import exxport settings, join over sap hana tables

TrafagSalesExporter/Components/App.razor

@@ -14,5 +14,6 @@
     <Routes @rendermode="@Microsoft.AspNetCore.Components.Web.RenderMode.InteractiveServer" />
     <script src="_framework/blazor.web.js"></script>
     <script src="_content/MudBlazor/MudBlazor.min.js"></script>
+    <script src="js/download.js"></script>
 </body>
 </html>

TrafagSalesExporter/Components/Pages/Dashboard.razor

@@ -116,7 +116,9 @@
                 Land = s.Land,
                 TSC = s.TSC,
                 Schema = s.Schema,
-                ServerName = s.HanaServer?.Name ?? "",
+                ServerName = string.Equals(s.SourceSystem, "SAP", StringComparison.OrdinalIgnoreCase)
+                    ? (string.IsNullOrWhiteSpace(s.SapServiceUrl) ? "SAP Gateway" : s.SapServiceUrl)
+                    : s.HanaServer?.Name ?? "",
                 LastStatus = log?.Status ?? "",
                 RowCount = log?.RowCount ?? 0,
                 LastRun = log?.Timestamp,

TrafagSalesExporter/Components/Pages/Settings.razor

@@ -8,12 +8,39 @@
 @inject TimerBackgroundService TimerService
 @inject IHanaQueryService HanaService
 @inject ISapGatewayService SapGatewayService
+@inject IConfigTransferService ConfigTransferService
+@inject IJSRuntime JS
 @inject ISnackbar Snackbar
 
 <PageTitle>Settings</PageTitle>
 
 <MudText Typo="Typo.h4" Class="mb-4">Settings</MudText>
 
+<MudText Typo="Typo.h5" Class="mb-2">Konfiguration Import/Export</MudText>
+<MudPaper Class="pa-4 mb-6" Elevation="1">
+    <MudGrid>
+        <MudItem xs="12" md="6">
+            <MudCheckBox @bind-Value="_includeSecretsInExport" Label="Mit Secrets exportieren" />
+            <MudText Typo="Typo.caption">
+                Wenn deaktiviert, bleiben Passwörter und Secrets beim Export leer. Beim Import ohne Secrets werden bestehende Secrets auf dem Zielsystem beibehalten.
+            </MudText>
+        </MudItem>
+        <MudItem xs="12" md="6">
+            <MudStack Row Spacing="2">
+                <MudButton Variant="Variant.Filled" Color="Color.Primary" OnClick="ExportConfiguration"
+                           StartIcon="@Icons.Material.Filled.Download" Disabled="_exportingConfig">
+                    @(_exportingConfig ? "Exportiere..." : "Konfiguration exportieren")
+                </MudButton>
+                <MudButton Variant="Variant.Outlined" Color="Color.Warning" HtmlTag="label"
+                           StartIcon="@Icons.Material.Filled.UploadFile" Disabled="_importingConfig">
+                    @(_importingConfig ? "Importiere..." : "Konfiguration importieren")
+                    <InputFile OnChange="ImportConfiguration" accept=".json,application/json" style="display:none" />
+                </MudButton>
+            </MudStack>
+        </MudItem>
+    </MudGrid>
+</MudPaper>
+
 @* SharePoint Config *@
 <MudText Typo="Typo.h5" Class="mb-2">SharePoint Konfiguration</MudText>
 <MudPaper Class="pa-4 mb-6" Elevation="1">
@@ -166,6 +193,9 @@
     private SharePointConfig _spConfig = new();
     private ExportSettings _exportSettings = new();
     private bool _testingSp;
+    private bool _includeSecretsInExport;
+    private bool _exportingConfig;
+    private bool _importingConfig;
     private readonly HashSet<string> _testingSystems = [];
 
     protected override async Task OnInitializedAsync()
@@ -240,6 +270,60 @@
         Snackbar.Add("Export Einstellungen gespeichert", Severity.Success);
     }
 
+    private async Task ExportConfiguration()
+    {
+        if (_exportingConfig)
+            return;
+
+        _exportingConfig = true;
+        try
+        {
+            var json = await ConfigTransferService.ExportJsonAsync(_includeSecretsInExport);
+            var suffix = _includeSecretsInExport ? "with-secrets" : "without-secrets";
+            var fileName = $"trafag-config-{DateTime.UtcNow:yyyyMMdd-HHmmss}-{suffix}.json";
+            await JS.InvokeVoidAsync("trafagDownload.saveTextFile", fileName, json, "application/json;charset=utf-8");
+            Snackbar.Add("Konfiguration exportiert", Severity.Success);
+        }
+        catch (Exception ex)
+        {
+            Snackbar.Add($"Export fehlgeschlagen: {ex.Message}", Severity.Error);
+        }
+        finally
+        {
+            _exportingConfig = false;
+        }
+    }
+
+    private async Task ImportConfiguration(InputFileChangeEventArgs args)
+    {
+        if (_importingConfig)
+            return;
+
+        _importingConfig = true;
+        try
+        {
+            var file = args.File;
+            await using var stream = file.OpenReadStream(5 * 1024 * 1024);
+            using var reader = new StreamReader(stream);
+            var json = await reader.ReadToEndAsync();
+            await ConfigTransferService.ImportJsonAsync(json);
+
+            using var db = await DbFactory.CreateDbContextAsync();
+            _spConfig = await db.SharePointConfigs.FirstOrDefaultAsync() ?? new SharePointConfig();
+            _exportSettings = await db.ExportSettings.FirstOrDefaultAsync() ?? new ExportSettings();
+            TimerService.Recalculate();
+            Snackbar.Add("Konfiguration importiert", Severity.Success);
+        }
+        catch (Exception ex)
+        {
+            Snackbar.Add($"Import fehlgeschlagen: {ex.Message}", Severity.Error);
+        }
+        finally
+        {
+            _importingConfig = false;
+        }
+    }
+
     private async Task TestCentralCredentials(string sourceSystem)
     {
         if (sourceSystem == "SAP")

