessageText),
1319 *ical_locate_part, /* callback function */
1321 (void *) &ird, /* user data */
1327 ical_add_to_freebusy(fb, ird.cal); /* Add VEVENT times to VFREEBUSY */
1328 icalcomponent_free(ird.cal);
1334 * Grab another user's free/busy times
1336 void ical_freebusy(char *who) {
1337 struct ctdluser usbuf;
1338 char calendar_room_name[ROOMNAMELEN];
1339 char hold_rm[ROOMNAMELEN];
1340 char *serialized_request = NULL;
1341 icalcomponent *encaps = NULL;
1342 icalcomponent *fb = NULL;
1343 int found_user = (-1);
1344 struct recptypes *recp = NULL;
1349 int config_lines = 0;
1351 /* First try an exact match. */
1352 found_user = CtdlGetUser(&usbuf, who);
1354 /* If not found, try it as an unqualified email address. */
1355 if (found_user != 0) {
1357 recp = validate_recipients(buf, NULL, 0);
1358 syslog(LOG_DEBUG, "calendar: trying <%s>", buf);
1360 if (recp->num_local == 1) {
1361 found_user = CtdlGetUser(&usbuf, recp->recp_local);
1363 free_recipients(recp);
1367 /* If still not found, try it as an address qualified with the
1368 * primary FQDN of this Citadel node.
1370 if (found_user != 0) {
1371 snprintf(buf, sizeof buf, "%s@%s", who, CtdlGetConfigStr("c_fqdn"));
1372 syslog(LOG_DEBUG, "calendar: trying <%s>", buf);
1373 recp = validate_recipients(buf, NULL, 0);
1375 if (recp->num_local == 1) {
1376 found_user = CtdlGetUser(&usbuf, recp->recp_local);
1378 free_recipients(recp);
1382 /* Still not found? Try qualifying it with every domain we
1383 * might have addresses in.
1385 if (found_user != 0) {
1386 config_lines = num_tokens(inetcfg, '\n');
1387 for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
1388 extract_token(buf, inetcfg, i, '\n', sizeof buf);
1389 extract_token(host, buf, 0, '|', sizeof host);
1390 extract_token(type, buf, 1, '|', sizeof type);
1392 if ( (!strcasecmp(type, "localhost"))
1393 || (!strcasecmp(type, "directory")) ) {
1394 snprintf(buf, sizeof buf, "%s@%s", who, host);
1395 syslog(LOG_DEBUG, "calendar: trying <%s>", buf);
1396 recp = validate_recipients(buf, NULL, 0);
1398 if (recp->num_local == 1) {
1399 found_user = CtdlGetUser(&usbuf, recp->recp_local);
1401 free_recipients(recp);
1407 if (found_user != 0) {
1408 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
1412 CtdlMailboxName(calendar_room_name, sizeof calendar_room_name,
1413 &usbuf, USERCALENDARROOM);
1415 strcpy(hold_rm, CC->room.QRname); /* save current room */
1417 if (CtdlGetRoom(&CC->room, calendar_room_name) != 0) {
1418 cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
1419 CtdlGetRoom(&CC->room, hold_rm);
1423 /* Create a VFREEBUSY subcomponent */
1424 syslog(LOG_DEBUG, "calendar: creating VFREEBUSY component");
1425 fb = icalcomponent_new_vfreebusy();
1427 cprintf("%d Internal error: cannot allocate memory.\n", ERROR + INTERNAL_ERROR);
1428 CtdlGetRoom(&CC->room, hold_rm);
1432 /* Set the method to PUBLISH */
1433 icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
1435 /* Set the DTSTAMP to right now. */
1436 icalcomponent_set_dtstamp(fb, icaltime_from_timet_with_zone(time(NULL), 0, icaltimezone_get_utc_timezone()));
1438 /* Add the user's email address as ORGANIZER */
1439 sprintf(buf, "MAILTO:%s", who);
1440 if (strchr(buf, '@') == NULL) {
1442 strcat(buf, CtdlGetConfigStr("c_fqdn"));
1444 for (i=0; buf[i]; ++i) {
1445 if (buf[i]==' ') buf[i] = '_';
1447 icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
1449 /* Add busy time from events */
1450 syslog(LOG_DEBUG, "calendar: adding busy time from events");
1451 CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
1453 /* If values for DTSTART and DTEND are still not present, set them
1454 * to yesterday and tomorrow as default values.
