2 * This module implements iCalendar object processing and the Calendar>
3 * room on a Citadel server. It handles iCalendar objects using the
4 * iTIP protocol. See RFCs 2445 and 2446.
6 * Copyright (c) 1987-2015 by the citadel.org team
8 * This program is open source software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 3.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
17 #define PRODID "-//Citadel//NONSGML Citadel Calendar//EN"
19 #include "ctdl_module.h"
21 #include <libical/ical.h>
24 #include "internet_addressing.h"
25 #include "serv_calendar.h"
27 #include "euidindex.h"
28 #include "ical_dezonify.h"
33 struct ical_respond_data {
34 char desired_partnum[SIZ];
40 * Utility function to create a new VCALENDAR component with some of the
41 * required fields already set the way we like them.
43 icalcomponent *icalcomponent_new_citadel_vcalendar(void) {
44 icalcomponent *encaps;
46 encaps = icalcomponent_new_vcalendar();
48 syslog(LOG_CRIT, "ERROR: could not allocate component!\n");
52 /* Set the Product ID */
53 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
55 /* Set the Version Number */
56 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
63 * Utility function to encapsulate a subcomponent into a full VCALENDAR
65 icalcomponent *ical_encapsulate_subcomponent(icalcomponent *subcomp) {
66 icalcomponent *encaps;
68 /* If we're already looking at a full VCALENDAR component,
69 * don't bother ... just return itself.
71 if (icalcomponent_isa(subcomp) == ICAL_VCALENDAR_COMPONENT) {
75 /* Encapsulate the VEVENT component into a complete VCALENDAR */
76 encaps = icalcomponent_new_citadel_vcalendar();
77 if (encaps == NULL) return NULL;
79 /* Encapsulate the subcomponent inside */
80 icalcomponent_add_component(encaps, subcomp);
82 /* Return the object we just created. */
90 * Write a calendar object into the specified user's calendar room.
91 * If the supplied user is NULL, this function writes the calendar object
92 * to the currently selected room.
94 void ical_write_to_cal(struct ctdluser *u, icalcomponent *cal) {
97 icalcomponent *encaps = NULL;
98 struct CtdlMessage *msg = NULL;
99 icalcomponent *tmp=NULL;
101 if (cal == NULL) return;
103 /* If the supplied object is a subcomponent, encapsulate it in
104 * a full VCALENDAR component, and save that instead.
106 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
107 tmp = icalcomponent_new_clone(cal);
108 encaps = ical_encapsulate_subcomponent(tmp);
109 ical_write_to_cal(u, encaps);
110 icalcomponent_free(tmp);
111 icalcomponent_free(encaps);
115 ser = icalcomponent_as_ical_string_r(cal);
116 if (ser == NULL) return;
118 serlen = strlen(ser);
120 /* If the caller supplied a user, write to that user's default calendar room */
122 /* This handy API function does all the work for us. */
123 CtdlWriteObject(USERCALENDARROOM, /* which room */
124 "text/calendar", /* MIME type */
126 serlen + 1, /* length */
129 0, /* don't delete others of this type */
134 /* If the caller did not supply a user, write to the currently selected room */
136 struct CitContext *CCC = CC;
139 msg = malloc(sizeof(struct CtdlMessage));
140 memset(msg, 0, sizeof(struct CtdlMessage));
141 msg->cm_magic = CTDLMESSAGE_MAGIC;
142 msg->cm_anon_type = MES_NORMAL;
143 msg->cm_format_type = 4;
144 CM_SetField(msg, eAuthor, CCC->user.fullname, strlen(CCC->user.fullname));
145 CM_SetField(msg, eOriginalRoom, CCC->room.QRname, strlen(CCC->room.QRname));
146 CM_SetField(msg, eNodeName, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")));
147 CM_SetField(msg, eHumanNode, CtdlGetConfigStr("c_humannode"), strlen(CtdlGetConfigStr("c_humannode")));
149 MsgBody = NewStrBufPlain(NULL, serlen + 100);
150 StrBufAppendBufPlain(MsgBody, HKEY("Content-type: text/calendar\r\n\r\n"), 0);
151 StrBufAppendBufPlain(MsgBody, ser, serlen, 0);
153 CM_SetAsFieldSB(msg, eMesageText, &MsgBody);
155 /* Now write the data */
156 CtdlSubmitMsg(msg, NULL, "", QP_EADDR);
160 /* In either case, now we can free the serialized calendar object */
166 * Send a reply to a meeting invitation.
168 * 'request' is the invitation to reply to.
169 * 'action' is the string "accept" or "decline" or "tentative".
172 void ical_send_a_reply(icalcomponent *request, char *action) {
173 icalcomponent *the_reply = NULL;
174 icalcomponent *vevent = NULL;
175 icalproperty *attendee = NULL;
176 char attendee_string[SIZ];
177 icalproperty *organizer = NULL;
178 char organizer_string[SIZ];
179 icalproperty *summary = NULL;
180 char summary_string[SIZ];
181 icalproperty *me_attend = NULL;
182 recptypes *recp = NULL;
183 icalparameter *partstat = NULL;
184 char *serialized_reply = NULL;
185 char *reply_message_text = NULL;
187 struct CtdlMessage *msg = NULL;
188 recptypes *valid = NULL;
190 *organizer_string = '\0';
191 strcpy(summary_string, "Calendar item");
193 if (request == NULL) {
194 syslog(LOG_ERR, "ERROR: trying to reply to NULL event?\n");
198 the_reply = icalcomponent_new_clone(request);
199 if (the_reply == NULL) {
200 syslog(LOG_ERR, "ERROR: cannot clone request\n");
204 /* Change the method from REQUEST to REPLY */
205 icalcomponent_set_method(the_reply, ICAL_METHOD_REPLY);
207 vevent = icalcomponent_get_first_component(the_reply, ICAL_VEVENT_COMPONENT);
208 if (vevent != NULL) {
209 /* Hunt for attendees, removing ones that aren't us.
210 * (Actually, remove them all, cloning our own one so we can
211 * re-insert it later)
213 while (attendee = icalcomponent_get_first_property(vevent,
214 ICAL_ATTENDEE_PROPERTY), (attendee != NULL)
216 ch = icalproperty_get_attendee(attendee);
217 if ((ch != NULL) && !strncasecmp(ch, "MAILTO:", 7)) {
218 safestrncpy(attendee_string, ch + 7, sizeof (attendee_string));
219 striplt(attendee_string);
220 recp = validate_recipients(attendee_string, NULL, 0);
222 if (!strcasecmp(recp->recp_local, CC->user.fullname)) {
223 if (me_attend) icalproperty_free(me_attend);
224 me_attend = icalproperty_new_clone(attendee);
226 free_recipients(recp);
231 icalcomponent_remove_property(vevent, attendee);
232 icalproperty_free(attendee);
235 /* We found our own address in the attendee list. */
237 /* Change the partstat from NEEDS-ACTION to ACCEPT or DECLINE */
238 icalproperty_remove_parameter(me_attend, ICAL_PARTSTAT_PARAMETER);
240 if (!strcasecmp(action, "accept")) {
241 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_ACCEPTED);
243 else if (!strcasecmp(action, "decline")) {
244 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_DECLINED);
246 else if (!strcasecmp(action, "tentative")) {
247 partstat = icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE);
250 if (partstat) icalproperty_add_parameter(me_attend, partstat);
252 /* Now insert it back into the vevent. */
253 icalcomponent_add_property(vevent, me_attend);
256 /* Figure out who to send this thing to */
257 organizer = icalcomponent_get_first_property(vevent, ICAL_ORGANIZER_PROPERTY);
258 if (organizer != NULL) {
259 if (icalproperty_get_organizer(organizer)) {
260 strcpy(organizer_string,
261 icalproperty_get_organizer(organizer) );
264 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
265 strcpy(organizer_string, &organizer_string[7]);
266 striplt(organizer_string);
268 strcpy(organizer_string, "");
271 /* Extract the summary string -- we'll use it as the
272 * message subject for the reply
274 summary = icalcomponent_get_first_property(vevent, ICAL_SUMMARY_PROPERTY);
275 if (summary != NULL) {
276 if (icalproperty_get_summary(summary)) {
277 strcpy(summary_string,
278 icalproperty_get_summary(summary) );
283 /* Now generate the reply message and send it out. */
284 serialized_reply = icalcomponent_as_ical_string_r(the_reply);
285 icalcomponent_free(the_reply); /* don't need this anymore */
286 if (serialized_reply == NULL) return;
288 reply_message_text = malloc(strlen(serialized_reply) + SIZ);
289 if (reply_message_text != NULL) {
290 sprintf(reply_message_text,
291 "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
295 msg = CtdlMakeMessage(&CC->user,
296 organizer_string, /* to */
298 CC->room.QRname, 0, FMT_RFC822,
301 summary_string, /* Use summary for subject */
307 valid = validate_recipients(organizer_string, NULL, 0);
308 CtdlSubmitMsg(msg, valid, "", QP_EADDR);
310 free_recipients(valid);
313 free(serialized_reply);
319 * Callback function for mime parser that hunts for calendar content types
320 * and turns them into calendar objects. If something is found, it is placed
321 * in ird->cal, and the caller now owns that memory and is responsible for freeing it.
