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
811 if (icaltime_is_null_time(t1start)) return(0);
812 if (icaltime_is_null_time(t2start)) return(0);
814 /* if either event lacks end time, assume end = start */
815 if (icaltime_is_null_time(t1end))
816 memcpy(&t1end, &t1start, sizeof(struct icaltimetype));
818 if (t1end.is_date && icaltime_compare(t1start, t1end)) {
820 * the end date is non-inclusive so adjust it by one
821 * day because our test is inclusive, note that a day is
822 * not too much because we are talking about all day
824 * if start = end we assume that nevertheless the whole
827 icaltime_adjust(&t1end, -1, 0, 0, 0);
831 if (icaltime_is_null_time(t2end))
832 memcpy(&t2end, &t2start, sizeof(struct icaltimetype));
834 if (t2end.is_date && icaltime_compare(t2start, t2end)) {
835 icaltime_adjust(&t2end, -1, 0, 0, 0);
839 /* First, check for all-day events */
840 if (t1start.is_date || t2start.is_date) {
841 /* If event 1 ends before event 2 starts, we're in the clear. */
842 if (icaltime_compare_date_only(t1end, t2start) < 0) return(0);
844 /* If event 2 ends before event 1 starts, we're also ok. */
845 if (icaltime_compare_date_only(t2end, t1start) < 0) return(0);
850 /* lprintf (9, "Comparing t1start %d:%d t1end %d:%d t2start %d:%d t2end %d:%d \n",
851 t1start.hour, t1start.minute, t1end.hour, t1end.minute,
852 t2start.hour, t2start.minute, t2end.hour, t2end.minute);
855 /* Now check for overlaps using date *and* time. */
857 /* If event 1 ends before event 2 starts, we're in the clear. */
858 if (icaltime_compare(t1end, t2start) <= 0) return(0);
859 /* lprintf(9, "first passed\n"); */
861 /* If event 2 ends before event 1 starts, we're also ok. */
862 if (icaltime_compare(t2end, t1start) <= 0) return(0);
863 /* lprintf(9, "second passed\n"); */
865 /* Otherwise, they overlap. */
870 * Phase 6 of "hunt for conflicts"
871 * called by ical_conflicts_phase5()
873 * Now both the proposed and existing events have been boiled down to start and end times.
874 * Check for overlap and output any conflicts.
876 * Returns nonzero if a conflict was reported. This allows the caller to stop iterating.
878 int ical_conflicts_phase6(struct icaltimetype t1start,
879 struct icaltimetype t1end,
880 struct icaltimetype t2start,
881 struct icaltimetype t2end,
882 long existing_msgnum,
883 char *conflict_event_uid,
884 char *conflict_event_summary,
887 int conflict_reported = 0;
891 tt = icaltime_as_timet_with_zone(t1start, t1start.zone);
892 CtdlLogPrintf(CTDL_DEBUG, "PROPOSED START: %s", ctime(&tt));
893 tt = icaltime_as_timet_with_zone(t1end, t1end.zone);
894 CtdlLogPrintf(CTDL_DEBUG, " PROPOSED END: %s", ctime(&tt));
895 tt = icaltime_as_timet_with_zone(t2start, t2start.zone);
896 CtdlLogPrintf(CTDL_DEBUG, "EXISTING START: %s", ctime(&tt));
897 tt = icaltime_as_timet_with_zone(t2end, t2end.zone);
898 CtdlLogPrintf(CTDL_DEBUG, " EXISTING END: %s", ctime(&tt));
901 /* compare and output */
903 if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
904 cprintf("%ld||%s|%s|%d|\n",
907 conflict_event_summary,
908 ( ((strlen(compare_uid)>0)
909 &&(!strcasecmp(compare_uid,
910 conflict_event_uid))) ? 1 : 0
913 conflict_reported = 1;
916 return(conflict_reported);
922 * Phase 5 of "hunt for conflicts"
923 * Called by ical_conflicts_phase4()
925 * We have the proposed event boiled down to start and end times.
926 * Now check it against an existing event.
928 void ical_conflicts_phase5(struct icaltimetype t1start,
929 struct icaltimetype t1end,
930 icalcomponent *existing_event,
931 long existing_msgnum,
934 char conflict_event_uid[SIZ];
935 char conflict_event_summary[SIZ];
936 struct icaltimetype t2start, t2end;
939 /* recur variables */
940 icalproperty *rrule = NULL;
941 struct icalrecurrencetype recur;
942 icalrecur_iterator *ritr = NULL;
943 struct icaldurationtype dur;
947 strcpy(conflict_event_uid, "");
948 strcpy(conflict_event_summary, "");
949 t2start = icaltime_null_time();
950 t2end = icaltime_null_time();
952 /* existing event stuff */
953 p = ical_ctdl_get_subprop(existing_event, ICAL_DTSTART_PROPERTY);
954 if (p == NULL) return;
955 if (p != NULL) t2start = icalproperty_get_dtstart(p);
956 if (icaltime_is_utc(t2start)) {
957 t2start.zone = icaltimezone_get_utc_timezone();
960 t2start.zone = icalcomponent_get_timezone(existing_event,
961 icalparameter_get_tzid(
962 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
966 t2start.zone = get_default_icaltimezone();
970 p = ical_ctdl_get_subprop(existing_event, ICAL_DTEND_PROPERTY);
972 t2end = icalproperty_get_dtend(p);
974 if (icaltime_is_utc(t2end)) {
975 t2end.zone = icaltimezone_get_utc_timezone();
978 t2end.zone = icalcomponent_get_timezone(existing_event,
979 icalparameter_get_tzid(
980 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
984 t2end.zone = get_default_icaltimezone();
987 dur = icaltime_subtract(t2end, t2start);
990 rrule = ical_ctdl_get_subprop(existing_event, ICAL_RRULE_PROPERTY);
992 recur = icalproperty_get_rrule(rrule);
993 ritr = icalrecur_iterator_new(recur, t2start);
997 p = ical_ctdl_get_subprop(existing_event, ICAL_UID_PROPERTY);
999 strcpy(conflict_event_uid, icalproperty_get_comment(p));
1002 p = ical_ctdl_get_subprop(existing_event, ICAL_SUMMARY_PROPERTY);
1004 strcpy(conflict_event_summary, icalproperty_get_comment(p));
1007 if (ical_conflicts_phase6(t1start, t1end, t2start, t2end,
1008 existing_msgnum, conflict_event_uid, conflict_event_summary, compare_uid))
1010 num_recur = MAX_RECUR + 1; /* force it out of scope, no need to continue */
1014 t2start = icalrecur_iterator_next(ritr);
1015 if (!icaltime_is_null_time(t2end)) {
1016 const icaltimezone *hold_zone = t2end.zone;
1017 t2end = icaltime_add(t2start, dur);
1018 t2end.zone = hold_zone;
1023 if (icaltime_compare(t2start, t1end) < 0) {
1024 num_recur = MAX_RECUR + 1; /* force it out of scope */
1027 } while ( (rrule) && (!icaltime_is_null_time(t2start)) && (num_recur < MAX_RECUR) );
1028 icalrecur_iterator_free(ritr);
1035 * Phase 4 of "hunt for conflicts"
1036 * Called by ical_hunt_for_conflicts_backend()
1038 * At this point we've got it boiled down to two icalcomponent events in memory.
