baseline: OpenMU upstream b5a0961 (fresh source)

src/GameLogic/PlayerActions/WarpAction.cs

@@ -0,0 +1,76 @@
+// <copyright file="WarpAction.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;
+
+using System.Diagnostics.CodeAnalysis;
+using MUnique.OpenMU.GameLogic.Attributes;
+using MUnique.OpenMU.GameLogic.Views;
+using MUnique.OpenMU.Interfaces;
+
+/// <summary>
+/// Action to warp to another place.
+/// </summary>
+public class WarpAction
+{
+    /// <summary>
+    /// Warps the player.
+    /// </summary>
+    /// <param name="player">The player.</param>
+    /// <param name="warpInfo">The warp information.</param>
+    public async ValueTask WarpToAsync(Player player, WarpInfo warpInfo)
+    {
+        if (this.CheckRequirements(player, warpInfo, out var errorMessage))
+        {
+            await player.WarpToAsync(warpInfo.Gate!).ConfigureAwait(false);
+        }
+        else
+        {
+            await player.ShowBlueMessageAsync(errorMessage).ConfigureAwait(false);
+        }
+    }
+
+    private bool CheckRequirements(Player player, WarpInfo warpInfo, [MaybeNullWhen(true)] out string errorMessage)
+    {
+        errorMessage = null;
+
+        var requirement = player.SelectedCharacter?.GetEffectiveMoveLevelRequirement(warpInfo.LevelRequirement);
+        if (requirement > player.Attributes?[Stats.Level])
+        {
+            errorMessage = $"You need to be level {requirement} in order to warp";
+            return false;
+        }
+
+        if (warpInfo.Gate?.Map is null)
+        {
+            errorMessage = "The warp target is not initialized";
+            return false;
+        }
+
+        if (warpInfo.Gate.Map.TryGetRequirementError(player, out var message))
+        {
+            errorMessage = message;
+            return false;
+        }
+
+        // Money check should be last to avoid getting zen when other checks failed
+        if (!this.CheckMoneyRequirement(player, warpInfo))
+        {
+            errorMessage = $"You need {warpInfo.Costs} in order to warp";
+            return false;
+        }
+
+        return true;
+    }
+
+    private bool CheckMoneyRequirement(Player player, WarpInfo warpInfo)
+    {
+        if (player.TryRemoveMoney(warpInfo.Costs))
+        {
+            return true;
+        }
+
+        return false;
+    }
+}