WIPP

lib/notifier.js

@@ -6,15 +6,15 @@ const numeral = require('numeral')
 const configManager = require('./config-manager')
 const settingsLoader = require('./settings-loader')
 const db = require('./postgresql_interface')
+const T = require('./time')
+const logger = require('./logger')
 
-const STALE_STATE = 2 * 60 * 1000
-const NETWORK_DOWN_TIME = 60 * 1000
+const STALE_STATE = 2 * T.minute
+const NETWORK_DOWN_TIME = T.minute
+const ALERT_SEND_INTERVAL = T.hour
 
-let getBalances
-
-function init (_getBalances) {
-  getBalances = _getBalances
-}
+let alertFingerprint
+let lastAlertTime
 
 function toInt10 (str) { return parseInt(str, 10) }
 
@@ -26,6 +26,57 @@ function sameState (a, b) {
   return a.note.txId === b.note.txId && a.note.state === b.note.state
 }
 
+function sendNoAlerts (plugins) {
+  const subject = '[Lamassu] All clear'
+  const rec = {
+    sms: {
+      body: subject
+    },
+    email: {
+      subject,
+      body: 'No errors are reported for your machines.'
+    }
+  }
+
+  return plugins.sendMessage(rec)
+}
+
+function checkNotification (plugins) {
+  return checkStatus(plugins)
+  .then(alertRec => {
+    const currentAlertFingerprint = buildAlertFingerprint(alertRec)
+    if (!currentAlertFingerprint) {
+      const inAlert = !!alertFingerprint
+      alertFingerprint = null
+      lastAlertTime = null
+      if (inAlert) return sendNoAlerts(plugins)
+    }
+
+    const alertChanged = currentAlertFingerprint === alertFingerprint &&
+      lastAlertTime - Date.now() < ALERT_SEND_INTERVAL
+    if (alertChanged) return
+
+    const subject = alertSubject(alertRec)
+    const rec = {
+      sms: {
+        body: subject
+      },
+      email: {
+        subject,
+        body: printEmailAlerts(alertRec)
+      }
+    }
+    alertFingerprint = currentAlertFingerprint
+    lastAlertTime = Date.now()
+
+    return plugins.sendMessage(rec)
+  })
+  .then(results => {
+    if (results && results.length > 0) logger.debug('Successfully sent alerts')
+  })
+  .catch(logger.error)
+}
+
 function checkBalance (rec) {
   const settings = settingsLoader.settings()
   const config = configManager.unscoped(settings.config)
@@ -35,8 +86,8 @@ function checkBalance (rec) {
   : null
 }
 
-function checkBalances () {
-  return getBalances()
+function checkBalances (plugins) {
+  return plugins.checkBalances()
   .then(balances => R.reject(R.isNil, balances.map(checkBalance)))
 }
 
@@ -85,10 +136,10 @@ function devicesAndEvents () {
   .then(arr => ({devices: arr[0], events: arr[1]}))
 }
 
-function checkStatus () {
+function checkStatus (plugins) {
   const alerts = {devices: {}, deviceNames: {}}
 
-  return Promise.all([checkBalances(), devicesAndEvents()])
+  return Promise.all([checkBalances(plugins), devicesAndEvents()])
   .then(([balances, rec]) => {
     const devices = rec.devices
     const events = rec.events
@@ -163,16 +214,10 @@ function alertSubject (alertRec) {
   return '[Lamassu] Errors reported: ' + alertTypes.join(', ')
 }
 
-function alertFingerprint (alertRec) {
+function buildAlertFingerprint (alertRec) {
   const subject = alertSubject(alertRec)
   if (!subject) return null
   return crypto.createHash('sha256').update(subject).digest('hex')
 }
 
-module.exports = {
-  init,
-  checkStatus,
-  printEmailAlerts,
-  alertFingerprint,
-  alertSubject
-}
+module.exports = {checkNotification}