1 files changed, 54 insertions, 0 deletions
diff --git a/src/StardewModdingAPI.AssemblyRewriters/Finders/EventFinder.cs b/src/StardewModdingAPI.AssemblyRewriters/Finders/EventFinder.cs
new file mode 100644
index 00000000..359ca63e
--- /dev/null
+++ b/src/StardewModdingAPI.AssemblyRewriters/Finders/EventFinder.cs
@@ -0,0 +1,54 @@
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using StardewModdingAPI.AssemblyRewriters.Framework;
+
+namespace StardewModdingAPI.AssemblyRewriters.Finders
+{
+    /// <summary>Finds CIL instructions that reference a given event.</summary>
+    public sealed class EventFinder : BaseMethodFinder
+    {
+        /*********
+        ** Properties
+        *********/
+        /// <summary>The full type name for which to find references.</summary>
+        private readonly string FullTypeName;
+
+        /// <summary>The event name for which to find references.</summary>
+        private readonly string EventName;
+
+
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>A brief noun phrase indicating what the instruction finder matches.</summary>
+        public override string NounPhrase { get; }
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="fullTypeName">The full type name for which to find references.</param>
+        /// <param name="eventName">The event name for which to find references.</param>
+        public EventFinder(string fullTypeName, string eventName)
+        {
+            this.FullTypeName = fullTypeName;
+            this.EventName = eventName;
+            this.NounPhrase = $"obsolete {fullTypeName}.{eventName} event";
+        }
+
+
+        /*********
+        ** Protected methods
+        *********/
+        /// <summary>Get whether a method reference should be rewritten.</summary>
+        /// <param name="instruction">The IL instruction.</param>
+        /// <param name="methodRef">The method reference.</param>
+        /// <param name="platformChanged">Whether the mod was compiled on a different platform.</param>
+        protected override bool IsMatch(Instruction instruction, MethodReference methodRef, bool platformChanged)
+        {
+            return methodRef.DeclaringType.FullName == this.FullTypeName
+                && (methodRef.Name == "add_" + this.EventName || methodRef.Name == "remove_" + this.EventName);
+        }
+    }
+}