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/query.js

@@ -18,7 +18,7 @@
  */
 "use strict";
 
-const common = require("./common");
+import * as common from "./common";
 
 function stringToRegexp(input, flags) {
   if (input.indexOf("*") === -1) return false;
@@ -53,7 +53,7 @@ function normalize(input) {
   return input;
 }
 
-function expandValue(value) {
+export function expandValue(value) {
   if (common.typeOf(value) === common.ARRAY_TYPE) {
     let a = [];
     for (const j of value) a = a.conact(expandValue(j));
@@ -104,7 +104,7 @@ function permute(param, val) {
   return conditions;
 }
 
-function expand(query) {
+export function expand(query) {
   const newQuery = {};
   for (const [k, v] of Object.entries(query)) {
     if (k[0] === "$") {
@@ -157,7 +157,7 @@ function testExpressions(params, expressions, lop) {
   }
 }
 
-function test(params, query) {
+export function test(params, query) {
   let res;
   for (const [k, v] of Object.entries(query)) {
     if (k.charAt(0) === "$") {
@@ -233,7 +233,7 @@ function matchType(src, dst) {
   return dst;
 }
 
-function testFilter(obj, filter) {
+export function testFilter(obj, filter) {
   for (const [k, v] of Object.entries(filter)) {
     const [param, op] = k.split(/([^a-zA-Z0-9\-_.].*)/, 2);
     const val = matchType(obj[param], v);
@@ -264,7 +264,7 @@ function testFilter(obj, filter) {
   return true;
 }
 
-function convertMongoQueryToFilters(query, filters) {
+export function convertMongoQueryToFilters(query, filters) {
   filters = filters || {};
   for (let [k, v] of Object.entries(query)) {
     if (k[0] === "$") {
@@ -346,7 +346,7 @@ function convertMongoQueryToFilters(query, filters) {
   return filters;
 }
 
-function sanitizeQueryTypes(query, types) {
+export function sanitizeQueryTypes(query, types) {
   for (const [k, v] of Object.entries(query)) {
     if (k[0] === "$") {
       // Logical operator
@@ -383,9 +383,3 @@ function sanitizeQueryTypes(query, types) {
 
   return query;
 }
-
-exports.expand = expand;
-exports.test = test;
-exports.sanitizeQueryTypes = sanitizeQueryTypes;
-exports.convertMongoQueryToFilters = convertMongoQueryToFilters;
-exports.testFilter = testFilter;