no-strategy.js

sendReceipt(orderId, userEmail, client) {
        const receiptHTML = this._generateReceiptHtml(orderId, userEmail);
        switch(client) {
            case 'email': {
                sendEmail(receiptHTML, userEmail);
                break;
            }
            case 'slack': {
                sendSlackMessage(receiptHTML, userEmail);
                break;
            }
        }
    }