Merge branch 'develop' into stable

1 files changed, 56 insertions, 0 deletions

diff --git a/src/SMAPI/Events/InventoryChangedEventArgs.cs b/src/SMAPI/Events/InventoryChangedEventArgs.cs
new file mode 100644
index 00000000..a081611b
--- /dev/null
+++ b/src/SMAPI/Events/InventoryChangedEventArgs.cs
@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using StardewValley;
+
+namespace StardewModdingAPI.Events
+{
+    /// <summary>Event arguments for an <see cref="IPlayerEvents.InventoryChanged"/> event.</summary>
+    public class InventoryChangedEventArgs : EventArgs
+    {
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>The player whose inventory changed.</summary>
+        public Farmer Player { get; }
+
+        /// <summary>The added items.</summary>
+        public IEnumerable<Item> Added { get; }
+
+        /// <summary>The removed items.</summary>
+        public IEnumerable<Item> Removed { get; }
+
+        /// <summary>The items whose stack sizes changed, with the relative change.</summary>
+        public IEnumerable<ItemStackSizeChange> QuantityChanged { get; }
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="player">The player whose inventory changed.</param>
+        /// <param name="changedItems">The inventory changes.</param>
+        public InventoryChangedEventArgs(Farmer player, ItemStackChange[] changedItems)
+        {
+            this.Player = player;
+            this.Added = changedItems
+                .Where(n => n.ChangeType == ChangeType.Added)
+                .Select(p => p.Item)
+                .ToArray();
+
+            this.Removed = changedItems
+                .Where(n => n.ChangeType == ChangeType.Removed)
+                .Select(p => p.Item)
+                .ToArray();
+
+            this.QuantityChanged = changedItems
+                .Where(n => n.ChangeType == ChangeType.StackChange)
+                .Select(change => new ItemStackSizeChange(
+                    item: change.Item,
+                    oldSize: change.Item.Stack - change.StackChange,
+                    newSize: change.Item.Stack
+                ))
+                .ToArray();
+        }
+    }
+}