Second upload

WebApi_data_value/Program.cs

@@ -19,11 +19,9 @@ builder.Services.AddCors();
 builder.Services.AddControllers();
 
 //執行每日存取剩餘車位
-builder.Services.AddScoped<ExcelGenerationService>(); // ExcelGenerationService 註冊為 Scoped
-builder.Services.AddHostedService<DailyExcelGenerationService>(); // DailyExcelGenerationService 註冊為 HostedService
-
-
-// 註冊 BackgroundService
+builder.Services.AddScoped<ExcelGenerationService>(); // ExcelGenerationService 下載Excel
+builder.Services.AddHostedService<DailyExcelGenerationService>(); //  每天設定ExcelGenerationService 存取剩餘車位
+builder.Services.AddHostedService<ParkingLogCleanupService>(); //執行定期清除3個月前剩餘車位
 builder.Services.AddHostedService<ParkingUpdateService>();  //執行每一分鐘更新剩餘車位
 
 // 連線PostgreSQL資料庫

WebApi_data_value/Services/BackgroundService.cs

@@ -85,8 +85,8 @@ public class ParkingUpdateService : BackgroundService
                 }
             }
 
-            // 每分鐘執行一次
-            await Task.Delay(TimeSpan.FromMinutes(1), stoppingToken);
+            // 每 30 秒執行一次
+            await Task.Delay(TimeSpan.FromSeconds(30), stoppingToken);
         }
     }
 }

WebApi_data_value/Services/IHostedService.cs

@@ -23,7 +23,7 @@ namespace Parking_space_WebAPI.BackgroundServices
 
         public Task StartAsync(CancellationToken cancellationToken)
         {
-            TimeSpan scheduledTime = new TimeSpan(23, 59, 0);     //設定固定每天存取的時間
+            TimeSpan scheduledTime = new TimeSpan(0, 19, 0);     //設定固定每天存取的時間
             var now = DateTime.Now;
             var nextRunTime = DateTime.Today.Add(scheduledTime);
 

WebApi_data_value/Services/ParkingLogCleanupService.cs

@@ -0,0 +1,55 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Parking_space_WebAPI.Services;
+
+public class ParkingLogCleanupService : BackgroundService
+{
+    private readonly IServiceScopeFactory _scopeFactory;
+
+    public ParkingLogCleanupService(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
+                {
+                    // 計算三個月前的日期
+                    DateTime threeMonthsAgo = DateTime.Now.AddMonths(-3);
+
+                    // 查找三個月前的資料
+                    var oldLogs = await _context.ParkingLogs
+                        .Where(log => log.Timestamp < threeMonthsAgo)
+                        .ToListAsync();
+
+                    if (oldLogs.Any())
+                    {
+                        _context.ParkingLogs.RemoveRange(oldLogs);
+                        await _context.SaveChangesAsync();
+                        Console.WriteLine($"{oldLogs.Count} old parking logs deleted.");
+                    }
+                }
+                catch (Exception ex)
+                {
+                    // 錯誤顯示
+                    Console.WriteLine($"An error occurred during cleanup: {ex.Message}");
+                }
+            }
+
+            // 每 24 小時執行一次清理
+            await Task.Delay(TimeSpan.FromDays(1), stoppingToken);
+        }
+    }
+}