Concepts of modular tonton web application that share authentication

Gemfile

@@ -4,4 +4,8 @@ gem 'sinatra'
 gem 'liquid'
 gem 'sinatra-flash'
 gem 'puma'
-gem 'sod'
+gem 'sod'
+gem 'gollum'
+gem 'bcrypt'
+gem 'sqlite3'
+gem 'warden'

config.ru

@@ -1,12 +1,13 @@
-require_relative 'app'
+require_relative 'example/app'
+require_relative 'example/modules/module'
 
 # Require TonTon modules if you want
 
 use Rack::Session::Cookie, key: 'rack.session', secret: ENV.fetch('SESSION_SECRET')
 
 app = Rack::URLMap.new(
-	'/' => TonTonWeb::App.new
-	# Add TonTon modules here
+	'/' => ExampleApp.new,
+	'/module' => ExampleModule.new
 )
 
 run app

example/app.rb

@@ -1,18 +1,5 @@
-require 'gollum/app'
-require 'sinatra/flash'
-require "sqlite3"
-require 'tonton_web'
+require_relative '../lib/tonton_web'
 
-class TonTonWeb::App < Sinatra::Base
-	set :host_authorization, { permitted_hosts: ['localhost', 'mytonton.com.br'] }
-
-	set :sessions, true
-
-	get '/' do
-		redirect "/readme.md"
-	end
-
-	get '/:name' do
-		markdown File.read(params['name']), layout_engine: :erb, layout: true
-	end
+class ExampleApp < TonTonWeb::App
+	set :root, Pathname.new(__FILE__).parent.parent
 end

lib/tonton_web.rb

@@ -1 +1,4 @@
-require_relative 'tonton_web/auth'
+require_relative 'tonton_web/auth'
+require_relative 'tonton_web/sinatra-auth'
+require_relative 'tonton_web/app'
+require_relative 'tonton_web/module'

lib/tonton_web/app.rb

@@ -0,0 +1,109 @@
+require_relative 'auth'
+require "warden"
+require 'sinatra/flash'
+
+Warden::Manager.serialize_from_session do |id|
+	TonTonWeb::App.find_user id: id
+end
+
+Warden::Manager.serialize_into_session do |user|
+	user.id
+end
+
+Warden::Manager.before_failure do |env,opts|
+	env['REQUEST_METHOD'] = "POST"
+
+	env['rack.session']['warden.options'] = opts
+end
+
+Warden::Strategies.add(:password) do
+	def valid?
+		params['user'] && params['user']['username'] && params['user']['password']
+	end
+
+	def authenticate!
+		user_params = params['user']
+
+		user = TonTonWeb::App.authenticate user_params['username'], user_params['password']
+
+		if not user
+			throw(:warden)
+		else
+			success!(user)
+		end
+	end
+end
+
+class TonTonWeb::App < Sinatra::Base
+	@db = SQLite3::Database.new(Dir.getwd + '/database.sqlite')
+
+	register Sinatra::Flash
+	register TonTonWeb::Auth
+
+	use Warden::Manager do |manager|
+		manager.default_strategies :password
+
+		manager.failure_app = self
+
+		manager.scope_defaults :default, strategies: [:password], action: 'unauthenticated'
+	end
+
+	helpers do
+		def check_authentication
+			if not env['warden'].authenticated?
+				flash[:error] = 'You must log in to access this page.'
+
+				redirect '/login'
+			end
+		end
+
+		def current_user
+			env['warden'].user
+		end
+	end
+
+	set :host_authorization, { permitted_hosts: ['localhost', 'mytonton.com.br'] }
+
+	get '/' do
+		redirect "/readme.md"
+	end
+
+	get '/status' do
+		puts env['warden']
+		check_authentication
+		"Hello"
+	end
+
+	post '/unauthenticated' do
+		session['warden.return_to'] = env['warden.options'][:attempted_path]
+
+		flash[:error] = 'You must log in to access this page.'
+
+		redirect '/login'
+	end
+ 
+	get '/login' do
+		@error = flash[:error]
+
+		erb :login
+	end
+	
+	post '/login' do
+		env['warden'].authenticate!
+
+		if env['warden'].authenticated?
+			redirect_path = session.delete('warden.return_to') || '/'
+
+			redirect redirect_path
+		else
+			redirect '/login' 
+		end
+	end
+	
+	get '/logout' do
+		env['warden'].logout
+
+		redirect '/'
+	end
+
+end

