public void CreatePost(PostDTOCassandra post, string username)
{
var session = _cluster.Connect();
var newPost = session.Prepare("INSERT INTO posts (PostID, Username ,Text, Date) VALUES(?,?,?, ?)");
session.Execute(newPost.Bind(post.PostID, username, post.Text, DateTime.Now));
_stream.SynchronizeStream(session, post);
}
private void DeletePost(PostDTOCassandra post, ISession session, List <string> list)
{
var deletePost = session.Prepare("DELETE FROM user_stream where user_id =? and last_updated_at = ?");
foreach (var follower in list)
{
session.Execute(deletePost.Bind(follower, DateTime.Now));
}
}
private void AddTostream(ISession session, PostDTOCassandra post, List <string> list, List <CommentDTOCassandra> comments)
{
var Stream =
session.Prepare("INSERT INTO user_stream (Username, Date , PostID , UserID , Text, Comments) VALUES(?,?,?,?,?,?)");
foreach (var follower in list)
{
session.Execute(Stream.Bind(follower, DateTime.Now, post.PostID, post.username, post.Text, comments));
}
}
public void GetPosts(PostDTOCassandra post, ISession session, List <string> list)
{
var getPosts = session.Prepare("Select * from posts where Username = ? ");
var postsList = session.Execute(getPosts.Bind(post.username)).ToList();
foreach (var post1 in postsList)
{
post.username = post1.GetValue <string>("Username");
post.Date = post1.GetValue <DateTime>("Date");
post.Text = post1.GetValue <string>("Text");
}
}
private void GetFollwers(PostDTOCassandra post, ISession session, List <string> list)
{
var getFollowerList = session.Prepare("Select followers from Followers where PostID = ? ");
var Followers = session.Execute(getFollowerList.Bind(post.PostID));
list = new List <string>();
foreach (var follower in Followers)
{
list = follower.GetValue <List <string> >("followers");
}
}
public void UpdatePost(PostDTOCassandra post, string username)
{
var session = _cluster.Connect();
var getDate = session.Prepare("Select Date from posts where PostID = ? ");
var updatedPost = session.Prepare(
"Update posts set Text = ?, Date=? where PostID = ?");
session.Execute(updatedPost.Bind(post.Text, DateTime.Now));
_stream.SynchronizeStream(session, post);
}
public void SynchronizeStream(ISession session, PostDTOCassandra post)
{
session = _cluster.Connect();
List <string> list = new List <string>();
List <CommentDTOCassandra> comments = new List <CommentDTOCassandra>();
GetFollwers(post, session, list);
DeletePost(post, session, list);
GetPosts(post, session, list);
GetComments(comments, post.PostID, session, list);
AddTostream(session, post, list, comments);
}
public void CreateComment(PostDTOCassandra post, CommentDTOCassandra comment, string username)
{
var session = _cluster.Connect();
var addComment = session.Prepare(
"INSERT INTO comments (PostID, CommentID, Text, UserID) VALUES(?,?,?, ?)");
session.Execute(addComment.Bind(comment.PostID, comment.CommentID, comment.Text, comment.UserID));
var updatedPost = session.Prepare(
"Update posts set Date=? where PostID = ?");
session.Execute(updatedPost.Bind(comment.CommentID, comment.PostID));
_stream.SynchronizeStream(session, post);
}
public void SyncronizeComment(PostDTOCassandra post, CommentDTOCassandra comment, string username)
{
_streamData.CreateComment(post, comment, username);
}
public void SyncronizeExistingPost(PostDTOCassandra post, string username)
{
_streamData.UpdatePost(post, username);
}
public void SyncronizeNewPost(PostDTOCassandra post, string username)
{
_streamData.CreatePost(post, username);
}
public void SynchronizeStream(PostDTOCassandra post, ISession session)
{
_stream.SynchronizeStream(session, post);
}
