feat(notification): add Twillio notification provider (#344)

src/config.ts

@@ -104,6 +104,12 @@ const notifications = {
 		accessToken: envOrString(process.env.TELEGRAM_ACCESS_TOKEN),
 		chatId: envOrString(process.env.TELEGRAM_CHAT_ID)
 	},
+	twilio: {
+		accountSid: envOrString(process.env.TWILIO_ACCOUNT_SID),
+		authToken: envOrString(process.env.TWILIO_AUTH_TOKEN),
+		from: envOrString(process.env.TWILIO_FROM_NUMBER),
+		to: envOrString(process.env.TWILIO_TO_NUMBER)
+	},
 	twitter: {
 		accessTokenKey: envOrString(process.env.TWITTER_ACCESS_TOKEN_KEY),
 		accessTokenSecret: envOrString(process.env.TWITTER_ACCESS_TOKEN_SECRET),

src/notification/notification.ts

@@ -11,6 +11,7 @@ import {sendSMS} from './sms';
 import {sendSlackMessage} from './slack';
 import {sendTelegramMessage} from './telegram';
 import {sendTweet} from './twitter';
+import {sendTwilioMessage} from './twilio';
 
 const notifications = Config.notifications;
 
@@ -53,6 +54,11 @@ export function sendNotification(link: Link, store: Store) {
 		sendTelegramMessage(link, store);
 	}
 
+	if (notifications.twilio.accountSid && notifications.twilio.authToken) {
+		Logger.debug('↗ sending twilio message');
+		sendTwilioMessage(link, store);
+	}
+
 	if (notifications.pushBulletApiKey) {
 		Logger.debug('↗ sending pushbullet message');
 		sendPushBulletNotification(link, store);

src/notification/twilio.ts

@@ -0,0 +1,26 @@
+import {Link, Store} from '../store/model';
+import {Logger, Print} from '../logger';
+import {Config} from '../config';
+import twilio from 'twilio';
+
+const config = Config.notifications.twilio;
+
+const client = twilio(config.accountSid, config.authToken);
+
+export function sendTwilioMessage(link: Link, store: Store) {
+	(async () => {
+		const givenUrl = link.cartUrl ? link.cartUrl : link.url;
+		const message = `${Print.inStock(link, store)}\n${givenUrl}`;
+
+		try {
+			await client.messages.create({
+				body: message,
+				from: config.from,
+				to: config.to
+			});
+			Logger.info('✔ twilio message sent');
+		} catch (error) {
+			Logger.error('✖ couldn\'t send twilio message', error);
+		}
+	})();
+}