// AddUser adds a user to the state.
func (st *State) AddUser(name, password string) (*User, error) {
if !names.IsUser(name) {
return nil, fmt.Errorf("invalid user name %q", name)
}
salt, err := utils.RandomSalt()
if err != nil {
return nil, err
}
u := &User{
st: st,
doc: userDoc{
Name: name,
PasswordHash: utils.UserPasswordHash(password, salt),
PasswordSalt: salt,
},
}
ops := []txn.Op{{
C: st.users.Name,
Id: name,
Assert: txn.DocMissing,
Insert: &u.doc,
}}
err = st.runTransaction(ops)
if err == txn.ErrAborted {
err = fmt.Errorf("user already exists")
}
if err != nil {
return nil, err
}
return u, nil
}
// IsValidUser returns whether user is a valid username in charm URLs.
func IsValidUser(user string) bool {
return names.IsUser(user)
}