11 * Utility function to fetch a VFREEBUSY type of thing for any specified user.
13 icalcomponent *get_freebusy_for_user(char *who) {
16 StrBuf *serialized_fb = NULL;
17 icalcomponent *fb = NULL;
19 serv_printf("ICAL freebusy|%s", who);
20 serv_getln(buf, sizeof buf);
22 serialized_fb = read_server_text(&nLines);
25 if (serialized_fb == NULL) {
29 fb = icalcomponent_new_from_string(ChrPtr(serialized_fb));
30 FreeStrBuf(&serialized_fb);
40 * Check to see if two events overlap.
41 * (This function is used in both Citadel and WebCit. If you change it in
42 * one place, change it in the other. We should seriously consider moving
43 * this function upstream into libical.)
45 * Returns nonzero if they do overlap.
47 int ical_ctdl_is_overlap(
48 struct icaltimetype t1start,
49 struct icaltimetype t1end,
50 struct icaltimetype t2start,
51 struct icaltimetype t2end
54 if (icaltime_is_null_time(t1start)) return(0);
55 if (icaltime_is_null_time(t2start)) return(0);
57 /* First, check for all-day events */
58 if (t1start.is_date) {
59 if (!icaltime_compare_date_only(t1start, t2start)) {
62 if (!icaltime_is_null_time(t2end)) {
63 if (!icaltime_compare_date_only(t1start, t2end)) {
69 if (t2start.is_date) {
70 if (!icaltime_compare_date_only(t2start, t1start)) {
73 if (!icaltime_is_null_time(t1end)) {
74 if (!icaltime_compare_date_only(t2start, t1end)) {
80 /* lprintf (9, "Comparing t1start %d:%d t1end %d:%d t2start %d:%d t2end %d:%d \n",
81 t1start.hour, t1start.minute, t1end.hour, t1end.minute,
82 t2start.hour, t2start.minute, t2end.hour, t2end.minute);
85 /* Now check for overlaps using date *and* time. */
87 /* First, bail out if either event 1 or event 2 is missing end time. */
88 if (icaltime_is_null_time(t1end)) return(0);
89 if (icaltime_is_null_time(t2end)) return(0);
91 /* If event 1 ends before event 2 starts, we're in the clear. */
92 if (icaltime_compare(t1end, t2start) <= 0) return(0);
93 // lprintf(9, "first passed\n");
95 /* If event 2 ends before event 1 starts, we're also ok. */
96 if (icaltime_compare(t2end, t1start) <= 0) return(0);
97 // lprintf(9, "second passed\n");
99 /* Otherwise, they overlap. */
106 * \brief dig availability on citserver
107 * Back end function for check_attendee_availability()
108 * This one checks an individual attendee against a supplied
109 * event start and end time. All these fields have already been
111 * \param attendee_string name of the attendee
112 * \param event_start starttime of the event to check
113 * \param event_end endtime of the event to check
114 * \return The result is placed in 'annotation'.
116 void check_individual_attendee(char *attendee_string,
117 struct icaltimetype event_start,
118 struct icaltimetype event_end,
121 icalcomponent *fbc = NULL;
122 icalcomponent *fb = NULL;
123 icalproperty *thisfb = NULL;
124 struct icalperiodtype period;
127 * Set to 'unknown' right from the beginning. Unless we learn
128 * something else, that's what we'll go with.
130 strcpy(annotation, _("availability unknown"));
132 fbc = get_freebusy_for_user(attendee_string);
138 * Make sure we're looking at a VFREEBUSY by itself. What we're probably
139 * looking at initially is a VFREEBUSY encapsulated in a VCALENDAR.
141 if (icalcomponent_isa(fbc) == ICAL_VCALENDAR_COMPONENT) {
142 fb = icalcomponent_get_first_component(fbc, ICAL_VFREEBUSY_COMPONENT);
144 else if (icalcomponent_isa(fbc) == ICAL_VFREEBUSY_COMPONENT) {
148 /** Iterate through all FREEBUSY's looking for conflicts. */
151 strcpy(annotation, _("free"));
153 for (thisfb = icalcomponent_get_first_property(fb, ICAL_FREEBUSY_PROPERTY);
155 thisfb = icalcomponent_get_next_property(fb, ICAL_FREEBUSY_PROPERTY) ) {
158 period = icalproperty_get_freebusy(thisfb);
159 if (ical_ctdl_is_overlap(period.start, period.end,
160 event_start, event_end)) {
161 strcpy(annotation, _("BUSY"));
167 icalcomponent_free(fbc);
174 * \brief check attendees availability
175 * Check the availability of all attendees for an event (when possible)
176 * and annotate accordingly.
177 * \param vevent the event which should be compared with attendees calendar
179 void check_attendee_availability(icalcomponent *vevent) {
180 icalproperty *attendee = NULL;
181 icalproperty *dtstart_p = NULL;
182 icalproperty *dtend_p = NULL;
183 struct icaltimetype dtstart_t;
184 struct icaltimetype dtend_t;
185 char attendee_string[SIZ];
186 char annotated_attendee_string[SIZ];
187 char annotation[SIZ];
189 if (vevent == NULL) {
194 * If we're looking at a fully encapsulated VCALENDAR
195 * rather than a VEVENT component, attempt to use the first
196 * relevant VEVENT subcomponent. If there is none, the
197 * NULL returned by icalcomponent_get_first_component() will
198 * tell the next iteration of this function to create a
201 if (icalcomponent_isa(vevent) == ICAL_VCALENDAR_COMPONENT) {
202 check_attendee_availability(
203 icalcomponent_get_first_component(
204 vevent, ICAL_VEVENT_COMPONENT
210 ical_dezonify(vevent); /**< Convert everything to UTC */
213 * Learn the start and end times.
215 dtstart_p = icalcomponent_get_first_property(vevent, ICAL_DTSTART_PROPERTY);
216 if (dtstart_p != NULL) dtstart_t = icalproperty_get_dtstart(dtstart_p);
218 dtend_p = icalcomponent_get_first_property(vevent, ICAL_DTEND_PROPERTY);
219 if (dtend_p != NULL) dtend_t = icalproperty_get_dtend(dtend_p);
222 * Iterate through attendees.
224 for (attendee = icalcomponent_get_first_property(vevent, ICAL_ATTENDEE_PROPERTY);
226 attendee = icalcomponent_get_next_property(vevent, ICAL_ATTENDEE_PROPERTY)) {
228 strcpy(attendee_string, icalproperty_get_attendee(attendee));
229 if (!strncasecmp(attendee_string, "MAILTO:", 7)) {
231 /** screen name or email address */
232 strcpy(attendee_string, &attendee_string[7]);
233 striplt(attendee_string);
235 check_individual_attendee(attendee_string,
239 /** Replace the attendee name with an annotated one. */
240 snprintf(annotated_attendee_string, sizeof annotated_attendee_string,
241 "MAILTO:%s (%s)", attendee_string, annotation);
242 icalproperty_set_attendee(attendee, annotated_attendee_string);