Penumbra/Penumbra/Meta/Manipulations/EqpManipulation.cs

using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Penumbra.GameData.Enums;
using Penumbra.GameData.Structs;
using Penumbra.Interop.Structs;
using Penumbra.Meta.Files;
using Penumbra.Util;
using SharpCompress.Common;

namespace Penumbra.Meta.Manipulations;

[StructLayout(LayoutKind.Sequential, Pack = 1)]
public readonly struct EqpManipulation : IMetaManipulation<EqpManipulation>
{
    [JsonConverter(typeof(ForceNumericFlagEnumConverter))]
    public EqpEntry Entry { get; private init; }

    public PrimaryId SetId { get; private init; }

    [JsonConverter(typeof(StringEnumConverter))]
    public EquipSlot Slot { get; private init; }

    [JsonConstructor]
    public EqpManipulation(EqpEntry entry, EquipSlot slot, PrimaryId setId)
    {
        Slot  = slot;
        SetId = setId;
        Entry = Eqp.Mask(slot) & entry;
    }

    public EqpManipulation Copy(EqpEntry entry)
        => new(entry, Slot, SetId);

    public override string ToString()
        => $"Eqp - {SetId} - {Slot}";

    public bool Equals(EqpManipulation other)
        => Slot == other.Slot
         && SetId == other.SetId;

    public override bool Equals(object? obj)
        => obj is EqpManipulation other && Equals(other);

    public override int GetHashCode()
        => HashCode.Combine((int)Slot, SetId);

    public int CompareTo(EqpManipulation other)
    {
        var set = SetId.Id.CompareTo(other.SetId.Id);
        return set != 0 ? set : Slot.CompareTo(other.Slot);
    }

    public MetaIndex FileIndex()
        => MetaIndex.Eqp;

    public bool Apply(ExpandedEqpFile file)
    {
        var entry = file[SetId];
        var mask  = Eqp.Mask(Slot);
        if ((entry & mask) == Entry)
            return false;

        file[SetId] = (entry & ~mask) | Entry;
        return true;
    }

    public bool Validate()
    {
        var mask = Eqp.Mask(Slot);
        if (mask == 0)
            return false;
        if ((Entry & mask) != Entry)
            return false;

        // No check for set id.

        return true;
    }
}