Add a method to check if a datetime matches an rrule (or rruleset)

[msdrigg]

Currently this is possible with the iterator, but it could be made a lot more efficient with a dedicated method (and without any of the security concerns that come with the iterator).

[fmeringdal]

The iterator is the only way to generate occurrences and every method just builds on top of the iterator. So I am not sure what you mean by "a lot more efficient with a dedicated method". Can you please elaborate on how you would make a method that is more efficient without using the iterator?

EDIT: Oh you probably mean checking if a datetime matches all of the criteria in the rrule?

[msdrigg]

EDIT: Oh you probably mean checking if a datetime matches all of the criteria in the rrule?

This is exactly what I am looking for.

[msdrigg]

Basically my problem is this: I want to know if a datetime occurs in my rruleset sequence. Something like:

let in_sequence: bool = rrule.build(dt_start).unwrap().into_iter().find(|val| val == datetime).is_some()

I think if this new method is added, the following code should be equivalent to the check above (please correct me if I am mistaken on this point)

// New Method `check_match` that checks if datetime matches all criteria of the rrule
rrule.validate(dt_start).unwrap().check_match(datetime) && datetime > dt_start

This new check_match function could be a function on RRule<Validated> and/or RRuleSet.

What do you think of this proposal?

[fmeringdal]

I think it is an interesting use-case, one which I haven't thought about before. I don't have too much time these days to implement it, but if you want to give it a try I would be happy to help and merge it when ready.