Start with basic authentication

vote.rb

@@ -0,0 +1,59 @@
+require 'sinatra'
+require 'bcrypt'
+
+def hash_password(password)
+  BCrypt::Password.create(password).to_s
+end
+
+def verify_password(password, hash)
+  BCrypt::Password.new(hash) == password
+end
+
+User = Struct.new(:id, :email, :password_hash)
+USERS = [
+  User.new(1, 'P1', hash_password('P1')),
+  User.new(2, 'P2', hash_password('P2')),
+  User.new(3, 'P3', hash_password('P3')),
+]
+
+enable :sessions
+
+get '/' do
+  if current_user
+    erb :home
+  else
+    redirect '/login'
+  end
+end
+
+get '/login' do
+  erb :login
+end
+
+post '/login' do
+  puts params
+  user = USERS.find { |u| u.email == params[:email] }
+  if user && verify_password(params[:password], user.password_hash)
+    session.clear
+    session[:user_id] = user.id
+    redirect '/'
+  else
+    @error = 'Username or password was incorrect'
+    erb :login
+  end
+end
+
+post '/logout' do
+  session.clear
+  redirect '/login'
+end
+
+helpers do
+  def current_user
+    if session[:user_id]
+       USERS.find { |u| u.id == session[:user_id] }
+    else
+      nil
+    end
+  end
+end