323 void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
324 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
325 char *cbid, void *cbuserdata) {
327 struct ical_respond_data *ird = NULL;
329 ird = (struct ical_respond_data *) cbuserdata;
331 /* desired_partnum can be set to "_HUNT_" to have it just look for
332 * the first part with a content type of text/calendar. Otherwise
333 * we have to only process the right one.
335 if (strcasecmp(ird->desired_partnum, "_HUNT_")) {
336 if (strcasecmp(partnum, ird->desired_partnum)) {
341 if ( (strcasecmp(cbtype, "text/calendar"))
342 && (strcasecmp(cbtype, "application/ics")) ) {
346 if (ird->cal != NULL) {
347 icalcomponent_free(ird->cal);
351 ird->cal = icalcomponent_new_from_string(content);
356 * Respond to a meeting request.
358 void ical_respond(long msgnum, char *partnum, char *action) {
359 struct CtdlMessage *msg = NULL;
360 struct ical_respond_data ird;
363 (strcasecmp(action, "accept"))
364 && (strcasecmp(action, "decline"))
366 cprintf("%d Action must be 'accept' or 'decline'\n",
367 ERROR + ILLEGAL_VALUE
372 msg = CtdlFetchMessage(msgnum, 1, 1);
374 cprintf("%d Message %ld not found.\n",
375 ERROR + ILLEGAL_VALUE,
381 memset(&ird, 0, sizeof ird);
382 strcpy(ird.desired_partnum, partnum);
383 mime_parser(CM_RANGE(msg, eMesageText),
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.
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 e = icalproperty_get_attendee(e_attendee);
545 r = icalproperty_get_attendee(r_attendee);
550 /* ...and if they do, remove the attendee from the event
551 * and replace it with the attendee from the reply. (The
552 * reply's copy will have the same address, but an updated
555 icalcomponent_remove_property(event, e_attendee);
556 icalproperty_free(e_attendee);
557 icalcomponent_remove_property(reply, r_attendee);
558 icalcomponent_add_property(event, r_attendee);
560 /* Since we diddled both sets of attendees, we have to start
561 * the iteration over again. This will not create an infinite
562 * loop because we removed the attendee from the reply. (That's
563 * why we cloned the reply, and that's what we mean by "ripping
572 /* Free the *clone* of the reply. */
573 icalcomponent_free(reply);
580 * Handle an incoming RSVP (object with method==ICAL_METHOD_REPLY) for a
581 * calendar event. The object has already been deserialized for us; all
582 * we have to do here is hunt for the event in our calendar, merge in the
583 * updated attendee status, and save it again.
585 * This function returns 0 on success, 1 if the event was not found in the
586 * user's calendar, or 2 if an internal error occurred.
588 int ical_update_my_calendar_with_reply(icalcomponent *cal) {
590 char hold_rm[ROOMNAMELEN];
591 long msgnum_being_replaced = 0;
592 struct CtdlMessage *msg = NULL;
593 struct original_event_container oec;
594 icalcomponent *original_event;
595 char *serialized_event = NULL;
596 char roomname[ROOMNAMELEN];
597 char *message_text = NULL;
599 /* Figure out just what event it is we're dealing with */
600 strcpy(uid, "--==<< InVaLiD uId >>==--");
601 ical_learn_uid_of_reply(uid, cal);
602 syslog(LOG_DEBUG, "UID of event being replied to is <%s>\n", uid);
604 strcpy(hold_rm, CC->room.QRname); /* save current room */
606 if (CtdlGetRoom(&CC->room, USERCALENDARROOM) != 0) {
607 CtdlGetRoom(&CC->room, hold_rm);
608 syslog(LOG_CRIT, "cannot get user calendar room\n");
613 * Look in the EUID index for a message with
614 * the Citadel EUID set to the value we're looking for. Since
615 * Citadel always sets the message EUID to the iCalendar UID of
616 * the event, this will work.
618 msgnum_being_replaced = CtdlLocateMessageByEuid(uid, &CC->room);
620 CtdlGetRoom(&CC->room, hold_rm); /* return to saved room */
622 syslog(LOG_DEBUG, "msgnum_being_replaced == %ld\n", msgnum_being_replaced);
623 if (msgnum_being_replaced == 0) {
624 return(1); /* no calendar event found */
627 /* Now we know the ID of the message containing the event being updated.
628 * We don't actually have to delete it; that'll get taken care of by the
629 * server when we save another event with the same UID. This just gives
630 * us the ability to load the event into memory so we can diddle the
633 msg = CtdlFetchMessage(msgnum_being_replaced, 1, 1);
635 return(2); /* internal error */
638 mime_parser(CM_RANGE(msg, eMesageText),
639 *ical_locate_original_event, /* callback function */
641 &oec, /* user data */
646 original_event = oec.c;
647 if (original_event == NULL) {
648 syslog(LOG_ERR, "ERROR: Original_component is NULL.\n");
652 /* Merge the attendee's updated status into the event */
653 ical_merge_attendee_reply(original_event, cal);
656 serialized_event = icalcomponent_as_ical_string_r(original_event);
657 icalcomponent_free(original_event); /* Don't need this anymore. */
658 if (serialized_event == NULL) return(2);
660 CtdlMailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
662 message_text = malloc(strlen(serialized_event) + SIZ);
663 if (message_text != NULL) {
664 sprintf(message_text,
665 "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
669 msg = CtdlMakeMessage(&CC->user,
670 "", /* No recipient */
671 "", /* No recipient */
682 CIT_ICAL->avoid_sending_invitations = 1;
683 CtdlSubmitMsg(msg, NULL, roomname, QP_EADDR);
685 CIT_ICAL->avoid_sending_invitations = 0;
688 free(serialized_event);
694 * Handle an incoming RSVP for an event. (This is the server subcommand part; it
695 * simply extracts the calendar object from the message, deserializes it, and
696 * passes it up to ical_update_my_calendar_with_reply() for processing.
698 void ical_handle_rsvp(long msgnum, char *partnum, char *action) {
699 struct CtdlMessage *msg = NULL;
700 struct ical_respond_data ird;
704 (strcasecmp(action, "update"))
705 && (strcasecmp(action, "ignore"))
707 cprintf("%d Action must be 'update' or 'ignore'\n",
708 ERROR + ILLEGAL_VALUE
713 msg = CtdlFetchMessage(msgnum, 1, 1);
715 cprintf("%d Message %ld not found.\n",
716 ERROR + ILLEGAL_VALUE,
722 memset(&ird, 0, sizeof ird);
723 strcpy(ird.desired_partnum, partnum);
724 mime_parser(CM_RANGE(msg, eMesageText),
725 *ical_locate_part, /* callback function */
727 (void *) &ird, /* user data */
731 /* We're done with the incoming message, because we now have a
732 * calendar object in memory.
737 * Here is the real meat of this function. Handle the event.
739 if (ird.cal != NULL) {
740 /* Update the user's calendar if necessary */
741 if (!strcasecmp(action, "update")) {
742 ret = ical_update_my_calendar_with_reply(ird.cal);
744 cprintf("%d Your calendar has been updated with this reply.\n",
748 cprintf("%d This event does not exist in your calendar.\n",
749 ERROR + FILE_NOT_FOUND);
752 cprintf("%d An internal error occurred.\n",
753 ERROR + INTERNAL_ERROR);
757 cprintf("%d This reply has been ignored.\n", CIT_OK);
760 /* Now that we've processed this message, we don't need it
761 * anymore. So delete it. (Don't do this anymore.)
