feat(bling.ts): add logic to prevent multiple instantiations of the s…

…ame entity

src/bling.ts

@@ -7,7 +7,9 @@ import axios, { AxiosInstance } from 'axios'
 import createError from './core/createError'
 
 export default class Bling {
-  private api: AxiosInstance
+  #api: AxiosInstance
+  #products: Products | undefined
+  #orders: Orders | undefined
 
   constructor (apiKey: string) {
     if (!apiKey || typeof apiKey !== 'string') {
@@ -28,18 +30,23 @@ export default class Bling {
         apikey: apiKey,
         ...config.params
       }
-
       return config
     })
 
-    this.api = api
+    this.#api = api
   }
 
   public products () {
-    return new Products(this.api)
+    if (!this.#products) {
+      this.#products = new Products(this.#api)
+    }
+    return this.#products
   }
 
   public orders () {
-    return new Orders(this.api)
+    if (!this.#orders) {
+      this.#orders = new Orders(this.#api)
+    }
+    return this.#orders
   }
 }

tsconfig.json

@@ -1,13 +1,18 @@
 {
   "compilerOptions": {
-    "target": "es5",
+    "target": "es6",
     "module": "commonjs",
     "declaration": true,
     "outDir": "./lib",
     "strict": true,
     "esModuleInterop": true,
     "allowJs": true
   },
-  "include": ["src"],
-  "exclude": ["node_modules", "test/*"]
+  "include": [
+    "src"
+  ],
+  "exclude": [
+    "node_modules",
+    "test/*"
+  ]
 }