Update sample transport to use batching

src/logging/Sample.transport.ts

@@ -1,17 +1,58 @@
 import * as Transport from "winston-transport";
+import { clone } from "@/utils";
 
+// Batching adapted from https://github.com/winstonjs/winston/blob/master/lib/winston/transports/http.js
 export class SampleTransport extends Transport {
+  // Batch
+  private batchEntries: any[] = [];
+  private batchInterval = 2000;
+  private batchCount = 10;
+  private batchTimeoutID = -1;
+
   constructor(opts = {}) {
     super(opts);
   }
 
   log(info: any, callback: () => void): void {
-    setImmediate(() => {
-      this.emit("logged", info);
-    });
+    if (callback) {
+      setImmediate(callback);
+    }
+
+    const cb = (err?: any) => {
+      if (err) {
+        // eslint-disable-next-line no-console
+        console.error(err);
+        this.emit("warn", err);
+      } else {
+        this.emit("logged", info);
+      }
+    };
+
+    this.batchEntries.push(info);
+
+    if (this.batchEntries.length === 1) {
+      // @ts-expect-error Similar type?
+      this.batchTimeoutID = setTimeout(() => {
+        this.batchTimeoutID = -1;
+        this.doBatchRequest(cb);
+      }, this.batchInterval);
+    } else if (this.batchEntries.length === this.batchCount) {
+      this.doBatchRequest(cb);
+    }
+  }
+
+  doBatchRequest(cb: (err?: any) => void) {
+    // Reset timeout ID
+    if (this.batchTimeoutID > 0) {
+      clearTimeout(this.batchTimeoutID);
+      this.batchTimeoutID = -1;
+    }
 
-    // console.log(JSON.stringify(info));
+    const entriesCopy = clone(this.batchEntries);
+    this.batchEntries = [];
 
-    callback();
+    // eslint-disable-next-line no-console
+    // console.log(entriesCopy.map(e => e.message));
+    cb();
   }
 }