public IEnumerable<TagModel> GetAll(
[ValueProvider(typeof(HeaderValueProviderFactory<string>))]string sessionKey)
{
var allTagModels = this.PerformOperation(() =>
{
UserValidator.ValidateSessionKey(sessionKey);
var context = new BloggingSystemContext();
using (context)
{
var loggedUserEntity = context.Users.FirstOrDefault<User>(u => u.SessionKey == sessionKey);
if (loggedUserEntity == null)
{
throw new InvalidOperationException("Invalid user or pasword!");
}
var tagModels = new List<TagModel>();
var tagEntities = context.Tags.Include("Posts").OrderBy(t => t.Name);
foreach (var tagEntity in tagEntities)
{
tagModels.Add(TagsMapper.ToModel(tagEntity));
}
return tagModels;
}
});
return allTagModels;
}
public HttpResponseMessage Get(string sessionKey)
{
try
{
this.VerifySessionKey(sessionKey);
}
catch (Exception e)
{
var errorResponse = this.Request.CreateErrorResponse(HttpStatusCode.BadRequest, e.Message);
return errorResponse;
}
var context = new BloggingSystemContext();
var tagsResult = from tag in context.Tags
orderby tag.Text
select new SimpleTagModel()
{
Id = tag.TagId,
Name = tag.Text,
PostsCount = tag.Posts.Count
};
var response = this.Request.CreateResponse(HttpStatusCode.OK, tagsResult);
return response;
}
public IQueryable<PostModel> GetAll(
[ValueProvider(typeof(HeaderValueProviderFactory<string>))]string sessionKey)
{
IQueryable<PostModel> allPostModels = this.PerformOperation(() =>
{
UserValidator.ValidateSessionKey(sessionKey);
var context = new BloggingSystemContext();
using (context)
{
var loggedUserEntity = context.Users.FirstOrDefault<User>(u => u.SessionKey == sessionKey);
if (loggedUserEntity == null)
{
throw new InvalidOperationException("Invalid user or pasword!");
}
var postModels = new List<PostModel>();
var postEntities = context.Posts
.Include("Comments").Include("Tags")
.OrderByDescending(p => p.PostDate);
foreach (var postEntity in postEntities.ToList())
{
postModels.Add(PostsMapper.ToModel(postEntity));
}
return postModels.AsQueryable<PostModel>();
}
});
return allPostModels;
}
public IOrderedQueryable<TagDto> GetAll()
{
try
{
var sessionKey = ApiControllerHelper.GetHeaderValue(Request.Headers, "X-SessionKey");
if (sessionKey == null)
{
throw new ArgumentNullException("No session key provided in the request header!");
}
var context = new BloggingSystemContext();
var user = context.Users.FirstOrDefault(u => u.SessionKey == sessionKey);
if (user == null)
{
throw new InvalidOperationException("Invalid username or password.");
}
var tags = context.Tags.Include(t => t.Posts).AsQueryable();
var tagDtos = GetAllTagDtos(tags);
return tagDtos.OrderBy(t => t.Name);
}
catch (Exception ex)
{
var errorResponse = Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex.Message);
throw new HttpResponseException(errorResponse);
}
}
public IQueryable<TagModel> GetAll(
[ValueProvider(typeof(HeaderValueProviderFactory<string>))]
string sessionKey)
{
var responseMsg = this.ExceptionHandling(
() =>
{
var context = new BloggingSystemContext();
var user = context.Users.FirstOrDefault(usr => usr.SessionKey == sessionKey);
if (user == null)
{
throw new InvalidOperationException("Invalid username or password!");
}
var tagsEntities = context.Tags;
var models =
(from tagEntity in tagsEntities
select new TagModel()
{
Id = tagEntity.Id,
Name = tagEntity.Name,
NumberOfPosts = tagEntity.Post.Tags.Count
});
return models.OrderBy(t => t.Name);
});
return responseMsg;
}
public IOrderedQueryable<PostDto> FilterByKeyword(string keyword)
{
try
{
var sessionKey = ApiControllerHelper.GetHeaderValue(Request.Headers, "X-SessionKey");
if (sessionKey == null)
{
throw new ArgumentNullException("No session key provided in the request header!");
}
var context = new BloggingSystemContext();
var user = context.Users.FirstOrDefault(u => u.SessionKey == sessionKey);
if (user == null)
{
throw new InvalidOperationException("Invalid username or password.");
}
var posts = context.Posts
