feature: mmsi and uuid validate

Validate mmsi to be 9 digits and uuid to have the right format.
Require either mmsi or uuid to be set.
Validation added to 'vessel' endpoint that admin UI
uses so that admin UI shows the error message.

src/serverroutes.js

@@ -39,6 +39,9 @@ const defaultSecurityStrategy = './tokensecurity'
 const skPrefix = '/signalk/v1'
 import { SERVERROUTESPREFIX } from './constants'
 
+const MMSIPATTERN = /^\d{9}$/
+const UUIDPATTERN = /^urn:mrn:signalk:uuid:[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-4[0-9A-Fa-f]{3}-[89ABab][0-9A-Fa-f]{3}-[0-9A-Fa-f]{12}$/
+
 module.exports = function(app, saveSecurityConfig, getSecurityConfig) {
   let securityWasEnabled
   let restoreFilePath
@@ -637,10 +640,27 @@ module.exports = function(app, saveSecurityConfig, getSecurityConfig) {
     })
   }
 
-  app.put(`${SERVERROUTESPREFIX}/vessel`, (req, res, next) => {
+  app.put(`${SERVERROUTESPREFIX}/vessel`, (req, res) => {
+    console.log(JSON.stringify(req.body, null, 2))
     const de = app.config.baseDeltaEditor
     let vessel = req.body
 
+    if (!vessel.mmsi && !vessel.uuid) {
+      res.status(400)
+      res.send(`You must provide either mmsi or uuid`)
+      return
+    }
+    if (vessel.mmsi && !vessel.mmsi.match(MMSIPATTERN)) {
+      res.status(400)
+      res.send(`MMSI must be a number with 9 digits`)
+      return
+    }
+    if (vessel.uuid && !vessel.uuid.match(UUIDPATTERN)) {
+      res.status(400)
+      res.send(`Uuid must be a v4 UUID with prefix urn:mrn:signalk:uuid:`)
+      return      
+    }
+
     de.setSelfValue('name', vessel.name)
     app.config.vesselName = vessel.name
     de.setSelfValue('mmsi', vessel.mmsi)