Теперь, обязательн надо авторизоваться, пабеда

app/src/main/java/com/example/myapplication/composeui/Cart.kt

@@ -13,6 +13,7 @@ import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
@@ -48,6 +49,7 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.res.vectorResource
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
@@ -72,6 +74,8 @@ fun Cart(
     val cartUiState = viewModel.cartUiState
     var getUser by remember { mutableStateOf(currentUserViewModel.user) }
 
+    // Проверяем, есть ли у пользователя uid
+    if (getUser?.uid != null) {
         LaunchedEffect(Unit) {
             getUser?.uid?.let { viewModel.refreshState(it) }
         }
@@ -116,6 +120,26 @@ fun Cart(
                 }
             }
         )
+    } else {
+        // Пользователь не авторизован, показываем экран с сообщением
+        UnauthorizedScreen()
+    }
+}
+
+@Composable
+fun UnauthorizedScreen() {
+    // Экран с сообщением о неудачной авторизации
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text("Oops! Something went wrong.", fontWeight = FontWeight.Bold)
+        Spacer(modifier = Modifier.height(8.dp))
+        Text("Please try again later.")
+    }
 }
 
 @OptIn(ExperimentalMaterial3Api::class)

app/src/main/java/com/example/myapplication/composeui/navigation/MainNavbar.kt

@@ -185,7 +185,7 @@ fun Navhost(
         startDestination = Screen.BikeList.route,
         modifier.padding(innerPadding)
     ) {
-        composable(Screen.BikeList.route) { BikeList(navController) }
+        composable(Screen.BikeList.route) { BikeList(navController, currentUserViewModel = currentUserViewModel) }
         composable(Screen.RentList.route) { RentList(navController, currentUserViewModel = currentUserViewModel) }
         composable(Screen.Cart.route) { Cart(currentUserViewModel = currentUserViewModel) }
         composable(Screen.UserProfile.route) { UserProfile(isDarkTheme, dataStore, currentUserViewModel = currentUserViewModel) }

app/src/main/java/com/example/myapplication/database/entities/composeui/BikeList.kt

@@ -51,8 +51,13 @@ import kotlinx.coroutines.launch
 @Composable
 fun BikeList(
     navController: NavController,
-    viewModel: BikeListViewModel = viewModel(factory = AppViewModelProvider.Factory)
+    viewModel: BikeListViewModel = viewModel(factory = AppViewModelProvider.Factory),
+    currentUserViewModel: CurrentUserViewModel = viewModel(factory = AppViewModelProvider.Factory)
 ) {
+    var getUser by remember { mutableStateOf(currentUserViewModel.user) }
+
+    // Проверяем, есть ли у пользователя uid
+    if (getUser?.uid != null) {
         val coroutineScope = rememberCoroutineScope()
         val bikePagingItems = viewModel.bikeListUiState.collectAsLazyPagingItems()
 
@@ -60,8 +65,7 @@ fun BikeList(
             topBar = {},
             floatingActionButton = {
                 Box(
-                //modifier = Modifier.fillMaxWidth(),
+                    contentAlignment = Alignment.Center
-                contentAlignment = Alignment.Center // Center align the FloatingActionButton
                 ) {
                     FloatingActionButton(
                         onClick = {
@@ -100,7 +104,11 @@ fun BikeList(
                 },
             )
         }
+    } else {
+        UnauthorizedScreen()
+    }
 }
+
 @Composable
 private fun BikeList(
     modifier: Modifier = Modifier,

app/src/main/java/com/example/myapplication/database/entities/composeui/RentList.kt

@@ -5,9 +5,12 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -26,6 +29,7 @@ import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
@@ -44,10 +48,14 @@ fun RentList(
     currentUserViewModel: CurrentUserViewModel = viewModel(factory = AppViewModelProvider.Factory)
 ) {
     var getUser by remember { mutableStateOf(currentUserViewModel.user) }
-    getUser?.uid?.let { viewModel.setUserId(it) }
+
+    // Проверяем, есть ли у пользователя uid
+    if (getUser?.uid != null) {
+        viewModel.setUserId(getUser?.uid!!)
 
         val coroutineScope = rememberCoroutineScope()
         val rentsUiState = viewModel.rentListUiState.collectAsLazyPagingItems()
+
         LazyColumn(
             modifier = Modifier
                 .fillMaxSize()
@@ -95,6 +103,25 @@ fun RentList(
                 }
             }
         }
+    } else {
+        // Пользователь не авторизован, показываем экран с сообщением
+        UnauthorizedScreen()
+    }
+}
+
+@Composable
+fun UnauthorizedScreen() {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Text("Oops! Something went wrong.", fontWeight = FontWeight.Bold)
+        Spacer(modifier = Modifier.height(8.dp))
+        Text("Please try again later.")
+    }
 }
 
 @Preview(name = "Light Mode", showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_NO)

server/data.json

@@ -79,6 +79,19 @@
           "bikeId": 2
         }
       ]
+    },
+    {
+      "id": 9,
+      "userId": 7,
+      "items": [
+        {
+          "id": 4,
+          "dateTime": 2023,
+          "frozenWeight": 26.3,
+          "count": 3,
+          "bikeId": 2
+        }
+      ]
     }
   ],
   "items": [