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>
22 #include <libical/ical.h>
23 #include <libcitadel.h>
26 #include "citserver.h"
32 #include "internet_addressing.h"
33 #include "serv_calendar.h"
34 #include "euidindex.h"
35 #include "ctdl_module.h"
36 #include "ical_dezonify.h"
40 struct ical_respond_data {
41 char desired_partnum[SIZ];
47 * Utility function to create a new VCALENDAR component with some of the
48 * required fields already set the way we like them.
50 icalcomponent *icalcomponent_new_citadel_vcalendar(void) {
51 icalcomponent *encaps;
53 encaps = icalcomponent_new_vcalendar();
55 CtdlLogPrintf(CTDL_CRIT, "ERROR: could not allocate component!\n");
59 /* Set the Product ID */
60 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
62 /* Set the Version Number */
63 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
70 * Utility function to encapsulate a subcomponent into a full VCALENDAR
72 icalcomponent *ical_encapsulate_subcomponent(icalcomponent *subcomp) {
73 icalcomponent *encaps;
75 /* If we're already looking at a full VCALENDAR component,
76 * don't bother ... just return itself.
78 if (icalcomponent_isa(subcomp) == ICAL_VCALENDAR_COMPONENT) {
82 /* Encapsulate the VEVENT component into a complete VCALENDAR */
83 encaps = icalcomponent_new_citadel_vcalendar();
84 if (encaps == NULL) return NULL;
86 /* Encapsulate the subcomponent inside */
87 icalcomponent_add_component(encaps, subcomp);
89 /* Return the object we just created. */
97 * Write a calendar object into the specified user's calendar room.
98 * If the supplied user is NULL, this function writes the calendar object
99 * to the currently selected room.
101 void ical_write_to_cal(struct ctdluser *u, icalcomponent *cal) {
103 icalcomponent *encaps = NULL;
104 struct CtdlMessage *msg = NULL;
105 icalcomponent *tmp=NULL;
107 if (cal == NULL) return;
109 /* If the supplied object is a subcomponent, encapsulate it in
110 * a full VCALENDAR component, and save that instead.
112 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
113 tmp = icalcomponent_new_clone(cal);
114 encaps = ical_encapsulate_subcomponent(tmp);
115 ical_write_to_cal(u, encaps);
116 icalcomponent_free(tmp);
117 icalcomponent_free(encaps);
121 ser = icalcomponent_as_ical_string_r(cal);
122 if (ser == NULL) return;
124 /* If the caller supplied a user, write to that user's default calendar room */
126 /* This handy API function does all the work for us. */
127 CtdlWriteObject(USERCALENDARROOM, /* which room */
128 "text/calendar", /* MIME type */
130 strlen(ser)+1, /* length */
133 0, /* don't delete others of this type */
138 /* If the caller did not supply a user, write to the currently selected room */
140 msg = malloc(sizeof(struct CtdlMessage));
141 memset(msg, 0, sizeof(struct CtdlMessage));
142 msg->cm_magic = CTDLMESSAGE_MAGIC;
143 msg->cm_anon_type = MES_NORMAL;
144 msg->cm_format_type = 4;
145 msg->cm_fields['A'] = strdup(CC->user.fullname);
146 msg->cm_fields['O'] = strdup(CC->room.QRname);
147 msg->cm_fields['N'] = strdup(config.c_nodename);
148 msg->cm_fields['H'] = strdup(config.c_humannode);
149 msg->cm_fields['M'] = malloc(strlen(ser) + 40);
150 strcpy(msg->cm_fields['M'], "Content-type: text/calendar\r\n\r\n");
151 strcat(msg->cm_fields['M'], ser);
153 /* Now write the data */
154 CtdlSubmitMsg(msg, NULL, "", QP_EADDR);
155 CtdlFreeMessage(msg);
158 /* In either case, now we can free the serialized calendar object */
164 * Send a reply to a meeting invitation.
166 * 'request' is the invitation to reply to.
167 * 'action' is the string "accept" or "decline" or "tentative".
170 void ical_send_a_reply(icalcomponent *request, char *action) {
171 icalcomponent *the_reply = NULL;
172 icalcomponent *vevent = NULL;
173 icalproperty *attendee = NULL;
174 char attendee_string[SIZ];
175 icalproperty *organizer = NULL;
176 char organizer_string[SIZ];
177 icalproperty *summary = NULL;
178 char summary_string[SIZ];
179 icalproperty *me_attend = NULL;
180 struct recptypes *recp = NULL;
181 icalparameter *partstat = NULL;
182 char *serialized_reply = NULL;
183 char *reply_message_text = NULL;
184 struct CtdlMessage *msg = NULL;
185 struct recptypes *valid = NULL;
187 strcpy(organizer_string, "");
188 strcpy(summary_string, "Calendar item");
190 if (request == NULL) {
191 CtdlLogPrintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
195 the_reply = icalcomponent_new_clone(request);
196 if (the_reply == NULL) {
197 CtdlLogPrintf(CTDL_ERR, "ERROR: cannot clone request\n");
201 /* Change the method from REQUEST to REPLY */
202 icalcomponent_set_method(the_reply, ICAL_METHOD_REPLY);
204 vevent = icalcomponent_get_first_component(the_reply, ICAL_VEVENT_COMPONENT);
205 if (vevent != NULL) {
206 /* Hunt for attendees, removing ones that aren't us.
207 * (Actually, remove them all, cloning our own one so we can
208 * re-insert it later)
210 while (attendee = icalcomponent_get_first_property(vevent,
211 ICAL_ATTENDEE_PROPERTY), (attendee != NULL)
213 if (icalproperty_get_attendee(attendee)) {
214 strcpy(attendee_string,
215 icalproperty_get_attendee(attendee) );
216 if (!strncasecmp(attendee_string, "MAILTO:", 7)) {
217 strcpy(attendee_string, &attendee_string[7]);
218 striplt(attendee_string);
219 recp = validate_recipients(attendee_string, NULL, 0);
221 if (!strcasecmp(recp->recp_local, CC->user.fullname)) {
222 if (me_attend) icalproperty_free(me_attend);
223 me_attend = icalproperty_new_clone(attendee);
225 free_recipients(recp);
230 icalcomponent_remove_property(vevent, attendee);
231 icalproperty_free(attendee);
234 /* We found our own address in the attendee list. */
236 /* Change the partstat from NEEDS-ACTION to ACCEPT or DECLINE */
237 icalproperty_remove_parameter(me_attend, ICAL_PARTSTAT_PARAMETER);
239 if (!strcasecmp(action, "accept")) {
240 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_ACCEPTED);
242 else if (!strcasecmp(action, "decline")) {
243 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_DECLINED);
245 else if (!strcasecmp(action, "tentative")) {
246 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE);
249 if (partstat) icalproperty_add_parameter(me_attend, partstat);
251 /* Now insert it back into the vevent. */
252 icalcomponent_add_property(vevent, me_attend);
255 /* Figure out who to send this thing to */
256 organizer = icalcomponent_get_first_property(vevent, ICAL_ORGANIZER_PROPERTY);
257 if (organizer != NULL) {
258 if (icalproperty_get_organizer(organizer)) {
259 strcpy(organizer_string,
260 icalproperty_get_organizer(organizer) );
263 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
264 strcpy(organizer_string, &organizer_string[7]);
265 striplt(organizer_string);
267 strcpy(organizer_string, "");
270 /* Extract the summary string -- we'll use it as the
271 * message subject for the reply
273 summary = icalcomponent_get_first_property(vevent, ICAL_SUMMARY_PROPERTY);
274 if (summary != NULL) {
275 if (icalproperty_get_summary(summary)) {
276 strcpy(summary_string,
277 icalproperty_get_summary(summary) );
282 /* Now generate the reply message and send it out. */
283 serialized_reply = icalcomponent_as_ical_string_r(the_reply);
284 icalcomponent_free(the_reply); /* don't need this anymore */
285 if (serialized_reply == NULL) return;
287 reply_message_text = malloc(strlen(serialized_reply) + SIZ);
288 if (reply_message_text != NULL) {
289 sprintf(reply_message_text,
290 "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
294 msg = CtdlMakeMessage(&CC->user,
295 organizer_string, /* to */
297 CC->room.QRname, 0, FMT_RFC822,
300 summary_string, /* Use summary for subject */
306 valid = validate_recipients(organizer_string, NULL, 0);
307 CtdlSubmitMsg(msg, valid, "", QP_EADDR);
308 CtdlFreeMessage(msg);
309 free_recipients(valid);
312 free(serialized_reply);
318 * Callback function for mime parser that hunts for calendar content types
319 * and turns them into calendar objects. If something is found, it is placed
320 * in ird->cal, and the caller now owns that memory and is responsible for freeing it.
