public IOrderedQueryable <PostDto> FilterByTags(string tags)
{
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.");
}
string[] tagsSpecified = tags.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
var posts = context.Posts
.Include(p => p.Tags)
.Include(p => p.Comments)
.Where(p => tagsSpecified.All(s => p.Tags.Any(t => string.Compare(t.Name, s, true) == 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 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 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 HttpResponseMessage CreateComment(int postId, [FromBody] CommentDto value)
{
try
{
var sessionKey = ApiControllerHelper.GetHeaderValue(Request.Headers, "X-SessionKey");
if (sessionKey == null)
{
throw new ArgumentNullException("No session key provided in the request header!");
}
Validate(value.Text, "text");
var context = new BloggingSystemContext();
using (context)
{
var user = context.Users.FirstOrDefault(u => u.SessionKey == sessionKey);
if (user == null)
{
throw new ArgumentException("Users must be logged in to leave comments!");
}
var post = context.Posts.FirstOrDefault(p => p.Id == postId);
if (post == null)
{
throw new ArgumentException("Invalid post id: " + postId);
}
var newComment = new Comment()
{
Text = value.Text,
PostDate = DateTime.Now,
Author = user,
Post = post
};
context.Comments.Add(newComment);
context.SaveChanges();
var response = Request.CreateResponse(HttpStatusCode.OK);
return(response);
}
}
catch (Exception ex)
{
var errorResponse = Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex.Message);
throw new HttpResponseException(errorResponse);
}
}
public HttpResponseMessage LogoutUser()
{
BloggingSystemContext context = null;
try
{
string sessionKey = ApiControllerHelper.GetHeaderValue(Request.Headers, "X-SessionKey");
if (sessionKey == null)
{
throw new ArgumentNullException("No session key provided in the request header!");
}
context = new BloggingSystemContext();
var user = context.Users.FirstOrDefault(u => u.SessionKey == sessionKey);
if (user.SessionKey == null)
{
throw new ArgumentNullException("User is already logged out!");
}
user.SessionKey = null;
context.SaveChanges();
var response = Request.CreateResponse(HttpStatusCode.OK);
return(response);
}
catch (Exception ex)
{
var errorResponse = Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex.Message);
throw new HttpResponseException(errorResponse);
}
finally
{
if (context != null)
{
context.Dispose();
}
}
}
public HttpResponseMessage CreatePost(CreatePostDto value)
{
try
{
var sessionKey = ApiControllerHelper.GetHeaderValue(Request.Headers, "X-SessionKey");
if (sessionKey == null)
{
throw new ArgumentNullException("No session key provided in the request header!");
}
Validate(value.Title, "title");
Validate(value.Text, "text");
var context = new BloggingSystemContext();
using (context)
{
var user = context.Users.FirstOrDefault(u => u.SessionKey == sessionKey);
if (user == null)
{
throw new ArgumentException("Users must be logged in to create posts!");
}
var newPost = new Post()
{
Title = value.Title,
Text = value.Text,
PostDate = DateTime.Now,
Author = user
};
string[] tagsFromTitle = value.Title.Split(
new char[] { ' ', ',', '.', ';', '!', '?', ':' },
StringSplitOptions.RemoveEmptyEntries);
List <string> tagsToCheck = new List <string>();
foreach (var tagFromTitle in tagsFromTitle)
{
tagsToCheck.Add(tagFromTitle);
}
if (value.Tags != null)
{
foreach (string tagName in value.Tags)
{
tagsToCheck.Add(tagName);
}
}
foreach (string tagName in tagsToCheck)
{
var matchingTag = context.Tags.FirstOrDefault(t => string.Compare(t.Name, tagName, true) == 0);
if (matchingTag == null)
{
// tag not found, insert it in the database
matchingTag = new Tag
{
Name = tagName.ToLower()
};
context.Tags.Add(matchingTag);
context.SaveChanges();
}
newPost.Tags.Add(matchingTag);
}
context.Posts.Add(newPost);
context.SaveChanges();
var createdPostDto = new CreatePostDto()
{
Id = newPost.Id,
Title = newPost.Title,
Tags = newPost.Tags.Select(t => t.Name),
Text = newPost.Text
};
var response = Request.CreateResponse(HttpStatusCode.Created, createdPostDto);
return(response);
}
}
catch (Exception ex)
{
var errorResponse = Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex.Message);
throw new HttpResponseException(errorResponse);
}
}