+++ /dev/null
-/*
- * This module implements iCalendar object processing and the Calendar>
- * room on a Citadel server. It handles iCalendar objects using the
- * iTIP protocol. See RFCs 2445 and 2446.
- *
- * Copyright (c) 1987-2021 by the citadel.org team
- *
- * This program is open source software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#define PRODID "-//Citadel//NONSGML Citadel Calendar//EN"
-
-#include "ctdl_module.h"
-#include <libical/ical.h>
-#include "msgbase.h"
-#include "internet_addressing.h"
-#include "serv_calendar.h"
-#include "room_ops.h"
-#include "euidindex.h"
-#include "default_timezone.h"
-#include "config.h"
-
-struct ical_respond_data {
- char desired_partnum[SIZ];
- icalcomponent *cal;
-};
-
-
-/*
- * Utility function to create a new VCALENDAR component with some of the
- * required fields already set the way we like them.
- */
-icalcomponent *icalcomponent_new_citadel_vcalendar(void) {
- icalcomponent *encaps;
-
- encaps = icalcomponent_new_vcalendar();
- if (encaps == NULL) {
- syslog(LOG_ERR, "calendar: could not allocate component");
- return NULL;
- }
-
- /* Set the Product ID */
- icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
-
- /* Set the Version Number */
- icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
-
- return(encaps);
-}
-
-
-/*
- * Utility function to encapsulate a subcomponent into a full VCALENDAR
- */
-icalcomponent *ical_encapsulate_subcomponent(icalcomponent *subcomp) {
- icalcomponent *encaps;
-
- /* If we're already looking at a full VCALENDAR component,
- * don't bother ... just return itself.
- */
- if (icalcomponent_isa(subcomp) == ICAL_VCALENDAR_COMPONENT) {
- return subcomp;
- }
-
- /* Encapsulate the VEVENT component into a complete VCALENDAR */
- encaps = icalcomponent_new_citadel_vcalendar();
- if (encaps == NULL) return NULL;
-
- /* Encapsulate the subcomponent inside */
- icalcomponent_add_component(encaps, subcomp);
-
- /* Return the object we just created. */
- return(encaps);
-}
-
-
-/*
- * Write a calendar object into the specified user's calendar room.
- * If the supplied user is NULL, this function writes the calendar object
- * to the currently selected room.
- */
-void ical_write_to_cal(struct ctdluser *u, icalcomponent *cal) {
- char *ser = NULL;
- long serlen;
- icalcomponent *encaps = NULL;
- struct CtdlMessage *msg = NULL;
- icalcomponent *tmp=NULL;
-
- if (cal == NULL) return;
-
- /* If the supplied object is a subcomponent, encapsulate it in
- * a full VCALENDAR component, and save that instead.
- */
- if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
- tmp = icalcomponent_new_clone(cal);
- encaps = ical_encapsulate_subcomponent(tmp);
- ical_write_to_cal(u, encaps);
- icalcomponent_free(tmp);
- icalcomponent_free(encaps);
- return;
- }
-
- ser = icalcomponent_as_ical_string_r(cal);
- if (ser == NULL) return;
-
- serlen = strlen(ser);
-
- /* If the caller supplied a user, write to that user's default calendar room */
- if (u) {
- /* This handy API function does all the work for us. */
- CtdlWriteObject(USERCALENDARROOM, /* which room */
- "text/calendar", /* MIME type */
- ser, /* data */
- serlen + 1, /* length */
- u, /* which user */
- 0, /* not binary */
- 0 /* no flags */
- );
- }
-
- /* If the caller did not supply a user, write to the currently selected room */
- if (!u) {
- struct CitContext *CCC = CC;
- StrBuf *MsgBody;
-
- msg = malloc(sizeof(struct CtdlMessage));
- memset(msg, 0, sizeof(struct CtdlMessage));
- msg->cm_magic = CTDLMESSAGE_MAGIC;
- msg->cm_anon_type = MES_NORMAL;
- msg->cm_format_type = 4;
- CM_SetField(msg, eAuthor, CCC->user.fullname, strlen(CCC->user.fullname));
- CM_SetField(msg, eOriginalRoom, CCC->room.QRname, strlen(CCC->room.QRname));
-
- MsgBody = NewStrBufPlain(NULL, serlen + 100);
- StrBufAppendBufPlain(MsgBody, HKEY("Content-type: text/calendar\r\n\r\n"), 0);
- StrBufAppendBufPlain(MsgBody, ser, serlen, 0);
-
- CM_SetAsFieldSB(msg, eMesageText, &MsgBody);
-
- /* Now write the data */
- CtdlSubmitMsg(msg, NULL, "");
- CM_Free(msg);
- }
-
- /* In either case, now we can free the serialized calendar object */
- free(ser);
-}
-
-
-/*
- * Send a reply to a meeting invitation.
- *
- * 'request' is the invitation to reply to.
- * 'action' is the string "accept" or "decline" or "tentative".
- *
- */
-void ical_send_a_reply(icalcomponent *request, char *action) {
- icalcomponent *the_reply = NULL;
- icalcomponent *vevent = NULL;
- icalproperty *attendee = NULL;
- char attendee_string[SIZ];
- icalproperty *organizer = NULL;
- char organizer_string[SIZ];
- icalproperty *summary = NULL;
- char summary_string[SIZ];
- icalproperty *me_attend = NULL;
- struct recptypes *recp = NULL;
- icalparameter *partstat = NULL;
- char *serialized_reply = NULL;
- char *reply_message_text = NULL;
- const char *ch;
- struct CtdlMessage *msg = NULL;
- struct recptypes *valid = NULL;
-
- *organizer_string = '\0';
- strcpy(summary_string, "Calendar item");
-
- if (request == NULL) {
- syslog(LOG_ERR, "calendar: trying to reply to NULL event");
- return;
- }
-
- the_reply = icalcomponent_new_clone(request);
- if (the_reply == NULL) {
- syslog(LOG_ERR, "calendar: cannot clone request");
- return;
- }
-
- /* Change the method from REQUEST to REPLY */
- icalcomponent_set_method(the_reply, ICAL_METHOD_REPLY);
-
- vevent = icalcomponent_get_first_component(the_reply, ICAL_VEVENT_COMPONENT);
- if (vevent != NULL) {
- /* Hunt for attendees, removing ones that aren't us.
- * (Actually, remove them all, cloning our own one so we can
- * re-insert it later)
- */
- while (attendee = icalcomponent_get_first_property(vevent,
- ICAL_ATTENDEE_PROPERTY), (attendee != NULL)
- ) {
- ch = icalproperty_get_attendee(attendee);
- if ((ch != NULL) && !strncasecmp(ch, "MAILTO:", 7)) {
- safestrncpy(attendee_string, ch + 7, sizeof (attendee_string));
- striplt(attendee_string);
- recp = validate_recipients(attendee_string, NULL, 0);
- if (recp != NULL) {
- if (!strcasecmp(recp->recp_local, CC->user.fullname)) {
- if (me_attend) icalproperty_free(me_attend);
- me_attend = icalproperty_new_clone(attendee);
- }
- free_recipients(recp);
- }
- }
-
- /* Remove it... */
- icalcomponent_remove_property(vevent, attendee);
- icalproperty_free(attendee);
- }
-
- /* We found our own address in the attendee list. */
- if (me_attend) {
- /* Change the partstat from NEEDS-ACTION to ACCEPT or DECLINE */
- icalproperty_remove_parameter_by_kind(me_attend, ICAL_PARTSTAT_PARAMETER);
-
- if (!strcasecmp(action, "accept")) {
- partstat = icalparameter_new_partstat(ICAL_PARTSTAT_ACCEPTED);
- }
- else if (!strcasecmp(action, "decline")) {
- partstat = icalparameter_new_partstat(ICAL_PARTSTAT_DECLINED);
- }
- else if (!strcasecmp(action, "tentative")) {
- partstat = icalparameter_new_partstat(ICAL_PARTSTAT_TENTATIVE);
- }
-
- if (partstat) icalproperty_add_parameter(me_attend, partstat);
-
- /* Now insert it back into the vevent. */
- icalcomponent_add_property(vevent, me_attend);
- }
-
- /* Figure out who to send this thing to */
- organizer = icalcomponent_get_first_property(vevent, ICAL_ORGANIZER_PROPERTY);
- if (organizer != NULL) {
- if (icalproperty_get_organizer(organizer)) {
- strcpy(organizer_string,
- icalproperty_get_organizer(organizer) );
- }
- }
- if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
- strcpy(organizer_string, &organizer_string[7]);
- striplt(organizer_string);
- } else {
- strcpy(organizer_string, "");
- }
-
- /* Extract the summary string -- we'll use it as the
- * message subject for the reply
- */
- summary = icalcomponent_get_first_property(vevent, ICAL_SUMMARY_PROPERTY);
- if (summary != NULL) {
- if (icalproperty_get_summary(summary)) {
- strcpy(summary_string,
- icalproperty_get_summary(summary) );
- }
- }
- }
-
- /* Now generate the reply message and send it out. */
- serialized_reply = icalcomponent_as_ical_string_r(the_reply);
- icalcomponent_free(the_reply); /* don't need this anymore */
- if (serialized_reply == NULL) return;
-
- reply_message_text = malloc(strlen(serialized_reply) + SIZ);
- if (reply_message_text != NULL) {
- sprintf(reply_message_text,
- "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
- serialized_reply
- );
-
- msg = CtdlMakeMessage(&CC->user,
- organizer_string, /* to */
- "", /* cc */
- CC->room.QRname, 0, FMT_RFC822,
- "",
- "",
- summary_string, /* Use summary for subject */
- NULL,
- reply_message_text,
- NULL);
-
- if (msg != NULL) {
- valid = validate_recipients(organizer_string, NULL, 0);
- CtdlSubmitMsg(msg, valid, "");
- CM_Free(msg);
- free_recipients(valid);
- }
- }
- free(serialized_reply);
-}
-
-
-/*
- * Callback function for mime parser that hunts for calendar content types
- * and turns them into calendar objects. If something is found, it is placed
- * in ird->cal, and the caller now owns that memory and is responsible for freeing it.
- */
-void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
- void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
- char *cbid, void *cbuserdata) {
-
- struct ical_respond_data *ird = NULL;
-
- ird = (struct ical_respond_data *) cbuserdata;
-
- /* desired_partnum can be set to "_HUNT_" to have it just look for
- * the first part with a content type of text/calendar. Otherwise
- * we have to only process the right one.