322 void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
323 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
324 char *cbid, void *cbuserdata) {
326 struct ical_respond_data *ird = NULL;
328 ird = (struct ical_respond_data *) cbuserdata;
330 /* desired_partnum can be set to "_HUNT_" to have it just look for
331 * the first part with a content type of text/calendar. Otherwise
332 * we have to only process the right one.
334 if (strcasecmp(ird->desired_partnum, "_HUNT_")) {
335 if (strcasecmp(partnum, ird->desired_partnum)) {
340 if ( (strcasecmp(cbtype, "text/calendar"))
341 && (strcasecmp(cbtype, "application/ics")) ) {
345 if (ird->cal != NULL) {
346 icalcomponent_free(ird->cal);
350 ird->cal = icalcomponent_new_from_string(content);
355 * Respond to a meeting request.
357 void ical_respond(long msgnum, char *partnum, char *action) {
358 struct CtdlMessage *msg = NULL;
359 struct ical_respond_data ird;
362 (strcasecmp(action, "accept"))
363 && (strcasecmp(action, "decline"))
365 cprintf("%d Action must be 'accept' or 'decline'\n",
366 ERROR + ILLEGAL_VALUE
371 msg = CtdlFetchMessage(msgnum, 1);
373 cprintf("%d Message %ld not found.\n",
374 ERROR + ILLEGAL_VALUE,
380 memset(&ird, 0, sizeof ird);
381 strcpy(ird.desired_partnum, partnum);
382 mime_parser(msg->cm_fields['M'],
384 *ical_locate_part, /* callback function */
386 (void *) &ird, /* user data */
390 /* We're done with the incoming message, because we now have a
391 * calendar object in memory.
393 CtdlFreeMessage(msg);
396 * Here is the real meat of this function. Handle the event.
398 if (ird.cal != NULL) {
399 /* Save this in the user's calendar if necessary */
400 if (!strcasecmp(action, "accept")) {
401 ical_write_to_cal(&CC->user, ird.cal);
404 /* Send a reply if necessary */
405 if (icalcomponent_get_method(ird.cal) == ICAL_METHOD_REQUEST) {
406 ical_send_a_reply(ird.cal, action);
409 /* We used to delete the invitation after handling it.
410 * We don't do that anymore, but here is the code that handled it:
411 * CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
414 /* Free the memory we allocated and return a response. */
415 icalcomponent_free(ird.cal);
417 cprintf("%d ok\n", CIT_OK);
421 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
425 /* should never get here */
430 * Figure out the UID of the calendar event being referred to in a
431 * REPLY object. This function is recursive.
433 void ical_learn_uid_of_reply(char *uidbuf, icalcomponent *cal) {
434 icalcomponent *subcomponent;
437 /* If this object is a REPLY, then extract the UID. */
438 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
439 p = icalcomponent_get_first_property(cal, ICAL_UID_PROPERTY);
441 strcpy(uidbuf, icalproperty_get_comment(p));
445 /* Otherwise, recurse through any VEVENT subcomponents. We do NOT want the
446 * UID of the reply; we want the UID of the invitation being replied to.
448 for (subcomponent = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
449 subcomponent != NULL;
450 subcomponent = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT) ) {
451 ical_learn_uid_of_reply(uidbuf, subcomponent);
457 * ical_update_my_calendar_with_reply() refers to this callback function; when we
458 * locate the message containing the calendar event we're replying to, this function
459 * gets called. It basically just sticks the message number in a supplied buffer.
461 void ical_hunt_for_event_to_update(long msgnum, void *data) {
464 msgnumptr = (long *) data;
469 struct original_event_container {
474 * Callback function for mime parser that hunts for calendar content types
475 * and turns them into calendar objects (called by ical_update_my_calendar_with_reply()
476 * to fetch the object being updated)
478 void ical_locate_original_event(char *name, char *filename, char *partnum, char *disp,
479 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
480 char *cbid, void *cbuserdata) {
482 struct original_event_container *oec = NULL;
484 if ( (strcasecmp(cbtype, "text/calendar"))
485 && (strcasecmp(cbtype, "application/ics")) ) {
488 oec = (struct original_event_container *) cbuserdata;
489 if (oec->c != NULL) {
490 icalcomponent_free(oec->c);
492 oec->c = icalcomponent_new_from_string(content);
497 * Merge updated attendee information from a REPLY into an existing event.
499 void ical_merge_attendee_reply(icalcomponent *event, icalcomponent *reply) {
501 icalproperty *e_attendee, *r_attendee;
503 /* First things first. If we're not looking at a VEVENT component,
504 * recurse through subcomponents until we find one.
506 if (icalcomponent_isa(event) != ICAL_VEVENT_COMPONENT) {
507 for (c = icalcomponent_get_first_component(event, ICAL_VEVENT_COMPONENT);
509 c = icalcomponent_get_next_component(event, ICAL_VEVENT_COMPONENT) ) {
510 ical_merge_attendee_reply(c, reply);
515 /* Now do the same thing with the reply.
517 if (icalcomponent_isa(reply) != ICAL_VEVENT_COMPONENT) {
518 for (c = icalcomponent_get_first_component(reply, ICAL_VEVENT_COMPONENT);
520 c = icalcomponent_get_next_component(reply, ICAL_VEVENT_COMPONENT) ) {
521 ical_merge_attendee_reply(event, c);
526 /* Clone the reply, because we're going to rip its guts out. */
527 reply = icalcomponent_new_clone(reply);
529 /* At this point we're looking at the correct subcomponents.
530 * Iterate through the attendees looking for a match.
533 for (e_attendee = icalcomponent_get_first_property(event, ICAL_ATTENDEE_PROPERTY);
535 e_attendee = icalcomponent_get_next_property(event, ICAL_ATTENDEE_PROPERTY)) {
537 for (r_attendee = icalcomponent_get_first_property(reply, ICAL_ATTENDEE_PROPERTY);
539 r_attendee = icalcomponent_get_next_property(reply, ICAL_ATTENDEE_PROPERTY)) {
541 /* Check to see if these two attendees match...
544 icalproperty_get_attendee(e_attendee),
545 icalproperty_get_attendee(r_attendee)
547 /* ...and if they do, remove the attendee from the event
548 * and replace it with the attendee from the reply. (The
549 * reply's copy will have the same address, but an updated
552 icalcomponent_remove_property(event, e_attendee);
553 icalproperty_free(e_attendee);
554 icalcomponent_remove_property(reply, r_attendee);
555 icalcomponent_add_property(event, r_attendee);
557 /* Since we diddled both sets of attendees, we have to start
558 * the iteration over again. This will not create an infinite
559 * loop because we removed the attendee from the reply. (That's
560 * why we cloned the reply, and that's what we mean by "ripping
569 /* Free the *clone* of the reply. */
570 icalcomponent_free(reply);
577 * Handle an incoming RSVP (object with method==ICAL_METHOD_REPLY) for a
578 * calendar event. The object has already been deserialized for us; all
579 * we have to do here is hunt for the event in our calendar, merge in the
580 * updated attendee status, and save it again.
582 * This function returns 0 on success, 1 if the event was not found in the
583 * user's calendar, or 2 if an internal error occurred.
585 int ical_update_my_calendar_with_reply(icalcomponent *cal) {
587 char hold_rm[ROOMNAMELEN];
588 long msgnum_being_replaced = 0;
589 struct CtdlMessage *msg = NULL;
590 struct original_event_container oec;
591 icalcomponent *original_event;
592 char *serialized_event = NULL;
593 char roomname[ROOMNAMELEN];
594 char *message_text = NULL;
596 /* Figure out just what event it is we're dealing with */
597 strcpy(uid, "--==<< InVaLiD uId >>==--");
598 ical_learn_uid_of_reply(uid, cal);
599 CtdlLogPrintf(CTDL_DEBUG, "UID of event being replied to is <%s>\n", uid);
601 strcpy(hold_rm, CC->room.QRname); /* save current room */
603 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
604 getroom(&CC->room, hold_rm);
605 CtdlLogPrintf(CTDL_CRIT, "cannot get user calendar room\n");
610 * Look in the EUID index for a message with
611 * the Citadel EUID set to the value we're looking for. Since
612 * Citadel always sets the message EUID to the iCalendar UID of
613 * the event, this will work.
615 msgnum_being_replaced = locate_message_by_euid(uid, &CC->room);
617 getroom(&CC->room, hold_rm); /* return to saved room */
619 CtdlLogPrintf(CTDL_DEBUG, "msgnum_being_replaced == %ld\n", msgnum_being_replaced);
620 if (msgnum_being_replaced == 0) {
621 return(1); /* no calendar event found */
624 /* Now we know the ID of the message containing the event being updated.
