1 files changed, 45 insertions, 0 deletions
diff --git a/src/StardewModdingAPI/Framework/Content/AssetDataForDictionary.cs b/src/StardewModdingAPI/Framework/Content/AssetDataForDictionary.cs
new file mode 100644
index 00000000..e9b29b12
--- /dev/null
+++ b/src/StardewModdingAPI/Framework/Content/AssetDataForDictionary.cs
@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace StardewModdingAPI.Framework.Content
+{
+    /// <summary>Encapsulates access and changes to dictionary content being read from a data file.</summary>
+    internal class AssetDataForDictionary<TKey, TValue> : AssetData<IDictionary<TKey, TValue>>, IAssetDataForDictionary<TKey, TValue>
+    {
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="locale">The content's locale code, if the content is localised.</param>
+        /// <param name="assetName">The normalised asset name being read.</param>
+        /// <param name="data">The content data being read.</param>
+        /// <param name="getNormalisedPath">Normalises an asset key to match the cache key.</param>
+        public AssetDataForDictionary(string locale, string assetName, IDictionary<TKey, TValue> data, Func<string, string> getNormalisedPath)
+            : base(locale, assetName, data, getNormalisedPath) { }
+
+        /// <summary>Add or replace an entry in the dictionary.</summary>
+        /// <param name="key">The entry key.</param>
+        /// <param name="value">The entry value.</param>
+        public void Set(TKey key, TValue value)
+        {
+            this.Data[key] = value;
+        }
+
+        /// <summary>Add or replace an entry in the dictionary.</summary>
+        /// <param name="key">The entry key.</param>
+        /// <param name="value">A callback which accepts the current value and returns the new value.</param>
+        public void Set(TKey key, Func<TValue, TValue> value)
+        {
+            this.Data[key] = value(this.Data[key]);
+        }
+
+        /// <summary>Dynamically replace values in the dictionary.</summary>
+        /// <param name="replacer">A lambda which takes the current key and value for an entry, and returns the new value.</param>
+        public void Set(Func<TKey, TValue, TValue> replacer)
+        {
+            foreach (var pair in this.Data.ToArray())
+                this.Data[pair.Key] = replacer(pair.Key, pair.Value);
+        }
+    }
+}