Kayori_MedusaPluginChargeMachine/MedusaPluginChargeMachine/Handlers/LA9/ChargeEaChargeHandler.cs

using System.Text.RegularExpressions;
using Abstractions.Entities;
using Abstractions.Handlers;
using Abstractions.SerializationTypes;
using Abstractions.Services;
using MedusaPluginChargeMachine.Entities;
using MedusaPluginChargeMachine.Models.Request;
using MedusaPluginChargeMachine.Models.Response;
using Microsoft.AspNetCore.Identity;
using ISessionService = MedusaPluginChargeMachine.Services.ISessionService;

namespace MedusaPluginChargeMachine.Handlers.LA9;

public partial class ChargeEaChargeHandler(
    ICardService cardService,
    ISessionService sessionService,
    UserManager<User> userManager,
    ChargeMachineDbContext db) : Handler<ChargeRequest, ChargeResponse>
{
    public override void Configure()
    {
        Module("eacharge");
        Method("charge");
    }

    // chargeid carries the actual denomination as e.g. "N10000P"
    // (Note/10000/Paseli) - chargenum is just the quantity of that
    // denomination being charged (normally "1" per bill inserted).
    [GeneratedRegex(@"^N(\d+)P$")]
    private static partial Regex ChargeIdPattern();

    public override async Task<ChargeResponse> HandleAsync(ChargeRequest req, GameModel model)
    {
        var match = ChargeIdPattern().Match(req.ChargeId);
        if (!match.Success)
            throw new InvalidOperationException($"Unrecognized chargeid format: '{req.ChargeId}'");

        var denomination = int.Parse(match.Groups[1].Value);
        var amount = denomination * int.Parse(req.ChargeNumber);

        var foundSession = sessionService.GetSession(req.SessionId);

        var card = await cardService.FindByCardId(foundSession.refId)!;

        card!.User.PaseliAmount += amount;

        await userManager.UpdateAsync(card.User);

        db.ChargeHistories.Add(new ChargeHistory
        {
            CardId = foundSession.refId,
            ChargeNum = int.Parse(req.ChargeNumber),
            ChargeAmount = amount,
            OrderDate = DateTime.UtcNow
        });
        await db.SaveChangesAsync();

        return new ChargeResponse
        {
            Status = 0,
            Balance = new XrpcInt(card.User.PaseliAmount),
            ChargeDailyLimit = new XrpcInt(100000),
            ChargeDaily = new XrpcInt(0),
            ChargePoint = new XrpcInt(amount)
        };
    }
}