This commit is contained in:
@@ -1,21 +1,23 @@
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using CommunityToolkit.Mvvm.ComponentModel;
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using LehrerApp.Core.Interfaces;
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using LehrerApp.Core.Models;
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using LehrerApp.Core.Services;
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using LehrerApp.Templating;
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using System.Collections.ObjectModel;
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using System.Globalization;
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namespace LehrerApp.Desktop.ViewModels.Students;
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public partial class CreateLetterDialogViewModel : ObservableObject
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{
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private readonly Student _student;
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private readonly LetterTemplateService _templates;
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private readonly TemplateStore _templates;
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private readonly ITemplateRenderer _renderer;
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[ObservableProperty] private LetterTemplateChoice? _selectedTemplate;
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[ObservableProperty] private LetterContactChoice? _selectedContact;
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[ObservableProperty] private LetterGroupChoice? _selectedGroup;
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[ObservableProperty] private DateTimeOffset? _letterDate = DateTimeOffset.Now;
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[ObservableProperty] private string _letterText = "";
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[ObservableProperty] private string _teacherName = "";
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[ObservableProperty] private string _generationError = "";
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[ObservableProperty] private bool _canGenerate;
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@@ -28,155 +30,92 @@ public partial class CreateLetterDialogViewModel : ObservableObject
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public bool HasNoTemplates => Templates.Count == 0;
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public bool HasNoContacts => Contacts.Count == 0;
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public string SuggestedFileName => SanitizeFileName(
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$"{SelectedTemplate?.Name ?? "Elternbrief"}_{_student.LastName}_{_student.FirstName}.docx");
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$"{SelectedTemplate?.Name ?? "Elternbrief"}_{_student.LastName}_{_student.FirstName}.pdf");
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public CreateLetterDialogViewModel(Student student, LetterTemplateService templates,
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public CreateLetterDialogViewModel(Student student, TemplateStore templates, ITemplateRenderer renderer,
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IGroupMembershipRepository memberships, IGroupRepository groups)
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{
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_student = student;
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_templates = templates;
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foreach (var template in templates.GetTemplates())
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Templates.Add(new LetterTemplateChoice(template));
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foreach (var contact in student.Contacts.Where(c => !c.InvalidSince.HasValue).OrderBy(c => c.Name))
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Contacts.Add(new LetterContactChoice(contact));
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_student = student; _templates = templates; _renderer = renderer;
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foreach (var template in templates.GetTemplates()) Templates.Add(new(template));
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foreach (var contact in student.Contacts.Where(c => !c.InvalidSince.HasValue).OrderBy(c => c.Name)) Contacts.Add(new(contact));
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foreach (var membership in memberships.GetByStudent(student.Id))
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{
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var group = groups.GetById(membership.GroupId);
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if (group is not null) Groups.Add(new LetterGroupChoice(group));
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}
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SelectedTemplate = Templates.FirstOrDefault();
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SelectedContact = Contacts.FirstOrDefault();
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SelectedGroup = Groups.FirstOrDefault();
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if (groups.GetById(membership.GroupId) is { } group) Groups.Add(new(group));
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SelectedTemplate = Templates.FirstOrDefault(); SelectedContact = Contacts.FirstOrDefault(); SelectedGroup = Groups.FirstOrDefault();
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RefreshValidation();
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}
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partial void OnSelectedTemplateChanged(LetterTemplateChoice? value)
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{
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OnPropertyChanged(nameof(SuggestedFileName));
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RefreshValidation();
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}
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partial void OnSelectedTemplateChanged(LetterTemplateChoice? value) { OnPropertyChanged(nameof(SuggestedFileName)); RefreshValidation(); }
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partial void OnSelectedContactChanged(LetterContactChoice? value) => RefreshValidation();
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partial void OnSelectedGroupChanged(LetterGroupChoice? value) => RefreshValidation();
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partial void OnLetterDateChanged(DateTimeOffset? value) => RefreshValidation();
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partial void OnLetterTextChanged(string value) => RefreshValidation();
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partial void OnTeacherNameChanged(string value) => RefreshValidation();
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public bool Generate(string outputPath)
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{
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RefreshValidation();
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if (!CanGenerate || SelectedTemplate is null) return false;
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GenerationError = "";
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RefreshValidation(); if (!CanGenerate || SelectedTemplate is null) return false;
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try
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{
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_templates.Generate(_templates.GetTemplatePath(SelectedTemplate.Model), outputPath, BuildValues());
