// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Collections;
 
namespace Microsoft.AspNetCore.Rewrite.IISUrlRewrite;
 
internal sealed class IISRewriteMapCollection : IEnumerable<IISRewriteMap>
{
    private readonly Dictionary<string, IISRewriteMap> _rewriteMaps = new Dictionary<string, IISRewriteMap>();
 
    public void Add(IISRewriteMap rewriteMap)
    {
        if (rewriteMap != null)
        {
            _rewriteMaps[rewriteMap.Name] = rewriteMap;
        }
    }
 
    public int Count => _rewriteMaps.Count;
 
    public IISRewriteMap? this[string key]
    {
        get
        {
            return _rewriteMaps.TryGetValue(key, out var value) ? value : null;
        }
    }
 
    IEnumerator IEnumerable.GetEnumerator()
    {
        return _rewriteMaps.Values.GetEnumerator();
    }
 
    public IEnumerator<IISRewriteMap> GetEnumerator()
    {
        return _rewriteMaps.Values.GetEnumerator();
    }
}