app/src/main/java/ru/myitschool/work/core/TestIds.kt

@@ -6,6 +6,7 @@ object TestIds {
         const val SIGN_BUTTON = "auth_sign_button"
         const val CODE_INPUT = "auth_code_input"
     }
+
     object Main {
         const val ERROR = "main_error"
         const val ADD_BUTTON = "main_add_button"

app/src/main/java/ru/myitschool/work/data/repo/AuthRepository.kt

@@ -1,5 +1,6 @@
 package ru.myitschool.work.data.repo
 
+import android.util.Log
 import ru.myitschool.work.data.source.NetworkDataSource
 
 object AuthRepository {

app/src/main/java/ru/myitschool/work/ui/root/RootActivity.kt

@@ -15,6 +15,7 @@ class RootActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
+        actionBar?.hide()
         setContent {
             WorkTheme {
                 Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->

app/src/main/java/ru/myitschool/work/ui/screen/NavigationGraph.kt

@@ -35,14 +35,14 @@ fun AppNavHost(
             Box(
                 contentAlignment = Alignment.Center
             ) {
-                Text(text = "Hello")
+                Text(text = "MAIN")
             }
         }
         composable<BookScreenDestination> {
             Box(
                 contentAlignment = Alignment.Center
             ) {
-                Text(text = "Hello")
+                Text(text = "BOOK")
             }
         }
     }

app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthScreen.kt

@@ -1,5 +1,6 @@
 package ru.myitschool.work.ui.screen.auth
 
+import android.util.Log
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Spacer
@@ -10,6 +11,7 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.material3.Button
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextField
 import androidx.compose.runtime.Composable
@@ -22,6 +24,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.layout.onGloballyPositioned
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
@@ -54,16 +57,16 @@ fun AuthScreen(
     ) {
         Text(
             text = stringResource(R.string.auth_title),
-            style = MaterialTheme.typography.headlineSmall,
+            style = MaterialTheme.typography.headlineMedium,
             textAlign = TextAlign.Center
         )
         when (val currentState = state) {
-            is AuthState.Data -> Content(viewModel, currentState)
             is AuthState.Loading -> {
                 CircularProgressIndicator(
                     modifier = Modifier.size(64.dp)
                 )
             }
+            else -> Content(viewModel, currentState)
         }
     }
 }
@@ -71,11 +74,14 @@ fun AuthScreen(
 @Composable
 private fun Content(
     viewModel: AuthViewModel,
-    state: AuthState.Data
+    state: AuthState,
 ) {
     var inputText by remember { mutableStateOf("") }
+    val err by viewModel.errorFlow.collectAsState()
+    val isButtonEnabled by viewModel.isButtonEnabled.collectAsState()
+
     Spacer(modifier = Modifier.size(16.dp))
-    TextField(
+    OutlinedTextField(
         modifier = Modifier.testTag(TestIds.Auth.CODE_INPUT).fillMaxWidth(),
         value = inputText,
         onValueChange = {
@@ -85,12 +91,22 @@ private fun Content(
         label = { Text(stringResource(R.string.auth_label)) }
     )
     Spacer(modifier = Modifier.size(16.dp))
+    if (state == AuthState.Error) {
+        Text(
+            text = err,
+            color = MaterialTheme.colorScheme.error,
+            modifier = Modifier.testTag(TestIds.Auth.ERROR)
+        )
+        Spacer(modifier = Modifier.size(16.dp))
+    }
     Button(
-        modifier = Modifier.testTag(TestIds.Auth.SIGN_BUTTON).fillMaxWidth(),
+        modifier = Modifier
+            .testTag(TestIds.Auth.SIGN_BUTTON)
+            .fillMaxWidth(),
         onClick = {
             viewModel.onIntent(AuthIntent.Send(inputText))
         },
-        enabled = true
+        enabled = isButtonEnabled
     ) {
         Text(stringResource(R.string.auth_sign_in))
     }

app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthState.kt

@@ -3,4 +3,6 @@ package ru.myitschool.work.ui.screen.auth
 sealed interface AuthState {
     object Loading: AuthState
     object Data: AuthState
+
+    object Error: AuthState
 }

app/src/main/java/ru/myitschool/work/ui/screen/auth/AuthViewModel.kt

@@ -1,5 +1,6 @@
 package ru.myitschool.work.ui.screen.auth
 
+import android.util.Log
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.Dispatchers
@@ -18,26 +19,40 @@ class AuthViewModel : ViewModel() {
     private val _uiState = MutableStateFlow<AuthState>(AuthState.Data)
     val uiState: StateFlow<AuthState> = _uiState.asStateFlow()
 
+    private val _errorFlow = MutableStateFlow<String>("")
+    val errorFlow: StateFlow<String> = _errorFlow.asStateFlow()
+
+    private val _isButtonEnabled = MutableStateFlow<Boolean>(false)
+    val isButtonEnabled: StateFlow<Boolean> = _isButtonEnabled.asStateFlow()
+
     private val _actionFlow: MutableSharedFlow<Unit> = MutableSharedFlow()
     val actionFlow: SharedFlow<Unit> = _actionFlow
 
     fun onIntent(intent: AuthIntent) {
         when (intent) {
             is AuthIntent.Send -> {
+                onIntent(AuthIntent.TextInput(""))
                 viewModelScope.launch(Dispatchers.Default) {
                     _uiState.update { AuthState.Loading }
-                    checkAndSaveAuthCodeUseCase.invoke("9999").fold(
+                    checkAndSaveAuthCodeUseCase.invoke(intent.text).fold(
                         onSuccess = {
                             _actionFlow.emit(Unit)
                         },
                         onFailure = { error ->
                             error.printStackTrace()
-                            _actionFlow.emit(Unit)
+                            _errorFlow.update { error.message.toString() }
+                            _uiState.update { AuthState.Error }
                         }
                     )
                 }
             }
-            is AuthIntent.TextInput -> Unit
+
+            is AuthIntent.TextInput -> {
+                if (_uiState.value == AuthState.Error) _uiState.update { AuthState.Data }
+                if (intent.text.matches("[a-zA-Z0-9]{4}".toRegex())) {
+                    _isButtonEnabled.update { true }
+                } else _isButtonEnabled.update { false }
+            }
         }
     }
 }

app/src/main/java/ru/myitschool/work/ui/theme/Theme.kt

@@ -52,6 +52,6 @@ fun WorkTheme(
     MaterialTheme(
         colorScheme = colorScheme,
         typography = Typography,
-        content = content
+        content = content,
     )
 }