umfangreiches refactoring

TrafagSalesExporter/Services/LogsPageService.cs

@@ -0,0 +1,69 @@
+using Microsoft.EntityFrameworkCore;
+using TrafagSalesExporter.Data;
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services;
+
+public interface ILogsPageService
+{
+    Task<LogsPageState> LoadAsync(string? filterLand, string? filterStatus, DateTime? filterDate);
+    Task<int> DeleteOldLogsAsync(int olderThanDays);
+}
+
+public sealed class LogsPageService : ILogsPageService
+{
+    private readonly IDbContextFactory<AppDbContext> _dbFactory;
+
+    public LogsPageService(IDbContextFactory<AppDbContext> dbFactory)
+    {
+        _dbFactory = dbFactory;
+    }
+
+    public async Task<LogsPageState> LoadAsync(string? filterLand, string? filterStatus, DateTime? filterDate)
+    {
+        await using var db = await _dbFactory.CreateDbContextAsync();
+
+        IQueryable<ExportLog> query = db.ExportLogs.OrderByDescending(l => l.Timestamp);
+
+        if (!string.IsNullOrEmpty(filterLand))
+            query = query.Where(l => l.Land == filterLand);
+
+        if (!string.IsNullOrEmpty(filterStatus))
+            query = query.Where(l => l.Status == filterStatus);
+
+        if (filterDate.HasValue)
+            query = query.Where(l => l.Timestamp.Date == filterDate.Value.Date);
+
+        IQueryable<AppEventLog> appLogQuery = db.AppEventLogs.OrderByDescending(l => l.Timestamp);
+
+        if (!string.IsNullOrEmpty(filterLand))
+            appLogQuery = appLogQuery.Where(l => l.Land == filterLand);
+
+        if (filterDate.HasValue)
+            appLogQuery = appLogQuery.Where(l => l.Timestamp.Date == filterDate.Value.Date);
+
+        return new LogsPageState
+        {
+            AvailableLands = await db.ExportLogs.Select(l => l.Land).Distinct().OrderBy(l => l).ToListAsync(),
+            Logs = await query.Take(500).ToListAsync(),
+            AppLogs = await appLogQuery.Take(500).ToListAsync()
+        };
+    }
+
+    public async Task<int> DeleteOldLogsAsync(int olderThanDays)
+    {
+        await using var db = await _dbFactory.CreateDbContextAsync();
+        var cutoff = DateTime.Now.AddDays(-olderThanDays);
+        var oldLogs = await db.ExportLogs.Where(l => l.Timestamp < cutoff).ToListAsync();
+        db.ExportLogs.RemoveRange(oldLogs);
+        await db.SaveChangesAsync();
+        return oldLogs.Count;
+    }
+}
+
+public sealed class LogsPageState
+{
+    public List<ExportLog> Logs { get; set; } = [];
+    public List<AppEventLog> AppLogs { get; set; } = [];
+    public List<string> AvailableLands { get; set; } = [];
+}