TrafagSalesExporter/Components/Pages/Standorte.razor

@@ -1,6 +1,7 @@
 @page "/standorte"
 @using Microsoft.EntityFrameworkCore
 @using System.Text.Json
+@using System.Reflection
 @using TrafagSalesExporter.Data
 @using TrafagSalesExporter.Models
 @using TrafagSalesExporter.Services
@@ -180,12 +181,110 @@
                     </MudText>
                 }
             </MudStack>
-            <MudSelect @bind-Value="_editingSite.SapEntitySet" Label="SAP Entity Set" Required>
-                @foreach (var entitySet in _sapEntitySetsCache)
-                {
-                    <MudSelectItem Value="@entitySet">@entitySet</MudSelectItem>
-                }
-            </MudSelect>
+            <MudDivider Class="my-4" />
+            <MudStack Row Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-2">
+                <MudText Typo="Typo.h6">SAP Quellen</MudText>
+                <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Add" OnClick="AddSapSource">Quelle hinzufügen</MudButton>
+            </MudStack>
+            <MudText Typo="Typo.caption" Class="mb-2">
+                Pro Quelle Alias und Entity Set definieren. Joins verwenden links/rechts kommagetrennte Schlüsselfelder wie `VBELN,POSNR`. Feldmappings erwarten `Alias.Feldname` oder Konstanten wie `=SAP`.
+            </MudText>
+            <MudTable Items="_sapSources" Dense Hover Striped>
+                <HeaderContent>
+                    <MudTh>Alias</MudTh>
+                    <MudTh>Entity Set</MudTh>
+                    <MudTh>Primär</MudTh>
+                    <MudTh>Aktiv</MudTh>
+                    <MudTh>Aktionen</MudTh>
+                </HeaderContent>
+                <RowTemplate>
+                    <MudTd><MudTextField @bind-Value="context.Alias" Dense /></MudTd>
+                    <MudTd>
+                        <MudSelect @bind-Value="context.EntitySet" Dense>
+                            @foreach (var entitySet in _sapEntitySetsCache)
+                            {
+                                <MudSelectItem Value="@entitySet">@entitySet</MudSelectItem>
+                            }
+                        </MudSelect>
+                    </MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsPrimary" Dense /></MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsActive" Dense /></MudTd>
+                    <MudTd><MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error" Size="Size.Small" OnClick="() => RemoveSapSource(context)" /></MudTd>
+                </RowTemplate>
+            </MudTable>
+
+            <MudDivider Class="my-4" />
+            <MudStack Row Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-2">
+                <MudText Typo="Typo.h6">SAP Joins</MudText>
+                <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Add" OnClick="AddSapJoin">Join hinzufügen</MudButton>
+            </MudStack>
+            <MudTable Items="_sapJoins" Dense Hover Striped>
+                <HeaderContent>
+                    <MudTh>Links</MudTh>
+                    <MudTh>Left Keys</MudTh>
+                    <MudTh>Rechts</MudTh>
+                    <MudTh>Right Keys</MudTh>
+                    <MudTh>Typ</MudTh>
+                    <MudTh>Aktiv</MudTh>
+                    <MudTh>Aktionen</MudTh>
+                </HeaderContent>
+                <RowTemplate>
+                    <MudTd>
+                        <MudSelect @bind-Value="context.LeftAlias" Dense>
+                            @foreach (var alias in GetSapAliases())
+                            {
+                                <MudSelectItem Value="@alias">@alias</MudSelectItem>
+                            }
+                        </MudSelect>
+                    </MudTd>
+                    <MudTd><MudTextField @bind-Value="context.LeftKeys" Dense Placeholder="VBELN,POSNR" /></MudTd>
+                    <MudTd>
+                        <MudSelect @bind-Value="context.RightAlias" Dense>
+                            @foreach (var alias in GetSapAliases())
+                            {
+                                <MudSelectItem Value="@alias">@alias</MudSelectItem>
+                            }
+                        </MudSelect>
+                    </MudTd>
+                    <MudTd><MudTextField @bind-Value="context.RightKeys" Dense Placeholder="VBELN,POSNR" /></MudTd>
+                    <MudTd>
+                        <MudSelect @bind-Value="context.JoinType" Dense>
+                            <MudSelectItem Value="@("Left")">Left</MudSelectItem>
+                        </MudSelect>
+                    </MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsActive" Dense /></MudTd>
+                    <MudTd><MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error" Size="Size.Small" OnClick="() => RemoveSapJoin(context)" /></MudTd>
+                </RowTemplate>
+            </MudTable>
+
+            <MudDivider Class="my-4" />
+            <MudStack Row Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-2">
+                <MudText Typo="Typo.h6">Feldmappings ins zentrale Schema</MudText>
+                <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Add" OnClick="AddSapMapping">Mapping hinzufügen</MudButton>
+            </MudStack>
+            <MudTable Items="_sapMappings" Dense Hover Striped>
+                <HeaderContent>
+                    <MudTh>Zielfeld</MudTh>
+                    <MudTh>Source Expression</MudTh>
+                    <MudTh>Pflicht</MudTh>
+                    <MudTh>Aktiv</MudTh>
+                    <MudTh>Aktionen</MudTh>
+                </HeaderContent>
+                <RowTemplate>
+                    <MudTd>
+                        <MudSelect @bind-Value="context.TargetField" Dense>
+                            @foreach (var field in _salesRecordFields)
+                            {
+                                <MudSelectItem Value="@field">@field</MudSelectItem>
+                            }
+                        </MudSelect>
+                    </MudTd>
+                    <MudTd><MudTextField @bind-Value="context.SourceExpression" Dense Placeholder="VBAK.VBELN oder =SAP" /></MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsRequired" Dense /></MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsActive" Dense /></MudTd>
+                    <MudTd><MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error" Size="Size.Small" OnClick="() => RemoveSapMapping(context)" /></MudTd>
+                </RowTemplate>
+            </MudTable>
         }
         else
         {
@@ -222,6 +321,13 @@
     private List<HanaServer> _servers = new();
     private List<Site> _sites = new();
     private List<string> _sapEntitySetsCache = [];
+    private List<SapSourceDefinition> _sapSources = [];
+    private List<SapJoinDefinition> _sapJoins = [];
+    private List<SapFieldMapping> _sapMappings = [];
+    private readonly string[] _salesRecordFields = typeof(SalesRecord)
+        .GetProperties(BindingFlags.Public | BindingFlags.Instance)
+        .Select(p => p.Name)
+        .ToArray();
     private HanaServer _editingServer = new();
     private Site _editingSite = new();
     private HanaServer _editingSiteServer = new();
@@ -348,9 +454,12 @@
         {
             IsActive = true,
             SourceSystem = "SAP",
-            HanaServerId = 0
+            HanaServerId = null
         };
         _sapEntitySetsCache = [];
+        _sapSources = [];
+        _sapJoins = [];
+        _sapMappings = [];
         _editingSiteServer = CreateDefaultSiteServer();
         _siteDialogVisible = true;
     }
@@ -374,6 +483,10 @@
             IsActive = site.IsActive
         };
         _sapEntitySetsCache = ParseSapEntitySets(site.SapEntitySetsCache);
+        using var db = DbFactory.CreateDbContext();
+        _sapSources = db.SapSourceDefinitions.Where(s => s.SiteId == site.Id).OrderBy(s => s.SortOrder).ThenBy(s => s.Id).ToList();
+        _sapJoins = db.SapJoinDefinitions.Where(j => j.SiteId == site.Id).OrderBy(j => j.SortOrder).ThenBy(j => j.Id).ToList();
+        _sapMappings = db.SapFieldMappings.Where(m => m.SiteId == site.Id).OrderBy(m => m.SortOrder).ThenBy(m => m.Id).ToList();
         _editingSiteServer = site.HanaServer is null
             ? CreateDefaultSiteServer(site)
             : CloneServer(site.HanaServer);
@@ -418,6 +531,7 @@
             }
 
             await db.SaveChangesAsync();
+            await SaveSapConfigurationAsync(db, _editingSite.Id);
             _siteDialogVisible = false;
             await LoadDataAsync();
             Snackbar.Add("Standort gespeichert", Severity.Success);
@@ -445,6 +559,14 @@
         var entity = await db.Sites.FindAsync(site.Id);
         if (entity is not null)
         {
+            var sources = await db.SapSourceDefinitions.Where(s => s.SiteId == site.Id).ToListAsync();
+            var joins = await db.SapJoinDefinitions.Where(j => j.SiteId == site.Id).ToListAsync();
+            var mappings = await db.SapFieldMappings.Where(m => m.SiteId == site.Id).ToListAsync();
+            var centralRows = await db.CentralSalesRecords.Where(r => r.SiteId == site.Id).ToListAsync();
+            if (sources.Count > 0) db.SapSourceDefinitions.RemoveRange(sources);
+            if (joins.Count > 0) db.SapJoinDefinitions.RemoveRange(joins);
+            if (mappings.Count > 0) db.SapFieldMappings.RemoveRange(mappings);
+            if (centralRows.Count > 0) db.CentralSalesRecords.RemoveRange(centralRows);
             db.Sites.Remove(entity);
             await db.SaveChangesAsync();
         }
@@ -632,4 +754,97 @@
 
     private static string SerializeSapEntitySets(List<string> entitySets)
         => JsonSerializer.Serialize(entitySets);
+
+    private void AddSapSource()
+    {
+        _sapSources.Add(new SapSourceDefinition
+        {
+            Alias = $"SRC{_sapSources.Count + 1}",
+            EntitySet = _sapEntitySetsCache.FirstOrDefault() ?? string.Empty,
+            IsActive = true,
+            IsPrimary = _sapSources.Count == 0,
+            SortOrder = _sapSources.Count
+        });
+    }
+
+    private void RemoveSapSource(SapSourceDefinition source)
+    {
+        _sapSources.Remove(source);
+    }
+
+    private void AddSapJoin()
+    {
+        _sapJoins.Add(new SapJoinDefinition
+        {
+            JoinType = "Left",
+            IsActive = true,
+            SortOrder = _sapJoins.Count
+        });
+    }
+
+    private void RemoveSapJoin(SapJoinDefinition join)
+    {
+        _sapJoins.Remove(join);
+    }
+
+    private void AddSapMapping()
+    {
+        _sapMappings.Add(new SapFieldMapping
+        {
+            TargetField = _salesRecordFields.First(),
+            IsActive = true,
+            SortOrder = _sapMappings.Count
+        });
+    }
+
+    private void RemoveSapMapping(SapFieldMapping mapping)
+    {
+        _sapMappings.Remove(mapping);
+    }
+
+    private IEnumerable<string> GetSapAliases()
+        => _sapSources.Where(s => !string.IsNullOrWhiteSpace(s.Alias)).Select(s => s.Alias).Distinct(StringComparer.OrdinalIgnoreCase);
+
+    private async Task SaveSapConfigurationAsync(AppDbContext db, int siteId)
+    {
+        var oldSources = await db.SapSourceDefinitions.Where(s => s.SiteId == siteId).ToListAsync();
+        var oldJoins = await db.SapJoinDefinitions.Where(j => j.SiteId == siteId).ToListAsync();
+        var oldMappings = await db.SapFieldMappings.Where(m => m.SiteId == siteId).ToListAsync();
+        if (oldSources.Count > 0) db.SapSourceDefinitions.RemoveRange(oldSources);
+        if (oldJoins.Count > 0) db.SapJoinDefinitions.RemoveRange(oldJoins);
+        if (oldMappings.Count > 0) db.SapFieldMappings.RemoveRange(oldMappings);
+
+        if (IsSapSite())
+        {
+            NormalizeSapConfigCollections();
+            foreach (var source in _sapSources)
+                source.SiteId = siteId;
+            foreach (var join in _sapJoins)
+                join.SiteId = siteId;
+            foreach (var mapping in _sapMappings)
+                mapping.SiteId = siteId;
+            db.SapSourceDefinitions.AddRange(_sapSources);
+            db.SapJoinDefinitions.AddRange(_sapJoins);
+            db.SapFieldMappings.AddRange(_sapMappings);
+        }
+
+        await db.SaveChangesAsync();
+    }
+
+    private void NormalizeSapConfigCollections()
+    {
+        for (var i = 0; i < _sapSources.Count; i++)
+            _sapSources[i].SortOrder = i;
+        for (var i = 0; i < _sapJoins.Count; i++)
+            _sapJoins[i].SortOrder = i;
+        for (var i = 0; i < _sapMappings.Count; i++)
+            _sapMappings[i].SortOrder = i;
+
+        var selectedPrimaryIndex = _sapSources.FindIndex(s => s.IsPrimary);
+        var primarySource = selectedPrimaryIndex >= 0 ? _sapSources[selectedPrimaryIndex] : _sapSources.FirstOrDefault();
+        foreach (var source in _sapSources)
+            source.IsPrimary = primarySource is not null && ReferenceEquals(source, primarySource);
+        if (_sapSources.Count > 0 && _sapSources.All(s => !s.IsPrimary))
+            _sapSources[0].IsPrimary = true;
+    }
 }

