Filtering seekers result

`Tessel.get` and `Tessel.list` accept additional option
`opts.authorized` for filtering seekers result.

fixes #368

lib/controller.js

@@ -26,7 +26,8 @@ Tessel.list = function(opts) {
     var seekerOpts = {
       timeout: opts.timeout * 1000,
       usb: opts.usb,
-      lan: opts.lan
+      lan: opts.lan,
+      authorized: undefined
     };
 
     // Start looking for Tessels
@@ -113,7 +114,8 @@ Tessel.get = function(opts) {
     var seekerOpts = {
       timeout: (opts.timeout || 2) * 1000,
       usb: opts.usb,
-      lan: opts.lan
+      lan: opts.lan,
+      authorized: opts.authorized || true
     };
 
     // Create a seeker object and start detecting any Tessels

lib/discover.js

@@ -16,7 +16,7 @@ util.inherits(TesselSeeker, EventEmitter);
 
 TesselSeeker.prototype.start = function(opts) {
   var self = this;
-  // Initialize the opts if it wasn't provided 
+  // Initialize the opts if it wasn't provided
   opts = opts || {};
 
   // An array of pending open connections
@@ -49,6 +49,18 @@ TesselSeeker.prototype.start = function(opts) {
   function connectionHandler(conn) {
     var tessel = new Tessel(conn);
     var opening = tessel.connection.open()
+      .then(function() {
+        if (tessel.lanConnection && opts.authorized !== undefined) {
+          if (tessel.lanConnection.authorized !== opts.authorized) {
+            debug('Kicking ' + conn.host.slice(0, -6) + ' due to authorized filter: ' + opts.authorized);
+            return Promise.reject();
+          } else {
+            return true;
+          }
+        } else {
+          return true;
+        }
+      })
       .then(function() {
         debug('Connection opened:', tessel.connection.host);
         if (conn.connectionType === 'LAN' && !conn.authorized) {
@@ -66,6 +78,8 @@ TesselSeeker.prototype.start = function(opts) {
               return Promise.resolve();
             });
         }
+      }).catch(function() {
+        return Promise.resolve();
       });
     // Push this Promise into the pending array
     pendingOpen.push(opening);