Vitalii Litvinchuk
38 lines
1.6 KiB
C#
38 lines
1.6 KiB
C#
using MediatR;
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using Microsoft.EntityFrameworkCore;
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using SequenceAuth.Example.Domain;
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using SequenceAuth.Example.Infrastructure;
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namespace SequenceAuth.Example.Features.Todos;
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public enum ChangeTodoStatusOutcome { Success, NotFound, Unauthorized }
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public record ChangeTodoStatusResult(ChangeTodoStatusOutcome Outcome, TodoItem? Item);
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public record ChangeTodoStatusCommand(Guid TodoId, Guid UserId, TodoStatus NewStatus) : IRequest<ChangeTodoStatusResult>;
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public class ChangeTodoStatusCommandHandler(AppDbContext dbContext) : IRequestHandler<ChangeTodoStatusCommand, ChangeTodoStatusResult>
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{
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public async Task<ChangeTodoStatusResult> Handle(ChangeTodoStatusCommand request, CancellationToken cancellationToken)
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{
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var todo = await dbContext.Todos.FirstOrDefaultAsync(t => t.Id == request.TodoId, cancellationToken);
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return todo switch
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{
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null => new ChangeTodoStatusResult(ChangeTodoStatusOutcome.NotFound, null),
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{ UserId: var userId } when userId != request.UserId => new ChangeTodoStatusResult(ChangeTodoStatusOutcome.Unauthorized, null),
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_ => await UpdateStatusAsync(todo, request.NewStatus, cancellationToken)
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};
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}
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private async Task<ChangeTodoStatusResult> UpdateStatusAsync(TodoItem todo, TodoStatus newStatus, CancellationToken cancellationToken)
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{
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var updatedTodo = todo with { Status = newStatus };
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dbContext.Entry(todo).CurrentValues.SetValues(updatedTodo);
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await dbContext.SaveChangesAsync(cancellationToken);
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return new ChangeTodoStatusResult(ChangeTodoStatusOutcome.Success, updatedTodo);
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}
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}
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