1 files changed, 82 insertions, 0 deletions
diff --git a/src/SMAPI/Framework/ModHelpers/ContentPackHelper.cs b/src/SMAPI/Framework/ModHelpers/ContentPackHelper.cs
new file mode 100644
index 00000000..c4b86cda
--- /dev/null
+++ b/src/SMAPI/Framework/ModHelpers/ContentPackHelper.cs
@@ -0,0 +1,82 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using StardewModdingAPI.Toolkit.Serialisation.Models;
+
+namespace StardewModdingAPI.Framework.ModHelpers
+{
+    /// <summary>Provides an API for managing content packs.</summary>
+    internal class ContentPackHelper : BaseHelper, IContentPackHelper
+    {
+        /*********
+        ** Properties
+        *********/
+        /// <summary>The content packs loaded for this mod.</summary>
+        private readonly Lazy<IContentPack[]> ContentPacks;
+
+        /// <summary>Create a temporary content pack.</summary>
+        private readonly Func<string, IManifest, IContentPack> CreateContentPack;
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="modID">The unique ID of the relevant mod.</param>
+        /// <param name="contentPacks">The content packs loaded for this mod.</param>
+        /// <param name="createContentPack">Create a temporary content pack.</param>
+        public ContentPackHelper(string modID, Lazy<IContentPack[]> contentPacks, Func<string, IManifest, IContentPack> createContentPack)
+            : base(modID)
+        {
+            this.ContentPacks = contentPacks;
+            this.CreateContentPack = createContentPack;
+        }
+
+        /// <summary>Get all content packs loaded for this mod.</summary>
+        public IEnumerable<IContentPack> GetOwned()
+        {
+            return this.ContentPacks.Value;
+        }
+
+        /// <summary>Create a temporary content pack to read files from a directory. This will generate fake manifest data; any <c>manifest.json</c> in the directory will be ignored. Temporary content packs will not appear in the SMAPI log and update checks will not be performed.</summary>
+        /// <param name="directoryPath">The absolute directory path containing the content pack files.</param>
+        public IContentPack CreateFake(string directoryPath)
+        {
+            string id = Guid.NewGuid().ToString("N");
+            return this.CreateFake(directoryPath, id, id, id, id, new SemanticVersion(1, 0, 0));
+        }
+
+        /// <summary>Create a temporary content pack to read files from a directory. Temporary content packs will not appear in the SMAPI log and update checks will not be performed.</summary>
+        /// <param name="directoryPath">The absolute directory path containing the content pack files.</param>
+        /// <param name="id">The content pack's unique ID.</param>
+        /// <param name="name">The content pack name.</param>
+        /// <param name="description">The content pack description.</param>
+        /// <param name="author">The content pack author's name.</param>
+        /// <param name="version">The content pack version.</param>
+        public IContentPack CreateFake(string directoryPath, string id, string name, string description, string author, ISemanticVersion version)
+        {
+            // validate
+            if (string.IsNullOrWhiteSpace(directoryPath))
+                throw new ArgumentNullException(nameof(directoryPath));
+            if (string.IsNullOrWhiteSpace(id))
+                throw new ArgumentNullException(nameof(id));
+            if (string.IsNullOrWhiteSpace(name))
+                throw new ArgumentNullException(nameof(name));
+            if (!Directory.Exists(directoryPath))
+                throw new ArgumentException($"Can't create content pack for directory path '{directoryPath}' because no such directory exists.");
+
+            // create manifest
+            IManifest manifest = new Manifest(
+                uniqueID: id,
+                name: name,
+                author: author,
+                description: description,
+                version: version,
+                contentPackFor: this.ModID
+            );
+
+            // create content pack
+            return this.CreateContentPack(directoryPath, manifest);
+        }
+    }
+}