1456 if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
1457 icalcomponent_set_dtstart(fb, icaltime_from_timet_with_zone(time(NULL)-86400L, 0, icaltimezone_get_utc_timezone()));
1459 if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
1460 icalcomponent_set_dtend(fb, icaltime_from_timet_with_zone(time(NULL)+86400L, 0, icaltimezone_get_utc_timezone()));
1463 /* Put the freebusy component into the calendar component */
1464 syslog(LOG_DEBUG, "calendar: encapsulating");
1465 encaps = ical_encapsulate_subcomponent(fb);
1466 if (encaps == NULL) {
1467 icalcomponent_free(fb);
1468 cprintf("%d Internal error: cannot allocate memory.\n",
1469 ERROR + INTERNAL_ERROR);
1470 CtdlGetRoom(&CC->room, hold_rm);
1474 /* Set the method to PUBLISH */
1475 syslog(LOG_DEBUG, "calendar: setting method");
1476 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1479 syslog(LOG_DEBUG, "calendar: serializing");
1480 serialized_request = icalcomponent_as_ical_string_r(encaps);
1481 icalcomponent_free(encaps); /* Don't need this anymore. */
1483 cprintf("%d Free/busy for %s\n", LISTING_FOLLOWS, usbuf.fullname);
1484 if (serialized_request != NULL) {
1485 client_write(serialized_request, strlen(serialized_request));
1486 free(serialized_request);
1490 /* Go back to the room from which we came... */
1491 CtdlGetRoom(&CC->room, hold_rm);
1496 * Backend for ical_getics()
1498 * This is a ForEachMessage() callback function that searches the current room
1499 * for calendar events and adds them each into one big calendar component.
1501 void ical_getics_backend(long msgnum, void *data) {
1502 icalcomponent *encaps, *c;
1503 struct CtdlMessage *msg = NULL;
1504 struct ical_respond_data ird;
1506 encaps = (icalcomponent *)data;
1507 if (encaps == NULL) return;
1509 /* Look for the calendar event... */
1511 msg = CtdlFetchMessage(msgnum, 1);
1512 if (msg == NULL) return;
1513 memset(&ird, 0, sizeof ird);
1514 strcpy(ird.desired_partnum, "_HUNT_");
1515 mime_parser(CM_RANGE(msg, eMessageText),
1516 *ical_locate_part, /* callback function */
1518 (void *) &ird, /* user data */
1523 if (ird.cal == NULL) return;
1525 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1526 * are responsible for "the_request"'s memory -- it will be freed
1527 * when we free "encaps".
1530 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1531 * in. This will almost never happen.
1533 if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
1534 icalcomponent_add_component(encaps, ird.cal);
1537 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1538 * and other components encapsulated inside, we have to extract them.
1541 for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
1543 c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
1545 /* For VTIMEZONE components, suppress duplicates of the same tzid */
1547 if (icalcomponent_isa(c) == ICAL_VTIMEZONE_COMPONENT) {
1548 icalproperty *p = icalcomponent_get_first_property(c, ICAL_TZID_PROPERTY);
1550 const char *tzid = icalproperty_get_tzid(p);
1551 if (!icalcomponent_get_timezone(encaps, tzid)) {
1552 icalcomponent_add_component(encaps,
1553 icalcomponent_new_clone(c));
1558 /* All other types of components can go in verbatim */
1560 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1563 icalcomponent_free(ird.cal);
1568 // Retrieve all of the calendar items in the current room, and output them
1569 // as a single icalendar object.
