Suggestion: add support to humanize ical rrule

[ecornely]

Hello,

Thanks for that wonderful library.

In a project, I'll probably need to humanize some recurrence rules.

I don't know yet if I'll have to code it, but I thought it would definitely could be part of what this lib is able to do. I'm more a Java developer than python and I don't know how you could not introduce new dependencies to keep this lib lightweight or create an optional sub-module or whatever but I really think it could be a nice added feature.

[hugovk]

Thanks for the suggestion. My first impression is it might be out of scope, but please could you give some examples of input and expected output?

[ecornely]

Something like that:
FREQ=DAILY => Repeats everyday
FREQ=MONTHLY;BYMONTHDAY=1 => Repeats on the first day of every month
FREQ=YEARLY;BYMONTH=3;BYMONTHDAY=17 => Repeats on March 17th of every year
FREQ=WEEKLY;INTERVAL=2;BYDAY=SU,TH => Repeats every other week on Sundays and Thursdays
FREQ=MONTHLY;BYDAY=3WE => Repeats on the third Wednesday of every month

Though I don't know if it has to always starts with Repeats or build the description in a different way. That might even be some options to generate in different "sentences"

And this if course in different languages.

[hugovk]

Here's a blog post on "The Deceptively Complex World of RRULEs in Calendar Events":

• https://www.nylas.com/blog/calendar-events-rrules/

Which links to the spec in RFC 2445:

• https://datatracker.ietf.org/doc/html/rfc2445#section-4.8.5.4

For comparison, here's a Go library to humanise RRULEs:

• https://github.com/skillcoder/hrrule-go