Phlex::PDF

phlex-pdf.rb

require "bundler/inline"

gemfile do
  source "https://rubygems.org"

  gem "prawn"
  gem "zeitwerk"
  gem "matrix"
end

module Phlex
  class PDF
    include Prawn::View
    
    def call(pdf, &block)
      @document = pdf
      before_template if respond_to?(:before_template)
      view_template(&block)
      after_template if respond_to?(:after_template)
    end

    def render(component, &block)
      component.call(@document, &block)
      nil
    end

    def self.pdf(doc = Prawn::Document.new)
      new.call(doc)
      doc
    end
  end
end

class ApplicationComponent < Phlex::PDF
  def before_template
    text "Before #{self.class.name}"
  end

  def after_template
    text "After #{self.class.name}"
  end
end

class BoxComponent < ApplicationComponent
  def view_template
    text "I'm a box"
    yield
  end
end

class NoticeComponent < ApplicationComponent
  def view_template
    text "Hello World!"

    render BoxComponent.new do
      text "Look! I'm a box inside a box!"
    end
  end
end

NoticeComponent.pdf.render_file "poof.pdf"