Sets up context for using CollectionsFS with FlowRouterSSR. Allows the .url() function to work server side.

FlowRouterSSR and CollectionsFS

//Hack to make CollectionFS work with FlowRouter.
if (Meteor.isServer) {
    let originalFind = Collections.Media.find;
    let originalFindOne = Collections.Media.findOne;

    Collections.Media.__proto__.findOne = function (selector, options) {
        let self = this;
        return FlowRouter.ssrContext.withValue(null, function() {
            return originalFindOne.call(self, selector, options);
        });
    };

    Collections.Media.__proto__.find = function (selector, options) {
        let self = this;
        return FlowRouter.ssrContext.withValue(null, function() {
            return originalFind.call(self, selector, options);
        }); 
    };
}