Convert backend code to ES modules

Bundling code now with Rollup for its flat bundling and tree shaking
support. Front end code still goes through Webpack for browser support.

lib/local-cache.js

@@ -18,16 +18,16 @@
  */
 "use strict";
 
-const vm = require("vm");
-const crypto = require("crypto");
+import vm from "vm";
+import crypto from "crypto";
 
-const config = require("./config");
-const db = require("./db");
-const cache = require("./cache");
-const query = require("./query");
-const logger = require("./logger");
-const scheduling = require("./scheduling");
-const expression = require("./common/expression");
+import * as config from "./config";
+import * as db from "./db";
+import * as cache from "./cache";
+import * as query from "./query";
+import * as logger from "./logger";
+import * as scheduling from "./scheduling";
+import * as expression from "./common/expression";
 
 const REFRESH = 3000;
 const EVICT_TIMEOUT = 60000;
@@ -369,7 +369,7 @@ function refresh(callback) {
   });
 }
 
-function getCurrentSnapshot(callback) {
+export function getCurrentSnapshot(callback) {
   if (Date.now() < nextRefresh) {
     if (callback) return callback(null, currentSnapshot);
     return Promise.resolve(currentSnapshot);
@@ -389,35 +389,35 @@ function getCurrentSnapshot(callback) {
   });
 }
 
-function hasSnapshot(hash) {
+export function hasSnapshot(hash) {
   return snapshots.has(hash);
 }
 
-function getPresets(snapshotKey) {
+export function getPresets(snapshotKey) {
   const snapshot = snapshots.get(snapshotKey);
   if (!snapshot) throw new Error("Cache snapshot does not exist");
   return snapshot.presets;
 }
 
-function getProvisions(snapshotKey) {
+export function getProvisions(snapshotKey) {
   const snapshot = snapshots.get(snapshotKey);
   if (!snapshot) throw new Error("Cache snapshot does not exist");
   return snapshot.provisions;
 }
 
-function getVirtualParameters(snapshotKey) {
+export function getVirtualParameters(snapshotKey) {
   const snapshot = snapshots.get(snapshotKey);
   if (!snapshot) throw new Error("Cache snapshot does not exist");
   return snapshot.virtualParameters;
 }
 
-function getFiles(snapshotKey) {
+export function getFiles(snapshotKey) {
   const snapshot = snapshots.get(snapshotKey);
   if (!snapshot) throw new Error("Cache snapshot does not exist");
   return snapshot.files;
 }
 
-function getConfig(snapshotKey, key, context, now) {
+export function getConfig(snapshotKey, key, context, now) {
   const snapshot = snapshots.get(snapshotKey);
   if (!snapshot) throw new Error("Cache snapshot does not exist");
 
@@ -445,34 +445,23 @@ function getConfig(snapshotKey, key, context, now) {
   return expression.evaluate(snapshot.config[key], context, now || Date.now());
 }
 
-function getAuthConfig(snapshotKey) {
+export function getAuthConfig(snapshotKey) {
   const snapshot = snapshots.get(snapshotKey);
   if (!snapshot) throw new Error("Cache snapshot does not exist");
 
   return snapshot.config.auth;
 }
 
-function getPermissionsConfig(snapshotKey) {
+export function getPermissionsConfig(snapshotKey) {
   const snapshot = snapshots.get(snapshotKey);
   if (!snapshot) throw new Error("Cache snapshot does not exist");
 
   return snapshot.config.permissions;
 }
 
-function getUiConfig(snapshotKey) {
+export function getUiConfig(snapshotKey) {
   const snapshot = snapshots.get(snapshotKey);
   if (!snapshot) throw new Error("Cache snapshot does not exist");
 
   return snapshot.config.ui;
 }
-
-exports.getCurrentSnapshot = getCurrentSnapshot;
-exports.hasSnapshot = hasSnapshot;
-exports.getPresets = getPresets;
-exports.getProvisions = getProvisions;
-exports.getVirtualParameters = getVirtualParameters;
-exports.getFiles = getFiles;
-exports.getConfig = getConfig;
-exports.getAuthConfig = getAuthConfig;
-exports.getPermissionsConfig = getPermissionsConfig;
-exports.getUiConfig = getUiConfig;