public async Task <Unit> Handle(CreateTagCommand request, CancellationToken cancellationToken)
{
var entity = new Tag(request.Name);
_context.Tags.Add(entity);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <PostDetailDto> Handle(CreatePostCommand request, CancellationToken cancellationToken)
{
var entity = new Post(request.Title, request.Description, request.Content,
request.CategoryId, request.Tags, request.Published);
_context.Posts.Add(entity);
await _context.SaveChangesAsync(cancellationToken);
return(_mapper.Map <PostDetailDto>(entity));
}
public async Task <Unit> Handle(UpdateCategoryCommand request, CancellationToken cancellationToken)
{
var entity = await _context.Categories
.FirstOrDefaultAsync(i => i.Id == request.Id, cancellationToken);
if (entity == null)
{
throw new NotFoundException(nameof(Category), nameof(Category.Id), request.Id);
}
entity.Update(request.Name, request.UpdateSlug);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(DeleteTagCommand request, CancellationToken cancellationToken)
{
var entity = await _context.Tags
.FirstOrDefaultAsync(i => i.Id == request.Id, cancellationToken);
if (entity == null)
{
throw new NotFoundException(nameof(Tag), nameof(Tag.Id), request.Id);
}
_context.Tags.Remove(entity);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(UpdatePostCommand request, CancellationToken cancellationToken)
{
var entity = await _context.Posts
.Include(x => x.PostTags)
.FirstOrDefaultAsync(i => i.Id == request.Id, cancellationToken);
if (entity == null)
{
throw new NotFoundException(nameof(Post), nameof(Post.Id), request.Id);
}
entity.Update(request.Title, request.Description, request.Content, request.CategoryId,
request.Tags, request.Published, request.UpdateSlug);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(DeleteCategoryCommand request, CancellationToken cancellationToken)
{
var entity = await _context.Categories
.FirstOrDefaultAsync(i => i.Id == request.Id, cancellationToken);
if (entity == null)
{
throw new NotFoundException(nameof(Category), nameof(Category.Id), request.Id);
}
var hasPosts = _context.Posts.Any(p => p.CategoryId == entity.Id);
if (hasPosts)
{
throw new DeleteFailureException(nameof(Category), nameof(Category.Name),
entity.Name, "There are existing posts associated with this category.");
}
_context.Categories.Remove(entity);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}