mirror of
https://github.com/comatory/fb2iCal
synced 2025-06-05 22:09:25 +02:00
ae700330b9
When user enters something invalid (like number 123), it wuold still hit FB webpage and return HTML. I do simple detection by looking at title when it attempts to parse the DOM directly. When it contains "Content Not Found", it is skipped. Non-existent web pages cannot be parsed by using LDJSON parser and looking at null data.
92 lines
2.5 KiB
JavaScript
92 lines
2.5 KiB
JavaScript
const cheerio = require('cheerio')
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const dayjs = require('dayjs')
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const { parseDates } = require('../parser-utils')
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const TITLE_BLACKLIST = [
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'Content Not Found',
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]
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const parseDate = (timeText = '') => {
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const parts = timeText.split('at')
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const datePart = parts[0] || null
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const timePart = parts[1] || null
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const rangeTimeParts = timePart ? timePart.split('–') : []
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const startTimePart = `${datePart || ''}${rangeTimeParts[0] || ''}`
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const endTimePart = `${datePart || ''}${rangeTimeParts[1] || ''}`
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const startTime = startTimePart ?
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dayjs(startTimePart) :
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dayjs(new Date())
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const endTime = dayjs(endTimePart)
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const normalizedStartTime = startTime.isValid() ? startTime : dayjs(new Date())
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const normalizedEndTime = endTime.isValid() ? endTime : dayjs(new Date())
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const { start, duration } = parseDates(normalizedStartTime, normalizedEndTime)
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const minimumDuration = { ...duration, minutes: duration.minutes || 120 }
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return {
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start,
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duration: minimumDuration,
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}
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}
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const createLocationData = (streetText, areaText) => {
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const location = ([ streetText, areaText ])
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.filter(i => i)
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.join(', ') || ''
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return location.replace(/\r?\n|\r/g, ' ')
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}
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// NOTE: Fallback parser
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// Attempt reading event data directly from DOM
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const parseUsingDOM = (html, { logger }) => {
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if (logger) {
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logger.log({
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message: 'Using fallback DOM parser',
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level: 'info',
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service: 'parser',
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})
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}
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const $ = cheerio.load(html)
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const titleText = $('title').text()
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const title = TITLE_BLACKLIST.includes(titleText) ? null : titleText
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const $eventSummary = $('#event_summary')
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const $eventNode = $eventSummary ? $eventSummary.children()[1] : null
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const $timeNode = $eventNode ? $eventNode.childNodes[0] : null
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const $locationNode = $eventNode ? $eventNode.childNodes[1] : null
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const timeText = $timeNode ? $timeNode.attribs.title : ''
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const $locationBlock = $locationNode ? $($locationNode).find('td') : null
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const $locationBlockTDs = $locationBlock ? $locationBlock.children() : []
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const $streetBlock = $locationBlockTDs[1] || null
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const $areaBlock = $locationBlockTDs[2] || null
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const streetText = $streetBlock ? $($streetBlock).text() : ''
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const areaText = $areaBlock ? $($areaBlock).text() : ''
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const location = createLocationData(streetText, areaText)
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const { start, duration } = parseDate(timeText)
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const eventData = {
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location,
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start,
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duration,
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title,
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}
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if (!eventData.title || !eventData.start) {
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return null
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}
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return eventData
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}
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module.exports = parseUsingDOM
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