Email recipients chunking to not exceed the limit 10

When implementing new functionalities to send emails, we have to be careful about the NetSuite limitation. A maximum of 10 recipients (recipient + cc + bcc) is only allowed.

So to tackle this issue, we have to chunk the recipients before sending the emails, such that if we got 5 recipients, 3 cc and 4 bcc emails should be sent successfully.

So we can use a function to chunk the recipients so that for the above condition, two emails would be sent.

1. 1st emails with 3 recipients, 3 cc and 4 bcc.
2. 2nd email with 2 recipients, 3 cc and 4 bcc.

/**
             * @description Checks conditions on whether to split or not split the set of                         emails to chunks
             * @param {Array} recipientArr | Recipient Array
             * @param {Array} ccArr | CC Array
             * @param {Array} bccArr | BCC Array
             * @returns {Array>} outputArr
             */
            let classifyEmails = (recipientArr, ccArr, bccArr) => {
                let outputArr = [];
                if ((Number(recipientArr.length) + Number(ccArr.length) + Number(bccArr.length)) > Number(EMAIL_THRESHOLD)) {
                    let possibleRecipientsLengthPerEmail = Number(EMAIL_THRESHOLD) - (Number(ccArr.length) + Number(bccArr.length));
                    outputArr = splitToGroups(recipientArr, possibleRecipientsLengthPerEmail);
                } else {
                    outputArr.push(recipientArr);
                }
                return outputArr;
            };