public void CreatePost(ISession session, string Text, Guid UserID, List <string> Followers)
{
Guid postID = Guid.NewGuid();
TimeUuid UpdTime = TimeUuid.NewId(DateTimeOffset.Now);
var insertPost = session.Prepare(
"INSERT INTO Post (PostID, UserID, Text, UpdTime) VALUES(?,?,?, ?)");
session.Execute(insertPost.Bind(postID, UserID, Text, UpdTime));
var insertPostFollowers = session.Prepare(
"INSERT INTO post_followers (PostID, followers) VALUES(?,?)");
session.Execute(insertPostFollowers.Bind(postID, Followers));
PostC post = new PostC
{
PostID = postID,
UserID = UserID,
Text = Text,
UpdTime = UpdTime
};
_stream.SynchronizeStream(session, post);
}
public void UpdatePost(ISession session, PostC post)
{
TimeUuid UpdTime = TimeUuid.NewId(DateTimeOffset.Now);
var updatedPost = session.Prepare(
"Update Post set Text = ?, UpdTime=? where PostID = ?");
session.Execute(updatedPost.Bind(post.Text, UpdTime, post.PostID));
_stream.SynchronizeStream(session, post);
}
public void CreateComment(ISession session, PostC post, string Text, Guid UserID)
{
TimeUuid UpdTime = TimeUuid.NewId(DateTimeOffset.Now);
Guid CommentID = new Guid();
var addComment = session.Prepare(
"INSERT INTO comments (CommentID, PostID, UserID , Text, UpdTime) VALUES(?,?,?, ?)");
session.Execute(addComment.Bind(CommentID, post.PostID, UserID, Text, UpdTime));
var updatedPost = session.Prepare(
"Update Post set UpdTime=? where PostID = ?");
session.Execute(updatedPost.Bind(UpdTime, post.PostID));
_stream.SynchronizeStream(session, post);
}
public void SynchronizeStream(ISession session, PostC post)
{
// Get follower list
var getFollowerList = session.Prepare("Select followers from PostFollowers where PostID = ? ");
var listFollowers = session.Execute(getFollowerList.Bind(post.PostID));
List <string> Followers = new List <string>();
foreach (var follower in listFollowers)
{
Followers = follower.GetValue <List <string> >("followers");
}
//Delete post from user stream
var deletePost = session.Prepare("DELETE FROM UserStream where UserId =? and PostID = ?");
foreach (var follower in Followers)
{
session.Execute(deletePost.Bind(follower, post.PostID));
}
var getPosts = session.Prepare("Select * from Post where PostID = ? ");
var postsList = session.Execute(getPosts.Bind(post.PostID));
foreach (var post1 in postsList)
{
post.UserID = post1.GetValue <Guid>("UserID");
post.UpdTime = post1.GetValue <TimeUuid>("UpdTime");
post.Text = post1.GetValue <string>("Text");
}
//Get data from comments
List <CommentC> comments = new List <CommentC>();
var getComments = session.Prepare("Select comments from Post where PostID = ? ");
var listComments = session.Execute(getComments.Bind(post.PostID));
foreach (var commentRow in listComments)
{
CommentC comment = new CommentC()
{
CommentID = commentRow.GetValue <Guid>("CommentID"),
UserID = commentRow.GetValue <Guid>("UserID"),
Text = commentRow.GetValue <string>("Text"),
UpdTime = commentRow.GetValue <TimeUuid>("UpdTime")
};
comments.Add(comment);
}
//Insert post in user stream
var insertUserStream =
session.Prepare("INSERT INTO UserStream (UserID, PostID, Text, comments, UpdTime) VALUES(?,?,?,?,?,?)");
foreach (var follower in Followers)
{
session.Execute(insertUserStream.Bind(follower, post.PostID, post.Text, comments, post.UpdTime));
}
}
