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/ui/mongodb-functions.js

@@ -1,10 +1,10 @@
 "use strict";
-const mongodb = require("mongodb");
-const expressionParser = require("../common/expression-parser");
-const expression = require("../common/expression");
+import { ObjectID } from "mongodb";
+import { map, parse, stringify } from "../common/expression-parser";
+import { likePatternToRegExp } from "../common/expression";
 
-function processDeviceFilter(filter) {
-  return expressionParser.map(filter, exp => {
+export function processDeviceFilter(filter) {
+  return map(filter, exp => {
     if (!Array.isArray(exp)) return exp;
 
     if (exp[0] === "PARAM") {
@@ -32,7 +32,7 @@ function processDeviceFilter(filter) {
     } else if (
       ["=", "<>", ">", ">=", "<", "<=", "LIKE", "NOT LIKE"].includes(exp[0])
     ) {
-      let e = expressionParser.map(exp, ee => {
+      let e = map(exp, ee => {
         if (
           Array.isArray(ee) &&
           ee[0] === "PARAM" &&
@@ -54,13 +54,12 @@ function processDeviceFilter(filter) {
   });
 }
 
-function processTasksFilter(filter) {
-  return expressionParser.map(filter, exp => {
+export function processTasksFilter(filter) {
+  return map(filter, exp => {
     if (!Array.isArray(exp)) return exp;
     if (["=", "<>", ">", ">=", "<", "<="].includes(exp[0])) {
       const e = exp.slice();
-      if (e[1][0] === "PARAM" && e[1][1] === "_id")
-        e[2] = new mongodb.ObjectID(e[2]);
+      if (e[1][0] === "PARAM" && e[1][1] === "_id") e[2] = new ObjectID(e[2]);
       else if (e[1][0] === "PARAM" && e[1][1] === "timestamp")
         e[2] = new Date(e[2]);
       else if (e[1][0] === "PARAM" && e[1][1] === "expiry")
@@ -71,8 +70,8 @@ function processTasksFilter(filter) {
   });
 }
 
-function processFaultsFilter(filter) {
-  return expressionParser.map(filter, exp => {
+export function processFaultsFilter(filter) {
+  return map(filter, exp => {
     if (!Array.isArray(exp)) return exp;
     if (["=", "<>", ">", ">=", "<", "<="].includes(exp[0])) {
       const e = exp.slice();
@@ -85,7 +84,7 @@ function processFaultsFilter(filter) {
   });
 }
 
-function filterToMongoQuery(filter, negate = false, res = {}) {
+export function filterToMongoQuery(filter, negate = false, res = {}) {
   const op = filter[0];
 
   if ((!negate && op === "AND") || (negate && op === "OR")) {
@@ -160,7 +159,7 @@ function filterToMongoQuery(filter, negate = false, res = {}) {
       param = filter[1][1];
       flags = "";
     }
-    const r = expression.likePatternToRegExp(filter[2], filter[3], flags);
+    const r = likePatternToRegExp(filter[2], filter[3], flags);
     if (negate) res[param] = { $not: r };
     else res[param] = r;
   } else {
@@ -170,7 +169,7 @@ function filterToMongoQuery(filter, negate = false, res = {}) {
   return res;
 }
 
-function processDeviceProjection(projection) {
+export function processDeviceProjection(projection) {
   if (!projection) return projection;
   const p = {};
   for (const [k, v] of Object.entries(projection)) {
@@ -196,7 +195,7 @@ function processDeviceProjection(projection) {
   return p;
 }
 
-function processDeviceSort(sort) {
+export function processDeviceSort(sort) {
   if (!sort) return sort;
   const s = {};
   for (const [k, v] of Object.entries(sort)) {
@@ -217,7 +216,7 @@ function parseDate(d) {
   return isNaN(n) ? "" + d : n;
 }
 
-function flattenDevice(device) {
+export function flattenDevice(device) {
   function recursive(input, root, output, timestamp) {
     for (const [name, tree] of Object.entries(input)) {
       if (!root) {
@@ -361,14 +360,14 @@ function flattenDevice(device) {
   return newDevice;
 }
 
-function flattenFault(fault) {
+export function flattenFault(fault) {
   const f = Object.assign({}, fault);
   if (f.timestamp) f.timestamp = +f.timestamp;
   if (f.expiry) f.expiry = +f.expiry;
   return f;
 }
 
-function flattenTask(task) {
+export function flattenTask(task) {
   const t = Object.assign({}, task);
   t._id = "" + t._id;
   if (t.timestamp) t.timestamp = +t.timestamp;
@@ -443,13 +442,11 @@ function mongoQueryToFilter(query) {
   return expressions;
 }
 
-function flattenPreset(preset) {
+export function flattenPreset(preset) {
   const p = Object.assign({}, preset);
   if (p.precondition) {
     p.precondition = mongoQueryToFilter(JSON.parse(p.precondition));
-    p.precondition = p.precondition.length
-      ? expression.stringify(p.precondition)
-      : "";
+    p.precondition = p.precondition.length ? stringify(p.precondition) : "";
   }
 
   if (p.events) {
@@ -474,7 +471,7 @@ function flattenPreset(preset) {
   return p;
 }
 
-function flattenFile(file) {
+export function flattenFile(file) {
   const f = {};
   f["_id"] = file["_id"];
   if (file.metadata) {
@@ -486,10 +483,10 @@ function flattenFile(file) {
   return f;
 }
 
-function preProcessPreset(data) {
+export function preProcessPreset(data) {
   const preset = Object.assign({}, data);
   preset.precondition = preset.precondition
-    ? filterToMongoQuery(expression.parse(preset.precondition))
+    ? filterToMongoQuery(parse(preset.precondition))
     : {};
   preset.precondition = JSON.stringify(preset.precondition);
 
@@ -526,25 +523,10 @@ function preProcessPreset(data) {
   return preset;
 }
 
-function preProcessProvision(data) {
+export function preProcessProvision(data) {
   return data.script;
 }
 
-function preProcessVirtualParameters(data) {
+export function preProcessVirtualParameters(data) {
   return data.script;
 }
-
-exports.processDeviceFilter = processDeviceFilter;
-exports.processTasksFilter = processTasksFilter;
-exports.processFaultsFilter = processFaultsFilter;
-exports.filterToMongoQuery = filterToMongoQuery;
-exports.processDeviceProjection = processDeviceProjection;
-exports.processDeviceSort = processDeviceSort;
-exports.flattenDevice = flattenDevice;
-exports.flattenFault = flattenFault;
-exports.flattenTask = flattenTask;
-exports.flattenPreset = flattenPreset;
-exports.flattenFile = flattenFile;
-exports.preProcessPreset = preProcessPreset;
-exports.preProcessProvision = preProcessProvision;
-exports.preProcessVirtualParameters = preProcessVirtualParameters;