TrafagSalesExporter/Data/AppDbContext.cs

@@ -13,4 +13,8 @@ public class AppDbContext : DbContext
     public DbSet<ExportSettings> ExportSettings => Set<ExportSettings>();
     public DbSet<ExportLog> ExportLogs => Set<ExportLog>();
     public DbSet<FieldTransformationRule> FieldTransformationRules => Set<FieldTransformationRule>();
+    public DbSet<SapSourceDefinition> SapSourceDefinitions => Set<SapSourceDefinition>();
+    public DbSet<SapJoinDefinition> SapJoinDefinitions => Set<SapJoinDefinition>();
+    public DbSet<SapFieldMapping> SapFieldMappings => Set<SapFieldMapping>();
+    public DbSet<CentralSalesRecord> CentralSalesRecords => Set<CentralSalesRecord>();
 }

TrafagSalesExporter/Models/CentralSalesRecord.cs

@@ -0,0 +1,41 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace TrafagSalesExporter.Models;
+
+public class CentralSalesRecord
+{
+    public int Id { get; set; }
+    public DateTime StoredAtUtc { get; set; }
+    public int SiteId { get; set; }
+
+    [ForeignKey(nameof(SiteId))]
+    public Site? Site { get; set; }
+
+    public string SourceSystem { get; set; } = string.Empty;
+    public DateTime ExtractionDate { get; set; }
+    public string Tsc { get; set; } = string.Empty;
+    public string InvoiceNumber { get; set; } = string.Empty;
+    public int PositionOnInvoice { get; set; }
+    public string Material { get; set; } = string.Empty;
+    public string Name { get; set; } = string.Empty;
+    public string ProductGroup { get; set; } = string.Empty;
+    public decimal Quantity { get; set; }
+    public string SupplierNumber { get; set; } = string.Empty;
+    public string SupplierName { get; set; } = string.Empty;
+    public string SupplierCountry { get; set; } = string.Empty;
+    public string CustomerNumber { get; set; } = string.Empty;
+    public string CustomerName { get; set; } = string.Empty;
+    public string CustomerCountry { get; set; } = string.Empty;
+    public string CustomerIndustry { get; set; } = string.Empty;
+    public decimal StandardCost { get; set; }
+    public string StandardCostCurrency { get; set; } = string.Empty;
+    public string PurchaseOrderNumber { get; set; } = string.Empty;
+    public decimal SalesPriceValue { get; set; }
+    public string SalesCurrency { get; set; } = string.Empty;
+    public string Incoterms2020 { get; set; } = string.Empty;
+    public string SalesResponsibleEmployee { get; set; } = string.Empty;
+    public DateTime? InvoiceDate { get; set; }
+    public DateTime? OrderDate { get; set; }
+    public string Land { get; set; } = string.Empty;
+    public string DocumentType { get; set; } = string.Empty;
+}

TrafagSalesExporter/Models/ConfigTransferPackage.cs

@@ -0,0 +1,102 @@
+namespace TrafagSalesExporter.Models;
+
+public class ConfigTransferPackage
+{
+    public int Version { get; set; } = 1;
+    public DateTime ExportedAtUtc { get; set; } = DateTime.UtcNow;
+    public bool IncludesSecrets { get; set; }
+    public ConfigTransferSharePoint? SharePointConfig { get; set; }
+    public ConfigTransferExportSettings? ExportSettings { get; set; }
+    public List<ConfigTransferHanaServer> HanaServers { get; set; } = [];
+    public List<ConfigTransferSite> Sites { get; set; } = [];
+    public List<FieldTransformationRule> FieldTransformationRules { get; set; } = [];
+    public List<ConfigTransferSapSourceDefinition> SapSourceDefinitions { get; set; } = [];
+    public List<ConfigTransferSapJoinDefinition> SapJoinDefinitions { get; set; } = [];
+    public List<ConfigTransferSapFieldMapping> SapFieldMappings { get; set; } = [];
+}
+
+public class ConfigTransferSharePoint
+{
+    public string SiteUrl { get; set; } = string.Empty;
+    public string ExportFolder { get; set; } = string.Empty;
+    public string TenantId { get; set; } = string.Empty;
+    public string ClientId { get; set; } = string.Empty;
+    public string? ClientSecret { get; set; }
+}
+
+public class ConfigTransferExportSettings
+{
+    public string DateFilter { get; set; } = "2025-01-01";
+    public int TimerHour { get; set; } = 3;
+    public int TimerMinute { get; set; }
+    public bool TimerEnabled { get; set; } = true;
+    public string? SapUsername { get; set; }
+    public string? SapPassword { get; set; }
+    public string? Bi1Username { get; set; }
+    public string? Bi1Password { get; set; }
+    public string? SageUsername { get; set; }
+    public string? SagePassword { get; set; }
+}
+
+public class ConfigTransferHanaServer
+{
+    public string Key { get; set; } = Guid.NewGuid().ToString("N");
+    public string Name { get; set; } = string.Empty;
+    public string Host { get; set; } = string.Empty;
+    public int Port { get; set; } = 30015;
+    public string? Username { get; set; }
+    public string? Password { get; set; }
+    public string DatabaseName { get; set; } = string.Empty;
+    public bool UseSsl { get; set; }
+    public bool ValidateCertificate { get; set; }
+    public string AdditionalParams { get; set; } = string.Empty;
+}
+
+public class ConfigTransferSite
+{
+    public string Key { get; set; } = Guid.NewGuid().ToString("N");
+    public string? HanaServerKey { get; set; }
+    public string Schema { get; set; } = string.Empty;
+    public string TSC { get; set; } = string.Empty;
+    public string Land { get; set; } = string.Empty;
+    public string SourceSystem { get; set; } = "SAP";
+    public string? UsernameOverride { get; set; }
+    public string? PasswordOverride { get; set; }
+    public string SapServiceUrl { get; set; } = string.Empty;
+    public string SapEntitySet { get; set; } = string.Empty;
+    public string SapEntitySetsCache { get; set; } = string.Empty;
+    public DateTime? SapEntitySetsRefreshedAtUtc { get; set; }
+    public bool IsActive { get; set; } = true;
+}
+
+public class ConfigTransferSapSourceDefinition
+{
+    public string SiteKey { get; set; } = string.Empty;
+    public string Alias { get; set; } = string.Empty;
+    public string EntitySet { get; set; } = string.Empty;
+    public bool IsPrimary { get; set; }
+    public bool IsActive { get; set; } = true;
+    public int SortOrder { get; set; }
+}
+
+public class ConfigTransferSapJoinDefinition
+{
+    public string SiteKey { get; set; } = string.Empty;
+    public string LeftAlias { get; set; } = string.Empty;
+    public string RightAlias { get; set; } = string.Empty;
+    public string LeftKeys { get; set; } = string.Empty;
+    public string RightKeys { get; set; } = string.Empty;
+    public string JoinType { get; set; } = "Left";
+    public bool IsActive { get; set; } = true;
+    public int SortOrder { get; set; }
+}
+
+public class ConfigTransferSapFieldMapping
+{
+    public string SiteKey { get; set; } = string.Empty;
+    public string TargetField { get; set; } = string.Empty;
+    public string SourceExpression { get; set; } = string.Empty;
+    public bool IsRequired { get; set; }
+    public bool IsActive { get; set; } = true;
+    public int SortOrder { get; set; }
+}

TrafagSalesExporter/Models/SapFieldMapping.cs

@@ -0,0 +1,26 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace TrafagSalesExporter.Models;
+
+public class SapFieldMapping
+{
+    public int Id { get; set; }
+
+    public int SiteId { get; set; }
+
+    [ForeignKey(nameof(SiteId))]
+    public Site? Site { get; set; }
+
+    [Required]
+    public string TargetField { get; set; } = nameof(SalesRecord.Material);
+
+    [Required]
+    public string SourceExpression { get; set; } = string.Empty;
+
+    public bool IsRequired { get; set; }
+
+    public bool IsActive { get; set; } = true;
+
+    public int SortOrder { get; set; }
+}

