added: replace option to ms-ics-fix

src/ms-ics-fix/Dockerfile

@@ -8,7 +8,7 @@ COPY index.js .
 COPY package.json .
 COPY pnpm-lock.yaml .
 
-RUN pnpm i
+RUN pnpm i --prod
 
 EXPOSE 3000
 CMD ["node", "index.js"]

src/ms-ics-fix/README.md

@@ -15,20 +15,17 @@ BEGIN:VCALENDAR
 VERSION:2.0
 PRODID:-//Microsoft Corporation//Outlook 16.0 MIMEDIR//EN
 METHOD:PUBLISH
-# Definition of multiple VTIMEZONE components in one file can lead to conflicts
 BEGIN:VTIMEZONE
-TZID:Romance Standard Time # Non-standard and ambiguous TZID
-# ...
+TZID:Romance Standard Time
 END:VTIMEZONE
-# Another timezone definition which can confuse interpretation
 BEGIN:VTIMEZONE
 TZID:UTC
 # ...
 END:VTIMEZONE
 BEGIN:VEVENT
 # Event uses a different timezone, not properly linked to any defined VTIMEZONE
-DTSTART;TZID=Romance Standard Time:20240425T113000  # Uses TZID without proper global reference,
-DTEND;TZID=Romance Standard Time:20240425T120000  # likely to fail in non-Microsoft apps
+DTSTART;TZID=Central Europe Standard Time:20240425T113000 # Uses TZID without proper global reference,
+DTEND;TZID=Central Europe Standard Time:20240425T120000 # likely to fail in non-Microsoft apps
 # ...
 END:VEVENT
 END:VCALENDAR
@@ -43,7 +40,7 @@ And this is not a one time issue, see:
 - [answers.microsoft.com/[...]/published-calendar-events-show-incorrect-time-when](https://answers.microsoft.com/en-us/outlook_com/forum/all/published-calendar-events-show-incorrect-time-when/c8e60444-1d02-45e1-a356-486f5a9370fc)
 - [answers.microsoft.com/[...]/incorrect-timezone-when-subscribed-to-calendar](https://answers.microsoft.com/en-us/outlook_com/forum/all/incorrect-timezone-when-subscribed-to-calendar/c20444c1-df78-471d-9524-702f448c7c63)
 
-To fix this, this tool will work like an ICS proxy, which will fix the timezone issue.
+To fix this, this tool will work like an ICS proxy, which will re- parse the ICS file.
 
 ## Environment Variables
 
@@ -52,6 +49,8 @@ To fix this, this tool will work like an ICS proxy, which will fix the timezone
 | `ICS_ON_DEMAND` | boolean | `false` | Whether to enable the on demand mode. |
 | `ICS_{counter}_URL` | string | `null` | The URL of the ICS file to serve. |
 | `ICS_{counter}_PATH` | string? | `null` | The path to serve the ICS file. |
+| `REPLACE_{counter}_FROM` | string | `null` | The string to replace in the ICS file. |
+| `REPLACE_{counter}_TO` | string | `null` | The string to replace the string from with. |
 
