Add support for ICS Files

[captn3m0]

Discussed previously on HN: https://news.ycombinator.com/item?id=20034030

I tried it out, and while Safari doesn't let you subscribe to a calendar directly, you can add it to iOS via Settings->Accounts->Add Account->Others->Subscribe to Calendar configuration.

A simple ICS file that provides a notification 1 year, 6 months, 3 months, 1 month, 1 week, and on the day of EoL is what I'm planning for.

[ppaeps]

On macOS, Safari simply downloads text/calendar files so you can import them into your calendar of choice. Perhaps there is another MIME type that behaves more magically on these (and other?) implementations.

[captn3m0]

Seems like if you throw a webcal protocol link at it, it works: https://discussions.apple.com/thread/2683155

iOS does detect the mime-type correctly, but doesn't offer to subscribe to the calendar, just import all events.

[ppaeps]

The webcal:// link works! 👍

[captn3m0]

Pick this if you know a little of Ruby. The intent here is to create a ICS file for each tool, similar to how we do it for JSON files. Ruby has a simple to use icalendar gem that we can use to generate the ICS file.

Each ICS file should include all the dates known about that product. If there isn't enough information to create a ICS file (such as no dates on /iphone) - use a calendar: false to turn off the calendar for that page.

Keep the page URLs as simple as possible: endoflife.date/calendar/php.ics for eg.

Add a link to the ICS file in the product page as well, as a webcal:// link so that anyone can subscribe to the calendar.

Make sure you read through CONTRIBUTING.md to understand the file structure. Also, please read through the HACKING.md file to setup the project locally. Reading these will help you get onboarded faster and make sure that your PR sees a speedy merge.

And finally, we have a very helpful guide for new contributors during Hacktoberfest as well.

There is a very similar issue for RSS support that you might be interested in: #48

[marcwrobel]

I was looking at #48 (comment) and saw the labels for RSS. It may be a good idea to use the same ones in the calendars.

[adriens]

👏