Add support for passing mapping meta data to the request operation & loading state

[falkobuttler]

Add support for passing mapping meta data to the request operation
Add support for checking if a paginator currently loads data

[falkobuttler]

Travis failed but it doesn't seem to be related to my changes.

[falkobuttler]

Anyone? Is this project completely dead?

[valeriomazzeo]

return self.objectRequestOperation.isExecuting;

[valeriomazzeo]

@falkobuttler nope, just been busy :)

I have done something similar in my own project, but I didn't have the time to polish it to integrate it into RestKit.

If you want the metadata to be useful, you need to also do something along the lines of:

    // Expand the path pattern with the path parameters
    NSDictionary *metadata;
    if (pathParameters) {
        NSDictionary *interpolatedParameters;
        RKPathMatcher *pathMatcher = [RKPathMatcher pathMatcherWithPattern:pathPattern];
        path = [pathMatcher pathFromObject:pathParameters addingEscapes:NO interpolatedParameters:&interpolatedParameters];
        
        metadata = @{ @"routing": @{ @"parameters": interpolatedParameters },
                      @"query": @{ @"parameters": queryStringParameters ?: @{} } };
    } else if (queryStringParameters) {
        metadata = @{ @"query": @{ @"parameters": queryStringParameters } };
    }

Also, CI is finally back to business so we can accept new pull requests.
It will need test coverage though.