TrafagSalesExporter/Models/SapJoinDefinition.cs

@@ -0,0 +1,32 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace TrafagSalesExporter.Models;
+
+public class SapJoinDefinition
+{
+    public int Id { get; set; }
+
+    public int SiteId { get; set; }
+
+    [ForeignKey(nameof(SiteId))]
+    public Site? Site { get; set; }
+
+    [Required]
+    public string LeftAlias { get; set; } = string.Empty;
+
+    [Required]
+    public string RightAlias { get; set; } = string.Empty;
+
+    [Required]
+    public string LeftKeys { get; set; } = string.Empty;
+
+    [Required]
+    public string RightKeys { get; set; } = string.Empty;
+
+    public string JoinType { get; set; } = "Left";
+
+    public bool IsActive { get; set; } = true;
+
+    public int SortOrder { get; set; }
+}

TrafagSalesExporter/Models/SapSourceDefinition.cs

@@ -0,0 +1,26 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace TrafagSalesExporter.Models;
+
+public class SapSourceDefinition
+{
+    public int Id { get; set; }
+
+    public int SiteId { get; set; }
+
+    [ForeignKey(nameof(SiteId))]
+    public Site? Site { get; set; }
+
+    [Required]
+    public string Alias { get; set; } = string.Empty;
+
+    [Required]
+    public string EntitySet { get; set; } = string.Empty;
+
+    public bool IsPrimary { get; set; }
+
+    public bool IsActive { get; set; } = true;
+
+    public int SortOrder { get; set; }
+}

TrafagSalesExporter/Program.cs

@@ -17,6 +17,7 @@ builder.Services.AddSingleton<IHanaQueryService, HanaQueryService>();
 builder.Services.AddSingleton<IExcelExportService, ExcelExportService>();
 builder.Services.AddSingleton<ISharePointUploadService, SharePointUploadService>();
 builder.Services.AddSingleton<ISapGatewayService, SapGatewayService>();
+builder.Services.AddSingleton<ISapCompositionService, SapCompositionService>();
 builder.Services.AddSingleton<ITransformationStrategy, CopyTransformationStrategy>();
 builder.Services.AddSingleton<ITransformationStrategy, UppercaseTransformationStrategy>();
 builder.Services.AddSingleton<ITransformationStrategy, LowercaseTransformationStrategy>();
@@ -28,6 +29,8 @@ builder.Services.AddSingleton<IRecordTransformationService, RecordTransformation
 builder.Services.AddSingleton<ISiteExportService, SiteExportService>();
 builder.Services.AddSingleton<IConsolidatedExportService, ConsolidatedExportService>();
 builder.Services.AddSingleton<IExportLogService, ExportLogService>();
+builder.Services.AddSingleton<ICentralSalesRecordService, CentralSalesRecordService>();
+builder.Services.AddSingleton<IConfigTransferService, ConfigTransferService>();
 builder.Services.AddSingleton<IDatabaseInitializationService, DatabaseInitializationService>();
 builder.Services.AddSingleton<ExportOrchestrationService>();
 builder.Services.AddSingleton<TimerBackgroundService>();

TrafagSalesExporter/Services/CentralSalesRecordService.cs

@@ -0,0 +1,97 @@
+using Microsoft.EntityFrameworkCore;
+using TrafagSalesExporter.Data;
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services;
+
+public class CentralSalesRecordService : ICentralSalesRecordService
+{
+    private readonly IDbContextFactory<AppDbContext> _dbFactory;
+
+    public CentralSalesRecordService(IDbContextFactory<AppDbContext> dbFactory)
+    {
+        _dbFactory = dbFactory;
+    }
+
+    public async Task ReplaceForSiteAsync(Site site, IEnumerable<SalesRecord> records)
+    {
+        using var db = await _dbFactory.CreateDbContextAsync();
+        var existing = await db.CentralSalesRecords.Where(r => r.SiteId == site.Id).ToListAsync();
+        if (existing.Count > 0)
+            db.CentralSalesRecords.RemoveRange(existing);
+
+        var sourceSystem = string.IsNullOrWhiteSpace(site.SourceSystem) ? "SAP" : site.SourceSystem;
+        db.CentralSalesRecords.AddRange(records.Select(record => new CentralSalesRecord
+        {
+            StoredAtUtc = DateTime.UtcNow,
+            SiteId = site.Id,
+            SourceSystem = sourceSystem,
+            ExtractionDate = record.ExtractionDate,
+            Tsc = record.Tsc,
+            InvoiceNumber = record.InvoiceNumber,
+            PositionOnInvoice = record.PositionOnInvoice,
+            Material = record.Material,
+            Name = record.Name,
+            ProductGroup = record.ProductGroup,
+            Quantity = record.Quantity,
+            SupplierNumber = record.SupplierNumber,
+            SupplierName = record.SupplierName,
+            SupplierCountry = record.SupplierCountry,
+            CustomerNumber = record.CustomerNumber,
+            CustomerName = record.CustomerName,
+            CustomerCountry = record.CustomerCountry,
+            CustomerIndustry = record.CustomerIndustry,
+            StandardCost = record.StandardCost,
+            StandardCostCurrency = record.StandardCostCurrency,
+            PurchaseOrderNumber = record.PurchaseOrderNumber,
+            SalesPriceValue = record.SalesPriceValue,
+            SalesCurrency = record.SalesCurrency,
+            Incoterms2020 = record.Incoterms2020,
+            SalesResponsibleEmployee = record.SalesResponsibleEmployee,
+            InvoiceDate = record.InvoiceDate,
+            OrderDate = record.OrderDate,
+            Land = record.Land,
+            DocumentType = record.DocumentType
+        }));
+
+        await db.SaveChangesAsync();
+    }
+
+    public async Task<List<SalesRecord>> GetAllAsync()
+    {
+        using var db = await _dbFactory.CreateDbContextAsync();
+        return await db.CentralSalesRecords
+            .OrderBy(r => r.Land)
+            .ThenBy(r => r.Tsc)
+            .Select(r => new SalesRecord
+            {
+                ExtractionDate = r.ExtractionDate,
+                Tsc = r.Tsc,
+                InvoiceNumber = r.InvoiceNumber,
+                PositionOnInvoice = r.PositionOnInvoice,
+                Material = r.Material,
+                Name = r.Name,
+                ProductGroup = r.ProductGroup,
+                Quantity = r.Quantity,
+                SupplierNumber = r.SupplierNumber,
+                SupplierName = r.SupplierName,
+                SupplierCountry = r.SupplierCountry,
+                CustomerNumber = r.CustomerNumber,
+                CustomerName = r.CustomerName,
+                CustomerCountry = r.CustomerCountry,
+                CustomerIndustry = r.CustomerIndustry,
+                StandardCost = r.StandardCost,
+                StandardCostCurrency = r.StandardCostCurrency,
+                PurchaseOrderNumber = r.PurchaseOrderNumber,
+                SalesPriceValue = r.SalesPriceValue,
+                SalesCurrency = r.SalesCurrency,
+                Incoterms2020 = r.Incoterms2020,
+                SalesResponsibleEmployee = r.SalesResponsibleEmployee,
+                InvoiceDate = r.InvoiceDate,
+                OrderDate = r.OrderDate,
+                Land = r.Land,
+                DocumentType = r.DocumentType
+            })
+            .ToListAsync();
+    }
+}

