1 files changed, 65 insertions, 0 deletions
diff --git a/app/helpers/sessions_helper.rb b/app/helpers/sessions_helper.rb
index 309f8b2..499e988 100644
--- a/app/helpers/sessions_helper.rb
+++ b/app/helpers/sessions_helper.rb
@@ -1,2 +1,67 @@
+require 'user'
+
 module SessionsHelper
+	def sign_in(user)
+		@session = Session.new(user: user)
+		raw_token = @session.create_token
+		@session.save # FIXME: error handling
+
+		@token = Session.hash_token(raw_token)
+		cookies.permanent[:remember_token] = { value: raw_token, expires: 20.minutes.from_now.utc }
+
+		#set the current user to be the given 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
+		@token ||= Session.hash_token(cookies[:remember_token])
+		@session ||= Session.find_by(token: @token)
+		@current_user ||= (@session.nil? ? User::NilUser.new : @session.user)
+	end
+
+	# checks if someone is currently signed in
+	def signed_in?
+		!current_user.nil?
+	end
+
+	def sign_out
+		if signed_in?
+			@session.destroy
+		end
+		@current_user = User::NilUser.new
+		cookies.delete(:remember_token)
+	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