bot.js

const linebot = require('../index.js');

const bot = linebot({
	channelId: process.env.CHANNEL_ID,
	channelSecret: process.env.CHANNEL_SECRET,
	channelAccessToken: process.env.CHANNEL_ACCESS_TOKEN,
	verify: true // default=true
});

bot.on('message', function (event){
  switch (event.message.type){
    case 'text':
			switch (event.message.text) {
				case 'Me':
					event.source.profile().then(function (profile) {
						return event.reply('Hello ' + profile.displayName + ' ' + profile.userId);
					});
					break;
				case 'Picture':
					event.reply({
						type: 'image',
						originalContentUrl: 'https://d.line-scdn.net/stf/line-lp/family/en-US/190X190_line_me.png',
						previewImageUrl: 'https://d.line-scdn.net/stf/line-lp/family/en-US/190X190_line_me.png'
					});
					break;
				case 'Location':
					event.reply({
						type: 'location',
						title: 'LINE Plus Corporation',
						address: '1 Empire tower, Sathorn, Bangkok 10120, Thailand',
						latitude: 13.7202068,
						longitude: 100.5298698
					});
					break;
				case 'Push':
					bot.push('U6350b7606935db981705282747c82ee1', ['Hey!', 'สวัสดี ' + String.fromCharCode(0xD83D, 0xDE01)]);
					break;
				case 'Push2':
					bot.push(['U6350b7606935db981705282747c82ee1', 'U6350b7606935db981705282747c82ee1'], ['Hey!', 'สวัสดี ' + String.fromCharCode(0xD83D, 0xDE01)]);
					break;
				case 'Multicast':
					bot.push(['U6350b7606935db981705282747c82ee1', 'U6350b7606935db981705282747c82ee1'], 'Multicast!');
					break;
				case 'Confirm':
					event.reply({
						type: 'template',
						altText: 'this is a confirm template',
						template: {
							type: 'confirm',
							text: 'Are you sure?',
							actions: [{
								type: 'message',
								label: 'Yes',
								text: 'yes'
							}, {
								type: 'message',
								label: 'No',
								text: 'no'
							}]
						}
					});
					break;
				case 'Multiple':
					return event.reply(['Line 1', 'Line 2', 'Line 3', 'Line 4', 'Line 5']);
					break;
				case 'Version':
					event.reply('linebot@' + require('../package.json').version);
					break;
				default:
					event.reply(event.message.text).then(function (data) {
						console.log('Success', data);
					}).catch(function (error) {
						console.log('Error', error);
					});
					break;
			}
			break;
		case 'image':
			event.message.content().then(function (data) {
				const s = data.toString('base64').substring(0, 30);
				return event.reply('Nice picture! ' + s);
			}).catch(function (err) {
				return event.reply(err.toString());
			});
			break;
		case 'video':
			event.reply('Nice movie!');
			break;
		case 'audio':
			event.reply('Nice song!');
			break;
		case 'location':
			event.reply(['That\'s a good location!', 'Lat:' + event.message.latitude, 'Long:' + event.message.longitude]);
			break;
		case 'sticker':
			event.reply({
				type: 'sticker',
				packageId: 1,
				stickerId: 1
			});
			break;
		default:
			event.reply('Unknow message: ' + JSON.stringify(event));
			break;
	}
});