JS OOP example (messaging provider)

messaging provider

class BaseProvider {
	constructor (_name) {
		if (
			_name == null ||
      _name === undefined ||
      typeof _name !== 'string'
		) {
			throw new Error('Class needs to be instantiated with an provider name')
		}
		this.name = _name
	}

	/**
   * Implementation optional
   */
	name () {
		return this.name
	}

	/**
   * Implementation required
   * @param {String} country Country address operates in
   * @param {Number} areaCode Area code of country
   * @param {String} channel sms (SMS), wa (Whatsapp), fb (Facebook)
   */
	getAddress (country, areaCode, channel) {
		throw new Error('You have to implement the method getPrice!')
	}

	/**
   * Implementation required
   * @param {String} addressId Address ID from provider
   */
	deleteAddress (addressId) {
		throw new Error('You have to implement the method getPrice!')
	}

	/**
   * Implementation required
   * @param {String} addressId Address ID from provider
   */
	sendMessage (addressId) {
		throw new Error('You have to implement the method getPrice!')
	}
}

module.exports = BaseProvider


onst BaseProvider = require('./base')
const TwilioClient = require('twilio')(`${process.env.TWILIO_SID}`, `${process.env.TWILIO_AUTH}`)

class TwilioProvider extends BaseProvider {
	/**
   * Implementation required
   * @param {String} country Country address operates in
   * @param {Number} areaCode Area code of country
   * @param {String} channel sms (SMS), wa (Whatsapp), fb (Facebook)
   */
	async getAddress (country, areaCode, channel) {
		const availableNumber = await TwilioClient.availablePhoneNumbers(country).local.list({ areaCode, limit: 1 })
		return TwilioClient.incomingPhoneNumbers.create({ phoneNumber: availableNumber[0].phone_number, areaCode })
	};

	/**
   * Implementation required
   * @param {String} addressId Address ID from provider
   */
	async deleteAddress (addressId) {
		return TwilioClient.incomingPhoneNumbers(addressId).remove()
	};

	/**
   * Implementation required
   * @param {String} body Message Body
   * @param {String} from Sender Address
   * @param {String} to   Receiver Address
   * @param {String} mediaUrl Media
   */
	async sendMessage (body, from, to, mediaUrl, channel, callback) {
		if (channel == 'wa') {
			to = `whatsapp:${to}`
			from = `whatsapp:${from}`
		} else if (channel == 'fb') {
			to = `messenger:${to}`
			from = `messenger:${from}`
		} else if (channel == 'line') {
			to = `line:${to}`
			from = `line:${from}`
		}
		return mediaUrl ? TwilioClient.messages.create({ body, from, to, mediaUrl }) : TwilioClient.messages.create({ body, from, statusCallback: callback, to })
	};
}

module.exports = new TwilioProvider('Twilio')