TrafagSalesExporter/Services/ConfigTransferService.cs

@@ -0,0 +1,317 @@
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using TrafagSalesExporter.Data;
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services;
+
+public class ConfigTransferService : IConfigTransferService
+{
+    private readonly IDbContextFactory<AppDbContext> _dbFactory;
+    private static readonly JsonSerializerOptions JsonOptions = new() { WriteIndented = true };
+
+    public ConfigTransferService(IDbContextFactory<AppDbContext> dbFactory)
+    {
+        _dbFactory = dbFactory;
+    }
+
+    public async Task<string> ExportJsonAsync(bool includeSecrets)
+    {
+        using var db = await _dbFactory.CreateDbContextAsync();
+        var sharePoint = await db.SharePointConfigs.FirstOrDefaultAsync();
+        var exportSettings = await db.ExportSettings.FirstOrDefaultAsync();
+        var hanaServers = await db.HanaServers.OrderBy(x => x.Name).ToListAsync();
+        var sites = await db.Sites.OrderBy(x => x.Land).ToListAsync();
+        var rules = await db.FieldTransformationRules.OrderBy(x => x.SortOrder).ThenBy(x => x.Id).ToListAsync();
+        var sapSources = await db.SapSourceDefinitions.OrderBy(x => x.SortOrder).ThenBy(x => x.Id).ToListAsync();
+        var sapJoins = await db.SapJoinDefinitions.OrderBy(x => x.SortOrder).ThenBy(x => x.Id).ToListAsync();
+        var sapMappings = await db.SapFieldMappings.OrderBy(x => x.SortOrder).ThenBy(x => x.Id).ToListAsync();
+
+        var serverKeyMap = hanaServers.ToDictionary(x => x.Id, _ => Guid.NewGuid().ToString("N"));
+        var siteKeyMap = sites.ToDictionary(x => x.Id, _ => Guid.NewGuid().ToString("N"));
+
+        var package = new ConfigTransferPackage
+        {
+            IncludesSecrets = includeSecrets,
+            SharePointConfig = sharePoint is null ? null : new ConfigTransferSharePoint
+            {
+                SiteUrl = sharePoint.SiteUrl,
+                ExportFolder = sharePoint.ExportFolder,
+                TenantId = sharePoint.TenantId,
+                ClientId = sharePoint.ClientId,
+                ClientSecret = includeSecrets ? sharePoint.ClientSecret : null
+            },
+            ExportSettings = exportSettings is null ? null : new ConfigTransferExportSettings
+            {
+                DateFilter = exportSettings.DateFilter,
+                TimerHour = exportSettings.TimerHour,
+                TimerMinute = exportSettings.TimerMinute,
+                TimerEnabled = exportSettings.TimerEnabled,
+                SapUsername = includeSecrets ? exportSettings.SapUsername : null,
+                SapPassword = includeSecrets ? exportSettings.SapPassword : null,
+                Bi1Username = includeSecrets ? exportSettings.Bi1Username : null,
+                Bi1Password = includeSecrets ? exportSettings.Bi1Password : null,
+                SageUsername = includeSecrets ? exportSettings.SageUsername : null,
+                SagePassword = includeSecrets ? exportSettings.SagePassword : null
+            },
+            HanaServers = hanaServers.Select(server => new ConfigTransferHanaServer
+            {
+                Key = serverKeyMap[server.Id],
+                Name = server.Name,
+                Host = server.Host,
+                Port = server.Port,
+                Username = includeSecrets ? server.Username : null,
+                Password = includeSecrets ? server.Password : null,
+                DatabaseName = server.DatabaseName,
+                UseSsl = server.UseSsl,
+                ValidateCertificate = server.ValidateCertificate,
+                AdditionalParams = server.AdditionalParams
+            }).ToList(),
+            Sites = sites.Select(site => new ConfigTransferSite
+            {
+                Key = siteKeyMap[site.Id],
+                HanaServerKey = site.HanaServerId.HasValue && serverKeyMap.TryGetValue(site.HanaServerId.Value, out var serverKey) ? serverKey : null,
+                Schema = site.Schema,
+                TSC = site.TSC,
+                Land = site.Land,
+                SourceSystem = site.SourceSystem,
+                UsernameOverride = includeSecrets ? site.UsernameOverride : null,
+                PasswordOverride = includeSecrets ? site.PasswordOverride : null,
+                SapServiceUrl = site.SapServiceUrl,
+                SapEntitySet = site.SapEntitySet,
+                SapEntitySetsCache = site.SapEntitySetsCache,
+                SapEntitySetsRefreshedAtUtc = site.SapEntitySetsRefreshedAtUtc,
+                IsActive = site.IsActive
+            }).ToList(),
+            FieldTransformationRules = rules.Select(r => new FieldTransformationRule
+            {
+                SourceSystem = r.SourceSystem,
+                SourceField = r.SourceField,
+                TargetField = r.TargetField,
+                TransformationType = r.TransformationType,
+                Argument = r.Argument,
+                SortOrder = r.SortOrder,
+                IsActive = r.IsActive
+            }).ToList(),
+            SapSourceDefinitions = sapSources.Select(s => new ConfigTransferSapSourceDefinition
+            {
+                SiteKey = siteKeyMap[s.SiteId],
+                Alias = s.Alias,
+                EntitySet = s.EntitySet,
+                IsPrimary = s.IsPrimary,
+                IsActive = s.IsActive,
+                SortOrder = s.SortOrder
+            }).ToList(),
+            SapJoinDefinitions = sapJoins.Select(j => new ConfigTransferSapJoinDefinition
+            {
+                SiteKey = siteKeyMap[j.SiteId],
+                LeftAlias = j.LeftAlias,
+                RightAlias = j.RightAlias,
+                LeftKeys = j.LeftKeys,
+                RightKeys = j.RightKeys,
+                JoinType = j.JoinType,
+                IsActive = j.IsActive,
+                SortOrder = j.SortOrder
+            }).ToList(),
+            SapFieldMappings = sapMappings.Select(m => new ConfigTransferSapFieldMapping
+            {
+                SiteKey = siteKeyMap[m.SiteId],
+                TargetField = m.TargetField,
+                SourceExpression = m.SourceExpression,
+                IsRequired = m.IsRequired,
+                IsActive = m.IsActive,
+                SortOrder = m.SortOrder
+            }).ToList()
+        };
+
+        return JsonSerializer.Serialize(package, JsonOptions);
+    }
+
+    public async Task ImportJsonAsync(string json)
+    {
+        var package = JsonSerializer.Deserialize<ConfigTransferPackage>(json, JsonOptions)
+            ?? throw new InvalidOperationException("Konfigurationsdatei konnte nicht gelesen werden.");
+
+        using var db = await _dbFactory.CreateDbContextAsync();
+        var existingSharePoint = await db.SharePointConfigs.FirstOrDefaultAsync();
+        var existingSettings = await db.ExportSettings.FirstOrDefaultAsync();
+        var existingServers = await db.HanaServers.ToListAsync();
+        var existingSites = await db.Sites.ToListAsync();
+        var existingRules = await db.FieldTransformationRules.ToListAsync();
+        var existingSapSources = await db.SapSourceDefinitions.ToListAsync();
+        var existingSapJoins = await db.SapJoinDefinitions.ToListAsync();
+        var existingSapMappings = await db.SapFieldMappings.ToListAsync();
+        var existingCentralRecords = await db.CentralSalesRecords.ToListAsync();
+
+        var preservedSharePointSecret = existingSharePoint?.ClientSecret ?? string.Empty;
+        var preservedSecrets = existingSettings is null
+            ? new ConfigTransferExportSettings()
+            : new ConfigTransferExportSettings
+            {
+                SapUsername = existingSettings.SapUsername,
+                SapPassword = existingSettings.SapPassword,
+                Bi1Username = existingSettings.Bi1Username,
+                Bi1Password = existingSettings.Bi1Password,
+                SageUsername = existingSettings.SageUsername,
+                SagePassword = existingSettings.SagePassword
+            };
+        var preservedServerSecrets = existingServers.ToDictionary(
+            x => BuildServerSignature(x.Name, x.Host, x.Port, x.DatabaseName),
+            x => (x.Username, x.Password));
+        var preservedSiteSecrets = existingSites.ToDictionary(
+            x => BuildSiteSignature(x.Land, x.TSC, x.Schema, x.SourceSystem),
+            x => (x.UsernameOverride, x.PasswordOverride));
+
+        if (existingSapMappings.Count > 0) db.SapFieldMappings.RemoveRange(existingSapMappings);
+        if (existingSapJoins.Count > 0) db.SapJoinDefinitions.RemoveRange(existingSapJoins);
+        if (existingSapSources.Count > 0) db.SapSourceDefinitions.RemoveRange(existingSapSources);
+        if (existingRules.Count > 0) db.FieldTransformationRules.RemoveRange(existingRules);
+        if (existingCentralRecords.Count > 0) db.CentralSalesRecords.RemoveRange(existingCentralRecords);
+        if (existingSites.Count > 0) db.Sites.RemoveRange(existingSites);
+        if (existingServers.Count > 0) db.HanaServers.RemoveRange(existingServers);
+        if (existingSharePoint is not null) db.SharePointConfigs.Remove(existingSharePoint);
+        if (existingSettings is not null) db.ExportSettings.Remove(existingSettings);
+        await db.SaveChangesAsync();
+
+        var newSharePoint = package.SharePointConfig is null ? new SharePointConfig() : new SharePointConfig
+        {
+            SiteUrl = package.SharePointConfig.SiteUrl,
+            ExportFolder = package.SharePointConfig.ExportFolder,
+            TenantId = package.SharePointConfig.TenantId,
+            ClientId = package.SharePointConfig.ClientId,
+            ClientSecret = package.IncludesSecrets ? package.SharePointConfig.ClientSecret ?? string.Empty : preservedSharePointSecret
+        };
+        db.SharePointConfigs.Add(newSharePoint);
+
+        var importedSettings = package.ExportSettings ?? new ConfigTransferExportSettings();
+        db.ExportSettings.Add(new ExportSettings
+        {
+            DateFilter = importedSettings.DateFilter,
+            TimerHour = importedSettings.TimerHour,
+            TimerMinute = importedSettings.TimerMinute,
+            TimerEnabled = importedSettings.TimerEnabled,
+            SapUsername = package.IncludesSecrets ? importedSettings.SapUsername ?? string.Empty : preservedSecrets.SapUsername ?? string.Empty,
+            SapPassword = package.IncludesSecrets ? importedSettings.SapPassword ?? string.Empty : preservedSecrets.SapPassword ?? string.Empty,
+            Bi1Username = package.IncludesSecrets ? importedSettings.Bi1Username ?? string.Empty : preservedSecrets.Bi1Username ?? string.Empty,
+            Bi1Password = package.IncludesSecrets ? importedSettings.Bi1Password ?? string.Empty : preservedSecrets.Bi1Password ?? string.Empty,
+            SageUsername = package.IncludesSecrets ? importedSettings.SageUsername ?? string.Empty : preservedSecrets.SageUsername ?? string.Empty,
+            SagePassword = package.IncludesSecrets ? importedSettings.SagePassword ?? string.Empty : preservedSecrets.SagePassword ?? string.Empty
+        });
+
+        var serverIdMap = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
+        foreach (var server in package.HanaServers)
+        {
+            preservedServerSecrets.TryGetValue(BuildServerSignature(server.Name, server.Host, server.Port, server.DatabaseName), out var preserved);
+            var entity = new HanaServer
+            {
+                Name = server.Name,
+                Host = server.Host,
+                Port = server.Port,
+                Username = package.IncludesSecrets ? server.Username ?? string.Empty : preserved.Username ?? string.Empty,
+                Password = package.IncludesSecrets ? server.Password ?? string.Empty : preserved.Password ?? string.Empty,
+                DatabaseName = server.DatabaseName,
+                UseSsl = server.UseSsl,
+                ValidateCertificate = server.ValidateCertificate,
+                AdditionalParams = server.AdditionalParams
+            };
+            db.HanaServers.Add(entity);
+            await db.SaveChangesAsync();
+            serverIdMap[server.Key] = entity.Id;
+        }
+
+        var siteIdMap = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
+        foreach (var site in package.Sites)
+        {
+            preservedSiteSecrets.TryGetValue(BuildSiteSignature(site.Land, site.TSC, site.Schema, site.SourceSystem), out var preserved);
+            var entity = new Site
+            {
+                HanaServerId = !string.IsNullOrWhiteSpace(site.HanaServerKey) && serverIdMap.TryGetValue(site.HanaServerKey, out var mappedServerId)
+                    ? mappedServerId
+                    : null,
+                Schema = site.Schema,
+                TSC = site.TSC,
+                Land = site.Land,
+                SourceSystem = site.SourceSystem,
+                UsernameOverride = package.IncludesSecrets ? site.UsernameOverride ?? string.Empty : preserved.UsernameOverride ?? string.Empty,
+                PasswordOverride = package.IncludesSecrets ? site.PasswordOverride ?? string.Empty : preserved.PasswordOverride ?? string.Empty,
+                SapServiceUrl = site.SapServiceUrl,
+                SapEntitySet = site.SapEntitySet,
+                SapEntitySetsCache = site.SapEntitySetsCache,
+                SapEntitySetsRefreshedAtUtc = site.SapEntitySetsRefreshedAtUtc,
+                IsActive = site.IsActive
+            };
+            db.Sites.Add(entity);
+            await db.SaveChangesAsync();
+            siteIdMap[site.Key] = entity.Id;
+        }
+
+        if (package.FieldTransformationRules.Count > 0)
+        {
+            db.FieldTransformationRules.AddRange(package.FieldTransformationRules.Select(r => new FieldTransformationRule
+            {
+                SourceSystem = r.SourceSystem,
+                SourceField = r.SourceField,
+                TargetField = r.TargetField,
+                TransformationType = r.TransformationType,
+                Argument = r.Argument,
+                SortOrder = r.SortOrder,
+                IsActive = r.IsActive
+            }));
+        }
+
+        if (package.SapSourceDefinitions.Count > 0)
+        {
+            db.SapSourceDefinitions.AddRange(package.SapSourceDefinitions
+                .Where(x => siteIdMap.ContainsKey(x.SiteKey))
+                .Select(x => new SapSourceDefinition
+                {
+                    SiteId = siteIdMap[x.SiteKey],
+                    Alias = x.Alias,
+                    EntitySet = x.EntitySet,
+                    IsPrimary = x.IsPrimary,
+                    IsActive = x.IsActive,
+                    SortOrder = x.SortOrder
+                }));
+        }
+
+        if (package.SapJoinDefinitions.Count > 0)
+        {
+            db.SapJoinDefinitions.AddRange(package.SapJoinDefinitions
+                .Where(x => siteIdMap.ContainsKey(x.SiteKey))
+                .Select(x => new SapJoinDefinition
+                {
+                    SiteId = siteIdMap[x.SiteKey],
+                    LeftAlias = x.LeftAlias,
+                    RightAlias = x.RightAlias,
+                    LeftKeys = x.LeftKeys,
+                    RightKeys = x.RightKeys,
+                    JoinType = x.JoinType,
+                    IsActive = x.IsActive,
+                    SortOrder = x.SortOrder
+                }));
+        }
+
+        if (package.SapFieldMappings.Count > 0)
+        {
+            db.SapFieldMappings.AddRange(package.SapFieldMappings
+                .Where(x => siteIdMap.ContainsKey(x.SiteKey))
+                .Select(x => new SapFieldMapping
+                {
+                    SiteId = siteIdMap[x.SiteKey],
+                    TargetField = x.TargetField,
+                    SourceExpression = x.SourceExpression,
+                    IsRequired = x.IsRequired,
+                    IsActive = x.IsActive,
+                    SortOrder = x.SortOrder
+                }));
+        }
+
+        await db.SaveChangesAsync();
+    }
+
+    private static string BuildServerSignature(string name, string host, int port, string databaseName)
+        => $"{name}|{host}|{port}|{databaseName}".ToUpperInvariant();
+
+    private static string BuildSiteSignature(string land, string tsc, string schema, string sourceSystem)
+        => $"{land}|{tsc}|{schema}|{sourceSystem}".ToUpperInvariant();
+}

