update deno-commons-mode.ts

libraries/deno-commons-mod.ts

@@ -439,6 +439,41 @@ export function setKeyRingPassword(
     return;
 }
 
+export class ProcessBar {
+    interval?: number;
+    message: string;
+    constructor(message?: string) {
+        this.message = message || "Processing";
+    }
+    async call<T>(cb: () => Promise<T>, clearLine?: boolean): Promise<T> {
+        this.start();
+        try {
+            return await cb();
+        } finally {
+            this.stop(clearLine);
+        }
+    }
+    start(): void {
+        const startMs = new Date().getTime();
+        let count = 0;
+        this.interval = setInterval(() => {
+            const dots = ".".repeat(((count++) % 10) + 1);
+            const costMs = new Date().getTime() - startMs;
+            let time = `${costMs}ms`;
+            if (costMs > 1000) {
+                time = `${Math.floor(costMs / 1000)}s`;
+            }
+            process.stderr.write(`\r${this.message} ${time} ${dots}\x1b[K`);
+        }, 200);
+    }
+    stop(clearLine?: boolean): void {
+        if (this.interval) {
+            clearInterval(this.interval);
+            process.stderr.write(clearLine ? "\r" : "\n");
+        }
+    }
+}
+
 Deno.test("isOn", () => {
     assertEquals(false, isOn(undefined));
     assertEquals(false, isOn(""));