Detecting abuse in an inbound PubNub message from within a module

tisane_pubnub_module_before.js

const xhr = require('xhr');
const vault = require('vault');

// Use the PubNub Functions Vault Module to store these keys securely.
// Click the MY SECRETS button on the left.

export default (request) => {
    console.log('1. original', request.message.text);

    const getAPIKey = new Promise((resolve) => {
        vault.get('tisaneApiKey').then((key) => {
            resolve(key);
        });
    });

    return getAPIKey.then((tisaneApiKey) => {
        // the "snippets" setting places the relevant text snippets in the response;
        // by default, only the offset and the length are sent
        return xhr.fetch('https://api.tisane.ai/parse', {
            'method': 'POST',
            'headers': {
                'Ocp-Apim-Subscription-Key': tisaneApiKey
            },
            'body': JSON.stringify({
                'language': 'en', // or whatever language you use
                'content': request.message.text,
                'settings': { 'snippets': true }
            })
        });
    }).then((reply) => {
        let responseJson = JSON.parse(reply.body);
        if (responseJson.abuse) {
            // enrich the message with the relevant information
            request.message.tisane_abuse_detected = responseJson.abuse;
            console.log('2. possible abuse found', responseJson);
            return request.abort(); // return back to the sender
        } else {
            return request.ok();
        }
    }).catch((err) => {
        console.error(err);
        return request.abort();
    });
};