- */
- if (strcasecmp(ird->desired_partnum, "_HUNT_")) {
- if (strcasecmp(partnum, ird->desired_partnum)) {
- return;
- }
- }
-
- if ( (strcasecmp(cbtype, "text/calendar"))
- && (strcasecmp(cbtype, "application/ics")) ) {
- return;
- }
-
- if (ird->cal != NULL) {
- icalcomponent_free(ird->cal);
- ird->cal = NULL;
- }
-
- ird->cal = icalcomponent_new_from_string(content);
-}
-
-
-/*
- * Respond to a meeting request.
- */
-void ical_respond(long msgnum, char *partnum, char *action) {
- struct CtdlMessage *msg = NULL;
- struct ical_respond_data ird;
-
- if (
- (strcasecmp(action, "accept"))
- && (strcasecmp(action, "decline"))
- ) {
- cprintf("%d Action must be 'accept' or 'decline'\n",
- ERROR + ILLEGAL_VALUE
- );
- return;
- }
-
- msg = CtdlFetchMessage(msgnum, 1);
- if (msg == NULL) {
- cprintf("%d Message %ld not found.\n",
- ERROR + ILLEGAL_VALUE,
- (long)msgnum
- );
- return;
- }
-
- memset(&ird, 0, sizeof ird);
- strcpy(ird.desired_partnum, partnum);
- mime_parser(CM_RANGE(msg, eMesageText),
- *ical_locate_part, /* callback function */
- NULL, NULL,
- (void *) &ird, /* user data */
- 0
- );
-
- /* We're done with the incoming message, because we now have a
- * calendar object in memory.
- */
- CM_Free(msg);
-
- /*
- * Here is the real meat of this function. Handle the event.
- */
- if (ird.cal != NULL) {
- /* Save this in the user's calendar if necessary */
- if (!strcasecmp(action, "accept")) {
- ical_write_to_cal(&CC->user, ird.cal);
- }
-
- /* Send a reply if necessary */
- if (icalcomponent_get_method(ird.cal) == ICAL_METHOD_REQUEST) {
- ical_send_a_reply(ird.cal, action);
- }
-
- /* We used to delete the invitation after handling it.
- * We don't do that anymore, but here is the code that handled it:
- * CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
- */
-
- /* Free the memory we allocated and return a response. */
- icalcomponent_free(ird.cal);
- ird.cal = NULL;
- cprintf("%d ok\n", CIT_OK);
- return;
- }
- else {
- cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
- return;
- }
-
- /* should never get here */
-}
-
-
-/*
- * Figure out the UID of the calendar event being referred to in a
- * REPLY object. This function is recursive.
- */
-void ical_learn_uid_of_reply(char *uidbuf, icalcomponent *cal) {
- icalcomponent *subcomponent;
- icalproperty *p;
-
- /* If this object is a REPLY, then extract the UID. */
- if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
- p = icalcomponent_get_first_property(cal, ICAL_UID_PROPERTY);
- if (p != NULL) {
- strcpy(uidbuf, icalproperty_get_comment(p));
- }
- }
-
- /* Otherwise, recurse through any VEVENT subcomponents. We do NOT want the
- * UID of the reply; we want the UID of the invitation being replied to.
- */
- for (subcomponent = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
- subcomponent != NULL;
- subcomponent = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT) ) {
- ical_learn_uid_of_reply(uidbuf, subcomponent);
- }
-}
-
-
-/*
- * ical_update_my_calendar_with_reply() refers to this callback function; when we
- * locate the message containing the calendar event we're replying to, this function
- * gets called. It basically just sticks the message number in a supplied buffer.
- */
-void ical_hunt_for_event_to_update(long msgnum, void *data) {
- long *msgnumptr;
-
- msgnumptr = (long *) data;
- *msgnumptr = msgnum;
-}
-
-
-struct original_event_container {
- icalcomponent *c;
-};
-
-/*
- * Callback function for mime parser that hunts for calendar content types
- * and turns them into calendar objects (called by ical_update_my_calendar_with_reply()
- * to fetch the object being updated)
- */
-void ical_locate_original_event(char *name, char *filename, char *partnum, char *disp,
- void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
- char *cbid, void *cbuserdata) {
-
- struct original_event_container *oec = NULL;
-
- if ( (strcasecmp(cbtype, "text/calendar"))
- && (strcasecmp(cbtype, "application/ics")) ) {
- return;
- }
- oec = (struct original_event_container *) cbuserdata;
- if (oec->c != NULL) {
- icalcomponent_free(oec->c);
- }
- oec->c = icalcomponent_new_from_string(content);
-}
-
-
-/*
- * Merge updated attendee information from a REPLY into an existing event.
- */
-void ical_merge_attendee_reply(icalcomponent *event, icalcomponent *reply) {
- icalcomponent *c;
- icalproperty *e_attendee, *r_attendee;
-
- /* First things first. If we're not looking at a VEVENT component,
- * recurse through subcomponents until we find one.
- */
- if (icalcomponent_isa(event) != ICAL_VEVENT_COMPONENT) {
- for (c = icalcomponent_get_first_component(event, ICAL_VEVENT_COMPONENT);
- c != NULL;
- c = icalcomponent_get_next_component(event, ICAL_VEVENT_COMPONENT) ) {
- ical_merge_attendee_reply(c, reply);
- }
- return;
- }
-
- /* Now do the same thing with the reply.
- */
- if (icalcomponent_isa(reply) != ICAL_VEVENT_COMPONENT) {
- for (c = icalcomponent_get_first_component(reply, ICAL_VEVENT_COMPONENT);
- c != NULL;
- c = icalcomponent_get_next_component(reply, ICAL_VEVENT_COMPONENT) ) {
- ical_merge_attendee_reply(event, c);
- }
- return;
- }
-
- /* Clone the reply, because we're going to rip its guts out. */
- reply = icalcomponent_new_clone(reply);
-
- /* At this point we're looking at the correct subcomponents.
- * Iterate through the attendees looking for a match.
- */
-STARTOVER:
- for (e_attendee = icalcomponent_get_first_property(event, ICAL_ATTENDEE_PROPERTY);
- e_attendee != NULL;
- e_attendee = icalcomponent_get_next_property(event, ICAL_ATTENDEE_PROPERTY)) {
-
- for (r_attendee = icalcomponent_get_first_property(reply, ICAL_ATTENDEE_PROPERTY);
- r_attendee != NULL;
- r_attendee = icalcomponent_get_next_property(reply, ICAL_ATTENDEE_PROPERTY)) {
-
- /* Check to see if these two attendees match...
- */
- const char *e, *r;
- e = icalproperty_get_attendee(e_attendee);
- r = icalproperty_get_attendee(r_attendee);
-
- if ((e != NULL) &&
- (r != NULL) &&
- !strcasecmp(e, r)) {
- /* ...and if they do, remove the attendee from the event
- * and replace it with the attendee from the reply. (The
- * reply's copy will have the same address, but an updated
- * status.)
- */
- icalcomponent_remove_property(event, e_attendee);
- icalproperty_free(e_attendee);
- icalcomponent_remove_property(reply, r_attendee);
- icalcomponent_add_property(event, r_attendee);
-
- /* Since we diddled both sets of attendees, we have to start
- * the iteration over again. This will not create an infinite
- * loop because we removed the attendee from the reply. (That's
- * why we cloned the reply, and that's what we mean by "ripping
- * its guts out.")
- */
- goto STARTOVER;
- }
-
- }
- }
-
- /* Free the *clone* of the reply. */
- icalcomponent_free(reply);
-}
-
-
-/*
- * Handle an incoming RSVP (object with method==ICAL_METHOD_REPLY) for a
- * calendar event. The object has already been deserialized for us; all
- * we have to do here is hunt for the event in our calendar, merge in the
- * updated attendee status, and save it again.
- *
- * This function returns 0 on success, 1 if the event was not found in the
- * user's calendar, or 2 if an internal error occurred.
- */
-int ical_update_my_calendar_with_reply(icalcomponent *cal) {
- char uid[SIZ];
- char hold_rm[ROOMNAMELEN];
- long msgnum_being_replaced = 0;
- struct CtdlMessage *msg = NULL;
- struct original_event_container oec;
- icalcomponent *original_event;
- char *serialized_event = NULL;
- char roomname[ROOMNAMELEN];
- char *message_text = NULL;
-
- /* Figure out just what event it is we're dealing with */
- strcpy(uid, "--==<< InVaLiD uId >>==--");
- ical_learn_uid_of_reply(uid, cal);
- syslog(LOG_DEBUG, "calendar: UID of event being replied to is <%s>", uid);
-
- strcpy(hold_rm, CC->room.QRname); /* save current room */
-
- if (CtdlGetRoom(&CC->room, USERCALENDARROOM) != 0) {
- CtdlGetRoom(&CC->room, hold_rm);
- syslog(LOG_ERR, "calendar: cannot get user calendar room");
- return(2);
- }
-
- /*
- * Look in the EUID index for a message with
- * the Citadel EUID set to the value we're looking for. Since
- * Citadel always sets the message EUID to the iCalendar UID of
- * the event, this will work.
- */
- msgnum_being_replaced = CtdlLocateMessageByEuid(uid, &CC->room);
-
- CtdlGetRoom(&CC->room, hold_rm); /* return to saved room */
-
- syslog(LOG_DEBUG, "calendar: msgnum_being_replaced == %ld", msgnum_being_replaced);
- if (msgnum_being_replaced == 0) {
- return(1); /* no calendar event found */
- }
-
- /* Now we know the ID of the message containing the event being updated.
- * We don't actually have to delete it; that'll get taken care of by the
- * server when we save another event with the same UID. This just gives
- * us the ability to load the event into memory so we can diddle the
- * attendees.
- */
- msg = CtdlFetchMessage(msgnum_being_replaced, 1);
- if (msg == NULL) {
- return(2); /* internal error */
- }
- oec.c = NULL;
- mime_parser(CM_RANGE(msg, eMesageText),
- *ical_locate_original_event, /* callback function */
- NULL, NULL,
- &oec, /* user data */
- 0
- );
- CM_Free(msg);
-
- original_event = oec.c;
- if (original_event == NULL) {
- syslog(LOG_ERR, "calendar: original_component is NULL");
- return(2);
- }
-
- /* Merge the attendee's updated status into the event */
- ical_merge_attendee_reply(original_event, cal);
-
- /* Serialize it */
- serialized_event = icalcomponent_as_ical_string_r(original_event);
- icalcomponent_free(original_event); /* Don't need this anymore. */
- if (serialized_event == NULL) return(2);
-
- CtdlMailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
-
- message_text = malloc(strlen(serialized_event) + SIZ);
- if (message_text != NULL) {
- sprintf(message_text,
- "Content-type: text/calendar; charset=\"utf-8\"\r\n\r\n%s\r\n",
- serialized_event
- );
-
- msg = CtdlMakeMessage(&CC->user,
- "", /* No recipient */
- "", /* No recipient */
- roomname,
- 0, FMT_RFC822,
- "",
- "",
- "", /* no subject */
- NULL,
- message_text,
- NULL);
-
- if (msg != NULL) {
- CIT_ICAL->avoid_sending_invitations = 1;
- CtdlSubmitMsg(msg, NULL, roomname);
- CM_Free(msg);
- CIT_ICAL->avoid_sending_invitations = 0;
- }
- }
- free(serialized_event);
- return(0);
-}
-
-
-/*
- * Handle an incoming RSVP for an event. (This is the server subcommand part; it
- * simply extracts the calendar object from the message, deserializes it, and
- * passes it up to ical_update_my_calendar_with_reply() for processing.
