[init:] database service for a following implementation

DataStore/DatabaseService.cs

@@ -0,0 +1,166 @@
+using System;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+
+namespace Logof_Client;
+
+/// <summary>
+/// Zentrale Datenbankverwaltung für Logof Client.
+/// 
+/// Zuständig für:
+/// - PostgreSQL-Verbindung
+/// - EF Core DbContext
+/// - Datenbankmodelle
+/// - Migrationen
+/// - Verbindungstest
+/// </summary>
+public static class DatabseService
+{
+    private static DbContextOptions<LogofDbContext>? _options;
+
+    /// <summary>
+    /// Initialisiert die Datenbankverbindung.
+    /// Sollte einmal beim Programmstart aufgerufen werden.
+    /// </summary>
+    public static void Initialize(string connectionString)
+    {
+        if (string.IsNullOrWhiteSpace(connectionString))
+            throw new ArgumentException(
+                "Kein Datenbank-Connection-String angegeben.",
+                nameof(connectionString));
+
+        var builder = new DbContextOptionsBuilder<LogofDbContext>();
+
+        builder.UseNpgsql(connectionString);
+
+        _options = builder.Options;
+    }
+
+    /// <summary>
+    /// Erstellt einen neuen DbContext.
+    /// </summary>
+    public static LogofDbContext GetContext()
+    {
+        if (_options == null)
+            throw new InvalidOperationException(
+                "DB wurde noch nicht initialisiert. " +
+                "Rufen Sie DB.Initialize(...) auf.");
+
+        return new LogofDbContext(_options);
+    }
+
+    /// <summary>
+    /// Testet die Verbindung zum Datenbankserver.
+    /// </summary>
+    public static async Task<bool> TestConnectionAsync()
+    {
+        try
+        {
+            await using var db = GetContext();
+            return await db.Database.CanConnectAsync();
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    /// <summary>
+    /// Erstellt bzw. aktualisiert das Datenbankschema
+    /// anhand der vorhandenen EF-Core-Migrationen.
+    /// </summary>
+    public static async Task MigrateAsync()
+    {
+        await using var db = GetContext();
+
+        await db.Database.MigrateAsync();
+    }
+}
+
+
+// ============================================================================
+// DATABASE CONTEXT
+// ============================================================================
+
+public class LogofDbContext : DbContext
+{
+    public DbSet<CustomerEx> Customers => Set<CustomerEx>();
+
+    public LogofDbContext(
+        DbContextOptions<LogofDbContext> options)
+        : base(options)
+    {
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+
+        // --------------------------------------------------------------------
+        // Customer
+        // --------------------------------------------------------------------
+
+        modelBuilder.Entity<CustomerEx>(entity =>
+        {
+            entity.ToTable("customers");
+
+            entity.HasKey(x => x.Id);
+
+            entity.Property(x => x.Id)
+                .ValueGeneratedOnAdd();
+
+            entity.Property(x => x.Name)
+                .HasMaxLength(255)
+                .IsRequired();
+
+            entity.Property(x => x.Description)
+                .HasMaxLength(4000);
+
+            entity.Property(x => x.SenderAddress)
+                .HasMaxLength(4000);
+
+            entity.Property(x => x.Separator)
+                .HasMaxLength(1)
+                .IsRequired();
+
+            // Optimistic Concurrency
+            entity.Property(x => x.Version)
+                .IsConcurrencyToken();
+
+            entity.Property(x => x.CreatedAt)
+                .IsRequired();
+
+            entity.Property(x => x.UpdatedAt)
+                .IsRequired();
+        });
+    }
+}
+
+
+// ============================================================================
+// DATABASE MODELS
+// ============================================================================
+
+public class CustomerEx
+{
+    public long Id { get; set; }
+
+    public string Name { get; set; } = "";
+
+    public string Description { get; set; } = "";
+
+    public string SenderAddress { get; set; } = "";
+
+    public char Separator { get; set; } = ',';
+
+    /// <summary>
+    /// Wird bei jeder Änderung erhöht.
+    /// Verhindert, dass zwei Benutzer sich gegenseitig
+    /// Änderungen überschreiben.
+    /// </summary>
+    public long Version { get; set; } = 1;
+
+    public DateTime CreatedAt { get; set; }
+
+    public DateTime UpdatedAt { get; set; }
+}