762 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
765 /* Free the memory we allocated and return a response. */
766 icalcomponent_free(ird.cal);
771 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
775 /* should never get here */
780 * Search for a property in both the top level and in a VEVENT subcomponent
782 icalproperty *ical_ctdl_get_subprop(
784 icalproperty_kind which_prop
789 p = icalcomponent_get_first_property(cal, which_prop);
791 c = icalcomponent_get_first_component(cal,
792 ICAL_VEVENT_COMPONENT);
794 p = icalcomponent_get_first_property(c, which_prop);
802 * Check to see if two events overlap. Returns nonzero if they do.
803 * (This function is used in both Citadel and WebCit. If you change it in
804 * one place, change it in the other. Better yet, put it in a library.)
806 int ical_ctdl_is_overlap(
807 struct icaltimetype t1start,
808 struct icaltimetype t1end,
809 struct icaltimetype t2start,
810 struct icaltimetype t2end
812 if (icaltime_is_null_time(t1start)) return(0);
813 if (icaltime_is_null_time(t2start)) return(0);
815 /* if either event lacks end time, assume end = start */
816 if (icaltime_is_null_time(t1end))
817 memcpy(&t1end, &t1start, sizeof(struct icaltimetype));
819 if (t1end.is_date && icaltime_compare(t1start, t1end)) {
821 * the end date is non-inclusive so adjust it by one
822 * day because our test is inclusive, note that a day is
823 * not too much because we are talking about all day
825 * if start = end we assume that nevertheless the whole
828 icaltime_adjust(&t1end, -1, 0, 0, 0);
832 if (icaltime_is_null_time(t2end))
833 memcpy(&t2end, &t2start, sizeof(struct icaltimetype));
835 if (t2end.is_date && icaltime_compare(t2start, t2end)) {
836 icaltime_adjust(&t2end, -1, 0, 0, 0);
840 /* First, check for all-day events */
841 if (t1start.is_date || t2start.is_date) {
842 /* If event 1 ends before event 2 starts, we're in the clear. */
843 if (icaltime_compare_date_only(t1end, t2start) < 0) return(0);
845 /* If event 2 ends before event 1 starts, we're also ok. */
846 if (icaltime_compare_date_only(t2end, t1start) < 0) return(0);
851 /* syslog(LOG_DEBUG, "Comparing t1start %d:%d t1end %d:%d t2start %d:%d t2end %d:%d \n",
852 t1start.hour, t1start.minute, t1end.hour, t1end.minute,
853 t2start.hour, t2start.minute, t2end.hour, t2end.minute);
856 /* Now check for overlaps using date *and* time. */
858 /* If event 1 ends before event 2 starts, we're in the clear. */
859 if (icaltime_compare(t1end, t2start) <= 0) return(0);
860 /* syslog(LOG_DEBUG, "first passed\n"); */
862 /* If event 2 ends before event 1 starts, we're also ok. */
863 if (icaltime_compare(t2end, t1start) <= 0) return(0);
864 /* syslog(LOG_DEBUG, "second passed\n"); */
866 /* Otherwise, they overlap. */
871 * Phase 6 of "hunt for conflicts"
872 * called by ical_conflicts_phase5()
874 * Now both the proposed and existing events have been boiled down to start and end times.
875 * Check for overlap and output any conflicts.
877 * Returns nonzero if a conflict was reported. This allows the caller to stop iterating.
879 int ical_conflicts_phase6(struct icaltimetype t1start,
880 struct icaltimetype t1end,
881 struct icaltimetype t2start,
882 struct icaltimetype t2end,
883 long existing_msgnum,
884 char *conflict_event_uid,
885 char *conflict_event_summary,
888 int conflict_reported = 0;
892 tt = icaltime_as_timet_with_zone(t1start, t1start.zone);
893 syslog(LOG_DEBUG, "PROPOSED START: %s", ctime(&tt));
894 tt = icaltime_as_timet_with_zone(t1end, t1end.zone);
895 syslog(LOG_DEBUG, " PROPOSED END: %s", ctime(&tt));
896 tt = icaltime_as_timet_with_zone(t2start, t2start.zone);
897 syslog(LOG_DEBUG, "EXISTING START: %s", ctime(&tt));
898 tt = icaltime_as_timet_with_zone(t2end, t2end.zone);
899 syslog(LOG_DEBUG, " EXISTING END: %s", ctime(&tt));
902 /* compare and output */
904 if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
905 cprintf("%ld||%s|%s|%d|\n",
908 conflict_event_summary,
909 ( (!IsEmptyStr(compare_uid)
910 &&(!strcasecmp(compare_uid,
911 conflict_event_uid))) ? 1 : 0
914 conflict_reported = 1;
917 return(conflict_reported);
923 * Phase 5 of "hunt for conflicts"
924 * Called by ical_conflicts_phase4()
926 * We have the proposed event boiled down to start and end times.
927 * Now check it against an existing event.
929 void ical_conflicts_phase5(struct icaltimetype t1start,
930 struct icaltimetype t1end,
931 icalcomponent *existing_event,
932 long existing_msgnum,
935 char conflict_event_uid[SIZ];
936 char conflict_event_summary[SIZ];
937 struct icaltimetype t2start, t2end;
940 /* recur variables */
941 icalproperty *rrule = NULL;
942 struct icalrecurrencetype recur;
943 icalrecur_iterator *ritr = NULL;
944 struct icaldurationtype dur;
948 strcpy(conflict_event_uid, "");
949 strcpy(conflict_event_summary, "");
950 t2start = icaltime_null_time();
951 t2end = icaltime_null_time();
953 /* existing event stuff */
954 p = ical_ctdl_get_subprop(existing_event, ICAL_DTSTART_PROPERTY);
955 if (p == NULL) return;
956 if (p != NULL) t2start = icalproperty_get_dtstart(p);
957 if (icaltime_is_utc(t2start)) {
958 t2start.zone = icaltimezone_get_utc_timezone();
961 t2start.zone = icalcomponent_get_timezone(existing_event,
962 icalparameter_get_tzid(
963 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
967 t2start.zone = get_default_icaltimezone();
971 p = ical_ctdl_get_subprop(existing_event, ICAL_DTEND_PROPERTY);
973 t2end = icalproperty_get_dtend(p);
975 if (icaltime_is_utc(t2end)) {
976 t2end.zone = icaltimezone_get_utc_timezone();
979 t2end.zone = icalcomponent_get_timezone(existing_event,
980 icalparameter_get_tzid(
981 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
985 t2end.zone = get_default_icaltimezone();
988 dur = icaltime_subtract(t2end, t2start);
991 memset (&dur, 0, sizeof(struct icaldurationtype));
994 rrule = ical_ctdl_get_subprop(existing_event, ICAL_RRULE_PROPERTY);
996 recur = icalproperty_get_rrule(rrule);
997 ritr = icalrecur_iterator_new(recur, t2start);
1001 p = ical_ctdl_get_subprop(existing_event, ICAL_UID_PROPERTY);
1003 strcpy(conflict_event_uid, icalproperty_get_comment(p));
1006 p = ical_ctdl_get_subprop(existing_event, ICAL_SUMMARY_PROPERTY);
1008 strcpy(conflict_event_summary, icalproperty_get_comment(p));
1011 if (ical_conflicts_phase6(t1start, t1end, t2start, t2end,
1012 existing_msgnum, conflict_event_uid, conflict_event_summary, compare_uid))
1014 num_recur = MAX_RECUR + 1; /* force it out of scope, no need to continue */
1018 t2start = icalrecur_iterator_next(ritr);
1019 if (!icaltime_is_null_time(t2end)) {
1020 const icaltimezone *hold_zone = t2end.zone;
1021 t2end = icaltime_add(t2start, dur);
1022 t2end.zone = hold_zone;
1027 if (icaltime_compare(t2start, t1end) < 0) {
1028 num_recur = MAX_RECUR + 1; /* force it out of scope */
1031 } while ( (rrule) && (!icaltime_is_null_time(t2start)) && (num_recur < MAX_RECUR) );
1032 icalrecur_iterator_free(ritr);
1039 * Phase 4 of "hunt for conflicts"
1040 * Called by ical_hunt_for_conflicts_backend()
1042 * At this point we've got it boiled down to two icalcomponent events in memory.
1043 * If they conflict, output something to the client.
