TilesheetDefinitionSource.cs

using Newtonsoft.Json;
 
namespace Gondwana.Drawing.Tilesheets.GTS;

public sealed class TilesheetDefinitionSource
{
    [JsonConstructor]
    private TilesheetDefinitionSource() { }

    [JsonProperty]
    public TilesheetDefinitionSourceKind Kind { get; private init; }

    [JsonProperty]
    public string? GtsFilePath { get; private init; }

    [JsonProperty]
    public string? AssetsFilePath { get; private init; }

    [JsonProperty]
    public string? AssetEntryName { get; private init; }

    public static TilesheetDefinitionSource LooseDefinitionFile(string gtsFilePath)
    {
        if (string.IsNullOrWhiteSpace(gtsFilePath))
            throw new ArgumentException("GTS file path must be a non-empty string.", nameof(gtsFilePath));
 
        return new TilesheetDefinitionSource
        {
            Kind = TilesheetDefinitionSourceKind.LooseDefinitionFile,
            GtsFilePath = gtsFilePath
        };
    }

    public static TilesheetDefinitionSource PackedDefinitionFile(string assetsFilePath, string assetEntryName)
    {
        if (string.IsNullOrWhiteSpace(assetsFilePath))
            throw new ArgumentException("Assets file path must be a non-empty string.", nameof(assetsFilePath));
 
        if (string.IsNullOrWhiteSpace(assetEntryName))
            throw new ArgumentException("Asset entry name must be a non-empty string.", nameof(assetEntryName));
 
        return new TilesheetDefinitionSource
        {
            Kind = TilesheetDefinitionSourceKind.PackedDefinitionFile,
            AssetsFilePath = assetsFilePath,
            AssetEntryName = assetEntryName
        };
    }

    public static TilesheetDefinitionSource Generated() =>
        new()
        {
            Kind = TilesheetDefinitionSourceKind.Generated
        };

    public static TilesheetDefinitionSource None() =>
        new()
        {
            Kind = TilesheetDefinitionSourceKind.None
        };
}