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return true;
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}
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catch (Exception ex) when (ex is IOException or InvalidDataException or UnauthorizedAccessException)
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{
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GenerationError = $"Der Brief konnte nicht erzeugt werden: {ex.Message}";
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return false;
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var pdf = _renderer.RenderToPdf(_templates.Load(SelectedTemplate.Model), new LetterDataProvider(BuildValues()));
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var directory = Path.GetDirectoryName(outputPath); if (!string.IsNullOrEmpty(directory)) Directory.CreateDirectory(directory);
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File.WriteAllBytes(outputPath, pdf); GenerationError = ""; return true;
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}
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catch (Exception ex) when (ex is IOException or InvalidDataException or UnauthorizedAccessException or TemplateValidationException)
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{ GenerationError = $"Der Brief konnte nicht erzeugt werden: {ex.Message}"; return false; }
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}
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private void RefreshValidation()
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{
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Issues.Clear();
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GenerationError = "";
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if (SelectedTemplate is null)
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Issues.Add(new("Bitte zuerst in den Einstellungen eine DOCX-Briefvorlage importieren.", true));
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if (SelectedContact is null)
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Issues.Add(new("Für den Schüler ist kein aktueller Kontakt ausgewählt.", true));
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if (LetterDate is null)
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Issues.Add(new("Bitte ein Briefdatum auswählen.", true));
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Issues.Clear(); GenerationError = "";
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if (SelectedTemplate is null) Issues.Add(new("Bitte zuerst in den Einstellungen ein .lavorlage-Paket importieren.", true));
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if (SelectedContact is null) Issues.Add(new("Für den Schüler ist kein aktueller Kontakt ausgewählt.", true));
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if (LetterDate is null) Issues.Add(new("Bitte ein Briefdatum auswählen.", true));
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if (SelectedTemplate is not null)
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{
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var validation = _templates.Validate(SelectedTemplate.Model);
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foreach (var issue in validation.Issues)
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Issues.Add(new(issue.Message, issue.Severity is TemplateIssueSeverity.StrongWarning or TemplateIssueSeverity.Error));
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var tags = validation.Tags.ToHashSet(StringComparer.Ordinal);
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var values = BuildValues();
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foreach (var tag in tags.Where(t => values.TryGetValue(t, out var value) && string.IsNullOrWhiteSpace(value)))
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try
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{
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var message = tag switch
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{
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"Letter.Salutation" => "Beim ausgewählten Kontakt fehlt die Briefanrede.",
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"Contact.Address" or "Contact.Street" or "Contact.PostalCode" or "Contact.City" =>
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$"Beim ausgewählten Kontakt fehlt der Wert für „{tag}“.",
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"Group.Name" or "SchoolYear" => "Die Vorlage verwendet Gruppendaten; bitte eine Lerngruppe auswählen.",
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_ => $"Für das Vorlagenfeld „{tag}“ ist kein Wert vorhanden.",
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};
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Issues.Add(new(message, true));
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var loaded = _templates.Load(SelectedTemplate.Model); var values = BuildValues();
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var validation = new TemplateLoader().Validate(loaded, values.ToDictionary(x => x.Key, x => x.Value.Type));
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foreach (var issue in validation.Issues) Issues.Add(new(issue.Message, issue.Severity == ValidationSeverity.Error));
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foreach (var required in loaded.Manifest.Placeholders.Where(x => x.Required && values.TryGetValue(x.Name, out var value) && IsEmpty(value)))
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Issues.Add(new($"Für das Pflichtfeld „{required.Name}“ ist kein Wert vorhanden.", true));
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}
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catch (Exception ex) when (ex is IOException or InvalidDataException or TemplateValidationException)
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{ Issues.Add(new($"Vorlage ist ungültig: {ex.Message}", true)); }
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}
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CanGenerate = SelectedTemplate is not null && SelectedContact is not null && LetterDate is not null
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&& Issues.Count == 0;
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CanGenerate = SelectedTemplate is not null && SelectedContact is not null && LetterDate is not null && Issues.Count == 0;
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OnPropertyChanged(nameof(HasIssues));
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}
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private IReadOnlyDictionary<string, string?> BuildValues()
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private IReadOnlyDictionary<string, PlaceholderValue> BuildValues()
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{
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var contact = SelectedContact?.Model;
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var group = SelectedGroup?.Model;
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var cityLine = string.Join(" ", new[] { contact?.PostalCode, contact?.City }
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.Where(v => !string.IsNullOrWhiteSpace(v)));
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var address = string.Join(Environment.NewLine, new[] { contact?.Street, cityLine }
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.Where(v => !string.IsNullOrWhiteSpace(v)));
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var date = LetterDate is null ? null : DateOnly.FromDateTime(LetterDate.Value.LocalDateTime)
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.ToString("dd.MM.yyyy", CultureInfo.GetCultureInfo("de-DE"));
