require 'banzai' module Banzai # Extract possible GFM references from an arbitrary String for further processing. class ReferenceExtractor class << self LAZY_KEY = :banzai_reference_extractor_lazy def lazy? Thread.current[LAZY_KEY] end def lazily(values = nil, &block) return (values || block.call).uniq if lazy? begin Thread.current[LAZY_KEY] = true values ||= block.call Banzai::LazyReference.load(values.uniq).uniq ensure Thread.current[LAZY_KEY] = false end end end def initialize @texts = [] end def analyze(text, context = {}) @texts << Renderer.render(text, context) end def references(type, context = {}) filter = Banzai::Filter["#{type}_reference"] context.merge!( pipeline: :reference_extraction, # ReferenceGathererFilter reference_filter: filter ) self.class.lazily do @texts.flat_map do |html| text_context = context.dup result = Renderer.render_result(html, text_context) result[:references][type] end.uniq end end end end