1045 void ical_conflicts_phase4(icalcomponent *proposed_event,
1046 icalcomponent *existing_event,
1047 long existing_msgnum)
1049 struct icaltimetype t1start, t1end;
1051 char compare_uid[SIZ];
1053 /* recur variables */
1054 icalproperty *rrule = NULL;
1055 struct icalrecurrencetype recur;
1056 icalrecur_iterator *ritr = NULL;
1057 struct icaldurationtype dur;
1060 /* initialization */
1061 t1end = icaltime_null_time();
1062 *compare_uid = '\0';
1064 /* proposed event stuff */
1066 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTSTART_PROPERTY);
1070 t1start = icalproperty_get_dtstart(p);
1072 if (icaltime_is_utc(t1start)) {
1073 t1start.zone = icaltimezone_get_utc_timezone();
1076 t1start.zone = icalcomponent_get_timezone(proposed_event,
1077 icalparameter_get_tzid(
1078 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1081 if (!t1start.zone) {
1082 t1start.zone = get_default_icaltimezone();
1086 p = ical_ctdl_get_subprop(proposed_event, ICAL_DTEND_PROPERTY);
1088 t1end = icalproperty_get_dtend(p);
1090 if (icaltime_is_utc(t1end)) {
1091 t1end.zone = icaltimezone_get_utc_timezone();
1094 t1end.zone = icalcomponent_get_timezone(proposed_event,
1095 icalparameter_get_tzid(
1096 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1100 t1end.zone = get_default_icaltimezone();
1104 dur = icaltime_subtract(t1end, t1start);
1107 memset (&dur, 0, sizeof(struct icaldurationtype));
1110 rrule = ical_ctdl_get_subprop(proposed_event, ICAL_RRULE_PROPERTY);
1112 recur = icalproperty_get_rrule(rrule);
1113 ritr = icalrecur_iterator_new(recur, t1start);
1116 p = ical_ctdl_get_subprop(proposed_event, ICAL_UID_PROPERTY);
1118 strcpy(compare_uid, icalproperty_get_comment(p));
1122 ical_conflicts_phase5(t1start, t1end, existing_event, existing_msgnum, compare_uid);
1125 t1start = icalrecur_iterator_next(ritr);
1126 if (!icaltime_is_null_time(t1end)) {
1127 const icaltimezone *hold_zone = t1end.zone;
1128 t1end = icaltime_add(t1start, dur);
1129 t1end.zone = hold_zone;
1134 } while ( (rrule) && (!icaltime_is_null_time(t1start)) && (num_recur < MAX_RECUR) );
1135 icalrecur_iterator_free(ritr);
1141 * Phase 3 of "hunt for conflicts"
1142 * Called by ical_hunt_for_conflicts()
1144 void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
1145 icalcomponent *proposed_event;
1146 struct CtdlMessage *msg = NULL;
1147 struct ical_respond_data ird;
1149 proposed_event = (icalcomponent *)data;
1151 msg = CtdlFetchMessage(msgnum, 1, 1);
1152 if (msg == NULL) return;
1153 memset(&ird, 0, sizeof ird);
1154 strcpy(ird.desired_partnum, "_HUNT_");
1155 mime_parser(CM_RANGE(msg, eMesageText),
1156 *ical_locate_part, /* callback function */
1158 (void *) &ird, /* user data */
1163 if (ird.cal == NULL) return;
1165 ical_conflicts_phase4(proposed_event, ird.cal, msgnum);
1166 icalcomponent_free(ird.cal);
1172 * Phase 2 of "hunt for conflicts" operation.
1173 * At this point we have a calendar object which represents the VEVENT that
1174 * is proposed for addition to the calendar. Now hunt through the user's
1175 * calendar room, and output zero or more existing VEVENTs which conflict
1178 void ical_hunt_for_conflicts(icalcomponent *cal) {
1179 char hold_rm[ROOMNAMELEN];
1181 strcpy(hold_rm, CC->room.QRname); /* save current room */
1183 if (CtdlGetRoom(&CC->room, USERCALENDARROOM) != 0) {
1184 CtdlGetRoom(&CC->room, hold_rm);
1185 cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
1189 cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
1191 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1194 ical_hunt_for_conflicts_backend,
1199 CtdlGetRoom(&CC->room, hold_rm); /* return to saved room */
1206 * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
1208 void ical_conflicts(long msgnum, char *partnum) {
1209 struct CtdlMessage *msg = NULL;
1210 struct ical_respond_data ird;
1212 msg = CtdlFetchMessage(msgnum, 1, 1);
1214 cprintf("%d Message %ld not found\n",
1215 ERROR + ILLEGAL_VALUE,
1221 memset(&ird, 0, sizeof ird);
1222 strcpy(ird.desired_partnum, partnum);
1223 mime_parser(CM_RANGE(msg, eMesageText),
1224 *ical_locate_part, /* callback function */
1226 (void *) &ird, /* user data */
1232 if (ird.cal != NULL) {
1233 ical_hunt_for_conflicts(ird.cal);
1234 icalcomponent_free(ird.cal);
1238 cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
1244 * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
1246 * fb The VFREEBUSY component to which we are appending
1247 * top_level_cal The top-level VCALENDAR component which contains a VEVENT to be added
1249 void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
1253 struct icalperiodtype this_event_period = icalperiodtype_null_period();
1254 icaltimetype dtstart;
1257 /* recur variables */
1258 icalproperty *rrule = NULL;
1259 struct icalrecurrencetype recur;
1260 icalrecur_iterator *ritr = NULL;
1261 struct icaldurationtype dur;
1264 if (!top_level_cal) return;
1266 /* Find the VEVENT component containing an event */
1267 cal = icalcomponent_get_first_component(top_level_cal, ICAL_VEVENT_COMPONENT);
1270 /* If this event is not opaque, the user isn't publishing it as
1271 * busy time, so don't bother doing anything else.
1273 p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
1275 v = icalproperty_get_value(p);
1277 if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
1284 * Now begin calculating the event start and end times.
1286 p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
1288 dtstart = icalproperty_get_dtstart(p);
1290 if (icaltime_is_utc(dtstart)) {
1291 dtstart.zone = icaltimezone_get_utc_timezone();
1294 dtstart.zone = icalcomponent_get_timezone(top_level_cal,
1295 icalparameter_get_tzid(
1296 icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
1299 if (!dtstart.zone) {
1300 dtstart.zone = get_default_icaltimezone();
1304 dtend = icalcomponent_get_dtend(cal);
1305 if (!icaltime_is_null_time(dtend)) {
1306 dur = icaltime_subtract(dtend, dtstart);
1309 memset (&dur, 0, sizeof(struct icaldurationtype));
1312 /* Is a recurrence specified? If so, get ready to process it... */
1313 rrule = ical_ctdl_get_subprop(cal, ICAL_RRULE_PROPERTY);
1315 recur = icalproperty_get_rrule(rrule);
1316 ritr = icalrecur_iterator_new(recur, dtstart);
1320 /* Convert the DTSTART and DTEND properties to an icalperiod. */
1321 this_event_period.start = dtstart;
1323 if (!icaltime_is_null_time(dtend)) {
1324 this_event_period.end = dtend;
1327 /* Convert the timestamps to UTC. It's ok to do this because we've already expanded
1328 * recurrences and this data is never going to get used again.
1330 this_event_period.start = icaltime_convert_to_zone(
1331 this_event_period.start,
1332 icaltimezone_get_utc_timezone()
1334 this_event_period.end = icaltime_convert_to_zone(
1335 this_event_period.end,
1336 icaltimezone_get_utc_timezone()
1340 icalcomponent_add_property(fb, icalproperty_new_freebusy(this_event_period));
1342 /* Make sure the DTSTART property of the freebusy *list* is set to
1343 * the DTSTART property of the *earliest event*.
1345 p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
1347 icalcomponent_set_dtstart(fb, this_event_period.start);
1350 if (icaltime_compare(this_event_period.start, icalcomponent_get_dtstart(fb)) < 0) {
1351 icalcomponent_set_dtstart(fb, this_event_period.start);
1355 /* Make sure the DTEND property of the freebusy *list* is set to
1356 * the DTEND property of the *latest event*.
1358 p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
1360 icalcomponent_set_dtend(fb, this_event_period.end);
1363 if (icaltime_compare(this_event_period.end, icalcomponent_get_dtend(fb)) > 0) {
1364 icalcomponent_set_dtend(fb, this_event_period.end);
1369 dtstart = icalrecur_iterator_next(ritr);
1370 if (!icaltime_is_null_time(dtend)) {
1371 dtend = icaltime_add(dtstart, dur);
1372 dtend.zone = dtstart.zone;
1373 dtend.is_utc = dtstart.is_utc;
1378 } while ( (rrule) && (!icaltime_is_null_time(dtstart)) && (num_recur < MAX_RECUR) ) ;
1379 icalrecur_iterator_free(ritr);
1385 * Backend for ical_freebusy()
1387 * This function simply loads the messages in the user's calendar room,
1388 * which contain VEVENTs, then strips them of all non-freebusy data, and
1389 * adds them to the supplied VCALENDAR.
