43 lines
977 B
Ruby
43 lines
977 B
Ruby
# frozen_string_literal: true
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require 'uri'
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module Banzai
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module Filter
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# HTML filter that "fixes" links to pages/files in a wiki.
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# Rewrite rules are documented in the `WikiPipeline` spec.
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#
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# Context options:
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# :project_wiki
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class WikiLinkFilter < HTML::Pipeline::Filter
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def call
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return doc unless project_wiki?
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doc.search('a:not(.gfm)').each do |el|
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process_link_attr el.attribute('href')
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end
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doc
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end
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protected
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def project_wiki?
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!context[:project_wiki].nil?
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end
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def process_link_attr(html_attr)
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return if html_attr.blank?
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html_attr.value = apply_rewrite_rules(html_attr.value)
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rescue URI::Error, Addressable::URI::InvalidURIError
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# noop
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end
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def apply_rewrite_rules(link_string)
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Rewriter.new(link_string, wiki: context[:project_wiki], slug: context[:page_slug]).apply_rules
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end
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end
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end
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end
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