feat: client options can now be provided through environment variables

src/client.ts

@@ -2,23 +2,27 @@ import got, { Got } from "got";
 
 export interface ClientOptions {
   /**
-   * The base URL of the Moodle site to send API requests to.
+   * The base URL of the Moodle site to send API requests to. If this value
+   * is not provided, then the client falls back to the `JOODLE_BASE_URL`
+   * environment variable.
    */
-  baseURL: string;
+  baseURL?: string;
 
   /**
    * The token used to authenticate with the Moodle site's Web Services API.
+   * If this value is not provided, then the client falls back to the
+   * `JOODLE_TOKEN` environment variable.
    */
-  token: string;
+  token?: string;
 }
 
 /**
  * A client that can send HTTP requests to a Moodle site's Web Services API.
  */
 export abstract class Client {
-  private baseURL: string;
+  private baseURL?: string;
 
-  private token: string;
+  private token?: string;
 
   public got: Got;
 
@@ -28,9 +32,15 @@ export abstract class Client {
    *
    * @param options The client's configuration options.
    */
-  public constructor(options: ClientOptions) {
-    this.baseURL = options.baseURL;
-    this.token = options.token;
+  public constructor(options?: ClientOptions) {
+    this.baseURL = (options && options.baseURL) || process.env.JOODLE_BASE_URL;
+    this.token = (options && options.token) || process.env.JOODLE_TOKEN;
+
+    if (this.baseURL === undefined) {
+      throw new Error("`baseURL` cannot be undefined!");
+    } else if (this.token === undefined) {
+      throw new Error("`token` cannot be undefined!");
+    }
 
     this.got = got.extend({
       prefixUrl: this.baseURL,

src/index.ts

@@ -15,10 +15,12 @@ export class Joodle extends Client {
   /**
    * Initializes a new Joodle client instance for making API calls to Moodle's
    * Web Services API.
+   *
    * @param options The client's configuration options.
    */
-  public constructor(options: ClientOptions) {
+  public constructor(options?: ClientOptions) {
     super(options);
+
     this.auth = new AuthModule(this);
     this.core = new CoreModule(this);
   }