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 at %s:%d - could not allocate component!\n",
60 /* Set the Product ID */
61 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
63 /* Set the Version Number */
64 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
71 * Utility function to encapsulate a subcomponent into a full VCALENDAR
73 icalcomponent *ical_encapsulate_subcomponent(icalcomponent *subcomp) {
74 icalcomponent *encaps;
76 /* If we're already looking at a full VCALENDAR component,
77 * don't bother ... just return itself.
79 if (icalcomponent_isa(subcomp) == ICAL_VCALENDAR_COMPONENT) {
83 /* Encapsulate the VEVENT component into a complete VCALENDAR */
84 encaps = icalcomponent_new_citadel_vcalendar();
85 if (encaps == NULL) return NULL;
87 /* Encapsulate the subcomponent inside */
88 icalcomponent_add_component(encaps, subcomp);
90 /* Convert all timestamps to UTC so we don't have to deal with
91 * stupid VTIMEZONE crap.
93 ical_dezonify(encaps);
95 /* Return the object we just created. */
103 * Write a calendar object into the specified user's calendar room.
104 * If the supplied user is NULL, this function writes the calendar object
105 * to the currently selected room.
107 void ical_write_to_cal(struct ctdluser *u, icalcomponent *cal) {
109 icalcomponent *encaps = NULL;
110 struct CtdlMessage *msg = NULL;
111 icalcomponent *tmp=NULL;
113 if (cal == NULL) return;
115 /* If the supplied object is a subcomponent, encapsulate it in
116 * a full VCALENDAR component, and save that instead.
118 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
119 tmp = icalcomponent_new_clone(cal);
120 encaps = ical_encapsulate_subcomponent(tmp);
121 ical_write_to_cal(u, encaps);
122 icalcomponent_free(tmp);
123 icalcomponent_free(encaps);
127 ser = icalcomponent_as_ical_string(cal);
128 if (ser == NULL) return;
130 /* If the caller supplied a user, write to that user's default calendar room */
132 /* This handy API function does all the work for us. */
133 CtdlWriteObject(USERCALENDARROOM, /* which room */
134 "text/calendar", /* MIME type */
136 strlen(ser)+1, /* length */
139 0, /* don't delete others of this type */
144 /* If the caller did not supply a user, write to the currently selected room */
146 msg = malloc(sizeof(struct CtdlMessage));
147 memset(msg, 0, sizeof(struct CtdlMessage));
148 msg->cm_magic = CTDLMESSAGE_MAGIC;
149 msg->cm_anon_type = MES_NORMAL;
150 msg->cm_format_type = 4;
151 msg->cm_fields['A'] = strdup(CC->user.fullname);
152 msg->cm_fields['O'] = strdup(CC->room.QRname);
153 msg->cm_fields['N'] = strdup(config.c_nodename);
154 msg->cm_fields['H'] = strdup(config.c_humannode);
155 msg->cm_fields['M'] = malloc(strlen(ser) + 40);
156 strcpy(msg->cm_fields['M'], "Content-type: text/calendar\r\n\r\n");
157 strcat(msg->cm_fields['M'], ser);
159 /* Now write the data */
160 CtdlSubmitMsg(msg, NULL, "", QP_EADDR);
161 CtdlFreeMessage(msg);
164 /* In either case, now we can free the serialized calendar object */
170 * Add a calendar object to the user's calendar
172 * ok because it uses ical_write_to_cal()
174 void ical_add(icalcomponent *cal, int recursion_level) {
178 * The VEVENT subcomponent is the one we're interested in saving.
180 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
182 ical_write_to_cal(&CC->user, cal);
186 /* If the component has subcomponents, recurse through them. */
187 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
189 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
190 /* Recursively process subcomponent */
191 ical_add(c, recursion_level+1);
199 * Send a reply to a meeting invitation.
201 * 'request' is the invitation to reply to.
202 * 'action' is the string "accept" or "decline" or "tentative".
205 void ical_send_a_reply(icalcomponent *request, char *action) {
206 icalcomponent *the_reply = NULL;
207 icalcomponent *vevent = NULL;
208 icalproperty *attendee = NULL;
209 char attendee_string[SIZ];
210 icalproperty *organizer = NULL;
211 char organizer_string[SIZ];
212 icalproperty *summary = NULL;
213 char summary_string[SIZ];
214 icalproperty *me_attend = NULL;
215 struct recptypes *recp = NULL;
216 icalparameter *partstat = NULL;
217 char *serialized_reply = NULL;
218 char *reply_message_text = NULL;
219 struct CtdlMessage *msg = NULL;
220 struct recptypes *valid = NULL;
222 strcpy(organizer_string, "");
223 strcpy(summary_string, "Calendar item");
225 if (request == NULL) {
226 CtdlLogPrintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
230 the_reply = icalcomponent_new_clone(request);
231 if (the_reply == NULL) {
232 CtdlLogPrintf(CTDL_ERR, "ERROR: cannot clone request\n");
236 /* Change the method from REQUEST to REPLY */
237 icalcomponent_set_method(the_reply, ICAL_METHOD_REPLY);
239 vevent = icalcomponent_get_first_component(the_reply, ICAL_VEVENT_COMPONENT);
240 if (vevent != NULL) {
241 /* Hunt for attendees, removing ones that aren't us.
242 * (Actually, remove them all, cloning our own one so we can
243 * re-insert it later)
245 while (attendee = icalcomponent_get_first_property(vevent,
246 ICAL_ATTENDEE_PROPERTY), (attendee != NULL)
248 if (icalproperty_get_attendee(attendee)) {
249 strcpy(attendee_string,
250 icalproperty_get_attendee(attendee) );
251 if (!strncasecmp(attendee_string, "MAILTO:", 7)) {
252 strcpy(attendee_string, &attendee_string[7]);
253 striplt(attendee_string);
254 recp = validate_recipients(attendee_string, NULL, 0);
256 if (!strcasecmp(recp->recp_local, CC->user.fullname)) {
257 if (me_attend) icalproperty_free(me_attend);
258 me_attend = icalproperty_new_clone(attendee);
260 free_recipients(recp);
265 icalcomponent_remove_property(vevent, attendee);
266 icalproperty_free(attendee);
269 /* We found our own address in the attendee list. */
271 /* Change the partstat from NEEDS-ACTION to ACCEPT or DECLINE */
272 icalproperty_remove_parameter(me_attend, ICAL_PARTSTAT_PARAMETER);
274 if (!strcasecmp(action, "accept")) {
275 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_ACCEPTED);
277 else if (!strcasecmp(action, "decline")) {
278 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_DECLINED);
280 else if (!strcasecmp(action, "tentative")) {
281 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE);
284 if (partstat) icalproperty_add_parameter(me_attend, partstat);
286 /* Now insert it back into the vevent. */
287 icalcomponent_add_property(vevent, me_attend);
290 /* Figure out who to send this thing to */
291 organizer = icalcomponent_get_first_property(vevent, ICAL_ORGANIZER_PROPERTY);
292 if (organizer != NULL) {
293 if (icalproperty_get_organizer(organizer)) {
294 strcpy(organizer_string,
295 icalproperty_get_organizer(organizer) );
298 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
299 strcpy(organizer_string, &organizer_string[7]);
300 striplt(organizer_string);
302 strcpy(organizer_string, "");
305 /* Extract the summary string -- we'll use it as the
306 * message subject for the reply
308 summary = icalcomponent_get_first_property(vevent, ICAL_SUMMARY_PROPERTY);
309 if (summary != NULL) {
310 if (icalproperty_get_summary(summary)) {
311 strcpy(summary_string,
312 icalproperty_get_summary(summary) );
317 /* Now generate the reply message and send it out. */
318 serialized_reply = strdup(icalcomponent_as_ical_string(the_reply));
319 icalcomponent_free(the_reply); /* don't need this anymore */
320 if (serialized_reply == NULL) return;
322 reply_message_text = malloc(strlen(serialized_reply) + SIZ);
323 if (reply_message_text != NULL) {
324 sprintf(reply_message_text,
325 "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
329 msg = CtdlMakeMessage(&CC->user,
330 organizer_string, /* to */
332 CC->room.QRname, 0, FMT_RFC822,
335 summary_string, /* Use summary for subject */
341 valid = validate_recipients(organizer_string, NULL, 0);
342 CtdlSubmitMsg(msg, valid, "", QP_EADDR);
343 CtdlFreeMessage(msg);
344 free_recipients(valid);
347 free(serialized_reply);
353 * Callback function for mime parser that hunts for calendar content types
354 * and turns them into calendar objects
356 void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
357 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
358 char *cbid, void *cbuserdata) {
360 struct ical_respond_data *ird = NULL;
362 ird = (struct ical_respond_data *) cbuserdata;
364 /* desired_partnum can be set to "_HUNT_" to have it just look for
365 * the first part with a content type of text/calendar. Otherwise
366 * we have to only process the right one.
