checkers_available/external_list_checker.rb
register_checker("External_List_Checker")

class External_List_Checker < Checker
	@file_name = nil

	def initialize
		super
		@description = "Check an external file for matches"

		@external_list = {}
		@cli_params = [['--ext.file', GetoptLong::REQUIRED_ARGUMENT]]
	end

	def usage
		return "\t--ext.file <filename>: external file"
	end

	def parse_params opts
		opts.each do |opt, arg|
			case opt
				when '--ext.file'
					@file_name = arg
					load_file
			end
		end

		if @file_name.nil?
			puts "External File Checker - No file specified, use --ext.file to specify the file to use. Aborting"
			exit 1
#			raise Exception.new(true), "External File Checker - No file specified"
		end
	end

	def load_file
		if !@file_name.nil?
			if File.exist?(@file_name)
				begin
					File.open(@file_name, 'r').each_line do |word|
						@external_list[word.force_encoding("ASCII-8BIT").strip] = 0 unless word.force_encoding("ASCII-8BIT").strip == ''
					end
				rescue Errno::EACCES => e
					raise PipalException.new("Unable to open external file")
				end
			else
				raise PipalException.new("Unable to open external file")
			end
		end
	end

	def process_word (word, extras = nil)
		@external_list.each_pair do |domain, count|
			if /#{Regexp.quote(domain)}/i.match word
				@external_list[domain] += 1
			end
		end

		@total_words_processed += 1
	end

	def get_results()
		if @external_list.length > 0
			count_ordered = []
			@external_list.each_pair do |domain, count|
				count_ordered << [domain, count] unless count == 0
			end
			@external_list = count_ordered.sort do |x,y|
				(x[1] <=> y[1]) * -1
			end

			ret_str = "External list (Top #{@cap_at.to_s})\n"
			disp = false
			@external_list[0, @cap_at].each do |data|
				disp = true
				ret_str << "#{data[0]} = #{data[1].to_s} (#{((data[1].to_f/@total_words_processed) * 100).round(2).to_s}%)\n"
			end
			unless disp
				ret_str << "None found\n"
			end
		end

		return ret_str
	end
end
