1 files changed, 91 insertions, 0 deletions
diff --git a/src/StardewModdingAPI/Metadata/InstructionMetadata.cs b/src/StardewModdingAPI/Metadata/InstructionMetadata.cs
new file mode 100644
index 00000000..67fdc041
--- /dev/null
+++ b/src/StardewModdingAPI/Metadata/InstructionMetadata.cs
@@ -0,0 +1,91 @@
+using System.Collections.Generic;
+using Microsoft.Xna.Framework.Graphics;
+using StardewModdingAPI.Events;
+using StardewModdingAPI.Framework.ModLoading;
+using StardewModdingAPI.Framework.ModLoading.Finders;
+using StardewModdingAPI.Framework.ModLoading.Rewriters;
+using StardewModdingAPI.Framework.ModLoading.Rewriters.Wrappers;
+using StardewValley;
+
+namespace StardewModdingAPI.Metadata
+{
+    /// <summary>Provides CIL instruction handlers which rewrite mods for compatibility and throw exceptions for incompatible code.</summary>
+    internal class InstructionMetadata
+    {
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Get rewriters which detect or fix incompatible CIL instructions in mod assemblies.</summary>
+        public IEnumerable<IInstructionRewriter> GetRewriters()
+        {
+            return new IInstructionRewriter[]
+            {
+                /****
+                ** Finders throw an exception when incompatible code is found.
+                ****/
+                // changes in Stardew Valley 1.2 (with no rewriters)
+                new FieldFinder("StardewValley.Item", "set_Name"),
+
+                // APIs removed in SMAPI 1.9
+                new TypeFinder("StardewModdingAPI.Advanced.ConfigFile"),
+                new TypeFinder("StardewModdingAPI.Advanced.IConfigFile"),
+                new TypeFinder("StardewModdingAPI.Entities.SPlayer"),
+                new TypeFinder("StardewModdingAPI.Extensions"),
+                new TypeFinder("StardewModdingAPI.Inheritance.SGame"),
+                new TypeFinder("StardewModdingAPI.Inheritance.SObject"),
+                new TypeFinder("StardewModdingAPI.LogWriter"),
+                new TypeFinder("StardewModdingAPI.Manifest"),
+                new TypeFinder("StardewModdingAPI.Version"),
+                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "DrawDebug"),
+                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "DrawTick"),
+                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "OnPostRenderHudEventNoCheck"),
+                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "OnPostRenderGuiEventNoCheck"),
+                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "OnPreRenderHudEventNoCheck"),
+                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "OnPreRenderGuiEventNoCheck"),
+
+                // APIs removed in SMAPI 2.0
+#if !SMAPI_1_x
+                new TypeFinder("StardewModdingAPI.Command"),
+                new TypeFinder("StardewModdingAPI.Config"),
+                new TypeFinder("StardewModdingAPI.Log"),
+                new EventFinder("StardewModdingAPI.Events.GameEvents", "Initialize"),
+                new EventFinder("StardewModdingAPI.Events.GameEvents", "LoadContent"),
+                new EventFinder("StardewModdingAPI.Events.GameEvents", "GameLoaded"),
+                new EventFinder("StardewModdingAPI.Events.GameEvents", "FirstUpdateTick"),
+                new EventFinder("StardewModdingAPI.Events.PlayerEvents", "LoadedGame"),
+                new EventFinder("StardewModdingAPI.Events.PlayerEvents", "FarmerChanged"),
+                new EventFinder("StardewModdingAPI.Events.TimeEvents", "DayOfMonthChanged"),
+                new EventFinder("StardewModdingAPI.Events.TimeEvents", "YearOfGameChanged"),
+                new EventFinder("StardewModdingAPI.Events.TimeEvents", "SeasonOfYearChanged"),
+                new EventFinder("StardewModdingAPI.Events.TimeEvents", "OnNewDay"),
+                new TypeFinder("StardewModdingAPI.Events.EventArgsCommand"),
+                new TypeFinder("StardewModdingAPI.Events.EventArgsFarmerChanged"),
+                new TypeFinder("StardewModdingAPI.Events.EventArgsLoadedGameChanged"),
+                new TypeFinder("StardewModdingAPI.Events.EventArgsNewDay"),
+                new TypeFinder("StardewModdingAPI.Events.EventArgsStringChanged"),
+                new PropertyFinder("StardewModdingAPI.Mod", "PathOnDisk"),
+                new PropertyFinder("StardewModdingAPI.Mod", "BaseConfigPath"),
+                new PropertyFinder("StardewModdingAPI.Mod", "PerSaveConfigFolder"),
+                new PropertyFinder("StardewModdingAPI.Mod", "PerSaveConfigPath"),
+#endif
+
+                /****
+                ** Rewriters change CIL as needed to fix incompatible code
+                ****/
+                // crossplatform
+                new MethodParentRewriter(typeof(SpriteBatch), typeof(SpriteBatchWrapper), onlyIfPlatformChanged: true),
+
+                // Stardew Valley 1.2
+                new FieldToPropertyRewriter(typeof(Game1), nameof(Game1.activeClickableMenu)),
+                new FieldToPropertyRewriter(typeof(Game1), nameof(Game1.currentMinigame)),
+                new FieldToPropertyRewriter(typeof(Game1), nameof(Game1.gameMode)),
+                new FieldToPropertyRewriter(typeof(Game1), nameof(Game1.player)),
+                new FieldReplaceRewriter(typeof(Game1), "borderFont", nameof(Game1.smallFont)),
+                new FieldReplaceRewriter(typeof(Game1), "smoothFont", nameof(Game1.smallFont)),
+
+                // SMAPI 1.9
+                new TypeReferenceRewriter("StardewModdingAPI.Inheritance.ItemStackChange", typeof(ItemStackChange))
+            };
+        }
+    }
+}