* More license declarations
[citadel.git] / citadel / modules / calendar / serv_calendar.c
index 9d859b5ee196ff8bfe29adeff0a9af6c7745ffd4..1dd5935e045f3459d88804e52659b4e08e7685d0 100644 (file)
@@ -5,6 +5,22 @@
  * room on a Citadel server.  It handles iCalendar objects using the
  * iTIP protocol.  See RFCs 2445 and 2446.
  *
+ *
+ * Copyright (c) 1987-2009 by the citadel.org team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #define PRODID "-//Citadel//NONSGML Citadel Calendar//EN"
@@ -808,51 +824,64 @@ int ical_ctdl_is_overlap(
                        struct icaltimetype t2start,
                        struct icaltimetype t2end
 ) {
-
        if (icaltime_is_null_time(t1start)) return(0);
        if (icaltime_is_null_time(t2start)) return(0);
 
-       /* First, check for all-day events */
-       if (t1start.is_date) {
-               if (!icaltime_compare_date_only(t1start, t2start)) {
-                       return(1);
-               }
-               if (!icaltime_is_null_time(t2end)) {
-                       if (!icaltime_compare_date_only(t1start, t2end)) {
-                               return(1);
-                       }
+       /* 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 (t2start.is_date) {
-               if (!icaltime_compare_date_only(t2start, t1start)) {
-                       return(1);
-               }
-               if (!icaltime_is_null_time(t1end)) {
-                       if (!icaltime_compare_date_only(t2start, t1end)) {
-                               return(1);
-                       }
+       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);   
                }
        }
 
-       /* Now check for overlaps using date *and* time. */
+       /* 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);
 
-       /* First, bail out if either event 1 or event 2 is missing end time. */
-       if (icaltime_is_null_time(t1end)) return(0);
-       if (icaltime_is_null_time(t2end)) 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);
+       }
+
+       /* lprintf (9, "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);
+       /* lprintf(9, "first passed\n"); */
 
        /* If event 2 ends before event 1 starts, we're also ok. */
        if (icaltime_compare(t2end, t1start) <= 0) return(0);
+       /* lprintf(9, "second passed\n"); */
 
        /* Otherwise, they overlap. */
        return(1);
 }
 
-
-
 /* 
  * Phase 6 of "hunt for conflicts"
  * called by ical_conflicts_phase5()
@@ -1263,8 +1292,23 @@ void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
        /*
         * Now begin calculating the event start and end times.
         */
-       dtstart = icalcomponent_get_dtstart(cal);
-       if (icaltime_is_null_time(dtstart)) return;
+       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)) {
@@ -1279,18 +1323,24 @@ void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
        }
 
        do {
-
-
-               // FIXME add timezone conversion, we are currently outputting floating times
-
-
-
                /* 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));
@@ -1300,11 +1350,11 @@ void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
                 */
                p = icalcomponent_get_first_property(fb, ICAL_DTSTART_PROPERTY);
                if (p == NULL) {
-                       icalcomponent_set_dtstart(fb, dtstart);
+                       icalcomponent_set_dtstart(fb, this_event_period.start);
                }
                else {
-                       if (icaltime_compare(dtstart, icalcomponent_get_dtstart(fb)) < 0) {
-                               icalcomponent_set_dtstart(fb, dtstart);
+                       if (icaltime_compare(this_event_period.start, icalcomponent_get_dtstart(fb)) < 0) {
+                               icalcomponent_set_dtstart(fb, this_event_period.start);
                        }
                }
        
@@ -1313,11 +1363,11 @@ void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
                 */
                p = icalcomponent_get_first_property(fb, ICAL_DTEND_PROPERTY);
                if (p == NULL) {
-                       icalcomponent_set_dtend(fb, dtend);
+                       icalcomponent_set_dtend(fb, this_event_period.end);
                }
                else {
-                       if (icaltime_compare(dtend, icalcomponent_get_dtend(fb)) > 0) {
-                               icalcomponent_set_dtend(fb, dtend);
+                       if (icaltime_compare(this_event_period.end, icalcomponent_get_dtend(fb)) > 0) {
+                               icalcomponent_set_dtend(fb, this_event_period.end);
                        }
                }
 
