jekyll-seo-tag/lib/jekyll-seo-tag.rb

76 lines
1.8 KiB
Ruby

require "jekyll-seo-tag/version"
module Jekyll
class SeoTag < Liquid::Tag
attr_accessor :context
# Matches all whitespace that follows either
# 1. A '}', which closes a Liquid tag
# 2. A '{', which opens a JSON block
# 3. A '>' followed by a newline, which closes an XML tag or
# 4. A ',' followed by a newline, which ends a JSON line
# We will strip all of this whitespace to minify the template
# We will not strip any whitespace if the next character is a '-'
# so that we do not interfere with the HTML comment at the
# very begining
MINIFY_REGEX = %r!(?<=[{}]|[>,]\n)\s+(?\!-)!
def initialize(_tag_name, text, _tokens)
super
@text = text
end
def render(context)
@context = context
template.render!(payload, info)
end
private
def options
{
"version" => Jekyll::SeoTag::VERSION,
"title" => title?,
}
end
def payload
{
"page" => context.registers[:page],
"site" => context.registers[:site].site_payload["site"],
"paginator" => context["paginator"],
"seo_tag" => options,
}
end
def title?
@text !~ %r!title=false!i
end
def info
{
:registers => context.registers,
:filters => [Jekyll::Filters],
}
end
def template
@template ||= Liquid::Template.parse template_contents
end
def template_contents
@template_contents ||= begin
File.read(template_path).gsub(MINIFY_REGEX, "")
end
end
def template_path
@template_path ||= begin
File.expand_path "./template.html", File.dirname(__FILE__)
end
end
end
end
Liquid::Template.register_tag("seo", Jekyll::SeoTag)