.Include(p => p.Tags)
.Include(p => p.Comments)
.Where(p => p.Title.ToLower().IndexOf(keyword.ToLower()) >= 0);
var postDtos = GetAllPostDtos(posts);
return postDtos.OrderByDescending(p => p.PostDate);
}
catch (Exception ex)
{
var errorResponse = Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex.Message);
throw new HttpResponseException(errorResponse);
}
}
public static Post CreateNewEntity(PostModel postModel, User author, BloggingSystemContext context)
{
Post postEntity = new Post()
{
Title = postModel.Title,
Author = author,
PostDate = DateTime.Now,
Text = postModel.Text
};
foreach (var tagName in postModel.Tags)
{
postEntity.Tags.Add(Extensions.CreateOrLoadTag(tagName.ToLower(), context));
}
var titleTags = postModel.Title.Split(WordSeparators, StringSplitOptions.RemoveEmptyEntries);
foreach (var titleTagName in titleTags)
{
if (titleTagName.Length > 1)
{
postEntity.Tags.Add(Extensions.CreateOrLoadTag(titleTagName.ToLower(), context));
}
}
return postEntity;
}
public IQueryable<TagModel> GetTagsById(int tagId,
[ValueProvider(typeof(HeaderValueProviderFactory<string>))]
string sessionKey)
{
var responseMsg = this.ExceptionHandling(
() =>
{
var context = new BloggingSystemContext();
var entityTags = context.Tags.FirstOrDefault(x => x.Id == tagId).Post.Tags;
var tagModels = new List<TagModel>();
foreach (var entityTag in entityTags)
{
tagModels.Add(new TagModel()
{
Name = entityTag.Name,
Id = entityTag.Id,
NumberOfPosts = entityTag.Post.Tags.Count,
PostDate = entityTag.Post.PostDate
});
}
return tagModels.OrderByDescending(t => t.PostDate);
});
return responseMsg.AsQueryable();
}
public HttpResponseMessage LoginUser([FromBody]UserLoginModel user)
{
HttpResponseMessage responseMessage = this.PerformOperation(() =>
{
UserValidator.ValidateAuthenticationCode(user.AuthCode);
UserValidator.ValidateUsername(user.Username);
var context = new BloggingSystemContext();
using (context)
{
var userEntity = context.Users.FirstOrDefault(
u => u.AuthCode == user.AuthCode && u.Username == user.Username.ToLower());
if (userEntity == null)
{
throw new InvalidOperationException("User not registered!");
}
userEntity.SessionKey = UserValidator.GenerateSessionKey(userEntity.ID);
context.SaveChanges();
UserLoggedModel loggedUser = UsersMapper.ToModel(userEntity);
return this.Request.CreateResponse(HttpStatusCode.Created, loggedUser);
}
});
return responseMessage;
}
public HttpResponseMessage RegisterUser([FromBody]UserRegisterModel user)
{
HttpResponseMessage responseMessage = this.PerformOperation(() =>
{
UserValidator.ValidateAuthenticationCode(user.AuthCode);
UserValidator.ValidateDisplayName(user.DisplayName);
UserValidator.ValidateUsername(user.Username);
var context = new BloggingSystemContext();
using (context)
{
User exstingUserEntity = context.Users.FirstOrDefault<User>(
u => u.Username == user.Username.ToLower() || u.DisplayName.ToLower() == user.DisplayName.ToLower());
if (exstingUserEntity != null)
{
throw new InvalidOperationException("User already exists!");
}
User newUserEntity = UsersMapper.ToEntity(user);
context.Users.Add(newUserEntity);
context.SaveChanges();
newUserEntity.SessionKey = UserValidator.GenerateSessionKey(newUserEntity.ID);
context.SaveChanges();
UserLoggedModel loggedUser = UsersMapper.ToModel(newUserEntity);
return this.Request.CreateResponse(HttpStatusCode.Created, loggedUser);
}
});
return responseMessage;
}
private User GetAndValidateUser(string sessionKey, BloggingSystemContext context)
{
var user = context.Users.FirstOrDefault(usr => usr.SessionKey == sessionKey);
if (user == null)
{
throw new InvalidOperationException("Invalid username or password!");
}
return user;
}
public static void VerifySessionKey(string sessionKey)
{
var context = new BloggingSystemContext();
var user = context.Users.FirstOrDefault(
usr => usr.SessionKey == sessionKey);
if (user == null)
{
throw new ArgumentOutOfRangeException("You must be logged in to see this content");
