Initial commit :four_leaf_clover:

1 files changed, 35 insertions, 0 deletions

diff --git a/src/utils/cli/indicator.ts b/src/utils/cli/indicator.ts
new file mode 100644
index 0000000000..3e23f9b274
--- /dev/null
+++ b/src/utils/cli/indicator.ts
@@ -0,0 +1,35 @@
+import * as readline from 'readline';
+
+/**
+ * Indicator
+ */
+export default class {
+	private clock: NodeJS.Timer;
+
+	constructor(text: string) {
+		let i = 0; // Dots counter
+
+		draw();
+		this.clock = setInterval(draw, 300);
+
+		function draw(): void {
+			cll();
+			i = (i + 1) % 4;
+			const dots = new Array(i + 1).join('.');
+			process.stdout.write(text + dots); // Write text
+		}
+	}
+
+	public end(): void {
+		clearInterval(this.clock);
+		cll();
+	}
+}
+
+/**
+ * Clear current line
+ */
+function cll(): void {
+	readline.clearLine(process.stdout, 0); // Clear current text
+	readline.cursorTo(process.stdout, 0, null); // Move cursor to the head of line
+}