class FaviconGenerator

# File lib/generators/favicon_generator.rb, line 15
def generate_favicon
  if File.exist?('config/favicon.yml') && defined?(Rails.application.config_for)
    req = Rails.application.config_for(:favicon)
  else
    req = JSON.parse File.read('config/favicon.json')
  end

  req['api_key'] = API_KEY

  req['files_location'] = Hash.new
  req['files_location']['type'] = 'path'
  req['files_location']['path'] = PATH_UNIQUE_KEY

  master_pic = File.expand_path(".") + '/' + req['master_picture']
  req['master_picture'] = Hash.new
  req['master_picture']['type'] = 'inline'
  req['master_picture']['content'] = Base64.encode64(File.binread(master_pic))

  uri = URI.parse("https://realfavicongenerator.net/api/favicon")
  timeout = options[:timeout]
  resp = Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme == "https", read_timeout: timeout) do |http|
    request = Net::HTTP::Post.new uri
    request.body = { favicon_generation: req }.to_json
    request["Content-Type"] = "application/json"
    begin
      JSON.parse(http.request(request).body)
    rescue Net::ReadTimeout
      raise RuntimeError.new("Operation timed out after #{timeout} seconds, pass a `-t` option for a longer timeout")
    end
  end

  zip = resp['favicon_generation_result']['favicon']['package_url']
  FileUtils.mkdir_p('app/assets/images/favicon')

  Dir.mktmpdir 'rfg' do |tmp_dir|
    download_package zip, tmp_dir
    Dir["#{tmp_dir}/*.*"].each do |file|
      content = File.binread(file)
      new_ext = ''
      if File.extname(file) == '.json' or File.extname(file) == '.xml' or File.extname(file) == '.webmanifest'
        content = replace_url_by_asset_path content
        new_ext = '.erb'
      end
      create_file "app/assets/images/favicon/#{File.basename file}#{new_ext}", content
    end
  end

  create_file "app/views/application/_favicon.html.erb",
    replace_url_by_asset_path(resp['favicon_generation_result']['favicon']['html_code'])

    create_file "config/initializers/web_app_manifest.rb",
      File.read(File.dirname(__FILE__) + '/web_app_manifest_initializer.txt')
end

# File lib/generators/favicon_generator.rb, line 78
def download_file(url, local_path)
  if File.directory?(local_path)
    uri = URI.parse(url)
    local_path += '/' + File.basename(uri.path)
  end

  File.open(local_path, "wb") do |saved_file|
    URI.open(url, "rb") do |read_file|
      saved_file.write(read_file.read)
    end
  end
end

# File lib/generators/favicon_generator.rb, line 71
def download_package(package_url, output_dir)
  file = Tempfile.new('fav_package')
  file.close
  download_file package_url, file.path
  extract_zip file.path(), output_dir
end

# File lib/generators/favicon_generator.rb, line 91
def extract_zip(zip_path, output_dir)
  Zip::File.open zip_path do |zip_file|
    zip_file.each do |f|
      f_path=File.join  output_dir, f.name
      FileUtils.mkdir_p  File.dirname(f_path)
      zip_file.extract(f, f_path) unless File.exist? f_path
    end
  end
end

# File lib/generators/favicon_generator.rb, line 101
def replace_url_by_asset_path(content)
  repl = "\"<%= asset_path 'favicon\\k<path>' %>\""
  content.gsub(/"#{PATH_UNIQUE_KEY}(?<path>[^"]+)"/) do |s|
    s.gsub!(/\\\//, '/')
    s.gsub(/"#{PATH_UNIQUE_KEY}(?<path>[^"]+)"/, repl)
  end
end