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