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80 lines
3.3 KiB
80 lines
3.3 KiB
using IPA.Config.Data;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace IPA.Config.Stores.Converters
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{
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/// <summary>
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/// Provides utility functions for custom converters.
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/// </summary>
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public static class Converter
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{
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/// <summary>
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/// Gets the integral value of a <see cref="Value"/>, coercing a <see cref="FloatingPoint"/> if necessary,
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/// or <see langword="null"/> if <paramref name="val"/> is not an <see cref="Integer"/> or <see cref="FloatingPoint"/>.
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/// </summary>
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/// <param name="val">the <see cref="Value"/> to get the integral value of</param>
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/// <returns>the integral value of <paramref name="val"/>, or <see langword="null"/></returns>
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public static long? IntValue(Value val)
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=> val is Integer inte ? inte.Value :
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val is FloatingPoint fp ? fp.AsInteger()?.Value :
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null;
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/// <summary>
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/// Gets the floaing point value of a <see cref="Value"/>, coercing an <see cref="Integer"/> if necessary,
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/// or <see langword="null"/> if <paramref name="val"/> is not an <see cref="Integer"/> or <see cref="FloatingPoint"/>.
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/// </summary>
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/// <param name="val">the <see cref="Value"/> to get the floaing point value of</param>
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/// <returns>the floaing point value of <paramref name="val"/>, or <see langword="null"/></returns>
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public static decimal? FloatValue(Value val)
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=> val is FloatingPoint fp ? fp.Value :
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val is Integer inte ? inte.AsFloat()?.Value :
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null;
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}
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public class CustomObjectConverter<T> : ValueConverter<T> where T : class
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{
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private interface IImpl
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{
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T FromValue(Value value, object parent);
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Value ToValue(T obj, object parent);
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}
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private class Impl<U> : IImpl where U : class, GeneratedStore.IGeneratedStore, T
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{
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private static readonly GeneratedStore.GeneratedStoreCreator creator = GeneratedStore.GetCreator(typeof(T));
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public T FromValue(Value value, object parent)
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{ // lots of casting here, but it works i promise
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var obj = creator(parent as GeneratedStore.IGeneratedStore) as U;
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obj.Deserialize(value);
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return obj;
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}
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public Value ToValue(T obj, object parent)
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{
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if (obj is GeneratedStore.IGeneratedStore store)
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return store.Serialize();
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else
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return null; // TODO: make this behave sanely instead of just giving null
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}
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}
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private static readonly IImpl impl = (IImpl)Activator.CreateInstance(
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typeof(Impl<>).MakeGenericType(GeneratedStore.GetGeneratedType(typeof(T))));
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public static T Deserialize(Value value, object parent)
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=> impl.FromValue(value, parent);
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public static Value Serialize(T obj, object parent)
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=> impl.ToValue(obj, parent);
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public override T FromValue(Value value, object parent)
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=> impl.FromValue(value, parent);
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public override Value ToValue(T obj, object parent)
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=> impl.ToValue(obj, parent);
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}
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}
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