}
}
private static void Main()
{
// Run the console client first in order to create the database
Database.SetInitializer<BloggingSystemContext>(new DatabaseInitializer());
using (var dbContext = new BloggingSystemContext())
{
dbContext.Database.Initialize(true);
Console.WriteLine(dbContext.Users.Count());
}
}
public HttpResponseMessage PostRegisterUser(UserModel model)
{
var responseMsg = this.PerformOperationAndHandleExceptions(() =>
{
var context = new BloggingSystemContext();
using (context)
{
this.ValidateUsername(model.Username);
this.ValidateNickname(model.DisplayName);
this.ValidateAuthCode(model.AuthCode);
var usernameLower = model.Username.ToLower();
var nicknameLower = model.DisplayName.ToLower();
var user = context.Users
.FirstOrDefault(usr => usr.Username == usernameLower ||
usr.DisplayName == nicknameLower);
if (user != null)
{
throw new InvalidOperationException("User exists");
}
user = new User()
{
Username = usernameLower,
DisplayName = model.DisplayName,
AuthCode = model.AuthCode,
};
context.Users.Add(user);
context.SaveChanges();
user.SessionKey = this.GenerateSessionKey(user.Id);
context.SaveChanges();
var loggedModel = new LoggedUserModel()
{
DisplayName = user.DisplayName,
SessionKey = user.SessionKey
};
var response = this.Request.CreateResponse(
HttpStatusCode.Created, loggedModel);
return response;
}
});
return responseMsg;
}
public static Tag CreateOrLoadTag(string tagName, BloggingSystemContext context)
{
Tag exstingTag = context.Tags.FirstOrDefault<Tag>(t => t.Name == tagName);
if (exstingTag != null)
{
return exstingTag;
}
Tag newTag = new Tag() { Name = tagName };
context.Tags.Add(newTag);
context.SaveChanges();
return newTag;
}
public IQueryable<PostModel> GetPostsForTag(int tagId,
[ValueProvider(typeof(HeaderValueProviderFactory<string>))] string sessionKey)
{
var responseMsg = this.PerformOperationAndHandleExceptions(() =>
{
var context = new BloggingSystemContext();
var user = GetAndValidateUser(sessionKey, context);
var postEntities = context.Posts.Where(p => p.Tags.Any(t => t.Id == tagId)).AsQueryable();
var models = PostsController.GetPostModelsFromEntities(postEntities);
return models.OrderByDescending(p => p.PostDate);
});
return responseMsg;
}
public IQueryable<TagModel> GetAll(
[ValueProvider(typeof(HeaderValueProviderFactory<string>))] string sessionKey)
{
var responseMsg = this.PerformOperationAndHandleExceptions(() =>
{
var context = new BloggingSystemContext();
var user = GetAndValidateUser(sessionKey, context);
var tagsEntities = context.Tags;
var models = GetTagsModelsFromEntities(tagsEntities);
return models.OrderBy(t => t.Name);
});
return responseMsg;
}
public IQueryable<PostModel> GetAll(
[ValueProvider(typeof(HeaderValueProviderFactory<string>))] string sessionKey)
{
var responseMsg = this.PerformOperationAndHandleExceptions(() =>
{
var context = new BloggingSystemContext();
var user = GetAndValidateUser(sessionKey, context);
var postsEntities = context.Posts;
var models = GetPostModelsFromEntities(postsEntities);
return models.OrderByDescending(p => p.PostDate);
});
return responseMsg;
}
public HttpResponseMessage GetPosts(int tagId, string sessionKey)
{
var context = new BloggingSystemContext();
var tag = context.Tags.FirstOrDefault(t => t.TagId == tagId);
try
{
this.VerifySessionKey(sessionKey);
if (tag == null)
{
throw new ArgumentOutOfRangeException("Tag not found");
}
}
catch (Exception e)
{
var errorResponse = this.Request.CreateErrorResponse(HttpStatusCode.BadRequest, e.Message);
return errorResponse;
}
var posts = tag.Posts;
var postsResult =
(from post in posts
orderby post.PostDate descending
select new PostModel()
{
Id = post.PostId,
Title = post.Title,
Text = post.Text,
PostDate = post.PostDate,
PostedBy = post.User.DisplayName,
Tags = (from t in post.Tags
select t.Text),
Comments = (from comment in post.Comments
orderby comment.PostDate descending
select new CommentModel()
{