1039 * If they conflict, output something to the client.
1041 void ical_conflicts_phase4(icalcomponent *proposed_event,
1042 icalcomponent *existing_event,
1043 long existing_msgnum)
1045 struct icaltimetype t1start, t1end;
1046 t1start = icaltime_null_time();
1047 t1end = icaltime_null_time();
1049 char compare_uid[SIZ];
1051 /* recur variables */
1052 icalproperty *rrule = NULL;
1053 struct icalrecurrencetype recur;
1054 icalrecur_iterator *ritr = NULL;
1055 struct icaldurationtype dur;
1058 /* initialization */
1059 strcpy(compare_uid, "");
1061 /* proposed event stuff */
1063 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTSTART_PROPERTY);
1064 if (p == NULL) return;
1065 if (p != NULL) t1start = icalproperty_get_dtstart(p);
1066 if (icaltime_is_utc(t1start)) {
1067 t1start.zone = icaltimezone_get_utc_timezone();
1070 t1start.zone = icalcomponent_get_timezone(proposed_event,
1071 icalparameter_get_tzid(
1072 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1075 if (!t1start.zone) {
1076 t1start.zone = get_default_icaltimezone();
1080 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTEND_PROPERTY);
1082 t1end = icalproperty_get_dtend(p);
1084 if (icaltime_is_utc(t1end)) {
1085 t1end.zone = icaltimezone_get_utc_timezone();
1088 t1end.zone = icalcomponent_get_timezone(proposed_event,
1089 icalparameter_get_tzid(
1090 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1094 t1end.zone = get_default_icaltimezone();
1098 dur = icaltime_subtract(t1end, t1start);
1101 rrule = ical_ctdl_get_subprop(proposed_event, ICAL_RRULE_PROPERTY);
1103 recur = icalproperty_get_rrule(rrule);
1104 ritr = icalrecur_iterator_new(recur, t1start);
1107 p = ical_ctdl_get_subprop(proposed_event, ICAL_UID_PROPERTY);
1109 strcpy(compare_uid, icalproperty_get_comment(p));
1113 ical_conflicts_phase5(t1start, t1end, existing_event, existing_msgnum, compare_uid);
1116 t1start = icalrecur_iterator_next(ritr);
1117 if (!icaltime_is_null_time(t1end)) {
1118 const icaltimezone *hold_zone = t1end.zone;
1119 t1end = icaltime_add(t1start, dur);
1120 t1end.zone = hold_zone;
1125 } while ( (rrule) && (!icaltime_is_null_time(t1start)) && (num_recur < MAX_RECUR) );
1126 icalrecur_iterator_free(ritr);
1132 * Phase 3 of "hunt for conflicts"
1133 * Called by ical_hunt_for_conflicts()
1135 void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
1136 icalcomponent *proposed_event;
1137 struct CtdlMessage *msg = NULL;
1138 struct ical_respond_data ird;
1140 proposed_event = (icalcomponent *)data;
1142 msg = CtdlFetchMessage(msgnum, 1);
1143 if (msg == NULL) return;
1144 memset(&ird, 0, sizeof ird);
1145 strcpy(ird.desired_partnum, "_HUNT_");
1146 mime_parser(msg->cm_fields['M'],
1148 *ical_locate_part, /* callback function */
1150 (void *) &ird, /* user data */
1153 CtdlFreeMessage(msg);
1155 if (ird.cal == NULL) return;
1157 ical_conflicts_phase4(proposed_event, ird.cal, msgnum);
1158 icalcomponent_free(ird.cal);
1164 * Phase 2 of "hunt for conflicts" operation.
1165 * At this point we have a calendar object which represents the VEVENT that
1166 * is proposed for addition to the calendar. Now hunt through the user's
1167 * calendar room, and output zero or more existing VEVENTs which conflict
1170 void ical_hunt_for_conflicts(icalcomponent *cal) {
1171 char hold_rm[ROOMNAMELEN];
1173 strcpy(hold_rm, CC->room.QRname); /* save current room */
1175 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
1176 getroom(&CC->room, hold_rm);
1177 cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
1181 cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
1183 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1186 ical_hunt_for_conflicts_backend,
1191 getroom(&CC->room, hold_rm); /* return to saved room */
1198 * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
1200 void ical_conflicts(long msgnum, char *partnum) {
1201 struct CtdlMessage *msg = NULL;
1202 struct ical_respond_data ird;
1204 msg = CtdlFetchMessage(msgnum, 1);
1206 cprintf("%d Message %ld not found\n",
1207 ERROR + ILLEGAL_VALUE,
1213 memset(&ird, 0, sizeof ird);
1214 strcpy(ird.desired_partnum, partnum);
1215 mime_parser(msg->cm_fields['M'],
1217 *ical_locate_part, /* callback function */
1219 (void *) &ird, /* user data */
1223 CtdlFreeMessage(msg);
1225 if (ird.cal != NULL) {
1226 ical_hunt_for_conflicts(ird.cal);
1227 icalcomponent_free(ird.cal);
1231 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
1237 * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
1239 * fb The VFREEBUSY component to which we are appending
1240 * top_level_cal The top-level VCALENDAR component which contains a VEVENT to be added
1242 void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
1246 struct icalperiodtype this_event_period = icalperiodtype_null_period();
1247 icaltimetype dtstart = icaltime_null_time();
1248 icaltimetype dtend = icaltime_null_time();
1250 /* recur variables */
1251 icalproperty *rrule = NULL;
1252 struct icalrecurrencetype recur;
1253 icalrecur_iterator *ritr = NULL;
1254 struct icaldurationtype dur;
1257 if (!top_level_cal) return;
1259 /* Find the VEVENT component containing an event */
1260 cal = icalcomponent_get_first_component(top_level_cal, ICAL_VEVENT_COMPONENT);
1263 /* If this event is not opaque, the user isn't publishing it as
1264 * busy time, so don't bother doing anything else.
