| 1 | import fetch from 'node-fetch'
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| 2 | import { marked } from 'marked'
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| 3 |
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| 4 | const regExp = /^(-{3}(?:\n|\r)([\w\W]+?)(?:\n|\r)-{3})?([\w\W]*)*/
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| 5 |
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| 6 | function convertMarkdownResponse (response) {
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| 7 | const contentType = response.headers.get('Content-Type')
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| 8 | if (contentType.includes('text')) return response.text()
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| 9 | }
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| 10 |
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| 11 | function getMarkdownFrontMatter (metas) {
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| 12 | return metas.split('\n').reduce((acc, meta) => {
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| 13 | const [key, value] = meta.trim().split(': ', 2)
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| 14 | const schema = { [key]: value.slice(1, -1) }
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| 15 | return { ...acc, ...schema }
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| 16 | }, {})
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| 17 | }
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| 18 |
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| 19 | function formatMarkdownResponseToHtml (data) {
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| 20 | if (!data) return null
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| 21 |
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| 22 | const { 2: metas, 3: body } = regExp.exec(data)
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| 23 | const content = body ? marked(body) : null
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| 24 | const head = metas ? getMarkdownFrontMatter(metas) : null
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| 25 |
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| 26 | return { head, content }
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| 27 | }
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| 28 |
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| 29 | export default function markdownService (url) {
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| 30 | if (!url) return null
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| 31 |
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| 32 | return fetch(url)
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| 33 | .then(convertMarkdownResponse)
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| 34 | .then(formatMarkdownResponseToHtml)
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| 35 | .catch(() => null)
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| 36 | }
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