Text = comment.Text,
CommentedBy = comment.User.DisplayName,
PostDate = comment.PostDate
})
});
var response = this.Request.CreateResponse(HttpStatusCode.Created, postsResult);
return response;
}
private User GetValidUser(string sessionKey)
{
var context = new BloggingSystemContext();
using (context)
{
var user = context.Users.FirstOrDefault(ur => ur.SessionKey == sessionKey);
if (user == null)
{
throw new InvalidOperationException("You are not logged in.");
}
return user;
}
}
public HttpResponseMessage PostLoginUser(UserModel model)
{
var responseMsg = this.PerformOperationAndHandleExceptions(() =>
{
var context = new BloggingSystemContext();
using (context)
{
this.ValidateUsername(model.Username);
this.ValidateAuthCode(model.AuthCode);
var usernameLower = model.Username.ToLower();
var nicknameLower = model.DisplayName.ToLower();
var user = context.Users
.FirstOrDefault(
usr => usr.Username == usernameLower &&
usr.AuthCode == model.AuthCode);
if (user == null)
{
throw new InvalidOperationException("Invalid name or password");
}
if (string.IsNullOrWhiteSpace(user.SessionKey))
{
var sesKey = this.GenerateSessionKey(user.Id);
ValidateSessionKey(sesKey);
user.SessionKey = sesKey;
context.SaveChanges();
}
var loggedModel = new LoggedUserModel()
{
DisplayName = user.DisplayName,
SessionKey = user.SessionKey
};
var response = this.Request.CreateResponse(
HttpStatusCode.OK, loggedModel);
return response;
}
});
return responseMsg;
}
public HttpResponseMessage AddComment(int postId, CommentModel comment,
[ValueProvider(typeof(HeaderValueProviderFactory<string>))] string sessionKey)
{
var responseMsg = this.PerformOperationAndHandleExceptions(() =>
{
var context = new BloggingSystemContext();
var user = GetAndValidateUser(sessionKey, context);
var postEntity = context.Posts.FirstOrDefault(p => p.Id == postId);
var commentEntity = new Comment() { PostDate = DateTime.Now, Text = comment.Text, User = user };
postEntity.Comments.Add(commentEntity);
context.SaveChanges();
var response = this.Request.CreateResponse(HttpStatusCode.OK);
return response;
});
return responseMsg;
}
public HttpResponseMessage LogoutUser(string sessionKey)
{
var context = new BloggingSystemContext();
var user = context.Users.FirstOrDefault(
usr => usr.SessionKey == sessionKey);
if (user != null)
{
user.SessionKey = null;
context.SaveChanges();
var response = this.Request.CreateResponse(HttpStatusCode.OK);
return response;
}
else
{
var response = this.Request.CreateErrorResponse(HttpStatusCode.BadRequest, "Wrong session");
return response;
}
}
public HttpResponseMessage Login(UserModel model)
{
var responseMsg = this.ExceptionHandling(
() =>
{
var context = new BloggingSystemContext();
using (context)
{
this.ValidateUsername(model.Username);
this.ValidateAuthCode(model.AuthCode);
var usernameToLower = model.Username.ToLower();
var user = context.Users.FirstOrDefault(
usr => usr.Username == usernameToLower
&& usr.AuthCode == model.AuthCode);
if (user == null)
{
throw new InvalidOperationException("Invalid username or password!");
}
if (user.SessionKey == null)
{
user.SessionKey = this.GenerateSessionKey(user.Id);
context.SaveChanges();
}
var loggedModel = new LoggedUserModel()
{
Displayname = user.Displayname,
SessionKey = user.SessionKey
};
var response =
this.Request.CreateResponse(HttpStatusCode.Created,
loggedModel);
return response;
}
});
return responseMsg;
}
public IQueryable<PostModel> GetAll(
[ValueProvider(typeof(HeaderValueProviderFactory<string>))] string sessionKey)
{
var responseMsg = this.ExceptionHandling(
() =>
{
var context = new BloggingSystemContext();
var user = context.Users.FirstOrDefault(usr => usr.SessionKey == sessionKey);
if (user == null)
{
throw new InvalidOperationException("Invalid username or password!");
}
var postsEntities = context.Posts;
var models =
(from postEntity in postsEntities
select new PostModel()
{
Id = postEntity.Id,
Title = postEntity.Title,
Text = postEntity.Text,
