TIL - Today I Learned

5-17-17

Today I learned how to add authentication to my rails app.

```ruby
get '/login' => 'sessions#new'
  post '/login' => 'sessions#create'
  get '/logout' => 'sessions#destroy'

  def new
  end

  def create
    user = User.find_by(email: params[:email])
    if user && user.authenticate(params[:password])
      session[:user_id] = user.id
      flash[:success] = 'Successfully logged in'
      redirect_to'/'
    else
      flash[:warning] = 'Invlaid email or password'
      redirect_to'/login'
    end
  end

  def destroy
    session[:user_id] = nil
    flash[:success] = 'Successfully logged out'
    redirect_to'/login'
  end

  <h1>Log In</h1>

<%= form_tag "/login", method: :post do %>
  <div>
   <%= label_tag :email %>
    <%= email_field_tag :email %>
  </div>
  <div>
   <%= label_tag :password %>
   <%= password_field_tag :password %>
  </div>
  <%= submit_tag "log In" %>
<% end %>

<h1>Signup!</h1>
<%= form_tag '/users', method: :post do  %>
<div>
  Name: <input type="text" name="name">
</div>
<div>
  Email: <input type="email" name="email">
</div>
<div>
  Password: <input type="password" name="password">
</div>
<div>
  Confirm Passowrd: <input type="password" name="password_confirmation">
</div>
<input type="submit" value="Submit">
<% end %>
```