Post impl for Node based API client

ccm-apiclient-commons/src/main/typescript/ApiClient.ts

@@ -1,4 +1,6 @@
 import * as http from "http";
+import { rejects } from "assert";
+import { timeStamp } from "console";
 
 /**
  * The interface of a client for the LibreCcm RESTful API.
@@ -410,9 +412,9 @@ class NodeResponse implements ApiResponse {
     readonly status: number;
     readonly statusText: string;
 
-    #data: Buffer;
+    #data: Buffer | null;
 
-    constructor(status: number, statusText: string, data: Buffer) {
+    constructor(status: number, statusText: string, data: Buffer | null) {
         this.status = status;
         this.statusText = statusText;
         this.#data = data;
@@ -421,7 +423,11 @@ class NodeResponse implements ApiResponse {
     json(): Promise<Record<string, unknown>> {
         return new Promise((resolve, reject) => {
             try {
+                if (this.#data) {
                     resolve(this.#data.toJSON());
+                } else {
+                    resolve({});
+                }
             } catch (err) {
                 reject(err);
             }
@@ -431,11 +437,15 @@ class NodeResponse implements ApiResponse {
     arrayBuffer(): Promise<ArrayBuffer> {
         return new Promise((resolve, reject) => {
             try {
+                if (this.#data) {
                     const arrayBuf: ArrayBuffer = this.#data.buffer.slice(
                         this.#data.byteOffset,
                         this.#data.byteLength + this.#data.byteLength
                     );
                     resolve(arrayBuf);
+                } else {
+                    resolve(new ArrayBuffer(0));
+                }
             } catch (err) {
                 reject(err);
             }
@@ -445,7 +455,11 @@ class NodeResponse implements ApiResponse {
     text(): Promise<string> {
         return new Promise((resolve, reject) => {
             try {
-                return this.#data.toString();
+                if (this.#data) {
+                    resolve(this.#data.toString());
+                } else {
+                    resolve("");
+                }
             } catch (err) {
                 reject(err);
             }
@@ -511,7 +525,37 @@ export class ApiClientNodeImpl implements LibreCcmApiClient {
         body: unknown,
         searchParams?: Record<string, string>
     ): Promise<ApiResponse> {
-        throw "Not implemented yet.";
+        return new Promise((resolve, reject) => {
+            const url = buildUrl(this.#baseUrl, endpoint, searchParams);
+            const request: http.ClientRequest = http.request(url, {
+                headers: {
+                    Authorization: "",
+                },
+                method: "POST",
+            });
+
+            request.on("response", (response) => {
+                const status: number = response.statusCode
+                    ? response.statusCode
+                    : -1;
+                const statusText: string = response.statusMessage
+                    ? response.statusMessage
+                    : "";
+
+                response.on("end", () => {
+                    const apiResponse: ApiResponse = new NodeResponse(
+                        status,
+                        statusText,
+                        null
+                    );
+                    resolve(apiResponse);
+                });
+            });
+
+            request.on("error", (error) => reject(error));
+
+            request.end();
+        });
     }
 
     put(