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return new Dictionary<string, string?>
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var contact = SelectedContact?.Model; var group = SelectedGroup?.Model;
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var cityLine = string.Join(" ", new[] { contact?.PostalCode, contact?.City }.Where(x => !string.IsNullOrWhiteSpace(x)));
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var address = string.Join(Environment.NewLine, new[] { contact?.Name, contact?.Street, cityLine }.Where(x => !string.IsNullOrWhiteSpace(x)));
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var date = DateOnly.FromDateTime((LetterDate ?? DateTimeOffset.Now).LocalDateTime);
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return new Dictionary<string, PlaceholderValue>(StringComparer.Ordinal)
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{
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["Student.FirstName"] = _student.FirstName,
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["Student.LastName"] = _student.LastName,
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["Contact.Name"] = contact?.Name,
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["Contact.Address"] = address,
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["Contact.Street"] = contact?.Street,
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["Contact.PostalCode"] = contact?.PostalCode,
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["Contact.City"] = contact?.City,
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["Letter.Salutation"] = contact?.LetterSalutation,
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["Group.Name"] = group?.Name,
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["SchoolYear"] = group?.SchoolYear,
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["CurrentDate"] = date,
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["Datum"] = new DateValue(date), ["CurrentDate"] = new DateValue(date),
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["Empfaenger"] = new TextValue(contact?.Name ?? ""), ["Anrede"] = new TextValue(contact?.LetterSalutation ?? ""),
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["Brieftext"] = new MultilineValue(LetterText), ["LehrerName"] = new TextValue(TeacherName),
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["Student.FirstName"] = new TextValue(_student.FirstName), ["Student.LastName"] = new TextValue(_student.LastName),
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["Contact.Name"] = new TextValue(contact?.Name ?? ""), ["Contact.Address"] = new MultilineValue(address),
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["Contact.Street"] = new TextValue(contact?.Street ?? ""), ["Contact.PostalCode"] = new TextValue(contact?.PostalCode ?? ""),
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["Contact.City"] = new TextValue(contact?.City ?? ""), ["Letter.Salutation"] = new TextValue(contact?.LetterSalutation ?? ""),
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["Group.Name"] = new TextValue(group?.Name ?? ""), ["SchoolYear"] = new TextValue(group?.SchoolYear ?? ""),
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};
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}
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private static bool IsEmpty(PlaceholderValue value) => value switch
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{ TextValue x => string.IsNullOrWhiteSpace(x.Value), MultilineValue x => string.IsNullOrWhiteSpace(x.Value), _ => false };
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private static string SanitizeFileName(string value)
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{
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foreach (var character in Path.GetInvalidFileNameChars()) value = value.Replace(character, '_');
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return value;
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}
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}
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public sealed class LetterTemplateChoice
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{
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public LetterTemplateInfo Model { get; }
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public string Name => Model.Name;
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public LetterTemplateChoice(LetterTemplateInfo model) => Model = model;
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}
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public sealed class LetterContactChoice
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{
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public Contact Model { get; }
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public string Display => string.IsNullOrWhiteSpace(Model.Relation)
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? Model.Name
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: $"{Model.Name} · {Model.Relation}";
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public LetterContactChoice(Contact model) => Model = model;
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}
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public sealed class LetterGroupChoice
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{
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public LearningGroup Model { get; }
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public string Display => $"{Model.Name} · {Model.SchoolYear}";
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public LetterGroupChoice(LearningGroup model) => Model = model;
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{ foreach (var character in Path.GetInvalidFileNameChars()) value = value.Replace(character, '_'); return value; }
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}
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internal sealed class LetterDataProvider(IReadOnlyDictionary<string, PlaceholderValue> values) : ITemplateDataProvider
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{ public IReadOnlyDictionary<string, PlaceholderValue> GetValues() => values; }
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public sealed class LetterTemplateChoice(InstalledTemplate model) { public InstalledTemplate Model { get; } = model; public string Name => Model.Name; }
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public sealed class LetterContactChoice(Contact model) { public Contact Model { get; } = model; public string Display => string.IsNullOrWhiteSpace(Model.Relation) ? Model.Name : $"{Model.Name} · {Model.Relation}"; }
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public sealed class LetterGroupChoice(LearningGroup model) { public LearningGroup Model { get; } = model; public string Display => $"{Model.Name} · {Model.SchoolYear}"; }
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public sealed class LetterGenerationIssue(string message, bool isStrong)
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{
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public string Icon { get; } = isStrong ? "⚠" : "ⓘ";
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public string Message { get; } = message;
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public string Color { get; } = isStrong ? "#D97706" : "#6B7280";
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}
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{ public string Icon { get; } = isStrong ? "⚠" : "ⓘ"; public string Message { get; } = message; public string Color { get; } = isStrong ? "#D97706" : "#6B7280"; }
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