fix

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

@@ -0,0 +1,38 @@
+package ru.myitschool.work.auth.data
+
+import ru.myitschool.work.core.MyResult
+import ru.myitschool.work.core.NetworkDataSource
+import ru.myitschool.work.util.DataStoreManager
+
+object AuthRepository {
+
+    suspend fun checkAndSaveCode(code: String): MyResult<Unit> {
+        return when (val result = NetworkDataSource.checkAuth(code)) {
+            is MyResult.Success -> {
+                if (result.data) {
+                    DataStoreManager.saveAuthCode(code)
+                    MyResult.Success(Unit)
+                } else {
+                    MyResult.Error("Неверный код")
+                }
+            }
+            is MyResult.Error -> result
+        }
+        /*DataStoreManager.saveAuthCode(code)
+        return MyResult.Success(Unit)*/
+    }
+    suspend fun logOut(): MyResult<Unit> {
+        return try {
+            DataStoreManager.clearAuthCode()
+            MyResult.Success(Unit)
+        } catch (e: Exception) {
+            MyResult.Error("Ошибка при выходе")
+        }
+    }
+
+    suspend fun checkCode(code: String): MyResult<Boolean> =
+        NetworkDataSource.checkAuth(code)
+
+    suspend fun getSavedCode(): String? =
+        DataStoreManager.getAuthCode()
+}

app/src/main/java/ru/myitschool/work/auth/domain/CheckAndSaveAuthCodeUseCase.kt

@@ -0,0 +1,12 @@
+package ru.myitschool.work.auth.domain
+
+import ru.myitschool.work.auth.data.AuthRepository
+import ru.myitschool.work.core.MyResult
+
+class CheckAndSaveAuthCodeUseCase(
+    private val repository: AuthRepository,
+) {
+    suspend operator fun invoke(code: String): MyResult<Unit> {
+        return repository.checkAndSaveCode(code)
+    }
+}

app/src/main/java/ru/myitschool/work/auth/domain/LogOutUseCase.kt

@@ -0,0 +1,10 @@
+package ru.myitschool.work.auth.domain
+
+import ru.myitschool.work.auth.data.AuthRepository
+import ru.myitschool.work.core.MyResult
+
+class LogOutUseCase(private val repository: AuthRepository) {
+    suspend operator fun invoke(): MyResult<Unit>{
+        return repository.logOut()
+    }
+}

app/src/main/java/ru/myitschool/work/auth/presentation/AuthIntent.kt

@@ -0,0 +1,6 @@
+package ru.myitschool.work.auth.presentation
+
+sealed interface AuthIntent {
+    data object Send: AuthIntent
+    data class TextInput(val text: String): AuthIntent
+}

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

@@ -0,0 +1,97 @@
+package ru.myitschool.work.auth.presentation
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+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.material3.Button
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextField
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavController
+import ru.myitschool.work.R
+import ru.myitschool.work.core.TestIds
+import ru.myitschool.work.ui.Screen
+
+@Composable
+fun AuthScreen(
+    viewModel: AuthViewModel = viewModel(),
+    navController: NavController
+) {
+    val state by viewModel.uiState.collectAsState()
+
+    LaunchedEffect(state.isAuthenticated) {
+        if (state.isAuthenticated) {
+            navController.navigate(Screen.Main) {
+                popUpTo(navController.graph.startDestinationId) { inclusive = true }
+                launchSingleTop = true
+            }
+        }
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(24.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+    ) {
+        if (state.isLoading){
+            CircularProgressIndicator(
+                modifier = Modifier.size(64.dp)
+            )
+        } else {
+            Text(
+                text = stringResource(R.string.auth_title),
+                style = MaterialTheme.typography.headlineSmall,
+                textAlign = TextAlign.Center
+            )
+
+            Spacer(Modifier.height(15.dp))
+
+            TextField(
+                modifier = Modifier.testTag(TestIds.Auth.CODE_INPUT).fillMaxWidth(),
+                value = state.code,
+                onValueChange = {
+                    viewModel.onIntent(AuthIntent.TextInput(it))
+                },
+                label = { Text(stringResource(R.string.auth_label)) }
+            )
+
+            Text(
+                text = state.error?: "",
+                modifier = Modifier.testTag(TestIds.Auth.ERROR),
+                color = MaterialTheme.colorScheme.error)
+
+
+
+            Button(
+                modifier = Modifier.testTag(TestIds.Auth.SIGN_BUTTON).fillMaxWidth(),
+                onClick = {
+                    viewModel.onIntent(AuthIntent.Send)
+                },
+                enabled = state.isButtonEnabled
+            ) {
+                Text(stringResource(R.string.auth_sign_in))
+            }
+        }
+
+    }
+
+}