PostDate = postEntity.PostDate,
PostedBy = postEntity.User.Displayname,
Comments = (from commentEntity in postEntity.Comments
select new CommentModel()
{
Text = commentEntity.Text,
PostDate = commentEntity.PostDate,
CommentedBy = commentEntity.User.Displayname
}),
Tags = (from tagEntity in postEntity.Tags
select tagEntity.Name)
});
return models.OrderByDescending(p => p.PostDate);
});
return responseMsg;
}
public HttpResponseMessage LoginUser(UserModel model)
{
var context = new BloggingSystemContext();
var usernameLower = model.Username.ToLower();
var user = context.Users.FirstOrDefault(
usr => usr.Username == usernameLower ||
usr.AuthCode == model.AuthCode);
try
{
if (user == null)
{
throw new InvalidOperationException("Invalid username and/or password");
}
}
catch (Exception e)
{
var errorResponse = this.Request.CreateErrorResponse(HttpStatusCode.BadRequest, e.Message);
return errorResponse;
}
if (user.SessionKey == null)
{
user.SessionKey = this.GenerateSessionKey(user.UserId);
context.SaveChanges();
}
var loggedModel = new LoggedUserModel()
{
DisplayName = user.DisplayName,
SessionKey = user.SessionKey
};
var response = this.Request.CreateResponse(HttpStatusCode.Created, loggedModel);
return response;
}
public IQueryable<GetPostModel> GetPostByTag(
int tagId,
[ValueProvider(typeof(HeaderValueProviderFactory<string>))] string sessionKey)
{
var responseMsg = this.PerformOperationAndHandleExceptions(() =>
{
this.GetValidUser(sessionKey);
var context = new BloggingSystemContext();
var tag = context.Tags.Where(tg => tg.Id == tagId).FirstOrDefault();
var allModels = context.Posts.Where(ps => ps.Tags.Any(tg => tg.Id == tag.Id));
var filteredModels =
(from postEnt in allModels.ToList()
select new GetPostModel()
{
Id = postEnt.Id,
Title = postEnt.Title,
Text = postEnt.Text,
PostedBy = postEnt.User.DisplayName,
PostDate = postEnt.PostDate,
Tags = postEnt.Tags.Select(x => x.Title).ToArray(),
Comments =
from commentEnt in postEnt.Comments
select new CommentModel()
{
Text = commentEnt.Text,
PostDate = commentEnt.CommentDate,
CommentedBy = commentEnt.User.DisplayName
}
}).OrderByDescending(ps => ps.PostDate);
return filteredModels.AsQueryable();
});
return responseMsg;
}
public IQueryable<TagModel> GetAllTags(
[ValueProvider(typeof(HeaderValueProviderFactory<string>))] string sessionKey)
{
var responseMsg = this.PerformOperationAndHandleExceptions(() =>
{
this.GetValidUser(sessionKey);
var context = new BloggingSystemContext();
var models =
(from tagEnt in context.Tags
select new TagModel()
{
Id = tagEnt.Id,
Name = tagEnt.Title,
Posts = tagEnt.Posts.Count
}).OrderBy(tg => tg.Name);
return models;
});
return responseMsg;
}
public IEnumerable<PostModel> GetPosts(int tagID,
[ValueProvider(typeof(HeaderValueProviderFactory<string>))]string sessionKey)
{
var tagPosts = this.PerformOperation(() =>
{
UserValidator.ValidateSessionKey(sessionKey);
var context = new BloggingSystemContext();
using (context)
{
var loggedUserEntity = context.Users.FirstOrDefault<User>(u => u.SessionKey == sessionKey);
if (loggedUserEntity == null)
{
throw new InvalidOperationException("Invalid user or pasword!");
}
var tagEntity = context.Tags.Find(tagID);
if (tagEntity == null)
{
var errorResponse = this.Request.CreateErrorResponse(
HttpStatusCode.NotFound, "Tag with provided ID not found!");
throw new HttpResponseException(errorResponse);
}
var tagPostModels = new List<PostModel>();
var tagPostEntities = tagEntity.Posts.OrderByDescending(p => p.PostDate);
foreach (var tagPostEntity in tagPostEntities)
{
tagPostModels.Add(PostsMapper.ToModel(tagPostEntity));
}
return tagPostModels;
}
});
return tagPosts;
}
private void ClearDatabase()
{
var context = new BloggingSystemContext();
context.Database.ExecuteSqlCommand(@"
EXEC sp_msforeachtable 'ALTER TABLE ? NOCHECK CONSTRAINT all'
EXEC sp_MSForEachTable 'DELETE FROM ?'
exec sp_msforeachtable 'ALTER TABLE ? WITH CHECK CHECK CONSTRAINT all'");
}