Init commit, spaghetti code but does most of the job

run.js

@@ -0,0 +1,225 @@
+const fs = require('fs')
+
+const CURRENT_DATE = new Date()
+
+// TODO
+//
+// When running we want to fill all dates that are:
+// 1. next date
+// 2. any previous date
+// 3. no date that already exists
+//
+// solved with iterating until the current date found
+
+// TODO Handle rollover of date list
+//
+// New years to start: 30.12 04.01 30.01
+// End to new years: 21.12 31.12 03.01 14.01
+//
+// Create function that takes a list of dates and creates
+// real date objects. It should include logic for look-ahead
+// to adress rollover.
+
+function writeStringToFile(filePath, content) {
+    fs.writeFile(filePath, content, (err) => {
+        if (err) {
+            console.error(`Error writing to ${filePath}:`, err);
+        } else {
+            console.log(`Successfully wrote to ${filePath}`);
+        }
+    });
+}
+
+function uuidv4() {
+  return "10000000-1000-4000-8000-100000000000".replace(/[018]/g, c =>
+    (+c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> +c / 4).toString(16)
+  );
+}
+
+async function getSite(url) {
+  return fetch(url).then(async (resp) => {
+    if (!resp.ok) {
+      console.log("unable to fetch site");
+      console.log(err);
+      console.log(resp.status);
+      console.log(resp.statusText);
+      throw err;
+    }
+
+    return await resp.text();
+  });
+}
+
+function getFullLocationName(text, key) {
+  regexpLocation = new RegExp(`(${key}[\\w\\d\\søæå]*),`, "i");
+  location = text.match(regexpLocation);
+
+  // TODO null handle
+  
+  return location[1]
+}
+
+function getTimeForLocation(text, location) {
+  regexpTime = new RegExp(`${location}, (kl (\\d+:\\d+) – (\\d+:\\d+))`, "i");
+  times = text.match(regexpTime);
+  console.log(times[2], times[3])
+
+  // TODO null handle
+
+  from = times[2];
+  to = times[3];
+  return [from, to];
+}
+
+function getDatesForLocation(text, location) {
+  regexpDatesString = new RegExp(`${location}.*<br>((\\d+.\\d+).*)</p>`, "i");
+  datesString = text.match(regexpDatesString)[0];
+  console.log(text.match(regexpDatesString))
+
+  // only care about first paragraph
+  console.log("datestring", datesString)
+  datesString = datesString.split('</p>')[0]
+
+  // TODO null check
+
+  console.log("datestring", datesString)
+
+  regexpDates = /(\d+\.\d+)+/g
+  dates = datesString.match(regexpDates)
+
+  // TODO null check
+
+  return dates
+}
+
+function getSolberg(site, TITLE) {
+  const name = getFullLocationName(site, TITLE)
+  const [from, to] = getTimeForLocation(site, name);
+  const dates = getDatesForLocation(site, TITLE);
+
+  return { name, times: { from, to }, dates };
+}
+
+function formatRSSDate(date) {
+  const days = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
+  const months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
+
+  const day = days[date.getUTCDay()];
+  const dayOfMonth = date.getUTCDate();
+  const month = months[date.getUTCMonth()];
+  const year = date.getUTCFullYear();
+  const hours = String(date.getUTCHours()).padStart(2, '0');
+  const minutes = String(date.getUTCMinutes()).padStart(2, '0');
+  const seconds = String(date.getUTCSeconds()).padStart(2, '0');
+
+  return `${day}, ${dayOfMonth} ${month} ${year} ${hours}:${minutes}:${seconds} +0000`;
+}
+
+function generateRSS(name, times, dates, URL) {
+  const description = "Viser hentetider for miljøbilen fra folloren.no"
+  const updatedDate = formatRSSDate(new Date())
+
+  const blocks = dates.reverse().map((date, n) => {
+    const relativeDate = new Date().getTime() - (n * 100000000)
+    const time = formatRSSDate(new Date(relativeDate))
+
+    return `
+ <item>
+  <title></title>
+  <description>Vi minner om miljøbilen fra FolloRen besøker oss på ${name} kl ${times.from}-${times.to} den ${date}.</description>
+  <link>${URL}</link>
+  <guid isPermaLink="false">${uuidv4()}</guid>
+  <pubDate>${time}</pubDate>
+ </item>
+    `
+  })
+
+  return `
+<?xml version="1.0" encoding="UTF-8" ?>
+<rss version="2.0">
+<channel>
+ <title>Miljøbilen hentetider ${name}</title>
+ <description>${description}</description>
+ <link>https://github.com/kevinmidboe/miljobilen-rss</link>
+ <copyright>2020 Example.com All rights reserved</copyright>
+ <lastBuildDate>${updatedDate}</lastBuildDate>
+ <pubDate>${updatedDate}</pubDate>
+ <ttl>1800</ttl>
+
+  ${blocks.join('')}
+
+</channel>
+</rss>
+  `
+}
+
+function websiteDateToTime(dateString) {
+  const date = new Date()
+  let [_, day, month] = dateString.match(/(\d+).(\d+)/)
+  day = Number(day)
+  month = Number(month)
+
+  date.setMonth(Number(month - 1))
+  date.setDate(Number(day))
+  // console.log({day, month})
+  // console.log('prev:', date <= CURRENT_DATE)
+  // console.log('futr:', date > CURRENT_DATE)
+
+  return date
+}
+
+function timeToWebsiteDate(date) {
+  const day = date.getDate()
+  const month = date.getMonth() + 1
+
+  const pad = (n) => String(n).padStart(2, '0')
+
+  return `${pad(day)}.${pad(month)}`
+}
+
+function relevantDates(allDates) {
+  const relevantDates = []
+  let index = 0;
+  let date = 0
+
+  while (date <= CURRENT_DATE) {
+    date = websiteDateToTime(allDates[index])
+
+    relevantDates.push(timeToWebsiteDate(date))
+    index = index + 1;
+  }
+
+  return relevantDates
+}
+
+async function main() {
+  const URL = "https://folloren.no/levering-av-avfall/miljobilen"
+  site = await getSite(URL);
+
+  console.log("got site:", site?.length || -1);
+  const PLACE = 'Langhus'
+  location = getSolberg(site, PLACE)
+
+  console.log(location)
+
+  let { name, times, dates } = location;
+  // dates[0] = '30.12'
+  dates.push('11.05')
+  dates.push('12.05')
+  dates.push('13.05')
+  console.log("all dates:", dates)
+
+  // todo relevant dates elsewhere
+  dates = relevantDates(dates)
+  console.log("rel dates:", dates)
+  rss = generateRSS(name, times, dates, URL)
+  writeStringToFile('rss.xml', rss)
+}
+
+try {
+  main();
+} catch (err) {
+  console.log("something went wront when runnning script");
+  console.log(err);
+}
+