50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
const { getPathWithoutLanguage, getPathWithoutVersion } = require('../lib/path-utils')
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const getLinkData = require('../lib/get-link-data')
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module.exports = async (req, res, next) => {
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const noTrack = () => {
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req.context.currentLearningTrack = {}
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return next()
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}
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if (!req.context.page) return next()
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const trackName = req.query.learn
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if (!trackName) return noTrack()
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const track = req.context.site.data['learning-tracks'][req.context.currentProduct][trackName]
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if (!track) return noTrack()
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const currentLearningTrack = { trackName }
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const guidePath = getPathWithoutLanguage(getPathWithoutVersion(req.path))
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const guideIndex = track.guides.findIndex((path) => path === guidePath)
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if (guideIndex < 0) return noTrack()
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if (guideIndex > 0) {
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const prevGuidePath = track.guides[guideIndex - 1]
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const result = await getLinkData(prevGuidePath, req.context, { title: true, intro: false })
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if (!result) return noTrack()
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const href = result.href
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const title = result.title
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currentLearningTrack.prevGuide = { href, title }
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}
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if (guideIndex < track.guides.length - 1) {
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const nextGuidePath = track.guides[guideIndex + 1]
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const result = await getLinkData(nextGuidePath, req.context, { title: true, intro: false })
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if (!result) return noTrack()
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const href = result.href
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const title = result.title
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currentLearningTrack.nextGuide = { href, title }
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}
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req.context.currentLearningTrack = currentLearningTrack
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return next()
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}
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