- */
-void ical_handle_rsvp(long msgnum, char *partnum, char *action) {
- struct CtdlMessage *msg = NULL;
- struct ical_respond_data ird;
- int ret;
-
- if (
- (strcasecmp(action, "update"))
- && (strcasecmp(action, "ignore"))
- ) {
- cprintf("%d Action must be 'update' or 'ignore'\n",
- ERROR + ILLEGAL_VALUE
- );
- return;
- }
-
- msg = CtdlFetchMessage(msgnum, 1);
- if (msg == NULL) {
- cprintf("%d Message %ld not found.\n",
- ERROR + ILLEGAL_VALUE,
- (long)msgnum
- );
- return;
- }
-
- memset(&ird, 0, sizeof ird);
- strcpy(ird.desired_partnum, partnum);
- mime_parser(CM_RANGE(msg, eMesageText),
- *ical_locate_part, /* callback function */
- NULL, NULL,
- (void *) &ird, /* user data */
- 0
- );
-
- /* We're done with the incoming message, because we now have a
- * calendar object in memory.
- */
- CM_Free(msg);
-
- /*
- * Here is the real meat of this function. Handle the event.
- */
- if (ird.cal != NULL) {
- /* Update the user's calendar if necessary */
- if (!strcasecmp(action, "update")) {
- ret = ical_update_my_calendar_with_reply(ird.cal);
- if (ret == 0) {
- cprintf("%d Your calendar has been updated with this reply.\n",
- CIT_OK);
- }
- else if (ret == 1) {
- cprintf("%d This event does not exist in your calendar.\n",
- ERROR + FILE_NOT_FOUND);
- }
- else {
- cprintf("%d An internal error occurred.\n",
- ERROR + INTERNAL_ERROR);
- }
- }
- else {
- cprintf("%d This reply has been ignored.\n", CIT_OK);
- }
-
- /* Now that we've processed this message, we don't need it
- * anymore. So delete it. (Don't do this anymore.)
- CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
- */
-
- /* Free the memory we allocated and return a response. */
- icalcomponent_free(ird.cal);
- ird.cal = NULL;
- return;
- }
- else {
- cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
- return;
- }
-
- /* should never get here */
-}
-
-
-/*
- * Search for a property in both the top level and in a VEVENT subcomponent
- */
-icalproperty *ical_ctdl_get_subprop(
- icalcomponent *cal,
- icalproperty_kind which_prop
-) {
- icalproperty *p;
- icalcomponent *c;
-
- p = icalcomponent_get_first_property(cal, which_prop);
- if (p == NULL) {
- c = icalcomponent_get_first_component(cal,
- ICAL_VEVENT_COMPONENT);
- if (c != NULL) {
- p = icalcomponent_get_first_property(c, which_prop);
- }
- }
- return p;
-}
-
-
-/*
- * Check to see if two events overlap. Returns nonzero if they do.
- * (This function is used in both Citadel and WebCit. If you change it in
- * one place, change it in the other. Better yet, put it in a library.)
- */
-int ical_ctdl_is_overlap(
- struct icaltimetype t1start,
- struct icaltimetype t1end,
- struct icaltimetype t2start,
- struct icaltimetype t2end
-) {
- if (icaltime_is_null_time(t1start)) return(0);
- if (icaltime_is_null_time(t2start)) return(0);
-
- /* if either event lacks end time, assume end = start */
- if (icaltime_is_null_time(t1end))
- memcpy(&t1end, &t1start, sizeof(struct icaltimetype));
- else {
- if (t1end.is_date && icaltime_compare(t1start, t1end)) {
- /*
- * the end date is non-inclusive so adjust it by one
- * day because our test is inclusive, note that a day is
- * not too much because we are talking about all day
- * events
- * if start = end we assume that nevertheless the whole
- * day is meant
- */
- icaltime_adjust(&t1end, -1, 0, 0, 0);
- }
- }
-
- if (icaltime_is_null_time(t2end))
- memcpy(&t2end, &t2start, sizeof(struct icaltimetype));
- else {
- if (t2end.is_date && icaltime_compare(t2start, t2end)) {
- icaltime_adjust(&t2end, -1, 0, 0, 0);
- }
- }
-
- /* First, check for all-day events */
- if (t1start.is_date || t2start.is_date) {
- /* If event 1 ends before event 2 starts, we're in the clear. */
- if (icaltime_compare_date_only(t1end, t2start) < 0) return(0);
-
- /* If event 2 ends before event 1 starts, we're also ok. */
- if (icaltime_compare_date_only(t2end, t1start) < 0) return(0);
-
- return(1);
- }
-
- /* syslog(LOG_DEBUG, "Comparing t1start %d:%d t1end %d:%d t2start %d:%d t2end %d:%d",
- t1start.hour, t1start.minute, t1end.hour, t1end.minute,
- t2start.hour, t2start.minute, t2end.hour, t2end.minute);
- */
-
- /* Now check for overlaps using date *and* time. */
-
- /* If event 1 ends before event 2 starts, we're in the clear. */
- if (icaltime_compare(t1end, t2start) <= 0) return(0);
- /* syslog(LOG_DEBUG, "calendar: first passed"); */
-
- /* If event 2 ends before event 1 starts, we're also ok. */
- if (icaltime_compare(t2end, t1start) <= 0) return(0);
- /* syslog(LOG_DEBUG, "calendar: second passed"); */
-
- /* Otherwise, they overlap. */
- return(1);
-}
-
-
-/*
- * Phase 6 of "hunt for conflicts"
- * called by ical_conflicts_phase5()
- *
- * Now both the proposed and existing events have been boiled down to start and end times.
- * Check for overlap and output any conflicts.
- *
- * Returns nonzero if a conflict was reported. This allows the caller to stop iterating.
- */
-int ical_conflicts_phase6(struct icaltimetype t1start,
- struct icaltimetype t1end,
- struct icaltimetype t2start,
- struct icaltimetype t2end,
- long existing_msgnum,
- char *conflict_event_uid,
- char *conflict_event_summary,
- char *compare_uid)
-{
- int conflict_reported = 0;
-
- /* debugging cruft *
- time_t tt;
- tt = icaltime_as_timet_with_zone(t1start, t1start.zone);
- syslog(LOG_DEBUG, "PROPOSED START: %s", ctime(&tt));
- tt = icaltime_as_timet_with_zone(t1end, t1end.zone);
- syslog(LOG_DEBUG, " PROPOSED END: %s", ctime(&tt));
- tt = icaltime_as_timet_with_zone(t2start, t2start.zone);
- syslog(LOG_DEBUG, "EXISTING START: %s", ctime(&tt));
- tt = icaltime_as_timet_with_zone(t2end, t2end.zone);
- syslog(LOG_DEBUG, " EXISTING END: %s", ctime(&tt));
- * debugging cruft */
-
- /* compare and output */
-
- if (ical_ctdl_is_overlap(t1start, t1end, t2start, t2end)) {
- cprintf("%ld||%s|%s|%d|\n",
- existing_msgnum,
- conflict_event_uid,
- conflict_event_summary,
- ( (!IsEmptyStr(compare_uid)
- &&(!strcasecmp(compare_uid,
- conflict_event_uid))) ? 1 : 0
- )
- );
- conflict_reported = 1;
- }
-
- return(conflict_reported);
-}
-
-
-/*
- * Phase 5 of "hunt for conflicts"
- * Called by ical_conflicts_phase4()
- *
- * We have the proposed event boiled down to start and end times.
- * Now check it against an existing event.
- */
-void ical_conflicts_phase5(struct icaltimetype t1start,
- struct icaltimetype t1end,
- icalcomponent *existing_event,
- long existing_msgnum,
- char *compare_uid)
-{
- char conflict_event_uid[SIZ];
- char conflict_event_summary[SIZ];
- struct icaltimetype t2start, t2end;
- icalproperty *p;
-
- /* recur variables */
- icalproperty *rrule = NULL;
- struct icalrecurrencetype recur;
- icalrecur_iterator *ritr = NULL;
- struct icaldurationtype dur;
- int num_recur = 0;
-
- /* initialization */
- strcpy(conflict_event_uid, "");
- strcpy(conflict_event_summary, "");
- t2start = icaltime_null_time();
- t2end = icaltime_null_time();
-
- /* existing event stuff */
- p = ical_ctdl_get_subprop(existing_event, ICAL_DTSTART_PROPERTY);
- if (p == NULL) return;
- if (p != NULL) t2start = icalproperty_get_dtstart(p);
- if (icaltime_is_utc(t2start)) {
- t2start.zone = icaltimezone_get_utc_timezone();
- }
- else {
- t2start.zone = icalcomponent_get_timezone(existing_event,
- icalparameter_get_tzid(
- icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
- )
- );
- if (!t2start.zone) {
- t2start.zone = get_default_icaltimezone();
- }
- }
-
- p = ical_ctdl_get_subprop(existing_event, ICAL_DTEND_PROPERTY);
- if (p != NULL) {
- t2end = icalproperty_get_dtend(p);
-
- if (icaltime_is_utc(t2end)) {
- t2end.zone = icaltimezone_get_utc_timezone();
- }
- else {
- t2end.zone = icalcomponent_get_timezone(existing_event,
- icalparameter_get_tzid(
- icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
- )
- );
- if (!t2end.zone) {
- t2end.zone = get_default_icaltimezone();
- }
- }
- dur = icaltime_subtract(t2end, t2start);
- }
- else {
- memset (&dur, 0, sizeof(struct icaldurationtype));
- }
-
- rrule = ical_ctdl_get_subprop(existing_event, ICAL_RRULE_PROPERTY);
- if (rrule) {
- recur = icalproperty_get_rrule(rrule);
- ritr = icalrecur_iterator_new(recur, t2start);
- }
-
- do {
- p = ical_ctdl_get_subprop(existing_event, ICAL_UID_PROPERTY);
- if (p != NULL) {
- strcpy(conflict_event_uid, icalproperty_get_comment(p));
- }
-
- p = ical_ctdl_get_subprop(existing_event, ICAL_SUMMARY_PROPERTY);
- if (p != NULL) {
- strcpy(conflict_event_summary, icalproperty_get_comment(p));
- }
-
- if (ical_conflicts_phase6(t1start, t1end, t2start, t2end,
- existing_msgnum, conflict_event_uid, conflict_event_summary, compare_uid))
- {
- num_recur = MAX_RECUR + 1; /* force it out of scope, no need to continue */
- }
-
- if (rrule) {
- t2start = icalrecur_iterator_next(ritr);
- if (!icaltime_is_null_time(t2end)) {
- const icaltimezone *hold_zone = t2end.zone;
- t2end = icaltime_add(t2start, dur);
- t2end.zone = hold_zone;
- }
- ++num_recur;
- }
-
- if (icaltime_compare(t2start, t1end) < 0) {
- num_recur = MAX_RECUR + 1; /* force it out of scope */
- }
-
- } while ( (rrule) && (!icaltime_is_null_time(t2start)) && (num_recur < MAX_RECUR) );
- icalrecur_iterator_free(ritr);
-}
-
-
-/*
- * Phase 4 of "hunt for conflicts"
- * Called by ical_hunt_for_conflicts_backend()
- *
- * At this point we've got it boiled down to two icalcomponent events in memory.
