replace minTs with timeSpan (in secs) in /v1/notifications

lib/expressapp.js

@@ -439,8 +439,9 @@ ExpressApp.prototype.start = function(opts, cb) {
 
   router.get('/v1/notifications/', function(req, res) {
     getServerWithAuth(req, res, function(server) {
+      var timeSpan = req.query.timeSpan ? Math.min(+req.query.timeSpan || 0, 60) : 60;
       var opts = {
-        minTs: Math.max(+req.query.minTs || 0, +Date.now() - (60 * 1000)),
+        minTs: +Date.now() - (timeSpan * 1000),
         notificationId: req.query.notificationId,
       };
       server.getNotifications(opts, function(err, notifications) {

test/expressapp.js

@@ -127,7 +127,7 @@ describe('ExpressApp', function() {
         it('should allow custom minTs within limits', function(done) {
           start(TestExpressApp, function() {
             var requestOptions = {
-              url: testHost + ':' + testPort + config.basePath + '/v1/notifications' + '?minTs=' + (Date.now() - 30000),
+              url: testHost + ':' + testPort + config.basePath + '/v1/notifications' + '?timeSpan=30',
               headers: {
                 'x-identity': 'identity',
                 'x-signature': 'signature'
@@ -147,7 +147,7 @@ describe('ExpressApp', function() {
         it('should limit minTs to 60 seconds', function(done) {
           start(TestExpressApp, function() {
             var requestOptions = {
-              url: testHost + ':' + testPort + config.basePath + '/v1/notifications' + '?minTs=' + (Date.now() - 90000),
+              url: testHost + ':' + testPort + config.basePath + '/v1/notifications' + '?timeSpan=90',
               headers: {
                 'x-identity': 'identity',
                 'x-signature': 'signature'