1392 void ical_freebusy_backend(long msgnum, void *data) {
1394 struct CtdlMessage *msg = NULL;
1395 struct ical_respond_data ird;
1397 fb = (icalcomponent *)data; /* User-supplied data will be the VFREEBUSY component */
1399 msg = CtdlFetchMessage(msgnum, 1, 1);
1400 if (msg == NULL) return;
1401 memset(&ird, 0, sizeof ird);
1402 strcpy(ird.desired_partnum, "_HUNT_");
1403 mime_parser(CM_RANGE(msg, eMesageText),
1404 *ical_locate_part, /* callback function */
1406 (void *) &ird, /* user data */
1412 ical_add_to_freebusy(fb, ird.cal); /* Add VEVENT times to VFREEBUSY */
1413 icalcomponent_free(ird.cal);
1420 * Grab another user's free/busy times
1422 void ical_freebusy(char *who) {
1423 struct ctdluser usbuf;
1424 char calendar_room_name[ROOMNAMELEN];
1425 char hold_rm[ROOMNAMELEN];
1426 char *serialized_request = NULL;
1427 icalcomponent *encaps = NULL;
1428 icalcomponent *fb = NULL;
1429 int found_user = (-1);
1430 recptypes *recp = NULL;
1435 int config_lines = 0;
1437 /* First try an exact match. */
1438 found_user = CtdlGetUser(&usbuf, who);
1440 /* If not found, try it as an unqualified email address. */
1441 if (found_user != 0) {
1443 recp = validate_recipients(buf, NULL, 0);
1444 syslog(LOG_DEBUG, "Trying <%s>\n", buf);
1446 if (recp->num_local == 1) {
1447 found_user = CtdlGetUser(&usbuf, recp->recp_local);
1449 free_recipients(recp);
1453 /* If still not found, try it as an address qualified with the
1454 * primary FQDN of this Citadel node.
1456 if (found_user != 0) {
1457 snprintf(buf, sizeof buf, "%s@%s", who, CtdlGetConfigStr("c_fqdn"));
1458 syslog(LOG_DEBUG, "Trying <%s>\n", buf);
1459 recp = validate_recipients(buf, NULL, 0);
1461 if (recp->num_local == 1) {
1462 found_user = CtdlGetUser(&usbuf, recp->recp_local);
1464 free_recipients(recp);
1468 /* Still not found? Try qualifying it with every domain we
1469 * might have addresses in.
1471 if (found_user != 0) {
1472 config_lines = num_tokens(inetcfg, '\n');
1473 for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
1474 extract_token(buf, inetcfg, i, '\n', sizeof buf);
1475 extract_token(host, buf, 0, '|', sizeof host);
1476 extract_token(type, buf, 1, '|', sizeof type);
1478 if ( (!strcasecmp(type, "localhost"))
1479 || (!strcasecmp(type, "directory")) ) {
1480 snprintf(buf, sizeof buf, "%s@%s", who, host);
1481 syslog(LOG_DEBUG, "Trying <%s>\n", buf);
1482 recp = validate_recipients(buf, NULL, 0);
1484 if (recp->num_local == 1) {
1485 found_user = CtdlGetUser(&usbuf, recp->recp_local);
1487 free_recipients(recp);
1493 if (found_user != 0) {
1494 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
1498 CtdlMailboxName(calendar_room_name, sizeof calendar_room_name,
1499 &usbuf, USERCALENDARROOM);
1501 strcpy(hold_rm, CC->room.QRname); /* save current room */
1503 if (CtdlGetRoom(&CC->room, calendar_room_name) != 0) {
1504 cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
1505 CtdlGetRoom(&CC->room, hold_rm);
1509 /* Create a VFREEBUSY subcomponent */
1510 syslog(LOG_DEBUG, "Creating VFREEBUSY component\n");
1511 fb = icalcomponent_new_vfreebusy();
1513 cprintf("%d Internal error: cannot allocate memory.\n",
1514 ERROR + INTERNAL_ERROR);
1515 CtdlGetRoom(&CC->room, hold_rm);
1519 /* Set the method to PUBLISH */
1520 icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
1522 /* Set the DTSTAMP to right now. */
1523 icalcomponent_set_dtstamp(fb, icaltime_from_timet(time(NULL), 0));
1525 /* Add the user's email address as ORGANIZER */
1526 sprintf(buf, "MAILTO:%s", who);
1527 if (strchr(buf, '@') == NULL) {
1529 strcat(buf, CtdlGetConfigStr("c_fqdn"));
1531 for (i=0; buf[i]; ++i) {
1532 if (buf[i]==' ') buf[i] = '_';
1534 icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
1536 /* Add busy time from events */
1537 syslog(LOG_DEBUG, "Adding busy time from events\n");
1538 CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
1540 /* If values for DTSTART and DTEND are still not present, set them
1541 * to yesterday and tomorrow as default values.
1543 if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
1544 icalcomponent_set_dtstart(fb, icaltime_from_timet(time(NULL)-86400L, 0));
1546 if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
1547 icalcomponent_set_dtend(fb, icaltime_from_timet(time(NULL)+86400L, 0));
1550 /* Put the freebusy component into the calendar component */
1551 syslog(LOG_DEBUG, "Encapsulating\n");
1552 encaps = ical_encapsulate_subcomponent(fb);
1553 if (encaps == NULL) {
1554 icalcomponent_free(fb);
1555 cprintf("%d Internal error: cannot allocate memory.\n",
1556 ERROR + INTERNAL_ERROR);
1557 CtdlGetRoom(&CC->room, hold_rm);
1561 /* Set the method to PUBLISH */
1562 syslog(LOG_DEBUG, "Setting method\n");
1563 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1566 syslog(LOG_DEBUG, "Serializing\n");
1567 serialized_request = icalcomponent_as_ical_string_r(encaps);
1568 icalcomponent_free(encaps); /* Don't need this anymore. */
1570 cprintf("%d Free/busy for %s\n", LISTING_FOLLOWS, usbuf.fullname);
1571 if (serialized_request != NULL) {
1572 client_write(serialized_request, strlen(serialized_request));
1573 free(serialized_request);
1577 /* Go back to the room from which we came... */
1578 CtdlGetRoom(&CC->room, hold_rm);
1584 * Backend for ical_getics()
1586 * This is a ForEachMessage() callback function that searches the current room
1587 * for calendar events and adds them each into one big calendar component.
1589 void ical_getics_backend(long msgnum, void *data) {
1590 icalcomponent *encaps, *c;
1591 struct CtdlMessage *msg = NULL;
1592 struct ical_respond_data ird;
1594 encaps = (icalcomponent *)data;
1595 if (encaps == NULL) return;
1597 /* Look for the calendar event... */
1599 msg = CtdlFetchMessage(msgnum, 1, 1);
1600 if (msg == NULL) return;
1601 memset(&ird, 0, sizeof ird);
1602 strcpy(ird.desired_partnum, "_HUNT_");
1603 mime_parser(CM_RANGE(msg, eMesageText),
1604 *ical_locate_part, /* callback function */
1606 (void *) &ird, /* user data */
1611 if (ird.cal == NULL) return;
1613 /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
1614 * are responsible for "the_request"'s memory -- it will be freed
1615 * when we free "encaps".
1618 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1619 * in. This will almost never happen.
1621 if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
1622 icalcomponent_add_component(encaps, ird.cal);
1625 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1626 * and other components encapsulated inside, we have to extract them.
1629 for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
1631 c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
1633 /* For VTIMEZONE components, suppress duplicates of the same tzid */
1635 if (icalcomponent_isa(c) == ICAL_VTIMEZONE_COMPONENT) {
1636 icalproperty *p = icalcomponent_get_first_property(c, ICAL_TZID_PROPERTY);
1638 const char *tzid = icalproperty_get_tzid(p);
1639 if (!icalcomponent_get_timezone(encaps, tzid)) {
1640 icalcomponent_add_component(encaps,
1641 icalcomponent_new_clone(c));
1646 /* All other types of components can go in verbatim */
1648 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1651 icalcomponent_free(ird.cal);
1658 * Retrieve all of the calendar items in the current room, and output them
1659 * as a single icalendar object.
