Switch to OpeningHoursParser

[Don-vip]

Oracle is still threatening to remove Nashorn from Java (to make money with their "GraalVM" stuff).
Java will then no longer provide a JavaScript engine, so we won't be able to run our JS libraries anymore (opening_hours and overpass_turbo).

For opening_hours, there's no need to rewrite the lib in Java, as we can simply use Simon's parser:

​https://github.com/simonpoole/OpeningHoursParser

Some considerations to take into account for "wd":

[00:40:47] <simonpoole> I really need to have a look at generating more descriptive error messages in my parser and add an evaluator but its a month ot two work I suspect
[00:43:07] <simonpoole> don-vip ​https://github.com/mozilla/rhino
[00:44:00] <don-vip> I know it :) rhino was the javascript engine shipped with java 6/7 until oracle introduces nashorn in 8
[00:44:44] <don-vip> but we won't ship an entire javascript engine just for this. Will probably have to rewrite the library in pure java, which isn't a bad thing
[00:45:54] <simonpoole> well my parser currently has only one small known issue
[00:46:10] <simonpoole> outside of that in implements the full spec
[00:47:36] <don-vip> simonpoole do you have a link to your parser?
[00:48:03] <simonpoole> ​https://github.com/simonpoole/OpeningHoursParser
[00:49:25] <don-vip> awesome!
[00:49:41] <don-vip> so no need to rewrite the JS library, you made my day Simon
[00:50:18] <simonpoole> it -is- a bit stricter than ypids in that some of the more abstruse deviations from the spec are not handled and some rarely used stuff wd isn't supported but that would be easy to add
[00:50:51] <don-vip> ok, good to know
[00:51:24] <simonpoole> just to be clear wd is not in the spec
[00:52:08] <don-vip> by wd do you mean weekdays or the literal "wd"?
[00:52:46] <simonpoole> the literal "wd" used as an abbrev for Mo-Fr
[00:52:54] <don-vip> ok
[00:53:15] <don-vip> well it's easy to detect it as an error and suggest Mo-Fr instead
[00:53:15] <simonpoole> the thing is that it is not really clear if weekday definition is actually univerally the same
[00:53:24] <don-vip> ah
[00:53:29] <don-vip> good point
[00:54:39] <simonpoole> so really it should be added to the spec and clearly defined
[00:54:58] <petschge> that might be fun in israel or some muslimic countries
[00:55:07] <simonpoole> exactly