368 if (strcasecmp(ird->desired_partnum, "_HUNT_")) {
369 if (strcasecmp(partnum, ird->desired_partnum)) {
374 if ( (strcasecmp(cbtype, "text/calendar"))
375 && (strcasecmp(cbtype, "application/ics")) ) {
379 if (ird->cal != NULL) {
380 icalcomponent_free(ird->cal);
384 ird->cal = icalcomponent_new_from_string(content);
385 if (ird->cal != NULL) {
386 ical_dezonify(ird->cal);
392 * Respond to a meeting request.
394 void ical_respond(long msgnum, char *partnum, char *action) {
395 struct CtdlMessage *msg = NULL;
396 struct ical_respond_data ird;
399 (strcasecmp(action, "accept"))
400 && (strcasecmp(action, "decline"))
402 cprintf("%d Action must be 'accept' or 'decline'\n",
403 ERROR + ILLEGAL_VALUE
408 msg = CtdlFetchMessage(msgnum, 1);
410 cprintf("%d Message %ld not found.\n",
411 ERROR + ILLEGAL_VALUE,
417 memset(&ird, 0, sizeof ird);
418 strcpy(ird.desired_partnum, partnum);
419 mime_parser(msg->cm_fields['M'],
421 *ical_locate_part, /* callback function */
423 (void *) &ird, /* user data */
427 /* We're done with the incoming message, because we now have a
428 * calendar object in memory.
430 CtdlFreeMessage(msg);
433 * Here is the real meat of this function. Handle the event.
435 if (ird.cal != NULL) {
436 /* Save this in the user's calendar if necessary */
437 if (!strcasecmp(action, "accept")) {
438 ical_add(ird.cal, 0);
441 /* Send a reply if necessary */
442 if (icalcomponent_get_method(ird.cal) == ICAL_METHOD_REQUEST) {
443 ical_send_a_reply(ird.cal, action);
446 /* Now that we've processed this message, we don't need it
447 * anymore. So delete it. (NOTE we don't do this anymore.)
448 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
451 /* Free the memory we allocated and return a response. */
452 icalcomponent_free(ird.cal);
454 cprintf("%d ok\n", CIT_OK);
458 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
462 /* should never get here */
467 * Figure out the UID of the calendar event being referred to in a
468 * REPLY object. This function is recursive.
470 void ical_learn_uid_of_reply(char *uidbuf, icalcomponent *cal) {
471 icalcomponent *subcomponent;
474 /* If this object is a REPLY, then extract the UID. */
475 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
476 p = icalcomponent_get_first_property(cal, ICAL_UID_PROPERTY);
478 strcpy(uidbuf, icalproperty_get_comment(p));
482 /* Otherwise, recurse through any VEVENT subcomponents. We do NOT want the
483 * UID of the reply; we want the UID of the invitation being replied to.
485 for (subcomponent = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
486 subcomponent != NULL;
487 subcomponent = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT) ) {
488 ical_learn_uid_of_reply(uidbuf, subcomponent);
494 * ical_update_my_calendar_with_reply() refers to this callback function; when we
495 * locate the message containing the calendar event we're replying to, this function
496 * gets called. It basically just sticks the message number in a supplied buffer.
498 void ical_hunt_for_event_to_update(long msgnum, void *data) {
501 msgnumptr = (long *) data;
506 struct original_event_container {
511 * Callback function for mime parser that hunts for calendar content types
512 * and turns them into calendar objects (called by ical_update_my_calendar_with_reply()
513 * to fetch the object being updated)
515 void ical_locate_original_event(char *name, char *filename, char *partnum, char *disp,
516 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
517 char *cbid, void *cbuserdata) {
519 struct original_event_container *oec = NULL;
521 if ( (strcasecmp(cbtype, "text/calendar"))
522 && (strcasecmp(cbtype, "application/ics")) ) {
525 oec = (struct original_event_container *) cbuserdata;
526 if (oec->c != NULL) {
527 icalcomponent_free(oec->c);
529 oec->c = icalcomponent_new_from_string(content);
534 * Merge updated attendee information from a REPLY into an existing event.
536 void ical_merge_attendee_reply(icalcomponent *event, icalcomponent *reply) {
538 icalproperty *e_attendee, *r_attendee;
540 /* First things first. If we're not looking at a VEVENT component,
541 * recurse through subcomponents until we find one.
543 if (icalcomponent_isa(event) != ICAL_VEVENT_COMPONENT) {
544 for (c = icalcomponent_get_first_component(event, ICAL_VEVENT_COMPONENT);
546 c = icalcomponent_get_next_component(event, ICAL_VEVENT_COMPONENT) ) {
547 ical_merge_attendee_reply(c, reply);
552 /* Now do the same thing with the reply.
554 if (icalcomponent_isa(reply) != ICAL_VEVENT_COMPONENT) {
555 for (c = icalcomponent_get_first_component(reply, ICAL_VEVENT_COMPONENT);
557 c = icalcomponent_get_next_component(reply, ICAL_VEVENT_COMPONENT) ) {
558 ical_merge_attendee_reply(event, c);
563 /* Clone the reply, because we're going to rip its guts out. */
564 reply = icalcomponent_new_clone(reply);
566 /* At this point we're looking at the correct subcomponents.
567 * Iterate through the attendees looking for a match.
570 for (e_attendee = icalcomponent_get_first_property(event, ICAL_ATTENDEE_PROPERTY);
572 e_attendee = icalcomponent_get_next_property(event, ICAL_ATTENDEE_PROPERTY)) {
574 for (r_attendee = icalcomponent_get_first_property(reply, ICAL_ATTENDEE_PROPERTY);
576 r_attendee = icalcomponent_get_next_property(reply, ICAL_ATTENDEE_PROPERTY)) {
578 /* Check to see if these two attendees match...