@@ -1325,6 +1375,8 @@ void ical_add_to_freebusy(icalcomponent *fb, icalcomponent *top_level_cal) {
                        dtstart = icalrecur_iterator_next(ritr);
                        if (!icaltime_is_null_time(dtend)) {
                                dtend = icaltime_add(dtstart, dur);
+                               dtend.zone = dtstart.zone;
+                               dtend.is_utc = dtstart.is_utc;
                        }
                        ++num_recur;
                }
@@ -1627,7 +1679,7 @@ void ical_getics(void)
 
        encaps = icalcomponent_new_vcalendar();
        if (encaps == NULL) {
-               CtdlLogPrintf(CTDL_DEBUG, "ERROR: could not allocate component!\n");
+               CtdlLogPrintf(CTDL_ALERT, "ERROR: could not allocate component!\n");
                cprintf("%d Could not allocate memory\n", ERROR+INTERNAL_ERROR);
                return;
        }
@@ -1952,11 +2004,13 @@ void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal)
        size_t reqsize;
        icalproperty *p;
        struct icaltimetype t;
-       icaltimezone *attached_zones[5] = { NULL, NULL, NULL, NULL, NULL };
+       const icaltimezone *attached_zones[5] = { NULL, NULL, NULL, NULL, NULL };
        int i;
-       icaltimezone *z;
+       const icaltimezone *z;
        int num_zones_attached = 0;
        int zone_already_attached;
+       icalparameter *tzidp = NULL;
+       const char *tzidc = NULL;
 
        if (cal == NULL) {
                CtdlLogPrintf(CTDL_ERR, "ERROR: trying to reply to NULL event?\n");
@@ -2026,7 +2080,7 @@ void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal)
        /* Encapsulate the VEVENT component into a complete VCALENDAR */
        encaps = icalcomponent_new_vcalendar();
        if (encaps == NULL) {
-               CtdlLogPrintf(CTDL_DEBUG, "ERROR: could not allocate component!\n");
+               CtdlLogPrintf(CTDL_ALERT, "ERROR: could not allocate component!\n");
                icalcomponent_free(the_request);
                return;
        }
@@ -2060,9 +2114,15 @@ void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal)
                  || (icalproperty_isa(p) == ICAL_RECURRENCEID_PROPERTY)
                ) {
                        t = icalproperty_get_dtstart(p);        // it's safe to use dtstart for all of them
-                       CtdlLogPrintf(CTDL_DEBUG, "Found an icaltimetype: %s\n",
-                               icaltime_as_ical_string(t)
-                       );
+
+                       /* 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)) {
@@ -2071,40 +2131,29 @@ void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal)
                        else {
                                z = icaltime_get_timezone(t);
                        }
-                       if (z) CtdlLogPrintf(CTDL_DEBUG, "Timezone is present in data structure\n");
 
                        /* If not, try to determine the tzid from the parameter using attached zones */
-                       if (!z) {
-                               z = icalcomponent_get_timezone(top_level_cal,
-                                       icalparameter_get_tzid(
-                                               icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
-                                       )
-                               );
-                               if (z) CtdlLogPrintf(CTDL_DEBUG, "Timezone was found in attached zones\n");
+                       if ((!z) && (tzidc)) {
+                               z = icalcomponent_get_timezone(top_level_cal, tzidc);
                        }
 
                        /* Still no good?  Try our internal database */
-                       if (!z) {
-                               z = icaltimezone_get_builtin_timezone_from_tzid(
-                                       icalparameter_get_tzid(
-                                               icalproperty_get_first_parameter(p, ICAL_TZID_PARAMETER)
-                                       )
-                               );
-                               if (z) CtdlLogPrintf(CTDL_DEBUG, "Timezone was found in internal db\n");
+                       if ((!z) && (tzidc)) {
+                               z = icaltimezone_get_builtin_timezone_from_tzid(tzidc);
                        }
 
                        if (z) {
-                               CtdlLogPrintf(CTDL_DEBUG, "Have valid timezone, need to attach it.\n");
+                               /* 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;
-                                               CtdlLogPrintf(CTDL_DEBUG, "zone already attached!!\n");
                                        }
                                }
                                if ((!zone_already_attached) && (num_zones_attached < 5)) {
-                                       CtdlLogPrintf(CTDL_DEBUG, "attach zone %d\n", num_zones_attached);
+                                       /* This is a new one, so attach it. */
                                        attached_zones[num_zones_attached++] = z;
                                }
 
@@ -2133,8 +2182,6 @@ void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal)
        icalcomponent_free(encaps);     /* Don't need this anymore. */
        if (serialized_request == NULL) return;
 
-       CtdlLogPrintf(CTDL_DEBUG, "SENDING INVITATIONS:\n%s\n", serialized_request);
-
        reqsize = strlen(serialized_request) + SIZ;
        request_message_text = malloc(reqsize);
        if (request_message_text != NULL) {
@@ -2143,16 +2190,20 @@ void ical_send_out_invitations(icalcomponent *top_level_cal, icalcomponent *cal)
                        serialized_request
                );
 
-               msg = CtdlMakeMessage(&CC->user,
-                       "",                     /* No single recipient here */
-                       "",                     /* No single recipient here */
-                       CC->room.QRname, 0, FMT_RFC822,
-                       "",
-                       "",
+               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);
+                       NULL
+               );
        
                if (msg != NULL) {
                        valid = validate_recipients(attendees_string, NULL, 0);