DataSourceAdapter-Pattern + SiteExportService schlanker + Page-Services Scoped

- IDataSourceAdapter mit 3 Implementierungen (HANA, SAP_GATEWAY, MANUAL_EXCEL) und DataSourceAdapterResolver ersetzen das if/else auf ConnectionKind. - SiteExportService von 338 auf 187 Zeilen reduziert: Pipeline Resolve -> Fetch -> Transform -> Excel -> Central -> SharePoint. - Page-Services auf Scoped (per Blazor-Circuit); Orchestrator bleibt Singleton fuer geteilten Export-Status.
2026-04-17 12:11:35 +00:00
parent 2a56ba53ba
commit 82ac7df0ec
11 changed files with 431 additions and 231 deletions
@@ -0,0 +1,71 @@
+using Microsoft.EntityFrameworkCore;
+using TrafagSalesExporter.Data;
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services.DataSources;
+
+public sealed class HanaDataSourceAdapter : IDataSourceAdapter
+{
+    private readonly IDbContextFactory<AppDbContext> _dbFactory;
+    private readonly IHanaQueryService _hanaService;
+    private readonly IAppEventLogService _appEventLogService;
+
+    public HanaDataSourceAdapter(
+        IDbContextFactory<AppDbContext> dbFactory,
+        IHanaQueryService hanaService,
+        IAppEventLogService appEventLogService)
+    {
+        _dbFactory = dbFactory;
+        _hanaService = hanaService;
+        _appEventLogService = appEventLogService;
+    }
+
+    public string ConnectionKind => SourceSystemConnectionKinds.Hana;
+
+    public async Task<DataSourceFetchResult> FetchAsync(DataSourceFetchContext context)
+    {
+        var site = context.Site;
+        var sourceDefinition = context.SourceDefinition;
+
+        using var db = await _dbFactory.CreateDbContextAsync();
+        var exportServer = await BuildEffectiveServerAsync(db, site, sourceDefinition);
+
+        context.UpdateStatus?.Invoke("HANA Abfrage...");
+        await _appEventLogService.WriteAsync("Export", "HANA Abfrage gestartet",
+            siteId: site.Id, land: site.Land,
+            details: exportServer.GetConnectionStringPreview());
+
+        var records = await Task.Run(() => _hanaService.GetSalesRecords(
+            exportServer, site.Schema, site.TSC, site.Land, context.Settings.DateFilter));
+
+        return new DataSourceFetchResult { Records = records };
+    }
+
+    private static async Task<HanaServer> BuildEffectiveServerAsync(
+        AppDbContext db, Site site, SourceSystemDefinition sourceDefinition)
+    {
+        var centralServer = await db.HanaServers
+            .AsNoTracking()
+            .OrderBy(x => x.Id)
+            .FirstOrDefaultAsync(x => x.SourceSystem == sourceDefinition.Code)
+            ?? throw new InvalidOperationException(
+                $"Fuer Quellsystem '{sourceDefinition.Code}' ist keine zentrale HANA-Konfiguration vorhanden.");
+
+        var credentials = DataSourceCredentials.Resolve(site, sourceDefinition);
+
+        return new HanaServer
+        {
+            Id = centralServer.Id,
+            SourceSystem = centralServer.SourceSystem,
+            Name = centralServer.Name,
+            Host = centralServer.Host,
+            Port = centralServer.Port,
+            Username = credentials.Username,
+            Password = credentials.Password,
+            DatabaseName = centralServer.DatabaseName,
+            UseSsl = centralServer.UseSsl,
+            ValidateCertificate = centralServer.ValidateCertificate,
+            AdditionalParams = centralServer.AdditionalParams
+        };
+    }
+}