Article

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