Advanced BLOCKS Techniques - Channel Encryption & Meta Attributes BLOCK

pubnub_encrypt_block.js

export default (request) => {
    // NOTE: message metadata attributes are stored in `request.params.meta`
    // NOTE: overall metadata attributes are stored in `request.meta`
    // NOTE: message metadata attributes are a JSON string, read-write, but must be parsed/stringified to change
    // NOTE: overall metadata attributes are read-only
    if (request && request.params && request.params.meta) {
        let attrs = JSON.parse(request.params.meta);
        
        // to show attrs or request, uncomment:
        // console.log(attrs);
        // console.log(request);

        //
        // take action based on meta attrs
        //
        if (attrs['severity'] == 'high') {
            // see https://www.pubnub.com/blocks-catalog/pagerduty-incident-management-and-realtime-alerts/
            console.log("HIGH - create incident via XHR/HTTPS Ops API");
        } else if (attrs['severity'] == 'medium') {
            // see https://www.pubnub.com/blocks-catalog/offline-notifier-block/
            //  or https://www.pubnub.com/blocks-catalog/clicksend-sms/
            console.log("MEDIUM - send message via XHR/SMS gateway");
        } else if (attrs['severity'] == 'low') {
            // see https://www.pubnub.com/blocks-catalog/sendgrid/
            console.log("LOW - send message via XHR/EMAIL gateway");
        }
    }

    // NOTE - pass on message unchanged (must when 
    // cipherKey encryption is used by clients)
    return request.ok();
}