lib/tonton_web/auth.rb

@@ -4,70 +4,63 @@ require 'bcrypt'
 
 module TonTonWeb
 	User = Struct.new(:id, :name, :username, :email, :password_digest)
+end
 
-	class Auth
-		attr_reader :root
+module TonTonWeb::Auth
+	def create_tables
+		@db.execute "create table users (id integer primary key, name text, username text, email text, password_digest text);"
+	end
 
-		def initialize root_path
-			@root = Pathname.new root_path
+	def create_user **options
+		name = options.fetch :name
+		username = options.fetch :username
+		email = options.fetch :email
+		password = options.fetch :password
 
-			@db = SQLite3::Database.new(@root+ 'database.sqlite')
+		# Assert user doesn't exists
+
+		hashed_password = BCrypt::Password.create(password)
+
+		@db.execute(
+			"insert into users (name, username, email, password_digest) values (?,?,?,?);",
+			[name, username, email, hashed_password]
+		)
+
+		return # Return user
+	end
+
+	def delete_user id
+		@db.execute "delete from users where id = ?;", id
+	end
+
+	def find_user **options
+		id = options[:id]
+		name = options[:name]
+		username = options[:username]
+		email = options[:email]
+
+		if not (id or name or username or email)
+			raise "No options to find user."
 		end
 
-		def create_tables
-			@db.execute "create table users (id integer primary key, name text, username text, email text, password_digest text);"
+		user = nil
+
+		user_query_template = "select id, name, username, email, password_digest from users where id = ? or name = ? or username = ? or email = ?"
+
+		@db.execute(user_query_template, [id, name, username, email]) do |row|
+			user = TonTonWeb::User.new(*row)
 		end
 
-		def create_user **options
-			name = options.fetch :name
-			username = options.fetch :username
-			email = options.fetch :email
-			password = options.fetch :password
+		return user
+	end
 
-			# Assert user doesn't exists
-
-			hashed_password = BCrypt::Password.create(password)
-
-			@db.execute(
-				"insert into users (name, username, email, password_digest) values (?,?,?,?);",
-				[name, username, email, password]
-			)
-
-			return # Return user
-		end
-
-		def delete_user id
-			@db.execute "delete from users where id = ?;", id
-		end
-
-		def find_user **options
-			name = options[:name]
-			username = options[:username]
-			email = options[:email]
-
-			if not (name or username or email)
-				raise "No options to find user."
-			end
-
-			user = nil
-
-			user_query_template = "select id, name, username, email, password_digest from users where name = ? or username = ? or email = ?"
-
-			@db.execute(user_query_template, [name, username, email]) do |row|
-				user = TonTonWeb::User.new(*row)
-			end
+	def authenticate username, password
+		user = find_user(username: username)
 
+		if BCrypt::Password.new(user.password_digest) == password
 			return user
-		end
-
-		def authenticate username, password
-			user = find_user(username: username)
-
-			if BCrypt::Password.new(user.password_digest) == password
-				return user
-			else
-				return false
-			end
+		else
+			return false
 		end
 	end
 end

views/login.erb

@@ -0,0 +1,20 @@
+<h2>Login</h2>
+<% if @error %>
+  <p style="color: red; font-weight: bold;">
+    <%= @error %>
+  </p>
+<% end %>
+
+<form method="POST" action="/login">
+  <div>
+    <label for="username">Username:</label>
+    <input type="text" id="username" name="user[username]" required>
+  </div>
+  <br>
+  <div>
+    <label for="password">Password:</label>
+    <input type="password" id="password" name="user[password]" required>
+  </div>
+  <br>
+  <button type="submit">Log In</button>
+</form>