 ## On Demand Mode
 
@@ -79,6 +78,9 @@ services:
  ICS_0_PATH: "your-new-filename-which-will-be-served.ics"
  ICS_1_URL: "https://example.com/calendar2.ics"
  # ...
+ REPLACE_0_FROM: "Romance Standard Time"
+ REPLACE_0_TO: "Europe/Paris"
+ # ...
 ```
 
 This will result in to paths being published:

src/ms-ics-fix/index.js

@@ -6,7 +6,8 @@ const port = 3000
 // Base config object
 const config = {
  onDemand: process.env.ICS_ON_DEMAND === 'true',
- ics: []
+ ics: [],
+ replace: [],
 }
 
 // Parse ICS configurations from environment variables
@@ -19,6 +20,15 @@ while (process.env[`ICS_${counter}_URL`]) {
  counter++
 }
 
+counter = 0
+while (process.env[`REPLACE_${counter}_FROM`]) {
+ config.replace.push({
+ from: process.env[`REPLACE_${counter}_FROM`],
+ to: process.env[`REPLACE_${counter}_TO`],
+ })
+ counter++
+}
+
 // Validate and normalize ICS configurations
 config.ics = (() => {
  const n = []
@@ -55,12 +65,23 @@ async function cache(url, fun) {
 // The little magic, microsoft is too lazy to implement...
 async function doIcsFix(url) {
  return await cache(url, async () => {
- const raw = await fetch(url).then(res => res.text())
+ const raw = await (async () => {
+ let t = await fetch(url).then(res => res.text())
+ for (const r of config.replace) {
+ t = t.replaceAll(r.from, r.to)
+ }
+ return t
+ })()
  const obj = await ical.async.parseICS(raw)
  const events = []
  for (const key in obj) {
  const event = obj[key]
- if (!event.uid) continue
+ if (event.type !== 'VEVENT') continue
+ if (!event.uid) {
+ console.warn('Event without UID:', event)
+ continue
+ }
+ console.log(event.summary)
  const getTime = (x, t) => {
  try {
  const d = new Date(t)
@@ -74,15 +95,26 @@ async function doIcsFix(url) {
  } catch (ignored) {}
  return []
  }
+ const getString = (x, t) => {
+ if (!t || t === '') return []
+ return [`${x}:${t.toString().replaceAll('\r\n', ' ').replaceAll('\n', ' ')}`]
+ }
  events.push([
  `BEGIN:VEVENT`,
  `UID:${event.uid}`,
  ...getTime('DTSTART', event.start),
  ...getTime('DTEND', event.end),
  ...getTime('DTSTAMP', event.start),
- `STATUS:${(event.status || '').toString().replaceAll('\n', ' ')}`,
- `LOCATION:${(event.location || '').toString().replaceAll('\n', ' ')}`,
- `SUMMARY:${(event.summary || '').toString().replaceAll('\n', ' ')}`,
+ ...getString('STATUS', event.status),
+ ...getString('SUMMARY', event.summary),
+ ...getString('LOCATION', event.location),
+ ...getString('DESCRIPTION', event.description),
+ ...getString('URL', event.url),
+ ...getString('PRIORITY', event.priority),
+ ...getString('CLASS', event.class),
+ ...getString('SEQUENCE', event.sequence),
+ ...getString('TRANSP', event.transparency),
+ ...getString('RRULE', event.rrule),
  `END:VEVENT`
  ].join('\n'))
  }
@@ -94,10 +126,16 @@ async function doIcsFix(url) {
  (
  raw.split('\n').find(l => l.startsWith('X-WR-CALNAME:')
  ) || ':Missing Calendar Name!').split(':')[1]
- ).replaceAll('\n', ' ')}`,
- events.join('\n'),
+ ).replaceAll('\r\n', ' ').replaceAll('\n', ' ')}`,
+ ...events.filter(e => e),
  `END:VCALENDAR`
- ].join('\n').replaceAll('\n', '\r\n')
+ ]
+ .join('\n')
+ .split('\n')
+ .map(x => x.length > 75 ? x.match(/.{1,75}/g).join('\n ') : x)
+ .join('\n')
+ .replaceAll('\r\n', '\n')
+ .replaceAll('\n', '\r\n')
  })
 }
 
@@ -106,7 +144,13 @@ app.get('*', (req, res) => {
  const path = req.path.substring(1)
 
  const sendICS = (string) => {
- res.set('Content-Type', 'text/calendar')
+ // if req params contains as-text, send as text
+ if (req.query['as-text']) {
+ res.set('Content-Type', 'text/plain')
+ } else {
+ res.set('Content-Disposition', 'attachment; filename="calendar.ics"')
+ res.set('Content-Type', 'text/calendar')
+ }
  res.send(string)
  }
 

src/ms-ics-fix/package.json

@@ -1,6 +1,12 @@
 {
+ "scripts": {
+ "dev": "ICS_ON_DEMAND=true nodemon node index.js"
+ },
  "dependencies": {
  "express": "^4.19.2",
  "node-ical": "^0.18.0"
+ },
+ "devDependencies": {
+ "nodemon": "^3.1.0"
  }
 }