public async Task <Post> AddAsync(Post post)
{
using (var context = new BlogPostDbContext(new DbContextOptions <BlogPostDbContext>()))
{
var postEntity = _mapper.Map <Post, PostEntity>(post);
var addedPost = await context.Set <PostEntity>().AddAsync(postEntity);
await context.SaveChangesAsync();
return(_mapper.Map <PostEntity, Post>(addedPost.Entity));
}
}
public async Task <Comment> AddAsync(Comment entity)
{
using (var context = new BlogPostDbContext(new DbContextOptions <BlogPostDbContext>()))
{
var postExists = await context.Set <PostEntity>().AnyAsync(x => x.Id == entity.PostId);
if (!postExists)
{
throw new InvalidOperationException($"Comment can not be added. The Post {entity.PostId} can not be found.");
}
var commentEntity = _mapper.Map <Comment, CommentEntity>(entity);
var addedComment = await context.Set <CommentEntity>().AddAsync(commentEntity);
await context.SaveChangesAsync();
return(_mapper.Map <CommentEntity, Comment>(addedComment.Entity));
}
}
public async Task <bool> RemoveAsync(Guid id)
{
using (var context = new BlogPostDbContext(new DbContextOptions <BlogPostDbContext>()))
{
var postEntity = await context.Posts
.Include(pst => pst.Comments)
.SingleOrDefaultAsync(pst => pst.Id == id);
if (postEntity == null)
{
throw new InvalidOperationException($"The Post Id {id} can not be found.");
}
if (postEntity.Comments.Count != 0)
{
return(false);
}
context.Posts.Remove(postEntity);
await context.SaveChangesAsync();
return(true);
}
}