581 icalproperty_get_attendee(e_attendee),
582 icalproperty_get_attendee(r_attendee)
584 /* ...and if they do, remove the attendee from the event
585 * and replace it with the attendee from the reply. (The
586 * reply's copy will have the same address, but an updated
589 icalcomponent_remove_property(event, e_attendee);
590 icalproperty_free(e_attendee);
591 icalcomponent_remove_property(reply, r_attendee);
592 icalcomponent_add_property(event, r_attendee);
594 /* Since we diddled both sets of attendees, we have to start
595 * the iteration over again. This will not create an infinite
596 * loop because we removed the attendee from the reply. (That's
597 * why we cloned the reply, and that's what we mean by "ripping
606 /* Free the *clone* of the reply. */
607 icalcomponent_free(reply);
614 * Handle an incoming RSVP (object with method==ICAL_METHOD_REPLY) for a
615 * calendar event. The object has already been deserialized for us; all
616 * we have to do here is hunt for the event in our calendar, merge in the
617 * updated attendee status, and save it again.
619 * This function returns 0 on success, 1 if the event was not found in the
620 * user's calendar, or 2 if an internal error occurred.
622 int ical_update_my_calendar_with_reply(icalcomponent *cal) {
624 char hold_rm[ROOMNAMELEN];
625 long msgnum_being_replaced = 0;
626 struct CtdlMessage *msg = NULL;
627 struct original_event_container oec;
628 icalcomponent *original_event;
629 char *serialized_event = NULL;
630 char roomname[ROOMNAMELEN];
631 char *message_text = NULL;
633 /* Figure out just what event it is we're dealing with */
634 strcpy(uid, "--==<< InVaLiD uId >>==--");
635 ical_learn_uid_of_reply(uid, cal);
636 CtdlLogPrintf(CTDL_DEBUG, "UID of event being replied to is <%s>\n", uid);
638 strcpy(hold_rm, CC->room.QRname); /* save current room */
640 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
641 getroom(&CC->room, hold_rm);
642 CtdlLogPrintf(CTDL_CRIT, "cannot get user calendar room\n");
647 * Look in the EUID index for a message with
648 * the Citadel EUID set to the value we're looking for. Since
649 * Citadel always sets the message EUID to the iCalendar UID of
650 * the event, this will work.
652 msgnum_being_replaced = locate_message_by_euid(uid, &CC->room);
654 getroom(&CC->room, hold_rm); /* return to saved room */
656 CtdlLogPrintf(CTDL_DEBUG, "msgnum_being_replaced == %ld\n", msgnum_being_replaced);
657 if (msgnum_being_replaced == 0) {
658 return(1); /* no calendar event found */
661 /* Now we know the ID of the message containing the event being updated.
662 * We don't actually have to delete it; that'll get taken care of by the
663 * server when we save another event with the same UID. This just gives
664 * us the ability to load the event into memory so we can diddle the
667 msg = CtdlFetchMessage(msgnum_being_replaced, 1);
669 return(2); /* internal error */
672 mime_parser(msg->cm_fields['M'],
674 *ical_locate_original_event, /* callback function */
676 &oec, /* user data */
679 CtdlFreeMessage(msg);
681 original_event = oec.c;
682 if (original_event == NULL) {
683 CtdlLogPrintf(CTDL_ERR, "ERROR: Original_component is NULL.\n");
687 /* Merge the attendee's updated status into the event */
688 ical_merge_attendee_reply(original_event, cal);
691 serialized_event = strdup(icalcomponent_as_ical_string(original_event));
692 icalcomponent_free(original_event); /* Don't need this anymore. */
693 if (serialized_event == NULL) return(2);
695 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
697 message_text = malloc(strlen(serialized_event) + SIZ);
698 if (message_text != NULL) {
699 sprintf(message_text,
700 "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
704 msg = CtdlMakeMessage(&CC->user,
705 "", /* No recipient */
706 "", /* No recipient */
717 CIT_ICAL->avoid_sending_invitations = 1;
718 CtdlSubmitMsg(msg, NULL, roomname, QP_EADDR);
719 CtdlFreeMessage(msg);
720 CIT_ICAL->avoid_sending_invitations = 0;
723 free(serialized_event);
729 * Handle an incoming RSVP for an event. (This is the server subcommand part; it
730 * simply extracts the calendar object from the message, deserializes it, and
731 * passes it up to ical_update_my_calendar_with_reply() for processing.
733 void ical_handle_rsvp(long msgnum, char *partnum, char *action) {
734 struct CtdlMessage *msg = NULL;
735 struct ical_respond_data ird;
739 (strcasecmp(action, "update"))
740 && (strcasecmp(action, "ignore"))
742 cprintf("%d Action must be 'update' or 'ignore'\n",
743 ERROR + ILLEGAL_VALUE
748 msg = CtdlFetchMessage(msgnum, 1);
750 cprintf("%d Message %ld not found.\n",
751 ERROR + ILLEGAL_VALUE,
757 memset(&ird, 0, sizeof ird);
758 strcpy(ird.desired_partnum, partnum);
759 mime_parser(msg->cm_fields['M'],
761 *ical_locate_part, /* callback function */
763 (void *) &ird, /* user data */
767 /* We're done with the incoming message, because we now have a
768 * calendar object in memory.
770 CtdlFreeMessage(msg);
773 * Here is the real meat of this function. Handle the event.
775 if (ird.cal != NULL) {
776 /* Update the user's calendar if necessary */
777 if (!strcasecmp(action, "update")) {
778 ret = ical_update_my_calendar_with_reply(ird.cal);
780 cprintf("%d Your calendar has been updated with this reply.\n",
784 cprintf("%d This event does not exist in your calendar.\n",
785 ERROR + FILE_NOT_FOUND);
788 cprintf("%d An internal error occurred.\n",
789 ERROR + INTERNAL_ERROR);
793 cprintf("%d This reply has been ignored.\n", CIT_OK);
796 /* Now that we've processed this message, we don't need it
797 * anymore. So delete it. (Don't do this anymore.)
798 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
801 /* Free the memory we allocated and return a response. */
802 icalcomponent_free(ird.cal);
807 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
811 /* should never get here */
816 * Search for a property in both the top level and in a VEVENT subcomponent
818 icalproperty *ical_ctdl_get_subprop(
820 icalproperty_kind which_prop
825 p = icalcomponent_get_first_property(cal, which_prop);
827 c = icalcomponent_get_first_component(cal,
828 ICAL_VEVENT_COMPONENT);
830 p = icalcomponent_get_first_property(c, which_prop);
838 * Check to see if two events overlap. Returns nonzero if they do.
839 * (This function is used in both Citadel and WebCit. If you change it in
840 * one place, change it in the other. Better yet, put it in a library.)
842 int ical_ctdl_is_overlap(
843 struct icaltimetype t1start,
844 struct icaltimetype t1end,
845 struct icaltimetype t2start,
846 struct icaltimetype t2end
849 if (icaltime_is_null_time(t1start)) return(0);
850 if (icaltime_is_null_time(t2start)) return(0);
852 /* First, check for all-day events */
853 if (t1start.is_date) {
854 if (!icaltime_compare_date_only(t1start, t2start)) {
857 if (!icaltime_is_null_time(t2end)) {
858 if (!icaltime_compare_date_only(t1start, t2end)) {
864 if (t2start.is_date) {
865 if (!icaltime_compare_date_only(t2start, t1start)) {
868 if (!icaltime_is_null_time(t1end)) {
869 if (!icaltime_compare_date_only(t2start, t1end)) {
875 /* Now check for overlaps using date *and* time. */
877 /* First, bail out if either event 1 or event 2 is missing end time. */
878 if (icaltime_is_null_time(t1end)) return(0);
879 if (icaltime_is_null_time(t2end)) return(0);
881 /* If event 1 ends before event 2 starts, we're in the clear. */
882 if (icaltime_compare(t1end, t2start) <= 0) return(0);
884 /* If event 2 ends before event 1 starts, we're also ok. */
885 if (icaltime_compare(t2end, t1start) <= 0) return(0);
887 /* Otherwise, they overlap. */
894 * Phase 6 of "hunt for conflicts"
895 * called by ical_conflicts_phase5()
897 * Now both the proposed and existing events have been boiled down to start and end times.
