@graphistry/falcor/test/data/routes/Lists.js

A JavaScript library for efficient data fetching.

var Observable = require('rx').Observable;
var R = require('@graphistry/falcor-router');
var Cache = require('./../Cache');
module.exports = function() {
    return {
        byIdx: [{
            route: ['lists', R.keys, R.integers],
            get: function (pathSet) {
                return Observable.
                    from(pathSet[1]).
                    flatMap(function (listId) {
                        return Observable.
                            from(pathSet[2]).
                            flatMap(function (idx) {
                                var list = {};
                                var cachedList = Cache().lists[listId];
                                if (cachedList && (cachedList[idx] || Array.isArray(cachedList))) {
                                    var jsong = {
                                        jsonGraph: { lists: list },
                                        paths: [
                                            ['lists', listId, idx]
                                        ]
                                    };

                                    // The reference case
                                    if (Array.isArray(cachedList)) {
                                        list[listId] = cachedList;
                                    } else {
                                        list[listId] = {};
                                        list[listId][idx] = cachedList[idx];
                                    }
                                    return Observable.return(jsong);
                                }
                                return Observable.empty();
                            });
                    });
            }
        }]
    }
};