77 lines
3.0 KiB
C#
77 lines
3.0 KiB
C#
|
using Microsoft.Extensions.DependencyInjection;
|
|||
|
|
using Microsoft.Extensions.Hosting;
|
|||
|
|
using Microsoft.EntityFrameworkCore;
|
|||
|
|
using System;
|
|||
|
|
using System.Threading;
|
|||
|
|
using System.Threading.Tasks;
|
|||
|
|
using Parking_space_WebAPI.Services;
|
|||
|
|
|
|||
|
|
public class ParkingUpdateService : BackgroundService
|
|||
|
|
{
|
|||
|
|
private readonly IServiceScopeFactory _scopeFactory;
|
|||
|
|
|
|||
|
|
public ParkingUpdateService(IServiceScopeFactory scopeFactory)
|
|||
|
|
{
|
|||
|
|
_scopeFactory = scopeFactory;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
|
|||
|
|
{
|
|||
|
|
while (!stoppingToken.IsCancellationRequested)
|
|||
|
|
{
|
|||
|
|
using (var scope = _scopeFactory.CreateScope())
|
|||
|
|
{
|
|||
|
|
var _context = scope.ServiceProvider.GetRequiredService<SqlContext>();
|
|||
|
|
|
|||
|
|
try
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
var yuntech_parking = await _context.yuntech_parking.FirstOrDefaultAsync();
|
|||
|
|
if (yuntech_parking != null)
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
if (Int32.TryParse(yuntech_parking.all_num, out int totalParkingSpaces))
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
var monthly_rent_data = await _context.yuntech_monthly_rent_number
|
|||
|
|
.FirstOrDefaultAsync(rent => rent.category == "月租");
|
|||
|
|
int monthlyRentNumber = 0;
|
|||
|
|
if (monthly_rent_data != null)
|
|||
|
|
{
|
|||
|
|
Int32.TryParse(monthly_rent_data.number, out monthlyRentNumber);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
var temporary_rent_data = await _context.yuntech_monthly_rent_number
|
|||
|
|
.FirstOrDefaultAsync(rent => rent.category == "臨停");
|
|||
|
|
int temporaryRentNumber = 0;
|
|||
|
|
if (temporary_rent_data != null)
|
|||
|
|
{
|
|||
|
|
Int32.TryParse(temporary_rent_data.number, out temporaryRentNumber);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
int totalOccupiedSpaces = monthlyRentNumber + Math.Abs(temporaryRentNumber); // 確保臨停車位數為絕對值
|
|||
|
|
int remainingSpaces = totalParkingSpaces - totalOccupiedSpaces;
|
|||
|
|
|
|||
|
|
// 確保剩餘車位數不為負數
|
|||
|
|
yuntech_parking.now_num = Math.Max(remainingSpaces, 0).ToString();
|
|||
|
|
|
|||
|
|
// 保存更改
|
|||
|
|
await _context.SaveChangesAsync();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
catch (Exception ex)
|
|||
|
|
{
|
|||
|
|
// 錯誤處理，這裡可以記錄錯誤或進行其他處理
|
|||
|
|
Console.WriteLine($"An error occurred: {ex.Message}");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 每 60 秒執行一次
|
|||
|
|
await Task.Delay(TimeSpan.FromMinutes(1), stoppingToken);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|