Compatibility with Mapbox Optimization API

[Bigood]

Original issue

Passing alternative=(true|false) to the Mapbox Optimization API resulted as a bad request, I needed to have the option to remove the query parameter. While looking at the code, I changed a few things to be able to remove steps and pass the roundtrip parameter to the API.

Reference : https://docs.mapbox.com/api/navigation/#optimization

Usecase

  router: L.Routing.mapbox(process.env.REACT_APP_MAPBOX_API_KEY, {
      serviceUrl: 'https://api.mapbox.com/optimized-trips/v1', //Overrides the serviceUrl
      profile : 'mapbox/cycling',
      routingOptions: {
        roundtrip:true, //Wasn't used on the url construction
        steps: false,  //Will be considered as an option
        alternatives: "default" //Will remove the appended option on the URL
      }
    }),

Changes

Mainly on osrm-v1.js, to be compatible Mapbox Optimization API, see attached commits.

[novaknole]

Hi. Any updates on this? have the same mistake and don't want to change source code.

What do I do?

[dcrobertson01]

Yeah - same here. I'd like to get some cycle routes onto the maps ....

[Bigood]

@perliedman It's been a year since I've PR this, any plan to merge it?

[perliedman]

@Bigood yeah sorry about that, I don't use LRM for anything myself these days, so it's hard to find the time/energy to work on it, and easy to miss issues and PRs.

This looks good as far as I can tell, with some minor comments I made to the code. Haven't actually tested the code, but I assume you have tested it still works with "normal" routing as well as with the optimization API?

[Bigood]

Thanks for taking the time to review this! I'll test it again with the most recent API, double check my code, and probably correct some bits.