- * If they conflict, output something to the client.
- */
-void ical_conflicts_phase4(icalcomponent *proposed_event,
- icalcomponent *existing_event,
- long existing_msgnum)
-{
- struct icaltimetype t1start, t1end;
- icalproperty *p;
- char compare_uid[SIZ];
-
- /* recur variables */
- icalproperty *rrule = NULL;
- struct icalrecurrencetype recur;
- icalrecur_iterator *ritr = NULL;
- struct icaldurationtype dur;
- int num_recur = 0;
-
- /* initialization */
- t1end = icaltime_null_time();
- *compare_uid = '\0';
-
- /* proposed event stuff */
-
- p = ical_ctdl_get_subprop(proposed_event, ICAL_DTSTART_PROPERTY);
- if (p == NULL)
- return;
- else
- t1start = icalproperty_get_dtstart(p);
-
- if (icaltime_is_utc(t1start)) {
- t1start.zone = icaltimezone_get_utc_timezone();
- }
- else {
- t1start.zone = icalcomponent_get_timezone(proposed_event,
- icalparameter_get_tzid(
- icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
- )
- );
- if (!t1start.zone) {
- t1start.zone = get_default_icaltimezone();
- }
- }
-
- p = ical_ctdl_get_subprop(proposed_event, ICAL_DTEND_PROPERTY);
- if (p != NULL) {
- t1end = icalproperty_get_dtend(p);
-
- if (icaltime_is_utc(t1end)) {
- t1end.zone = icaltimezone_get_utc_timezone();
- }
- else {
- t1end.zone = icalcomponent_get_timezone(proposed_event,
- icalparameter_get_tzid(
- icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
- )
- );
- if (!t1end.zone) {
- t1end.zone = get_default_icaltimezone();
- }
- }
-
- dur = icaltime_subtract(t1end, t1start);
- }
- else {
- memset (&dur, 0, sizeof(struct icaldurationtype));
- }
-
- rrule = ical_ctdl_get_subprop(proposed_event, ICAL_RRULE_PROPERTY);
- if (rrule) {
- recur = icalproperty_get_rrule(rrule);
- ritr = icalrecur_iterator_new(recur, t1start);
- }
-
- p = ical_ctdl_get_subprop(proposed_event, ICAL_UID_PROPERTY);
- if (p != NULL) {
- strcpy(compare_uid, icalproperty_get_comment(p));
- }
-
- do {
- ical_conflicts_phase5(t1start, t1end, existing_event, existing_msgnum, compare_uid);
-
- if (rrule) {
- t1start = icalrecur_iterator_next(ritr);
- if (!icaltime_is_null_time(t1end)) {
- const icaltimezone *hold_zone = t1end.zone;
- t1end = icaltime_add(t1start, dur);
- t1end.zone = hold_zone;
- }
- ++num_recur;
- }
-
- } while ( (rrule) && (!icaltime_is_null_time(t1start)) && (num_recur < MAX_RECUR) );
- icalrecur_iterator_free(ritr);
-}
-
-
-/*
- * Phase 3 of "hunt for conflicts"
- * Called by ical_hunt_for_conflicts()
- */
-void ical_hunt_for_conflicts_backend(long msgnum, void *data) {
- icalcomponent *proposed_event;
- struct CtdlMessage *msg = NULL;
- struct ical_respond_data ird;
-
- proposed_event = (icalcomponent *)data;
-
- msg = CtdlFetchMessage(msgnum, 1);
- if (msg == NULL) return;
- memset(&ird, 0, sizeof ird);
- strcpy(ird.desired_partnum, "_HUNT_");
- mime_parser(CM_RANGE(msg, eMesageText),
- *ical_locate_part, /* callback function */
- NULL, NULL,
- (void *) &ird, /* user data */
- 0
- );
- CM_Free(msg);
-
- if (ird.cal == NULL) return;
-
- ical_conflicts_phase4(proposed_event, ird.cal, msgnum);
- icalcomponent_free(ird.cal);
-}
-
-
-/*
- * Phase 2 of "hunt for conflicts" operation.
- * At this point we have a calendar object which represents the VEVENT that
- * is proposed for addition to the calendar. Now hunt through the user's
- * calendar room, and output zero or more existing VEVENTs which conflict
- * with this one.
- */
-void ical_hunt_for_conflicts(icalcomponent *cal) {
- char hold_rm[ROOMNAMELEN];
-
- strcpy(hold_rm, CC->room.QRname); /* save current room */
-
- if (CtdlGetRoom(&CC->room, USERCALENDARROOM) != 0) {
- CtdlGetRoom(&CC->room, hold_rm);
- cprintf("%d You do not have a calendar.\n", ERROR + ROOM_NOT_FOUND);
- return;
- }
-
- cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
-
- CtdlForEachMessage(MSGS_ALL, 0, NULL,
- NULL,
- NULL,
- ical_hunt_for_conflicts_backend,
- (void *) cal
- );
-
- cprintf("000\n");
- CtdlGetRoom(&CC->room, hold_rm); /* return to saved room */
-
-}
-
-
-/*
- * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
- */
-void ical_conflicts(long msgnum, char *partnum) {
- struct CtdlMessage *msg = NULL;
- struct ical_respond_data ird;
-
- msg = CtdlFetchMessage(msgnum, 1);
- if (msg == NULL) {
- cprintf("%d Message %ld not found\n",
- ERROR + ILLEGAL_VALUE,
- (long)msgnum
- );
- return;
- }
-
- memset(&ird, 0, sizeof ird);
- strcpy(ird.desired_partnum, partnum);
- mime_parser(CM_RANGE(msg, eMesageText),
- *ical_locate_part, /* callback function */
- NULL, NULL,
- (void *) &ird, /* user data */
- 0
- );
-
- CM_Free(msg);
-
- if (ird.cal != NULL) {
- ical_hunt_for_conflicts(ird.cal);
- icalcomponent_free(ird.cal);
- return;
- }
-
- cprintf("%d No calendar object found\n", ERROR + ROOM_NOT_FOUND);
-}
-
-
-/*
- * Look for busy time in a VEVENT and add it to the supplied VFREEBUSY.
- *
- * fb The VFREEBUSY component to which we are appending
- * top_level_cal The top-level VCALENDAR component which contains a VEVENT to be added
- */
-void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
- icalcomponent *cal;
- icalproperty *p;
- icalvalue *v;
- struct icalperiodtype this_event_period = icalperiodtype_null_period();
- icaltimetype dtstart;
- icaltimetype dtend;
-
- /* recur variables */
- icalproperty *rrule = NULL;
- struct icalrecurrencetype recur;
- icalrecur_iterator *ritr = NULL;
- struct icaldurationtype dur;
- int num_recur = 0;
-
- if (!top_level_cal) return;
-
- /* Find the VEVENT component containing an event */
- cal = icalcomponent_get_first_component(top_level_cal, ICAL_VEVENT_COMPONENT);
- if (!cal) return;
-
- /* If this event is not opaque, the user isn't publishing it as
- * busy time, so don't bother doing anything else.
- */
- p = icalcomponent_get_first_property(cal, ICAL_TRANSP_PROPERTY);
- if (p != NULL) {
- v = icalproperty_get_value(p);
- if (v != NULL) {
- if (icalvalue_get_transp(v) != ICAL_TRANSP_OPAQUE) {
- return;
- }
- }
- }
-
- /*
- * Now begin calculating the event start and end times.
- */
- p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
- if (!p) return;
- dtstart = icalproperty_get_dtstart(p);
-
- if (icaltime_is_utc(dtstart)) {
- dtstart.zone = icaltimezone_get_utc_timezone();
- }
- else {
- dtstart.zone = icalcomponent_get_timezone(top_level_cal,
- icalparameter_get_tzid(
- icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
- )
- );
- if (!dtstart.zone) {
- dtstart.zone = get_default_icaltimezone();
- }
- }
-
- dtend = icalcomponent_get_dtend(cal);
- if (!icaltime_is_null_time(dtend)) {
- dur = icaltime_subtract(dtend, dtstart);
- }
- else {
- memset (&dur, 0, sizeof(struct icaldurationtype));
- }
-
- /* Is a recurrence specified? If so, get ready to process it... */
- rrule = ical_ctdl_get_subprop(cal, ICAL_RRULE_PROPERTY);
- if (rrule) {
- recur = icalproperty_get_rrule(rrule);
- ritr = icalrecur_iterator_new(recur, dtstart);
- }
-
- do {
- /* Convert the DTSTART and DTEND properties to an icalperiod. */
- this_event_period.start = dtstart;
-
- if (!icaltime_is_null_time(dtend)) {
- this_event_period.end = dtend;
- }
-
- /* Convert the timestamps to UTC. It's ok to do this because we've already expanded
- * recurrences and this data is never going to get used again.
- */
- this_event_period.start = icaltime_convert_to_zone(
- this_event_period.start,
- icaltimezone_get_utc_timezone()
- );
- this_event_period.end = icaltime_convert_to_zone(
- this_event_period.end,
- icaltimezone_get_utc_timezone()
- );
-
- /* Now add it. */
- icalcomponent_add_property(fb, icalproperty_new_freebusy(this_event_period));
-
- /* Make sure the DTSTART property of the freebusy *list* is set to
- * the DTSTART property of the *earliest event*.
