Publicize route template parsing API in ngResource

[gsklee]

I've encountered several use cases where I need to parse route templates (eg. /items/:category/:sortBy/:categoryId) using info from $routeParams; a prominent use case is when implementing a custom cache to store backend response plus some corresponding additional information, it will be an array with the parsed route template acting as the key/index of the array.

For the time being I'm doing the parsing by copy-pasting related codes (https://github.com/angular/angular.js/blob/master/src/ngResource/resource.js#L340) into my own projects, but that is overly redundant; if an official API can be created, it would be really great.

[btford]

It should be easy enough to pull this out into its own service. The only difficult part is what to call the service.

[gsklee]

If you can find an awesome name for me I can send in a PR... or I'll just make up one like say $parseRoute or $parseThisRouteTemplateThingie 😉

[btford]

You can always change the name later. I'd make a PR first and we can discuss the name afterwards. :)

[btford]

Duplicate of #738 (continue discussion there please!)