# encoding: UTF-8

class WpPlugins < WpItems
  module Detectable

    # @return [ String ]
    def vulns_file
      PLUGINS_VULNS_FILE
    end

    # @return [ String ]
    def item_xpath
      '//plugin'
    end

    # @param [ WpTarget ] wp_target
    # @param [ Hash ] options
    #
    # @return [ WpPlugins ]
    def passive_detection(wp_target, options = {})
      detected = super(wp_target, options)

      detected += from_header(wp_target)
      detected += from_content(wp_target)

      detected.sort.uniq!
      detected
    end

    protected

    # X-Powered-By: W3 Total Cache/0.9.2.5
    # @param [ Typhoeus::Response ] response
    #
    # @return [ WpPlugins ]
    def from_header(wp_target)
      wp_plugins = WpPlugins.new
      response   = Browser.get(wp_target.url)

      if response.headers && powered_by = response.headers[:x_powered_by]
        if powered_by =~ /W3 Total Cache\/([^0-9.]+)/i
          wp_plugins << WpPlugin.new(
            wp_target.uri,
            self.item_options(wp_target).merge(name: 'w3-total-cache', version: $1)
          )
        end
      end
      wp_plugins
    end

    # <!-- Cached page generated by WP-Super-Cache on 2013-05-03 14:46:37 -->
    # <!-- Performance optimized by W3 Total Cache.
    # @param [ Typhoeus::Response ] response
    #
    # @return [ WpPlugins ]
    def from_content(wp_target)
      body       = Browser.get(wp_target.url).body
      wp_plugins = WpPlugins.new
      options    = self.item_options(wp_target)

      if body =~ /wp-super-cache/i
        wp_plugins << WpPlugin.new(wp_target.uri, options.merge(name: 'wp-super-cache'))
      end

      if body =~ /w3 total cache/i
        wp_plugins << WpPlugin.new(wp_target.uri, options.merge(name: 'w3-total-cache'))
      end

      wp_plugins.uniq!
      wp_plugins
    end

  end
end