Logof Client.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <OutputType>WinExe</OutputType>
-        <TargetFramework>net9.0</TargetFramework>
+        <TargetFramework>net10.0</TargetFramework>
         <Nullable>enable</Nullable>
         <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
         <ApplicationManifest>app.manifest</ApplicationManifest>
@@ -24,6 +24,9 @@
         <PackageReference Include="Markdown.Avalonia" Version="11.0.3" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
         <PackageReference Include="PdfSharp" Version="6.1.1" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.12" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.12" />
+        <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.3" />
     </ItemGroup>
 
     <ItemGroup>

MainWindow.axaml

@@ -21,44 +21,7 @@
                     <MenuItem Header="Über" x:Name="MnuAbout" Click="MnuAbout_OnClick" />
                 </MenuItem>
             </Menu>
-            <TabControl Grid.Row="1" x:Name="TcMain">
+            <TabControl Grid.Row="1">
-                <TabItem x:Name="Home">
-                    <TabItem.Header>
-                        <StackPanel Orientation="Horizontal">
-                            <LucideIcon Kind="House" Width="32" Height="32" Size="32" />
-                            <!-- <Label FontSize="20" Content="Addressverwaltung" VerticalContentAlignment="Center" /> -->
-                        </StackPanel>
-                    </TabItem.Header>
-                    <Grid RowDefinitions="3*,*,100">
-                        <StackPanel Orientation="Vertical" Grid.Row="0" HorizontalAlignment="Center" VerticalAlignment="Center" > <!-- ColumnDefinitions="*,*" -->
-                            <Label Content="Welcome to Logofclient!" HorizontalAlignment="Center" FontSize="32" ></Label>
-                            <Label Content="Version 1.0.1" FontSize="16" HorizontalAlignment="Center"></Label>
-                            <!-- <Image Source="assets/calc_man.png" MaxHeight="350" VerticalAlignment="Center" HorizontalAlignment="Center" /> -->
-                        </StackPanel>
-                        <Grid Grid.Row="1" Margin="20" IsVisible="True" x:Name="GrdHMCalcMan">
-                            <Image Source="assets/calc_man.png" VerticalAlignment="Center" HorizontalAlignment="Center" />
-                        </Grid>
-                        <!-- <Grid ColumnDefinitions="*,*,*" Grid.Row="1"> -->
-                            <StackPanel Grid.Row="2"  Orientation="Horizontal" Spacing="10" HorizontalAlignment="Center"
-                                        Margin="0,0,5,0">
-                                <Button  Width="250" HorizontalContentAlignment="Center"
-                                        Margin="0,0,0,10" IsEnabled="True" VerticalAlignment="Stretch"
-                                        x:Name="BtnAdmgmt" Click="BtnAdmgmt_OnClick">
-                                    <StackPanel Orientation="Vertical">
-                                        <StackPanel Orientation="Horizontal">
-                                            <LucideIcon Kind="MapPinHouse" Width="36" Height="36" />
-                                            <Label Content="Addressverwaltung" VerticalContentAlignment="Center" FontSize="15"
-                                                   FontWeight="Bold" />
-                                        </StackPanel>
-                                        <TextBlock TextWrapping="Wrap" FontSize="9" Text="Strukturierte Verwaltung von Adressen für Pressepost-Printmailings inkl. Erstellung von Bundleitzetteln." HorizontalAlignment="Stretch" TextAlignment="Left"></TextBlock>
-                                    </StackPanel>
-                                </Button>
-                                
-                            </StackPanel>
-                        <!-- </Grid> -->
-                       
-                    </Grid>
-                </TabItem>
                 <TabItem IsVisible="False" x:Name="Addressmanagement">
                     <TabItem.Header>
                         <StackPanel Orientation="Horizontal">

MainWindow.axaml.cs

@@ -994,7 +994,6 @@ public partial class MainWindow : Window
             NudExpMargFontSize.Value = (decimal)options.fontSize;
             NudExpMargSmallFontSize.Value = (decimal)options.smallFontSize;
             CbExpRnsPvSt.IsChecked =  options.rsPvSt;
-            CbExpRnsEnable.IsChecked = options.exportRunningSheets;
 
