add

Author: AnakinRaW

src/EawModinfo/Spec/ModInfoFinderCollection.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.IO.Abstractions;
+using System.Linq;
+using AET.Modinfo.File;
+
+namespace AET.Modinfo.Spec;
+
+/// <summary>
+/// Represents the result when a modinfo file query was performed.
+/// </summary>
+public sealed class ModinfoFinderCollection
+{
+    /// <summary>
+    /// Returns <see langword="true"/> if this collection does contain a main modinfo file; <see langword="false"/> otherwise.
+    /// </summary>
+    [MemberNotNullWhen(true, nameof(MainModinfo))]
+    public bool HasMainModinfoFile => MainModinfo != null;
+
+    /// <summary>
+    /// Returns <see langword="true"/> if this collection does contain a variant modinfo files; <see langword="false"/> otherwise.
+    /// </summary>
+    public bool HasVariantModinfoFiles => Variants.Any();
+
+    /// <summary>
+    /// Gets the main modinfo file or <see langword="null"/> if no main modinfo file was found.
+    /// </summary>
+    public MainModinfoFile? MainModinfo { get; }
+
+    /// <summary>
+    /// Gets a collection of found variant modinfo file.
+    /// </summary>
+    public IReadOnlyCollection<ModinfoVariantFile> Variants { get; }
+
+    /// <summary>
+    /// Gets the directory where the files were searched.
+    /// </summary>
+    public IDirectoryInfo Directory { get; }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ModinfoFinderCollection"/> of the specified directory and found modinfo files.
+    /// </summary>
+    /// <param name="directory">The directory that was searched.</param>
+    /// <param name="mainModinfo">The found main modinfo file or <see langword="null"/>.</param>
+    /// <param name="variants">A collection of variant modinfo files.</param>
+    /// <exception cref="ArgumentNullException"><paramref name="directory"/> or <paramref name="variants"/> is <see langword="null"/>.</exception>
+    public ModinfoFinderCollection(IDirectoryInfo directory, MainModinfoFile? mainModinfo, IEnumerable<ModinfoVariantFile> variants)
+    {
+        if (variants == null)
+            throw new ArgumentNullException(nameof(variants));
+        Directory = directory ?? throw new ArgumentNullException(nameof(directory));
+        MainModinfo = mainModinfo;
+        Variants = variants.ToList();
+    }
+}