updates root components structure

scm-ui/src/components/navigation/PrimaryNavigationLink.js

@@ -0,0 +1,29 @@
+//@flow
+import * as React from "react";
+import { Route, Link } from "react-router-dom";
+
+type Props = {
+  to: string,
+  label: string,
+  activeOnlyWhenExact?: boolean
+};
+
+class PrimaryNavigationLink extends React.Component<Props> {
+  renderLink = (route: any) => {
+    const { to, label } = this.props;
+    return (
+      <li className={route.match ? "is-active" : ""}>
+        <Link to={to}>{label}</Link>
+      </li>
+    );
+  };
+
+  render() {
+    const { to, activeOnlyWhenExact } = this.props;
+    return (
+      <Route path={to} exact={activeOnlyWhenExact} children={this.renderLink} />
+    );
+  }
+}
+
+export default PrimaryNavigationLink;