TrafagSalesExporter/Services/ConsolidatedExportService.cs

@@ -7,22 +7,26 @@ namespace TrafagSalesExporter.Services;
 public class ConsolidatedExportService : IConsolidatedExportService
 {
     private readonly IDbContextFactory<AppDbContext> _dbFactory;
+    private readonly ICentralSalesRecordService _centralSalesRecordService;
     private readonly IExcelExportService _excelService;
     private readonly ISharePointUploadService _sharePointService;
 
     public ConsolidatedExportService(
         IDbContextFactory<AppDbContext> dbFactory,
+        ICentralSalesRecordService centralSalesRecordService,
         IExcelExportService excelService,
         ISharePointUploadService sharePointService)
     {
         _dbFactory = dbFactory;
+        _centralSalesRecordService = centralSalesRecordService;
         _excelService = excelService;
         _sharePointService = sharePointService;
     }
 
     public async Task<string?> ExportAsync(List<SalesRecord> records)
     {
-        if (records.Count == 0)
+        var consolidatedRecords = await _centralSalesRecordService.GetAllAsync();
+        if (consolidatedRecords.Count == 0)
             return null;
 
         using var db = await _dbFactory.CreateDbContextAsync();
@@ -31,7 +35,7 @@ public class ConsolidatedExportService : IConsolidatedExportService
         var consolidatedPath = _excelService.CreateConsolidatedExcelFile(
             outputDir,
             DateTime.UtcNow.Date,
-            records
+            consolidatedRecords
                 .OrderBy(r => r.Land)
                 .ThenBy(r => r.Tsc)
                 .ThenByDescending(r => r.InvoiceDate ?? DateTime.MinValue)

TrafagSalesExporter/Services/DatabaseInitializationService.cs

@@ -43,6 +43,10 @@ public class DatabaseInitializationService : IDatabaseInitializationService
         AddColumnIfMissing(db, "ExportSettings", "SageUsername", "TEXT NOT NULL DEFAULT ''");
         AddColumnIfMissing(db, "ExportSettings", "SagePassword", "TEXT NOT NULL DEFAULT ''");
         EnsureTransformationTable(db);
+        EnsureSapSourceTable(db);
+        EnsureSapJoinTable(db);
+        EnsureSapFieldMappingTable(db);
+        EnsureCentralSalesRecordTable(db);
     }
 
     private static void EnsureSitesTableSupportsOptionalHanaServer(AppDbContext db)
@@ -193,6 +197,115 @@ CREATE TABLE IF NOT EXISTS FieldTransformationRules (
         cmd.ExecuteNonQuery();
     }
 