898 * Check for overlap and output any conflicts.
900 void ical_conflicts_phase6(struct icaltimetype t1start,
901 struct icaltimetype t1end,
902 struct icaltimetype t2start,
903 struct icaltimetype t2end,
904 long existing_msgnum,
905 char *conflict_event_uid,
906 char *conflict_event_summary,
910 /* debugging cruft */
912 // tt = icaltime_as_timet(t1start);
913 // CtdlLogPrintf(CTDL_DEBUG, "PROPOSED START: %s", ctime(&tt));
914 // tt = icaltime_as_timet(t1end);
915 // CtdlLogPrintf(CTDL_DEBUG, " PROPOSED END: %s", ctime(&tt));
916 // tt = icaltime_as_timet(t2start);
917 // CtdlLogPrintf(CTDL_DEBUG, "EXISTING START: %s", ctime(&tt));
918 // tt = icaltime_as_timet(t2end);
919 // CtdlLogPrintf(CTDL_DEBUG, " EXISTING END: %s", ctime(&tt));
921 /* compare and output */
923 if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
924 cprintf("%ld||%s|%s|%d|\n",
927 conflict_event_summary,
928 ( ((strlen(compare_uid)>0)
929 &&(!strcasecmp(compare_uid,
930 conflict_event_uid))) ? 1 : 0
940 * Phase 5 of "hunt for conflicts"
941 * Called by ical_conflicts_phase4()
943 * We have the proposed event boiled down to start and end times.
944 * Now check it against an existing event.
946 void ical_conflicts_phase5(struct icaltimetype t1start,
947 struct icaltimetype t1end,
948 icalcomponent *existing_event,
949 long existing_msgnum,
952 char conflict_event_uid[SIZ];
953 char conflict_event_summary[SIZ];
954 struct icaltimetype t2start, t2end;
957 /* recur variables */
958 icalproperty *rrule = NULL;
959 struct icalrecurrencetype recur;
960 icalrecur_iterator *ritr = NULL;
961 struct icaldurationtype dur;
965 strcpy(conflict_event_uid, "");
966 strcpy(conflict_event_summary, "");
967 t2start = icaltime_null_time();
968 t2end = icaltime_null_time();
970 /* existing event stuff */
971 p = ical_ctdl_get_subprop(existing_event, ICAL_DTSTART_PROPERTY);
972 if (p == NULL) return;
973 if (p != NULL) t2start = icalproperty_get_dtstart(p);
975 p = ical_ctdl_get_subprop(existing_event, ICAL_DTEND_PROPERTY);
977 t2end = icalproperty_get_dtend(p);
978 dur = icaltime_subtract(t2end, t2start);
981 rrule = ical_ctdl_get_subprop(existing_event, ICAL_RRULE_PROPERTY);
983 recur = icalproperty_get_rrule(rrule);
984 ritr = icalrecur_iterator_new(recur, t2start);
985 CtdlLogPrintf(CTDL_DEBUG, "Recurrence found: %s\n", icalrecurrencetype_as_string(&recur));
989 p = ical_ctdl_get_subprop(existing_event, ICAL_UID_PROPERTY);
991 strcpy(conflict_event_uid, icalproperty_get_comment(p));
994 p = ical_ctdl_get_subprop(existing_event, ICAL_SUMMARY_PROPERTY);
996 strcpy(conflict_event_summary, icalproperty_get_comment(p));
999 ical_conflicts_phase6(t1start, t1end, t2start, t2end,
1000 existing_msgnum, conflict_event_uid, conflict_event_summary, compare_uid
1004 t2start = icalrecur_iterator_next(ritr);
1005 if (!icaltime_is_null_time(t2end)) {
1006 t2end = icaltime_add(t2start, dur);
1011 } while ( (rrule) && (!icaltime_is_null_time(t2start)) && (num_recur < MAX_RECUR) );
1012 if (num_recur > 0) CtdlLogPrintf(CTDL_DEBUG, "Iterated over existing event %d times.\n", num_recur);
1019 * Phase 4 of "hunt for conflicts"
1020 * Called by ical_hunt_for_conflicts_backend()
1022 * At this point we've got it boiled down to two icalcomponent events in memory.
1023 * If they conflict, output something to the client.
1025 void ical_conflicts_phase4(icalcomponent *proposed_event,
1026 icalcomponent *existing_event,
1027 long existing_msgnum)
1029 struct icaltimetype t1start, t1end;
1030 t1start = icaltime_null_time();
1031 t1end = icaltime_null_time();
1033 char compare_uid[SIZ];
1035 /* recur variables */
1036 icalproperty *rrule = NULL;
1037 struct icalrecurrencetype recur;
1038 icalrecur_iterator *ritr = NULL;
1039 struct icaldurationtype dur;
1042 /* initialization */
1043 strcpy(compare_uid, "");
1045 /* proposed event stuff */
1047 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTSTART_PROPERTY);
1048 if (p == NULL) return;
1049 if (p != NULL) t1start = icalproperty_get_dtstart(p);
1051 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTEND_PROPERTY);
1053 t1end = icalproperty_get_dtend(p);
1054 dur = icaltime_subtract(t1end, t1start);
1057 rrule = ical_ctdl_get_subprop(proposed_event, ICAL_RRULE_PROPERTY);
1059 recur = icalproperty_get_rrule(rrule);
1060 ritr = icalrecur_iterator_new(recur, t1start);
1061 CtdlLogPrintf(CTDL_DEBUG, "Recurrence found: %s\n", icalrecurrencetype_as_string(&recur));
1064 p = ical_ctdl_get_subprop(proposed_event, ICAL_UID_PROPERTY);
1066 strcpy(compare_uid, icalproperty_get_comment(p));
1070 ical_conflicts_phase5(t1start, t1end, existing_event, existing_msgnum, compare_uid);
1073 t1start = icalrecur_iterator_next(ritr);
1074 if (!icaltime_is_null_time(t1end)) {
1075 t1end = icaltime_add(t1start, dur);
1080 } while ( (rrule) && (!icaltime_is_null_time(t1start)) && (num_recur < MAX_RECUR) );
1081 if (num_recur > 0) CtdlLogPrintf(CTDL_DEBUG, "Iterated over proposed event %d times.\n", num_recur);
1087 * Phase 3 of "hunt for conflicts"
1088 * Called by ical_hunt_for_conflicts()
1090 void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
1091 icalcomponent *proposed_event;
1092 struct CtdlMessage *msg = NULL;
1093 struct ical_respond_data ird;
1095 proposed_event = (icalcomponent *)data;
1097 msg = CtdlFetchMessage(msgnum, 1);
1098 if (msg == NULL) return;
1099 memset(&ird, 0, sizeof ird);
1100 strcpy(ird.desired_partnum, "_HUNT_");
1101 mime_parser(msg->cm_fields['M'],
1103 *ical_locate_part, /* callback function */
1105 (void *) &ird, /* user data */
1108 CtdlFreeMessage(msg);
1110 if (ird.cal == NULL) return;
1112 ical_conflicts_phase4(proposed_event, ird.cal, msgnum);
1113 icalcomponent_free(ird.cal);
1119 * Phase 2 of "hunt for conflicts" operation.
