public async Task <bool> CheckPostTopicAndParentId(PostCommentData err, ForumContext context)
{
if (!int.TryParse(TopicId, out int topicId))
{
err.TopicId = "Topic id is incorrect";
return(false);
}
else if (await context.GetTopicById(topicId) == null)
{
err.TopicId = "Topic doesn't exist";
return(false);
}
else if (ParentCommentId != null)
{
if (!int.TryParse(ParentCommentId, out int parentCommentId))
{
err.ParentCommentId = "Parent comment id is incorrect";
return(false);
}
else if (await context.GetCommentInTopic(topicId, parentCommentId) == null)
{
err.ParentCommentId = "Comment doesn't exist or doesn't belong to topic";
return(false);
}
}
return(true);
}
public async Task <bool> CheckPostData(PostCommentData err, ForumContext context)
{
var checkText = CheckPostText(err);
var checkTopicAndParentId = await CheckPostTopicAndParentId(err, context);
return(checkTopicAndParentId && checkText);
}
public async Task <bool> CheckRegEmail(RegData err, ForumContext context)
{
if (Email == "")
{
err.Email = "Email is required";
return(false);
}
else if (Email.Length >= 50)
{
err.Email = "Email is too long";
return(false);
}
else if (!IsValidEmail(Email))
{
err.Email = "Email is invalid";
return(false);
}
else if ((await context.GetUserByEmail(Email)) != null)
{
err.Email = "Email is already in use";
return(false);
}
return(true);
}
public async Task <string> LikeComment(string username, ForumContext context)
{
if (!int.TryParse(Id, out int id))
{
return("Id is invalid");
}
else if (await context.GetCommentById(id) == null)
{
return("Comment doesn't exist");
}
var like = await context.GetCommentScore(id, username);
if (like == null)
{
await context.LikeComment(id, username);
return(null);
}
else if (like.Score == Score.Dislike)
{
await context.DeleteCommentDislike(id, username);
return(null);
}
else
{
return("User is already like comment");
}
}
public async Task <string> DislikeTopic(string username, ForumContext context)
{
if (!int.TryParse(Id, out int id))
{
return("Id is invalid");
}
else if (await context.GetTopicById(id) == null)
{
return("Topic doesn't exist");
}
var like = await context.GetTopicScore(id, username);
if (like == null)
{
await context.DislikeTopic(id, username);
return(null);
}
else if (like.Score == Score.Like)
{
await context.DeleteTopicLike(id, username);
return(null);
}
else
{
return("User is already dislike topic");
}
}
public async Task <bool> CheckRegData(RegData err, ForumContext context)
{
var checkUsername = await CheckRegUsername(err, context);
var checkEmail = await CheckRegEmail(err, context);
var checkPassword = CheckRegPassword(err);
return(checkUsername && checkEmail && checkPassword);
}
public async Task <bool> CheckRegUsername(RegData err, ForumContext context)
{
if (Username == "")
{
err.Username = "******";
return(false);
}
else if (Username.Length >= 20)
{
err.Username = "******";
return(false);
}
else if ((await context.GetUserByUsername(Username)) != null)
{
err.Username = "******";
return(false);
}
return(true);
}
public async Task <User> CheckLogin(ForumContext context)
{
var user = await context.GetUserByUsernameOrEmail(UsernameOrEmail);
return(user != null && user.ValidatePassword(Password) ? user : null);
}
