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smsglue.js
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smsglue.js
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const os = require('os');
const fs = require('fs');
const path = require('path')
const log = require('npmlog');
const crypto = require('crypto');
const moment = require('moment');
const momenttz = require('moment-timezone');
const request = require('request');
function SMSglue(token, origin = '') {
this.token = token;
this.origin = origin;
this.user = false;
this.pass = false;
this.did = false;
this.dst = false;
this.msg = false;
this.valid = false;
this.id = false;
try {
// Decode and parse token JSON to object
var decryptedToken = SMSglue.decrypt(this.token.split('-')[1]);
// Save token values
this.user = decryptedToken.user.trim();
this.pass = decryptedToken.pass.trim();
this.did = decryptedToken.did.replace(/\D/g,'');
// Determine identifer from DID
this.id = this.did.substring(6) + '-' + SMSglue.encrypt(this.did);
} catch(e) {}
// Validate token values (username is email address, password 8 charactors or more, did 10 digits)
this.valid = ((this.user.toString().includes('@')) && (this.pass.toString().length >= 8) && (this.did.toString().length == 10)) ? true : false;
this.hooks = {
// This URL must be manually entered into Acrobits Softphone/Groundwire to enabled the next URLs
provision: `${this.origin}/provision/${this.id}`,
// Acrobits calls this URL to send us the push token and app id (needed for notifications)
report: `${this.origin}/report/${this.id}/%pushToken%/%pushappid%`,
// This URL is added to voip.ms to be called whenever a new SMS is received (it deletes the local cache of SMSs)
notify: `${this.origin}/notify/${this.id}`,
// Acrobits refresh the list of SMSs with this URL whenever the app is opened or a notification is received
fetch: `${this.origin}/fetch/${this.token}/%last_known_sms_id%`,
// Acrobits submits to this URL to send SMS messages
send: `${this.origin}/send/${this.token}/%sms_to%/%sms_body%`
}
}
// STATIC FUNCTIONS
SMSglue.save = function(type, id, value, cb = function(){}) {
var filename = path.resolve('cache', type, id);
fs.writeFile(filename, value, 'utf8', cb);
}
SMSglue.load = function(type, id, cb = function(){}) {
var filename = path.resolve('cache', type, id);
fs.readFile(filename, 'utf8', cb);
}
SMSglue.clear = function(type, id, cb = function(){}) {
var filename = path.resolve('cache', type, id);
fs.unlink(filename, cb);
}
// Get crypto key (and generate if it doesn't exist yet)
SMSglue.load('key', 'key', (err, key) => {
SMSglue.KEY = key;
if (err) {
SMSglue.KEY = require('randomstring').generate();
SMSglue.save('key', 'key', SMSglue.KEY);
}
});
SMSglue.ALGO = 'aes192';
SMSglue.encrypt = function(text, salt=false) {
var key = (salt) ? SMSglue.KEY+salt : SMSglue.KEY;
var cipher = crypto.createCipher(SMSglue.ALGO, key);
var crypted = cipher.update(JSON.stringify(text), 'utf8', 'hex');
crypted += cipher.final('hex');
return crypted;
}
SMSglue.decrypt = function(text, salt=false) {
var key = (salt) ? SMSglue.KEY+salt : SMSglue.KEY;
try {
var decipher = crypto.createDecipher(SMSglue.ALGO, key);
var decrypted = decipher.update(text, 'hex', 'utf8')
decrypted += decipher.final('utf8');
return JSON.parse(decrypted);
} catch(e) {
return false;
}
}
SMSglue.date = function(d=undefined) {
return moment.utc(d).format("YYYY-MM-DDTHH:mm:ss.SSZ");
}
// Parse request body, return object only if valid JSON and status == 'success'
SMSglue.parseBody = function(body) {
try {
body = JSON.parse(body);
return (body.status == 'success') ? body : false;
} catch(e) {
return false;
}
}
// Send notification messages to all devices under this account
SMSglue.notify = function(id, cb) {
// Read the cached push token and app id
SMSglue.load('devices', id, (err, encrypted) => {
// Decrypt and prep
var sent = 0, hasError = false, validDevices = [];
var devices = SMSglue.decrypt(encrypted) || [];
// No devices to notify, hit the callback now
if (!devices.length) cb();
// This will be called after each request, but only do anything after the final request
var updateCachedDevices = function() {
// log.info('updateCachedDevices', `sent count: ${sent}`);
// If number of messages sent matches the number of devices...
