add fallback parser when LD/JSON not found, use DOM parser

lib/services/dom-parser.js

@@ -0,0 +1,77 @@
+const cheerio = require('cheerio')
+const dayjs = require('dayjs')
+const { parseDates } = require('../parser-utils')
+
+const parseDate = (timeText) => {
+  const parts = timeText.split('at')
+  const datePart = parts[0] || null
+  const timePart = parts[1] || null
+
+  if (!datePart) {
+    return {
+      start: null,
+      duration: null,
+    }
+  }
+
+  const normalizedTimeString = `${datePart}${timePart || ''}`
+  const startTime = dayjs(normalizedTimeString)
+
+  const { start, duration } = parseDates(startTime, null)
+
+  return {
+    start,
+    duration,
+  }
+}
+
+const createLocationData = (streetText, areaText) => {
+  const location = ([ streetText, areaText ])
+    .filter(i => i)
+    .join(', ') || ''
+
+  return location.replace(/\r?\n|\r/g, ' ')
+}
+
+// NOTE: Fallback parser
+// Attempt reading event data directly from DOM
+const parseUsingDOM = (html, url) => {
+  console.info('Fallback parser used')
+  const $ = cheerio.load(html)
+  const title = $('title').text()
+
+  const $eventSummary = $('#event_summary')
+  const $eventNode = $eventSummary ? $eventSummary.children()[1] : null
+
+  const $timeNode = $eventNode ? $eventNode.childNodes[0] : null
+  const $locationNode = $eventNode ? $eventNode.childNodes[1] : null
+
+  const timeText = $timeNode ? $timeNode.attribs.title : ''
+
+  const $locationBlock = $locationNode ? $($locationNode).find('td') : null
+  const $locationBlockTDs = $locationBlock ? $locationBlock.children() : []
+  const $streetBlock = $locationBlockTDs[1] || null
+  const $areaBlock = $locationBlockTDs[2] || null
+
+  const streetText = $streetBlock ? $($streetBlock).text() : ''
+  const areaText = $areaBlock ? $($areaBlock).text() : ''
+
+  const location = createLocationData(streetText, areaText)
+  const { start, duration } = parseDate(timeText)
+
+  const eventData = {
+    location,
+    start,
+    duration,
+    title,
+    url,
+  }
+
+  if (!eventData.title || !eventData.start) {
+    return null
+  }
+
+  return eventData
+}
+
+module.exports = parseUsingDOM