/// <summary>
/// Computes the feature.
/// </summary>
/// <param name="user">The user.</param>
/// <param name="message">The message.</param>
/// <returns>
/// The active bucket.
/// </returns>
public override FeatureBucket ComputeFeature(User user, Message message)
{
if (string.IsNullOrEmpty(message.SubjectPrefix))
{
return(this.Buckets[0]);
}
// FeatureNames[0] is the catch-all bin
// Note this finds the first matching prefix only.
foreach (var bucket in Buckets.Skip(1).Take(this.Buckets.Count - 2))
{
foreach (string prefix in bucket.Item)
{
if (message.SubjectPrefix == prefix)
{
return(bucket);
}
}
}
return(this.Buckets.Last());
}