             TbExpRnsKNrAbs.Text = options.rsKNrAbs;
             TbExpRnsKNrEmp.Text = options.rsKNrEmp;
@@ -1041,10 +1040,8 @@ public partial class MainWindow : Window
             rsBundGew = TbExpRnsBundGew.Text,
             rsPalNr = ReadInt(NudExpRnsPalNr, 1),
             rsBundNrPal = ReadInt(NudExpRnsBundNrPal, 20),
-            rsNumGrouped = ReadInt(NudExpRnsPlzcount, 25),
             
-            rsPvSt = CbExpRnsPvSt.IsChecked.Value,
+            rsPvSt = CbExpRnsPvSt.IsChecked.Value
-            exportRunningSheets = CbExpRnsEnable.IsChecked.Value
         };
 
         Settings.Save();
@@ -1474,12 +1471,4 @@ public partial class MainWindow : Window
            
         } 
     }
-
-    private void BtnAdmgmt_OnClick(object? sender, RoutedEventArgs e)
-    {
-        if (Addressmanagement.IsVisible && Addressmanagement.IsVisible)
-        {
-            TcMain.SelectedIndex = 1;
-        }
-    }
 }

Tasks/AddressCreation.cs

@@ -168,7 +168,6 @@ public static class AddressCreator
         } // Error-Handling?
 
         if (address_line_count > 1) return string_address;
-        Logger.Log($"Address with ID {address.id} (refsid: {address.refsid} not valid for production use", Logger.LogType.Warning);
         return null;
     }
 

Tasks/PdfBuilder.cs

@@ -121,18 +121,17 @@ public class PdfBuilder
             }
 
             // national addresses
-            foreach (var person in addressSet.KasPersons
+            for (var i =  0; i < addressSet.KasPersons.Count; i++)
-                         .Where(person => person.IsGermany())
-                         .OrderBy(person => person.used_plz))
             {
                 string senderLineID = senderLine;
-                var addr = AddressCreator.CreateFinalMarkdownString(person.id);
+                if (!addressSet.KasPersons[i].IsGermany()) continue;
+                var addr = AddressCreator.CreateFinalMarkdownString(addressSet.KasPersons[i].id);
                 if (string.IsNullOrWhiteSpace(addr)) continue;
                 if (pvst)
                     senderLineID += $"</font6>**PvSt, DP AG, Entgelt bezahlt, ZKZ {Settings._instance.pdfExport.rsZKZ}**\n<font6>";
                 
-                if (person.refsid != null || person.refsid != 0)
+                if (addressSet.KasPersons[i].refsid != null || addressSet.KasPersons[i].refsid != 0)
-                    senderLineID += $"ID: {person.refsid}\n</font6>";
+                    senderLineID += $"ID: {addressSet.KasPersons[i].refsid}\n</font6>";
                 else
                     senderLineID += "\n</font6>";
                 if (!string.IsNullOrEmpty(senderLineID))
@@ -142,19 +141,17 @@ public class PdfBuilder
             }
             
             // international addresses
-            foreach (var person in addressSet.KasPersons
+            for (var i = 0; i < addressSet.KasPersons.Count; i++)
-                         .Where(person => !person.IsGermany())
-                         .OrderBy(person => person.land)
-                         .ThenBy(person => person.used_plz))
             {
                 string senderLineID = senderLine;
-                var addr = AddressCreator.CreateFinalMarkdownString(person.id);
+                if (addressSet.KasPersons[i].IsGermany()) continue;
+                var addr = AddressCreator.CreateFinalMarkdownString(addressSet.KasPersons[i].id);
                 if (string.IsNullOrWhiteSpace(addr)) continue;
                 if (pvst)
                     senderLineID += $"</font6>**PvSt, DP AG, Entgelt bezahlt, ZKZ {Settings._instance.pdfExport.rsZKZ}**\n<font6>";
 
