Added side navigation bar and header (#9)

control-panel/src/main/java/ru/dragonestia/picker/cp/page/HomePage.java

@@ -4,10 +4,9 @@ import com.vaadin.flow.component.html.H1;
 import com.vaadin.flow.component.html.Paragraph;
 import com.vaadin.flow.component.orderedlayout.VerticalLayout;
 import com.vaadin.flow.router.*;
-import ru.dragonestia.picker.api.exception.NodeNotFoundException;
 
-@Route("/")
+@Route(value = "/", layout = MainLayout.class)
-public class HomePage extends VerticalLayout implements BeforeEnterObserver {
+public class HomePage extends VerticalLayout {
 
     public HomePage() {
         super();
@@ -15,9 +14,4 @@ public class HomePage extends VerticalLayout implements BeforeEnterObserver {
         add(new H1("Hello world!"));
         add(new Paragraph("Hello world!"));
     }
-
-    @Override
-    public void beforeEnter(BeforeEnterEvent beforeEnterEvent) {
-        throw new NodeNotFoundException("gdfsg");
-    }
 }

control-panel/src/main/java/ru/dragonestia/picker/cp/page/MainLayout.java

@@ -0,0 +1,38 @@
+package ru.dragonestia.picker.cp.page;
+
+import com.vaadin.flow.component.Component;
+import com.vaadin.flow.component.Html;
+import com.vaadin.flow.component.applayout.AppLayout;
+import com.vaadin.flow.component.applayout.DrawerToggle;
+import com.vaadin.flow.component.icon.VaadinIcon;
+import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
+import com.vaadin.flow.component.orderedlayout.Scroller;
+import com.vaadin.flow.component.sidenav.SideNav;
+import com.vaadin.flow.component.sidenav.SideNavItem;
+
+public class MainLayout extends AppLayout {
+
+    public MainLayout() {
+        var toggle = new DrawerToggle();
+        var scroller = new Scroller(createSideNav());
+
+        addToDrawer(scroller);
+        addToNavbar(toggle, createLogo());
+    }
+
+    private Component createLogo() {
+        var layout = new HorizontalLayout();
+        layout.setPadding(true);
+        layout.add(new Html("<h2><u>RoomPicker!</u></h2>"));
+        return layout;
+    }
+
+    private SideNav createSideNav() {
+        var nav = new SideNav();
+        nav.addItem(new SideNavItem("Nodes list", NodesPage.class, VaadinIcon.FOLDER_O.create()));
+        nav.addItem(new SideNavItem("Search users", HomePage.class, VaadinIcon.SEARCH.create()));
+        nav.addItem(new SideNavItem("Documentation", "https://github.com/ScarletRedMan/RoomPicker", VaadinIcon.BOOK.create()));
+        nav.addItem(new SideNavItem("Sign-out", HomePage.class, VaadinIcon.SIGN_OUT.create()));
+        return nav;
+    }
+}

control-panel/src/main/java/ru/dragonestia/picker/cp/page/NodeDetailsPage.java

@@ -27,7 +27,7 @@ import java.util.List;
 @Getter
 @RequiredArgsConstructor
 @PageTitle("Rooms")
-@Route("/nodes/:nodeId")
+@Route(value = "/nodes/:nodeId", layout = MainLayout.class)
 public class NodeDetailsPage extends VerticalLayout implements BeforeEnterObserver {
 
     private final NodeRepository nodeRepository;

control-panel/src/main/java/ru/dragonestia/picker/cp/page/NodesPage.java

@@ -16,7 +16,7 @@ import ru.dragonestia.picker.cp.component.RegisterNode;
 @Log4j2
 @Getter
 @PageTitle("Nodes")
-@Route("/nodes")
+@Route(value = "/nodes", layout = MainLayout.class)
 public class NodesPage extends VerticalLayout {
 
     private final NodeRepository nodeRepository;

control-panel/src/main/java/ru/dragonestia/picker/cp/page/RoomDetailsPage.java

@@ -33,7 +33,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 @RequiredArgsConstructor
 @PageTitle("Room details")
-@Route("/nodes/:nodeId/rooms/:roomId")
+@Route(value = "/nodes/:nodeId/rooms/:roomId", layout = MainLayout.class)
 public class RoomDetailsPage extends VerticalLayout implements BeforeEnterObserver {
 
     private final NodeRepository nodeRepository;

control-panel/src/main/java/ru/dragonestia/picker/cp/page/plug/ErrorPlug.java

@@ -3,8 +3,11 @@ package ru.dragonestia.picker.cp.page.plug;
 import com.vaadin.flow.component.Html;
 import com.vaadin.flow.component.html.H1;
 import com.vaadin.flow.component.orderedlayout.VerticalLayout;
+import com.vaadin.flow.router.ParentLayout;
 import ru.dragonestia.picker.cp.component.NavPath;
+import ru.dragonestia.picker.cp.page.MainLayout;
 
+@ParentLayout(MainLayout.class)
 public abstract class ErrorPlug extends VerticalLayout {
 
     public void init(NavPath path, String title, String description) {