# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1411680081 -7200
# Node ID 01eb9de3415e7fd77db5799e29a8f92d8ebca7ae
# Parent  c38609e4aef22fb1fb9cfa4d86fc131f13117c4b
Introduced explicit VALUE attribute handling for dates and datetimes.
Added FBTYPE attributes to FREEBUSY properties.
Introduced support for TRANSP properties.

diff -r c38609e4aef2 -r 01eb9de3415e imip_agent.py
--- a/imip_agent.py	Wed Sep 24 16:48:32 2014 +0200
+++ b/imip_agent.py	Thu Sep 25 23:21:21 2014 +0200
@@ -86,7 +86,9 @@
 def get_utc_datetime(d, name):
     value, attr = get_item(d, name)
     dt = get_datetime(value, attr)
-    if isinstance(dt, datetime):
+    if not dt:
+        return None
+    elif isinstance(dt, datetime):
         return dt.astimezone(timezone("UTC")).strftime("%Y%m%dT%H%M%SZ")
     else:
         return dt.strftime("%Y%m%d")
@@ -103,27 +105,29 @@
     except UnknownTimeZoneError:
         tz = None
 
-    m = match_datetime_icalendar(value)
-    if m:
-        dt = datetime(
-            int(m.group("year")), int(m.group("month")), int(m.group("day")),
-            int(m.group("hour")), int(m.group("minute")), int(m.group("second"))
-            )
+    if attr.get("VALUE") in (None, "DATE-TIME"):
+        m = match_datetime_icalendar(value)
+        if m:
+            dt = datetime(
+                int(m.group("year")), int(m.group("month")), int(m.group("day")),
+                int(m.group("hour")), int(m.group("minute")), int(m.group("second"))
+                )
 
-        # Impose the indicated timezone.
-        # NOTE: This needs an ambiguity policy for DST changes.
+            # Impose the indicated timezone.
+            # NOTE: This needs an ambiguity policy for DST changes.
 
-        tz = m.group("utc") and timezone("UTC") or tz or None
-        if tz is not None:
-            return tz.localize(dt)
-        else:
-            return dt
+            tz = m.group("utc") and timezone("UTC") or tz or None
+            if tz is not None:
+                return tz.localize(dt)
+            else:
+                return dt
 
-    m = match_date_icalendar(value)
-    if m:
-        return date(
-            int(m.group("year")), int(m.group("month")), int(m.group("day"))
-            )
+    if attr.get("VALUE") == "DATE":
+        m = match_date_icalendar(value)
+        if m:
+            return date(
+                int(m.group("year")), int(m.group("month")), int(m.group("day"))
+                )
     return None
 
 # Time management.
@@ -445,7 +449,10 @@
 
             if not conflict:
                 insert_period(freebusy, (dtstart, dtend, self.uid))
-                self.store.set_freebusy(attendee, freebusy)
+
+                if self.get_value("TRANSP") in (None, "TRANSPARENT"):
+                    self.store.set_freebusy(attendee, freebusy)
+
                 self.store.set_event(attendee, self.uid, to_node(
                     {"VEVENT" : [(self.details, {})]}
                     ))
@@ -510,7 +517,7 @@
                 rwrite(("UID", {}, self.uid))
 
                 for start, end, uid in freebusy:
-                    rwrite(("FREEBUSY", {}, [start, end]))
+                    rwrite(("FREEBUSY", {"FBTYPE" : "BUSY"}, [start, end]))
 
                 cwrite(("VFREEBUSY", {}, record))