1570 void ical_getics(void) {
1571 icalcomponent *encaps = NULL;
1574 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1575 &&(CC->room.QRdefaultview != VIEW_TASKS)
1577 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1578 return; /* This room does not contain a calendar. */
1581 encaps = icalcomponent_new_vcalendar();
1582 if (encaps == NULL) {
1583 syslog(LOG_ERR, "calendar: could not allocate component!");
1584 cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
1588 cprintf("%d one big calendar\n", LISTING_FOLLOWS);
1590 /* Set the Product ID */
1591 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1593 /* Set the Version Number */
1594 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1596 /* Set the method to PUBLISH */
1597 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1599 /* Now go through the room encapsulating all calendar items. */
1600 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1603 ical_getics_backend,
1607 ser = icalcomponent_as_ical_string_r(encaps);
1608 icalcomponent_free(encaps); /* Don't need this anymore. */
1609 client_write(ser, strlen(ser));
1615 // Helper callback function for ical_putics() to discover which TZID's we need.
1616 // Simply put the tzid name string into a hash table. After the callbacks are
1617 // done we'll go through them and attach the ones that we have.
1618 void ical_putics_grabtzids(icalparameter *param, void *data) {
1619 const char *tzid = icalparameter_get_tzid(param);
1620 HashList *keys = (HashList *) data;
1622 if ( (keys) && (tzid) && (!IsEmptyStr(tzid)) ) {
1623 Put(keys, tzid, strlen(tzid), strdup(tzid), NULL);
1628 // Delete all of the calendar items in the current room, and replace them
1629 // with calendar items from a client-supplied data stream.
1630 void ical_putics(void) {
1631 char *calstream = NULL;
1634 icalcomponent *encaps = NULL;
1635 HashList *tzidlist = NULL;
1641 // Only allow this operation if we're in a room containing a calendar or tasks view
1642 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1643 && (CC->room.QRdefaultview != VIEW_TASKS)
1645 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1649 // Only allow this operation if we have permission to overwrite the existing calendar
1650 if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
1651 cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
1655 cprintf("%d Transmit data now\n", SEND_LISTING);
1656 calstream = CtdlReadMessageBody(HKEY("000"), CtdlGetConfigLong("c_maxmsglen"), NULL, 0);
1657 if (calstream == NULL) {
1661 cal = icalcomponent_new_from_string(calstream);
1664 /* We got our data stream -- now do something with it. */
1666 /* Delete the existing messages in the room, because we are overwriting
1667 * the entire calendar with an entire new (or updated) calendar.
1668 * (Careful: this opens an S_ROOMS critical section!)
1670 CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
1672 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1673 * in. This will almost never happen.
1675 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
1676 ical_write_to_cal(NULL, cal);
1679 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1680 * and other components encapsulated inside, we have to extract them.
1683 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1685 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)
1688 /* Non-VTIMEZONE components each get written as individual messages.
1689 * But we also need to attach the relevant VTIMEZONE components to them.
1691 if ( (icalcomponent_isa(c) != ICAL_VTIMEZONE_COMPONENT)
1692 && (encaps = icalcomponent_new_vcalendar()) ) {
1693 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1694 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1695 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1697 /* Attach any needed timezones here */
1698 tzidlist = NewHash(1, NULL);
1700 icalcomponent_foreach_tzid(c, ical_putics_grabtzids, tzidlist);
1702 HashPos = GetNewHashPos(tzidlist, 0);
1704 while (GetNextHashPos(tzidlist, HashPos, &len, &Key, &Value)) {
1705 syslog(LOG_DEBUG, "calendar: attaching timezone '%s'", (char*) Value);
1706 icaltimezone *t = NULL;
1708 /* First look for a timezone attached to the original calendar */
1709 t = icalcomponent_get_timezone(cal, Value);
1711 /* Try built-in tzdata if the right one wasn't attached */
1713 t = icaltimezone_get_builtin_timezone(Value);
1716 /* I've got a valid timezone to attach. */
1718 icalcomponent_add_component(encaps,
1719 icalcomponent_new_clone(
1720 icaltimezone_get_component(t)
1726 DeleteHashPos(&HashPos);
1727 DeleteHash(&tzidlist);
1729 /* Now attach the component itself (usually a VEVENT or VTODO) */
1730 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1732 /* Write it to the message store */
1733 ical_write_to_cal(NULL, encaps);
1734 icalcomponent_free(encaps);
1739 icalcomponent_free(cal);
1744 * All Citadel calendar commands from the client come through here.
