UI (#15)

Adding new Admin UI. Updating Fredy to V3.0.0 as it has been a large rewrite. Thanks for all contributions and help on the way!

ui/src/components/menu/Menu.js

@@ -0,0 +1,39 @@
+import React from 'react';
+import { useHistory } from 'react-router-dom';
+import { Menu } from 'semantic-ui-react';
+
+import './Menu.less';
+import { useLocation } from 'react-router';
+
+const TopMenu = function TopMenu({ isAdmin }) {
+  const history = useHistory();
+  const location = useLocation();
+
+  const isActiveRoute = (name) => location.pathname.indexOf(name) !== -1;
+
+  return (
+    <Menu pointing secondary className="topMenu">
+      <Menu.Item
+        name="jobs"
+        active={isActiveRoute('jobs')}
+        className={isActiveRoute('jobs') ? 'topMenu__active' : 'topMenu__item'}
+        onClick={() => history.push('/jobs')}
+      >
+        Job Configuration
+      </Menu.Item>
+
+      {isAdmin && (
+        <Menu.Item
+          name="user"
+          active={isActiveRoute('users')}
+          className={isActiveRoute('users') ? 'topMenu__active' : 'topMenu__item'}
+          onClick={() => history.push('/users')}
+        >
+          User configuration
+        </Menu.Item>
+      )}
+    </Menu>
+  );
+};
+
+export default TopMenu;