public static void AddBookmarks(string username, string title, string url, string[] tags, string notes)
{
var dbCon = new BookmarksEntities();
using (dbCon)
{
var bookmark = new Bookmark();
bookmark.Notes = notes;
bookmark.URL = url;
bookmark.Title = title;
bookmark.User = CreateOrLoadUser(dbCon, username);
foreach (var tagName in tags)
{
var tag = CreateOrLoadTag(dbCon, tagName);
bookmark.Tags.Add(tag);
}
var titleTags = Regex.Split(title, @"[ ,-\.;!?]+");
foreach (var titleTag in titleTags)
{
var tag = CreateOrLoadTag(dbCon, titleTag);
bookmark.Tags.Add(tag);
}
dbCon.Bookmarks.Add(bookmark);
dbCon.SaveChanges();
}
}
private static User CreateOrLoadUser(BookmarksEntities context, string username)
{
var existingUser = (from u in context.Users
where u.Username.ToLower() == username.ToLower()
select u).FirstOrDefault();
if (existingUser != null)
{
return existingUser;
}
var newUser = new User();
newUser.Username = username;
context.Users.Add(newUser);
context.SaveChanges();
return newUser;
}
private static Tag CreateOrLoadTag(BookmarksEntities context, string tagName)
{
var existingTag = (from t in context.Tags
where t.Name.ToLower() == tagName.ToLower()
select t).FirstOrDefault();
if (existingTag != null)
{
return existingTag;
}
var newTag = new Tag();
newTag.Name = tagName.ToLower();
context.Tags.Add(newTag);
context.SaveChanges();
return newTag;
}
private static void InsertBookmarks(int count)
{
BookmarksEntities context = new BookmarksEntities();
var userIDs =
context.Users.Select(u => u.UserId).ToList();
for (int i = 0; i < count; i++)
{
Bookmark bookmark = new Bookmark();
bookmark.Title = "Title" + i;
bookmark.URL = "http://telerikacademy.com/bookmarks/" + i;
bookmark.UserId = userIDs[i % userIDs.Count];
context.Bookmarks.Add(bookmark);
}
context.SaveChanges();
}
private static Tag CreateOrLoadTag(BookmarksEntities context, string tagName)
{
var tag = context.Tags.FirstOrDefault(x => x.TagName == tagName);
if (tag != null)
{
return(tag);
}
var newTag = new Tag()
{
TagName = tagName
};
context.Tags.Add(newTag);
context.SaveChanges();
return(newTag);
}
private static User CreateOrLoadUser(BookmarksEntities context, string username)
{
var user = context.Users.FirstOrDefault(x => x.Username == username);
if (user != null)
{
return(user);
}
var newUser = new User()
{
Username = username
};
context.Users.Add(newUser);
context.SaveChanges();
return(newUser);
}
public static void InsertData(string username, string title, string url, string[] tags, string notes)
{
using (var scope = new TransactionScope(TransactionScopeOption.Required,
new TransactionOptions {
IsolationLevel = IsolationLevel.RepeatableRead
}))
{
var context = new BookmarksEntities();
User user = CreateOrLoadUser(context, username);
var bookmark = new Bookmark {
User = user, Title = title, Notes = notes, Url = url
};
foreach (var tagName in tags)
{
var tag = CreateOrLoadTag(context, tagName);
bookmark.Tags.Add(tag);
}
context.Bookmarks.Add(bookmark);
context.SaveChanges();
}
}