1746 void cmd_ical(char *argbuf) {
1753 extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
1755 /* Allow "test" and "freebusy" subcommands without logging in. */
1757 if (!strcasecmp(subcmd, "test")) {
1758 cprintf("%d This server supports calendaring\n", CIT_OK);
1762 if (!strcasecmp(subcmd, "freebusy")) {
1763 extract_token(who, argbuf, 1, '|', sizeof who);
1768 if (!strcasecmp(subcmd, "sgi")) {
1769 CIT_ICAL->server_generated_invitations = (extract_int(argbuf, 1) ? 1 : 0) ;
1770 cprintf("%d %d\n", CIT_OK, CIT_ICAL->server_generated_invitations);
1774 if (CtdlAccessCheck(ac_logged_in)) return;
1776 if (!strcasecmp(subcmd, "respond")) {
1777 msgnum = extract_long(argbuf, 1);
1778 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1779 extract_token(action, argbuf, 3, '|', sizeof action);
1780 ical_respond(msgnum, partnum, action);
1784 if (!strcasecmp(subcmd, "handle_rsvp")) {
1785 msgnum = extract_long(argbuf, 1);
1786 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1787 extract_token(action, argbuf, 3, '|', sizeof action);
1788 ical_handle_rsvp(msgnum, partnum, action);
1792 if (!strcasecmp(subcmd, "conflicts")) {
1793 msgnum = extract_long(argbuf, 1);
1794 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1795 ical_conflicts(msgnum, partnum);
1799 if (!strcasecmp(subcmd, "getics")) {
1804 if (!strcasecmp(subcmd, "putics")) {
1809 cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
1814 * We don't know if the calendar room exists so we just create it at login
1816 void ical_CtdlCreateRoom(void) {
1820 /* Create the calendar room if it doesn't already exist */
1821 CtdlCreateRoom(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
1823 /* Set expiration policy to manual; otherwise objects will be lost! */
1824 if (CtdlGetRoomLock(&qr, USERCALENDARROOM)) {
1825 syslog(LOG_ERR, "calendar: couldn't get the user calendar room");
1828 qr.QRep.expire_mode = EXPIRE_MANUAL;
1829 qr.QRdefaultview = VIEW_CALENDAR; /* 3 = calendar view */
1830 CtdlPutRoomLock(&qr);
1832 /* Set the view to a calendar view */
1833 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1834 vbuf.v_view = VIEW_CALENDAR;
1835 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1837 /* Create the tasks list room if it doesn't already exist */
1838 CtdlCreateRoom(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
1840 /* Set expiration policy to manual; otherwise objects will be lost! */
1841 if (CtdlGetRoomLock(&qr, USERTASKSROOM)) {
1842 syslog(LOG_ERR, "calendar: couldn't get the user calendar room!");
1845 qr.QRep.expire_mode = EXPIRE_MANUAL;
1846 qr.QRdefaultview = VIEW_TASKS;
1847 CtdlPutRoomLock(&qr);
1849 /* Set the view to a task list view */
1850 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1851 vbuf.v_view = VIEW_TASKS;
1852 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1854 /* Create the notes room if it doesn't already exist */
1855 CtdlCreateRoom(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
1857 /* Set expiration policy to manual; otherwise objects will be lost! */
1858 if (CtdlGetRoomLock(&qr, USERNOTESROOM)) {
1859 syslog(LOG_ERR, "calendar: couldn't get the user calendar room!");
1862 qr.QRep.expire_mode = EXPIRE_MANUAL;
1863 qr.QRdefaultview = VIEW_NOTES;
1864 CtdlPutRoomLock(&qr);
1866 /* Set the view to a notes view */
1867 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1868 vbuf.v_view = VIEW_NOTES;
1869 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1876 * ical_send_out_invitations() is called by ical_saving_vevent() when it finds a VEVENT.
1878 * top_level_cal is the highest available level calendar object.
1879 * cal is the subcomponent containing the VEVENT.