if (sent >= devices.length) {
// log.info('updateCachedDevices', 'sent matches device length');
// If there was a push error, rewrite the devices file with on the valid devices
if (hasError) {
SMSglue.save('devices', id, SMSglue.encrypt(validDevices));
}
// All finished, hit the callback
cb();
}
}
// Send push notification to all devices on this account
devices.forEach((device) => {
request({
method: 'POST',
url: 'https://pnm.cloudsoftphone.com/pnm2',
form: {
verb: 'NotifyTextMessage',
AppId: device.AppId,
DeviceToken: device.DeviceToken
}
// On complete, add 1 to the sent counter, flag if there was an error (or add valid device if not) and call function above
}, (error) => {
sent++;
if (error) hasError = true;
else validDevices.push(device);
updateCachedDevices();
});
});
});
}
// INSTANCE METHODS
SMSglue.prototype.request = function(query = {}, callback) {
let options = {
method: 'GET',
url: 'https://www.voip.ms/api/v1/rest.php',
headers: {
'User-Agent': 'smsglue',
},
qs: {
api_username: this.user,
api_password: this.pass,
did: this.did
}
};
Object.assign(options.qs, query);
// log.info('request', options);
request(options, callback);
}
// Enable SMS messages in voip.ms account and set SMS URL Callback
SMSglue.prototype.enable = function(cb) {
var URL = this.hooks.notify;
this.request({
method: 'setSMS',
enable: 1,
url_callback_enable: 1,
url_callback: URL,
url_callback_retry: 1
}, cb);
}
// Send SMS message
SMSglue.prototype.send = function(dst, msg, cb) {
// Clean up number and message text
dst = dst.replace(/\D/g,'');
msg = msg.trim();
// Remove leading '1' on 11-digit phone numbers
if ((dst.length == 11) && (dst.charAt(0) == '1')) {
dst = dst.slice(1);
}
// Validate destination number and message text
if ((dst.length != 10) || (msg.length < 1)) {
cb(true);
return;
}
// Recursively send 160 character chunks
var sendMessage = (message = '') => {
// log.info(`${this.did} -> ${dst}`, message);
var thisMessage = message.substring(0, 160);
var nextMessage = message.substring(160);
var callback = (nextMessage.length) ? () => { sendMessage(nextMessage) } : cb;
// Submit request to send message
this.request({
method: 'sendSMS',
dst: dst,
message: thisMessage,
}, callback);
}
// Start it off
sendMessage(msg);
}
// Get SMS messages
SMSglue.prototype.get = function(cb) {
// Query voip.ms for received SMS messages ranging from 90 days ago to tomorrow
this.request({
method: 'getSMS',
from: moment.utc().subtract(90, 'days').format('YYYY-MM-DD'),
to: moment.utc().add(1, 'day').format('YYYY-MM-DD'),
limit: 9999,
type: 1,
timezone: (momenttz.tz('America/Edmonton').isDST()) ? -1 : 0
// Wait for it...
}, (err, r, body) => {
// Go on if there aren't any errors in the body
if (body = SMSglue.parseBody(body)) {
// Collect all SMS messages in an array of objects with the proper keys and formatting
var smss = body.sms.map( (sms) => {
return {
sms_id: Number(sms.id),
sending_date: SMSglue.date(sms.date),
sender: sms.contact.replace(/\D/g,''),
sms_text: sms.message
}
});
// Save this as a encrypted json file and hit the callback when done
SMSglue.save('messages', this.id, SMSglue.encrypt(smss, this.pass), cb);
// Whoops, there was an error. Hit the callback with the error argument true
} else {
cb(true);
}
});
}
SMSglue.prototype.accountXML = function() {
xml = '<account>';
if (this.valid) {
if (this.hooks.report) xml += `<pushTokenReporterUrl>${this.hooks.report}</pushTokenReporterUrl>`;
if (this.hooks.fetch) xml += `<genericSmsFetchUrl>${this.hooks.fetch}</genericSmsFetchUrl>`;
if (this.hooks.send) xml += `<genericSmsSendUrl>${this.hooks.send}</genericSmsSendUrl>`;
xml += '<allowMessage>1</allowMessage>';
xml += '<voiceMailNumber>*97</voiceMailNumber>';
}
xml += '</account>';
return xml;
}
module.exports = SMSglue;