1120 * At this point we have a calendar object which represents the VEVENT that
1121 * is proposed for addition to the calendar. Now hunt through the user's
1122 * calendar room, and output zero or more existing VEVENTs which conflict
1125 void ical_hunt_for_conflicts(icalcomponent *cal) {
1126 char hold_rm[ROOMNAMELEN];
1128 strcpy(hold_rm, CC->room.QRname); /* save current room */
1130 if (getroom(&CC->room, USERCALENDARROOM) != 0) {
1131 getroom(&CC->room, hold_rm);
1132 cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
1136 cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
1138 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1141 ical_hunt_for_conflicts_backend,
1146 getroom(&CC->room, hold_rm); /* return to saved room */
1153 * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
1155 void ical_conflicts(long msgnum, char *partnum) {
1156 struct CtdlMessage *msg = NULL;
1157 struct ical_respond_data ird;
1159 msg = CtdlFetchMessage(msgnum, 1);
1161 cprintf("%d Message %ld not found.\n",
1162 ERROR + ILLEGAL_VALUE,
1168 memset(&ird, 0, sizeof ird);
1169 strcpy(ird.desired_partnum, partnum);
1170 mime_parser(msg->cm_fields['M'],
1172 *ical_locate_part, /* callback function */
1174 (void *) &ird, /* user data */
1178 CtdlFreeMessage(msg);
1180 if (ird.cal != NULL) {
1181 ical_hunt_for_conflicts(ird.cal);
1182 icalcomponent_free(ird.cal);
1186 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
1190 /* should never get here */
1196 * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
1198 void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *cal) {
1201 struct icalperiodtype my_period;
1203 if (cal == NULL) return;
1204 my_period = icalperiodtype_null_period();
1206 if (icalcomponent_isa(cal) != ICAL_VEVENT_COMPONENT) {
1207 ical_add_to_freebusy(fb,
1208 icalcomponent_get_first_component(
1209 cal, ICAL_VEVENT_COMPONENT
1217 /* If this event is not opaque, the user isn't publishing it as
1218 * busy time, so don't bother doing anything else.
1220 p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
1222 v = icalproperty_get_value(p);
1224 if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
1230 /* Convert the DTSTART and DTEND properties to an icalperiod. */
1231 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
1233 my_period.start = icalproperty_get_dtstart(p);
1236 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
1238 my_period.end = icalproperty_get_dtstart(p);
1242 icalcomponent_add_property(fb,
1243 icalproperty_new_freebusy(my_period)
1246 /* Make sure the DTSTART property of the freebusy *list* is set to
1247 * the DTSTART property of the *earliest event*.
1249 p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
1251 icalcomponent_set_dtstart(fb,
1252 icalcomponent_get_dtstart(cal) );
1255 if (icaltime_compare(
1256 icalcomponent_get_dtstart(cal),
1257 icalcomponent_get_dtstart(fb)
1259 icalcomponent_set_dtstart(fb,
1260 icalcomponent_get_dtstart(cal) );
1264 /* Make sure the DTEND property of the freebusy *list* is set to
1265 * the DTEND property of the *latest event*.
1267 p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
1269 icalcomponent_set_dtend(fb,
1270 icalcomponent_get_dtend(cal) );
1273 if (icaltime_compare(
1274 icalcomponent_get_dtend(cal),
1275 icalcomponent_get_dtend(fb)
1277 icalcomponent_set_dtend(fb,
1278 icalcomponent_get_dtend(cal) );
1287 * Backend for ical_freebusy()
1289 * This function simply loads the messages in the user's calendar room,
1290 * which contain VEVENTs, then strips them of all non-freebusy data, and
1291 * adds them to the supplied VCALENDAR.
1294 void ical_freebusy_backend(long msgnum, void *data) {
1296 struct CtdlMessage *msg = NULL;
1297 struct ical_respond_data ird;
1299 cal = (icalcomponent *)data;
1301 msg = CtdlFetchMessage(msgnum, 1);
1302 if (msg == NULL) return;
1303 memset(&ird, 0, sizeof ird);
1304 strcpy(ird.desired_partnum, "_HUNT_");
1305 mime_parser(msg->cm_fields['M'],
1307 *ical_locate_part, /* callback function */
1309 (void *) &ird, /* user data */
1312 CtdlFreeMessage(msg);
1314 if (ird.cal == NULL) return;
1316 ical_add_to_freebusy(cal, ird.cal);
1318 /* Now free the memory. */
1319 icalcomponent_free(ird.cal);
1325 * Grab another user's free/busy times
1327 void ical_freebusy(char *who) {
1328 struct ctdluser usbuf;
1329 char calendar_room_name[ROOMNAMELEN];
1330 char hold_rm[ROOMNAMELEN];
1331 char *serialized_request = NULL;
1332 icalcomponent *encaps = NULL;
1333 icalcomponent *fb = NULL;
1334 int found_user = (-1);
1335 struct recptypes *recp = NULL;
1340 int config_lines = 0;
1342 /* First try an exact match. */
1343 found_user = getuser(&usbuf, who);
1345 /* If not found, try it as an unqualified email address. */
1346 if (found_user != 0) {
1348 recp = validate_recipients(buf, NULL, 0);
1349 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1351 if (recp->num_local == 1) {
1352 found_user = getuser(&usbuf, recp->recp_local);
1354 free_recipients(recp);
1358 /* If still not found, try it as an address qualified with the
1359 * primary FQDN of this Citadel node.
1361 if (found_user != 0) {
1362 snprintf(buf, sizeof buf, "%s@%s", who, config.c_fqdn);
1363 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1364 recp = validate_recipients(buf, NULL, 0);
1366 if (recp->num_local == 1) {
1367 found_user = getuser(&usbuf, recp->recp_local);
1369 free_recipients(recp);
1373 /* Still not found? Try qualifying it with every domain we
1374 * might have addresses in.
1376 if (found_user != 0) {
1377 config_lines = num_tokens(inetcfg, '\n');
1378 for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
1379 extract_token(buf, inetcfg, i, '\n', sizeof buf);
1380 extract_token(host, buf, 0, '|', sizeof host);
1381 extract_token(type, buf, 1, '|', sizeof type);
1383 if ( (!strcasecmp(type, "localhost"))
1384 || (!strcasecmp(type, "directory")) ) {
1385 snprintf(buf, sizeof buf, "%s@%s", who, host);
1386 CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", buf);
1387 recp = validate_recipients(buf, NULL, 0);
1389 if (recp->num_local == 1) {
1390 found_user = getuser(&usbuf, recp->recp_local);
1392 free_recipients(recp);
1398 if (found_user != 0) {
1399 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
1403 MailboxName(calendar_room_name, sizeof calendar_room_name,
1404 &usbuf, USERCALENDARROOM);
1406 strcpy(hold_rm, CC->room.QRname); /* save current room */
1408 if (getroom(&CC->room, calendar_room_name) != 0) {
1409 cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
1410 getroom(&CC->room, hold_rm);
1414 /* Create a VFREEBUSY subcomponent */
1415 CtdlLogPrintf(CTDL_DEBUG, "Creating VFREEBUSY component\n");
1416 fb = icalcomponent_new_vfreebusy();
1418 cprintf("%d Internal error: cannot allocate memory.\n",
1419 ERROR + INTERNAL_ERROR);
1420 getroom(&CC->room, hold_rm);
1424 /* Set the method to PUBLISH */
1425 icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
1427 /* Set the DTSTAMP to right now. */
1428 icalcomponent_set_dtstamp(fb, icaltime_from_timet(time(NULL), 0));
1430 /* Add the user's email address as ORGANIZER */
1431 sprintf(buf, "MAILTO:%s", who);
1432 if (strchr(buf, '@') == NULL) {
1434 strcat(buf, config.c_fqdn);
1436 for (i=0; buf[i]; ++i) {
1437 if (buf[i]==' ') buf[i] = '_';
1439 icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
1441 /* Add busy time from events */
1442 CtdlLogPrintf(CTDL_DEBUG, "Adding busy time from events\n");
1443 CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
1445 /* If values for DTSTART and DTEND are still not present, set them
1446 * to yesterday and tomorrow as default values.
