add Harmony 2.0 rewriters (#711)

1 files changed, 33 insertions, 0 deletions

diff --git a/src/SMAPI/Framework/RewriteFacades/HarmonyInstanceMethods.cs b/src/SMAPI/Framework/RewriteFacades/HarmonyInstanceMethods.cs
new file mode 100644
index 00000000..0f906f51
--- /dev/null
+++ b/src/SMAPI/Framework/RewriteFacades/HarmonyInstanceMethods.cs
@@ -0,0 +1,33 @@
+using System.Linq;
+using System.Reflection;
+using System.Reflection.Emit;
+using HarmonyLib;
+
+namespace StardewModdingAPI.Framework.RewriteFacades
+{
+    /// <summary>Maps Harmony 1.x methods to Harmony 2.x to avoid breaking older mods.</summary>
+    /// <remarks>This is public to support SMAPI rewriting and should not be referenced directly by mods.</remarks>
+    public class HarmonyInstanceMethods : Harmony
+    {
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="id">The unique patch identifier.</param>
+        public HarmonyInstanceMethods(string id)
+            : base(id) { }
+
+        /// <summary>Creates a new Harmony instance.</summary>
+        /// <param name="id">A unique identifier for the instance.</param>
+        public static Harmony Create(string id)
+        {
+            return new Harmony(id);
+        }
+
+        public DynamicMethod Patch(MethodBase original, HarmonyMethod prefix = null, HarmonyMethod postfix = null, HarmonyMethod transpiler = null)
+        {
+            MethodInfo method = base.Patch(original: original, prefix: prefix, postfix: postfix, transpiler: transpiler);
+            return new DynamicMethod(method.Name, method.Attributes, method.CallingConvention, method.ReturnType, method.GetParameters().Select(p => p.ParameterType).ToArray(), method.Module, true);
+        }
+    }
+}