625 * We don't actually have to delete it; that'll get taken care of by the
626 * server when we save another event with the same UID. This just gives
627 * us the ability to load the event into memory so we can diddle the
630 msg = CtdlFetchMessage(msgnum_being_replaced, 1);
632 return(2); /* internal error */
635 mime_parser(msg->cm_fields['M'],
637 *ical_locate_original_event, /* callback function */
639 &oec, /* user data */
642 CtdlFreeMessage(msg);
644 original_event = oec.c;
645 if (original_event == NULL) {
646 CtdlLogPrintf(CTDL_ERR, "ERROR: Original_component is NULL.\n");
650 /* Merge the attendee's updated status into the event */
651 ical_merge_attendee_reply(original_event, cal);
654 serialized_event = icalcomponent_as_ical_string_r(original_event);
655 icalcomponent_free(original_event); /* Don't need this anymore. */
656 if (serialized_event == NULL) return(2);
658 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
660 message_text = malloc(strlen(serialized_event) + SIZ);
661 if (message_text != NULL) {
662 sprintf(message_text,
663 "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
667 msg = CtdlMakeMessage(&CC->user,
668 "", /* No recipient */
669 "", /* No recipient */
680 CIT_ICAL->avoid_sending_invitations = 1;
681 CtdlSubmitMsg(msg, NULL, roomname, QP_EADDR);
682 CtdlFreeMessage(msg);
683 CIT_ICAL->avoid_sending_invitations = 0;
686 free(serialized_event);
692 * Handle an incoming RSVP for an event. (This is the server subcommand part; it
693 * simply extracts the calendar object from the message, deserializes it, and
694 * passes it up to ical_update_my_calendar_with_reply() for processing.
696 void ical_handle_rsvp(long msgnum, char *partnum, char *action) {
697 struct CtdlMessage *msg = NULL;
698 struct ical_respond_data ird;
702 (strcasecmp(action, "update"))
703 && (strcasecmp(action, "ignore"))
705 cprintf("%d Action must be 'update' or 'ignore'\n",
706 ERROR + ILLEGAL_VALUE
711 msg = CtdlFetchMessage(msgnum, 1);
713 cprintf("%d Message %ld not found.\n",
714 ERROR + ILLEGAL_VALUE,
720 memset(&ird, 0, sizeof ird);
721 strcpy(ird.desired_partnum, partnum);
722 mime_parser(msg->cm_fields['M'],
724 *ical_locate_part, /* callback function */
726 (void *) &ird, /* user data */
730 /* We're done with the incoming message, because we now have a
731 * calendar object in memory.
733 CtdlFreeMessage(msg);
736 * Here is the real meat of this function. Handle the event.
738 if (ird.cal != NULL) {
739 /* Update the user's calendar if necessary */
740 if (!strcasecmp(action, "update")) {
741 ret = ical_update_my_calendar_with_reply(ird.cal);
743 cprintf("%d Your calendar has been updated with this reply.\n",
747 cprintf("%d This event does not exist in your calendar.\n",
748 ERROR + FILE_NOT_FOUND);
751 cprintf("%d An internal error occurred.\n",
752 ERROR + INTERNAL_ERROR);
756 cprintf("%d This reply has been ignored.\n", CIT_OK);
759 /* Now that we've processed this message, we don't need it
760 * anymore. So delete it. (Don't do this anymore.)
761 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
764 /* Free the memory we allocated and return a response. */
765 icalcomponent_free(ird.cal);
770 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
774 /* should never get here */
779 * Search for a property in both the top level and in a VEVENT subcomponent
781 icalproperty *ical_ctdl_get_subprop(
783 icalproperty_kind which_prop
788 p = icalcomponent_get_first_property(cal, which_prop);
790 c = icalcomponent_get_first_component(cal,
791 ICAL_VEVENT_COMPONENT);
793 p = icalcomponent_get_first_property(c, which_prop);
801 * Check to see if two events overlap. Returns nonzero if they do.
802 * (This function is used in both Citadel and WebCit. If you change it in
803 * one place, change it in the other. Better yet, put it in a library.)
805 int ical_ctdl_is_overlap(
806 struct icaltimetype t1start,
807 struct icaltimetype t1end,
808 struct icaltimetype t2start,
809 struct icaltimetype t2end
812 if (icaltime_is_null_time(t1start)) return(0);
813 if (icaltime_is_null_time(t2start)) return(0);
815 /* First, check for all-day events */
816 if (t1start.is_date) {
817 if (!icaltime_compare_date_only(t1start, t2start)) {
820 if (!icaltime_is_null_time(t2end)) {
821 if (!icaltime_compare_date_only(t1start, t2end)) {
827 if (t2start.is_date) {
828 if (!icaltime_compare_date_only(t2start, t1start)) {
831 if (!icaltime_is_null_time(t1end)) {
832 if (!icaltime_compare_date_only(t2start, t1end)) {
838 /* Now check for overlaps using date *and* time. */
840 /* First, bail out if either event 1 or event 2 is missing end time. */
841 if (icaltime_is_null_time(t1end)) return(0);
842 if (icaltime_is_null_time(t2end)) return(0);
844 /* If event 1 ends before event 2 starts, we're in the clear. */
845 if (icaltime_compare(t1end, t2start) <= 0) return(0);
847 /* If event 2 ends before event 1 starts, we're also ok. */
848 if (icaltime_compare(t2end, t1start) <= 0) return(0);
850 /* Otherwise, they overlap. */
857 * Phase 6 of "hunt for conflicts"
858 * called by ical_conflicts_phase5()
860 * Now both the proposed and existing events have been boiled down to start and end times.
861 * Check for overlap and output any conflicts.
863 * Returns nonzero if a conflict was reported. This allows the caller to stop iterating.
865 int ical_conflicts_phase6(struct icaltimetype t1start,
866 struct icaltimetype t1end,
867 struct icaltimetype t2start,
868 struct icaltimetype t2end,
869 long existing_msgnum,
870 char *conflict_event_uid,
871 char *conflict_event_summary,
874 int conflict_reported = 0;
878 tt = icaltime_as_timet_with_zone(t1start, t1start.zone);
879 CtdlLogPrintf(CTDL_DEBUG, "PROPOSED START: %s", ctime(&tt));
880 tt = icaltime_as_timet_with_zone(t1end, t1end.zone);
881 CtdlLogPrintf(CTDL_DEBUG, " PROPOSED END: %s", ctime(&tt));
882 tt = icaltime_as_timet_with_zone(t2start, t2start.zone);
883 CtdlLogPrintf(CTDL_DEBUG, "EXISTING START: %s", ctime(&tt));
884 tt = icaltime_as_timet_with_zone(t2end, t2end.zone);
885 CtdlLogPrintf(CTDL_DEBUG, " EXISTING END: %s", ctime(&tt));
888 /* compare and output */
890 if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
891 cprintf("%ld||%s|%s|%d|\n",
894 conflict_event_summary,
895 ( ((strlen(compare_uid)>0)
896 &&(!strcasecmp(compare_uid,
897 conflict_event_uid))) ? 1 : 0
900 conflict_reported = 1;
903 return(conflict_reported);
909 * Phase 5 of "hunt for conflicts"
910 * Called by ical_conflicts_phase4()
912 * We have the proposed event boiled down to start and end times.
913 * Now check it against an existing event.