1448 if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
1449 icalcomponent_set_dtstart(fb, icaltime_from_timet(time(NULL)-86400L, 0));
1451 if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
1452 icalcomponent_set_dtend(fb, icaltime_from_timet(time(NULL)+86400L, 0));
1455 /* Put the freebusy component into the calendar component */
1456 CtdlLogPrintf(CTDL_DEBUG, "Encapsulating\n");
1457 encaps = ical_encapsulate_subcomponent(fb);
1458 if (encaps == NULL) {
1459 icalcomponent_free(fb);
1460 cprintf("%d Internal error: cannot allocate memory.\n",
1461 ERROR + INTERNAL_ERROR);
1462 getroom(&CC->room, hold_rm);
1466 /* Set the method to PUBLISH */
1467 CtdlLogPrintf(CTDL_DEBUG, "Setting method\n");
1468 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1471 CtdlLogPrintf(CTDL_DEBUG, "Serializing\n");
1472 serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1473 icalcomponent_free(encaps); /* Don't need this anymore. */
1475 cprintf("%d Here is the free/busy data:\n", LISTING_FOLLOWS);
1476 if (serialized_request != NULL) {
1477 client_write(serialized_request, strlen(serialized_request));
1478 free(serialized_request);
1482 /* Go back to the room from which we came... */
1483 getroom(&CC->room, hold_rm);
1489 * Backend for ical_getics()
1491 * This is a ForEachMessage() callback function that searches the current room
1492 * for calendar events and adds them each into one big calendar component.
1494 void ical_getics_backend(long msgnum, void *data) {
1495 icalcomponent *encaps, *c;
1496 struct CtdlMessage *msg = NULL;
1497 struct ical_respond_data ird;
1499 encaps = (icalcomponent *)data;
1500 if (encaps == NULL) return;
1502 /* Look for the calendar event... */
1504 msg = CtdlFetchMessage(msgnum, 1);
1505 if (msg == NULL) return;
1506 memset(&ird, 0, sizeof ird);
1507 strcpy(ird.desired_partnum, "_HUNT_");
1508 mime_parser(msg->cm_fields['M'],
1510 *ical_locate_part, /* callback function */
1512 (void *) &ird, /* user data */
1515 CtdlFreeMessage(msg);
1517 if (ird.cal == NULL) return;
1519 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1520 * are responsible for "the_request"'s memory -- it will be freed
1521 * when we free "encaps".
1524 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1525 * in. This will almost never happen.
1527 if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
1528 icalcomponent_add_component(encaps, ird.cal);
1531 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1532 * and other components encapsulated inside, we have to extract them.
1535 for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
1537 c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
1538 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1540 icalcomponent_free(ird.cal);
1547 * Retrieve all of the calendar items in the current room, and output them
1548 * as a single icalendar object.
1550 void ical_getics(void)
1552 icalcomponent *encaps = NULL;
1555 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1556 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1557 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1558 return; /* Not an iCalendar-centric room */
1561 encaps = icalcomponent_new_vcalendar();
1562 if (encaps == NULL) {
1563 CtdlLogPrintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1564 __FILE__, __LINE__);
1565 cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
1569 cprintf("%d one big calendar\n", LISTING_FOLLOWS);
1571 /* Set the Product ID */
1572 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1574 /* Set the Version Number */
1575 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1577 /* Set the method to PUBLISH */
1578 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1580 /* Now go through the room encapsulating all calendar items. */
1581 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1584 ical_getics_backend,
1588 ser = strdup(icalcomponent_as_ical_string(encaps));
1589 client_write(ser, strlen(ser));
1592 icalcomponent_free(encaps); /* Don't need this anymore. */
1598 * Delete all of the calendar items in the current room, and replace them
1599 * with calendar items from a client-supplied data stream.
1601 void ical_putics(void)
1603 char *calstream = NULL;
1607 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1608 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1609 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1610 return; /* Not an iCalendar-centric room */
1613 if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
1614 cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
1618 cprintf("%d Transmit data now\n", SEND_LISTING);
1619 calstream = CtdlReadMessageBody("000", config.c_maxmsglen, NULL, 0, 0);
1620 if (calstream == NULL) {
1624 cal = icalcomponent_new_from_string(calstream);
1628 /* We got our data stream -- now do something with it. */
1630 /* Delete the existing messages in the room, because we are replacing
1631 * the entire calendar with an entire new (or updated) calendar.
1632 * (Careful: this opens an S_ROOMS critical section!)
1634 CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
1636 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1637 * in. This will almost never happen.
1639 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
1640 ical_write_to_cal(NULL, cal);
1643 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1644 * and other components encapsulated inside, we have to extract them.
1647 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1649 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1650 ical_write_to_cal(NULL, c);
1654 icalcomponent_free(cal);
1659 * All Citadel calendar commands from the client come through here.