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

@@ -0,0 +1,9 @@
+package ru.myitschool.work.auth.presentation
+
+data class AuthState(
+    val code: String = "",
+    val error: String? = null,
+    val isLoading: Boolean = false,
+    val isAuthenticated: Boolean = false,
+    val isButtonEnabled: Boolean = false
+)

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

@@ -0,0 +1,66 @@
+package ru.myitschool.work.auth.presentation
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import ru.myitschool.work.auth.data.AuthRepository
+import ru.myitschool.work.core.MyResult
+import ru.myitschool.work.auth.domain.CheckAndSaveAuthCodeUseCase
+
+class AuthViewModel : ViewModel() {
+    private val checkAndSaveAuthCodeUseCase by lazy { CheckAndSaveAuthCodeUseCase(AuthRepository) }
+    private val _uiState = MutableStateFlow<AuthState>(AuthState())
+    val uiState: StateFlow<AuthState> = _uiState.asStateFlow()
+
+    fun onIntent(intent: AuthIntent) {
+        when (intent) {
+            AuthIntent.Send -> sendCode()
+            is AuthIntent.TextInput -> updateCode(intent.text)
+        }
+    }
+
+
+    private fun updateCode(newCode: String) {
+        val trimmed = newCode.trim()
+        val isValid = trimmed.length == 4 && trimmed.matches(Regex("^[a-zA-Z0-9]{4}$"))
+
+        _uiState.update {
+            it.copy(
+                code = trimmed,
+                isButtonEnabled = isValid,
+                error = null
+            )
+        }
+    }
+
+    private fun sendCode() {
+        val currentCode = _uiState.value.code
+        if (currentCode.length != 4 || !currentCode.matches(Regex("^[a-zA-Z0-9]{4}$"))) return
+
+        viewModelScope.launch {
+            _uiState.update { it.copy(isLoading = true, error = null) }
+
+            when (val result = checkAndSaveAuthCodeUseCase(currentCode)){
+                is MyResult.Success -> {
+                    _uiState.update {
+                        it.copy(isLoading = false, isAuthenticated = true)
+                    }
+                }
+
+                is MyResult.Error -> {
+                    _uiState.update {
+                        it.copy(
+                            isLoading = false,
+                            error = result.error,
+                            isAuthenticated = false
+                        )
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/ru/myitschool/work/booking/data/AvailableBookingResponse.kt

@@ -0,0 +1,11 @@
+package ru.myitschool.work.booking.data
+
+import kotlinx.serialization.Serializable
+
+typealias AvailableBookingResponse = Map<String, List<AvailablePlace>>
+
+@Serializable
+data class AvailablePlace(
+    val id: Int,
+    val place: String
+)

app/src/main/java/ru/myitschool/work/booking/data/BookRequest.kt

@@ -0,0 +1,9 @@
+package ru.myitschool.work.booking.data
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class BookRequest(
+    val date: String,
+    val placeID: Int
+)

app/src/main/java/ru/myitschool/work/booking/data/BookingRepository.kt

@@ -0,0 +1,25 @@
+package ru.myitschool.work.booking.data
+
+import ru.myitschool.work.booking.domain.BookingData
+import ru.myitschool.work.core.MyResult
+import ru.myitschool.work.core.NetworkDataSource
+
+object BookingRepository {
+    suspend fun getAvailableForBooking(code: String): MyResult<BookingData> {
+        return when (val result = NetworkDataSource.getAvailableForBooking(code)) {
+            is MyResult.Success -> {
+                val bookingData = BookingData(
+                    dateToPlaces = result.data
+                )
+                MyResult.Success(bookingData)
+            }
+            is MyResult.Error -> {
+                MyResult.Error(result.error)
+            }
+        }
+    }
+
+    suspend fun createBooking(code: String, date: String, placeId: Int): MyResult<Unit> {
+        return NetworkDataSource.createBooking(code, date, placeId)
+    }
+}

