public async Task <Result> Handle(DislikePostCommand request, CancellationToken cancellationToken)
{
using (var tx = _session.BeginTransaction())
{
var user = await _session.LoadAsync <User>(request.UserID);
var post = await GetPostAsync(request.UserID, request.PostID);
return(await user.RemoveLikeFrom(post)
.OnSuccessTry(async() => await tx.CommitAsync())
.OnSuccess(_ => _logger
.ForContext <DislikePostCommand>()
.Information("User [{Nickname}({UserID})] removed a 'Like' on post {PostID}",
user.Nickname,
request.UserID,
request.PostID))
.OnFailure(async errorMessage =>
{
await tx.RollbackAsync();
_logger
.ForContext <DislikePostCommand>()
.Error("Failed to remove a 'Like' on post {PostID} by user [{Nickname}({UserID})]. Error message: {ErrorMessage}",
request.PostID,
user.Nickname,
request.UserID,
errorMessage);
}));
}
}
public async Task Should_Dislike_A_Post()
{
Result likeResult;
var author = new User((Nickname)"author3", (FullName)"author three", Password.Create("password").Value, (Email)"*****@*****.**", "my bio");
var reader = new User((Nickname)"reader2", (FullName)"reader two", Password.Create("password").Value, (Email)"*****@*****.**", "my bio");
var post = new Post(author, (Picture)Convert.FromBase64String(DatabaseFixture.GetTestPictureBase64()), (PostText)"test post");
post.PutLikeBy(reader);
using (var session = _testFixture.OpenSession(_output))
{
await session.SaveAsync(author);
await session.SaveAsync(reader);
await session.SaveAsync(post);
}
var command = new DislikePostCommand(post.ID, reader.ID);
using (var session = _testFixture.OpenSession(_output))
{
var sut = new LikeOrDislikePostCommandHandler(session, Log.Logger);
likeResult = await sut.Handle(command, default);
}
using (new AssertionScope())
{
likeResult.IsSuccess.Should().BeTrue();
using (var session = _testFixture.OpenSession(_output))
{
(await session.GetAsync <Post>(post.ID)).Likes.Count().Should().Be(0);
}
}
}
public async Task Cannot_Dislike_A_Post_Without_Putting_A_Like_First()
{
Result likeResult;
var author = new User((Nickname)"author4", (FullName)"author four", Password.Create("password").Value, (Email)"*****@*****.**", "my bio");
var reader = new User((Nickname)"reader3", (FullName)"reader three", Password.Create("password").Value, (Email)"*****@*****.**", "my bio");
var post = new Post(author, (Picture)Convert.FromBase64String(DatabaseFixture.GetTestPictureBase64()), (PostText)"test post");
using (var session = _testFixture.OpenSession(_output))
{
await session.SaveAsync(author);
await session.SaveAsync(reader);
await session.SaveAsync(post);
}
var command = new DislikePostCommand(post.ID, reader.ID);
using (var session = _testFixture.OpenSession(_output))
{
var sut = new LikeOrDislikePostCommandHandler(session, Log.Logger);
likeResult = await sut.Handle(command, default);
}
likeResult.IsSuccess.Should().BeFalse($"User [{reader.Nickname}] did not put any 'Like' on this post.");
}
public async Task <IActionResult> Dislike(LikePostModel like)
{
var command = new DislikePostCommand(like.PostID, like.UserID);
var commandResult = await _dispatcher.Send(command);
return(commandResult.IsSuccess ? Ok() : StatusCode(StatusCodes.Status500InternalServerError));
}
