AdamuSw/src/GameLogic/PlayerActions/WarpAction.cs

// <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)
    {
        // ADAMU-CUSTOM: Castle Siege hunting-map access (Land of Trials, owner guild only).
        var (allowed, csError) = await CastleSiege.CastleSiegeMapAccess
            .CanEnterMapAsync(player, warpInfo.Gate?.Map?.Number ?? 0).ConfigureAwait(false);
        if (!allowed)
        {
            await player.ShowBlueMessageAsync(csError!).ConfigureAwait(false);
            return;
        }

        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;
    }
}