82 lines
2.5 KiB
Ruby
82 lines
2.5 KiB
Ruby
module Banzai
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module Renderer
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# Convert a Markdown String into an HTML-safe String of HTML
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#
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# Note that while the returned HTML will have been sanitized of dangerous
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# HTML, it may post a risk of information leakage if it's not also passed
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# through `post_process`.
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#
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# Also note that the returned String is always HTML, not XHTML. Views
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# requiring XHTML, such as Atom feeds, need to call `post_process` on the
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# result, providing the appropriate `pipeline` option.
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#
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# markdown - Markdown String
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# context - Hash of context options passed to our HTML Pipeline
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#
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# Returns an HTML-safe String
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def self.render(text, context = {})
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cache_key = context.delete(:cache_key)
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cache_key = full_cache_key(cache_key, context[:pipeline])
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if cache_key
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Rails.cache.fetch(cache_key) do
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cacheless_render(text, context)
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end
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else
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cacheless_render(text, context)
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end
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end
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def self.render_result(text, context = {})
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Pipeline[context[:pipeline]].call(text, context)
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end
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def self.pre_process(text, context)
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pipeline = Pipeline[:pre_process]
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pipeline.to_html(text, context)
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end
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# Perform post-processing on an HTML String
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#
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# This method is used to perform state-dependent changes to a String of
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# HTML, such as removing references that the current user doesn't have
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# permission to make (`RedactorFilter`).
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#
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# html - String to process
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# context - Hash of options to customize output
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# :pipeline - Symbol pipeline type
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# :project - Project
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# :user - User object
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#
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# Returns an HTML-safe String
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def self.post_process(html, context)
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context = Pipeline[context[:pipeline]].transform_context(context)
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pipeline = Pipeline[:post_process]
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if context[:xhtml]
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pipeline.to_document(html, context).to_html(save_with: Nokogiri::XML::Node::SaveOptions::AS_XHTML)
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else
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pipeline.to_html(html, context)
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end.html_safe
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end
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private
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def self.cacheless_render(text, context = {})
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result = render_result(text, context)
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output = result[:output]
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if output.respond_to?(:to_html)
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output.to_html
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else
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output.to_s
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end
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end
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def self.full_cache_key(cache_key, pipeline_name)
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return unless cache_key
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["banzai", *cache_key, pipeline_name || :full]
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end
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end
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end
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