- */
- p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
- if (p == NULL) {
- icalcomponent_set_dtstart(fb, this_event_period.start);
- }
- else {
- if (icaltime_compare(this_event_period.start, icalcomponent_get_dtstart(fb)) < 0) {
- icalcomponent_set_dtstart(fb, this_event_period.start);
- }
- }
-
- /* Make sure the DTEND property of the freebusy *list* is set to
- * the DTEND property of the *latest event*.
- */
- p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
- if (p == NULL) {
- icalcomponent_set_dtend(fb, this_event_period.end);
- }
- else {
- if (icaltime_compare(this_event_period.end, icalcomponent_get_dtend(fb)) > 0) {
- icalcomponent_set_dtend(fb, this_event_period.end);
- }
- }
-
- if (rrule) {
- dtstart = icalrecur_iterator_next(ritr);
- if (!icaltime_is_null_time(dtend)) {
- dtend = icaltime_add(dtstart, dur);
- dtend.zone = dtstart.zone;
- }
- ++num_recur;
- }
-
- } while ( (rrule) && (!icaltime_is_null_time(dtstart)) && (num_recur < MAX_RECUR) ) ;
- icalrecur_iterator_free(ritr);
-}
-
-
-/*
- * Backend for ical_freebusy()
- *
- * This function simply loads the messages in the user's calendar room,
- * which contain VEVENTs, then strips them of all non-freebusy data, and
- * adds them to the supplied VCALENDAR.
- *
- */
-void ical_freebusy_backend(long msgnum, void *data) {
- icalcomponent *fb;
- struct CtdlMessage *msg = NULL;
- struct ical_respond_data ird;
-
- fb = (icalcomponent *)data; /* User-supplied data will be the VFREEBUSY component */
-
- msg = CtdlFetchMessage(msgnum, 1);
- if (msg == NULL) return;
- memset(&ird, 0, sizeof ird);
- strcpy(ird.desired_partnum, "_HUNT_");
- mime_parser(CM_RANGE(msg, eMesageText),
- *ical_locate_part, /* callback function */
- NULL, NULL,
- (void *) &ird, /* user data */
- 0
- );
- CM_Free(msg);
-
- if (ird.cal) {
- ical_add_to_freebusy(fb, ird.cal); /* Add VEVENT times to VFREEBUSY */
- icalcomponent_free(ird.cal);
- }
-}
-
-
-/*
- * Grab another user's free/busy times
- */
-void ical_freebusy(char *who) {
- struct ctdluser usbuf;
- char calendar_room_name[ROOMNAMELEN];
- char hold_rm[ROOMNAMELEN];
- char *serialized_request = NULL;
- icalcomponent *encaps = NULL;
- icalcomponent *fb = NULL;
- int found_user = (-1);
- struct recptypes *recp = NULL;
- char buf[256];
- char host[256];
- char type[256];
- int i = 0;
- int config_lines = 0;
-
- /* First try an exact match. */
- found_user = CtdlGetUser(&usbuf, who);
-
- /* If not found, try it as an unqualified email address. */
- if (found_user != 0) {
- strcpy(buf, who);
- recp = validate_recipients(buf, NULL, 0);
- syslog(LOG_DEBUG, "calendar: trying <%s>", buf);
- if (recp != NULL) {
- if (recp->num_local == 1) {
- found_user = CtdlGetUser(&usbuf, recp->recp_local);
- }
- free_recipients(recp);
- }
- }
-
- /* If still not found, try it as an address qualified with the
- * primary FQDN of this Citadel node.
- */
- if (found_user != 0) {
- snprintf(buf, sizeof buf, "%s@%s", who, CtdlGetConfigStr("c_fqdn"));
- syslog(LOG_DEBUG, "calendar: trying <%s>", buf);
- recp = validate_recipients(buf, NULL, 0);
- if (recp != NULL) {
- if (recp->num_local == 1) {
- found_user = CtdlGetUser(&usbuf, recp->recp_local);
- }
- free_recipients(recp);
- }
- }
-
- /* Still not found? Try qualifying it with every domain we
- * might have addresses in.
- */
- if (found_user != 0) {
- config_lines = num_tokens(inetcfg, '\n');
- for (i=0; ((i < config_lines) && (found_user != 0)); ++i) {
- extract_token(buf, inetcfg, i, '\n', sizeof buf);
- extract_token(host, buf, 0, '|', sizeof host);
- extract_token(type, buf, 1, '|', sizeof type);
-
- if ( (!strcasecmp(type, "localhost"))
- || (!strcasecmp(type, "directory")) ) {
- snprintf(buf, sizeof buf, "%s@%s", who, host);
- syslog(LOG_DEBUG, "calendar: trying <%s>", buf);
- recp = validate_recipients(buf, NULL, 0);
- if (recp != NULL) {
- if (recp->num_local == 1) {
- found_user = CtdlGetUser(&usbuf, recp->recp_local);
- }
- free_recipients(recp);
- }
- }
- }
- }
-
- if (found_user != 0) {
- cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
- return;
- }
-
- CtdlMailboxName(calendar_room_name, sizeof calendar_room_name,
- &usbuf, USERCALENDARROOM);
-
- strcpy(hold_rm, CC->room.QRname); /* save current room */
-
- if (CtdlGetRoom(&CC->room, calendar_room_name) != 0) {
- cprintf("%d Cannot open calendar\n", ERROR + ROOM_NOT_FOUND);
- CtdlGetRoom(&CC->room, hold_rm);
- return;
- }
-
- /* Create a VFREEBUSY subcomponent */
- syslog(LOG_DEBUG, "calendar: creating VFREEBUSY component");
- fb = icalcomponent_new_vfreebusy();
- if (fb == NULL) {
- cprintf("%d Internal error: cannot allocate memory.\n", ERROR + INTERNAL_ERROR);
- CtdlGetRoom(&CC->room, hold_rm);
- return;
- }
-
- /* Set the method to PUBLISH */
- icalcomponent_set_method(fb, ICAL_METHOD_PUBLISH);
-
- /* Set the DTSTAMP to right now. */
- icalcomponent_set_dtstamp(fb, icaltime_from_timet_with_zone(time(NULL), 0, icaltimezone_get_utc_timezone()));
-
- /* Add the user's email address as ORGANIZER */
- sprintf(buf, "MAILTO:%s", who);
- if (strchr(buf, '@') == NULL) {
- strcat(buf, "@");
- strcat(buf, CtdlGetConfigStr("c_fqdn"));
- }
- for (i=0; buf[i]; ++i) {
- if (buf[i]==' ') buf[i] = '_';
- }
- icalcomponent_add_property(fb, icalproperty_new_organizer(buf));
-
- /* Add busy time from events */
- syslog(LOG_DEBUG, "calendar: adding busy time from events");
- CtdlForEachMessage(MSGS_ALL, 0, NULL, NULL, NULL, ical_freebusy_backend, (void *)fb );
-
- /* If values for DTSTART and DTEND are still not present, set them
- * to yesterday and tomorrow as default values.
- */
- if (icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY) == NULL) {
- icalcomponent_set_dtstart(fb, icaltime_from_timet_with_zone(time(NULL)-86400L, 0, icaltimezone_get_utc_timezone()));
- }
- if (icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY) == NULL) {
- icalcomponent_set_dtend(fb, icaltime_from_timet_with_zone(time(NULL)+86400L, 0, icaltimezone_get_utc_timezone()));
- }
-
- /* Put the freebusy component into the calendar component */
- syslog(LOG_DEBUG, "calendar: encapsulating");
- encaps = ical_encapsulate_subcomponent(fb);
- if (encaps == NULL) {
- icalcomponent_free(fb);
- cprintf("%d Internal error: cannot allocate memory.\n",
- ERROR + INTERNAL_ERROR);
- CtdlGetRoom(&CC->room, hold_rm);
- return;
- }
-
- /* Set the method to PUBLISH */
- syslog(LOG_DEBUG, "calendar: setting method");
- icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
-
- /* Serialize it */
- syslog(LOG_DEBUG, "calendar: serializing");
- serialized_request = icalcomponent_as_ical_string_r(encaps);
- icalcomponent_free(encaps); /* Don't need this anymore. */
-
- cprintf("%d Free/busy for %s\n", LISTING_FOLLOWS, usbuf.fullname);
- if (serialized_request != NULL) {
- client_write(serialized_request, strlen(serialized_request));
- free(serialized_request);
- }
- cprintf("\n000\n");
-
- /* Go back to the room from which we came... */
- CtdlGetRoom(&CC->room, hold_rm);
-}
-
-
-/*
- * Backend for ical_getics()
- *
- * This is a ForEachMessage() callback function that searches the current room
- * for calendar events and adds them each into one big calendar component.
- */
-void ical_getics_backend(long msgnum, void *data) {
- icalcomponent *encaps, *c;
- struct CtdlMessage *msg = NULL;
- struct ical_respond_data ird;
-
- encaps = (icalcomponent *)data;
- if (encaps == NULL) return;
-
- /* Look for the calendar event... */
-
- msg = CtdlFetchMessage(msgnum, 1);
- if (msg == NULL) return;
- memset(&ird, 0, sizeof ird);
- strcpy(ird.desired_partnum, "_HUNT_");
- mime_parser(CM_RANGE(msg, eMesageText),
- *ical_locate_part, /* callback function */
- NULL, NULL,
- (void *) &ird, /* user data */
- 0
- );
- CM_Free(msg);
-
- if (ird.cal == NULL) return;
-
- /* Here we go: put the VEVENT into the VCALENDAR. We now no longer
- * are responsible for "the_request"'s memory -- it will be freed
- * when we free "encaps".
- */
-
- /* If the top-level component is *not* a VCALENDAR, we can drop it right
- * in. This will almost never happen.
- */
- if (icalcomponent_isa(ird.cal) != ICAL_VCALENDAR_COMPONENT) {
- icalcomponent_add_component(encaps, ird.cal);
- }
- /*
- * In the more likely event that we're looking at a VCALENDAR with the VEVENT
- * and other components encapsulated inside, we have to extract them.