app/src/main/java/ru/myitschool/work/booking/domain/BookingData.kt

@@ -0,0 +1,7 @@
+package ru.myitschool.work.booking.domain
+
+import ru.myitschool.work.booking.data.AvailablePlace
+
+data class BookingData(
+    val dateToPlaces: Map<String, List<AvailablePlace>>
+)

app/src/main/java/ru/myitschool/work/booking/domain/CreateBookingUseCase.kt

@@ -0,0 +1,12 @@
+package ru.myitschool.work.booking.domain
+
+import ru.myitschool.work.booking.data.BookingRepository
+import ru.myitschool.work.core.MyResult
+
+class CreateBookingUseCase(
+    private val repository: BookingRepository
+) {
+    suspend operator fun invoke(code: String, date: String, placeId: Int): MyResult<Unit> {
+        return repository.createBooking(code, date, placeId)
+    }
+}

app/src/main/java/ru/myitschool/work/booking/domain/GetAvailableUseCase.kt

@@ -0,0 +1,12 @@
+package ru.myitschool.work.booking.domain
+
+import ru.myitschool.work.booking.data.BookingRepository
+import ru.myitschool.work.core.MyResult
+
+class GetAvailableUseCase(
+    private val repository: BookingRepository
+) {
+    suspend operator fun invoke(code: String): MyResult<BookingData> {
+        return repository.getAvailableForBooking(code)
+    }
+}

app/src/main/java/ru/myitschool/work/booking/presentation/BookingIntent.kt

@@ -0,0 +1,9 @@
+package ru.myitschool.work.booking.presentation
+
+sealed interface BookingIntent {
+    object LoadData: BookingIntent
+    data class SelectDate(val date: String): BookingIntent
+    data class SelectPlace(val placeId: Int): BookingIntent
+    object Book: BookingIntent
+    object Refresh: BookingIntent
+}

