pinafore/src/routes/_utils/statusHtmlToPlainText.js
2019-08-03 13:49:37 -07:00

48 lines
1.4 KiB
JavaScript

import { mark, stop } from './marks'
import { massageStatusPlainText } from './massageStatusPlainText'
const domParser = process.browser && new DOMParser()
// mentions like "@foo" have to be expanded to "@foo@example.com"
function massageMentions (doc, mentions) {
const anchors = doc.querySelectorAll('a.mention')
for (let i = 0; i < anchors.length; i++) {
const anchor = anchors[i]
const href = anchor.getAttribute('href')
const mention = mentions.find(mention => mention.url === href)
if (mention) {
anchor.innerText = `@${mention.acct}`
}
}
}
// paragraphs should be separated by double newlines
// single <br/>s should become single newlines
function innerTextRetainingNewlines (doc) {
let res = ''
const paragraphs = doc.querySelectorAll('p')
for (let i = 0; i < paragraphs.length; i++) {
const paragraph = paragraphs[i]
const brs = paragraph.querySelectorAll('br')
for (let j = 0; j < brs.length; j++) {
const br = brs[j]
br.parentNode.replaceChild(doc.createTextNode('\n'), br)
}
res += (i > 0 ? '\n\n' : '') + paragraph.textContent
}
return res
}
export function statusHtmlToPlainText (html, mentions) {
if (!html) {
return ''
}
mark('statusHtmlToPlainText')
html = massageStatusPlainText(html)
const doc = domParser.parseFromString(html, 'text/html')
massageMentions(doc, mentions)
const res = innerTextRetainingNewlines(doc)
stop('statusHtmlToPlainText')
return res
}