Initialisation

Added the packages and files for the backend server

node_modules/node-abort-controller/index.js

@@ -0,0 +1,68 @@
+const { EventEmitter } = require("events");
+
+class AbortSignal {
+  constructor() {
+    this.eventEmitter = new EventEmitter();
+    this.onabort = null;
+    this.aborted = false;
+    this.reason = undefined;
+  }
+  toString() {
+    return "[object AbortSignal]";
+  }
+  get [Symbol.toStringTag]() {
+    return "AbortSignal";
+  }
+  removeEventListener(name, handler) {
+    this.eventEmitter.removeListener(name, handler);
+  }
+  addEventListener(name, handler) {
+    this.eventEmitter.on(name, handler);
+  }
+  dispatchEvent(type) {
+    const event = { type, target: this };
+    const handlerName = `on${type}`;
+
+    if (typeof this[handlerName] === "function") this[handlerName](event);
+
+    this.eventEmitter.emit(type, event);
+  }
+  throwIfAborted() {
+    if (this.aborted) {
+      throw this.reason;
+    }
+  }
+  static abort(reason) {
+    const controller = new AbortController();
+    controller.abort();
+    return controller.signal;
+  }
+  static timeout(time) {
+    const controller = new AbortController();
+    setTimeout(() => controller.abort(new Error("TimeoutError")), time);
+    return controller.signal;
+  }
+}
+class AbortController {
+  constructor() {
+    this.signal = new AbortSignal();
+  }
+  abort(reason) {
+    if (this.signal.aborted) return;
+
+    this.signal.aborted = true;
+
+    if (reason) this.signal.reason = reason;
+    else this.signal.reason = new Error("AbortError");
+
+    this.signal.dispatchEvent("abort");
+  }
+  toString() {
+    return "[object AbortController]";
+  }
+  get [Symbol.toStringTag]() {
+    return "AbortController";
+  }
+}
+
+module.exports = { AbortController, AbortSignal };