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151 lines
5 KiB
Ruby
151 lines
5 KiB
Ruby
require 'devise/models/activatable'
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module Devise
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module Models
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# Handles blocking a user access after a certain number of attempts.
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# Lockable accepts two different strategies to unlock a user after it's
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# blocked: email and time. The former will send an email to the user when
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# the lock happens, containing a link to unlock it's account. The second
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# will unlock the user automatically after some configured time (ie 2.hours).
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# It's also possible to setup lockable to use both email and time strategies.
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#
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# Configuration:
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#
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# maximum_attempts: how many attempts should be accepted before blocking the user.
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# unlock_strategy: unlock the user account by :time, :email or :both.
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# unlock_in: the time you want to lock the user after to lock happens. Only
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# available when unlock_strategy is :time or :both.
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#
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module Lockable
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extend ActiveSupport::Concern
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include Devise::Models::Activatable
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# Lock an user setting it's locked_at to actual time.
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def lock_access!
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self.locked_at = Time.now
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if unlock_strategy_enabled?(:email)
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generate_unlock_token
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send_unlock_instructions
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end
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save(:validate => false)
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end
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# Unlock an user by cleaning locket_at and failed_attempts.
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def unlock_access!
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if_access_locked do
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self.locked_at = nil
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self.failed_attempts = 0
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self.unlock_token = nil
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save(:validate => false)
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end
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end
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# Verifies whether a user is locked or not.
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def access_locked?
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locked_at && !lock_expired?
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end
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# Send unlock instructions by email
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def send_unlock_instructions
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::Devise::Mailer.unlock_instructions(self).deliver
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end
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# Resend the unlock instructions if the user is locked.
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def resend_unlock_token
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if_access_locked do
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generate_unlock_token unless unlock_token.present?
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save(:validate => false)
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send_unlock_instructions
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end
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end
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# Overwrites active? from Devise::Models::Activatable for locking purposes
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# by verifying whether an user is active to sign in or not based on locked?
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def active?
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super && !access_locked?
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end
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# Overwrites invalid_message from Devise::Models::Authenticatable to define
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# the correct reason for blocking the sign in.
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def inactive_message
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access_locked? ? :locked : super
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end
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# Overwrites valid_for_authentication? from Devise::Models::Authenticatable
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# for verifying whether an user is allowed to sign in or not. If the user
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# is locked, it should never be allowed.
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def valid_for_authentication?(attributes)
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if result = super
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self.failed_attempts = 0
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else
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self.failed_attempts += 1
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if failed_attempts > self.class.maximum_attempts
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lock_access!
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return false
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end
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end
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save(:validate => false) if changed?
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result
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end
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protected
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# Generates unlock token
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def generate_unlock_token
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self.unlock_token = Devise.friendly_token
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end
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# Tells if the lock is expired if :time unlock strategy is active
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def lock_expired?
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if unlock_strategy_enabled?(:time)
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locked_at && locked_at < self.class.unlock_in.ago
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else
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false
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end
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end
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# Checks whether the record is locked or not, yielding to the block
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# if it's locked, otherwise adds an error to email.
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def if_access_locked
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if access_locked?
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yield
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else
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self.errors.add(:email, :not_locked)
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false
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end
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end
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# Is the unlock enabled for the given unlock strategy?
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def unlock_strategy_enabled?(strategy)
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[:both, strategy].include?(self.class.unlock_strategy)
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end
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module ClassMethods
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# Attempt to find a user by it's email. If a record is found, send new
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# unlock instructions to it. If not user is found, returns a new user
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# with an email not found error.
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# Options must contain the user email
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def send_unlock_instructions(attributes={})
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lockable = find_or_initialize_with_error_by(:email, attributes[:email], :not_found)
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lockable.resend_unlock_token unless lockable.new_record?
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lockable
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end
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# Find a user by it's unlock token and try to unlock it.
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# If no user is found, returns a new user with an error.
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# If the user is not locked, creates an error for the user
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# Options must have the unlock_token
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def unlock_access_by_token(unlock_token)
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lockable = find_or_initialize_with_error_by(:unlock_token, unlock_token)
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lockable.unlock_access! unless lockable.new_record?
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lockable
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end
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Devise::Models.config(self, :maximum_attempts, :unlock_strategy, :unlock_in)
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end
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end
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end
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end
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