1881 * Note: if you change the encapsulation code here, change it in WebCit's ical_encapsulate_subcomponent()
1883 void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal) {
1884 icalcomponent *the_request = NULL;
1885 char *serialized_request = NULL;
1886 icalcomponent *encaps = NULL;
1887 char *request_message_text = NULL;
1888 struct CtdlMessage *msg = NULL;
1889 struct recptypes *valid = NULL;
1890 char attendees_string[SIZ];
1891 int num_attendees = 0;
1892 char this_attendee[256];
1893 icalproperty *attendee = NULL;
1894 char summary_string[SIZ];
1895 icalproperty *summary = NULL;
1898 struct icaltimetype t;
1899 const icaltimezone *attached_zones[5] = { NULL, NULL, NULL, NULL, NULL };
1901 const icaltimezone *z;
1902 int num_zones_attached = 0;
1903 int zone_already_attached;
1904 icalparameter *tzidp = NULL;
1905 const char *tzidc = NULL;
1908 syslog(LOG_ERR, "calendar: trying to reply to NULL event?");
1912 /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
1913 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1914 ical_send_out_invitations(top_level_cal,
1915 icalcomponent_get_first_component(
1916 cal, ICAL_VEVENT_COMPONENT
1922 /* Clone the event */
1923 the_request = icalcomponent_new_clone(cal);
1924 if (the_request == NULL) {
1925 syslog(LOG_ERR, "calendar: cannot clone calendar object");
1929 /* Extract the summary string -- we'll use it as the
1930 * message subject for the request
1932 strcpy(summary_string, "Meeting request");
1933 summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
1934 if (summary != NULL) {
1935 if (icalproperty_get_summary(summary)) {
1936 strcpy(summary_string,
1937 icalproperty_get_summary(summary) );
1941 /* Determine who the recipients of this message are (the attendees) */
1942 strcpy(attendees_string, "");
1943 for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
1944 const char *ch = icalproperty_get_attendee(attendee);
1945 if ((ch != NULL) && !strncasecmp(ch, "MAILTO:", 7)) {
1946 safestrncpy(this_attendee, ch + 7, sizeof(this_attendee));
1948 if (!CtdlIsMe(this_attendee, sizeof this_attendee)) { /* don't send an invitation to myself! */
1949 snprintf(&attendees_string[strlen(attendees_string)],
1950 sizeof(attendees_string) - strlen(attendees_string),
1959 syslog(LOG_DEBUG, "calendar: <%d> attendees: <%s>", num_attendees, attendees_string);
1961 /* If there are no attendees, there are no invitations to send, so...
1962 * don't bother putting one together! Punch out, Maverick!
1964 if (num_attendees == 0) {
1965 icalcomponent_free(the_request);
1969 /* Encapsulate the VEVENT component into a complete VCALENDAR */
1970 encaps = icalcomponent_new_vcalendar();
1971 if (encaps == NULL) {
1972 syslog(LOG_ERR, "calendar: could not allocate component!");
1973 icalcomponent_free(the_request);
1977 /* Set the Product ID */
1978 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1980 /* Set the Version Number */
1981 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1983 /* Set the method to REQUEST */
1984 icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
1986 /* Look for properties containing timezone parameters, to see if we need to attach VTIMEZONEs */
1987 for (p = icalcomponent_get_first_property(the_request, ICAL_ANY_PROPERTY);
1989 p = icalcomponent_get_next_property(the_request, ICAL_ANY_PROPERTY))
1991 if ( (icalproperty_isa(p) == ICAL_COMPLETED_PROPERTY)
1992 || (icalproperty_isa(p) == ICAL_CREATED_PROPERTY)
1993 || (icalproperty_isa(p) == ICAL_DATEMAX_PROPERTY)
1994 || (icalproperty_isa(p) == ICAL_DATEMIN_PROPERTY)
1995 || (icalproperty_isa(p) == ICAL_DTEND_PROPERTY)
1996 || (icalproperty_isa(p) == ICAL_DTSTAMP_PROPERTY)
1997 || (icalproperty_isa(p) == ICAL_DTSTART_PROPERTY)
1998 || (icalproperty_isa(p) == ICAL_DUE_PROPERTY)
1999 || (icalproperty_isa(p) == ICAL_EXDATE_PROPERTY)