+    private static void EnsureSapSourceTable(AppDbContext db)
+    {
+        var conn = db.Database.GetDbConnection();
+        if (conn.State != ConnectionState.Open)
+            conn.Open();
+
+        using var cmd = conn.CreateCommand();
+        cmd.CommandText = @"
+CREATE TABLE IF NOT EXISTS SapSourceDefinitions (
+    Id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    SiteId INTEGER NOT NULL,
+    Alias TEXT NOT NULL,
+    EntitySet TEXT NOT NULL,
+    IsPrimary INTEGER NOT NULL DEFAULT 0,
+    IsActive INTEGER NOT NULL DEFAULT 1,
+    SortOrder INTEGER NOT NULL DEFAULT 0,
+    FOREIGN KEY (SiteId) REFERENCES Sites (Id)
+);";
+        cmd.ExecuteNonQuery();
+    }
+
+    private static void EnsureSapJoinTable(AppDbContext db)
+    {
+        var conn = db.Database.GetDbConnection();
+        if (conn.State != ConnectionState.Open)
+            conn.Open();
+
+        using var cmd = conn.CreateCommand();
+        cmd.CommandText = @"
+CREATE TABLE IF NOT EXISTS SapJoinDefinitions (
+    Id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    SiteId INTEGER NOT NULL,
+    LeftAlias TEXT NOT NULL,
+    RightAlias TEXT NOT NULL,
+    LeftKeys TEXT NOT NULL,
+    RightKeys TEXT NOT NULL,
+    JoinType TEXT NOT NULL DEFAULT 'Left',
+    IsActive INTEGER NOT NULL DEFAULT 1,
+    SortOrder INTEGER NOT NULL DEFAULT 0,
+    FOREIGN KEY (SiteId) REFERENCES Sites (Id)
+);";
+        cmd.ExecuteNonQuery();
+    }
+
+    private static void EnsureSapFieldMappingTable(AppDbContext db)
+    {
+        var conn = db.Database.GetDbConnection();
+        if (conn.State != ConnectionState.Open)
+            conn.Open();
+
+        using var cmd = conn.CreateCommand();
+        cmd.CommandText = @"
+CREATE TABLE IF NOT EXISTS SapFieldMappings (
+    Id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    SiteId INTEGER NOT NULL,
+    TargetField TEXT NOT NULL,
+    SourceExpression TEXT NOT NULL,
+    IsRequired INTEGER NOT NULL DEFAULT 0,
+    IsActive INTEGER NOT NULL DEFAULT 1,
+    SortOrder INTEGER NOT NULL DEFAULT 0,
+    FOREIGN KEY (SiteId) REFERENCES Sites (Id)
+);";
+        cmd.ExecuteNonQuery();
+    }
+
+    private static void EnsureCentralSalesRecordTable(AppDbContext db)
+    {
+        var conn = db.Database.GetDbConnection();
+        if (conn.State != ConnectionState.Open)
+            conn.Open();
+
+        using var cmd = conn.CreateCommand();
+        cmd.CommandText = @"
+CREATE TABLE IF NOT EXISTS CentralSalesRecords (
+    Id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    StoredAtUtc TEXT NOT NULL,
+    SiteId INTEGER NOT NULL,
+    SourceSystem TEXT NOT NULL,
+    ExtractionDate TEXT NOT NULL,
+    Tsc TEXT NOT NULL,
+    InvoiceNumber TEXT NOT NULL,
+    PositionOnInvoice INTEGER NOT NULL,
+    Material TEXT NOT NULL,
+    Name TEXT NOT NULL,
+    ProductGroup TEXT NOT NULL,
+    Quantity TEXT NOT NULL,
+    SupplierNumber TEXT NOT NULL,
+    SupplierName TEXT NOT NULL,
+    SupplierCountry TEXT NOT NULL,
+    CustomerNumber TEXT NOT NULL,
+    CustomerName TEXT NOT NULL,
+    CustomerCountry TEXT NOT NULL,
+    CustomerIndustry TEXT NOT NULL,
+    StandardCost TEXT NOT NULL,
+    StandardCostCurrency TEXT NOT NULL,
+    PurchaseOrderNumber TEXT NOT NULL,
+    SalesPriceValue TEXT NOT NULL,
+    SalesCurrency TEXT NOT NULL,
+    Incoterms2020 TEXT NOT NULL,
+    SalesResponsibleEmployee TEXT NOT NULL,
+    InvoiceDate TEXT NULL,
+    OrderDate TEXT NULL,
+    Land TEXT NOT NULL,
+    DocumentType TEXT NOT NULL,
+    FOREIGN KEY (SiteId) REFERENCES Sites (Id)
+);";
+        cmd.ExecuteNonQuery();
+    }
+
     private static void SeedIfEmpty(AppDbContext db)
     {
         if (db.HanaServers.Any())

TrafagSalesExporter/Services/ICentralSalesRecordService.cs

@@ -0,0 +1,9 @@
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services;
+
+public interface ICentralSalesRecordService
+{
+    Task ReplaceForSiteAsync(Site site, IEnumerable<SalesRecord> records);
+    Task<List<SalesRecord>> GetAllAsync();
+}

TrafagSalesExporter/Services/IConfigTransferService.cs

@@ -0,0 +1,7 @@
+namespace TrafagSalesExporter.Services;
+
+public interface IConfigTransferService
+{
+    Task<string> ExportJsonAsync(bool includeSecrets);
+    Task ImportJsonAsync(string json);
+}

TrafagSalesExporter/Services/ISapCompositionService.cs

@@ -0,0 +1,15 @@
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services;
+
+public interface ISapCompositionService
+{
+    Task<List<SalesRecord>> BuildSalesRecordsAsync(
+        Site site,
+        IReadOnlyList<SapSourceDefinition> sources,
+        IReadOnlyList<SapJoinDefinition> joins,
+        IReadOnlyList<SapFieldMapping> mappings,
+        string username,
+        string password,
+        CancellationToken cancellationToken = default);
+}

TrafagSalesExporter/Services/SapCompositionService.cs

@@ -0,0 +1,222 @@
+using System.Globalization;
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services;
+
+public class SapCompositionService : ISapCompositionService
+{
+    private readonly ISapGatewayService _sapGatewayService;
+
+    public SapCompositionService(ISapGatewayService sapGatewayService)
+    {
+        _sapGatewayService = sapGatewayService;
+    }
+
+    public async Task<List<SalesRecord>> BuildSalesRecordsAsync(
+        Site site,
+        IReadOnlyList<SapSourceDefinition> sources,
+        IReadOnlyList<SapJoinDefinition> joins,
+        IReadOnlyList<SapFieldMapping> mappings,
+        string username,
+        string password,
+        CancellationToken cancellationToken = default)
+    {
+        if (string.IsNullOrWhiteSpace(site.SapServiceUrl))
+            throw new InvalidOperationException($"Standort '{site.Land}' hat keine SAP Service URL.");
+
+        var activeSources = sources
+            .Where(s => s.IsActive)
+            .OrderBy(s => s.SortOrder)
+            .ThenBy(s => s.Id)
+            .ToList();
+        if (activeSources.Count == 0)
+            throw new InvalidOperationException($"Standort '{site.Land}' hat keine aktiven SAP-Quellen.");
+
+        var primarySource = activeSources.FirstOrDefault(s => s.IsPrimary) ?? activeSources.First();
+        var sourceRows = new Dictionary<string, List<Dictionary<string, object?>>>(StringComparer.OrdinalIgnoreCase);
+        foreach (var source in activeSources)
+        {
+            var rows = await _sapGatewayService.GetEntityRowsAsync(site.SapServiceUrl, source.EntitySet, username, password, cancellationToken);
+            sourceRows[source.Alias] = rows;
+        }
+
+        var composedRows = sourceRows[primarySource.Alias]
+            .Select(r => PrefixRow(primarySource.Alias, r))
+            .ToList();
+
+        foreach (var join in joins.Where(j => j.IsActive).OrderBy(j => j.SortOrder).ThenBy(j => j.Id))
+        {
+            if (!sourceRows.TryGetValue(join.RightAlias, out var rightRows))
+                continue;
+
+            composedRows = ApplyLeftJoin(composedRows, join.LeftAlias, join.LeftKeys, join.RightAlias, join.RightKeys, rightRows);
+        }
+
+        return composedRows
+            .Select(row => MapToSalesRecord(site, row, mappings))
+            .ToList();
+    }
+
+    private static Dictionary<string, object?> PrefixRow(string alias, Dictionary<string, object?> row)
+        => row.ToDictionary(kvp => $"{alias}.{kvp.Key}", kvp => kvp.Value, StringComparer.OrdinalIgnoreCase);
+
+    private static List<Dictionary<string, object?>> ApplyLeftJoin(
+        List<Dictionary<string, object?>> leftRows,
+        string leftAlias,
+        string leftKeys,
+        string rightAlias,
+        string rightKeys,
+        List<Dictionary<string, object?>> rightRows)
+    {
+        var leftKeyParts = SplitKeys(leftKeys);
+        var rightKeyParts = SplitKeys(rightKeys);
+        if (leftKeyParts.Count == 0 || leftKeyParts.Count != rightKeyParts.Count)
+            return leftRows;
+
+        var rightLookup = rightRows
+            .GroupBy(r => BuildKey(r, rightKeyParts))
+            .ToDictionary(g => g.Key, g => g.ToList(), StringComparer.OrdinalIgnoreCase);
+
+        var results = new List<Dictionary<string, object?>>();
+        foreach (var leftRow in leftRows)
+        {
+            var leftKey = BuildKey(leftRow, leftAlias, leftKeyParts);
+            if (rightLookup.TryGetValue(leftKey, out var matches) && matches.Count > 0)
+            {
+                foreach (var match in matches)
+                {
+                    var merged = new Dictionary<string, object?>(leftRow, StringComparer.OrdinalIgnoreCase);
+                    foreach (var kvp in PrefixRow(rightAlias, match))
+                        merged[kvp.Key] = kvp.Value;
+                    results.Add(merged);
+                }
+            }
+            else
+            {
+                results.Add(leftRow);
+            }
+        }
+
+        return results;
+    }
+
+    private static SalesRecord MapToSalesRecord(Site site, Dictionary<string, object?> row, IReadOnlyList<SapFieldMapping> mappings)
+    {
+        var record = new SalesRecord
+        {
+            ExtractionDate = DateTime.UtcNow,
+            Tsc = site.TSC,
+            Land = site.Land,
+            DocumentType = "SAP"
+        };
+
+        foreach (var mapping in mappings.Where(m => m.IsActive).OrderBy(m => m.SortOrder).ThenBy(m => m.Id))
+        {
+            var value = EvaluateExpression(row, mapping.SourceExpression);
+            ApplyValue(record, mapping.TargetField, value);
+        }
+
+        if (record.ExtractionDate == default)
+            record.ExtractionDate = DateTime.UtcNow;
+        if (string.IsNullOrWhiteSpace(record.Tsc))
+            record.Tsc = site.TSC;
+        if (string.IsNullOrWhiteSpace(record.Land))
+            record.Land = site.Land;
+
+        return record;
+    }
+
+    private static object? EvaluateExpression(Dictionary<string, object?> row, string expression)
+    {
+        if (string.IsNullOrWhiteSpace(expression))
+            return null;
+
+        var value = expression.Trim();
+        if (value.StartsWith('='))
+            return value[1..];
+
+        if (row.TryGetValue(value, out var direct))
+            return direct;
+
+        return null;
+    }
+
+    private static void ApplyValue(SalesRecord record, string targetField, object? value)
+    {
+        var property = typeof(SalesRecord).GetProperty(targetField);
+        if (property is null)
+            return;
+
+        try
+        {
+            if (property.PropertyType == typeof(string))
+            {
+                property.SetValue(record, value?.ToString() ?? string.Empty);
+                return;
+            }
+
+            if (property.PropertyType == typeof(int))
+            {
+                if (int.TryParse(value?.ToString(), NumberStyles.Any, CultureInfo.InvariantCulture, out var intValue))
+                    property.SetValue(record, intValue);
+                return;
+            }
+
+            if (property.PropertyType == typeof(decimal))
+            {
+                if (decimal.TryParse(value?.ToString(), NumberStyles.Any, CultureInfo.InvariantCulture, out var decimalValue))
+                    property.SetValue(record, decimalValue);
+                return;
+            }
+
+            if (property.PropertyType == typeof(DateTime?) || property.PropertyType == typeof(DateTime))
+            {
+                if (TryParseDate(value?.ToString(), out var date))
+                    property.SetValue(record, date);
+            }
+        }
+        catch
+        {
+            // ignore invalid mappings and continue with remaining fields
+        }
+    }
+
+    private static bool TryParseDate(string? value, out DateTime date)
+    {
+        date = default;
+        if (string.IsNullOrWhiteSpace(value))
+            return false;
+
+        var trimmed = value.Trim();
+        if (trimmed.StartsWith("/Date(", StringComparison.Ordinal) && trimmed.EndsWith(")/", StringComparison.Ordinal))
+        {
+            var epochRaw = trimmed[6..^2];
+            var separator = epochRaw.IndexOfAny(['+', '-']);
+            if (separator > 0)
+                epochRaw = epochRaw[..separator];
+            if (long.TryParse(epochRaw, out var ms))
+            {
+                date = DateTimeOffset.FromUnixTimeMilliseconds(ms).UtcDateTime;
+                return true;
+            }
+        }
+
+        return DateTime.TryParse(trimmed, CultureInfo.InvariantCulture, DateTimeStyles.AssumeLocal, out date)
+            || DateTime.TryParse(trimmed, CultureInfo.GetCultureInfo("de-CH"), DateTimeStyles.AssumeLocal, out date);
+    }
+
+    private static string BuildKey(Dictionary<string, object?> row, IReadOnlyList<string> keys)
+        => string.Join("||", keys.Select(k => NormalizeKeyValue(row.TryGetValue(k, out var value) ? value : null)));
+
+    private static string BuildKey(Dictionary<string, object?> row, string alias, IReadOnlyList<string> keys)
+        => string.Join("||", keys.Select(k =>
+        {
+            row.TryGetValue($"{alias}.{k}", out var value);
+            return NormalizeKeyValue(value);
+        }));
+
+    private static string NormalizeKeyValue(object? value) => value?.ToString()?.Trim() ?? string.Empty;
+
+    private static List<string> SplitKeys(string keys)
+        => keys.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries).ToList();
+}