1661 void cmd_ical(char *argbuf)
1669 extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
1671 /* Allow "test" and "freebusy" subcommands without logging in. */
1673 if (!strcasecmp(subcmd, "test")) {
1674 cprintf("%d This server supports calendaring\n", CIT_OK);
1678 if (!strcasecmp(subcmd, "freebusy")) {
1679 extract_token(who, argbuf, 1, '|', sizeof who);
1684 if (!strcasecmp(subcmd, "sgi")) {
1685 CIT_ICAL->server_generated_invitations =
1686 (extract_int(argbuf, 1) ? 1 : 0) ;
1688 CIT_OK, CIT_ICAL->server_generated_invitations);
1692 if (CtdlAccessCheck(ac_logged_in)) return;
1694 if (!strcasecmp(subcmd, "respond")) {
1695 msgnum = extract_long(argbuf, 1);
1696 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1697 extract_token(action, argbuf, 3, '|', sizeof action);
1698 ical_respond(msgnum, partnum, action);
1702 if (!strcasecmp(subcmd, "handle_rsvp")) {
1703 msgnum = extract_long(argbuf, 1);
1704 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1705 extract_token(action, argbuf, 3, '|', sizeof action);
1706 ical_handle_rsvp(msgnum, partnum, action);
1710 if (!strcasecmp(subcmd, "conflicts")) {
1711 msgnum = extract_long(argbuf, 1);
1712 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1713 ical_conflicts(msgnum, partnum);
1717 if (!strcasecmp(subcmd, "getics")) {
1722 if (!strcasecmp(subcmd, "putics")) {
1727 cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
1733 * We don't know if the calendar room exists so we just create it at login
1735 void ical_create_room(void)
1740 /* Create the calendar room if it doesn't already exist */
1741 create_room(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
1743 /* Set expiration policy to manual; otherwise objects will be lost! */
1744 if (lgetroom(&qr, USERCALENDARROOM)) {
1745 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1748 qr.QRep.expire_mode = EXPIRE_MANUAL;
1749 qr.QRdefaultview = VIEW_CALENDAR; /* 3 = calendar view */
1752 /* Set the view to a calendar view */
1753 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1754 vbuf.v_view = VIEW_CALENDAR;
1755 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1757 /* Create the tasks list room if it doesn't already exist */
1758 create_room(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
1760 /* Set expiration policy to manual; otherwise objects will be lost! */
1761 if (lgetroom(&qr, USERTASKSROOM)) {
1762 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1765 qr.QRep.expire_mode = EXPIRE_MANUAL;
1766 qr.QRdefaultview = VIEW_TASKS;
1769 /* Set the view to a task list view */
1770 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1771 vbuf.v_view = VIEW_TASKS;
1772 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1774 /* Create the notes room if it doesn't already exist */
1775 create_room(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
1777 /* Set expiration policy to manual; otherwise objects will be lost! */
1778 if (lgetroom(&qr, USERNOTESROOM)) {
1779 CtdlLogPrintf(CTDL_CRIT, "Couldn't get the user calendar room!\n");
1782 qr.QRep.expire_mode = EXPIRE_MANUAL;
1783 qr.QRdefaultview = VIEW_NOTES;
1786 /* Set the view to a notes view */
1787 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1788 vbuf.v_view = VIEW_NOTES;
1789 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1796 * ical_send_out_invitations() is called by ical_saving_vevent() when it
1799 void ical_send_out_invitations(icalcomponent *cal) {
1800 icalcomponent *the_request = NULL;
1801 char *serialized_request = NULL;
1802 icalcomponent *encaps = NULL;
1803 char *request_message_text = NULL;
1804 struct CtdlMessage *msg = NULL;
1805 struct recptypes *valid = NULL;
1806 char attendees_string[SIZ];
1807 int num_attendees = 0;
1808 char this_attendee[256];
1809 icalproperty *attendee = NULL;
1810 char summary_string[SIZ];
1811 icalproperty *summary = NULL;
1815 CtdlLogPrintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
1820 /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
1821 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
1822 ical_send_out_invitations(
1823 icalcomponent_get_first_component(
1824 cal, ICAL_VEVENT_COMPONENT
1830 /* Clone the event */
1831 the_request = icalcomponent_new_clone(cal);
1832 if (the_request == NULL) {
1833 CtdlLogPrintf(CTDL_ERR, "ERROR: cannot clone calendar object\n");
1837 /* Extract the summary string -- we'll use it as the
1838 * message subject for the request
1840 strcpy(summary_string, "Meeting request");
1841 summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
1842 if (summary != NULL) {
1843 if (icalproperty_get_summary(summary)) {
1844 strcpy(summary_string,
1845 icalproperty_get_summary(summary) );
1849 /* Determine who the recipients of this message are (the attendees) */
1850 strcpy(attendees_string, "");
1851 for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
1852 if (icalproperty_get_attendee(attendee)) {
1853 safestrncpy(this_attendee, icalproperty_get_attendee(attendee), sizeof this_attendee);
1854 if (!strncasecmp(this_attendee, "MAILTO:", 7)) {
1855 strcpy(this_attendee, &this_attendee[7]);
1857 if (!CtdlIsMe(this_attendee, sizeof this_attendee)) { /* don't send an invitation to myself! */
1858 snprintf(&attendees_string[strlen(attendees_string)],
1859 sizeof(attendees_string) - strlen(attendees_string),
1869 CtdlLogPrintf(CTDL_DEBUG, "<%d> attendees: <%s>\n", num_attendees, attendees_string);
1871 /* If there are no attendees, there are no invitations to send, so...
1872 * don't bother putting one together! Punch out, Maverick!
1874 if (num_attendees == 0) {
1875 icalcomponent_free(the_request);
1879 /* Encapsulate the VEVENT component into a complete VCALENDAR */
1880 encaps = icalcomponent_new_vcalendar();
1881 if (encaps == NULL) {
1882 CtdlLogPrintf(CTDL_DEBUG, "Error at %s:%d - could not allocate component!\n",
1883 __FILE__, __LINE__);
1884 icalcomponent_free(the_request);
1888 /* Set the Product ID */
1889 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1891 /* Set the Version Number */
1892 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1894 /* Set the method to REQUEST */
1895 icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
1897 /* Now make sure all of the DTSTART and DTEND properties are UTC. */
1898 ical_dezonify(the_request);
1900 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1901 * are responsible for "the_request"'s memory -- it will be freed
1902 * when we free "encaps".
1904 icalcomponent_add_component(encaps, the_request);
1907 serialized_request = strdup(icalcomponent_as_ical_string(encaps));
1908 icalcomponent_free(encaps); /* Don't need this anymore. */
1909 if (serialized_request == NULL) return;
1911 reqsize = strlen(serialized_request) + SIZ;
1912 request_message_text = malloc(reqsize);
1913 if (request_message_text != NULL) {
1914 snprintf(request_message_text, reqsize,
1915 "Content-type: text/calendar\r\n\r\n%s\r\n",
1919 msg = CtdlMakeMessage(&CC->user,
1920 "", /* No single recipient here */
1921 "", /* No single recipient here */
1922 CC->room.QRname, 0, FMT_RFC822,
1925 summary_string, /* Use summary for subject */
1927 request_message_text,
1931 valid = validate_recipients(attendees_string, NULL, 0);
1932 CtdlSubmitMsg(msg, valid, "", QP_EADDR);
1933 CtdlFreeMessage(msg);
1934 free_recipients(valid);
1937 free(serialized_request);
1942 * When a calendar object is being saved, determine whether it's a VEVENT
1943 * and the user saving it is the organizer. If so, send out invitations
1944 * to any listed attendees.
1947 void ical_saving_vevent(icalcomponent *cal) {
1949 icalproperty *organizer = NULL;
1950 char organizer_string[SIZ];
1952 CtdlLogPrintf(CTDL_DEBUG, "ical_saving_vevent() has been called!\n");
1954 /* Don't send out invitations unless the client wants us to. */
1955 if (CIT_ICAL->server_generated_invitations == 0) {
1959 /* Don't send out invitations if we've been asked not to. */
1960 if (CIT_ICAL->avoid_sending_invitations > 0) {
1964 strcpy(organizer_string, "");
1966 * The VEVENT subcomponent is the one we're interested in.
1967 * Send out invitations if, and only if, this user is the Organizer.
1969 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
1970 organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
1971 if (organizer != NULL) {
1972 if (icalproperty_get_organizer(organizer)) {
1973 strcpy(organizer_string,
1974 icalproperty_get_organizer(organizer));
1977 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
1978 strcpy(organizer_string, &organizer_string[7]);
1979 striplt(organizer_string);
1981 * If the user saving the event is listed as the
1982 * organizer, then send out invitations.
1984 if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
1985 ical_send_out_invitations(cal);
1990 /* If the component has subcomponents, recurse through them. */
1991 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1993 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1994 /* Recursively process subcomponent */
1995 ical_saving_vevent(c);
2003 * Back end for ical_obj_beforesave()
2004 * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
2005 * the summary of the event (becomes message subject),
2006 * and the start time (becomes message date/time).
