1 files changed, 21 insertions, 0 deletions
diff --git a/src/StardewModdingAPI/Framework/InternalExtensions.cs b/src/StardewModdingAPI/Framework/InternalExtensions.cs
index 415785d9..c4bd2d35 100644
--- a/src/StardewModdingAPI/Framework/InternalExtensions.cs
+++ b/src/StardewModdingAPI/Framework/InternalExtensions.cs
@@ -86,5 +86,26 @@ namespace StardewModdingAPI.Framework
             // anything else
             return exception.ToString();
         }
+
+        /****
+        ** Deprecation
+        ****/
+        /// <summary>Log a deprecation warning for mods using an event.</summary>
+        /// <param name="deprecationManager">The deprecation manager to extend.</param>
+        /// <param name="handlers">The event handlers.</param>
+        /// <param name="nounPhrase">A noun phrase describing what is deprecated.</param>
+        /// <param name="version">The SMAPI version which deprecated it.</param>
+        /// <param name="severity">How deprecated the code is.</param>
+        public static void WarnForEvent(this DeprecationManager deprecationManager, Delegate[] handlers, string nounPhrase, string version, DeprecationLevel severity)
+        {
+            if (handlers == null || !handlers.Any())
+                return;
+
+            foreach (Delegate handler in handlers)
+            {
+                string modName = Program.ModRegistry.GetModFrom(handler) ?? "an unknown mod"; // suppress stack trace for unknown mods, not helpful here
+                deprecationManager.Warn(modName, nounPhrase, version, severity);
+            }
+        }
     }
 }