- */
- else {
- for (c = icalcomponent_get_first_component(ird.cal, ICAL_ANY_COMPONENT);
- (c != NULL);
- c = icalcomponent_get_next_component(ird.cal, ICAL_ANY_COMPONENT)) {
-
- /* For VTIMEZONE components, suppress duplicates of the same tzid */
-
- if (icalcomponent_isa(c) == ICAL_VTIMEZONE_COMPONENT) {
- icalproperty *p = icalcomponent_get_first_property(c, ICAL_TZID_PROPERTY);
- if (p) {
- const char *tzid = icalproperty_get_tzid(p);
- if (!icalcomponent_get_timezone(encaps, tzid)) {
- icalcomponent_add_component(encaps,
- icalcomponent_new_clone(c));
- }
- }
- }
-
- /* All other types of components can go in verbatim */
- else {
- icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
- }
- }
- icalcomponent_free(ird.cal);
- }
-}
-
-
-/*
- * Retrieve all of the calendar items in the current room, and output them
- * as a single icalendar object.
- */
-void ical_getics(void)
-{
- icalcomponent *encaps = NULL;
- char *ser = NULL;
-
- if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
- &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
- cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
- return; /* Not an iCalendar-centric room */
- }
-
- encaps = icalcomponent_new_vcalendar();
- if (encaps == NULL) {
- syslog(LOG_ERR, "calendar: could not allocate component!");
- cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
- return;
- }
-
- cprintf("%d one big calendar\n", LISTING_FOLLOWS);
-
- /* Set the Product ID */
- icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
-
- /* Set the Version Number */
- icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
-
- /* Set the method to PUBLISH */
- icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
-
- /* Now go through the room encapsulating all calendar items. */
- CtdlForEachMessage(MSGS_ALL, 0, NULL,
- NULL,
- NULL,
- ical_getics_backend,
- (void *) encaps
- );
-
- ser = icalcomponent_as_ical_string_r(encaps);
- icalcomponent_free(encaps); /* Don't need this anymore. */
- client_write(ser, strlen(ser));
- free(ser);
- cprintf("\n000\n");
-}
-
-
-/*
- * Helper callback function for ical_putics() to discover which TZID's we need.
- * Simply put the tzid name string into a hash table. After the callbacks are
- * done we'll go through them and attach the ones that we have.
- */
-void ical_putics_grabtzids(icalparameter *param, void *data)
-{
- const char *tzid = icalparameter_get_tzid(param);
- HashList *keys = (HashList *) data;
-
- if ( (keys) && (tzid) && (!IsEmptyStr(tzid)) ) {
- Put(keys, tzid, strlen(tzid), strdup(tzid), NULL);
- }
-}
-
-
-/*
- * Delete all of the calendar items in the current room, and replace them
- * with calendar items from a client-supplied data stream.
- */
-void ical_putics(void)
-{
- char *calstream = NULL;
- icalcomponent *cal;
- icalcomponent *c;
- icalcomponent *encaps = NULL;
- HashList *tzidlist = NULL;
- HashPos *HashPos;
- void *Value;
- const char *Key;
- long len;
-
- /* Only allow this operation if we're in a room containing a calendar or tasks view */
- if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
- &&(CC->room.QRdefaultview != VIEW_TASKS) ) {
- cprintf("%d Not a calendar room\n", ERROR+NOT_HERE);
- return;
- }
-
- /* Only allow this operation if we have permission to overwrite the existing calendar */
- if (!CtdlDoIHavePermissionToDeleteMessagesFromThisRoom()) {
- cprintf("%d Permission denied.\n", ERROR+HIGHER_ACCESS_REQUIRED);
- return;
- }
-
- cprintf("%d Transmit data now\n", SEND_LISTING);
- calstream = CtdlReadMessageBody(HKEY("000"), CtdlGetConfigLong("c_maxmsglen"), NULL, 0);
- if (calstream == NULL) {
- return;
- }
-
- cal = icalcomponent_new_from_string(calstream);
- free(calstream);
-
- /* We got our data stream -- now do something with it. */
-
- /* Delete the existing messages in the room, because we are overwriting
- * the entire calendar with an entire new (or updated) calendar.
- * (Careful: this opens an S_ROOMS critical section!)
- */
- CtdlDeleteMessages(CC->room.QRname, NULL, 0, "");
-
- /* If the top-level component is *not* a VCALENDAR, we can drop it right
- * in. This will almost never happen.
- */
- if (icalcomponent_isa(cal) != ICAL_VCALENDAR_COMPONENT) {
- ical_write_to_cal(NULL, cal);
- }
- /*
- * In the more likely event that we're looking at a VCALENDAR with the VEVENT
- * and other components encapsulated inside, we have to extract them.
- */
- else {
- for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
- (c != NULL);
- c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
-
- /* Non-VTIMEZONE components each get written as individual messages.
- * But we also need to attach the relevant VTIMEZONE components to them.
- */
- if ( (icalcomponent_isa(c) != ICAL_VTIMEZONE_COMPONENT)
- && (encaps = icalcomponent_new_vcalendar()) ) {
- icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
- icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
- icalcomponent_set_method(encaps, ICAL_METHOD_PUBLISH);
-
- /* Attach any needed timezones here */
- tzidlist = NewHash(1, NULL);
- if (tzidlist) {
- icalcomponent_foreach_tzid(c, ical_putics_grabtzids, tzidlist);
- }
- HashPos = GetNewHashPos(tzidlist, 0);
-
- while (GetNextHashPos(tzidlist, HashPos, &len, &Key, &Value)) {
- syslog(LOG_DEBUG, "calendar: attaching timezone '%s'", (char*) Value);
- icaltimezone *t = NULL;
-
- /* First look for a timezone attached to the original calendar */
- t = icalcomponent_get_timezone(cal, Value);
-
- /* Try built-in tzdata if the right one wasn't attached */
- if (!t) {
- t = icaltimezone_get_builtin_timezone(Value);
- }
-
- /* I've got a valid timezone to attach. */
- if (t) {
- icalcomponent_add_component(encaps,
- icalcomponent_new_clone(
- icaltimezone_get_component(t)
- )
- );
- }
-
- }
- DeleteHashPos(&HashPos);
- DeleteHash(&tzidlist);
-
- /* Now attach the component itself (usually a VEVENT or VTODO) */
- icalcomponent_add_component(encaps, icalcomponent_new_clone(c));
-
- /* Write it to the message store */
- ical_write_to_cal(NULL, encaps);
- icalcomponent_free(encaps);
- }
- }
- }
-
- icalcomponent_free(cal);
-}
-
-
-/*
- * All Citadel calendar commands from the client come through here.
- */
-void cmd_ical(char *argbuf)
-{
- char subcmd[64];
- long msgnum;
- char partnum[256];
- char action[256];
- char who[256];
-
- extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
-
- /* Allow "test" and "freebusy" subcommands without logging in. */
-
- if (!strcasecmp(subcmd, "test")) {
- cprintf("%d This server supports calendaring\n", CIT_OK);
- return;
- }
-
- if (!strcasecmp(subcmd, "freebusy")) {
- extract_token(who, argbuf, 1, '|', sizeof who);
- ical_freebusy(who);
- return;
- }
-
- if (!strcasecmp(subcmd, "sgi")) {
- CIT_ICAL->server_generated_invitations = (extract_int(argbuf, 1) ? 1 : 0) ;
- cprintf("%d %d\n", CIT_OK, CIT_ICAL->server_generated_invitations);
- return;
- }
-
- if (CtdlAccessCheck(ac_logged_in)) return;
-
- if (!strcasecmp(subcmd, "respond")) {
- msgnum = extract_long(argbuf, 1);
- extract_token(partnum, argbuf, 2, '|', sizeof partnum);
- extract_token(action, argbuf, 3, '|', sizeof action);
- ical_respond(msgnum, partnum, action);
- return;
- }
-
- if (!strcasecmp(subcmd, "handle_rsvp")) {
- msgnum = extract_long(argbuf, 1);
- extract_token(partnum, argbuf, 2, '|', sizeof partnum);
- extract_token(action, argbuf, 3, '|', sizeof action);
- ical_handle_rsvp(msgnum, partnum, action);
- return;
- }
-
- if (!strcasecmp(subcmd, "conflicts")) {
- msgnum = extract_long(argbuf, 1);
- extract_token(partnum, argbuf, 2, '|', sizeof partnum);
- ical_conflicts(msgnum, partnum);
- return;
- }
-
- if (!strcasecmp(subcmd, "getics")) {
- ical_getics();
- return;
- }
-
- if (!strcasecmp(subcmd, "putics")) {
- ical_putics();
- return;
- }
-
- cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
-}
-
-
-/*
- * We don't know if the calendar room exists so we just create it at login
- */
-void ical_CtdlCreateRoom(void)
-{
- struct ctdlroom qr;
- visit vbuf;
-
- /* Create the calendar room if it doesn't already exist */
- CtdlCreateRoom(USERCALENDARROOM, 4, "", 0, 1, 0, VIEW_CALENDAR);
-
- /* Set expiration policy to manual; otherwise objects will be lost! */
- if (CtdlGetRoomLock(&qr, USERCALENDARROOM)) {
- syslog(LOG_ERR, "calendar: couldn't get the user calendar room");
- return;
- }
- qr.QRep.expire_mode = EXPIRE_MANUAL;
- qr.QRdefaultview = VIEW_CALENDAR; /* 3 = calendar view */
- CtdlPutRoomLock(&qr);
-
- /* Set the view to a calendar view */
- CtdlGetRelationship(&vbuf, &CC->user, &qr);
- vbuf.v_view = VIEW_CALENDAR;
- CtdlSetRelationship(&vbuf, &CC->user, &qr);
-
- /* Create the tasks list room if it doesn't already exist */
- CtdlCreateRoom(USERTASKSROOM, 4, "", 0, 1, 0, VIEW_TASKS);
-
- /* Set expiration policy to manual; otherwise objects will be lost! */
- if (CtdlGetRoomLock(&qr, USERTASKSROOM)) {
- syslog(LOG_ERR, "calendar: couldn't get the user calendar room!");
- return;
- }
- qr.QRep.expire_mode = EXPIRE_MANUAL;
- qr.QRdefaultview = VIEW_TASKS;
- CtdlPutRoomLock(&qr);
-
- /* Set the view to a task list view */
- CtdlGetRelationship(&vbuf, &CC->user, &qr);
- vbuf.v_view = VIEW_TASKS;
- CtdlSetRelationship(&vbuf, &CC->user, &qr);
-
- /* Create the notes room if it doesn't already exist */
- CtdlCreateRoom(USERNOTESROOM, 4, "", 0, 1, 0, VIEW_NOTES);
-
- /* Set expiration policy to manual; otherwise objects will be lost! */
- if (CtdlGetRoomLock(&qr, USERNOTESROOM)) {
- syslog(LOG_ERR, "calendar: couldn't get the user calendar room!");
- return;
- }
- qr.QRep.expire_mode = EXPIRE_MANUAL;
- qr.QRdefaultview = VIEW_NOTES;
- CtdlPutRoomLock(&qr);
-
- /* Set the view to a notes view */
- CtdlGetRelationship(&vbuf, &CC->user, &qr);
- vbuf.v_view = VIEW_NOTES;
- CtdlSetRelationship(&vbuf, &CC->user, &qr);
-
- return;
-}
-
-
-/*
- * ical_send_out_invitations() is called by ical_saving_vevent() when it finds a VEVENT.
