implemented storage of tunnel tokens

lib/app.js

@@ -171,7 +171,7 @@ module.exports = function (myDeps, conf, overrideHttp) {
             }).then(function (result) {
               console.log('got a token from the tunnel server?');
               result.owner = session.id;
-              deps.tunneler.add(result);
+              return deps.tunneler.add(result);
             });
           /*
           });

lib/tunnel-manager.js

@@ -1,9 +1,38 @@
 'use strict';
 
 module.exports.create = function (deps, config) {
+  var PromiseA = require('bluebird');
+  var fs = PromiseA.promisifyAll(require('fs'));
   var stunnel = require('stunnel');
   var activeTunnels = {};
 
+  var tokensPath = require('path').join(__dirname, '..', 'var', 'tokens.json');
+  var storage = {
+    all: function () {
+      var tokens;
+      try {
+        tokens = require(tokensPath);
+      } catch (err) {
+        tokens = {};
+      }
+
+      return PromiseA.resolve(Object.keys(tokens).map(function (key) {
+        return tokens[key];
+      }));
+    }
+  , save: function (result) {
+      var tokens;
+      try {
+        tokens = require(tokensPath);
+      } catch (err) {
+        tokens = {};
+      }
+
+      tokens[result.jwt] = result;
+      return fs.writeFileAsync(tokensPath, JSON.stringify(tokens), 'utf8');
+    }
+  };
+
   function addToken(data) {
     if (!data.tunnelUrl) {
       var decoded;
@@ -11,11 +40,12 @@ module.exports.create = function (deps, config) {
         decoded = JSON.parse(new Buffer(data.jwt.split('.')[1], 'base64').toString('ascii'));
       } catch (err) {
         console.warn('invalid web token given to tunnel manager', err);
-        return;
+        return PromiseA.reject(err);
       }
       if (!decoded.aud) {
         console.warn('tunnel manager given token with no tunnelUrl or audience');
-        return;
+        var err = new Error('missing tunnelUrl and audience');
+        return PromiseA.reject(err);
       }
       data.tunnelUrl = 'wss://' + decoded.aud + '/';
     }
@@ -50,8 +80,17 @@ module.exports.create = function (deps, config) {
       addToken({ jwt: jwt, owner: 'config' });
     });
   }
+  storage.all().then(function (stored) {
+    stored.forEach(function (result) {
+      addToken(result);
+    });
+  });
 
   return {
-    add: addToken
+    add: function (data) {
+      return addToken(data).then(function () {
+        return storage.save(data);
+      });
+    }
   };
 };