//set parentId to 0 when it is at the top level
public fTag CreateFTag(int parentId, string value)
{
fTag tag = new fTag();
tag.value = value;
tag.owner = parentId;
try
{
VestnDB db = new VestnDB();
db.fTag.Add(tag);
db.SaveChanges();
}
catch (InvalidOperationException)
{
return null;//bad id
}
return (tag);
}
public fTag DeleteFTag(fTag tag)
{
return tagAccessor.DeleteFTag(tag);
}
public fTag UpdateFTag(fTag tag)
{
return tagAccessor.UpdateFTag(tag);
}
private fTag GetEntityFTag(string value)
{
VestnDB db = new VestnDB();
fTag tag = new fTag();
try
{
tag = db.fTag.Where(u => u.value == value).First();
}
catch (Exception e)
{
return null;
}
return tag;
}
public fTag UpdateFTag(fTag tag)
{
fTag oldTag = GetFTag(tag.id);
if (oldTag.value != tag.value)
{
return tag;
}
try
{
VestnDB db = new VestnDB();
db.Entry(tag).State = EntityState.Modified;
db.SaveChanges();
}
catch (InvalidOperationException)
{
return null;
}
return tag;
}
public fTag DeleteFTag(fTag tag)
{
VestnDB db = new VestnDB();
db.fTag.Attach(tag);
tag = db.fTag.Remove(tag);
db.SaveChanges();
return tag;
}