2008 void ical_obj_beforesave_backend(char *name, char *filename, char *partnum,
2009 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2010 char *encoding, char *cbid, void *cbuserdata)
2012 icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
2014 char new_uid[256] = "";
2015 char buf[1024] = "";
2016 struct CtdlMessage *msg = (struct CtdlMessage *) cbuserdata;
2020 /* We're only interested in calendar data. */
2021 if ( (strcasecmp(cbtype, "text/calendar"))
2022 && (strcasecmp(cbtype, "application/ics")) ) {
2026 /* Hunt for the UID and drop it in
2027 * the "user data" pointer for the MIME parser. When
2028 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2031 whole_cal = icalcomponent_new_from_string(content);
2034 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
2035 nested_event = icalcomponent_get_first_component(
2036 cal, ICAL_VEVENT_COMPONENT);
2037 if (nested_event != NULL) {
2041 nested_todo = icalcomponent_get_first_component(
2042 cal, ICAL_VTODO_COMPONENT);
2043 if (nested_todo != NULL) {
2051 /* Set the message EUID to the iCalendar UID */
2053 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2055 /* If there's no uid we must generate one */
2056 generate_uuid(new_uid);
2057 icalcomponent_add_property(cal, icalproperty_new_uid(new_uid));
2058 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2061 safestrncpy(buf, icalproperty_get_comment(p), sizeof buf);
2062 if (!IsEmptyStr(buf)) {
2063 if (msg->cm_fields['E'] != NULL) {
2064 free(msg->cm_fields['E']);
2066 msg->cm_fields['E'] = strdup(buf);
2067 CtdlLogPrintf(CTDL_DEBUG, "Saving calendar UID <%s>\n", buf);
2071 /* Set the message subject to the iCalendar summary */
2073 p = ical_ctdl_get_subprop(cal, ICAL_SUMMARY_PROPERTY);
2075 safestrncpy(buf, icalproperty_get_comment(p), sizeof buf);
2076 if (!IsEmptyStr(buf)) {
2077 if (msg->cm_fields['U'] != NULL) {
2078 free(msg->cm_fields['U']);
2080 msg->cm_fields['U'] = strdup(buf);
2084 /* Set the message date/time to the iCalendar start time */
2086 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
2089 idtstart = icaltime_as_timet(icalproperty_get_dtstart(p));
2091 if (msg->cm_fields['T'] != NULL) {
2092 free(msg->cm_fields['T']);
2094 msg->cm_fields['T'] = strdup("000000000000000000");
2095 sprintf(msg->cm_fields['T'], "%ld", idtstart);
2100 icalcomponent_free(cal);
2101 if (whole_cal != cal) {
2102 icalcomponent_free(whole_cal);
2111 * See if we need to prevent the object from being saved (we don't allow
2112 * MIME types other than text/calendar in "calendar" or "tasks" rooms).
2114 * If the message is being saved, we also set various message header fields
2115 * using data found in the iCalendar object.
2117 int ical_obj_beforesave(struct CtdlMessage *msg)
2119 /* First determine if this is a calendar or tasks room */
2120 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
2121 && (CC->room.QRdefaultview != VIEW_TASKS)
2123 return(0); /* Not an iCalendar-centric room */
2126 /* It must be an RFC822 message! */
2127 if (msg->cm_format_type != 4) {
2128 CtdlLogPrintf(CTDL_DEBUG, "Rejecting non-RFC822 message\n");
2129 return(1); /* You tried to save a non-RFC822 message! */
2132 if (msg->cm_fields['M'] == NULL) {
2133 return(1); /* You tried to save a null message! */
2136 /* Do all of our lovely back-end parsing */
2137 mime_parser(msg->cm_fields['M'],
2139 *ical_obj_beforesave_backend,
2150 * Things we need to do after saving a calendar event.
2152 void ical_obj_aftersave_backend(char *name, char *filename, char *partnum,
2153 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2154 char *encoding, char *cbid, void *cbuserdata)
2158 /* We're only interested in calendar items here. */
2159 if ( (strcasecmp(cbtype, "text/calendar"))
2160 && (strcasecmp(cbtype, "application/ics")) ) {
2164 /* Hunt for the UID and drop it in
2165 * the "user data" pointer for the MIME parser. When
2166 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2169 if ( (!strcasecmp(cbtype, "text/calendar"))
2170 || (!strcasecmp(cbtype, "application/ics")) ) {
2171 cal = icalcomponent_new_from_string(content);
2173 ical_saving_vevent(cal);
2174 icalcomponent_free(cal);
2181 * Things we need to do after saving a calendar event.
2182 * (This will start back end tasks such as automatic generation of invitations,
2183 * if such actions are appropriate.)
2185 int ical_obj_aftersave(struct CtdlMessage *msg)
2187 char roomname[ROOMNAMELEN];
2190 * If this isn't the Calendar> room, no further action is necessary.
2193 /* First determine if this is our room */
2194 MailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
2195 if (strcasecmp(roomname, CC->room.QRname)) {
2196 return(0); /* Not the Calendar room -- don't do anything. */
2199 /* It must be an RFC822 message! */
2200 if (msg->cm_format_type != 4) return(1);
2202 /* Reject null messages */
2203 if (msg->cm_fields['M'] == NULL) return(1);
2205 /* Now recurse through it looking for our icalendar data */
2206 mime_parser(msg->cm_fields['M'],
2208 *ical_obj_aftersave_backend,
2218 void ical_session_startup(void) {
2219 CIT_ICAL = malloc(sizeof(struct cit_ical));
2220 memset(CIT_ICAL, 0, sizeof(struct cit_ical));
2223 void ical_session_shutdown(void) {
2229 * Back end for ical_fixed_output()
2231 void ical_fixed_output_backend(icalcomponent *cal,
2238 p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
2240 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2243 p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
2245 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2248 p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
2250 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2253 /* If the component has attendees, iterate through them. */
2254 for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
2255 safestrncpy(buf, icalproperty_get_attendee(p), sizeof buf);
2256 if (!strncasecmp(buf, "MAILTO:", 7)) {
2258 /* screen name or email address */
2259 strcpy(buf, &buf[7]);
2261 cprintf("%s ", buf);
2266 /* If the component has subcomponents, recurse through them. */
2267 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2269 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2270 /* Recursively process subcomponent */
2271 ical_fixed_output_backend(c, recursion_level+1);
2278 * Function to output iCalendar data as plain text. Nobody uses MSG0
2279 * anymore, so really this is just so we expose the vCard data to the full
2282 void ical_fixed_output(char *ptr, int len) {
2286 stringy_cal = malloc(len + 1);
2287 safestrncpy(stringy_cal, ptr, len + 1);
2288 cal = icalcomponent_new_from_string(stringy_cal);
2296 ical_fixed_output_backend(cal, 0);
2298 /* Free the memory we obtained from libical's constructor */
2299 icalcomponent_free(cal);
2304 void serv_calendar_destroy(void)
2306 icaltimezone_free_builtin_timezones();
2310 * Register this module with the Citadel server.
2312 CTDL_MODULE_INIT(calendar)
2317 /* Tell libical to return errors instead of aborting if it gets bad data */
2318 icalerror_errors_are_fatal = 0;
2320 /* Initialize our hook functions */
2321 CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
2322 CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
2323 CtdlRegisterSessionHook(ical_create_room, EVT_LOGIN);
2324 CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCal commands");
2325 CtdlRegisterSessionHook(ical_session_startup, EVT_START);
2326 CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP);
2327 CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
2328 CtdlRegisterFixedOutputHook("application/ics", ical_fixed_output);
2329 CtdlRegisterCleanupHook(serv_calendar_destroy);
2332 /* return our Subversion id for the Log */