wikijs-fork/server/modules/rendering/html-core/renderer.js

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const _ = require('lodash')
const cheerio = require('cheerio')
const uslug = require('uslug')
const pageHelper = require('../../../helpers/page')
const URL = require('url').URL
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const mustacheRegExp = /(\{|{?){2}(.+?)(\}|}?){2}/i
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/* global WIKI */
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module.exports = {
async render() {
const $ = cheerio.load(this.input, {
decodeEntities: true
})
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if ($.root().children().length < 1) {
return ''
}
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// --------------------------------
// STEP: PRE
// --------------------------------
for (let child of _.reject(this.children, ['step', 'post'])) {
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const renderer = require(`../${_.kebabCase(child.key)}/renderer.js`)
await renderer.init($, child.config)
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}
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// --------------------------------
// Detect internal / external links
// --------------------------------
let internalRefs = []
const reservedPrefixes = /^\/[a-z]\//i
const exactReservedPaths = /^\/[a-z]$/i
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const isHostSet = WIKI.config.host.length > 7 && WIKI.config.host !== 'http://'
if (!isHostSet) {
WIKI.logger.warn('Host is not set. You must set the Site Host under General in the Administration Area!')
}
$('a').each((i, elm) => {
let href = $(elm).attr('href')
// -> Ignore empty / anchor links, e-mail addresses, and telephone numbers
if (!href || href.length < 1 || href.indexOf('#') === 0 ||
href.indexOf('mailto:') === 0 || href.indexOf('tel:') === 0) {
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return
}
// -> Strip host from local links
if (isHostSet && href.indexOf(WIKI.config.host) === 0) {
href = href.replace(WIKI.config.host, '')
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}
// -> Assign local / external tag
if (href.indexOf('://') < 0) {
// -> Remove trailing slash
if (_.endsWith('/')) {
href = href.slice(0, -1)
}
// -> Check for system prefix
if (reservedPrefixes.test(href) || exactReservedPaths.test(href)) {
$(elm).addClass(`is-system-link`)
} else if (href.indexOf('.') >= 0) {
$(elm).addClass(`is-asset-link`)
} else {
let pagePath = null
// -> Add locale prefix if using namespacing
if (WIKI.config.lang.namespacing) {
// -> Reformat paths
if (href.indexOf('/') !== 0) {
if (this.config.absoluteLinks) {
href = `/${this.page.localeCode}/${href}`
} else {
href = (this.page.path === 'home') ? `/${this.page.localeCode}/${href}` : `/${this.page.localeCode}/${this.page.path}/${href}`
}
} else if (href.charAt(3) !== '/') {
href = `/${this.page.localeCode}${href}`
}
try {
const parsedUrl = new URL(`http://x${href}`)
pagePath = pageHelper.parsePath(parsedUrl.pathname)
} catch (err) {
return
}
} else {
// -> Reformat paths
if (href.indexOf('/') !== 0) {
if (this.config.absoluteLinks) {
href = `/${href}`
} else {
href = (this.page.path === 'home') ? `/${href}` : `/${this.page.path}/${href}`
}
}
try {
const parsedUrl = new URL(`http://x${href}`)
pagePath = pageHelper.parsePath(parsedUrl.pathname)
} catch (err) {
return
}
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}
// -> Save internal references
internalRefs.push({
localeCode: pagePath.locale,
path: pagePath.path
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})
$(elm).addClass(`is-internal-link`)
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}
} else {
$(elm).addClass(`is-external-link`)
if (this.config.openExternalLinkNewTab) {
$(elm).attr('target', '_blank')
$(elm).attr('rel', this.config.relAttributeExternalLink)
}
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}
// -> Update element
$(elm).attr('href', href)
})
// --------------------------------
// Detect internal link states
// --------------------------------
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const pastLinks = await this.page.$relatedQuery('links')
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if (internalRefs.length > 0) {
// -> Find matching pages
