WutheringWaves/Core/Config/ConfigCollection.cs

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using System.Collections.Immutable;
using System.Diagnostics.CodeAnalysis;
using System.Text.Json;
namespace Core.Config;
public class ConfigCollection
{
private readonly ImmutableDictionary<int, IConfig> _configs;
public ConfigCollection(JsonDocument json, Type type)
{
_configs = LoadConfigs(json, type);
}
public int Count => _configs.Count;
public TConfig At<TConfig>(int index) where TConfig : IConfig
{
return (TConfig)_configs.Values.ElementAt(index);
}
public IEnumerable<TConfig> Enumerate<TConfig>() where TConfig : IConfig
{
return _configs.Values.Cast<TConfig>();
}
public bool TryGet<TConfig>(int identifier, [NotNullWhen(true)] out TConfig? config) where TConfig : IConfig
{
bool result = _configs.TryGetValue(identifier, out IConfig? cfg);
config = (TConfig?)cfg;
return result;
}
private static ImmutableDictionary<int, IConfig> LoadConfigs(JsonDocument json, Type type)
{
var builder = ImmutableDictionary.CreateBuilder<int, IConfig>();
foreach (JsonElement element in json.RootElement.EnumerateArray())
{
if (element.ValueKind != JsonValueKind.Object) throw new InvalidDataException($"LoadConfigs: expected array of {JsonValueKind.Object}, got array of {element.ValueKind}");
IConfig configItem = (element.Deserialize(type) as IConfig)!;
builder.Add(configItem.Identifier, configItem);
}
return builder.ToImmutable();
}
}