1266 p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
1268 v = icalproperty_get_value(p);
1270 if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
1277 * Now begin calculating the event start and end times.
1279 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
1281 dtstart = icalproperty_get_dtstart(p);
1283 if (icaltime_is_utc(dtstart)) {
1284 dtstart.zone = icaltimezone_get_utc_timezone();
1287 dtstart.zone = icalcomponent_get_timezone(top_level_cal,
1288 icalparameter_get_tzid(
1289 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1292 if (!dtstart.zone) {
1293 dtstart.zone = get_default_icaltimezone();
1297 dtend = icalcomponent_get_dtend(cal);
1298 if (!icaltime_is_null_time(dtend)) {
1299 dur = icaltime_subtract(dtend, dtstart);
1302 /* Is a recurrence specified? If so, get ready to process it... */
1303 rrule = ical_ctdl_get_subprop(cal, ICAL_RRULE_PROPERTY);
1305 recur = icalproperty_get_rrule(rrule);
1306 ritr = icalrecur_iterator_new(recur, dtstart);
1310 /* Convert the DTSTART and DTEND properties to an icalperiod. */
1311 this_event_period.start = dtstart;
1313 if (!icaltime_is_null_time(dtend)) {
1314 this_event_period.end = dtend;
1317 /* Convert the timestamps to UTC. It's ok to do this because we've already expanded
1318 * recurrences and this data is never going to get used again.
1320 this_event_period.start = icaltime_convert_to_zone(
1321 this_event_period.start,
1322 icaltimezone_get_utc_timezone()
1324 this_event_period.end = icaltime_convert_to_zone(
1325 this_event_period.end,
1326 icaltimezone_get_utc_timezone()
1330 icalcomponent_add_property(fb, icalproperty_new_freebusy(this_event_period));
1332 /* Make sure the DTSTART property of the freebusy *list* is set to
1333 * the DTSTART property of the *earliest event*.
1335 p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
1337 icalcomponent_set_dtstart(fb, this_event_period.start);
1340 if (icaltime_compare(this_event_period.start, icalcomponent_get_dtstart(fb)) < 0) {
1341 icalcomponent_set_dtstart(fb, this_event_period.start);
1345 /* Make sure the DTEND property of the freebusy *list* is set to
1346 * the DTEND property of the *latest event*.
1348 p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
1350 icalcomponent_set_dtend(fb, this_event_period.end);
1353 if (icaltime_compare(this_event_period.end, icalcomponent_get_dtend(fb)) > 0) {
1354 icalcomponent_set_dtend(fb, this_event_period.end);
1359 dtstart = icalrecur_iterator_next(ritr);
1360 if (!icaltime_is_null_time(dtend)) {
1361 dtend = icaltime_add(dtstart, dur);
1362 dtend.zone = dtstart.zone;
1363 dtend.is_utc = dtstart.is_utc;
1368 } while ( (rrule) && (!icaltime_is_null_time(dtstart)) && (num_recur < MAX_RECUR) ) ;
1369 icalrecur_iterator_free(ritr);
1375 * Backend for ical_freebusy()
1377 * This function simply loads the messages in the user's calendar room,
1378 * which contain VEVENTs, then strips them of all non-freebusy data, and
1379 * adds them to the supplied VCALENDAR.
1382 void ical_freebusy_backend(long msgnum, void *data) {
1384 struct CtdlMessage *msg = NULL;
1385 struct ical_respond_data ird;
1387 fb = (icalcomponent *)data; /* User-supplied data will be the VFREEBUSY component */
1389 msg = CtdlFetchMessage(msgnum, 1);
1390 if (msg == NULL) return;
1391 memset(&ird, 0, sizeof ird);
1392 strcpy(ird.desired_partnum, "_HUNT_");
1393 mime_parser(msg->cm_fields['M'],
1395 *ical_locate_part, /* callback function */
1397 (void *) &ird, /* user data */
1400 CtdlFreeMessage(msg);
1403 ical_add_to_freebusy(fb, ird.cal); /* Add VEVENT times to VFREEBUSY */
1404 icalcomponent_free(ird.cal);
1411 * Grab another user's free/busy times
1413 void ical_freebusy(char *who) {
1414 struct ctdluser usbuf;
1415 char calendar_room_name[ROOMNAMELEN];
1416 char hold_rm[ROOMNAMELEN];
1417 char *serialized_request = NULL;
1418 icalcomponent *encaps = NULL;
1419 icalcomponent *fb = NULL;
1420 int found_user = (-1);
1421 struct recptypes *recp = NULL;
1426 int config_lines = 0;
1428 /* First try an exact match. */
1429 found_user = getuser(&usbuf, who);
1431 /* If not found, try it as an unqualified email address. */
1432 if (found_user != 0) {
1434 recp = validate_recipients(buf, NULL, 0);
1435 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1437 if (recp->num_local == 1) {
1438 found_user = getuser(&usbuf, recp->recp_local);
1440 free_recipients(recp);
1444 /* If still not found, try it as an address qualified with the
1445 * primary FQDN of this Citadel node.
1447 if (found_user != 0) {
1448 snprintf(buf, sizeof buf, "%s@%s", who, config.c_fqdn);
1449 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1450 recp = validate_recipients(buf, NULL, 0);
1452 if (recp->num_local == 1) {
1453 found_user = getuser(&usbuf, recp->recp_local);
1455 free_recipients(recp);
1459 /* Still not found? Try qualifying it with every domain we
1460 * might have addresses in.