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const results = await WIKI.models.pages.query().column('id', 'path', 'localeCode').where(builder => {
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internalRefs.forEach((ref, idx) => {
if (idx < 1) {
builder.where(ref)
} else {
builder.orWhere(ref)
}
})
})
// -> Apply tag to internal links for found pages
$('a.is-internal-link').each((i, elm) => {
const href = $(elm).attr('href')
let hrefObj = {}
try {
const parsedUrl = new URL(`http://x${href}`)
hrefObj = pageHelper.parsePath(parsedUrl.pathname)
} catch (err) {
return
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}
if (_.some(results, r => {
return r.localeCode === hrefObj.locale && r.path === hrefObj.path
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})) {
$(elm).addClass(`is-valid-page`)
} else {
$(elm).addClass(`is-invalid-page`)
}
})
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// -> Add missing links
const missingLinks = _.differenceWith(internalRefs, pastLinks, (nLink, pLink) => {
return nLink.localeCode === pLink.localeCode && nLink.path === pLink.path
})
if (missingLinks.length > 0) {
if (WIKI.config.db.type === 'postgres') {
await WIKI.models.pageLinks.query().insert(missingLinks.map(lnk => ({
pageId: this.page.id,
path: lnk.path,
localeCode: lnk.localeCode
})))
} else {
for (const lnk of missingLinks) {
await WIKI.models.pageLinks.query().insert({
pageId: this.page.id,
path: lnk.path,
localeCode: lnk.localeCode
})
}
}
}
}
// -> Remove outdated links
if (pastLinks) {
const outdatedLinks = _.differenceWith(pastLinks, internalRefs, (nLink, pLink) => {
return nLink.localeCode === pLink.localeCode && nLink.path === pLink.path
})
if (outdatedLinks.length > 0) {
await WIKI.models.pageLinks.query().delete().whereIn('id', _.map(outdatedLinks, 'id'))
}
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}
// --------------------------------
// Add header handles
// --------------------------------
let headers = []
$('h1,h2,h3,h4,h5,h6').each((i, elm) => {
let headerSlug = uslug($(elm).text())
// -> If custom ID is defined, try to use that instead
if ($(elm).attr('id')) {
headerSlug = $(elm).attr('id')
}
// -> Cannot start with a number (CSS selector limitation)
if (headerSlug.match(/^\d/)) {
headerSlug = `h-${headerSlug}`
}
// -> Make sure header is unique
if (headers.indexOf(headerSlug) >= 0) {
let isUnique = false
let hIdx = 1
while (!isUnique) {
const headerSlugTry = `${headerSlug}-${hIdx}`
if (headers.indexOf(headerSlugTry) < 0) {
isUnique = true
headerSlug = headerSlugTry
}
hIdx++
}
}
// -> Add anchor
$(elm).attr('id', headerSlug).addClass('toc-header')
$(elm).prepend(`<a class="toc-anchor" href="#${headerSlug}">&#xB6;</a> `)
headers.push(headerSlug)
})
// --------------------------------
// Wrap root text nodes
// --------------------------------
$('body').contents().toArray().forEach(item => {
if (item && item.type === 'text' && item.parent.name === 'body') {
$(item).wrap('<div></div>')
}
})
// --------------------------------
// Escape mustache expresions
// --------------------------------
function iterateMustacheNode (node) {
const list = $(node).contents().toArray()
list.forEach(item => {
if (item && item.type === 'text') {
const rawText = $(item).text().replace(/\r?\n|\r/g, '')
if (mustacheRegExp.test(rawText)) {
$(item).parent().attr('v-pre', true)
}
} else {
iterateMustacheNode(item)
}
})
}
iterateMustacheNode($.root())
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$('pre').each((idx, elm) => {
$(elm).attr('v-pre', true)
})
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// --------------------------------
// STEP: POST
// --------------------------------
let output = decodeEscape($.html('body').replace('<body>', '').replace('</body>', ''))
for (let child of _.sortBy(_.filter(this.children, ['step', 'post']), ['order'])) {
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const renderer = require(`../${_.kebabCase(child.key)}/renderer.js`)
output = await renderer.init(output, child.config)
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}
return output
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}
}
function decodeEscape (string) {
return string.replace(/&#x([0-9a-f]{1,6});/ig, (entity, code) => {
code = parseInt(code, 16)
// Don't unescape ASCII characters, assuming they're encoded for a good reason
if (code < 0x80) return entity
return String.fromCodePoint(code)
})
}