feat: add empty and refill unit machine actions

fix: remove certain actions from the state middleware after being consumed by the poller

lib/middlewares/populateSettings.js

@@ -37,6 +37,14 @@ function machineAction (type, value) {
       logger.debug(`Restarting services of machine '${deviceId}' from operator ${operatorId}`)
       state.restartServicesMap[operatorId] = { [deviceId]: pid }
       break
+    case 'emptyUnit':
+      logger.debug(`Emptying units from machine '${deviceId}' from operator ${operatorId}`)
+      state.emptyUnit[operatorId] = { [deviceId]: pid }
+      break
+    case 'refillUnit':
+      logger.debug(`Refilling stackers from machine '${deviceId}' from operator ${operatorId}`)
+      state.refillUnit[operatorId] = { [deviceId]: pid }
+      break
     default:
       break
   }

lib/middlewares/state.js

@@ -15,6 +15,8 @@ module.exports = (function () {
     reboots: {},
     shutdowns: {},
     restartServicesMap: {},
+    emptyUnit: {},
+    refillUnit: {},
     mnemonic: null
   }
 }())