public string GetMostRecentlyOpenedDiagram(string anonymousId)
{
using (var db = new CloudDiagramContext())
{
var anon = db.AnonymousByToken(anonymousId);
if (anon == null)
{
return(null);
}
var lastVisitedPublicId = anon.User.Visits.OrderByDescending(v => v.Id).Select(v => v.Diagram.PublicId).FirstOrDefault();
return(lastVisitedPublicId);
}
}
public void CreateNewDiagram(string anonymousId, object model)
{
using (var db = new CloudDiagramContext())
{
var anon = db.AnonymousByToken(anonymousId);
User user;
Workgroup workgroup;
if (anon == null)
{
var account = new Account();
db.Accounts.Add(account);
user = new User
{
Account = account
};
db.Users.Add(user);
workgroup = new Workgroup
{
Account = account,
Users = new[] { user }
};
db.Workgroups.Add(workgroup);
anon = new Anonymous {
Token = anonymousId, TokenHash = anonymousId.GetHashCode(), User = user
};
db.Anonymouses.Add(anon);
}
else
{
user = anon.User;
workgroup = user.Workgroups.First();
}
var diagram = new Diagram
{
CreatedBy = user,
PublicId = db.GeneratePublicId(),
Workgroup = workgroup,
Content = XmlMarshal.WriteContext(model)
};
db.Diagrams.Add(diagram);
db.DiagramVisits.Add(new DiagramVisit
{
Diagram = diagram,
VisitedBy = user,
When = DateTime.UtcNow,
Version = 1
});
db.DiagramChanges.Add(new DiagramChange
{
Diagram = diagram,
ChangedBy = user,
When = DateTime.UtcNow,
VersionBefore = 0,
VersionAfter = 1
});
db.SaveChanges();
}
}