How to: Automatic/programmable push notifications about docs HOT 6 CLOSED

var AWS = require('aws-sdk');

exports.handler = (event, context, callback) => {
    const pinpoint = new AWS.Pinpoint({ apiVersion: '2016-12-01', region: process.env.PINPOINT_REGION });
    
    let whoSent;
    let whoReceive;
    let content = "tap to view message";

    event && event.Records && event.Records.forEach((record) => {
        console.log('Stream record: ', JSON.stringify(record, null, 2));
        
        if (record.eventName == 'INSERT') {
            whoSent = record.dynamodb.NewImage.senderUserId.S;
            whoReceive = record.dynamodb.NewImage.receiverUserId.S;
            content = record.dynamodb.NewImage.content.S;
        }
    });
    
    // console.log(`executing push notification with content: ${content}, & receiver ${whoReceive}`);
    const sendMessagesParams = {
        ApplicationId: process.env.PINPOINT_APP_ID,
        SendUsersMessageRequest: {
            Users: {
                [whoReceive]: {}
            },
            MessageConfiguration: {
                APNSMessage: {
                    Action: 'OPEN_APP',
                    Title: 'You have a new message',
                    SilentPush: false,
                    Body: content
                },
                GCMMessage: {
                    Action: 'OPEN_APP',
                    Title: 'You have a new message',
                    SilentPush: false,
                    Body: content
                }
            }
        }
    };

    pinpoint.sendUsersMessages(sendMessagesParams, (err, data) => {
        // console.log('sendUsersMessages returned');
        if (err) {
        //   console.log('AN ERROR OCCURED');
          console.log(err, err.stack); // an error occurred
          callback(null, 'error')
        }
        else {
        //   console.log('SEND MESSAGES SUCCEEDED');
        //   console.log(JSON.stringify(data));           // successful response
          callback(null, 'success')
        }
    });
};