915 void ical_conflicts_phase5(struct icaltimetype t1start,
916 struct icaltimetype t1end,
917 icalcomponent *existing_event,
918 long existing_msgnum,
921 char conflict_event_uid[SIZ];
922 char conflict_event_summary[SIZ];
923 struct icaltimetype t2start, t2end;
926 /* recur variables */
927 icalproperty *rrule = NULL;
928 struct icalrecurrencetype recur;
929 icalrecur_iterator *ritr = NULL;
930 struct icaldurationtype dur;
934 strcpy(conflict_event_uid, "");
935 strcpy(conflict_event_summary, "");
936 t2start = icaltime_null_time();
937 t2end = icaltime_null_time();
939 /* existing event stuff */
940 p = ical_ctdl_get_subprop(existing_event, ICAL_DTSTART_PROPERTY);
941 if (p == NULL) return;
942 if (p != NULL) t2start = icalproperty_get_dtstart(p);
943 if (icaltime_is_utc(t2start)) {
944 t2start.zone = icaltimezone_get_utc_timezone();
947 t2start.zone = icalcomponent_get_timezone(existing_event,
948 icalparameter_get_tzid(
949 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
953 t2start.zone = get_default_icaltimezone();
957 p = ical_ctdl_get_subprop(existing_event, ICAL_DTEND_PROPERTY);
959 t2end = icalproperty_get_dtend(p);
961 if (icaltime_is_utc(t2end)) {
962 t2end.zone = icaltimezone_get_utc_timezone();
965 t2end.zone = icalcomponent_get_timezone(existing_event,
966 icalparameter_get_tzid(
967 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
971 t2end.zone = get_default_icaltimezone();
974 dur = icaltime_subtract(t2end, t2start);
977 rrule = ical_ctdl_get_subprop(existing_event, ICAL_RRULE_PROPERTY);
979 recur = icalproperty_get_rrule(rrule);
980 ritr = icalrecur_iterator_new(recur, t2start);
984 p = ical_ctdl_get_subprop(existing_event, ICAL_UID_PROPERTY);
986 strcpy(conflict_event_uid, icalproperty_get_comment(p));
989 p = ical_ctdl_get_subprop(existing_event, ICAL_SUMMARY_PROPERTY);
991 strcpy(conflict_event_summary, icalproperty_get_comment(p));
994 if (ical_conflicts_phase6(t1start, t1end, t2start, t2end,
995 existing_msgnum, conflict_event_uid, conflict_event_summary, compare_uid))
997 num_recur = MAX_RECUR + 1; /* force it out of scope, no need to continue */
1001 t2start = icalrecur_iterator_next(ritr);
1002 if (!icaltime_is_null_time(t2end)) {
1003 const icaltimezone *hold_zone = t2end.zone;
1004 t2end = icaltime_add(t2start, dur);
1005 t2end.zone = hold_zone;
1010 if (icaltime_compare(t2start, t1end) < 0) {
1011 num_recur = MAX_RECUR + 1; /* force it out of scope */
1014 } while ( (rrule) && (!icaltime_is_null_time(t2start)) && (num_recur < MAX_RECUR) );
1015 icalrecur_iterator_free(ritr);
1022 * Phase 4 of "hunt for conflicts"
1023 * Called by ical_hunt_for_conflicts_backend()
1025 * At this point we've got it boiled down to two icalcomponent events in memory.
1026 * If they conflict, output something to the client.
1028 void ical_conflicts_phase4(icalcomponent *proposed_event,
1029 icalcomponent *existing_event,
1030 long existing_msgnum)
1032 struct icaltimetype t1start, t1end;
1033 t1start = icaltime_null_time();
1034 t1end = icaltime_null_time();
1036 char compare_uid[SIZ];
1038 /* recur variables */
1039 icalproperty *rrule = NULL;
1040 struct icalrecurrencetype recur;
1041 icalrecur_iterator *ritr = NULL;
1042 struct icaldurationtype dur;
1045 /* initialization */
1046 strcpy(compare_uid, "");
1048 /* proposed event stuff */
1050 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTSTART_PROPERTY);
1051 if (p == NULL) return;
1052 if (p != NULL) t1start = icalproperty_get_dtstart(p);
1053 if (icaltime_is_utc(t1start)) {
1054 t1start.zone = icaltimezone_get_utc_timezone();
1057 t1start.zone = icalcomponent_get_timezone(proposed_event,
1058 icalparameter_get_tzid(
1059 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1062 if (!t1start.zone) {
1063 t1start.zone = get_default_icaltimezone();
1067 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTEND_PROPERTY);
1069 t1end = icalproperty_get_dtend(p);
1071 if (icaltime_is_utc(t1end)) {
1072 t1end.zone = icaltimezone_get_utc_timezone();
1075 t1end.zone = icalcomponent_get_timezone(proposed_event,
1076 icalparameter_get_tzid(
1077 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1081 t1end.zone = get_default_icaltimezone();
1085 dur = icaltime_subtract(t1end, t1start);
1088 rrule = ical_ctdl_get_subprop(proposed_event, ICAL_RRULE_PROPERTY);
1090 recur = icalproperty_get_rrule(rrule);
1091 ritr = icalrecur_iterator_new(recur, t1start);
1094 p = ical_ctdl_get_subprop(proposed_event, ICAL_UID_PROPERTY);
1096 strcpy(compare_uid, icalproperty_get_comment(p));
1100 ical_conflicts_phase5(t1start, t1end, existing_event, existing_msgnum, compare_uid);
1103 t1start = icalrecur_iterator_next(ritr);
1104 if (!icaltime_is_null_time(t1end)) {
1105 const icaltimezone *hold_zone = t1end.zone;
1106 t1end = icaltime_add(t1start, dur);
1107 t1end.zone = hold_zone;
1112 } while ( (rrule) && (!icaltime_is_null_time(t1start)) && (num_recur < MAX_RECUR) );
1113 icalrecur_iterator_free(ritr);
1119 * Phase 3 of "hunt for conflicts"
1120 * Called by ical_hunt_for_conflicts()
1122 void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
1123 icalcomponent *proposed_event;
1124 struct CtdlMessage *msg = NULL;
1125 struct ical_respond_data ird;
1127 proposed_event = (icalcomponent *)data;
1129 msg = CtdlFetchMessage(msgnum, 1);
1130 if (msg == NULL) return;
1131 memset(&ird, 0, sizeof ird);
1132 strcpy(ird.desired_partnum, "_HUNT_");
1133 mime_parser(msg->cm_fields['M'],
1135 *ical_locate_part, /* callback function */
1137 (void *) &ird, /* user data */
1140 CtdlFreeMessage(msg);
1142 if (ird.cal == NULL) return;
1144 ical_conflicts_phase4(proposed_event, ird.cal, msgnum);
1145 icalcomponent_free(ird.cal);
1151 * Phase 2 of "hunt for conflicts" operation.
1152 * At this point we have a calendar object which represents the VEVENT that
1153 * is proposed for addition to the calendar. Now hunt through the user's
1154 * calendar room, and output zero or more existing VEVENTs which conflict
1157 void ical_hunt_for_conflicts(icalcomponent *cal) {
1158 char hold_rm[ROOMNAMELEN];
1160 strcpy(hold_rm, CC->room.QRname); /* save current room */
1162 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
1163 getroom(&CC->room, hold_rm);
1164 cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
1168 cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
1170 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1173 ical_hunt_for_conflicts_backend,
1178 getroom(&CC->room, hold_rm); /* return to saved room */
1185 * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
1187 void ical_conflicts(long msgnum, char *partnum) {
1188 struct CtdlMessage *msg = NULL;
1189 struct ical_respond_data ird;
1191 msg = CtdlFetchMessage(msgnum, 1);
1193 cprintf("%d Message %ld not found\n",
1194 ERROR + ILLEGAL_VALUE,
1200 memset(&ird, 0, sizeof ird);
1201 strcpy(ird.desired_partnum, partnum);
1202 mime_parser(msg->cm_fields['M'],
1204 *ical_locate_part, /* callback function */
1206 (void *) &ird, /* user data */
1210 CtdlFreeMessage(msg);
1212 if (ird.cal != NULL) {
1213 ical_hunt_for_conflicts(ird.cal);
1214 icalcomponent_free(ird.cal);
1218 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
1224 * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
1226 * fb The VFREEBUSY component to which we are appending
1227 * top_level_cal The top-level VCALENDAR component which contains a VEVENT to be added
1229 void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
1233 struct icalperiodtype this_event_period = icalperiodtype_null_period();
1234 icaltimetype dtstart = icaltime_null_time();
1235 icaltimetype dtend = icaltime_null_time();
1237 /* recur variables */
1238 icalproperty *rrule = NULL;
1239 struct icalrecurrencetype recur;
1240 icalrecur_iterator *ritr = NULL;
1241 struct icaldurationtype dur;
1244 if (!top_level_cal) return;
1246 /* Find the VEVENT component containing an event */
1247 cal = icalcomponent_get_first_component(top_level_cal, ICAL_VEVENT_COMPONENT);
1250 /* If this event is not opaque, the user isn't publishing it as
1251 * busy time, so don't bother doing anything else.
1253 p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
1255 v = icalproperty_get_value(p);
1257 if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
1264 * Now begin calculating the event start and end times.
1266 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
1268 dtstart = icalproperty_get_dtstart(p);
1270 if (icaltime_is_utc(dtstart)) {
1271 dtstart.zone = icaltimezone_get_utc_timezone();
1274 dtstart.zone = icalcomponent_get_timezone(top_level_cal,
1275 icalparameter_get_tzid(
1276 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1279 if (!dtstart.zone) {
1280 dtstart.zone = get_default_icaltimezone();
1284 dtend = icalcomponent_get_dtend(cal);
1285 if (!icaltime_is_null_time(dtend)) {
1286 dur = icaltime_subtract(dtend, dtstart);
1289 /* Is a recurrence specified? If so, get ready to process it... */
1290 rrule = ical_ctdl_get_subprop(cal, ICAL_RRULE_PROPERTY);
1292 recur = icalproperty_get_rrule(rrule);
1293 ritr = icalrecur_iterator_new(recur, dtstart);
1297 /* Convert the DTSTART and DTEND properties to an icalperiod. */
1298 this_event_period.start = dtstart;
1300 if (!icaltime_is_null_time(dtend)) {
1301 this_event_period.end = dtend;
1304 /* Convert the timestamps to UTC. It's ok to do this because we've already expanded
1305 * recurrences and this data is never going to get used again.
