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https://github.com/public-transport/db-vendo-client.git
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26 lines
702 B
JavaScript
26 lines
702 B
JavaScript
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'use strict'
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// For any type of "thing to parse", there's >=1 parse functions.
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// By composing custom parse function(s) with the default ones, one
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// can customize the behaviour of hafas-client. Profiles extensively
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// use this mechanism.
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// Each parse function has the following signature:
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// ({opt, profile, common, res}, ...raw) => newParsed
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// Compose a new/custom parse function with the old/existing parse
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// function, so that the new fn will be called with the output of the
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// old fn.
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const parseHook = (oldParse, newParse) => {
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return (ctx, ...args) => {
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return newParse({
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...ctx,
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parsed: oldParse({...ctx, parsed: {}}, ...args)
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}, ...args)
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}
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}
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module.exports = {
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parseHook
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}
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