2000 || (icalproperty_isa(p) == ICAL_LASTMODIFIED_PROPERTY)
2001 || (icalproperty_isa(p) == ICAL_MAXDATE_PROPERTY)
2002 || (icalproperty_isa(p) == ICAL_MINDATE_PROPERTY)
2003 || (icalproperty_isa(p) == ICAL_RECURRENCEID_PROPERTY)
2005 t = icalproperty_get_dtstart(p); // it's safe to use dtstart for all of them
2007 /* Determine the tzid in order for some of the conditions below to work */
2008 tzidp = icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER);
2010 tzidc = icalparameter_get_tzid(tzidp);
2016 /* First see if there's a timezone attached to the data structure itself */
2017 if (icaltime_is_utc(t)) {
2018 z = icaltimezone_get_utc_timezone();
2021 z = icaltime_get_timezone(t);
2024 /* If not, try to determine the tzid from the parameter using attached zones */
2025 if ((!z) && (tzidc)) {
2026 z = icalcomponent_get_timezone(top_level_cal, tzidc);
2029 /* Still no good? Try our internal database */
2030 if ((!z) && (tzidc)) {
2031 z = icaltimezone_get_builtin_timezone_from_tzid(tzidc);
2035 /* We have a valid timezone. Good. Now we need to attach it. */
2037 zone_already_attached = 0;
2038 for (i=0; i<5; ++i) {
2039 if (z == attached_zones[i]) {
2040 /* We've already got this one, no need to attach another. */
2041 ++zone_already_attached;
2044 if ((!zone_already_attached) && (num_zones_attached < 5)) {
2045 /* This is a new one, so attach it. */
2046 attached_zones[num_zones_attached++] = z;
2049 icalproperty_set_parameter(p, icalparameter_new_tzid(icaltimezone_get_tzid(z))
2055 /* Encapsulate any timezones we need */
2056 if (num_zones_attached > 0) for (i=0; i<num_zones_attached; ++i) {
2058 zc = icalcomponent_new_clone(icaltimezone_get_component(attached_zones[i]));
2059 icalcomponent_add_component(encaps, zc);
2062 /* Here we go: encapsulate the VEVENT into the VCALENDAR. We now no longer
2063 * are responsible for "the_request"'s memory -- it will be freed
2064 * when we free "encaps".
2066 icalcomponent_add_component(encaps, the_request);
2069 serialized_request = icalcomponent_as_ical_string_r(encaps);
2070 icalcomponent_free(encaps); /* Don't need this anymore. */
2071 if (serialized_request == NULL) return;
2073 reqsize = strlen(serialized_request) + SIZ;
2074 request_message_text = malloc(reqsize);
2075 if (request_message_text != NULL) {
2076 snprintf(request_message_text, reqsize,
2077 "Content-type: text/calendar\r\n\r\n%s\r\n",
2081 msg = CtdlMakeMessage(
2083 NULL, /* No single recipient here */
2084 NULL, /* No single recipient here */
2090 summary_string, /* Use summary for subject */
2092 request_message_text,
2097 valid = validate_recipients(attendees_string, NULL, 0);
2098 CtdlSubmitMsg(msg, valid, "");
2100 free_recipients(valid);
2103 free(serialized_request);
2108 * When a calendar object is being saved, determine whether it's a VEVENT
2109 * and the user saving it is the organizer. If so, send out invitations
2110 * to any listed attendees.
2112 * This function is recursive. The caller can simply supply the same object
2113 * as both arguments. When it recurses it will alter the second argument
2114 * while holding on to the top level object. This allows us to go back and
2115 * grab things like time zones which might be attached.
2118 void ical_saving_vevent(icalcomponent *top_level_cal, icalcomponent *cal) {
2120 icalproperty *organizer = NULL;
2121 char organizer_string[SIZ];
2123 syslog(LOG_DEBUG, "calendar: ical_saving_vevent() has been called");
2125 /* Don't send out invitations unless the client wants us to. */
2126 if (CIT_ICAL->server_generated_invitations == 0) {
2130 /* Don't send out invitations if we've been asked not to. */
2131 if (CIT_ICAL->avoid_sending_invitations > 0) {
2135 strcpy(organizer_string, "");
2137 * The VEVENT subcomponent is the one we're interested in.
2138 * Send out invitations if, and only if, this user is the Organizer.
