1 files changed, 79 insertions, 0 deletions
diff --git a/src/SMAPI.Mods.ErrorHandler/Patches/GameLocationPatcher.cs b/src/SMAPI.Mods.ErrorHandler/Patches/GameLocationPatcher.cs
new file mode 100644
index 00000000..7427fe48
--- /dev/null
+++ b/src/SMAPI.Mods.ErrorHandler/Patches/GameLocationPatcher.cs
@@ -0,0 +1,79 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using HarmonyLib;
+using StardewModdingAPI.Framework.Patching;
+using StardewValley;
+using xTile;
+
+namespace StardewModdingAPI.Mods.ErrorHandler.Patches
+{
+    /// <summary>Harmony patches for <see cref="GameLocation.checkEventPrecondition"/> and <see cref="GameLocation.updateSeasonalTileSheets"/> which intercept errors instead of crashing.</summary>
+    /// <remarks>Patch methods must be static for Harmony to work correctly. See the Harmony documentation before renaming patch arguments.</remarks>
+    [SuppressMessage("ReSharper", "InconsistentNaming", Justification = "Argument names are defined by Harmony and methods are named for clarity.")]
+    [SuppressMessage("ReSharper", "IdentifierTypo", Justification = "Argument names are defined by Harmony and methods are named for clarity.")]
+    internal class GameLocationPatcher : IHarmonyPatch
+    {
+        /*********
+        ** Fields
+        *********/
+        /// <summary>Writes messages to the console and log file on behalf of the game.</summary>
+        private static IMonitor MonitorForGame;
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="monitorForGame">Writes messages to the console and log file on behalf of the game.</param>
+        public GameLocationPatcher(IMonitor monitorForGame)
+        {
+            GameLocationPatcher.MonitorForGame = monitorForGame;
+        }
+
+        /// <inheritdoc />
+        public void Apply(Harmony harmony)
+        {
+            harmony.Patch(
+                original: AccessTools.Method(typeof(GameLocation), nameof(GameLocation.checkEventPrecondition)),
+                finalizer: new HarmonyMethod(this.GetType(), nameof(GameLocationPatcher.Finalize_GameLocation_CheckEventPrecondition))
+            );
+            harmony.Patch(
+                original: AccessTools.Method(typeof(GameLocation), nameof(GameLocation.updateSeasonalTileSheets)),
+                finalizer: new HarmonyMethod(this.GetType(), nameof(GameLocationPatcher.Before_GameLocation_UpdateSeasonalTileSheets))
+            );
+        }
+
+
+        /*********
+        ** Private methods
+        *********/
+        /// <summary>The method to call instead of GameLocation.checkEventPrecondition.</summary>
+        /// <param name="__result">The return value of the original method.</param>
+        /// <param name="precondition">The precondition to be parsed.</param>
+        /// <param name="__exception">The exception thrown by the wrapped method, if any.</param>
+        /// <returns>Returns the exception to throw, if any.</returns>
+        private static Exception Finalize_GameLocation_CheckEventPrecondition(ref int __result, string precondition, Exception __exception)
+        {
+            if (__exception != null)
+            {
+                __result = -1;
+                GameLocationPatcher.MonitorForGame.Log($"Failed parsing event precondition ({precondition}):\n{__exception.InnerException}", LogLevel.Error);
+            }
+
+            return null;
+        }
+
+        /// <summary>The method to call instead of <see cref="GameLocation.updateSeasonalTileSheets"/>.</summary>
+        /// <param name="__instance">The instance being patched.</param>
+        /// <param name="map">The map whose tilesheets to update.</param>
+        /// <param name="__exception">The exception thrown by the wrapped method, if any.</param>
+        /// <returns>Returns the exception to throw, if any.</returns>
+        private static Exception Before_GameLocation_UpdateSeasonalTileSheets(GameLocation __instance, Map map, Exception __exception)
+        {
+            if (__exception != null)
+                GameLocationPatcher.MonitorForGame.Log($"Failed updating seasonal tilesheets for location '{__instance.NameOrUniqueName}': \n{__exception}", LogLevel.Error);
+
+            return null;
+        }
+    }
+}