1661 void ical_getics(void)
1663 icalcomponent *encaps = NULL;
1666 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1667 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1668 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1669 return; /* Not an iCalendar-centric room */
1672 encaps = icalcomponent_new_vcalendar();
1673 if (encaps == NULL) {
1674 syslog(LOG_ALERT, "ERROR: could not allocate component!\n");
1675 cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
1679 cprintf("%d one big calendar\n", LISTING_FOLLOWS);
1681 /* Set the Product ID */
1682 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1684 /* Set the Version Number */
1685 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1687 /* Set the method to PUBLISH */
1688 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1690 /* Now go through the room encapsulating all calendar items. */
1691 CtdlForEachMessage(MSGS_ALL, 0, NULL,
1694 ical_getics_backend,
1698 ser = icalcomponent_as_ical_string_r(encaps);
1699 icalcomponent_free(encaps); /* Don't need this anymore. */
1700 client_write(ser, strlen(ser));
1707 * Helper callback function for ical_putics() to discover which TZID's we need.
1708 * Simply put the tzid name string into a hash table. After the callbacks are
1709 * done we'll go through them and attach the ones that we have.
1711 void ical_putics_grabtzids(icalparameter *param, void *data)
1713 const char *tzid = icalparameter_get_tzid(param);
1714 HashList *keys = (HashList *) data;
1716 if ( (keys) && (tzid) && (!IsEmptyStr(tzid)) ) {
1717 Put(keys, tzid, strlen(tzid), strdup(tzid), NULL);
1723 * Delete all of the calendar items in the current room, and replace them
1724 * with calendar items from a client-supplied data stream.
1726 void ical_putics(void)
1728 char *calstream = NULL;
1731 icalcomponent *encaps = NULL;
1732 HashList *tzidlist = NULL;
1738 /* Only allow this operation if we're in a room containing a calendar or tasks view */
1739 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
1740 &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
1741 cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
1745 /* Only allow this operation if we have permission to overwrite the existing calendar */
1746 if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
1747 cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
1751 cprintf("%d Transmit data now\n", SEND_LISTING);
1752 calstream = CtdlReadMessageBody(HKEY("000"), CtdlGetConfigLong("c_maxmsglen"), NULL, 0, 0);
1753 if (calstream == NULL) {
1757 cal = icalcomponent_new_from_string(calstream);
1760 /* We got our data stream -- now do something with it. */
1762 /* Delete the existing messages in the room, because we are overwriting
1763 * the entire calendar with an entire new (or updated) calendar.
1764 * (Careful: this opens an S_ROOMS critical section!)
1766 CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
1768 /* If the top-level component is *not* a VCALENDAR, we can drop it right
1769 * in. This will almost never happen.
1771 if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
1772 ical_write_to_cal(NULL, cal);
1775 * In the more likely event that we're looking at a VCALENDAR with the VEVENT
1776 * and other components encapsulated inside, we have to extract them.
1779 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
1781 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
1783 /* Non-VTIMEZONE components each get written as individual messages.
1784 * But we also need to attach the relevant VTIMEZONE components to them.
1786 if ( (icalcomponent_isa(c) != ICAL_VTIMEZONE_COMPONENT)
1787 && (encaps = icalcomponent_new_vcalendar()) ) {
1788 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
1789 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
1790 icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
1792 /* Attach any needed timezones here */
1793 tzidlist = NewHash(1, NULL);
1795 icalcomponent_foreach_tzid(c, ical_putics_grabtzids, tzidlist);
1797 HashPos = GetNewHashPos(tzidlist, 0);
1799 while (GetNextHashPos(tzidlist, HashPos, &len, &Key, &Value)) {
1800 syslog(LOG_DEBUG, "Attaching timezone '%s'\n", (char*) Value);
1801 icaltimezone *t = NULL;
1803 /* First look for a timezone attached to the original calendar */
1804 t = icalcomponent_get_timezone(cal, Value);
1806 /* Try built-in tzdata if the right one wasn't attached */
1808 t = icaltimezone_get_builtin_timezone(Value);
1811 /* I've got a valid timezone to attach. */
1813 icalcomponent_add_component(encaps,
1814 icalcomponent_new_clone(
1815 icaltimezone_get_component(t)
1821 DeleteHashPos(&HashPos);
1822 DeleteHash(&tzidlist);
1824 /* Now attach the component itself (usually a VEVENT or VTODO) */
1825 icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
1827 /* Write it to the message store */
1828 ical_write_to_cal(NULL, encaps);
1829 icalcomponent_free(encaps);
1834 icalcomponent_free(cal);
1839 * All Citadel calendar commands from the client come through here.
1841 void cmd_ical(char *argbuf)
1849 extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
1851 /* Allow "test" and "freebusy" subcommands without logging in. */
1853 if (!strcasecmp(subcmd, "test")) {
1854 cprintf("%d This server supports calendaring\n", CIT_OK);
1858 if (!strcasecmp(subcmd, "freebusy")) {
1859 extract_token(who, argbuf, 1, '|', sizeof who);
1864 if (!strcasecmp(subcmd, "sgi")) {
1865 CIT_ICAL->server_generated_invitations =
1866 (extract_int(argbuf, 1) ? 1 : 0) ;
1868 CIT_OK, CIT_ICAL->server_generated_invitations);
1872 if (CtdlAccessCheck(ac_logged_in)) return;
1874 if (!strcasecmp(subcmd, "respond")) {
1875 msgnum = extract_long(argbuf, 1);
1876 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1877 extract_token(action, argbuf, 3, '|', sizeof action);
1878 ical_respond(msgnum, partnum, action);
1882 if (!strcasecmp(subcmd, "handle_rsvp")) {
1883 msgnum = extract_long(argbuf, 1);
1884 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1885 extract_token(action, argbuf, 3, '|', sizeof action);
1886 ical_handle_rsvp(msgnum, partnum, action);
1890 if (!strcasecmp(subcmd, "conflicts")) {
1891 msgnum = extract_long(argbuf, 1);
1892 extract_token(partnum, argbuf, 2, '|', sizeof partnum);
1893 ical_conflicts(msgnum, partnum);
1897 if (!strcasecmp(subcmd, "getics")) {
1902 if (!strcasecmp(subcmd, "putics")) {
1907 cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
1913 * We don't know if the calendar room exists so we just create it at login
1915 void ical_CtdlCreateRoom(void)
1920 /* Create the calendar room if it doesn't already exist */
1921 CtdlCreateRoom(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
1923 /* Set expiration policy to manual; otherwise objects will be lost! */
1924 if (CtdlGetRoomLock(&qr, USERCALENDARROOM)) {
1925 syslog(LOG_CRIT, "Couldn't get the user calendar room!\n");
1928 qr.QRep.expire_mode = EXPIRE_MANUAL;
1929 qr.QRdefaultview = VIEW_CALENDAR; /* 3 = calendar view */
1930 CtdlPutRoomLock(&qr);
1932 /* Set the view to a calendar view */
1933 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1934 vbuf.v_view = VIEW_CALENDAR;
1935 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1937 /* Create the tasks list room if it doesn't already exist */
1938 CtdlCreateRoom(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
1940 /* Set expiration policy to manual; otherwise objects will be lost! */
1941 if (CtdlGetRoomLock(&qr, USERTASKSROOM)) {
1942 syslog(LOG_CRIT, "Couldn't get the user calendar room!\n");
1945 qr.QRep.expire_mode = EXPIRE_MANUAL;
1946 qr.QRdefaultview = VIEW_TASKS;
1947 CtdlPutRoomLock(&qr);
1949 /* Set the view to a task list view */
1950 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1951 vbuf.v_view = VIEW_TASKS;
1952 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1954 /* Create the notes room if it doesn't already exist */
1955 CtdlCreateRoom(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
1957 /* Set expiration policy to manual; otherwise objects will be lost! */
1958 if (CtdlGetRoomLock(&qr, USERNOTESROOM)) {
1959 syslog(LOG_CRIT, "Couldn't get the user calendar room!\n");
1962 qr.QRep.expire_mode = EXPIRE_MANUAL;
1963 qr.QRdefaultview = VIEW_NOTES;
1964 CtdlPutRoomLock(&qr);
1966 /* Set the view to a notes view */
1967 CtdlGetRelationship(&vbuf, &CC->user, &qr);
1968 vbuf.v_view = VIEW_NOTES;
1969 CtdlSetRelationship(&vbuf, &CC->user, &qr);
1976 * ical_send_out_invitations() is called by ical_saving_vevent() when it finds a VEVENT.
1978 * top_level_cal is the highest available level calendar object.
1979 * cal is the subcomponent containing the VEVENT.
