Better redirections while logged in

* If the user is already logged in and tries to go to /users/login,
redirect him to the default page
* Add check on the /users/edit page, it was not secure

src/public/js/app.js

@@ -81,8 +81,8 @@ export function startPollingTorrents() {
   )
 }
 
-var pollingTorrentsId;
+// This function returns true if the user is logged in, false otherwise
-const loginCheck = function(nextState, replace, next, f) {
+function isLoggedIn() {
   const state = store.getState();
   const isLogged = state.userStore.isLogged;
   let token = localStorage.getItem('token');
@@ -98,10 +98,23 @@ const loginCheck = function(nextState, replace, next, f) {
     });
   }
 
-  if (!isLogged && (!token || token === "")) {
+  if (isLogged || (token && token !== "")) {
+    return true
+  }
+
+  return false
+}
+
+var pollingTorrentsId;
+const loginCheck = function(nextState, replace, next, f = null) {
+  const loggedIn = isLoggedIn();
+  if (!loggedIn) {
       replace('/users/login');
   } else {
+    if (f) {
       f();
+    }
+
     // Poll torrents once logged
     if (!pollingTorrentsId) {
       // Fetch the torrents every 10s
@@ -114,15 +127,34 @@ const loginCheck = function(nextState, replace, next, f) {
   next();
 }
 
+const defaultRoute = '/movies/explore/yts/seeds';
 const routes = {
   path: '/',
   component: App,
-  indexRoute: {onEnter: ({params}, replace) => replace('/movies/explore/yts/seeds')},
+  indexRoute: {onEnter: ({params}, replace) => replace(defaultRoute)},
   childRoutes: [
-    { path: '/users/login'                      , component: UserLoginForm                            },
+    {
-    { path: '/users/signup'                     , component: UserSignUp                               },
+      path: '/users/signup',
-    { path: '/users/edit'                       , component: UserEdit                                 },
+      component: UserSignUp
-    { path: '/users/signup'                     , component: UserSignUp                               },
+    },
+    {
+      path: '/users/login',
+      component: UserLoginForm,
+      onEnter: function(nextState, replace, next) {
+        if (isLoggedIn()) {
+          // User is already logged in, redirect him to the default route
+          replace(defaultRoute);
+        }
+        next();
+      },
+    },
+    {
+      path: '/users/edit',
+      component: UserEdit,
+      onEnter: function(nextState, replace, next) {
+        loginCheck(nextState, replace, next);
+      },
+    },
     {
       path: '/users/logout',
       onEnter: function(nextState, replace, next) {