public static bool TrySavePost(PostViewModel postView)
{
var emptyCategory = string.IsNullOrWhiteSpace(postView.Category);
var emptyTitle = string.IsNullOrWhiteSpace(postView.Title);
var emptyContent = !postView.Content.Any();
if (emptyCategory || emptyTitle || emptyContent)
{
return(false);
}
var category = EnsureCategory(postView, ForumData.GetInstance());
var posts = ForumData.GetInstance().Posts;
var postId = posts.Any() ? posts.Last().Id + 1 : 1;
var author = UserService.GetUser(postView.Author);
var content = string.Join("", postView.Content);
var post = new Post(postId, postView.Title, content, category.Id, author.Id);
posts.Add(post);
author.Posts.Add(post.Id);
category.Posts.Add(post.Id);
ForumData.GetInstance().SaveChanges();
postView.PostId = postId;
return(true);
}
public static PostViewModel GetPostViewModel(int postId)
{
var post = ForumData.GetInstance().Posts.Find(p => p.Id == postId);
var postViewModel = new PostViewModel(post);
return(postViewModel);
}
public static bool TryAddReply(PostViewModel post, ReplyViewModel reply)
{
if (reply.Content is null)
{
return(false);
}
var replyContent = string.Join("", reply.Content);
if (string.IsNullOrWhiteSpace(replyContent))
{
return(false);
}
var replies = ForumData.GetInstance().Replies;
var author = ForumData.GetInstance().Users.Find(u => u.Username == reply.Author);
var replyId = replies.Any() ? replies.Last().Id + 1 : 1;
var replyModel = new Reply(replyId, replyContent, author.Id, post.PostId);
replies.Add(replyModel);
ForumData.GetInstance().SaveChanges();
return(true);
}
public static SignUpStatus TrySignUpUser(string username, string password)
{
var validUsername = !string.IsNullOrWhiteSpace(username) && username.Length > 3;
var validPassword = !string.IsNullOrWhiteSpace(password) && password.Length > 3;
if (!validUsername || !validPassword)
{
return(SignUpStatus.DetailsError);
}
var forumData = ForumData.GetInstance();
bool userAlreadyExists = forumData.Users.Any(u => u.Username == username && u.Password == password);
if (!userAlreadyExists)
{
//Look for the last entry and if there is no such return null. if the entry is null than make the first id be equal to 1
var userId = forumData.Users.LastOrDefault()?.Id + 1 ?? 1;
var user = new User(userId, username, password);
forumData.Users.Add(user);
forumData.SaveChanges();
return(SignUpStatus.Success);
}
return(SignUpStatus.UsernameTakenError);
}
internal static string[] GetAllGategoryNames()
{
var allCategories = ForumData.GetInstance()
.Categories
.Select(c => c.Name)
.ToArray();
return(allCategories);
}
internal static IEnumerable <Post> GetPostsByCategory(int categoryId)
{
var postIds = ForumData.GetInstance().Categories
.First(c => c.Id == categoryId).Posts.ToHashSet();
var posts = ForumData.GetInstance()
.Posts.Where(p => postIds.Contains(p.Id));
return(posts);
}
internal static IList <ReplyViewModel> GetPostReplies(int postId)
{
var post = ForumData.GetInstance().Posts.Find(p => p.Id == postId);
var replies = ForumData.GetInstance().Replies
.Where(r => r.PostId == post.Id)
.Select(r => new ReplyViewModel(r))
.ToList();
return(replies);
}
/// <summary>
/// Validate the username and password and check if it exists in the database
/// </summary>
/// <param name="username"></param>
/// <param name="password"></param>
/// <returns></returns>
public static bool TryLogInUser(string username, string password)
{
if (string.IsNullOrWhiteSpace(username) || string.IsNullOrWhiteSpace(password))
{
return(false);
}
var forumData = ForumData.GetInstance();
bool userExists = forumData.Users.Any(u => u.Username == username && u.Password == password);
return(userExists);
}
internal static Category GetCategory(int categoryId)
{
var category = ForumData.GetInstance().Categories.Find(c => c.Id == categoryId);
return(category);
}
internal static User GetUser(string username)
{
var user = ForumData.GetInstance().Users.Find(u => u.Username == username);
return(user);
}
internal static User GetUser(int userId)
{
var user = ForumData.GetInstance().Users.Find(u => u.Id == userId);
return(user);
}