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gem 'prawn'

// Recipie Model
def shopping_list_pdf
  shopping_list = ingredients.map do |ingredient|
      [ingredient.name, ingredient.quantity]
  end
  
  pdf = Prawn::Document.new
  pdf.table([[ "Item", "Quantity" ], *shopping_list]) do |t|
    t.header = true
    t.row_colors = [ "aaaaff", "aaffaa", "ffaaaa" ]
    t.row(0).style :background_color => '448844', :text_color => 'ffffff' t.columns(1).align = :right
    end
    pdf.render
end

// Recipie Controller
def shopping_list
  @recipe = Recipe.find(params[:id]) 
  respond_to do |format|
    format.html format.pdf do
      send_data @recipe.shopping_list_pdf,
        content_type: Mime::PDF
    end
  end
end


// Routes
resources :recipes do
  member do
    get "shopping_list"
  end
  resources :ingredients
end