the-guard-bot/handlers/commands/leave.ts

import { managesGroup, removeGroup } from '../../stores/group';
import { ExtendedContext } from '../../typings/context';
import { html } from '../../utils/html';
import { isMaster } from '../../utils/config';

const leaveCommandHandler = async (ctx: ExtendedContext) => {
	if (!isMaster(ctx.from)) return null;
	if (typeof ctx.message === 'undefined') return null;
	if (!('text' in ctx.message)) return null;

	const query = ctx.message.text.split(' ').slice(1).join(' ');

	const group = query
		? await managesGroup(
				/^-?\d+/.test(query) ? { id: +query } : { title: query }
		  )
		: ctx.chat;
	if (!group) {
		return ctx.replyWithHTML('❓ <b>Unknown group.</b>');
	}

	await removeGroup(group);
	await ctx.replyWithHTML(html`✅ <b>I no longer manage ${group.title}.</b>`);
	return ctx.telegram.leaveChat(group.id);
};

export = leaveCommandHandler;