# 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.uniq! { |i| i.name }
      detected
    end

    protected

    # X-Powered-By: W3 Total Cache/0.9.2.5
    # WP-Super-Cache: Served supercache file from PHP
    # @param [ WpTarget ] wp_target
    #
    # @return [ WpPlugins ]
    def from_header(wp_target)
      headers    = Browser.get(wp_target.url).headers
      wp_plugins = WpPlugins.new

      if headers
        powered_by     = headers[:x_powered_by]
        wp_super_cache = headers['wp-super-cache']

        if powered_by =~ /W3 Total Cache/i
          wp_plugins << create_item(WpPlugin, 'w3-total-cache', wp_target)
        end

        if wp_super_cache =~ /supercache/i
          wp_plugins << create_item(WpPlugin, 'wp-super-cache', wp_target)
        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 [ WpTarget ] wp_target
    #
    # @return [ WpPlugins ]
    def from_content(wp_target)
      body       = Browser.get(wp_target.url).body
      wp_plugins = WpPlugins.new

      if body =~ /wp-super-cache/i
        wp_plugins << create_item(WpPlugin, 'wp-super-cache', wp_target)
      end

      if body =~ /w3 total cache/i
        wp_plugins << create_item(WpPlugin, 'w3-total-cache', wp_target)
      end

      wp_plugins
    end

  end
end