1307 this_event_period.start = icaltime_convert_to_zone(
1308 this_event_period.start,
1309 icaltimezone_get_utc_timezone()
1311 this_event_period.end = icaltime_convert_to_zone(
1312 this_event_period.end,
1313 icaltimezone_get_utc_timezone()
1317 icalcomponent_add_property(fb, icalproperty_new_freebusy(this_event_period));
1319 /* Make sure the DTSTART property of the freebusy *list* is set to
1320 * the DTSTART property of the *earliest event*.
1322 p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
1324 icalcomponent_set_dtstart(fb, this_event_period.start);
1327 if (icaltime_compare(this_event_period.start, icalcomponent_get_dtstart(fb)) < 0) {
1328 icalcomponent_set_dtstart(fb, this_event_period.start);
1332 /* Make sure the DTEND property of the freebusy *list* is set to
1333 * the DTEND property of the *latest event*.
1335 p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
1337 icalcomponent_set_dtend(fb, this_event_period.end);
1340 if (icaltime_compare(this_event_period.end, icalcomponent_get_dtend(fb)) > 0) {
1341 icalcomponent_set_dtend(fb, this_event_period.end);
1346 dtstart = icalrecur_iterator_next(ritr);
1347 if (!icaltime_is_null_time(dtend)) {
1348 dtend = icaltime_add(dtstart, dur);
1349 dtend.zone = dtstart.zone;
1350 dtend.is_utc = dtstart.is_utc;
1355 } while ( (rrule) && (!icaltime_is_null_time(dtstart)) && (num_recur < MAX_RECUR) ) ;
1356 icalrecur_iterator_free(ritr);
1362 * Backend for ical_freebusy()
1364 * This function simply loads the messages in the user's calendar room,
1365 * which contain VEVENTs, then strips them of all non-freebusy data, and
1366 * adds them to the supplied VCALENDAR.
1369 void ical_freebusy_backend(long msgnum, void *data) {
1371 struct CtdlMessage *msg = NULL;
1372 struct ical_respond_data ird;
1374 fb = (icalcomponent *)data; /* User-supplied data will be the VFREEBUSY component */
1376 msg = CtdlFetchMessage(msgnum, 1);
1377 if (msg == NULL) return;
1378 memset(&ird, 0, sizeof ird);
1379 strcpy(ird.desired_partnum, "_HUNT_");
1380 mime_parser(msg->cm_fields['M'],
1382 *ical_locate_part, /* callback function */
1384 (void *) &ird, /* user data */
1387 CtdlFreeMessage(msg);
1390 ical_add_to_freebusy(fb, ird.cal); /* Add VEVENT times to VFREEBUSY */
1391 icalcomponent_free(ird.cal);
1398 * Grab another user's free/busy times
1400 void ical_freebusy(char *who) {
1401 struct ctdluser usbuf;
1402 char calendar_room_name[ROOMNAMELEN];
1403 char hold_rm[ROOMNAMELEN];
1404 char *serialized_request = NULL;
1405 icalcomponent *encaps = NULL;
1406 icalcomponent *fb = NULL;
1407 int found_user = (-1);
1408 struct recptypes *recp = NULL;
1413 int config_lines = 0;
1415 /* First try an exact match. */
1416 found_user = getuser(&usbuf, who);
1418 /* If not found, try it as an unqualified email address. */
1419 if (found_user != 0) {
1421 recp = validate_recipients(buf, NULL, 0);
1422 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1424 if (recp->num_local == 1) {
1425 found_user = getuser(&usbuf, recp->recp_local);
1427 free_recipients(recp);
1431 /* If still not found, try it as an address qualified with the
1432 * primary FQDN of this Citadel node.
1434 if (found_user != 0) {
1435 snprintf(buf, sizeof buf, "%s@%s", who, config.c_fqdn);
1436 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1437 recp = validate_recipients(buf, NULL, 0);
1439 if (recp->num_local == 1) {
1440 found_user = getuser(&usbuf, recp->recp_local);
1442 free_recipients(recp);
1446 /* Still not found? Try qualifying it with every domain we
1447 * might have addresses in.
1449 if (found_user != 0) {
1450 config_lines = num_tokens(inetcfg, '\n');
1451 for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
1452 extract_token(buf, inetcfg, i, '\n', sizeof buf);
1453 extract_token(host, buf, 0, '|', sizeof host);
1454 extract_token(type, buf, 1, '|', sizeof type);
1456 if ( (!strcasecmp(type, "localhost"))
1457 || (!strcasecmp(type, "directory")) ) {
1458 snprintf(buf, sizeof buf, "%s@%s", who, host);
1459 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1460 recp = validate_recipients(buf, NULL, 0);
1462 if (recp->num_local == 1) {
1463 found_user = getuser(&usbuf, recp->recp_local);
1465 free_recipients(recp);
1471 if (found_user != 0) {
1472 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
1476 MailboxName(calendar_room_name, sizeof calendar_room_name,
1477 &usbuf, USERCALENDARROOM);
1479 strcpy(hold_rm, CC->room.QRname); /* save current room */
1481 if (getroom(&CC->room, calendar_room_name) != 0) {
1482 cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
1483 getroom(&CC->room, hold_rm);
1487 /* Create a VFREEBUSY subcomponent */
1488 CtdlLogPrintf(CTDL_DEBUG, "Creating VFREEBUSY component\n");
1489 fb = icalcomponent_new_vfreebusy();
1491 cprintf("%d Internal error: cannot allocate memory.\n",
1492 ERROR + INTERNAL_ERROR);
1493 getroom(&CC->room, hold_rm);
1497 /* Set the method to PUBLISH */
1498 icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
1500 /* Set the DTSTAMP to right now. */
1501 icalcomponent_set_dtstamp(fb, icaltime_from_timet(time(NULL), 0));
1503 /* Add the user's email address as ORGANIZER */
1504 sprintf(buf, "MAILTO:%s", who);
1505 if (strchr(buf, '@') == NULL) {
1507 strcat(buf, config.c_fqdn);
1509 for (i=0; buf[i]; ++i) {
1510 if (buf[i]==' ') buf[i] = '_';
1512 icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
1514 /* Add busy time from events */
1515 CtdlLogPrintf(CTDL_DEBUG, "Adding busy time from events\n");
1516 CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
1518 /* If values for DTSTART and DTEND are still not present, set them
1519 * to yesterday and tomorrow as default values.
1521 if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
1522 icalcomponent_set_dtstart(fb, icaltime_from_timet(time(NULL)-86400L, 0));
1524 if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
1525 icalcomponent_set_dtend(fb, icaltime_from_timet(time(NULL)+86400L, 0));
1528 /* Put the freebusy component into the calendar component */
1529 CtdlLogPrintf(CTDL_DEBUG, "Encapsulating\n");
1530 encaps = ical_encapsulate_subcomponent(fb);
1531 if (encaps == NULL) {
1532 icalcomponent_free(fb);
1533 cprintf("%d Internal error: cannot allocate memory.\n",
1534 ERROR + INTERNAL_ERROR);
1535 getroom(&CC->room, hold_rm);
1539 /* Set the method to PUBLISH */
1540 CtdlLogPrintf(CTDL_DEBUG, "Setting method\n");
1541 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1544 CtdlLogPrintf(CTDL_DEBUG, "Serializing\n");
1545 serialized_request = icalcomponent_as_ical_string_r(encaps);
1546 icalcomponent_free(encaps); /* Don't need this anymore. */
1548 cprintf("%d Free/busy for %s\n", LISTING_FOLLOWS, usbuf.fullname);
1549 if (serialized_request != NULL) {
1550 client_write(serialized_request, strlen(serialized_request));
1551 free(serialized_request);
1555 /* Go back to the room from which we came... */
1556 getroom(&CC->room, hold_rm);
1562 * Backend for ical_getics()
1564 * This is a ForEachMessage() callback function that searches the current room
1565 * for calendar events and adds them each into one big calendar component.