2140 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
2141 organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
2142 if (organizer != NULL) {
2143 if (icalproperty_get_organizer(organizer)) {
2144 strcpy(organizer_string,
2145 icalproperty_get_organizer(organizer));
2148 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
2149 strcpy(organizer_string, &organizer_string[7]);
2150 string_trim(organizer_string);
2152 * If the user saving the event is listed as the
2153 * organizer, then send out invitations.
2155 if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
2156 ical_send_out_invitations(top_level_cal, cal);
2161 /* If the component has subcomponents, recurse through them. */
2162 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2164 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2165 /* Recursively process subcomponent */
2166 ical_saving_vevent(top_level_cal, c);
2173 * Back end for ical_obj_beforesave()
2174 * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
2175 * the summary of the event (becomes message subject),
2176 * and the start time (becomes message date/time).
2178 void ical_obj_beforesave_backend(char *name, char *filename, char *partnum,
2179 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2180 char *encoding, char *cbid, void *cbuserdata)
2183 icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
2185 char new_uid[256] = "";
2186 struct CtdlMessage *msg = (struct CtdlMessage *) cbuserdata;
2190 /* We're only interested in calendar data. */
2191 if ( (strcasecmp(cbtype, "text/calendar"))
2192 && (strcasecmp(cbtype, "application/ics")) ) {
2196 /* Hunt for the UID and drop it in
2197 * the "user data" pointer for the MIME parser. When
2198 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2201 whole_cal = icalcomponent_new_from_string(content);
2204 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
2205 nested_event = icalcomponent_get_first_component(
2206 cal, ICAL_VEVENT_COMPONENT);
2207 if (nested_event != NULL) {
2211 nested_todo = icalcomponent_get_first_component(
2212 cal, ICAL_VTODO_COMPONENT);
2213 if (nested_todo != NULL) {
2221 /* Set the message EUID to the iCalendar UID */
2223 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2225 /* If there's no uid we must generate one */
2226 generate_uuid(new_uid);
2227 icalcomponent_add_property(cal, icalproperty_new_uid(new_uid));
2228 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2231 pch = icalproperty_get_comment(p);
2232 if (!IsEmptyStr(pch)) {
2233 CM_SetField(msg, eExclusiveID, pch);
2234 syslog(LOG_DEBUG, "calendar: saving calendar UID <%s>", pch);
2238 /* Set the message subject to the iCalendar summary */
2240 p = ical_ctdl_get_subprop(cal, ICAL_SUMMARY_PROPERTY);
2242 pch = icalproperty_get_comment(p);
2243 if (!IsEmptyStr(pch)) {
2246 subj = rfc2047encode(pch, strlen(pch));
2247 CM_SetAsField(msg, eMsgSubject, &subj, strlen(subj));
2251 /* Set the message date/time to the iCalendar start time */
2253 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
2256 idtstart = icaltime_as_timet(icalproperty_get_dtstart(p));
2258 CM_SetFieldLONG(msg, eTimestamp, idtstart);
2263 icalcomponent_free(cal);
2264 if (whole_cal != cal) {
2265 icalcomponent_free(whole_cal);
2272 * See if we need to prevent the object from being saved (we don't allow
2273 * MIME types other than text/calendar in "calendar" or "tasks" rooms).
2275 * If the message is being saved, we also set various message header fields
2276 * using data found in the iCalendar object.
2278 int ical_obj_beforesave(struct CtdlMessage *msg, struct recptypes *recp) {
2279 /* First determine if this is a calendar or tasks room */
2280 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
2281 && (CC->room.QRdefaultview != VIEW_TASKS)
2283 return(0); /* Not an iCalendar-centric room */
2286 /* It must be an RFC822 message! */
2287 if (msg->cm_format_type != 4) {
2288 syslog(LOG_DEBUG, "calendar: rejecting non-RFC822 message");
2289 return(1); /* You tried to save a non-RFC822 message! */
2292 if (CM_IsEmpty(msg, eMessageText)) {
2293 return(1); /* You tried to save a null message! */
2296 /* Do all of our lovely back-end parsing */
2297 mime_parser(CM_RANGE(msg, eMessageText),
2298 *ical_obj_beforesave_backend,
2309 * Things we need to do after saving a calendar event.
