private static MapiStream OpenAndLockStream(MapiFolder oofHistoryFolder, byte[] initialBytes, long hashCode, out bool isNew)
{
MapiStream mapiStream = null;
isNew = false;
OpenPropertyFlags openPropertyFlags = OpenPropertyFlags.Modify | OpenPropertyFlags.DeferredErrors;
try
{
mapiStream = oofHistoryFolder.OpenStream(PropTag.OofHistory, openPropertyFlags);
OofHistory.LockStreamWithRetry(mapiStream, hashCode);
}
catch (MapiExceptionNotFound)
{
if (mapiStream != null)
{
mapiStream.Dispose();
mapiStream = null;
}
OofHistory.Tracer.TraceDebug(hashCode, "OOF history property does not exist, trying to open with create flag.");
openPropertyFlags |= OpenPropertyFlags.Create;
mapiStream = oofHistoryFolder.OpenStream(PropTag.OofHistory, openPropertyFlags);
OofHistory.LockStreamWithRetry(mapiStream, hashCode);
OofHistory.ResetOofHistoryProperty(mapiStream, initialBytes, hashCode);
isNew = true;
}
return(mapiStream);
}
internal static void RemoveOofHistoryEntriesWithProperty(MailboxSession itemStore, bool oofEnabled, OofHistory.PropId propId, byte[] propValue)
{
MapiFolder mapiFolder = null;
MapiFolder mapiFolder2 = null;
MapiStream mapiStream = null;
bool flag = false;
byte[] initialBytes = oofEnabled ? OofHistory.InitialBytesOofStateOn : OofHistory.InitialBytesOofStateOff;
try
{
if (OofHistory.TryOpenFolder(itemStore, out mapiFolder, out mapiFolder2))
{
long hashCode = (long)itemStore.GetHashCode();
bool flag2;
mapiStream = OofHistory.OpenAndLockStream(mapiFolder2, initialBytes, hashCode, out flag2);
flag = true;
if (!flag2)
{
int num;
if (OofHistory.TryGetStreamLengthForEntryRemoval(hashCode, mapiStream, out num))
{
byte[] buffer;
if (OofHistory.TryReadAllFromStream(hashCode, mapiStream, num, out buffer))
{
int num2 = OofHistory.RemoveEntriesWithProperty(num, buffer, propId, propValue, hashCode);
if (num2 < num)
{
mapiStream.Seek(0L, SeekOrigin.Begin);
mapiStream.Write(buffer, 0, num2);
mapiStream.SetLength((long)num2);
}
}
}
}
}
}
finally
{
if (mapiStream != null)
{
try
{
if (flag)
{
mapiStream.UnlockRegion(0L, 1L, 1);
}
}
finally
{
mapiStream.Dispose();
}
}
if (mapiFolder != null)
{
mapiFolder.Dispose();
mapiFolder = null;
}
if (mapiFolder2 != null)
{
mapiFolder2.Dispose();
mapiFolder2 = null;
}
}
}
internal static void ClearOofHistory(MailboxSession itemStore, bool oofEnabled)
{
MapiFolder mapiFolder = null;
MapiFolder mapiFolder2 = null;
MapiStream mapiStream = null;
bool flag = false;
byte[] initialBytes = oofEnabled ? OofHistory.InitialBytesOofStateOn : OofHistory.InitialBytesOofStateOff;
try
{
if (OofHistory.TryOpenFolder(itemStore, out mapiFolder, out mapiFolder2))
{
long num = (long)itemStore.GetHashCode();
bool flag2;
mapiStream = OofHistory.OpenAndLockStream(mapiFolder2, initialBytes, num, out flag2);
flag = true;
if (!flag2)
{
byte[] array = new byte[2];
if (2 != mapiStream.Read(array, 0, 2))
{
OofHistory.ResetOofHistoryProperty(mapiStream, initialBytes, num);
}
else
{
bool flag3 = 0 != array[1];
if (flag3 == oofEnabled)
{
OofHistory.Tracer.TraceDebug <bool>(num, "Current OOF state {0} matches in OOF history and mailbox properties, clear is not executed.", oofEnabled);
}
else
{
OofHistory.ResetOofHistoryProperty(mapiStream, initialBytes, num);
}
}
}
}
}
finally
{
if (mapiStream != null)
{
try
{
if (flag)
{
mapiStream.UnlockRegion(0L, 1L, 1);
}
}
finally
{
mapiStream.Dispose();
}
}
if (mapiFolder != null)
{
mapiFolder.Dispose();
mapiFolder = null;
}
if (mapiFolder2 != null)
{
mapiFolder2.Dispose();
mapiFolder2 = null;
}
}
}