- *
- * top_level_cal is the highest available level calendar object.
- * cal is the subcomponent containing the VEVENT.
- *
- * Note: if you change the encapsulation code here, change it in WebCit's ical_encapsulate_subcomponent()
- */
-void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal) {
- icalcomponent *the_request = NULL;
- char *serialized_request = NULL;
- icalcomponent *encaps = NULL;
- char *request_message_text = NULL;
- struct CtdlMessage *msg = NULL;
- struct recptypes *valid = NULL;
- char attendees_string[SIZ];
- int num_attendees = 0;
- char this_attendee[256];
- icalproperty *attendee = NULL;
- char summary_string[SIZ];
- icalproperty *summary = NULL;
- size_t reqsize;
- icalproperty *p;
- struct icaltimetype t;
- const icaltimezone *attached_zones[5] = { NULL, NULL, NULL, NULL, NULL };
- int i;
- const icaltimezone *z;
- int num_zones_attached = 0;
- int zone_already_attached;
- icalparameter *tzidp = NULL;
- const char *tzidc = NULL;
-
- if (cal == NULL) {
- syslog(LOG_ERR, "calendar: trying to reply to NULL event?");
- return;
- }
-
- /* If this is a VCALENDAR component, look for a VEVENT subcomponent. */
- if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
- ical_send_out_invitations(top_level_cal,
- icalcomponent_get_first_component(
- cal, ICAL_VEVENT_COMPONENT
- )
- );
- return;
- }
-
- /* Clone the event */
- the_request = icalcomponent_new_clone(cal);
- if (the_request == NULL) {
- syslog(LOG_ERR, "calendar: cannot clone calendar object");
- return;
- }
-
- /* Extract the summary string -- we'll use it as the
- * message subject for the request
- */
- strcpy(summary_string, "Meeting request");
- summary = icalcomponent_get_first_property(the_request, ICAL_SUMMARY_PROPERTY);
- if (summary != NULL) {
- if (icalproperty_get_summary(summary)) {
- strcpy(summary_string,
- icalproperty_get_summary(summary) );
- }
- }
-
- /* Determine who the recipients of this message are (the attendees) */
- strcpy(attendees_string, "");
- for (attendee = icalcomponent_get_first_property(the_request, ICAL_ATTENDEE_PROPERTY); attendee != NULL; attendee = icalcomponent_get_next_property(the_request, ICAL_ATTENDEE_PROPERTY)) {
- const char *ch = icalproperty_get_attendee(attendee);
- if ((ch != NULL) && !strncasecmp(ch, "MAILTO:", 7)) {
- safestrncpy(this_attendee, ch + 7, sizeof(this_attendee));
-
- if (!CtdlIsMe(this_attendee, sizeof this_attendee)) { /* don't send an invitation to myself! */
- snprintf(&attendees_string[strlen(attendees_string)],
- sizeof(attendees_string) - strlen(attendees_string),
- "%s, ",
- this_attendee
- );
- ++num_attendees;
- }
- }
- }
-
- syslog(LOG_DEBUG, "calendar: <%d> attendees: <%s>", num_attendees, attendees_string);
-
- /* If there are no attendees, there are no invitations to send, so...
- * don't bother putting one together! Punch out, Maverick!
- */
- if (num_attendees == 0) {
- icalcomponent_free(the_request);
- return;
- }
-
- /* Encapsulate the VEVENT component into a complete VCALENDAR */
- encaps = icalcomponent_new_vcalendar();
- if (encaps == NULL) {
- syslog(LOG_ERR, "calendar: could not allocate component!");
- icalcomponent_free(the_request);
- return;
- }
-
- /* Set the Product ID */
- icalcomponent_add_property(encaps, icalproperty_new_prodid(PRODID));
-
- /* Set the Version Number */
- icalcomponent_add_property(encaps, icalproperty_new_version("2.0"));
-
- /* Set the method to REQUEST */
- icalcomponent_set_method(encaps, ICAL_METHOD_REQUEST);
-
- /* Look for properties containing timezone parameters, to see if we need to attach VTIMEZONEs */
- for (p = icalcomponent_get_first_property(the_request, ICAL_ANY_PROPERTY);
- p != NULL;
- p = icalcomponent_get_next_property(the_request, ICAL_ANY_PROPERTY))
- {
- if ( (icalproperty_isa(p) == ICAL_COMPLETED_PROPERTY)
- || (icalproperty_isa(p) == ICAL_CREATED_PROPERTY)
- || (icalproperty_isa(p) == ICAL_DATEMAX_PROPERTY)
- || (icalproperty_isa(p) == ICAL_DATEMIN_PROPERTY)
- || (icalproperty_isa(p) == ICAL_DTEND_PROPERTY)
- || (icalproperty_isa(p) == ICAL_DTSTAMP_PROPERTY)
- || (icalproperty_isa(p) == ICAL_DTSTART_PROPERTY)
- || (icalproperty_isa(p) == ICAL_DUE_PROPERTY)
- || (icalproperty_isa(p) == ICAL_EXDATE_PROPERTY)
- || (icalproperty_isa(p) == ICAL_LASTMODIFIED_PROPERTY)
- || (icalproperty_isa(p) == ICAL_MAXDATE_PROPERTY)
- || (icalproperty_isa(p) == ICAL_MINDATE_PROPERTY)
- || (icalproperty_isa(p) == ICAL_RECURRENCEID_PROPERTY)
- ) {
- t = icalproperty_get_dtstart(p); // it's safe to use dtstart for all of them
-
- /* Determine the tzid in order for some of the conditions below to work */
- tzidp = icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER);
- if (tzidp) {
- tzidc = icalparameter_get_tzid(tzidp);
- }
- else {
- tzidc = NULL;
- }
-
- /* First see if there's a timezone attached to the data structure itself */
- if (icaltime_is_utc(t)) {
- z = icaltimezone_get_utc_timezone();
- }
- else {
- z = icaltime_get_timezone(t);
- }
-
- /* If not, try to determine the tzid from the parameter using attached zones */
- if ((!z) && (tzidc)) {
- z = icalcomponent_get_timezone(top_level_cal, tzidc);
- }
-
- /* Still no good? Try our internal database */
- if ((!z) && (tzidc)) {
- z = icaltimezone_get_builtin_timezone_from_tzid(tzidc);
- }
-
- if (z) {
- /* We have a valid timezone. Good. Now we need to attach it. */
-
- zone_already_attached = 0;
- for (i=0; i<5; ++i) {
- if (z == attached_zones[i]) {
- /* We've already got this one, no need to attach another. */
- ++zone_already_attached;
- }
- }
- if ((!zone_already_attached) && (num_zones_attached < 5)) {
- /* This is a new one, so attach it. */
- attached_zones[num_zones_attached++] = z;
- }
-
- icalproperty_set_parameter(p, icalparameter_new_tzid(icaltimezone_get_tzid(z))
- );
- }
- }
- }
-
- /* Encapsulate any timezones we need */
- if (num_zones_attached > 0) for (i=0; i<num_zones_attached; ++i) {
- icalcomponent *zc;
- zc = icalcomponent_new_clone(icaltimezone_get_component(attached_zones[i]));
- icalcomponent_add_component(encaps, zc);
- }
-
- /* Here we go: encapsulate the VEVENT into the VCALENDAR. We now no longer
- * are responsible for "the_request"'s memory -- it will be freed
- * when we free "encaps".
- */
- icalcomponent_add_component(encaps, the_request);
-
- /* Serialize it */
- serialized_request = icalcomponent_as_ical_string_r(encaps);
- icalcomponent_free(encaps); /* Don't need this anymore. */
- if (serialized_request == NULL) return;
-
- reqsize = strlen(serialized_request) + SIZ;
- request_message_text = malloc(reqsize);
- if (request_message_text != NULL) {
- snprintf(request_message_text, reqsize,
- "Content-type: text/calendar\r\n\r\n%s\r\n",
- serialized_request
- );
-
- msg = CtdlMakeMessage(
- &CC->user,
- NULL, /* No single recipient here */
- NULL, /* No single recipient here */
- CC->room.QRname,
- 0,
- FMT_RFC822,
- NULL,
- NULL,
- summary_string, /* Use summary for subject */
- NULL,
- request_message_text,
- NULL
- );
-
- if (msg != NULL) {
- valid = validate_recipients(attendees_string, NULL, 0);
- CtdlSubmitMsg(msg, valid, "");
- CM_Free(msg);
- free_recipients(valid);
- }
- }
- free(serialized_request);
-}
-
-
-/*
- * When a calendar object is being saved, determine whether it's a VEVENT
- * and the user saving it is the organizer. If so, send out invitations
- * to any listed attendees.
- *
- * This function is recursive. The caller can simply supply the same object
- * as both arguments. When it recurses it will alter the second argument
- * while holding on to the top level object. This allows us to go back and
- * grab things like time zones which might be attached.
- *
- */
-void ical_saving_vevent(icalcomponent *top_level_cal, icalcomponent *cal) {
- icalcomponent *c;
- icalproperty *organizer = NULL;
- char organizer_string[SIZ];
-
- syslog(LOG_DEBUG, "calendar: ical_saving_vevent() has been called");
-
- /* Don't send out invitations unless the client wants us to. */
- if (CIT_ICAL->server_generated_invitations == 0) {
- return;
- }
-
- /* Don't send out invitations if we've been asked not to. */
- if (CIT_ICAL->avoid_sending_invitations > 0) {
- return;
- }
-
- strcpy(organizer_string, "");
- /*
- * The VEVENT subcomponent is the one we're interested in.
- * Send out invitations if, and only if, this user is the Organizer.
- */
- if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
- organizer = icalcomponent_get_first_property(cal, ICAL_ORGANIZER_PROPERTY);
- if (organizer != NULL) {
- if (icalproperty_get_organizer(organizer)) {
- strcpy(organizer_string,
- icalproperty_get_organizer(organizer));
- }
- }
- if (!strncasecmp(organizer_string, "MAILTO:", 7)) {
- strcpy(organizer_string, &organizer_string[7]);
- striplt(organizer_string);
- /*
- * If the user saving the event is listed as the
- * organizer, then send out invitations.
