freeplanet_serverside/server/tools/general.js

var os = require("os");

require('../models/subscribers');

var Url = require('url-parse');

const mongoose = require('mongoose');
const Subscription = mongoose.model('subscribers');

const server_constants = require('../tools/server_constants');

// SETTINGS WebPush Configuration
const webpush = require('web-push');

const subject = process.env.URLBASE_APP1; //'mailto:' + process.env.EMAIL_FROM
const publicVapidKey = process.env.PUBLIC_VAPI_KEY;
const privateVapidKey = process.env.PRIVATE_VAPI_KEY;

if (process.env.GCM_API_KEY !== "")
  webpush.setGCMAPIKey(process.env.GCM_API_KEY);

webpush.setVapidDetails(subject, publicVapidKey, privateVapidKey);
console.log('setVapidDetails... config...');


module.exports = {
  getHostname: function () {
    return os.hostname()
  },
  testing: function () {
    return (process.env.TESTING_ON === '1')
  },

  mylog: function (...args) {
    if (!this.testing())
      console.log(args)
  },

  mylogoff: function (...args) {
    // doing nothing
  },

  mylogshow: function (...args) {
    console.log(args)
  },

  mylogserr: function (...args) {
    console.error(args)
  },

  allfieldTodo: function () {
    return ['userId', 'pos', 'category', 'descr', 'priority', 'completed', 'created_at', 'modify_at',
      'completed_at', 'expiring_at', 'enableExpiring', 'id_prev', 'progress', 'modified']
  },

  allfieldTodoWithId: function () {
    return ['_id', ...this.allfieldTodo()]
  },

  sendBackNotif: function (subscription, payload) {

    console.log('sendBackNotif:', subscription, payload);
    // Pass object into sendNotification
    webpush.sendNotification(subscription, JSON.stringify(payload)).catch(err => console.error(err))
      .catch(err => {
        if (err.statusCode === 410) {
          // Gone: is not valid anymore (Expired probably!), so I have to delete from my db
          return Subscription.findOneAndRemove({ _id: subscription._id })
        } else {
          console.log('Subscription is no longer valid: ', err);
        }
      })
  },

  sendNotificationToUser: function (userId, title, content, openUrl, tag) {

    let payload = {
      title: title,
      message: content,
      url: openUrl,
      tag,
      // ttl: req.body.ttl,
      // icon: req.body.icon,
      // image: req.body.image,
      // badge: req.body.badge,
      // tag: req.body.tag
    };

    return Subscription.find({ userId }, (err, subscriptions) => {
      if (err) {
        console.error(`Error occurred while getting subscriptions`);
        res.status(500).json({
          error: 'Technical error occurred'
        });
        return false;
      } else {
        let conta = 0
        let parallelSubscriptionCalls = subscriptions.map((subscription) => {
          const trovati = subscriptions.length
          return new Promise((resolve, reject) => {
            const pushSubscription = {
              endpoint: subscription.endpoint,
              keys: {
                p256dh: subscription.keys.p256dh,
                auth: subscription.keys.auth
              }
            };

            conta++;


            const parse = require('url-parse');
            const parsedUrl = parse(subscription.endpoint);
            const audience = parsedUrl.protocol + '//' + parsedUrl.hostname;

            const vapidHeaders = webpush.getVapidHeaders(
              audience,
              process.env.URLBASE_APP1,
              process.env.PUBLIC_VAPI_KEY,
              process.env.PRIVATE_VAPI_KEY,
              'aes128gcm'
            );

            const pushOptions = {
              vapidDetails: {
                subject: process.env.URLBASE_APP1,
                privateKey: process.env.PRIVATE_VAPI_KEY,
                publicKey: process.env.PUBLIC_VAPI_KEY,
              },
              TTL: payload.ttl,
              headers: vapidHeaders
            };

            console.log('************  INVIO WEBPUSH.SENDNOTIFICATION N° ', conta, '/', trovati, 'A', subscription.browser);
            console.log('vapidDetails', pushOptions.vapidDetails);

            payload.title = process.env.URLBASE_APP1 + ' Msg n° ' + conta + '/' + trovati;
            // payload.message += subscription.browser ;

            const pushPayload = JSON.stringify(payload);

            console.log('A1) SUBS: pushSubscription', pushSubscription);
            console.log('A2) OPZIONI: pushOptions', pushOptions);
            console.log('A3) MSG_TO_SEND: pushPayload', pushPayload);

            webpush.sendNotification(
              pushSubscription,
              pushPayload,
              // pushOptions
            ).then((value) => {
              resolve({
                status: true,
                endpoint: subscription.endpoint,
                data: value
              });
            }).catch((err) => {
              reject({
                status: false,
                endpoint: subscription.endpoint,
                data: err
              });
            });
          }).catch(error => {
            console.log('ERROR: sendNotificationToUser', error.data.body)
          });
        });
        // q.allSettled(parallelSubscriptionCalls).then((pushResults) => {
        //   console.info(pushResults);
        // });
        // res.json({
        //   data: 'Push triggered'
        // });
        return true;
      }
    });

  },
  // **********************
  // SORT WITH PREV_ID
  // **********************
  mapSort: function (linkedList) {
    var sortedList = [];
    var map = new Map();
    var currentId = null;

    // console.log('linkedList', linkedList);

    // index the linked list by previous_item_id
    for (var i = 0; i < linkedList.length; i++) {
      var item = linkedList[i];
      if (item.id_prev === server_constants.LIST_START) {
        // first item
        currentId = String(item._id);
        // console.log('currentId', currentId);
        sortedList.push(item);
      } else {
        map.set(item.id_prev, i);
      }
    }

    while (sortedList.length < linkedList.length) {
      // get the item with a previous item ID referencing the current item
      var nextItem = linkedList[map.get(currentId)];
      if (nextItem === undefined)
        break;
      sortedList.push(nextItem);
      currentId = String(nextItem._id);
    }

    // console.log('DOPO sortedList', sortedList);

    return sortedList;
  }

};