class Powersnap

Attributes

prefix[RW]
urls[RW]

Public Class Methods

default_powersnap_config() click to toggle source
# File lib/powersnap.rb, line 9
def default_powersnap_config
  { "prefix" => nil }
end
new(urls, prefix: nil) click to toggle source
# File lib/powersnap.rb, line 14
def initialize(urls, prefix: nil)
  prefix ||= self.class.powersnap_config["prefix"]
  @urls = urls.map { |url| URI.encode(url) }
  @prefix = prefix
end
powersnap_config() click to toggle source
# File lib/powersnap.rb, line 5
def powersnap_config
  @system_prefix ||= (File.exist?("powersnap.yml") ? YAML.load_file("powersnap.yml") : default_powersnap_config)
end

Public Instance Methods

generate(dir: ".", width: 768, height: 1024, pattern: "image-{index}.png", zoom: 1.0, page: false, quality: 100, css: nil) click to toggle source
# File lib/powersnap.rb, line 20
def generate(dir: ".", width: 768, height: 1024, pattern: "image-{index}.png", zoom: 1.0, page: false, quality: 100, css: nil)
  extension = File.extname(pattern)
  if extension == ".jpg"
    format = "jpeg"
  elsif extension == ".png"
    format = "png"
  else
    raise "Invalid file extension: #{extension}"
  end
  cmd = "#{@prefix} powersnap -j -d \"#{dir}\" -t \"#{format}\" -q #{quality} -z #{zoom} #{page ? '--page' : ''} -w #{width.to_i} -h #{height.to_i} #{(css and "-c #{css}")} -f \"#{pattern}\" #{@urls.join(' ')}"
  json_response = `#{cmd}`
  JSON.parse(json_response) rescue { "status" => "error" }
end