Сделал ошибку для регистраций и авторизаций, победа

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

@@ -32,6 +32,7 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.BasicTextField
+import androidx.compose.material.AlertDialog
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Warning
 import androidx.compose.material3.Button
@@ -39,9 +40,11 @@ import androidx.compose.material3.Card
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Snackbar
 import androidx.compose.material3.Switch
 import androidx.compose.material3.SwitchDefaults
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.getValue
@@ -89,6 +92,8 @@ fun UserProfile(
 ) {
     val context = LocalContext.current
 
+    var errorState by remember { mutableStateOf<String?>(null) }
+
     var username by remember { mutableStateOf("") }
     var password by remember { mutableStateOf("") }
     var isRegistration by remember { mutableStateOf(false) }
@@ -162,13 +167,15 @@ fun UserProfile(
                         Button(
                             onClick = {
                                 coroutineScope.launch {
-                                    val registrationSuccessful =
-                                        registerUserViewModel.registerUser(username, password)
+                                    val registrationSuccessful = registerUserViewModel.registerUser(username, password)
                                     if (registrationSuccessful) {
                                         navController?.navigate(Screen.LoginScreen.route)
                                     } else {
-                                        Log.d("User already exists.", "Registration failed.")
+                                        Log.d("Регистрация","Ошибка")
+                                        // При других ошибках регистрации выводим сообщение
+                                        errorState = "Пользователь с таким логином уже существует"
                                     }
+
                                 }
                             },
                             modifier = Modifier
@@ -177,6 +184,7 @@ fun UserProfile(
                         ) {
                             Text("Регистрация")
                         }
+
                         Text(
                             text = "Войти",
                             modifier = Modifier
@@ -194,7 +202,8 @@ fun UserProfile(
                                     currentUserViewModel.setArgument(user.uid.toString())
                                     navController?.navigate(Screen.LoginScreen.route)
                                 } else {
-                                    Log.d("Авторизация", "Пароль не совпадает")
+                                    // При ошибке авторизации выводим сообщение
+                                    errorState = "Ошибка авторизации: неверный логин или пароль"
                                 }
                             },
                             modifier = Modifier
@@ -203,6 +212,7 @@ fun UserProfile(
                         ) {
                             Text("Вход")
                         }
+
                         Text(
                             text = "Зарегистрироваться",
                             modifier = Modifier
@@ -213,6 +223,28 @@ fun UserProfile(
                             color = MaterialTheme.colorScheme.onSurface
                         )
                     }
+                    errorState?.let { errorMessage ->
+                        AlertDialog(
+                            onDismissRequest = { errorState = null },
+                            title = { Text(text = "Ошибка") },
+                            text = { Text(errorMessage, color = MaterialTheme.colorScheme.onBackground) },
+                            buttons = {
+                                Row(
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .padding(8.dp),
+                                    horizontalArrangement = Arrangement.End
+                                ) {
+                                    TextButton(onClick = { errorState = null }) {
+                                        Text("Закрыть", color = MaterialTheme.colorScheme.onBackground)
+                                    }
+                                }
+                            },
+                            modifier = Modifier.padding(16.dp),
+                            backgroundColor = MaterialTheme.colorScheme.background,
+                            contentColor = MaterialTheme.colorScheme.onBackground
+                        )
+                    }
                     val switchColors = SwitchDefaults.colors(
                         checkedThumbColor = MaterialTheme.colorScheme.primary, // Change the color when the switch is checked
                         checkedTrackColor = MaterialTheme.colorScheme.secondary,  // Change the color of the track when the switch is checked

server/data.json

@@ -120,6 +120,12 @@
       "login": "привет 2",
       "role": "user",
       "password": "привет 2"
+    },
+    {
+      "id": 18,
+      "login": "q2",
+      "role": "user",
+      "password": "q"
     }
   ],
   "rents": [