WIP

lib/notifier.js

@@ -0,0 +1,90 @@
+'use strict'
+
+var R = require('ramda')
+
+var db = null
+
+function init (_db) {
+  db = _db
+}
+
+function toInt10 (str) { return parseInt(str, 10) }
+
+function jsonParse (event) {
+  return R.assoc('note', JSON.parse(event.note), event)
+}
+
+function sameState (a, b) {
+  return a.note.sessionId === b.note.sessionId && a.note.state === b.note.state
+}
+
+function checkStuckScreen (deviceEvents) {
+  var sortedEvents = R.sortBy(R.compose(toInt10, R.prop('device_time')), R.map(jsonParse, deviceEvents))
+  var noRepeatEvents = R.dropRepeatsWith(sameState, sortedEvents)
+  var lastEvent = R.last(noRepeatEvents)
+  var IDLE_STATES = ['idle', 'dualIdle']
+  var STALE_STATE = 60 * 1000
+
+  if (!lastEvent) {
+    console.log('No data for device')
+    return
+  }
+
+  var state = lastEvent.note.state
+  if (R.contains(state, IDLE_STATES)) {
+    console.log('Machine is idle [OK]')
+    return
+  }
+
+  console.log(lastEvent.age)
+  if (lastEvent.age > STALE_STATE) {
+    console.log('Stale state: ' + state + ' [ALERT]')
+    return
+  }
+
+  console.log('[OK]')
+}
+
+function checkStatus () {
+/*
+  - Fetch devices from devices table
+  - Fetch all machine_events into memory
+  - For each device, verify the following:
+    - stuck on screen
+      - last screen is >5m stale and is not idle screen
+      - report stuck on screen and name of screen
+    - not scanning qr codes?
+    - low bitcoins -- need a separate strategy, but server has this info
+      - var fiatBalance = plugins.fiatBalance();
+    - machine isn't pinging server
+*/
+  db.devices(function (err, devices) {
+    if (err) return console.error(err)
+
+    db.machineEvents(function (err, events) {
+      if (err) return console.error(err)
+
+      devices.rows.forEach(function (deviceRow) {
+        var deviceFingerprint = deviceRow.fingerprint
+        var deviceEvents = events.rows.filter(function (eventRow) {
+          return eventRow.device_fingerprint === deviceFingerprint
+        })
+
+        console.log('DEVICE: ' + deviceRow.fingerprint)
+        checkStuckScreen(deviceEvents)
+      })
+    })
+  })
+}
+
+var _db = require('./postgresql_interface')
+var connectionString = 'postgres://lamassu:lamassu@localhost/lamassu'
+_db.init(connectionString)
+
+init(_db)
+
+checkStatus()
+
+// TODO: How to know which alerts have been sent?
+// Send alert every 10m while alert state
+// Remember last sent alert in memory