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module SessionsHelper
def sign_in(user)
#create a new remember token
remember_token = User.new_remember_token
#place token inside of the browser
cookies.permanent[:remember_token] = remember_token
#save the hashed token to the database
user.update_attribute(:remember_token,
User.hash(remember_token))
#set the current user to be the given user
self.current_user = user
end
# The curret_user=(user) is the conversion of self.current_user = user
def current_user=(user)
@current_user = user
end
# sets the @current_user instance virable to the user corresponding
# to the remember token, but only if @current_user is undefined
# since the remember token is hashed, we need to hash the cookie
# to find match the remember token
def current_user
remember_token = User.hash(cookies[:remember_token])
@current_user ||= User.find_by(remember_token: remember_token)
end
# checks if someone is currently signed in
def signed_in?
!current_user.nil?
end
def sign_out
current_user.update_attribute(:remember_token, User.hash(User.new_remember_token))
cookies.delete(:remember_token)
self.current_user = nil
end
# This is for anyone that cares about how long a user is signed
# in:
#
# Currently I have a user to be signed in forever unless they
# log out (cookies.permanent....).
#
# If you want to change that, change line 7 to this:
#
# cookies[:remember_token] = { value: remember_token,
# expires: 20.years.from_now.utc }
#
# which will expire the cookie in 20 years from its date of
# creation.
#
# Oddly enough, this line above is equivalent to the:
#
# cookies.permanent
#
# This is just a short cut for this line since most people
# create permanent cookies these days.
#
# Other times are:
#
# 10.weeks.from_now
#
# 5.days.ago
#
# etc...
end
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