A mutable URI parser and formatter for use by monkey patches. ql.io lets you monkey patch tables by attaching a Node module with each table. Here is an example of how a monkey patch module could patch the request URI.

//
// Patch the request URI. ql.io engine would use the returned URI.
//
exports['patch uri'] = function(options) {
    var statement = options.statement, uri = options.uri, params = options.params, count = 0;
    if(statement.offset && statement.limit) {
        uri.setParam('paginationInput.pageNumber', statement.offset / statement.limit);
    }
    uri.removeEmptyParams();

    count = 0
    if(params.FreeShippingOnly) {
        uri.addParam("itemFilter(" + count + ").name", 'FreeShippingOnly');
        uri.addParam("itemFilter(" + count + ").value", params.FreeShippingOnly);
        count++;
    }
    if(params.MinPrice) {
        uri.addParam("itemFilter(" + count + ").name", 'MinPrice');
        uri.addParam("itemFilter(" + count + ").value", params.MinPrice);
        count++;
    }
    return uri;
}