1567 void ical_getics_backend(long msgnum, void *data) {
1568 icalcomponent *encaps, *c;
1569 struct CtdlMessage *msg = NULL;
1570 struct ical_respond_data ird;
1572 encaps = (icalcomponent *)data;
1573 if (encaps == NULL) return;
1575 /* Look for the calendar event... */
1577 msg = CtdlFetchMessage(msgnum, 1);
1578 if (msg == NULL) return;
1579 memset(&ird, 0, sizeof ird);
1580 strcpy(ird.desired_partnum, "_HUNT_");
1581 mime_parser(msg->cm_fields['M'],
1583 *ical_locate_part, /* callback function */
1585 (void *) &ird, /* user data */
1588 CtdlFreeMessage(msg);
1590 if (ird.cal == NULL) return;
1592 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1593 * are responsible for "the_request"'s memory -- it will be freed
1594 * when we free "encaps".
1597 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1598 * in. This will almost never happen.
1600 if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
1601 icalcomponent_add_component(encaps, ird.cal);
1604 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1605 * and other components encapsulated inside, we have to extract them.
1608 for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
1610 c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
1612 /* For VTIMEZONE components, suppress duplicates of the same tzid */
1614 if (icalcomponent_isa(c) == ICAL_VTIMEZONE_COMPONENT) {
1615 icalproperty *p = icalcomponent_get_first_property(c, ICAL_TZID_PROPERTY);
1617 const char *tzid = icalproperty_get_tzid(p);
1618 if (!icalcomponent_get_timezone(encaps, tzid)) {
1619 icalcomponent_add_component(encaps,
1620 icalcomponent_new_clone(c));
1625 /* All other types of components can go in verbatim */
1627 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1630 icalcomponent_free(ird.cal);
1637 * Retrieve all of the calendar items in the current room, and output them
1638 * as a single icalendar object.
1640 void ical_getics(void)
1642 icalcomponent *encaps = NULL;
1645 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1646 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1647 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1648 return; /* Not an iCalendar-centric room */
1651 encaps = icalcomponent_new_vcalendar();
1652 if (encaps == NULL) {
1653 CtdlLogPrintf(CTDL_ALERT, "ERROR: could not allocate component!\n");
1654 cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
1658 cprintf("%d one big calendar\n", LISTING_FOLLOWS);
1660 /* Set the Product ID */
1661 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1663 /* Set the Version Number */
1664 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1666 /* Set the method to PUBLISH */
1667 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1669 /* Now go through the room encapsulating all calendar items. */
1670 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1673 ical_getics_backend,
1677 ser = icalcomponent_as_ical_string_r(encaps);
1678 icalcomponent_free(encaps); /* Don't need this anymore. */
1679 client_write(ser, strlen(ser));
1686 * Helper callback function for ical_putics() to discover which TZID's we need.
1687 * Simply put the tzid name string into a hash table. After the callbacks are
1688 * done we'll go through them and attach the ones that we have.
1690 void ical_putics_grabtzids(icalparameter *param, void *data)
1692 const char *tzid = icalparameter_get_tzid(param);
1693 HashList *keys = (HashList *) data;
1695 if ( (keys) && (tzid) && (!IsEmptyStr(tzid)) ) {
1696 Put(keys, tzid, strlen(tzid), strdup(tzid), generic_free_handler);
1702 * Delete all of the calendar items in the current room, and replace them
1703 * with calendar items from a client-supplied data stream.
1705 void ical_putics(void)
1707 char *calstream = NULL;
1710 icalcomponent *encaps = NULL;
1711 HashList *tzidlist = NULL;
1717 /* Only allow this operation if we're in a room containing a calendar or tasks view */
1718 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1719 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1720 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1724 /* Only allow this operation if we have permission to overwrite the existing calendar */
1725 if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
1726 cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
1730 cprintf("%d Transmit data now\n", SEND_LISTING);
1731 calstream = CtdlReadMessageBody("000", config.c_maxmsglen, NULL, 0, 0);
1732 if (calstream == NULL) {
1736 cal = icalcomponent_new_from_string(calstream);
1739 /* We got our data stream -- now do something with it. */
1741 /* Delete the existing messages in the room, because we are overwriting
1742 * the entire calendar with an entire new (or updated) calendar.
1743 * (Careful: this opens an S_ROOMS critical section!)
1745 CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
1747 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1748 * in. This will almost never happen.
1750 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
1751 ical_write_to_cal(NULL, cal);
1754 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1755 * and other components encapsulated inside, we have to extract them.
1758 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1760 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1762 /* Non-VTIMEZONE components each get written as individual messages.
1763 * But we also need to attach the relevant VTIMEZONE components to them.
1765 if ( (icalcomponent_isa(c) != ICAL_VTIMEZONE_COMPONENT)
1766 && (encaps = icalcomponent_new_vcalendar()) ) {
1767 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1768 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1769 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1771 /* Attach any needed timezones here */
1772 tzidlist = NewHash(1, NULL);
1774 icalcomponent_foreach_tzid(c, ical_putics_grabtzids, tzidlist);
1776 HashPos = GetNewHashPos(tzidlist, 0);
1778 while (GetNextHashPos(tzidlist, HashPos, &len, &Key, &Value)) {
1779 CtdlLogPrintf(CTDL_DEBUG, "Attaching timezone '%s'\n", Value);
1780 icaltimezone *t = NULL;
1782 /* First look for a timezone attached to the original calendar */
1783 t = icalcomponent_get_timezone(cal, Value);
1785 /* Try built-in tzdata if the right one wasn't attached */
1787 t = icaltimezone_get_builtin_timezone(Value);
1790 /* I've got a valid timezone to attach. */
1792 icalcomponent_add_component(encaps,
1793 icalcomponent_new_clone(
1794 icaltimezone_get_component(t)
1800 DeleteHashPos(&HashPos);
1801 DeleteHash(&tzidlist);
1803 /* Now attach the component itself (usually a VEVENT or VTODO) */
1804 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1806 /* Write it to the message store */
1807 ical_write_to_cal(NULL, encaps);
1808 icalcomponent_free(encaps);
1813 icalcomponent_free(cal);
1818 * All Citadel calendar commands from the client come through here.
1820 void cmd_ical(char *argbuf)
1828 extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
1830 /* Allow "test" and "freebusy" subcommands without logging in. */
1832 if (!strcasecmp(subcmd, "test")) {
1833 cprintf("%d This server supports calendaring\n", CIT_OK);
1837 if (!strcasecmp(subcmd, "freebusy")) {
1838 extract_token(who, argbuf, 1, '|', sizeof who);
1843 if (!strcasecmp(subcmd, "sgi")) {
1844 CIT_ICAL->server_generated_invitations =
1845 (extract_int(argbuf, 1) ? 1 : 0) ;
1847 CIT_OK, CIT_ICAL->server_generated_invitations);
1851 if (CtdlAccessCheck(ac_logged_in)) return;
1853 if (!strcasecmp(subcmd, "respond")) {
1854 msgnum = extract_long(argbuf, 1);
1855 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1856 extract_token(action, argbuf, 3, '|', sizeof action);
1857 ical_respond(msgnum, partnum, action);
1861 if (!strcasecmp(subcmd, "handle_rsvp")) {
1862 msgnum = extract_long(argbuf, 1);
1863 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1864 extract_token(action, argbuf, 3, '|', sizeof action);
1865 ical_handle_rsvp(msgnum, partnum, action);
1869 if (!strcasecmp(subcmd, "conflicts")) {
1870 msgnum = extract_long(argbuf, 1);
1871 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1872 ical_conflicts(msgnum, partnum);
1876 if (!strcasecmp(subcmd, "getics")) {
1881 if (!strcasecmp(subcmd, "putics")) {
1886 cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
1892 * We don't know if the calendar room exists so we just create it at login
1894 void ical_create_room(void)
1899 /* Create the calendar room if it doesn't already exist */
1900 create_room(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
1902 /* Set expiration policy to manual; otherwise objects will be lost! */
1903 if (lgetroom(&qr, USERCALENDARROOM)) {
1904 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1907 qr.QRep.expire_mode = EXPIRE_MANUAL;
1908 qr.QRdefaultview = VIEW_CALENDAR; /* 3 = calendar view */
1911 /* Set the view to a calendar view */
1912 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1913 vbuf.v_view = VIEW_CALENDAR;
1914 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1916 /* Create the tasks list room if it doesn't already exist */
1917 create_room(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
1919 /* Set expiration policy to manual; otherwise objects will be lost! */
1920 if (lgetroom(&qr, USERTASKSROOM)) {
1921 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1924 qr.QRep.expire_mode = EXPIRE_MANUAL;
1925 qr.QRdefaultview = VIEW_TASKS;
1928 /* Set the view to a task list view */
1929 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1930 vbuf.v_view = VIEW_TASKS;
1931 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1933 /* Create the notes room if it doesn't already exist */
1934 create_room(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
1936 /* Set expiration policy to manual; otherwise objects will be lost! */
1937 if (lgetroom(&qr, USERNOTESROOM)) {
1938 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1941 qr.QRep.expire_mode = EXPIRE_MANUAL;
1942 qr.QRdefaultview = VIEW_NOTES;
1945 /* Set the view to a notes view */
1946 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1947 vbuf.v_view = VIEW_NOTES;
1948 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1955 * ical_send_out_invitations() is called by ical_saving_vevent() when it finds a VEVENT.
