diff -r 61669abf277f -r e8eecee6aadf src/main/kotlin/de/uapcore/lightpit/viewmodel/NavMenus.kt
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/kotlin/de/uapcore/lightpit/viewmodel/NavMenus.kt	Fri Apr 02 11:59:14 2021 +0200
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2021 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package de.uapcore.lightpit.viewmodel
+
+import de.uapcore.lightpit.entities.Component
+import de.uapcore.lightpit.entities.Project
+import de.uapcore.lightpit.entities.Version
+
+class NavMenuEntry(
+    val level: Int,
+    val caption: String,
+    val href: String,
+    val title: String = "",
+    val active: Boolean = false,
+    val resolveCaption: Boolean = false,
+    val iconColor: String? = null
+) {
+    val iconUseCssClass = iconColor != null && !iconColor.startsWith("#")
+}
+
+class NavMenu(val entries: List<NavMenuEntry>)
+
+fun projectNavMenu(
+    projects: List<Project>,
+    versions: List<Version> = emptyList(),
+    components: List<Component> = emptyList(),
+    selectedProject: Project? = null,
+    selectedVersion: Version? = null,
+    selectedComponent: Component? = null
+) = NavMenu(
+    sequence {
+        val cnode = selectedComponent?.node ?: "-"
+        val vnode = selectedVersion?.node ?: "-"
+        for (project in projects) {
+            val active = project == selectedProject
+            yield(
+                NavMenuEntry(
+                    level = 0,
+                    caption = project.name,
+                    href = "projects/${project.node}",
+                    active = active
+                )
+            )
+            if (active) {
+                yield(
+                    NavMenuEntry(
+                        level = 1,
+                        caption = "navmenu.versions",
+                        resolveCaption = true,
+                        href = "projects/${project.node}/versions/"
+                    )
+                )
+                yield(
+                    NavMenuEntry(
+                        level = 2,
+                        caption = "navmenu.all",
+                        resolveCaption = true,
+                        href = "projects/${project.node}/issues/-/${cnode}/",
+                        iconColor = "#000000"
+                    )
+                )
+                for (version in versions) {
+                    yield(
+                        NavMenuEntry(
+                            level = 2,
+                            caption = version.name,
+                            title = "version.status.${version.status}",
+                            href = "projects/${project.node}/issues/${version.node}/${cnode}/",
+                            iconColor = "version-${version.status}",
+                            active = version == selectedVersion
+                        )
+                    )
+                }
+                yield(
+                    NavMenuEntry(
+                        level = 1,
+                        caption = "navmenu.components",
+                        resolveCaption = true,
+                        href = "projects/${project.node}/components/"
+                    )
+                )
+                yield(
+                    NavMenuEntry(
+                        level = 2,
+                        caption = "navmenu.all",
+                        resolveCaption = true,
+                        href = "projects/${project.node}/issues/${vnode}/-/",
+                        iconColor = "#000000"
+                    )
+                )
+                for (component in components) {
+                    yield(
+                        NavMenuEntry(
+                            level = 2,
+                            caption = component.name,
+                            href = "projects/${project.node}/issues/${vnode}/${component.node}/",
+                            iconColor = "${component.color}",
+                            active = component == selectedComponent
+                        )
+                    )
+                }
+            }
+        }
+    }.toList()
+)