require "cgi"
class Article
	#参照メソッド
	attr_reader :id, :title, :name, :comment, :ip
	$; = $, = "\t"
	@@id = []
	def initialize( line )
		id, title, name, comment, date, ip = line.chomp.split()
		@id = id.to_i
		raise ArticleError, "読み込み時に記事IDの不正がありました。" if @@id.include?( @id )
		@@id.push( @id )
		@title = title.to_s
		@name = name.to_s
		@comment = comment.to_s
		@date = date.to_i
		@ip = ip.to_s
	end
	def Article.post( title, name, comment, ip )
		#記事IDの取得
		id = @@id.first.to_i + 1
		#タイトルをチェック
		title = title.to_s
		title.gsub!( $;, " " )
		title.gsub!( /[\r\n]/, "" )
		title = CGI.escapeHTML( title.strip )
		title = "無題" if title == ""
		#名前をチェック
		name = name.to_s
		name.gsub!( $;, " " )
		name.gsub!( /[\r\n]/, "" )
		name = CGI.escapeHTML( name.chomp.strip )
		name = "名無し" if name == ""
		#コメントをチェック
		comment = comment.to_s
		comment.gsub!( $;, " " )
		comment.gsub!( /[\r\n]+$/, "" )
		comment = CGI.escapeHTML( comment.strip )
		comment.gsub!( /\r\n/, "<br />" )
		comment.gsub!( /[\r\n]/, "<br />" )
		raise ArticleError, "コメントがありません。" if comment == ""
		#日時の取得
		date = Time.now.to_i
		#記事インスタンスの作成
		Article.new( [ id.to_s, title, name, comment, date.to_s, ip ].join() )
	end
	def to_s
		[ @id, @title, @name, @comment, @date, @ip ].join()
	end
	def date
		Time.at( @date ).strftime("%y/%m/%d(%a) %H:%M:%S")
	end
end
class ArticleError < StandardError
end