import { strlen } from './utils.ts';
import { getRuntime } from './runtime.ts';

class Buffer {
	#b = '';

	constructor() {
	}

	public append(s: string): void {
		this.#b += s;
	}

	public appendLine(s: string): void {
		this.#b += s + '\r\n';
	}

	public clear(): void {
		this.#b = '';
	}

	/**
	 * Output the contents of the buffer into stdout
	 */
	public async flush() {
		const { term } = await getRuntime();
		await term.writeStdout(this.#b);
		this.clear();
	}

	public strlen(): number {
		return strlen(this.#b);
	}
}

export default Buffer;