root/platform/tdiary/plugin/monthly_autopagerize.rb

#
# monthly_autopagerize.rb - tDiary plugin
#
# add <link rel="prev"> and <link rel="next"> tags for AutoPagerize at monthly mode
#
# Copyright (C) 2009 MATSUI Shinsuke <poppen@karashi.org>
# You can redistribute it and/or modify it under GPL2.
#

if @mode == 'month' then
        add_header_proc do
                stream = @conf['monthly_autopagerize.stream'] || 0
                result = String.new

                ym = []
                @years.keys.each do |y|
                        ym += @years[y].collect {|m| y + m}
                end
                ym.sort!
                now = @date.strftime( '%Y%m' )
                return '' unless ym.index( now )
                prev_month = ym.index( now ) == 0 ? nil : ym[ym.index( now )-1]
                next_month = ym[ym.index( now )+1]

                case stream
                #when 0
                #       rel_prev_month = 'next'
                #       rel_next_month = 'prev'
                when 1
                        rel_prev_month = 'prev'
                        rel_next_month = 'next'
                else
                        rel_prev_month = 'next'
                        rel_next_month = 'prev'
                end

                if prev_month then
                        result << %Q[<link rel="#{rel_prev_month}" title="#{h navi_prev_month}" href="#{h @index}#{anchor( prev_month )}">\n\t]
                end
                if next_month then
                        result << %Q[<link rel="#{rel_next_month}" title="#{h navi_next_month}" href="#{h @index}#{anchor( next_month )}">\n\t]
                end

                result.chop.chop
        end
end

add_conf_proc( 'monthly_autopagerize', 'Monthly AutoPagerize' ) do
        if @mode == 'saveconf' then
                @conf['monthly_autopagerize.stream'] = @cgi.params['monthly_autopagerize.stream'][0].to_i
        end
        <<-HTML
                <h3>Stream of Monthly AutoPagerize</h3>
                <p><select name="monthly_autopagerize.stream">
                        <option value="0"#{' selected' if @conf['monthly_autopagerize.stream'] == 0}>To Past</option>
                        <option value="1"#{' selected' if @conf['monthly_autopagerize.stream'] == 1}>To Future</option>
                </select></p>
        HTML
end

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