PKHeX/PKHeX.Core/Legality/Verifiers/Ribbons/RibbonResult.cs
Kurt 768047cd80
Legality: Rewrite Ribbon Verifier (#3570)
* Rewrite ribbon verification
* Explicitly verifies all ribbons instead of chained iterators.
* Verifies using only the stack, using `struct` and `Span<T>`. No allocation on heap, or `IEnumerable` iterators.
* Verifies all egg ribbons using a separate method, explicitly implemented. No reflection overhead.
* Separates each ribbon interface to separate `static` classes. Easier to identify code needing change on new game update.
* Extracted logic for specific ribbons. Can easily revise complicated ribbon's acquisition rules.
* Simplifies GiveAll/RemoveAll legal ribbon mutations. No reflection overhead, and no allocation.
* Can be expanded in the future if we need to track conditions for ribbon acquisition (was Sinnoh Champ received in BDSP or Gen4?)

End result is a more performant implementation and easier to maintain & reuse logic.
2022-08-15 21:04:30 -07:00

64 lines
2.2 KiB
C#

using System;
using static PKHeX.Core.RibbonParseFlags;
namespace PKHeX.Core;
public readonly record struct RibbonResult
{
private readonly byte Value;
private readonly RibbonParseFlags Flags;
/// <summary>
/// True: ribbon is missing -- should have the ribbon.
/// False: ribbon is invalid -- should not have the ribbon.
/// </summary>
public bool IsMissing => (Flags & Missing) != 0;
private RibbonParseFlags Type => Flags & ~Missing;
public RibbonResult(RibbonIndex index, bool missing = false) { Value = (byte)index; Flags = missing ? MissingM : Mainline; }
public RibbonResult(RibbonIndex3 index, bool missing = false) { Value = (byte)index; Flags = missing ? Missing3 : Index3; }
public RibbonResult(RibbonIndex4 index, bool missing = false) { Value = (byte)index; Flags = missing ? Missing4 : Index4; }
public bool Equals(RibbonIndex index) => Type == Mainline && Value == (byte)index;
public bool Equals(RibbonIndex3 index) => Type == Index3 && Value == (byte)index;
public bool Equals(RibbonIndex4 index) => Type == Index4 && Value == (byte)index;
/// <summary>
/// Property Name that the ribbon can be get/set with, or looked up for localization.
/// </summary>
public string PropertyName => Type switch
{
Mainline => ((RibbonIndex)Value).GetPropertyName(),
Index3 => ((RibbonIndex3)Value).GetPropertyName(),
Index4 => ((RibbonIndex4)Value).GetPropertyName(),
_ => throw new ArgumentOutOfRangeException(),
};
/// <summary>
/// Updates the ribbon state depending on the <see cref="args"/> and <see cref="IsMissing"/> state.
/// </summary>
public void Fix(RibbonVerifierArguments args)
{
switch (Type)
{
case Mainline: ((RibbonIndex)Value).Fix(args, IsMissing); break;
case Index3: ((RibbonIndex3)Value).Fix(args, IsMissing); break;
case Index4: ((RibbonIndex4)Value).Fix(args, IsMissing); break;
default: throw new ArgumentOutOfRangeException();
}
}
}
[Flags]
public enum RibbonParseFlags : byte
{
None = 0,
Mainline,
Index3,
Index4,
Missing = 0x80,
MissingM = Missing | Mainline,
Missing3 = Missing | Index3,
Missing4 = Missing | Index4,
}