A simple file I have in my static site generator root that loops through all pages and generates opengraph images using Bannerbear

Rakefile.rb

require 'httparty'
require 'open-uri'

namespace :bannerbear do
  task :generate do
  	puts "Starting json request"
  	response = HTTParty.get(ENV['LOCAL_BB_SITE_ALL_POSTS'])
  	begin
  		json = JSON.parse response.body
      puts "Number of pages: #{json.size}"
  	  json.each_with_index do |page,i|
  	  	puts "#{i} ---------------------------------------"
  	  	puts "Checking file exists for"
  	  	path = './source/images/opengraph/' + page['image_url']
  	  	puts path
  	  	if !File.file?(path)
  	  		puts "File doesn't exists, lets create!"

  	  		general_template_id = ENV['BB_SITE_GENERAL_OG_TEMPLATE']
          blog_template_id = ENV['BB_SITE_BLOG_OG_TEMPLATE']

          template = general_template_id

          mods = [
            {
              :name => "title",
              :text => page['title']
            }
          ]

          if page['blog_date']
            template = blog_template_id
            mods = [
              {
                :name => "title",
                :text => page['title']
              },
              {
                :name => "date",
                :text => page['blog_date']
              }
            ]
          end

  	  		payload = {
  	  			:template => template,
  	  			:modifications => mods,
  	  		}
  	  		puts "Creating Bannerbear API request"
  	  		puts payload

  	  		response = HTTParty.post("https://api.bannerbear.com/v2/images", {
  	  			body: payload,
  	  			headers: {"Authorization" => "Bearer #{ENV['BANNERBEAR_SOCIAL_MEDIA_PROJECT_API_KEY']}"}
  	  		})
  	  		image_json = JSON.parse response.body
  	  		counter = 1
  	  		#poll for image to complete
  	  		5.times do |attempt|
  	  			puts "Attempt #{attempt}"
  	  			counter = counter+1
  	  			response = HTTParty.get(image_json['self'], {
  	  				headers: {"Authorization" => "Bearer #{ENV['BANNERBEAR_SOCIAL_MEDIA_PROJECT_API_KEY']}"}
  	  			})
  	  			image_json = JSON.parse response.body
  	  			if image_json['image_url_png']
  	  				puts "Image generated!"
  	  				puts image_json['image_url_png']

  	  				download = open(image_json['image_url_png'])
  	  				IO.copy_stream(download, path)

  	  				break
  	  			end
  	  			sleep 1
  	  		end

  	  		if !image_json['image_url_png']
  	  			puts "Failed to generate image in 5 attempts"
  	  		end

  	  	end

  	  	puts "Moving to next page..."

  	  end  	  
  	rescue => e
  	  puts "Rescued #{e.inspect}"
  	end

  end
end