-                if (person.refsid != null || person.refsid != 0)
+                if (addressSet.KasPersons[i].refsid != null || addressSet.KasPersons[i].refsid != 0)
-                    senderLineID += $"ID: {person.refsid}\n</font6>";
+                    senderLineID += $"ID: {addressSet.KasPersons[i].refsid}\n</font6>";
                 else
                     senderLineID += "\n</font6>";
                 if (!string.IsNullOrEmpty(senderLineID))
@@ -712,14 +709,12 @@ public class PdfBuilder
             var fontBig = new XFont("Arial", 30, XFontStyleEx.Bold);
 
             int firstIndex = pageIndex * 2;
-            int? palletNumber = null;
+            int palletNumber =
-            int? bundleOnPallet = null;
+                Settings._instance.pdfExport.rsPalNr +
-            if (Settings._instance.pdfExport.rsBundNrPal > 0)
+                (firstIndex / Settings._instance.pdfExport.rsBundNrPal);
-            {
+
-                palletNumber = Settings._instance.pdfExport.rsPalNr +
+            int bundleOnPallet =
-                               (firstIndex / Settings._instance.pdfExport.rsBundNrPal);
+                (firstIndex % Settings._instance.pdfExport.rsBundNrPal) + 1;
-                bundleOnPallet = (firstIndex % Settings._instance.pdfExport.rsBundNrPal) + 1;
-            }
 
             DrawGermanyRunningSheet(
                 gfx,
@@ -740,14 +735,12 @@ public class PdfBuilder
 
             int secondIndex = firstIndex + 1;
 
-            int? palletNumber2 = null;
+            int palletNumber2 =
-            int? bundleOnPallet2 = null;
+                Settings._instance.pdfExport.rsPalNr +
-            if (Settings._instance.pdfExport.rsBundNrPal > 0)
+                (secondIndex / Settings._instance.pdfExport.rsBundNrPal);
-            {
+
-                palletNumber2 = Settings._instance.pdfExport.rsPalNr +
+            int bundleOnPallet2 =
-                                (secondIndex / Settings._instance.pdfExport.rsBundNrPal);
+                (secondIndex % Settings._instance.pdfExport.rsBundNrPal) + 1;
-                bundleOnPallet2 = (secondIndex % Settings._instance.pdfExport.rsBundNrPal) + 1;
-            }
 
             if (firstIndex + 1 < grouped_nums.Count)
             {
@@ -773,7 +766,7 @@ public class PdfBuilder
         document.Save(path);
     }
 
-    private void DrawGermanyRunningSheet(XGraphics gfx, double x, double y, double w, double h, KasAddressList list, dynamic result, List<(int,string,string,string,int)> grouped_nums, XFont fontLabel, XFont fontText, XFont fontBig, int? pal_nr, int? bundleOnPallet, int totalBundleNumber)
+    private void DrawGermanyRunningSheet(XGraphics gfx, double x, double y, double w, double h, KasAddressList list, dynamic result, List<(int,string,string,string,int)> grouped_nums, XFont fontLabel, XFont fontText, XFont fontBig, int pal_nr, int bundleOnPallet, int totalBundleNumber)
     {
         double line = 1.0;
 
@@ -921,20 +914,20 @@ public class PdfBuilder
             new XRect(valueX, blY1 + 4, valueW, 14),
             XStringFormats.TopRight);
 
-        if (options.rsBundNrPal > 0)
+        if (options.rsBundNrPal == null) goto nopal;
-        {
+        gfx.DrawString(pal_nr.ToString(), fontText, XBrushes.Black,
-            gfx.DrawString(pal_nr?.ToString() ?? string.Empty, fontText, XBrushes.Black,
+            new XRect(valueX, blY3 + 4, valueW, 14),
-                new XRect(valueX, blY3 + 4, valueW, 14),
+            XStringFormats.TopRight);
-                XStringFormats.TopRight);
 
-            gfx.DrawString(
-                $"{bundleOnPallet}/{options.rsBundNrPal}",
-                fontText,
-                XBrushes.Black,
-                new XRect(valueX, blY4 + 4, valueW, 14),
-                XStringFormats.TopRight);
-        }
     
+        gfx.DrawString(
+            $"{bundleOnPallet}/{Settings._instance.pdfExport.rsBundNrPal}",
+            fontText,
+            XBrushes.Black,
+            new XRect(valueX, blY4 + 4, valueW, 14),
+            XStringFormats.TopRight);
+
+        nopal:
         gfx.DrawString(
             $"{totalBundleNumber}/{grouped_nums.Count}",
             fontText,
@@ -991,14 +984,12 @@ public class PdfBuilder
 
             int firstIndex = pageIndex * 2;
 
