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/device.js

@@ -32,7 +32,7 @@ function parseBool(v) {
   else return null;
 }
 
-function sanitizeParameterValue(parameterValue) {
+export function sanitizeParameterValue(parameterValue) {
   if (parameterValue[0] != null) {
     switch (parameterValue[1]) {
       case "xsd:boolean":
@@ -83,8 +83,8 @@ function sanitizeParameterValue(parameterValue) {
   return parameterValue;
 }
 
-function getAliasDeclarations(path, timestamp) {
-  var decs = [];
+export function getAliasDeclarations(path, timestamp) {
+  const decs = [];
 
   function recursive(p, prefix) {
     const pattern = prefix.concat(p);
@@ -113,7 +113,7 @@ function getAliasDeclarations(path, timestamp) {
   return decs;
 }
 
-function unpack(deviceData, path, revision) {
+export function unpack(deviceData, path, revision) {
   let allMatches = [];
   if (!path.alias) {
     for (const p of deviceData.paths.find(path, false, true))
@@ -194,7 +194,13 @@ function unpack(deviceData, path, revision) {
   return allMatches;
 }
 
-function clear(deviceData, path, timestamp, attributes, changeFlags = 0) {
+export function clear(
+  deviceData,
+  path,
+  timestamp,
+  attributes,
+  changeFlags = 0
+) {
   const changeTrackers = {};
 
   timestamp = timestamp || 0;
@@ -254,7 +260,7 @@ function clear(deviceData, path, timestamp, attributes, changeFlags = 0) {
 }
 
 function compareEquality(a, b) {
-  var t = typeof a;
+  const t = typeof a;
   if (
     a === null ||
     a === undefined ||
@@ -268,7 +274,7 @@ function compareEquality(a, b) {
   return JSON.stringify(a) === JSON.stringify(b);
 }
 
-function set(deviceData, path, timestamp, attributes, toClear) {
+export function set(deviceData, path, timestamp, attributes, toClear) {
   path = deviceData.paths.add(path);
 
   const currentTimestamp = deviceData.timestamps.get(path);
@@ -366,7 +372,7 @@ function set(deviceData, path, timestamp, attributes, toClear) {
   return toClear;
 }
 
-function track(deviceData, path, marker, attributes) {
+export function track(deviceData, path, marker, attributes) {
   path = deviceData.paths.add(path);
   let f = 1;
 
@@ -382,7 +388,7 @@ function track(deviceData, path, marker, attributes) {
   cur[marker] |= f;
 }
 
-function clearTrackers(deviceData, tracker) {
+export function clearTrackers(deviceData, tracker) {
   if (Array.isArray(tracker)) {
     for (const v of deviceData.trackers.values())
       for (const t of tracker) delete v[t];
@@ -392,11 +398,3 @@ function clearTrackers(deviceData, tracker) {
     deviceData.changes.delete(tracker);
   }
 }
-
-exports.sanitizeParameterValue = sanitizeParameterValue;
-exports.getAliasDeclarations = getAliasDeclarations;
-exports.unpack = unpack;
-exports.set = set;
-exports.clear = clear;
-exports.track = track;
-exports.clearTrackers = clearTrackers;