1981 * Note: if you change the encapsulation code here, change it in WebCit's ical_encapsulate_subcomponent()
1983 void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal) {
1984 icalcomponent *the_request = NULL;
1985 char *serialized_request = NULL;
1986 icalcomponent *encaps = NULL;
1987 char *request_message_text = NULL;
1988 struct CtdlMessage *msg = NULL;
1989 recptypes *valid = NULL;
1990 char attendees_string[SIZ];
1991 int num_attendees = 0;
1992 char this_attendee[256];
1993 icalproperty *attendee = NULL;
1994 char summary_string[SIZ];
1995 icalproperty *summary = NULL;
1998 struct icaltimetype t;
1999 const icaltimezone *attached_zones[5] = { NULL, NULL, NULL, NULL, NULL };
2001 const icaltimezone *z;
2002 int num_zones_attached = 0;
2003 int zone_already_attached;
2004 icalparameter *tzidp = NULL;
2005 const char *tzidc = NULL;
2008 syslog(LOG_ERR, "ERROR: trying to reply to NULL event?\n");
2013 /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
2014 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
2015 ical_send_out_invitations(top_level_cal,
2016 icalcomponent_get_first_component(
2017 cal, ICAL_VEVENT_COMPONENT
2023 /* Clone the event */
2024 the_request = icalcomponent_new_clone(cal);
2025 if (the_request == NULL) {
2026 syslog(LOG_ERR, "ERROR: cannot clone calendar object\n");
2030 /* Extract the summary string -- we'll use it as the
2031 * message subject for the request
2033 strcpy(summary_string, "Meeting request");
2034 summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
2035 if (summary != NULL) {
2036 if (icalproperty_get_summary(summary)) {
2037 strcpy(summary_string,
2038 icalproperty_get_summary(summary) );
2042 /* Determine who the recipients of this message are (the attendees) */
2043 strcpy(attendees_string, "");
2044 for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
2045 const char *ch = icalproperty_get_attendee(attendee);
2046 if ((ch != NULL) && !strncasecmp(ch, "MAILTO:", 7)) {
2047 safestrncpy(this_attendee, ch + 7, sizeof(this_attendee));
2049 if (!CtdlIsMe(this_attendee, sizeof this_attendee)) { /* don't send an invitation to myself! */
2050 snprintf(&attendees_string[strlen(attendees_string)],
2051 sizeof(attendees_string) - strlen(attendees_string),
2060 syslog(LOG_DEBUG, "<%d> attendees: <%s>\n", num_attendees, attendees_string);
2062 /* If there are no attendees, there are no invitations to send, so...
2063 * don't bother putting one together! Punch out, Maverick!
2065 if (num_attendees == 0) {
2066 icalcomponent_free(the_request);
2070 /* Encapsulate the VEVENT component into a complete VCALENDAR */
2071 encaps = icalcomponent_new_vcalendar();
2072 if (encaps == NULL) {
2073 syslog(LOG_ALERT, "ERROR: could not allocate component!\n");
2074 icalcomponent_free(the_request);
2078 /* Set the Product ID */
2079 icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
2081 /* Set the Version Number */
2082 icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
2084 /* Set the method to REQUEST */
2085 icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
2087 /* Look for properties containing timezone parameters, to see if we need to attach VTIMEZONEs */
2088 for (p = icalcomponent_get_first_property(the_request, ICAL_ANY_PROPERTY);
2090 p = icalcomponent_get_next_property(the_request, ICAL_ANY_PROPERTY))
2092 if ( (icalproperty_isa(p) == ICAL_COMPLETED_PROPERTY)
2093 || (icalproperty_isa(p) == ICAL_CREATED_PROPERTY)
2094 || (icalproperty_isa(p) == ICAL_DATEMAX_PROPERTY)
2095 || (icalproperty_isa(p) == ICAL_DATEMIN_PROPERTY)
2096 || (icalproperty_isa(p) == ICAL_DTEND_PROPERTY)
2097 || (icalproperty_isa(p) == ICAL_DTSTAMP_PROPERTY)
2098 || (icalproperty_isa(p) == ICAL_DTSTART_PROPERTY)
2099 || (icalproperty_isa(p) == ICAL_DUE_PROPERTY)
2100 || (icalproperty_isa(p) == ICAL_EXDATE_PROPERTY)
2101 || (icalproperty_isa(p) == ICAL_LASTMODIFIED_PROPERTY)
2102 || (icalproperty_isa(p) == ICAL_MAXDATE_PROPERTY)
2103 || (icalproperty_isa(p) == ICAL_MINDATE_PROPERTY)
2104 || (icalproperty_isa(p) == ICAL_RECURRENCEID_PROPERTY)
2106 t = icalproperty_get_dtstart(p); // it's safe to use dtstart for all of them
2108 /* Determine the tzid in order for some of the conditions below to work */
2109 tzidp = icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER);
2111 tzidc = icalparameter_get_tzid(tzidp);
2117 /* First see if there's a timezone attached to the data structure itself */
2118 if (icaltime_is_utc(t)) {
2119 z = icaltimezone_get_utc_timezone();
2122 z = icaltime_get_timezone(t);
2125 /* If not, try to determine the tzid from the parameter using attached zones */
2126 if ((!z) && (tzidc)) {
2127 z = icalcomponent_get_timezone(top_level_cal, tzidc);
2130 /* Still no good? Try our internal database */
2131 if ((!z) && (tzidc)) {
2132 z = icaltimezone_get_builtin_timezone_from_tzid(tzidc);
2136 /* We have a valid timezone. Good. Now we need to attach it. */
2138 zone_already_attached = 0;
2139 for (i=0; i<5; ++i) {
2140 if (z == attached_zones[i]) {
2141 /* We've already got this one, no need to attach another. */
2142 ++zone_already_attached;
2145 if ((!zone_already_attached) && (num_zones_attached < 5)) {
2146 /* This is a new one, so attach it. */
2147 attached_zones[num_zones_attached++] = z;
2150 icalproperty_set_parameter(p,
2151 icalparameter_new_tzid(icaltimezone_get_tzid(z))
2157 /* Encapsulate any timezones we need */
2158 if (num_zones_attached > 0) for (i=0; i<num_zones_attached; ++i) {
2160 zc = icalcomponent_new_clone(icaltimezone_get_component(attached_zones[i]));
2161 icalcomponent_add_component(encaps, zc);
2164 /* Here we go: encapsulate the VEVENT into the VCALENDAR. We now no longer
2165 * are responsible for "the_request"'s memory -- it will be freed
2166 * when we free "encaps".
2168 icalcomponent_add_component(encaps, the_request);
2171 serialized_request = icalcomponent_as_ical_string_r(encaps);
2172 icalcomponent_free(encaps); /* Don't need this anymore. */
2173 if (serialized_request == NULL) return;
2175 reqsize = strlen(serialized_request) + SIZ;
2176 request_message_text = malloc(reqsize);
2177 if (request_message_text != NULL) {
2178 snprintf(request_message_text, reqsize,
2179 "Content-type: text/calendar\r\n\r\n%s\r\n",
2183 msg = CtdlMakeMessage(
2185 NULL, /* No single recipient here */
2186 NULL, /* No single recipient here */
2192 summary_string, /* Use summary for subject */
2194 request_message_text,
2199 valid = validate_recipients(attendees_string, NULL, 0);
2200 CtdlSubmitMsg(msg, valid, "", QP_EADDR);
2202 free_recipients(valid);
2205 free(serialized_request);
2210 * When a calendar object is being saved, determine whether it's a VEVENT
2211 * and the user saving it is the organizer. If so, send out invitations
2212 * to any listed attendees.
2214 * This function is recursive. The caller can simply supply the same object
2215 * as both arguments. When it recurses it will alter the second argument
2216 * while holding on to the top level object. This allows us to go back and
2217 * grab things like time zones which might be attached.
2220 void ical_saving_vevent(icalcomponent *top_level_cal, icalcomponent *cal) {
2222 icalproperty *organizer = NULL;
2223 char organizer_string[SIZ];
2225 syslog(LOG_DEBUG, "ical_saving_vevent() has been called!\n");
2227 /* Don't send out invitations unless the client wants us to. */
2228 if (CIT_ICAL->server_generated_invitations == 0) {
2232 /* Don't send out invitations if we've been asked not to. */
2233 if (CIT_ICAL->avoid_sending_invitations > 0) {
2237 strcpy(organizer_string, "");
2239 * The VEVENT subcomponent is the one we're interested in.
2240 * Send out invitations if, and only if, this user is the Organizer.