1462 if (found_user != 0) {
1463 config_lines = num_tokens(inetcfg, '\n');
1464 for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
1465 extract_token(buf, inetcfg, i, '\n', sizeof buf);
1466 extract_token(host, buf, 0, '|', sizeof host);
1467 extract_token(type, buf, 1, '|', sizeof type);
1469 if ( (!strcasecmp(type, "localhost"))
1470 || (!strcasecmp(type, "directory")) ) {
1471 snprintf(buf, sizeof buf, "%s@%s", who, host);
1472 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1473 recp = validate_recipients(buf, NULL, 0);
1475 if (recp->num_local == 1) {
1476 found_user = getuser(&usbuf, recp->recp_local);
1478 free_recipients(recp);
1484 if (found_user != 0) {
1485 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
1489 MailboxName(calendar_room_name, sizeof calendar_room_name,
1490 &usbuf, USERCALENDARROOM);
1492 strcpy(hold_rm, CC->room.QRname); /* save current room */
1494 if (getroom(&CC->room, calendar_room_name) != 0) {
1495 cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
1496 getroom(&CC->room, hold_rm);
1500 /* Create a VFREEBUSY subcomponent */
1501 CtdlLogPrintf(CTDL_DEBUG, "Creating VFREEBUSY component\n");
1502 fb = icalcomponent_new_vfreebusy();
1504 cprintf("%d Internal error: cannot allocate memory.\n",
1505 ERROR + INTERNAL_ERROR);
1506 getroom(&CC->room, hold_rm);
1510 /* Set the method to PUBLISH */
1511 icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
1513 /* Set the DTSTAMP to right now. */
1514 icalcomponent_set_dtstamp(fb, icaltime_from_timet(time(NULL), 0));
1516 /* Add the user's email address as ORGANIZER */
1517 sprintf(buf, "MAILTO:%s", who);
1518 if (strchr(buf, '@') == NULL) {
1520 strcat(buf, config.c_fqdn);
1522 for (i=0; buf[i]; ++i) {
1523 if (buf[i]==' ') buf[i] = '_';
1525 icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
1527 /* Add busy time from events */
1528 CtdlLogPrintf(CTDL_DEBUG, "Adding busy time from events\n");
1529 CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
1531 /* If values for DTSTART and DTEND are still not present, set them
1532 * to yesterday and tomorrow as default values.
1534 if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
1535 icalcomponent_set_dtstart(fb, icaltime_from_timet(time(NULL)-86400L, 0));
1537 if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
1538 icalcomponent_set_dtend(fb, icaltime_from_timet(time(NULL)+86400L, 0));
1541 /* Put the freebusy component into the calendar component */
1542 CtdlLogPrintf(CTDL_DEBUG, "Encapsulating\n");
1543 encaps = ical_encapsulate_subcomponent(fb);
1544 if (encaps == NULL) {
1545 icalcomponent_free(fb);
1546 cprintf("%d Internal error: cannot allocate memory.\n",
1547 ERROR + INTERNAL_ERROR);
1548 getroom(&CC->room, hold_rm);
1552 /* Set the method to PUBLISH */
1553 CtdlLogPrintf(CTDL_DEBUG, "Setting method\n");
1554 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1557 CtdlLogPrintf(CTDL_DEBUG, "Serializing\n");
1558 serialized_request = icalcomponent_as_ical_string_r(encaps);
1559 icalcomponent_free(encaps); /* Don't need this anymore. */
1561 cprintf("%d Free/busy for %s\n", LISTING_FOLLOWS, usbuf.fullname);
1562 if (serialized_request != NULL) {
1563 client_write(serialized_request, strlen(serialized_request));
1564 free(serialized_request);
1568 /* Go back to the room from which we came... */
1569 getroom(&CC->room, hold_rm);
1575 * Backend for ical_getics()
1577 * This is a ForEachMessage() callback function that searches the current room
1578 * for calendar events and adds them each into one big calendar component.
1580 void ical_getics_backend(long msgnum, void *data) {
1581 icalcomponent *encaps, *c;
1582 struct CtdlMessage *msg = NULL;
1583 struct ical_respond_data ird;
1585 encaps = (icalcomponent *)data;
1586 if (encaps == NULL) return;
1588 /* Look for the calendar event... */
1590 msg = CtdlFetchMessage(msgnum, 1);
1591 if (msg == NULL) return;
1592 memset(&ird, 0, sizeof ird);
1593 strcpy(ird.desired_partnum, "_HUNT_");
1594 mime_parser(msg->cm_fields['M'],
1596 *ical_locate_part, /* callback function */
1598 (void *) &ird, /* user data */
1601 CtdlFreeMessage(msg);
1603 if (ird.cal == NULL) return;
1605 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1606 * are responsible for "the_request"'s memory -- it will be freed
1607 * when we free "encaps".
1610 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1611 * in. This will almost never happen.
1613 if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
1614 icalcomponent_add_component(encaps, ird.cal);
1617 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1618 * and other components encapsulated inside, we have to extract them.
1621 for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
1623 c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
1625 /* For VTIMEZONE components, suppress duplicates of the same tzid */
1627 if (icalcomponent_isa(c) == ICAL_VTIMEZONE_COMPONENT) {
1628 icalproperty *p = icalcomponent_get_first_property(c, ICAL_TZID_PROPERTY);
1630 const char *tzid = icalproperty_get_tzid(p);
1631 if (!icalcomponent_get_timezone(encaps, tzid)) {
1632 icalcomponent_add_component(encaps,
1633 icalcomponent_new_clone(c));
1638 /* All other types of components can go in verbatim */
1640 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1643 icalcomponent_free(ird.cal);
1650 * Retrieve all of the calendar items in the current room, and output them
1651 * as a single icalendar object.
