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# ogp.rb - add Open Graph Protocol <meta> tags to header
#
# Copyright (c) 2011 MATSUOKA Kohei <kmachu@gmail.com>
# You can redistribute it and/or modify it under GPL2.
#
# @conf['ogp.facebook.app_id'] - your facebook application ID.
# @conf['ogp.facebook.admins'] - your facebook ID.
def ogp_description(html)
@conf.shorten(remove_tag(html), 200)
end
def ogp_image(html)
images = html.scan(/<img.*?src="(.*?)"/)
if !images.empty?
images.first[0]
else
@conf.banner
end
end
if defined? :ogp_tag && !defined? :ogp_tag_org
alias :ogp_tag_org :ogp_tag
end
def ogp_tag
ogp = ogp_tag_org || ''
headers = {
'fb:app_id' => @conf['ogp.facebook.app_id'],
'fb:admins' => @conf['ogp.facebook.admins']
}
if @mode == 'day'
# remove original og:image generated at 00default.rb
ogp.gsub!(/<meta property="og:image"[^>]+>\n/, '')
diary = @diaries[@date.strftime('%Y%m%d')]
if diary
sections = diary.instance_variable_get(:@sections)
section_index = @cgi.params['p'][0] || sections.size
begin
section = sections[section_index.to_i - 1].body_to_html
@image_date = @date.strftime("%Y%m%d") # hack for image plugin
section_html = apply_plugin(section)
headers['og:description'] = ogp_description(section_html)
headers['og:image'] = ogp_image(section_html)
rescue
end
end
end
ogp + "\n" + headers.select {|key, val|
val && !val.empty?
}.map {|key, val|
%Q|<meta property="#{key}" content="#{CGI::escapeHTML(val)}">|
}.join("\n")
end
add_conf_proc('Open Graph Protocol', 'Open Graph Protocol') do
if @mode == 'saveconf'
@conf['ogp.facebook.app_id'] = @cgi.params['ogp.facebook.app_id'][0]
@conf['ogp.facebook.admins'] = @cgi.params['ogp.facebook.admins'][0]
end
<<-HTML
<h3>Facebook Application ID</h3>
<p><input name="ogp.facebook.app_id" value="#{h(@conf['ogp.facebook.app_id'])}"></p>
<h3>Facebook User ID</h3>
<p><input name="ogp.facebook.admins" value="#{h(@conf['ogp.facebook.admins'])}"></p>
HTML
end
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