+++ /dev/null
-/*
- * Copyright (c) 1996-2012 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.
- */
-
-
-#include "webcit.h"
-#include "webserver.h"
-#include "calendar.h"
-
-/*
- * Utility function to fetch a VFREEBUSY type of thing for any specified user.
- */
-icalcomponent *get_freebusy_for_user(char *who) {
- long nLines;
- char buf[SIZ];
- StrBuf *serialized_fb = NewStrBuf();
- icalcomponent *fb = NULL;
-
- serv_printf("ICAL freebusy|%s", who);
- serv_getln(buf, sizeof buf);
- if (buf[0] == '1') {
- read_server_text(serialized_fb, &nLines);
- }
-
- if (serialized_fb == NULL) {
- return NULL;
- }
-
- fb = icalcomponent_new_from_string(ChrPtr(serialized_fb));
- FreeStrBuf(&serialized_fb);
- if (fb == NULL) {
- return NULL;
- }
-
- return(fb);
-}
-
-
-/*
- * Check to see if two events overlap.
- * (This function is used in both Citadel and WebCit. If you change it in
- * one place, change it in the other. We should seriously consider moving
- * this function upstream into libical.)
- *
- * Returns nonzero if they do overlap.
- */
-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 \n",
- 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, "first passed\n"); */
-
- /* If event 2 ends before event 1 starts, we're also ok. */
- if (icaltime_compare(t2end, t1start) <= 0) return(0);
- /* syslog(LOG_DEBUG, "second passed\n"); */
-
- /* Otherwise, they overlap. */
- return(1);
-}
-
-
-
-/*
- * Back end function for check_attendee_availability()
- * This one checks an individual attendee against a supplied
- * event start and end time. All these fields have already been
- * broken out.
- *
- * attendee_string name of the attendee
- * event_start start time of the event to check
- * event_end end time of the event to check
- *
- * The result is placed in 'annotation'.
- */
-void check_individual_attendee(char *attendee_string,
- struct icaltimetype event_start,
- struct icaltimetype event_end,
- char *annotation) {
-
- icalcomponent *fbc = NULL;
- icalcomponent *fb = NULL;
- icalproperty *thisfb = NULL;
- struct icalperiodtype period;
-
- /*
- * Set to 'unknown' right from the beginning. Unless we learn
- * something else, that's what we'll go with.
- */
- strcpy(annotation, _("availability unknown"));
-
- fbc = get_freebusy_for_user(attendee_string);
- if (fbc == NULL) {
- return;
- }
-
- /*
- * Make sure we're looking at a VFREEBUSY by itself. What we're probably
- * looking at initially is a VFREEBUSY encapsulated in a VCALENDAR.
- */
- if (icalcomponent_isa(fbc) == ICAL_VCALENDAR_COMPONENT) {
- fb = icalcomponent_get_first_component(fbc, ICAL_VFREEBUSY_COMPONENT);
- }
- else if (icalcomponent_isa(fbc) == ICAL_VFREEBUSY_COMPONENT) {
- fb = fbc;
- }
-
- /* Iterate through all FREEBUSY's looking for conflicts. */
- if (fb != NULL) {
-
- strcpy(annotation, _("free"));
-
- for (thisfb = icalcomponent_get_first_property(fb, ICAL_FREEBUSY_PROPERTY);
- thisfb != NULL;
- thisfb = icalcomponent_get_next_property(fb, ICAL_FREEBUSY_PROPERTY) ) {
-
- /** Do the check */
- period = icalproperty_get_freebusy(thisfb);
- if (ical_ctdl_is_overlap(period.start, period.end,
- event_start, event_end)) {
- strcpy(annotation, _("BUSY"));
- }
-
- }
- }
-
- icalcomponent_free(fbc);
-}
-
-
-
-
-/*
- * Check the availability of all attendees for an event (when possible)
- * and annotate accordingly.
- *
- * vevent the event which should be compared with attendees calendar
- */
-void check_attendee_availability(icalcomponent *vevent) {
- icalproperty *attendee = NULL;
- icalproperty *dtstart_p = NULL;
- icalproperty *dtend_p = NULL;
- struct icaltimetype dtstart_t;
- struct icaltimetype dtend_t;
- char attendee_string[SIZ];
- char annotated_attendee_string[SIZ];
- char annotation[SIZ];
- const char *ch;
-
- if (vevent == NULL) {
- return;
- }
-
- /*
- * If we're looking at a fully encapsulated VCALENDAR
- * rather than a VEVENT component, attempt to use the first
- * relevant VEVENT subcomponent. If there is none, the
- * NULL returned by icalcomponent_get_first_component() will
- * tell the next iteration of this function to create a
- * new one.
- */
- if (icalcomponent_isa(vevent) == ICAL_VCALENDAR_COMPONENT) {
- check_attendee_availability(
- icalcomponent_get_first_component(
- vevent, ICAL_VEVENT_COMPONENT
- )
- );
- return;
- }
-
- ical_dezonify(vevent); /**< Convert everything to UTC */
-
- /*
- * Learn the start and end times.
- */
- dtstart_p = icalcomponent_get_first_property(vevent, ICAL_DTSTART_PROPERTY);
- if (dtstart_p != NULL) dtstart_t = icalproperty_get_dtstart(dtstart_p);
-
- dtend_p = icalcomponent_get_first_property(vevent, ICAL_DTEND_PROPERTY);
- if (dtend_p != NULL) dtend_t = icalproperty_get_dtend(dtend_p);
-
- /*
- * Iterate through attendees.
- */
- for (attendee = icalcomponent_get_first_property(vevent, ICAL_ATTENDEE_PROPERTY);
- attendee != NULL;
- attendee = icalcomponent_get_next_property(vevent, ICAL_ATTENDEE_PROPERTY)) {
- ch = icalproperty_get_attendee(attendee);
- if ((ch != NULL) && !strncasecmp(ch, "MAILTO:", 7)) {
-
- /** screen name or email address */
- safestrncpy(attendee_string, ch + 7, sizeof(attendee_string));
- string_trim(attendee_string);
-
- check_individual_attendee(attendee_string,
- dtstart_t, dtend_t,
- annotation);
-
- /** Replace the attendee name with an annotated one. */
- snprintf(annotated_attendee_string, sizeof annotated_attendee_string,
- "MAILTO:%s (%s)", attendee_string, annotation);
- icalproperty_set_attendee(attendee, annotated_attendee_string);
-
- }
- }
-
-}
-
projects / citadel.git / blobdiff