1653 void ical_getics(void)
1655 icalcomponent *encaps = NULL;
1658 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1659 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1660 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1661 return; /* Not an iCalendar-centric room */
1664 encaps = icalcomponent_new_vcalendar();
1665 if (encaps == NULL) {
1666 CtdlLogPrintf(CTDL_ALERT, "ERROR: could not allocate component!\n");
1667 cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
1671 cprintf("%d one big calendar\n", LISTING_FOLLOWS);
1673 /* Set the Product ID */
1674 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1676 /* Set the Version Number */
1677 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1679 /* Set the method to PUBLISH */
1680 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1682 /* Now go through the room encapsulating all calendar items. */
1683 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1686 ical_getics_backend,
1690 ser = icalcomponent_as_ical_string_r(encaps);
1691 icalcomponent_free(encaps); /* Don't need this anymore. */
1692 client_write(ser, strlen(ser));
1699 * Helper callback function for ical_putics() to discover which TZID's we need.
1700 * Simply put the tzid name string into a hash table. After the callbacks are
1701 * done we'll go through them and attach the ones that we have.
1703 void ical_putics_grabtzids(icalparameter *param, void *data)
1705 const char *tzid = icalparameter_get_tzid(param);
1706 HashList *keys = (HashList *) data;
1708 if ( (keys) && (tzid) && (!IsEmptyStr(tzid)) ) {
1709 Put(keys, tzid, strlen(tzid), strdup(tzid), generic_free_handler);
1715 * Delete all of the calendar items in the current room, and replace them
1716 * with calendar items from a client-supplied data stream.
1718 void ical_putics(void)
1720 char *calstream = NULL;
1723 icalcomponent *encaps = NULL;
1724 HashList *tzidlist = NULL;
1730 /* Only allow this operation if we're in a room containing a calendar or tasks view */
1731 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1732 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1733 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1737 /* Only allow this operation if we have permission to overwrite the existing calendar */
1738 if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
1739 cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
1743 cprintf("%d Transmit data now\n", SEND_LISTING);
1744 calstream = CtdlReadMessageBody("000", config.c_maxmsglen, NULL, 0, 0);
1745 if (calstream == NULL) {
1749 cal = icalcomponent_new_from_string(calstream);
1752 /* We got our data stream -- now do something with it. */
1754 /* Delete the existing messages in the room, because we are overwriting
1755 * the entire calendar with an entire new (or updated) calendar.
1756 * (Careful: this opens an S_ROOMS critical section!)
1758 CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
1760 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1761 * in. This will almost never happen.
1763 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
1764 ical_write_to_cal(NULL, cal);
1767 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1768 * and other components encapsulated inside, we have to extract them.
1771 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1773 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1775 /* Non-VTIMEZONE components each get written as individual messages.
1776 * But we also need to attach the relevant VTIMEZONE components to them.
1778 if ( (icalcomponent_isa(c) != ICAL_VTIMEZONE_COMPONENT)
1779 && (encaps = icalcomponent_new_vcalendar()) ) {
1780 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1781 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1782 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1784 /* Attach any needed timezones here */
1785 tzidlist = NewHash(1, NULL);
1787 icalcomponent_foreach_tzid(c, ical_putics_grabtzids, tzidlist);
1789 HashPos = GetNewHashPos(tzidlist, 0);
1791 while (GetNextHashPos(tzidlist, HashPos, &len, &Key, &Value)) {
1792 CtdlLogPrintf(CTDL_DEBUG, "Attaching timezone '%s'\n", Value);
1793 icaltimezone *t = NULL;
1795 /* First look for a timezone attached to the original calendar */
1796 t = icalcomponent_get_timezone(cal, Value);
1798 /* Try built-in tzdata if the right one wasn't attached */
1800 t = icaltimezone_get_builtin_timezone(Value);
1803 /* I've got a valid timezone to attach. */
1805 icalcomponent_add_component(encaps,
1806 icalcomponent_new_clone(
1807 icaltimezone_get_component(t)
1813 DeleteHashPos(&HashPos);
1814 DeleteHash(&tzidlist);
1816 /* Now attach the component itself (usually a VEVENT or VTODO) */
1817 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1819 /* Write it to the message store */
1820 ical_write_to_cal(NULL, encaps);
1821 icalcomponent_free(encaps);
1826 icalcomponent_free(cal);
1831 * All Citadel calendar commands from the client come through here.
1833 void cmd_ical(char *argbuf)
1841 extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
1843 /* Allow "test" and "freebusy" subcommands without logging in. */
1845 if (!strcasecmp(subcmd, "test")) {
1846 cprintf("%d This server supports calendaring\n", CIT_OK);
1850 if (!strcasecmp(subcmd, "freebusy")) {
1851 extract_token(who, argbuf, 1, '|', sizeof who);
1856 if (!strcasecmp(subcmd, "sgi")) {
1857 CIT_ICAL->server_generated_invitations =
1858 (extract_int(argbuf, 1) ? 1 : 0) ;
1860 CIT_OK, CIT_ICAL->server_generated_invitations);
1864 if (CtdlAccessCheck(ac_logged_in)) return;
1866 if (!strcasecmp(subcmd, "respond")) {
1867 msgnum = extract_long(argbuf, 1);
1868 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1869 extract_token(action, argbuf, 3, '|', sizeof action);
1870 ical_respond(msgnum, partnum, action);
1874 if (!strcasecmp(subcmd, "handle_rsvp")) {
1875 msgnum = extract_long(argbuf, 1);
1876 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1877 extract_token(action, argbuf, 3, '|', sizeof action);
1878 ical_handle_rsvp(msgnum, partnum, action);
1882 if (!strcasecmp(subcmd, "conflicts")) {
1883 msgnum = extract_long(argbuf, 1);
1884 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1885 ical_conflicts(msgnum, partnum);
1889 if (!strcasecmp(subcmd, "getics")) {
1894 if (!strcasecmp(subcmd, "putics")) {
1899 cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
1905 * We don't know if the calendar room exists so we just create it at login
1907 void ical_create_room(void)
1912 /* Create the calendar room if it doesn't already exist */
1913 create_room(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
1915 /* Set expiration policy to manual; otherwise objects will be lost! */
1916 if (lgetroom(&qr, USERCALENDARROOM)) {
1917 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1920 qr.QRep.expire_mode = EXPIRE_MANUAL;
1921 qr.QRdefaultview = VIEW_CALENDAR; /* 3 = calendar view */
1924 /* Set the view to a calendar view */
1925 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1926 vbuf.v_view = VIEW_CALENDAR;
1927 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1929 /* Create the tasks list room if it doesn't already exist */
1930 create_room(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
1932 /* Set expiration policy to manual; otherwise objects will be lost! */
1933 if (lgetroom(&qr, USERTASKSROOM)) {
1934 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1937 qr.QRep.expire_mode = EXPIRE_MANUAL;
1938 qr.QRdefaultview = VIEW_TASKS;
1941 /* Set the view to a task list view */
1942 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1943 vbuf.v_view = VIEW_TASKS;
1944 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1946 /* Create the notes room if it doesn't already exist */
1947 create_room(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
1949 /* Set expiration policy to manual; otherwise objects will be lost! */
1950 if (lgetroom(&qr, USERNOTESROOM)) {
1951 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1954 qr.QRep.expire_mode = EXPIRE_MANUAL;
1955 qr.QRdefaultview = VIEW_NOTES;
1958 /* Set the view to a notes view */
1959 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1960 vbuf.v_view = VIEW_NOTES;
1961 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1968 * ical_send_out_invitations() is called by ical_saving_vevent() when it finds a VEVENT.
