diff options
Diffstat (limited to 'lib/banzai/filter/wiki_link_filter/rewriter.rb')
-rw-r--r-- | lib/banzai/filter/wiki_link_filter/rewriter.rb | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/lib/banzai/filter/wiki_link_filter/rewriter.rb b/lib/banzai/filter/wiki_link_filter/rewriter.rb new file mode 100644 index 00000000000..2e2c8da311e --- /dev/null +++ b/lib/banzai/filter/wiki_link_filter/rewriter.rb @@ -0,0 +1,40 @@ +module Banzai + module Filter + class WikiLinkFilter < HTML::Pipeline::Filter + class Rewriter + def initialize(link_string, wiki:, slug:) + @uri = Addressable::URI.parse(link_string) + @wiki_base_path = wiki && wiki.wiki_base_path + @slug = slug + end + + def apply_rules + apply_file_link_rules! + apply_hierarchical_link_rules! + apply_relative_link_rules! + @uri.to_s + end + + private + + # Of the form 'file.md' + def apply_file_link_rules! + @uri = Addressable::URI.join(@slug, @uri) if @uri.extname.present? + end + + # Of the form `./link`, `../link`, or similar + def apply_hierarchical_link_rules! + @uri = Addressable::URI.join(@slug, @uri) if @uri.to_s[0] == '.' + end + + # Any link _not_ of the form `http://example.com/` + def apply_relative_link_rules! + if @uri.relative? && @uri.path.present? + link = ::File.join(@wiki_base_path, @uri.path) + @uri = Addressable::URI.parse(link) + end + end + end + end + end +end |