TrafagSalesExporter/Services/SiteExportService.cs

@@ -10,26 +10,32 @@ public class SiteExportService : ISiteExportService
     private readonly IDbContextFactory<AppDbContext> _dbFactory;
     private readonly IHanaQueryService _hanaService;
     private readonly ISapGatewayService _sapGatewayService;
+    private readonly ISapCompositionService _sapCompositionService;
     private readonly IExcelExportService _excelService;
     private readonly ISharePointUploadService _sharePointService;
     private readonly IRecordTransformationService _transformationService;
+    private readonly ICentralSalesRecordService _centralSalesRecordService;
     private readonly ILogger<SiteExportService> _logger;
 
     public SiteExportService(
         IDbContextFactory<AppDbContext> dbFactory,
         IHanaQueryService hanaService,
         ISapGatewayService sapGatewayService,
+        ISapCompositionService sapCompositionService,
         IExcelExportService excelService,
         ISharePointUploadService sharePointService,
         IRecordTransformationService transformationService,
+        ICentralSalesRecordService centralSalesRecordService,
         ILogger<SiteExportService> logger)
     {
         _dbFactory = dbFactory;
         _hanaService = hanaService;
         _sapGatewayService = sapGatewayService;
+        _sapCompositionService = sapCompositionService;
         _excelService = excelService;
         _sharePointService = sharePointService;
         _transformationService = transformationService;
+        _centralSalesRecordService = centralSalesRecordService;
         _logger = logger;
     }
 
@@ -59,14 +65,25 @@ public class SiteExportService : ISiteExportService
                 var credentials = ResolveCredentials(site, settings, sourceSystem);
                 if (string.IsNullOrWhiteSpace(site.SapServiceUrl))
                     throw new InvalidOperationException($"Standort '{site.Land}' hat keine SAP Service URL.");
-                if (string.IsNullOrWhiteSpace(site.SapEntitySet))
-                    throw new InvalidOperationException($"Standort '{site.Land}' hat kein SAP Entity Set ausgewählt.");
+                var sapSources = await db.SapSourceDefinitions.Where(s => s.SiteId == site.Id).ToListAsync();
+                var sapJoins = await db.SapJoinDefinitions.Where(j => j.SiteId == site.Id).ToListAsync();
+                var sapMappings = await db.SapFieldMappings.Where(m => m.SiteId == site.Id).ToListAsync();
+                if (sapSources.Count == 0)
+                    throw new InvalidOperationException($"Standort '{site.Land}' hat keine SAP-Quellen konfiguriert.");
+                if (sapMappings.Count == 0)
+                    throw new InvalidOperationException($"Standort '{site.Land}' hat keine SAP-Feldmappings.");
 
-                updateStatus?.Invoke("SAP Gateway Abfrage...");
-                var rows = await _sapGatewayService.GetEntityRowsAsync(site.SapServiceUrl, site.SapEntitySet, credentials.Username, credentials.Password);
+                updateStatus?.Invoke("SAP Quellen laden...");
+                records = await _sapCompositionService.BuildSalesRecordsAsync(site, sapSources, sapJoins, sapMappings, credentials.Username, credentials.Password);
+                updateStatus?.Invoke("Transformationen anwenden...");
+                var rules = await db.FieldTransformationRules
+                    .Where(r => r.IsActive && r.SourceSystem == sourceSystem)
+                    .OrderBy(r => r.SortOrder)
+                    .ToListAsync();
+                _transformationService.Apply(records, rules);
                 updateStatus?.Invoke("Excel erstellen...");
-                filePath = _excelService.CreateGenericExcelFile(outputDir, $"SAP_{site.TSC}_{site.SapEntitySet}", DateTime.UtcNow.Date, site.SapEntitySet, rows);
-                log.RowCount = rows.Count;
+                filePath = _excelService.CreateExcelFile(outputDir, site.TSC, DateTime.UtcNow.Date, records);
+                log.RowCount = records.Count;
             }
             else
             {
@@ -87,6 +104,9 @@ public class SiteExportService : ISiteExportService
                 log.RowCount = records.Count;
             }
 
+            updateStatus?.Invoke("Zentrale Tabelle aktualisieren...");
+            await _centralSalesRecordService.ReplaceForSiteAsync(site, records);
+
             var fileName = Path.GetFileName(filePath);
 
             if (spConfig is not null &&

TrafagSalesExporter/wwwroot/js/download.js

@@ -0,0 +1,13 @@
+window.trafagDownload = {
+    saveTextFile: function (filename, content, contentType) {
+        const blob = new Blob([content], { type: contentType || "application/json;charset=utf-8" });
+        const url = URL.createObjectURL(blob);
+        const link = document.createElement("a");
+        link.href = url;
+        link.download = filename;
+        document.body.appendChild(link);
+        link.click();
+        document.body.removeChild(link);
+        URL.revokeObjectURL(url);
+    }
+};