2242 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
2243 organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
2244 if (organizer != NULL) {
2245 if (icalproperty_get_organizer(organizer)) {
2246 strcpy(organizer_string,
2247 icalproperty_get_organizer(organizer));
2250 if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
2251 strcpy(organizer_string, &organizer_string[7]);
2252 striplt(organizer_string);
2254 * If the user saving the event is listed as the
2255 * organizer, then send out invitations.
2257 if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
2258 ical_send_out_invitations(top_level_cal, cal);
2263 /* If the component has subcomponents, recurse through them. */
2264 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2266 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2267 /* Recursively process subcomponent */
2268 ical_saving_vevent(top_level_cal, c);
2276 * Back end for ical_obj_beforesave()
2277 * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
2278 * the summary of the event (becomes message subject),
2279 * and the start time (becomes message date/time).
2281 void ical_obj_beforesave_backend(char *name, char *filename, char *partnum,
2282 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2283 char *encoding, char *cbid, void *cbuserdata)
2286 icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
2288 char new_uid[256] = "";
2289 struct CtdlMessage *msg = (struct CtdlMessage *) cbuserdata;
2293 /* We're only interested in calendar data. */
2294 if ( (strcasecmp(cbtype, "text/calendar"))
2295 && (strcasecmp(cbtype, "application/ics")) ) {
2299 /* Hunt for the UID and drop it in
2300 * the "user data" pointer for the MIME parser. When
2301 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2304 whole_cal = icalcomponent_new_from_string(content);
2307 if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
2308 nested_event = icalcomponent_get_first_component(
2309 cal, ICAL_VEVENT_COMPONENT);
2310 if (nested_event != NULL) {
2314 nested_todo = icalcomponent_get_first_component(
2315 cal, ICAL_VTODO_COMPONENT);
2316 if (nested_todo != NULL) {
2324 /* Set the message EUID to the iCalendar UID */
2326 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2328 /* If there's no uid we must generate one */
2329 generate_uuid(new_uid);
2330 icalcomponent_add_property(cal, icalproperty_new_uid(new_uid));
2331 p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
2334 pch = icalproperty_get_comment(p);
2335 if (!IsEmptyStr(pch)) {
2336 CM_SetField(msg, eExclusiveID, pch, strlen(pch));
2337 syslog(LOG_DEBUG, "Saving calendar UID <%s>\n", pch);
2341 /* Set the message subject to the iCalendar summary */
2343 p = ical_ctdl_get_subprop(cal, ICAL_SUMMARY_PROPERTY);
2345 pch = icalproperty_get_comment(p);
2346 if (!IsEmptyStr(pch)) {
2349 subj = rfc2047encode(pch, strlen(pch));
2350 CM_SetAsField(msg, eMsgSubject, &subj, strlen(subj));
2354 /* Set the message date/time to the iCalendar start time */
2356 p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
2359 idtstart = icaltime_as_timet(icalproperty_get_dtstart(p));
2361 CM_SetFieldLONG(msg, eTimestamp, idtstart);
2366 icalcomponent_free(cal);
2367 if (whole_cal != cal) {
2368 icalcomponent_free(whole_cal);
2377 * See if we need to prevent the object from being saved (we don't allow
2378 * MIME types other than text/calendar in "calendar" or "tasks" rooms).
2380 * If the message is being saved, we also set various message header fields
2381 * using data found in the iCalendar object.
2383 int ical_obj_beforesave(struct CtdlMessage *msg, recptypes *recp)
2385 /* First determine if this is a calendar or tasks room */
2386 if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
2387 && (CC->room.QRdefaultview != VIEW_TASKS)
2389 return(0); /* Not an iCalendar-centric room */
2392 /* It must be an RFC822 message! */
2393 if (msg->cm_format_type != 4) {
2394 syslog(LOG_DEBUG, "Rejecting non-RFC822 message\n");
2395 return(1); /* You tried to save a non-RFC822 message! */
2398 if (CM_IsEmpty(msg, eMesageText)) {
2399 return(1); /* You tried to save a null message! */
2402 /* Do all of our lovely back-end parsing */
2403 mime_parser(CM_RANGE(msg, eMesageText),
2404 *ical_obj_beforesave_backend,
2415 * Things we need to do after saving a calendar event.
2417 void ical_obj_aftersave_backend(char *name, char *filename, char *partnum,
2418 char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
2419 char *encoding, char *cbid, void *cbuserdata)
2423 /* We're only interested in calendar items here. */
2424 if ( (strcasecmp(cbtype, "text/calendar"))
2425 && (strcasecmp(cbtype, "application/ics")) ) {
2429 /* Hunt for the UID and drop it in
2430 * the "user data" pointer for the MIME parser. When
2431 * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
2434 if ( (!strcasecmp(cbtype, "text/calendar"))
2435 || (!strcasecmp(cbtype, "application/ics")) ) {
2436 cal = icalcomponent_new_from_string(content);
2438 ical_saving_vevent(cal, cal);
2439 icalcomponent_free(cal);
2446 * Things we need to do after saving a calendar event.
2447 * (This will start back end tasks such as automatic generation of invitations,
2448 * if such actions are appropriate.)
2450 int ical_obj_aftersave(struct CtdlMessage *msg, recptypes *recp)
2452 char roomname[ROOMNAMELEN];
2455 * If this isn't the Calendar> room, no further action is necessary.
2458 /* First determine if this is our room */
2459 CtdlMailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
2460 if (strcasecmp(roomname, CC->room.QRname)) {
2461 return(0); /* Not the Calendar room -- don't do anything. */
2464 /* It must be an RFC822 message! */
2465 if (msg->cm_format_type != 4) return(1);
2467 /* Reject null messages */
2468 if (CM_IsEmpty(msg, eMesageText)) return(1);
2470 /* Now recurse through it looking for our icalendar data */
2471 mime_parser(CM_RANGE(msg, eMesageText),
2472 *ical_obj_aftersave_backend,
2482 void ical_session_startup(void) {
2483 CIT_ICAL = malloc(sizeof(struct cit_ical));
2484 memset(CIT_ICAL, 0, sizeof(struct cit_ical));
2487 void ical_session_shutdown(void) {
2493 * Back end for ical_fixed_output()
2495 void ical_fixed_output_backend(icalcomponent *cal,
2503 p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
2505 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2508 p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
2510 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2513 p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
2515 cprintf("%s\n", (const char *)icalproperty_get_comment(p));
2518 /* If the component has attendees, iterate through them. */
2519 for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
2520 ch = icalproperty_get_attendee(p);
2522 !strncasecmp(ch, "MAILTO:", 7)) {
2524 /* screen name or email address */
2525 safestrncpy(buf, ch + 7, sizeof(buf));
2527 cprintf("%s ", buf);
2532 /* If the component has subcomponents, recurse through them. */
2533 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
2535 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
2536 /* Recursively process subcomponent */
2537 ical_fixed_output_backend(c, recursion_level+1);
2544 * Function to output iCalendar data as plain text. Nobody uses MSG0
2545 * anymore, so really this is just so we expose the vCard data to the full
2548 void ical_fixed_output(char *ptr, int len) {
2552 stringy_cal = malloc(len + 1);
2553 safestrncpy(stringy_cal, ptr, len + 1);
2554 cal = icalcomponent_new_from_string(stringy_cal);
2561 ical_fixed_output_backend(cal, 0);
2563 /* Free the memory we obtained from libical's constructor */
2564 icalcomponent_free(cal);
2569 void serv_calendar_destroy(void)
2571 icaltimezone_free_builtin_timezones();
2575 * Register this module with the Citadel server.
2577 CTDL_MODULE_INIT(calendar)
2582 /* Tell libical to return errors instead of aborting if it gets bad data */
2583 icalerror_errors_are_fatal = 0;
2585 /* Use our own application prefix in tzid's generated from system tzdata */
2586 icaltimezone_set_tzid_prefix("/citadel.org/");
2588 /* Initialize our hook functions */
2589 CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
2590 CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
2591 CtdlRegisterSessionHook(ical_CtdlCreateRoom, EVT_LOGIN, PRIO_LOGIN + 1);
2592 CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCal commands");
2593 CtdlRegisterSessionHook(ical_session_startup, EVT_START, PRIO_START + 1);
2594 CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP, PRIO_STOP + 80);
2595 CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
2596 CtdlRegisterFixedOutputHook("application/ics", ical_fixed_output);
2597 CtdlRegisterCleanupHook(serv_calendar_destroy);
2600 /* return our module name for the log */