2311 void ical_obj_aftersave_backend(char *name, char *filename, char *partnum,
2312 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2313 char *encoding, char *cbid, void *cbuserdata)
2317 /* We're only interested in calendar items here. */
2318 if ( (strcasecmp(cbtype, "text/calendar"))
2319 && (strcasecmp(cbtype, "application/ics")) ) {
2323 /* Hunt for the UID and drop it in
2324 * the "user data" pointer for the MIME parser. When
2325 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2328 if ( (!strcasecmp(cbtype, "text/calendar"))
2329 || (!strcasecmp(cbtype, "application/ics")) ) {
2330 cal = icalcomponent_new_from_string(content);
2332 ical_saving_vevent(cal, cal);
2333 icalcomponent_free(cal);
2340 * Things we need to do after saving a calendar event.
2341 * (This will start back end tasks such as automatic generation of invitations,
2342 * if such actions are appropriate.)
2344 int ical_obj_aftersave(struct CtdlMessage *msg, struct recptypes *recp) {
2345 char roomname[ROOMNAMELEN];
2348 * If this isn't the Calendar> room, no further action is necessary.
2351 /* First determine if this is our room */
2352 CtdlMailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
2353 if (strcasecmp(roomname, CC->room.QRname)) {
2354 return(0); /* Not the Calendar room -- don't do anything. */
2357 // It must be an RFC822 message!
2358 if (msg->cm_format_type != 4) return(1);
2360 // Reject null messages
2361 if (CM_IsEmpty(msg, eMessageText)) return(1);
2363 // Now recurse through it looking for our icalendar data
2364 mime_parser(CM_RANGE(msg, eMessageText),
2365 *ical_obj_aftersave_backend,
2375 void ical_session_startup(void) {
2376 CIT_ICAL = malloc(sizeof(struct cit_ical));
2377 memset(CIT_ICAL, 0, sizeof(struct cit_ical));
2381 void ical_session_shutdown(void) {
2386 // Back end for ical_fixed_output()
2387 void ical_fixed_output_backend(icalcomponent *cal, int recursion_level) {
2393 p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
2395 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2398 p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
2400 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2403 p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
2405 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2408 // If the component has attendees, iterate through them.
2409 for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
2410 ch = icalproperty_get_attendee(p);
2412 !strncasecmp(ch, "MAILTO:", 7)) {
2414 // screen name or email address
2415 safestrncpy(buf, ch + 7, sizeof(buf));
2417 cprintf("%s ", buf);
2422 // If the component has subcomponents, recurse through them.
2423 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2425 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2426 // Recursively process subcomponent
2427 ical_fixed_output_backend(c, recursion_level+1);
2432 // Function to output iCalendar data as plain text. Nobody uses MSG0
2433 // anymore, so really this is just so we expose the vCard data to the full
2435 void ical_fixed_output(char *ptr, int len) {
2439 stringy_cal = malloc(len + 1);
2440 safestrncpy(stringy_cal, ptr, len + 1);
2441 cal = icalcomponent_new_from_string(stringy_cal);
2448 ical_fixed_output_backend(cal, 0);
2450 // Free the memory we obtained from libical's constructor
2451 icalcomponent_free(cal);
2455 // Initialization function, called from modules_init.c
2456 char *ctdl_module_init_calendar(void) {
2459 // Tell libical to return errors instead of aborting if it gets bad data.
2460 // If this library call is not found, you need to upgrade libical.
2461 icalerror_set_errors_are_fatal(0);
2463 // Use our own application prefix in tzid's generated from system tzdata
2464 icaltimezone_set_tzid_prefix("/citadel.org/");
2466 // Initialize our hook functions
2467 CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
2468 CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
2469 CtdlRegisterSessionHook(ical_CtdlCreateRoom, EVT_LOGIN, PRIO_LOGIN + 1);
2470 CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCalendar commands");
2471 CtdlRegisterSessionHook(ical_session_startup, EVT_START, PRIO_START + 1);
2472 CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP, PRIO_STOP + 80);
2473 CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
2474 CtdlRegisterFixedOutputHook("application/ics", ical_fixed_output);
2477 // return our module name for the log