navbar now has a viewModel for each clickable function

app/src/main/java/be/ugent/sel/studeez/screens/navbar/NavigationBarViewModel.kt

@@ -1,4 +1,31 @@
 package be.ugent.sel.studeez.screens.navbar
 
-class NavigationBarViewModel {
+import be.ugent.sel.studeez.domain.AccountDAO
+import be.ugent.sel.studeez.domain.LogService
+import be.ugent.sel.studeez.navigation.StudeezDestinations
+import be.ugent.sel.studeez.screens.StudeezViewModel
+import dagger.hilt.android.lifecycle.HiltViewModel
+import javax.inject.Inject
+
+@HiltViewModel
+class NavigationBarViewModel @Inject constructor(
+    private val accountDAO: AccountDAO,
+    logService: LogService
+) : StudeezViewModel(logService) {
+
+    fun onHomeClick(openAndPopup: (String, String) -> Unit) {
+        // TODO
+    }
+
+    fun onTasksClick(openAndPopup: (String, String) -> Unit) {
+        // TODO
+    }
+
+    fun onSessionsClick(openAndPopup: (String, String) -> Unit) {
+        // TODO
+    }
+
+    fun onProfileClick(openAndPopup: (String, String) -> Unit) {
+        // TODO
+    }
 }