1970 * top_level_cal is the highest available level calendar object.
1971 * cal is the subcomponent containing the VEVENT.
1973 * Note: if you change the encapsulation code here, change it in WebCit's ical_encapsulate_subcomponent()
1975 void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal) {
1976 icalcomponent *the_request = NULL;
1977 char *serialized_request = NULL;
1978 icalcomponent *encaps = NULL;
1979 char *request_message_text = NULL;
1980 struct CtdlMessage *msg = NULL;
1981 struct recptypes *valid = NULL;
1982 char attendees_string[SIZ];
1983 int num_attendees = 0;
1984 char this_attendee[256];
1985 icalproperty *attendee = NULL;
1986 char summary_string[SIZ];
1987 icalproperty *summary = NULL;
1990 struct icaltimetype t;
1991 const icaltimezone *attached_zones[5] = { NULL, NULL, NULL, NULL, NULL };
1993 const icaltimezone *z;
1994 int num_zones_attached = 0;
1995 int zone_already_attached;
1996 icalparameter *tzidp = NULL;
1997 const char *tzidc = NULL;
2000 CtdlLogPrintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
2005 /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
2006 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
2007 ical_send_out_invitations(top_level_cal,
2008 icalcomponent_get_first_component(
2009 cal, ICAL_VEVENT_COMPONENT
2015 /* Clone the event */
2016 the_request = icalcomponent_new_clone(cal);
2017 if (the_request == NULL) {
2018 CtdlLogPrintf(CTDL_ERR, "ERROR: cannot clone calendar object\n");
2022 /* Extract the summary string -- we'll use it as the
2023 * message subject for the request
2025 strcpy(summary_string, "Meeting request");
2026 summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
2027 if (summary != NULL) {
2028 if (icalproperty_get_summary(summary)) {
2029 strcpy(summary_string,
2030 icalproperty_get_summary(summary) );
2034 /* Determine who the recipients of this message are (the attendees) */
2035 strcpy(attendees_string, "");
2036 for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
2037 if (icalproperty_get_attendee(attendee)) {
2038 safestrncpy(this_attendee, icalproperty_get_attendee(attendee), sizeof this_attendee);
2039 if (!strncasecmp(this_attendee, "MAILTO:", 7)) {
2040 strcpy(this_attendee, &this_attendee[7]);
2042 if (!CtdlIsMe(this_attendee, sizeof this_attendee)) { /* don't send an invitation to myself! */
2043 snprintf(&attendees_string[strlen(attendees_string)],
2044 sizeof(attendees_string) - strlen(attendees_string),
2054 CtdlLogPrintf(CTDL_DEBUG, "<%d> attendees: <%s>\n", num_attendees, attendees_string);
2056 /* If there are no attendees, there are no invitations to send, so...
2057 * don't bother putting one together! Punch out, Maverick!
2059 if (num_attendees == 0) {
2060 icalcomponent_free(the_request);
2064 /* Encapsulate the VEVENT component into a complete VCALENDAR */
2065 encaps = icalcomponent_new_vcalendar();
2066 if (encaps == NULL) {
2067 CtdlLogPrintf(CTDL_ALERT, "ERROR: could not allocate component!\n");
2068 icalcomponent_free(the_request);
2072 /* Set the Product ID */
2073 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
2075 /* Set the Version Number */
2076 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
2078 /* Set the method to REQUEST */
2079 icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
2081 /* Look for properties containing timezone parameters, to see if we need to attach VTIMEZONEs */
2082 for (p = icalcomponent_get_first_property(the_request, ICAL_ANY_PROPERTY);
2084 p = icalcomponent_get_next_property(the_request, ICAL_ANY_PROPERTY))
2086 if ( (icalproperty_isa(p) == ICAL_COMPLETED_PROPERTY)
2087 || (icalproperty_isa(p) == ICAL_CREATED_PROPERTY)
2088 || (icalproperty_isa(p) == ICAL_DATEMAX_PROPERTY)
2089 || (icalproperty_isa(p) == ICAL_DATEMIN_PROPERTY)
2090 || (icalproperty_isa(p) == ICAL_DTEND_PROPERTY)
2091 || (icalproperty_isa(p) == ICAL_DTSTAMP_PROPERTY)
2092 || (icalproperty_isa(p) == ICAL_DTSTART_PROPERTY)
2093 || (icalproperty_isa(p) == ICAL_DUE_PROPERTY)
2094 || (icalproperty_isa(p) == ICAL_EXDATE_PROPERTY)
2095 || (icalproperty_isa(p) == ICAL_LASTMODIFIED_PROPERTY)
2096 || (icalproperty_isa(p) == ICAL_MAXDATE_PROPERTY)
2097 || (icalproperty_isa(p) == ICAL_MINDATE_PROPERTY)
2098 || (icalproperty_isa(p) == ICAL_RECURRENCEID_PROPERTY)
2100 t = icalproperty_get_dtstart(p); // it's safe to use dtstart for all of them
2102 /* Determine the tzid in order for some of the conditions below to work */
2103 tzidp = icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER);
2105 tzidc = icalparameter_get_tzid(tzidp);
2111 /* First see if there's a timezone attached to the data structure itself */
2112 if (icaltime_is_utc(t)) {
2113 z = icaltimezone_get_utc_timezone();
2116 z = icaltime_get_timezone(t);
2119 /* If not, try to determine the tzid from the parameter using attached zones */
2120 if ((!z) && (tzidc)) {
2121 z = icalcomponent_get_timezone(top_level_cal, tzidc);
2124 /* Still no good? Try our internal database */
2125 if ((!z) && (tzidc)) {
2126 z = icaltimezone_get_builtin_timezone_from_tzid(tzidc);
2130 /* We have a valid timezone. Good. Now we need to attach it. */
2132 zone_already_attached = 0;
2133 for (i=0; i<5; ++i) {
2134 if (z == attached_zones[i]) {
2135 /* We've already got this one, no need to attach another. */
2136 ++zone_already_attached;
2139 if ((!zone_already_attached) && (num_zones_attached < 5)) {
2140 /* This is a new one, so attach it. */
2141 attached_zones[num_zones_attached++] = z;
2144 icalproperty_set_parameter(p,
2145 icalparameter_new_tzid(icaltimezone_get_tzid(z))
2151 /* Encapsulate any timezones we need */
2152 if (num_zones_attached > 0) for (i=0; i<num_zones_attached; ++i) {
2154 zc = icalcomponent_new_clone(icaltimezone_get_component(attached_zones[i]));
2155 icalcomponent_add_component(encaps, zc);
2158 /* Here we go: encapsulate the VEVENT into the VCALENDAR. We now no longer
2159 * are responsible for "the_request"'s memory -- it will be freed
2160 * when we free "encaps".