-            int? palletNumber = null;
+            int palletNumber =
-            int? bundleOnPallet = null;
+                Settings._instance.pdfExport.rsPalNr +
-            if (Settings._instance.pdfExport.rsBundNrPal > 0)
+                (firstIndex / Settings._instance.pdfExport.rsBundNrPal);
-            {
+
-                palletNumber = Settings._instance.pdfExport.rsPalNr +
+            int bundleOnPallet =
-                               (firstIndex / Settings._instance.pdfExport.rsBundNrPal);
+                (firstIndex % Settings._instance.pdfExport.rsBundNrPal) + 1;
-                bundleOnPallet = (firstIndex % Settings._instance.pdfExport.rsBundNrPal) + 1;
-            }
             
             
 
@@ -1023,14 +1014,12 @@ public class PdfBuilder
             {
                 int secondIndex = firstIndex + 1;
 
-                int? palletNumber2 = null;
+                int palletNumber2 =
-                int? bundleOnPallet2 = null;
+                    Settings._instance.pdfExport.rsPalNr +
-                if (Settings._instance.pdfExport.rsBundNrPal > 0)
+                    (secondIndex / Settings._instance.pdfExport.rsBundNrPal);
-                {
+
-                    palletNumber2 = Settings._instance.pdfExport.rsPalNr +
+                int bundleOnPallet2 =
-                                    (secondIndex / Settings._instance.pdfExport.rsBundNrPal);
+                    (secondIndex % Settings._instance.pdfExport.rsBundNrPal) + 1;
-                    bundleOnPallet2 = (secondIndex % Settings._instance.pdfExport.rsBundNrPal) + 1;
-                }
 
                 DrawInternationalRunningSheet(
                     gfx,
@@ -1053,7 +1042,7 @@ public class PdfBuilder
 
         document.Save(path);
     }
-    private void DrawInternationalRunningSheet(XGraphics gfx, double x, double y, double w, double h, KasAddressList list, dynamic result, List<(int,string,string,string,int)> grouped_nums, XFont fontLabel, XFont fontText, XFont fontBig, int? pal_nr, int? bundleOnPallet, int totalBundleNumber, string category = "ECONOMY Non-EU")
+    private void DrawInternationalRunningSheet(XGraphics gfx, double x, double y, double w, double h, KasAddressList list, dynamic result, List<(int,string,string,string,int)> grouped_nums, XFont fontLabel, XFont fontText, XFont fontBig, int pal_nr, int bundleOnPallet, int totalBundleNumber, string category = "ECONOMY Non-EU")
     {
         double line = 1.0;
 
@@ -1205,20 +1194,20 @@ public class PdfBuilder
             new XRect(valueX, blY2 + 4, valueW, 14),
             XStringFormats.TopRight);
 
-        if (options.rsBundNrPal > 0)
+        if (options.rsBundNrPal == 0) goto nopal;
-        {
+        gfx.DrawString(pal_nr.ToString(), fontText, XBrushes.Black,
-            gfx.DrawString(pal_nr?.ToString() ?? string.Empty, fontText, XBrushes.Black,
+            new XRect(valueX, blY3 + 4, valueW, 14),
-                new XRect(valueX, blY3 + 4, valueW, 14),
+            XStringFormats.TopRight);
-                XStringFormats.TopRight);
 
-            gfx.DrawString(
-                $"{bundleOnPallet}/{options.rsBundNrPal}",
-                fontText,
-                XBrushes.Black,
-                new XRect(valueX, blY4 + 4, valueW, 14),
-                XStringFormats.TopRight);
-        }
         
+        gfx.DrawString(
+            $"{bundleOnPallet}/{Settings._instance.pdfExport.rsBundNrPal}",
+            fontText,
+            XBrushes.Black,
+            new XRect(valueX, blY4 + 4, valueW, 14),
+            XStringFormats.TopRight);
+            
+        nopal: 
         gfx.DrawString(
             $"{totalBundleNumber}/{grouped_nums.Count}",
             fontText,