ba81359afa
- Updated Lesson entity to use LevelId (int) instead of Level (int) - Added navigation property Level (Level entity) - Added Order, Topic, and IsActive properties to Lesson - Updated Lesson.Create() factory method signature to accept levelId, title, order, topic, description - Split Update method into individual property update methods - Updated LessonDto to use LevelId, LevelName, LevelCode instead of Level int - Added CreateLessonDto and UpdateLessonDto with all required fields - Added UpdateFromDto extension method for Lesson - Updated CreateLessonCommand to validate LevelId instead of Level - Updated SeedDataExtension to seed Level entities first, then use new Lesson.Create() signature - Made SeedDatabaseAsync async and updated Program.cs to await it - Updated LessonsEndpoints to use GetByLevelAsync for beginner/advanced queries - Fixed missing using directive for Domain.Entities Generated by Mistral Vibe. Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
65 lines
2 KiB
C#
65 lines
2 KiB
C#
using GermanApp.Application.DTOs;
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using GermanApp.Domain.Entities;
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using GermanApp.Domain.Exceptions;
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using GermanApp.Domain.Interfaces;
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namespace GermanApp.Application.UseCases.Commands;
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/// <summary>
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/// Command for creating a new lesson.
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/// This follows the CQRS pattern - commands represent write operations.
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/// </summary>
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public record CreateLessonCommand(CreateLessonDto LessonData) : ICommand<LessonDto>;
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/// <summary>
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/// Handler for the CreateLessonCommand.
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/// </summary>
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public class CreateLessonCommandHandler : ICommandHandler<CreateLessonCommand, LessonDto>
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{
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private readonly ILessonRepository _lessonRepository;
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public CreateLessonCommandHandler(ILessonRepository lessonRepository)
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{
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_lessonRepository = lessonRepository;
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}
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public async Task<LessonDto> Handle(CreateLessonCommand command, CancellationToken cancellationToken)
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{
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// Convert DTO to domain entity
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var lesson = command.LessonData.ToEntity();
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// Validate business rules (could be extracted to a validator)
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if (lesson.LevelId < 1 || lesson.LevelId > 5)
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{
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throw new ValidationException("Level must be between 1 and 5");
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}
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// Add to repository
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var createdLesson = await _lessonRepository.AddAsync(lesson, cancellationToken);
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// Return DTO representation
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return createdLesson.ToDto();
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}
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}
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/// <summary>
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/// Generic command interface.
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/// </summary>
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/// <typeparam name="TResult">The result type</typeparam>
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public interface ICommand<out TResult>
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{
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}
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/// <summary>
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/// Generic command handler interface.
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/// </summary>
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/// <typeparam name="TCommand">The command type</typeparam>
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/// <typeparam name="TResult">The result type</typeparam>
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public interface ICommandHandler<in TCommand, TResult>
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where TCommand : ICommand<TResult>
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{
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Task<TResult> Handle(TCommand command, CancellationToken cancellationToken);
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}
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// Note: For MediatR integration, you would implement IRequestHandler<TCommand, TResult>
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// instead of the custom interfaces above.
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