require 'html2rss/config'
require 'html2rss/feed_builder'
require 'html2rss/version'
require 'yaml'

module Html2rss
  def self.feed_from_yaml_config(file, name)
    # rubocop:disable Security/YAMLLoad
    yaml = YAML.load(File.open(file))
    # rubocop:enable Security/YAMLLoad

    feed_config = yaml['feeds'][name]
    global_config = yaml.reject { |k| k == 'feeds' }

    config = Config.new(feed_config, global_config)
    feed(config)
  end

  ##
  # Returns the RSS object, which is generated from the provided config.
  #
  # `config`: can be a Hash or an instance of Html2rss::Config.
  #
  # = Example with a Ruby Hash
  #    Html2rss.feed(
  #      channel: { name: 'StackOverflow: Hot Network Questions', url: 'https://stackoverflow.com' },
  #      selectors: {
  #        items: { selector: '#hot-network-questions > ul > li' },
  #        title: { selector: 'a' },
  #        link: { selector: 'a', extractor: 'href' }
  #      }
  #    )
  def self.feed(config)
    config = Config.new(config) unless config.is_a?(Config)

    feed = FeedBuilder.new config
    feed.rss
  end
end