- */
- if (CtdlIsMe(organizer_string, sizeof organizer_string)) {
- ical_send_out_invitations(top_level_cal, cal);
- }
- }
- }
-
- /* If the component has subcomponents, recurse through them. */
- for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
- (c != NULL);
- c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
- /* Recursively process subcomponent */
- ical_saving_vevent(top_level_cal, c);
- }
-
-}
-
-
-/*
- * Back end for ical_obj_beforesave()
- * This hunts for the UID of the calendar event (becomes Citadel msg EUID),
- * the summary of the event (becomes message subject),
- * and the start time (becomes message date/time).
- */
-void ical_obj_beforesave_backend(char *name, char *filename, char *partnum,
- char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
- char *encoding, char *cbid, void *cbuserdata)
-{
- const char* pch;
- icalcomponent *cal, *nested_event, *nested_todo, *whole_cal;
- icalproperty *p;
- char new_uid[256] = "";
- struct CtdlMessage *msg = (struct CtdlMessage *) cbuserdata;
-
- if (!msg) return;
-
- /* We're only interested in calendar data. */
- if ( (strcasecmp(cbtype, "text/calendar"))
- && (strcasecmp(cbtype, "application/ics")) ) {
- return;
- }
-
- /* Hunt for the UID and drop it in
- * the "user data" pointer for the MIME parser. When
- * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
- * to that string.
- */
- whole_cal = icalcomponent_new_from_string(content);
- cal = whole_cal;
- if (cal != NULL) {
- if (icalcomponent_isa(cal) == ICAL_VCALENDAR_COMPONENT) {
- nested_event = icalcomponent_get_first_component(
- cal, ICAL_VEVENT_COMPONENT);
- if (nested_event != NULL) {
- cal = nested_event;
- }
- else {
- nested_todo = icalcomponent_get_first_component(
- cal, ICAL_VTODO_COMPONENT);
- if (nested_todo != NULL) {
- cal = nested_todo;
- }
- }
- }
-
- if (cal != NULL) {
-
- /* Set the message EUID to the iCalendar UID */
-
- p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
- if (p == NULL) {
- /* If there's no uid we must generate one */
- generate_uuid(new_uid);
- icalcomponent_add_property(cal, icalproperty_new_uid(new_uid));
- p = ical_ctdl_get_subprop(cal, ICAL_UID_PROPERTY);
- }
- if (p != NULL) {
- pch = icalproperty_get_comment(p);
- if (!IsEmptyStr(pch)) {
- CM_SetField(msg, eExclusiveID, pch, strlen(pch));
- syslog(LOG_DEBUG, "calendar: saving calendar UID <%s>", pch);
- }
- }
-
- /* Set the message subject to the iCalendar summary */
-
- p = ical_ctdl_get_subprop(cal, ICAL_SUMMARY_PROPERTY);
- if (p != NULL) {
- pch = icalproperty_get_comment(p);
- if (!IsEmptyStr(pch)) {
- char *subj;
-
- subj = rfc2047encode(pch, strlen(pch));
- CM_SetAsField(msg, eMsgSubject, &subj, strlen(subj));
- }
- }
-
- /* Set the message date/time to the iCalendar start time */
-
- p = ical_ctdl_get_subprop(cal, ICAL_DTSTART_PROPERTY);
- if (p != NULL) {
- time_t idtstart;
- idtstart = icaltime_as_timet(icalproperty_get_dtstart(p));
- if (idtstart > 0) {
- CM_SetFieldLONG(msg, eTimestamp, idtstart);
- }
- }
-
- }
- icalcomponent_free(cal);
- if (whole_cal != cal) {
- icalcomponent_free(whole_cal);
- }
- }
-}
-
-
-/*
- * See if we need to prevent the object from being saved (we don't allow
- * MIME types other than text/calendar in "calendar" or "tasks" rooms).
- *
- * If the message is being saved, we also set various message header fields
- * using data found in the iCalendar object.
- */
-int ical_obj_beforesave(struct CtdlMessage *msg, struct recptypes *recp)
-{
- /* First determine if this is a calendar or tasks room */
- if ( (CC->room.QRdefaultview != VIEW_CALENDAR)
- && (CC->room.QRdefaultview != VIEW_TASKS)
- ) {
- return(0); /* Not an iCalendar-centric room */
- }
-
- /* It must be an RFC822 message! */
- if (msg->cm_format_type != 4) {
- syslog(LOG_DEBUG, "calendar: rejecting non-RFC822 message");
- return(1); /* You tried to save a non-RFC822 message! */
- }
-
- if (CM_IsEmpty(msg, eMesageText)) {
- return(1); /* You tried to save a null message! */
- }
-
- /* Do all of our lovely back-end parsing */
- mime_parser(CM_RANGE(msg, eMesageText),
- *ical_obj_beforesave_backend,
- NULL, NULL,
- (void *)msg,
- 0
- );
-
- return(0);
-}
-
-
-/*
- * Things we need to do after saving a calendar event.
- */
-void ical_obj_aftersave_backend(char *name, char *filename, char *partnum,
- char *disp, void *content, char *cbtype, char *cbcharset, size_t length,
- char *encoding, char *cbid, void *cbuserdata)
-{
- icalcomponent *cal;
-
- /* We're only interested in calendar items here. */
- if ( (strcasecmp(cbtype, "text/calendar"))
- && (strcasecmp(cbtype, "application/ics")) ) {
- return;
- }
-
- /* Hunt for the UID and drop it in
- * the "user data" pointer for the MIME parser. When
- * ical_obj_beforesave() sees it there, it'll set the Exclusive msgid
- * to that string.
- */
- if ( (!strcasecmp(cbtype, "text/calendar"))
- || (!strcasecmp(cbtype, "application/ics")) ) {
- cal = icalcomponent_new_from_string(content);
- if (cal != NULL) {
- ical_saving_vevent(cal, cal);
- icalcomponent_free(cal);
- }
- }
-}
-
-
-/*
- * Things we need to do after saving a calendar event.
- * (This will start back end tasks such as automatic generation of invitations,
- * if such actions are appropriate.)
- */
-int ical_obj_aftersave(struct CtdlMessage *msg, struct recptypes *recp)
-{
- char roomname[ROOMNAMELEN];
-
- /*
- * If this isn't the Calendar> room, no further action is necessary.
- */
-
- /* First determine if this is our room */
- CtdlMailboxName(roomname, sizeof roomname, &CC->user, USERCALENDARROOM);
- if (strcasecmp(roomname, CC->room.QRname)) {
- return(0); /* Not the Calendar room -- don't do anything. */
- }
-
- /* It must be an RFC822 message! */
- if (msg->cm_format_type != 4) return(1);
-
- /* Reject null messages */
- if (CM_IsEmpty(msg, eMesageText)) return(1);
-
- /* Now recurse through it looking for our icalendar data */
- mime_parser(CM_RANGE(msg, eMesageText),
- *ical_obj_aftersave_backend,
- NULL, NULL,
- NULL,
- 0
- );
-
- return(0);
-}
-
-
-void ical_session_startup(void) {
- CIT_ICAL = malloc(sizeof(struct cit_ical));
- memset(CIT_ICAL, 0, sizeof(struct cit_ical));
-}
-
-
-void ical_session_shutdown(void) {
- free(CIT_ICAL);
-}
-
-
-/*
- * Back end for ical_fixed_output()
- */
-void ical_fixed_output_backend(icalcomponent *cal, int recursion_level) {
- icalcomponent *c;
- icalproperty *p;
- char buf[256];
- const char *ch;
-
- p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
- if (p != NULL) {
- cprintf("%s\n", (const char *)icalproperty_get_comment(p));
- }
-
- p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
- if (p != NULL) {
- cprintf("%s\n", (const char *)icalproperty_get_comment(p));
- }
-
- p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
- if (p != NULL) {
- cprintf("%s\n", (const char *)icalproperty_get_comment(p));
- }
-
- /* If the component has attendees, iterate through them. */
- for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
- ch = icalproperty_get_attendee(p);
- if ((ch != NULL) &&
- !strncasecmp(ch, "MAILTO:", 7)) {
-
- /* screen name or email address */
- safestrncpy(buf, ch + 7, sizeof(buf));
- striplt(buf);
- cprintf("%s ", buf);
- }
- cprintf("\n");
- }
-
- /* If the component has subcomponents, recurse through them. */
- for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
- (c != 0);
- c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
- /* Recursively process subcomponent */
- ical_fixed_output_backend(c, recursion_level+1);
- }
-}
-
-
-/*
- * Function to output iCalendar data as plain text. Nobody uses MSG0
- * anymore, so really this is just so we expose the vCard data to the full
- * text indexer.
- */
-void ical_fixed_output(char *ptr, int len) {
- icalcomponent *cal;
- char *stringy_cal;
-
- stringy_cal = malloc(len + 1);
- safestrncpy(stringy_cal, ptr, len + 1);
- cal = icalcomponent_new_from_string(stringy_cal);
- free(stringy_cal);
-
- if (cal == NULL) {
- return;
- }
-
- ical_fixed_output_backend(cal, 0);
-
- /* Free the memory we obtained from libical's constructor */
- icalcomponent_free(cal);
-}
-
-
-/*
- * Register this module with the Citadel server.
- */
-CTDL_MODULE_INIT(calendar)
-{
- if (!threading)
- {
-
- /* Tell libical to return errors instead of aborting if it gets bad data */
-
-#ifdef LIBICAL_ICAL_EXPORT // cheap and sleazy way to detect libical >=2.0
- icalerror_set_errors_are_fatal(0);
-#else
- icalerror_errors_are_fatal = 0;
-#endif
-
- /* Use our own application prefix in tzid's generated from system tzdata */
- icaltimezone_set_tzid_prefix("/citadel.org/");
-
- /* Initialize our hook functions */
- CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
- CtdlRegisterMessageHook(ical_obj_aftersave, EVT_AFTERSAVE);
- CtdlRegisterSessionHook(ical_CtdlCreateRoom, EVT_LOGIN, PRIO_LOGIN + 1);
- CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCalendar commands");
- CtdlRegisterSessionHook(ical_session_startup, EVT_START, PRIO_START + 1);
- CtdlRegisterSessionHook(ical_session_shutdown, EVT_STOP, PRIO_STOP + 80);
- CtdlRegisterFixedOutputHook("text/calendar", ical_fixed_output);
- CtdlRegisterFixedOutputHook("application/ics", ical_fixed_output);
- }
-
- /* return our module name for the log */
- return "calendar";
-}
projects / citadel.git / blobdiff