Add owners to groups.

lib/db/api.js

@@ -46,6 +46,7 @@ dbapi.saveDevice = function(serial, device) {
       serial: serial
     , present: true
     , provider: device.provider
+    , owner: null
     , status: device.status
     , statusChangedAt: r.now()
     , createdAt: r.now()
@@ -65,6 +66,18 @@ dbapi.saveDeviceStatus = function(serial, status) {
     })
 }
 
+dbapi.setDeviceOwner = function(serial, owner) {
+  return db.run(r.table('devices').get(serial).update({
+    owner: owner
+  }))
+}
+
+dbapi.unsetDeviceOwner = function(serial, owner) {
+  return db.run(r.table('devices').get(serial).update({
+    owner: null
+  }))
+}
+
 dbapi.setDeviceAbsent = function(serial) {
   return db.run(r.table('devices').get(serial).update({
     present: false