adas-core/adas-core.Domain/Utils/EquatableDictionary.cs

namespace adas_core.Domain.Utils;

public sealed class EquatableDictionary<TKey, TValue>
    : Dictionary<TKey, TValue>, IEquatable<ComparableDictionary<TKey, TValue>>
    where TKey : notnull where TValue : notnull
{
    public bool Equals(ComparableDictionary<TKey, TValue>? other)
    {
        if (other is null) return false;
        if (Count != other.Count) return false;
        foreach (var pair in this)
        {
            if (!other.TryGetValue(pair.Key, out var otherValue)) return false;
            if (!EqualityComparer<TValue>.Default.Equals(pair.Value, otherValue)) return false;
        }

        return true;
    }
    //private readonly Dictionary<TKey, TValue> dictionary = new();

    public override bool Equals(object? other)
    {
        return Equals(other as ComparableDictionary<TKey, TValue>);
    }

    public override int GetHashCode()
    {
        var hash = 0;
        foreach (var pair in this)
        {
            var miniHash = 17;
            miniHash = miniHash * 31 +
                       EqualityComparer<TKey>.Default.GetHashCode(pair.Key);
            miniHash = miniHash * 31 +
                       EqualityComparer<TValue>.Default.GetHashCode(pair.Value);
            hash ^= miniHash;
        }

        return hash;
    }

    // Implementation of IDictionary<,> which just delegates to the dictionary
}