Change to pure ECMAScript modules

.c8rc

@@ -1,6 +1,6 @@
 {
   "extension": [
-    ".js"
+    ".ts"
   ],
   "exclude": [
     "gulpfile.js",

.eslintrc

@@ -4,7 +4,7 @@
     "plugin:@typescript-eslint/recommended"
   ],
   "parserOptions": {
-    "ecmaVersion": 6,
+    "ecmaVersion": 2019,
     "sourceType": "module"
   },
   "parser": "@typescript-eslint/parser",

.mocharc.json

@@ -1,5 +1,8 @@
 {
     "extension": ["ts"],
     "spec": ["test/*.test.ts"],
-    "require": "ts-node/register"
+    "require": "ts-node/register",
+    "node-option": [
+        "loader=ts-node/esm"
+    ]
 }

README.docs.md

@@ -2,6 +2,8 @@
 
 `dicoogle-client` is a client API to the web services provided by [Dicoogle](https://www.dicoogle.com), the open-source PACS archive, for use in JavaScript applications.
 
+This library is compatible with Dicoogle versions 2 and 3.
+
 ## Top-level API
 
 Documentation was built from our TypeScript definitions, and should be automatically considered by the TypeScript compiler (version 4+).
@@ -14,38 +16,33 @@ Documentation was built from our TypeScript definitions, and should be automatic
 
 ## Installing
 
-### In Node.js
+### Node.js
 
-Install "dicoogle-client" with `npm` and import the default export
-or the named export `dicoogleClient`
-from the "dicoogle-client" module.
+Install `dicoogle-client` with `npm` and
+import the _default_ export or the named export `dicoogleClient`.
 This works both in JavaScript and in TypeScript.
 
 ```javascript
 import dicoogleClient from 'dicoogle-client';
 ```
 
-When not using ES2015 modules, you need to retrieve the export manually:
-
-```typescript
-const {dicoogleClient} = require('dicoogle-client');
-```
-
-### On the browser, no module system
-
-When _not_ using Node.js or any module system, 
-you can build the distributable bundle by running:
+When not using ECMAScript modules (e.g. using CommonJS),
+you need to use an interoperability layer such as [Babel](https://babeljs.io).
+Otherwise, the module will need to be imported dynamically:
 
-```sh
-npm run build
+```javascript
+import('dicoogle-client')
+  .then(m => {
+    const dicoogleClient = m.default;
+  });
 ```
 
-Then include the "dist/dicoogle-client.min.js" file as a script,
-thus exposing the `DicoogleClient` module as a global variable.
+### On a Browser with Bundling
 
-```html
-<script src='path/to/my/libs/dicoogle-client.min.js'></script>
-```
+Install and use `dicoogle-client` like in Node.js.
+The library includes a few uses of `process.env.NODE_ENV`,
+which will need to be replaced in a browser environment.
+See an example of this using webpack [here](https://webpack.js.org/plugins/environment-plugin/#root).
 
 ## Basic Usage
 
@@ -55,7 +52,7 @@ Calling the module function again will change the Dicoogle base URL of that obje
 This object provides a Promise-based API.
 You can write the following code inside an async function:
 
-```JavaScript
+```javascript
 const dicoogle = dicoogleClient("localhost:8080");
 
 // if required, login to the system before using
@@ -73,8 +70,8 @@ for (const r of result) {
 
 Alternatively, the same methods work when passing a callback as the last parameter.
 
-```JavaScript
-const dicoogle = dicoogleClient("localhost:8080").default;
+```javascript
+const dicoogle = dicoogleClient("localhost:8080");
 
 // if required, login to the system before using
 dicoogle.login('admin', 'mysecretpassword', function(error, outcome) {
@@ -99,7 +96,5 @@ dicoogle.login('admin', 'mysecretpassword', function(error, outcome) {
 
 ## Examples
 
-The repository includes two examples of dicoogle-client for simple querying:
-
- - "bin/dicoogle-query-cli.js" is a complete stand-alone Node.js application for querying Dicoogle. This is the source code of the `dicoogle-query` executable.
- - "example/app.html" is a web page demonstrating simple querying.
+ - "bin/dicoogle-query-cli.js" is a complete stand-alone Node.js application for querying Dicoogle.
+  This is the source code of the `dicoogle-query` executable.

README.md

@@ -5,6 +5,9 @@
 This is a web service client API to [Dicoogle](http://www.dicoogle.com), the open-source PACS archive, for use in JavaScript applications.
 This library is compatible with browser-based JavaScript and Node.js. A CLI application for searching medical images in Dicoogle is also included (`dicoogle-query`).
 
+This library intends to be fully compatible with Dicoogle versions 2 and 3,
+and may be updated as future versions of Dicoogle are released.
+
 ## Using the JavaScript API
 
 The full API is documented [here](https://bioinformatics-ua.github.io/dicoogle-client-js).
@@ -53,10 +56,6 @@ Install this package globally (`npm install -g dicoogle-client`), then use `dico
 
 **Example:** `dicoogle-query -p lucene -s "http://demo.dicoogle.com" "Modality:MR"`
 
-## Further Notice
-
-This library is compatible with versions of Dicoogle in the range `>=2.0.0 <3.2.0`, and may be updated as future versions of Dicoogle are released.
-
 ## License
 
 Copyright (C) 2016  Universidade de Aveiro, DETI/IEETA, Bioinformatics Group - http://bioinformatics.ua.pt/

bin/dicoogle-query-cli.js

@@ -6,23 +6,22 @@
  *
  * Usage:
  * dicoogle-query [-k] [-s server_location] [-p provider_name]* QUERY
- *
- * @author Eduardo Pinho (eduardopinho@ua.pt)
  */
-var dicoogleClient = require("../lib");
-var util = require('util');
-var server = "http://localhost:8080";
-var query;
-var keyword = undefined;
-var debug = false;
-var forceTTY = false;
-var forceJSON = false;
-var providers = [];
+import dicoogleClient from "../lib/index.js";
+import { inspect } from 'node:util';
+
+let server = "http://localhost:8080";
+let query;
+let keyword = undefined;
+let debug = false;
+let forceTTY = false;
+let forceJSON = false;
+let providers = [];
 
-var USER = process.env.DICOOGLE_USER;
-var PASSWORD = process.env.DICOOGLE_PASSWORD;
+let USER = process.env.DICOOGLE_USER;
+let PASSWORD = process.env.DICOOGLE_PASSWORD;
 
-for (var i = 2; i < process.argv.length; i++) {
+for (let i = 2; i < process.argv.length; i++) {
   if (process.argv[i] === '--help' || process.argv[i] === '-h') {
     console.log("Usage: dicoogle-query [OPTIONS] QUERY");
     console.log("Description: search for images in Dicoogle using text queries\n");
@@ -75,7 +74,7 @@ process.stdout.on('error', function() {
   // ignore problem, the user must have just closed the consumer
 });
 
-var Dicoogle = dicoogleClient(server);
+let Dicoogle = dicoogleClient(server);
 
 if (USER && PASSWORD) {
   Dicoogle.login(USER, PASSWORD, function(err, out) {
@@ -105,7 +104,7 @@ function doSearch() {
       } else {
         var result = outcome.results || [];
         if ((process.stdout.isTTY && !forceJSON) || forceTTY) {
-          console.log(util.inspect(result, {colors: true, depth: 2}));
+          console.log(inspect(result, {colors: true, depth: 2}));
         } else {
           console.log(JSON.stringify(result));
         }