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Pass context along to every part of the pipeline #403

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merged 6 commits into from
Apr 30, 2024

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gjtorikian
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@gjtorikian gjtorikian commented Apr 26, 2024

This PR allows for more correct abstractions around contexts for the pipeline. Context for each filter can now be passed when the filter is instantiated, or, when the pipeline is called. This allows for the same filters and pipelines to execute in different ways, depending on the context at runtime.

Closes #402

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@nekketsuuu nekketsuuu left a comment

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Thanks for this patch! This works out for my use case.

end
end

unless @node_filters.empty?
instrument("call_node_filters.html_pipeline", payload) do
@node_filters.each { |filter| filter.context = (filter.context || {}).merge(context) }

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IMHO: This line might not align with the text_filters and convert_filter, as they pass the new context directly without merging. However this can be a non-problem since it's up to each text_filter and convert_filter to decide whether to overwrite the default context with the passed context or to merge the passed one to the default one.

@@ -25,6 +25,6 @@ def call(input, context: {}, result: {})
# bolds any instance of the word yeH
class YehBolderFilter < HTMLPipeline::TextFilter
def call(input, context: {}, result: {})
input.gsub("yeH", "**yeH**")
input.gsub("yeH", "**yeH**") unless context[:no_bolding] == false

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nits

  • I think it's more natural if yeH is converted only if context[:no_bolding] is false.
  • unless XXX == false is difficult to read.
  • We can safely remove == true or == false, and nil should be treated as falsy.
Suggested change
input.gsub("yeH", "**yeH**") unless context[:no_bolding] == false
input.gsub("yeH", "**yeH**") unless context[:no_bolding]

Test cases are also affected.

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Oh you’re quite right. I was hurriedly putting together a test here!

@gjtorikian gjtorikian changed the title Pass context along fully Pass context along to every part of the pipeline Apr 30, 2024
@gjtorikian gjtorikian merged commit d4a5269 into main Apr 30, 2024
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@gjtorikian gjtorikian deleted the pass-context-along-fully branch April 30, 2024 19:35
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Context & result of filters except for text_filters aren't overwritten on call time
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