1957 * top_level_cal is the highest available level calendar object.
1958 * cal is the subcomponent containing the VEVENT.
1960 * Note: if you change the encapsulation code here, change it in WebCit's ical_encapsulate_subcomponent()
1962 void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal) {
1963 icalcomponent *the_request = NULL;
1964 char *serialized_request = NULL;
1965 icalcomponent *encaps = NULL;
1966 char *request_message_text = NULL;
1967 struct CtdlMessage *msg = NULL;
1968 struct recptypes *valid = NULL;
1969 char attendees_string[SIZ];
1970 int num_attendees = 0;
1971 char this_attendee[256];
1972 icalproperty *attendee = NULL;
1973 char summary_string[SIZ];
1974 icalproperty *summary = NULL;
1977 struct icaltimetype t;
1978 icaltimezone *attached_zones[5] = { NULL, NULL, NULL, NULL, NULL };
1981 int num_zones_attached = 0;
1982 int zone_already_attached;
1985 CtdlLogPrintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
1990 /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
1991 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1992 ical_send_out_invitations(top_level_cal,
1993 icalcomponent_get_first_component(
1994 cal, ICAL_VEVENT_COMPONENT
2000 /* Clone the event */
2001 the_request = icalcomponent_new_clone(cal);
2002 if (the_request == NULL) {
2003 CtdlLogPrintf(CTDL_ERR, "ERROR: cannot clone calendar object\n");
2007 /* Extract the summary string -- we'll use it as the
2008 * message subject for the request
2010 strcpy(summary_string, "Meeting request");
2011 summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
2012 if (summary != NULL) {
2013 if (icalproperty_get_summary(summary)) {
2014 strcpy(summary_string,
2015 icalproperty_get_summary(summary) );
2019 /* Determine who the recipients of this message are (the attendees) */
2020 strcpy(attendees_string, "");
2021 for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
2022 if (icalproperty_get_attendee(attendee)) {
2023 safestrncpy(this_attendee, icalproperty_get_attendee(attendee), sizeof this_attendee);
2024 if (!strncasecmp(this_attendee, "MAILTO:", 7)) {
2025 strcpy(this_attendee, &this_attendee[7]);
2027 if (!CtdlIsMe(this_attendee, sizeof this_attendee)) { /* don't send an invitation to myself! */
2028 snprintf(&attendees_string[strlen(attendees_string)],
2029 sizeof(attendees_string) - strlen(attendees_string),
2039 CtdlLogPrintf(CTDL_DEBUG, "<%d> attendees: <%s>\n", num_attendees, attendees_string);
2041 /* If there are no attendees, there are no invitations to send, so...
2042 * don't bother putting one together! Punch out, Maverick!
2044 if (num_attendees == 0) {
2045 icalcomponent_free(the_request);
2049 /* Encapsulate the VEVENT component into a complete VCALENDAR */
2050 encaps = icalcomponent_new_vcalendar();
2051 if (encaps == NULL) {
2052 CtdlLogPrintf(CTDL_ALERT, "ERROR: could not allocate component!\n");
2053 icalcomponent_free(the_request);
2057 /* Set the Product ID */
2058 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
2060 /* Set the Version Number */
2061 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
2063 /* Set the method to REQUEST */
2064 icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
2066 /* Look for properties containing timezone parameters, to see if we need to attach VTIMEZONEs */
2067 for (p = icalcomponent_get_first_property(the_request, ICAL_ANY_PROPERTY);
2069 p = icalcomponent_get_next_property(the_request, ICAL_ANY_PROPERTY))
2071 if ( (icalproperty_isa(p) == ICAL_COMPLETED_PROPERTY)
2072 || (icalproperty_isa(p) == ICAL_CREATED_PROPERTY)
2073 || (icalproperty_isa(p) == ICAL_DATEMAX_PROPERTY)
2074 || (icalproperty_isa(p) == ICAL_DATEMIN_PROPERTY)
2075 || (icalproperty_isa(p) == ICAL_DTEND_PROPERTY)
2076 || (icalproperty_isa(p) == ICAL_DTSTAMP_PROPERTY)
2077 || (icalproperty_isa(p) == ICAL_DTSTART_PROPERTY)
2078 || (icalproperty_isa(p) == ICAL_DUE_PROPERTY)
2079 || (icalproperty_isa(p) == ICAL_EXDATE_PROPERTY)
2080 || (icalproperty_isa(p) == ICAL_LASTMODIFIED_PROPERTY)
2081 || (icalproperty_isa(p) == ICAL_MAXDATE_PROPERTY)
2082 || (icalproperty_isa(p) == ICAL_MINDATE_PROPERTY)
2083 || (icalproperty_isa(p) == ICAL_RECURRENCEID_PROPERTY)
2085 t = icalproperty_get_dtstart(p); // it's safe to use dtstart for all of them
2087 /* First see if there's a timezone attached to the data structure itself */
2088 if (icaltime_is_utc(t)) {
2089 z = icaltimezone_get_utc_timezone();
2092 z = icaltime_get_timezone(t);
2095 /* If not, try to determine the tzid from the parameter using attached zones */
2097 z = icalcomponent_get_timezone(top_level_cal,
2098 icalparameter_get_tzid(
2099 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
2104 /* Still no good? Try our internal database */
2106 z = icaltimezone_get_builtin_timezone_from_tzid(
2107 icalparameter_get_tzid(
2108 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
2114 /* We have a valid timezone. Good. Now we need to attach it. */
2116 zone_already_attached = 0;
2117 for (i=0; i<5; ++i) {
2118 if (z == attached_zones[i]) {
2119 /* We've already got this one, no need to attach another. */
2120 ++zone_already_attached;
2123 if ((!zone_already_attached) && (num_zones_attached < 5)) {
2124 /* This is a new one, so attach it. */
2125 attached_zones[num_zones_attached++] = z;
2128 icalproperty_set_parameter(p,
2129 icalparameter_new_tzid(icaltimezone_get_tzid(z))
2135 /* Encapsulate any timezones we need */
2136 if (num_zones_attached > 0) for (i=0; i<num_zones_attached; ++i) {
2138 zc = icalcomponent_new_clone(icaltimezone_get_component(attached_zones[i]));
2139 icalcomponent_add_component(encaps, zc);
2142 /* Here we go: encapsulate the VEVENT into the VCALENDAR. We now no longer
2143 * are responsible for "the_request"'s memory -- it will be freed
2144 * when we free "encaps".
2146 icalcomponent_add_component(encaps, the_request);
2149 serialized_request = icalcomponent_as_ical_string_r(encaps);
2150 icalcomponent_free(encaps); /* Don't need this anymore. */
2151 if (serialized_request == NULL) return;
2153 reqsize = strlen(serialized_request) + SIZ;
2154 request_message_text = malloc(reqsize);
2155 if (request_message_text != NULL) {
2156 snprintf(request_message_text, reqsize,
2157 "Content-type: text/calendar\r\n\r\n%s\r\n",
2161 msg = CtdlMakeMessage(&CC->user,
2162 "", /* No single recipient here */
2163 "", /* No single recipient here */
2164 CC->room.QRname, 0, FMT_RFC822,
2167 summary_string, /* Use summary for subject */
2169 request_message_text,
2173 valid = validate_recipients(attendees_string, NULL, 0);
2174 CtdlSubmitMsg(msg, valid, "", QP_EADDR);
2175 CtdlFreeMessage(msg);
2176 free_recipients(valid);
2179 free(serialized_request);
2184 * When a calendar object is being saved, determine whether it's a VEVENT
2185 * and the user saving it is the organizer. If so, send out invitations
2186 * to any listed attendees.
2188 * This function is recursive. The caller can simply supply the same object
2189 * as both arguments. When it recurses it will alter the second argument
2190 * while holding on to the top level object. This allows us to go back and
2191 * grab things like time zones which might be attached.
2194 void ical_saving_vevent(icalcomponent *top_level_cal, icalcomponent *cal) {
2196 icalproperty *organizer = NULL;
2197 char organizer_string[SIZ];
2199 CtdlLogPrintf(CTDL_DEBUG, "ical_saving_vevent() has been called!\n");
2201 /* Don't send out invitations unless the client wants us to. */
2202 if (CIT_ICAL->server_generated_invitations == 0) {
2206 /* Don't send out invitations if we've been asked not to. */
2207 if (CIT_ICAL->avoid_sending_invitations > 0) {
2211 strcpy(organizer_string, "");
2213 * The VEVENT subcomponent is the one we're interested in.
