Feat: code refactoring and jest tests

chore: More refactoring

chore: More tests and refactors

fix: Fixed age not getting calculated properly

chore: Implemented mocking in jest

chore: More mock tests

chore: checkStuckScreen tests

lib/notifier/email.js

@@ -0,0 +1,100 @@
+const _ = require('lodash/fp')
+const prettyMs = require('pretty-ms')
+const {
+  PING,
+  STALE,
+  LOW_CRYPTO_BALANCE,
+  HIGH_CRYPTO_BALANCE,
+  CASH_BOX_FULL,
+  LOW_CASH_OUT
+} = require('./codes')
+
+function alertSubject(alertRec, config) {
+  let alerts = []
+
+  if (config.balance) {
+    alerts = _.concat(alerts, alertRec.general)
+  }
+
+  _.keys(alertRec.devices).forEach(function (device) {
+    if (config.balance) {
+      alerts = _.concat(alerts, alertRec.devices[device].balanceAlerts)
+    }
+
+    if (config.errors) {
+      alerts = _.concat(alerts, alertRec.devices[device].deviceAlerts)
+    }
+  })
+
+  if (alerts.length === 0) return null
+
+  const alertTypes = _.map(codeDisplay, _.uniq(_.map('code', alerts))).sort()
+  return '[Lamassu] Errors reported: ' + alertTypes.join(', ')
+}
+
+function printEmailAlerts(alertRec, config) {
+  let body = 'Errors were reported by your Lamassu Machines.\n'
+
+  if (config.balance && alertRec.general.length !== 0) {
+    body = body + '\nGeneral errors:\n'
+    body = body + emailAlerts(alertRec.general) + '\n'
+  }
+
+  _.keys(alertRec.devices).forEach(function (device) {
+    const deviceName = alertRec.deviceNames[device]
+    body = body + '\nErrors for ' + deviceName + ':\n'
+
+    let alerts = []
+    if (config.balance) {
+      alerts = _.concat(alerts, alertRec.devices[device].balanceAlerts)
+    }
+
+    if (config.errors) {
+      alerts = _.concat(alerts, alertRec.devices[device].deviceAlerts)
+    }
+
+    body = body + emailAlerts(alerts)
+  })
+
+  return body
+}
+
+function emailAlerts(alerts) {
+  return alerts.map(emailAlert).join('\n') + '\n'
+}
+
+function formatCurrency(num, code) {
+  return numeral(num).format('0,0.00') + ' ' + code
+}
+
+function emailAlert(alert) {
+  switch (alert.code) {
+    case PING:
+      if (alert.age) {
+        const pingAge = prettyMs(alert.age, { compact: true, verbose: true })
+        return `Machine down for ${pingAge}`
+      }
+      return 'Machine down for a while.'
+    case STALE: {
+      const stuckAge = prettyMs(alert.age, { compact: true, verbose: true })
+      return `Machine is stuck on ${alert.state} screen for ${stuckAge}`
+    }
+    case LOW_CRYPTO_BALANCE: {
+      const balance = formatCurrency(alert.fiatBalance.balance, alert.fiatCode)
+      return `Low balance in ${alert.cryptoCode} [${balance}]`
+    }
+    case HIGH_CRYPTO_BALANCE: {
+      const highBalance = formatCurrency(
+        alert.fiatBalance.balance,
+        alert.fiatCode
+      )
+      return `High balance in ${alert.cryptoCode} [${highBalance}]`
+    }
+    case CASH_BOX_FULL:
+      return `Cash box full on ${alert.machineName} [${alert.notes} banknotes]`
+    case LOW_CASH_OUT:
+      return `Cassette for ${alert.denomination} ${alert.fiatCode} low [${alert.notes} banknotes]`
+  }
+}
+
+module.exports = { alertSubject, printEmailAlerts }