baseline: OpenMU upstream b5a0961 (fresh source)

src/GameLogic/PlayerActions/ItemConsumeActions/BaseConsumeHandlerPlugIn.cs

@@ -0,0 +1,59 @@
+// -----------------------------------------------------------------------
+// <copyright file="BaseConsumeHandlerPlugIn.cs" company="MUnique">
+// Licensed under the MIT License. See LICENSE file in the project root for full license information.
+// </copyright>
+// -----------------------------------------------------------------------
+
+namespace MUnique.OpenMU.GameLogic.PlayerActions.ItemConsumeActions;
+
+/// <summary>
+/// Base class of an item consumption handler.
+/// </summary>
+public abstract class BaseConsumeHandlerPlugIn : IItemConsumeHandlerPlugIn
+{
+    /// <inheritdoc />
+    public abstract ItemIdentifier Key { get; }
+
+    /// <inheritdoc/>
+    public virtual async ValueTask<bool> ConsumeItemAsync(Player player, Item item, Item? targetItem, FruitUsage fruitUsage)
+    {
+        if (!this.CheckPreconditions(player, item))
+        {
+            return false;
+        }
+
+        await this.ConsumeSourceItemAsync(player, item).ConfigureAwait(false);
+
+        return true;
+    }
+
+    /// <summary>
+    /// Consumes the source item.
+    /// </summary>
+    /// <param name="player">The player.</param>
+    /// <param name="item">The item.</param>
+    protected async ValueTask ConsumeSourceItemAsync(Player player, Item item)
+    {
+        if (item.Durability > 0)
+        {
+            item.Durability -= 1;
+        }
+    }
+
+    /// <summary>
+    /// Checks the preconditions.
+    /// </summary>
+    /// <param name="player">The player.</param>
+    /// <param name="item">The item.</param>
+    /// <returns><c>True</c>, if preconditions are met.</returns>
+    protected virtual bool CheckPreconditions(Player player, Item item)
+    {
+        if (player.PlayerState.CurrentState != PlayerState.EnteredWorld
+            || item.Durability == 0)
+        {
+            return false;
+        }
+
+        return true;
+    }
+}