2162 icalcomponent_add_component(encaps, the_request);
2165 serialized_request = icalcomponent_as_ical_string_r(encaps);
2166 icalcomponent_free(encaps); /* Don't need this anymore. */
2167 if (serialized_request == NULL) return;
2169 reqsize = strlen(serialized_request) + SIZ;
2170 request_message_text = malloc(reqsize);
2171 if (request_message_text != NULL) {
2172 snprintf(request_message_text, reqsize,
2173 "Content-type: text/calendar\r\n\r\n%s\r\n",
2177 msg = CtdlMakeMessage(
2179 NULL, /* No single recipient here */
2180 NULL, /* No single recipient here */
2186 summary_string, /* Use summary for subject */
2188 request_message_text,
2193 valid = validate_recipients(attendees_string, NULL, 0);
2194 CtdlSubmitMsg(msg, valid, "", QP_EADDR);
2195 CtdlFreeMessage(msg);
2196 free_recipients(valid);
2199 free(serialized_request);
2204 * When a calendar object is being saved, determine whether it's a VEVENT
2205 * and the user saving it is the organizer. If so, send out invitations
2206 * to any listed attendees.
2208 * This function is recursive. The caller can simply supply the same object
2209 * as both arguments. When it recurses it will alter the second argument
2210 * while holding on to the top level object. This allows us to go back and
2211 * grab things like time zones which might be attached.
2214 void ical_saving_vevent(icalcomponent *top_level_cal, icalcomponent *cal) {
2216 icalproperty *organizer = NULL;
2217 char organizer_string[SIZ];
2219 CtdlLogPrintf(CTDL_DEBUG, "ical_saving_vevent() has been called!\n");
2221 /* Don't send out invitations unless the client wants us to. */
2222 if (CIT_ICAL->server_generated_invitations == 0) {
2226 /* Don't send out invitations if we've been asked not to. */
2227 if (CIT_ICAL->avoid_sending_invitations > 0) {
2231 strcpy(organizer_string, "");
2233 * The VEVENT subcomponent is the one we're interested in.
2234 * Send out invitations if, and only if, this user is the Organizer.
2236 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
2237 organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
2238 if (organizer != NULL) {
2239 if (icalproperty_get_organizer(organizer)) {
2240 strcpy(organizer_string,
2241 icalproperty_get_organizer(organizer));
2244 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
2245 strcpy(organizer_string, &organizer_string[7]);
2246 striplt(organizer_string);
2248 * If the user saving the event is listed as the
2249 * organizer, then send out invitations.
2251 if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
2252 ical_send_out_invitations(top_level_cal, cal);
2257 /* If the component has subcomponents, recurse through them. */
2258 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2260 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2261 /* Recursively process subcomponent */
2262 ical_saving_vevent(top_level_cal, c);
2270 * Back end for ical_obj_beforesave()
2271 * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
2272 * the summary of the event (becomes message subject),
2273 * and the start time (becomes message date/time).
2275 void ical_obj_beforesave_backend(char *name, char *filename, char *partnum,
2276 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2277 char *encoding, char *cbid, void *cbuserdata)
2279 icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
2281 char new_uid[256] = "";
2282 char buf[1024] = "";
2283 struct CtdlMessage *msg = (struct CtdlMessage *) cbuserdata;
2287 /* We're only interested in calendar data. */
2288 if ( (strcasecmp(cbtype, "text/calendar"))
2289 && (strcasecmp(cbtype, "application/ics")) ) {
2293 /* Hunt for the UID and drop it in
2294 * the "user data" pointer for the MIME parser. When
2295 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2298 whole_cal = icalcomponent_new_from_string(content);
2301 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
2302 nested_event = icalcomponent_get_first_component(
2303 cal, ICAL_VEVENT_COMPONENT);
2304 if (nested_event != NULL) {
2308 nested_todo = icalcomponent_get_first_component(
2309 cal, ICAL_VTODO_COMPONENT);
2310 if (nested_todo != NULL) {
2318 /* Set the message EUID to the iCalendar UID */
2320 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2322 /* If there's no uid we must generate one */
2323 generate_uuid(new_uid);
2324 icalcomponent_add_property(cal, icalproperty_new_uid(new_uid));
2325 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2328 safestrncpy(buf, icalproperty_get_comment(p), sizeof buf);
2329 if (!IsEmptyStr(buf)) {
2330 if (msg->cm_fields['E'] != NULL) {
2331 free(msg->cm_fields['E']);
2333 msg->cm_fields['E'] = strdup(buf);
2334 CtdlLogPrintf(CTDL_DEBUG, "Saving calendar UID <%s>\n", buf);
2338 /* Set the message subject to the iCalendar summary */
2340 p = ical_ctdl_get_subprop(cal, ICAL_SUMMARY_PROPERTY);
2342 safestrncpy(buf, icalproperty_get_comment(p), sizeof buf);
2343 if (!IsEmptyStr(buf)) {
2344 if (msg->cm_fields['U'] != NULL) {
2345 free(msg->cm_fields['U']);
2347 msg->cm_fields['U'] = strdup(buf);
2351 /* Set the message date/time to the iCalendar start time */
2353 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
2356 idtstart = icaltime_as_timet(icalproperty_get_dtstart(p));
2358 if (msg->cm_fields['T'] != NULL) {
2359 free(msg->cm_fields['T']);
2361 msg->cm_fields['T'] = strdup("000000000000000000");
2362 sprintf(msg->cm_fields['T'], "%ld", idtstart);
2367 icalcomponent_free(cal);
2368 if (whole_cal != cal) {
2369 icalcomponent_free(whole_cal);
2378 * See if we need to prevent the object from being saved (we don't allow
2379 * MIME types other than text/calendar in "calendar" or "tasks" rooms).
