LehrerApp/LehrerApp.Desktop/Views/Settings/SettingsView.axaml.cs

using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Platform.Storage;
using LehrerApp.Desktop.ViewModels.Settings;

namespace LehrerApp.Desktop.Views.Settings;

public partial class SettingsView : UserControl
{
    public SettingsView() => InitializeComponent();

    private async void OnImportClick(object? sender, RoutedEventArgs e)
    {
        var topLevel = TopLevel.GetTopLevel(this);
        if (topLevel is null || DataContext is not SettingsViewModel vm) return;

        var files = await topLevel.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
        {
            Title         = "Kompetenzkatalog importieren",
            AllowMultiple = false,
            FileTypeFilter = [new FilePickerFileType("JSON-Dateien") { Patterns = ["*.json"] }],
        });

        if (files.Count == 0) return;
        var json = await File.ReadAllTextAsync(files[0].Path.LocalPath);
        vm.ImportCatalog(json);
    }

    private async void OnExportClick(object? sender, RoutedEventArgs e)
    {
        var topLevel = TopLevel.GetTopLevel(this);
        if (topLevel is null || DataContext is not SettingsViewModel vm) return;

        var file = await topLevel.StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions
        {
            Title             = "Kompetenzkatalog exportieren",
            SuggestedFileName = $"Kompetenzkatalog_{vm.CatalogSubject?.Name}_{vm.CatalogGradeLevel}.json",
            FileTypeChoices   = [new FilePickerFileType("JSON-Dateien") { Patterns = ["*.json"] }],
        });

        if (file is null) return;
        var json = vm.ExportCatalog();
        await File.WriteAllTextAsync(file.Path.LocalPath, json);
    }

    private async void OnEditGradingKeyTemplateClick(object? sender, RoutedEventArgs e)
    {
        if (sender is not Button { Tag: GradingKeyTemplateEditItem item }) return;
        var dialog = new GradingKeyTemplateDialog { DataContext = item };
        var owner = TopLevel.GetTopLevel(this) as Window;
        if (owner is not null) await dialog.ShowDialog(owner);
    }
}