2214 * Send out invitations if, and only if, this user is the Organizer.
2216 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
2217 organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
2218 if (organizer != NULL) {
2219 if (icalproperty_get_organizer(organizer)) {
2220 strcpy(organizer_string,
2221 icalproperty_get_organizer(organizer));
2224 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
2225 strcpy(organizer_string, &organizer_string[7]);
2226 striplt(organizer_string);
2228 * If the user saving the event is listed as the
2229 * organizer, then send out invitations.
2231 if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
2232 ical_send_out_invitations(top_level_cal, cal);
2237 /* If the component has subcomponents, recurse through them. */
2238 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2240 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2241 /* Recursively process subcomponent */
2242 ical_saving_vevent(top_level_cal, c);
2250 * Back end for ical_obj_beforesave()
2251 * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
2252 * the summary of the event (becomes message subject),
2253 * and the start time (becomes message date/time).
2255 void ical_obj_beforesave_backend(char *name, char *filename, char *partnum,
2256 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2257 char *encoding, char *cbid, void *cbuserdata)
2259 icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
2261 char new_uid[256] = "";
2262 char buf[1024] = "";
2263 struct CtdlMessage *msg = (struct CtdlMessage *) cbuserdata;
2267 /* We're only interested in calendar data. */
2268 if ( (strcasecmp(cbtype, "text/calendar"))
2269 && (strcasecmp(cbtype, "application/ics")) ) {
2273 /* Hunt for the UID and drop it in
2274 * the "user data" pointer for the MIME parser. When
2275 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2278 whole_cal = icalcomponent_new_from_string(content);
2281 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
2282 nested_event = icalcomponent_get_first_component(
2283 cal, ICAL_VEVENT_COMPONENT);
2284 if (nested_event != NULL) {
2288 nested_todo = icalcomponent_get_first_component(
2289 cal, ICAL_VTODO_COMPONENT);
2290 if (nested_todo != NULL) {
2298 /* Set the message EUID to the iCalendar UID */
2300 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2302 /* If there's no uid we must generate one */
2303 generate_uuid(new_uid);
2304 icalcomponent_add_property(cal, icalproperty_new_uid(new_uid));
2305 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2308 safestrncpy(buf, icalproperty_get_comment(p), sizeof buf);
2309 if (!IsEmptyStr(buf)) {
2310 if (msg->cm_fields['E'] != NULL) {
2311 free(msg->cm_fields['E']);
2313 msg->cm_fields['E'] = strdup(buf);
2314 CtdlLogPrintf(CTDL_DEBUG, "Saving calendar UID <%s>\n", buf);
2318 /* Set the message subject to the iCalendar summary */
2320 p = ical_ctdl_get_subprop(cal, ICAL_SUMMARY_PROPERTY);
2322 safestrncpy(buf, icalproperty_get_comment(p), sizeof buf);
2323 if (!IsEmptyStr(buf)) {
2324 if (msg->cm_fields['U'] != NULL) {
2325 free(msg->cm_fields['U']);
2327 msg->cm_fields['U'] = strdup(buf);
2331 /* Set the message date/time to the iCalendar start time */
2333 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
2336 idtstart = icaltime_as_timet(icalproperty_get_dtstart(p));
2338 if (msg->cm_fields['T'] != NULL) {
2339 free(msg->cm_fields['T']);
2341 msg->cm_fields['T'] = strdup("000000000000000000");
2342 sprintf(msg->cm_fields['T'], "%ld", idtstart);
2347 icalcomponent_free(cal);
2348 if (whole_cal != cal) {
2349 icalcomponent_free(whole_cal);
2358 * See if we need to prevent the object from being saved (we don't allow
2359 * MIME types other than text/calendar in "calendar" or "tasks" rooms).
2361 * If the message is being saved, we also set various message header fields
2362 * using data found in the iCalendar object.
2364 int ical_obj_beforesave(struct CtdlMessage *msg)
2366 /* First determine if this is a calendar or tasks room */
2367 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
2368 && (CC->room.QRdefaultview != VIEW_TASKS)
2370 return(0); /* Not an iCalendar-centric room */
2373 /* It must be an RFC822 message! */
2374 if (msg->cm_format_type != 4) {
2375 CtdlLogPrintf(CTDL_DEBUG, "Rejecting non-RFC822 message\n");
2376 return(1); /* You tried to save a non-RFC822 message! */
2379 if (msg->cm_fields['M'] == NULL) {
2380 return(1); /* You tried to save a null message! */
2383 /* Do all of our lovely back-end parsing */
2384 mime_parser(msg->cm_fields['M'],
2386 *ical_obj_beforesave_backend,
2397 * Things we need to do after saving a calendar event.
2399 void ical_obj_aftersave_backend(char *name, char *filename, char *partnum,
2400 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2401 char *encoding, char *cbid, void *cbuserdata)
2405 /* We're only interested in calendar items here. */
2406 if ( (strcasecmp(cbtype, "text/calendar"))
2407 && (strcasecmp(cbtype, "application/ics")) ) {
2411 /* Hunt for the UID and drop it in
2412 * the "user data" pointer for the MIME parser. When
2413 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2416 if ( (!strcasecmp(cbtype, "text/calendar"))
2417 || (!strcasecmp(cbtype, "application/ics")) ) {
2418 cal = icalcomponent_new_from_string(content);
2420 ical_saving_vevent(cal, cal);
2421 icalcomponent_free(cal);
2428 * Things we need to do after saving a calendar event.
2429 * (This will start back end tasks such as automatic generation of invitations,
2430 * if such actions are appropriate.)
2432 int ical_obj_aftersave(struct CtdlMessage *msg)
2434 char roomname[ROOMNAMELEN];
2437 * If this isn't the Calendar> room, no further action is necessary.
2440 /* First determine if this is our room */
2441 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
2442 if (strcasecmp(roomname, CC->room.QRname)) {
2443 return(0); /* Not the Calendar room -- don't do anything. */
2446 /* It must be an RFC822 message! */
2447 if (msg->cm_format_type != 4) return(1);
2449 /* Reject null messages */
2450 if (msg->cm_fields['M'] == NULL) return(1);
2452 /* Now recurse through it looking for our icalendar data */
2453 mime_parser(msg->cm_fields['M'],
2455 *ical_obj_aftersave_backend,
2465 void ical_session_startup(void) {
2466 CIT_ICAL = malloc(sizeof(struct cit_ical));
2467 memset(CIT_ICAL, 0, sizeof(struct cit_ical));
2470 void ical_session_shutdown(void) {
2476 * Back end for ical_fixed_output()
2478 void ical_fixed_output_backend(icalcomponent *cal,
2485 p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
2487 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2490 p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
2492 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2495 p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
2497 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2500 /* If the component has attendees, iterate through them. */
2501 for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
2502 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
2503 if (!strncasecmp(buf, "MAILTO:", 7)) {
2505 /* screen name or email address */
2506 strcpy(buf, &buf[7]);
2508 cprintf("%s ", buf);
2513 /* If the component has subcomponents, recurse through them. */
2514 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2516 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2517 /* Recursively process subcomponent */
2518 ical_fixed_output_backend(c, recursion_level+1);
2525 * Function to output iCalendar data as plain text. Nobody uses MSG0
2526 * anymore, so really this is just so we expose the vCard data to the full
2529 void ical_fixed_output(char *ptr, int len) {
2533 stringy_cal = malloc(len + 1);
2534 safestrncpy(stringy_cal, ptr, len + 1);
2535 cal = icalcomponent_new_from_string(stringy_cal);
2542 ical_fixed_output_backend(cal, 0);
2544 /* Free the memory we obtained from libical's constructor */
2545 icalcomponent_free(cal);
2550 void serv_calendar_destroy(void)
2552 icaltimezone_free_builtin_timezones();
2556 * Register this module with the Citadel server.
2558 CTDL_MODULE_INIT(calendar)
2563 /* Tell libical to return errors instead of aborting if it gets bad data */
2564 icalerror_errors_are_fatal = 0;
2566 /* Use our own application prefix in tzid's generated from system tzdata */
2567 icaltimezone_set_tzid_prefix("/citadel.org/");
2569 /* Initialize our hook functions */
2570 CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
2571 CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
2572 CtdlRegisterSessionHook(ical_create_room, EVT_LOGIN);
2573 CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCal commands");
2574 CtdlRegisterSessionHook(ical_session_startup, EVT_START);
2575 CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP);
2576 CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
2577 CtdlRegisterFixedOutputHook("application/ics", ical_fixed_output);
2578 CtdlRegisterCleanupHook(serv_calendar_destroy);
2581 /* return our Subversion id for the Log */