module Devise::Models::Lockable::ClassMethods

def lock_strategy_enabled?(strategy)

Is the lock enabled for the given lock strategy? 
def lock_strategy_enabled?(strategy)
  self.lock_strategy == strategy
end

def send_unlock_instructions(attributes = {})

Options must contain the user's unlock keys
with an email not found error.
unlock instructions to it. If not user is found, returns a new user
Attempt to find a user by its unlock keys. If a record is found, send new 
def send_unlock_instructions(attributes = {})
  lockable = find_or_initialize_with_errors(unlock_keys, attributes, :not_found)
  lockable.resend_unlock_instructions if lockable.persisted?
  lockable
end

def unlock_access_by_token(unlock_token)

Options must have the unlock_token
If the user is not locked, creates an error for the user
If no user is found, returns a new user with an error.
Find a user by its unlock token and try to unlock it. 
def unlock_access_by_token(unlock_token)
  original_token = unlock_token
  unlock_token   = Devise.token_generator.digest(self, :unlock_token, unlock_token)
  lockable = find_or_initialize_with_error_by(:unlock_token, unlock_token)
  lockable.unlock_access! if lockable.persisted?
  lockable.unlock_token = original_token
  lockable
end

def unlock_strategy_enabled?(strategy)

Is the unlock enabled for the given unlock strategy? 
def unlock_strategy_enabled?(strategy)
  self.unlock_strategy == strategy ||
    (self.unlock_strategy == :both && BOTH_STRATEGIES.include?(strategy))
end