2381 * If the message is being saved, we also set various message header fields
2382 * using data found in the iCalendar object.
2384 int ical_obj_beforesave(struct CtdlMessage *msg)
2386 /* First determine if this is a calendar or tasks room */
2387 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
2388 && (CC->room.QRdefaultview != VIEW_TASKS)
2390 return(0); /* Not an iCalendar-centric room */
2393 /* It must be an RFC822 message! */
2394 if (msg->cm_format_type != 4) {
2395 CtdlLogPrintf(CTDL_DEBUG, "Rejecting non-RFC822 message\n");
2396 return(1); /* You tried to save a non-RFC822 message! */
2399 if (msg->cm_fields['M'] == NULL) {
2400 return(1); /* You tried to save a null message! */
2403 /* Do all of our lovely back-end parsing */
2404 mime_parser(msg->cm_fields['M'],
2406 *ical_obj_beforesave_backend,
2417 * Things we need to do after saving a calendar event.
2419 void ical_obj_aftersave_backend(char *name, char *filename, char *partnum,
2420 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2421 char *encoding, char *cbid, void *cbuserdata)
2425 /* We're only interested in calendar items here. */
2426 if ( (strcasecmp(cbtype, "text/calendar"))
2427 && (strcasecmp(cbtype, "application/ics")) ) {
2431 /* Hunt for the UID and drop it in
2432 * the "user data" pointer for the MIME parser. When
2433 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2436 if ( (!strcasecmp(cbtype, "text/calendar"))
2437 || (!strcasecmp(cbtype, "application/ics")) ) {
2438 cal = icalcomponent_new_from_string(content);
2440 ical_saving_vevent(cal, cal);
2441 icalcomponent_free(cal);
2448 * Things we need to do after saving a calendar event.
2449 * (This will start back end tasks such as automatic generation of invitations,
2450 * if such actions are appropriate.)
2452 int ical_obj_aftersave(struct CtdlMessage *msg)
2454 char roomname[ROOMNAMELEN];
2457 * If this isn't the Calendar> room, no further action is necessary.
2460 /* First determine if this is our room */
2461 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
2462 if (strcasecmp(roomname, CC->room.QRname)) {
2463 return(0); /* Not the Calendar room -- don't do anything. */
2466 /* It must be an RFC822 message! */
2467 if (msg->cm_format_type != 4) return(1);
2469 /* Reject null messages */
2470 if (msg->cm_fields['M'] == NULL) return(1);
2472 /* Now recurse through it looking for our icalendar data */
2473 mime_parser(msg->cm_fields['M'],
2475 *ical_obj_aftersave_backend,
2485 void ical_session_startup(void) {
2486 CIT_ICAL = malloc(sizeof(struct cit_ical));
2487 memset(CIT_ICAL, 0, sizeof(struct cit_ical));
2490 void ical_session_shutdown(void) {
2496 * Back end for ical_fixed_output()
2498 void ical_fixed_output_backend(icalcomponent *cal,
2505 p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
2507 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2510 p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
2512 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2515 p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
2517 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2520 /* If the component has attendees, iterate through them. */
2521 for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
2522 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
2523 if (!strncasecmp(buf, "MAILTO:", 7)) {
2525 /* screen name or email address */
2526 strcpy(buf, &buf[7]);
2528 cprintf("%s ", buf);
2533 /* If the component has subcomponents, recurse through them. */
2534 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2536 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2537 /* Recursively process subcomponent */
2538 ical_fixed_output_backend(c, recursion_level+1);
2545 * Function to output iCalendar data as plain text. Nobody uses MSG0
2546 * anymore, so really this is just so we expose the vCard data to the full
2549 void ical_fixed_output(char *ptr, int len) {
2553 stringy_cal = malloc(len + 1);
2554 safestrncpy(stringy_cal, ptr, len + 1);
2555 cal = icalcomponent_new_from_string(stringy_cal);
2562 ical_fixed_output_backend(cal, 0);
2564 /* Free the memory we obtained from libical's constructor */
2565 icalcomponent_free(cal);
2570 void serv_calendar_destroy(void)
2572 icaltimezone_free_builtin_timezones();
2576 * Register this module with the Citadel server.
2578 CTDL_MODULE_INIT(calendar)
2583 /* Tell libical to return errors instead of aborting if it gets bad data */
2584 icalerror_errors_are_fatal = 0;
2586 /* Use our own application prefix in tzid's generated from system tzdata */
2587 icaltimezone_set_tzid_prefix("/citadel.org/");
2589 /* Initialize our hook functions */
2590 CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
2591 CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
2592 CtdlRegisterSessionHook(ical_create_room, EVT_LOGIN);
2593 CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCal commands");
2594 CtdlRegisterSessionHook(ical_session_startup, EVT_START);
2595 CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP);
2596 CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
2597 CtdlRegisterFixedOutputHook("application/ics", ical_fixed_output);
2598 CtdlRegisterCleanupHook(serv_calendar_destroy);
2601 /* return our Subversion id for the Log */