app/src/main/java/ru/myitschool/work/booking/presentation/BookingScreen.kt

@@ -0,0 +1,213 @@
+package ru.myitschool.work.booking.presentation
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.selection.selectable
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import ru.myitschool.work.core.TestIds
+import java.text.SimpleDateFormat
+import java.util.Locale
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun BookingScreen(
+    onNavigateBack: () -> Unit,
+    onBookingSuccess: () -> Unit,
+    viewModel: BookingViewModel = viewModel()
+) {
+    val state by viewModel.state.collectAsState()
+
+    LaunchedEffect(state.bookingSuccess) {
+        if (state.bookingSuccess) {
+            onBookingSuccess()
+        }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Бронирование") },
+                navigationIcon = {
+                    IconButton(
+                        onClick = onNavigateBack,
+                        modifier = Modifier.testTag(TestIds.Book.BACK_BUTTON)
+                    ) {
+                        Text("<")
+                    }
+                }
+            )
+        }
+    ) { paddingValues ->
+        Box(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(paddingValues)
+        ) {
+            when {
+                state.isLoading -> {
+                    CircularProgressIndicator(
+                        modifier = Modifier.align(Alignment.Center)
+                    )
+                }
+                state.error != null -> {
+                    ErrorContent(
+                        error = state.error!!,
+                        onRefresh = { viewModel.onIntent(BookingIntent.Refresh) }
+                    )
+                }
+                state.dates.isEmpty() -> {
+                    EmptyContent(onNavigateBack = onNavigateBack)
+                }
+                else -> {
+                    BookingContent(
+                        state = state,
+                        onIntent = { viewModel.onIntent(it) }
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun ErrorContent(
+    error: String,
+    onRefresh: () -> Unit
+) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(
+            text = error,
+            modifier = Modifier.testTag(TestIds.Book.ERROR)
+        )
+        Spacer(modifier = Modifier.height(16.dp))
+        Button(
+            onClick = onRefresh,
+            modifier = Modifier.testTag(TestIds.Book.REFRESH_BUTTON)
+        ) {
+            Text("Обновить")
+        }
+    }
+}
+
+@Composable
+private fun EmptyContent(onNavigateBack: () -> Unit) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(
+            text = "Всё забронировано",
+            modifier = Modifier.testTag(TestIds.Book.EMPTY)
+        )
+        Spacer(modifier = Modifier.height(16.dp))
+        Button(
+            onClick = onNavigateBack,
+            modifier = Modifier.testTag(TestIds.Book.BACK_BUTTON)
+        ) {
+            Text("Назад")
+        }
+    }
+}
+
+@Composable
+private fun BookingContent(
+    state: BookingState,
+    onIntent: (BookingIntent) -> Unit
+) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+    ) {
+        TabRow(
+            selectedTabIndex = state.dates.indexOf(state.selectedDate),
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            state.dates.forEachIndexed { index, date ->
+                Tab(
+                    selected = date == state.selectedDate,
+                    onClick = { onIntent(BookingIntent.SelectDate(date)) },
+                    modifier = Modifier.testTag(TestIds.Book.getIdDateItemByPosition(index))
+                ) {
+                    Text(
+                        text = formatDateForDisplay(date),
+                        modifier = Modifier
+                            .testTag(TestIds.Book.ITEM_DATE)
+                            .padding(16.dp)
+                    )
+                }
+            }
+        }
+
+        Column(
+            modifier = Modifier
+                .weight(1f)
+                .verticalScroll(rememberScrollState())
+                .padding(16.dp)
+        ) {
+            state.availablePlaces.forEachIndexed { index, place ->
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .testTag(TestIds.Book.getIdPlaceItemByPosition(index))
+                        .selectable(
+                            selected = place.id == state.selectedPlaceId,
+                            onClick = { onIntent(BookingIntent.SelectPlace(place.id)) }
+                        )
+                        .padding(vertical = 8.dp),
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    RadioButton(
+                        selected = place.id == state.selectedPlaceId,
+                        onClick = { onIntent(BookingIntent.SelectPlace(place.id)) },
+                        modifier = Modifier.testTag(TestIds.Book.ITEM_PLACE_SELECTOR)
+                    )
+                    Spacer(modifier = Modifier.width(8.dp))
+                    Text(
+                        text = place.place,
+                        modifier = Modifier.testTag(TestIds.Book.ITEM_PLACE_TEXT)
+                    )
+                }
+            }
+        }
+
+        Button(
+            onClick = { onIntent(BookingIntent.Book) },
+            enabled = state.selectedPlaceId != null && !state.isBookingInProgress,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+                .testTag(TestIds.Book.BOOK_BUTTON)
+        ) {
+            Text(
+                text = if (state.isBookingInProgress) "Бронирование..." else "Забронировать"
+            )
+        }
+    }
+}
+
+private fun formatDateForDisplay(isoDate: String): String {
+    return try {
+        val inputFormat = SimpleDateFormat("yyyy-MM-dd")
+        val outputFormat = SimpleDateFormat("dd.MM")
+        val date = inputFormat.parse(isoDate)
+        date?.let { outputFormat.format(it) } ?: isoDate
+    } catch (e: Exception) {
+        isoDate
+    }
+}

app/src/main/java/ru/myitschool/work/booking/presentation/BookingState.kt

@@ -0,0 +1,15 @@
+package ru.myitschool.work.booking.presentation
+
+import ru.myitschool.work.booking.data.AvailablePlace
+
+data class BookingState(
+    val isLoading: Boolean = true,
+    val error: String? = null,
+    val dates: List<String> = emptyList(),
+    val dateToPlacesMap: Map<String, List<AvailablePlace>> = emptyMap(),
+    val selectedDate: String? = null,
+    val availablePlaces: List<AvailablePlace> = emptyList(),
+    val selectedPlaceId: Int? = null,
+    val isBookingInProgress: Boolean = false,
+    val bookingSuccess: Boolean = false
+)

app/src/main/java/ru/myitschool/work/booking/presentation/BookingViewModel.kt

@@ -0,0 +1,142 @@
+package ru.myitschool.work.booking.presentation
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import ru.myitschool.work.booking.data.BookingRepository
+import ru.myitschool.work.core.MyResult
+import ru.myitschool.work.util.DataStoreManager
+import java.text.SimpleDateFormat
+import java.util.Locale
+
+class BookingViewModel : ViewModel() {
+    private val _state = MutableStateFlow(BookingState())
+    val state: StateFlow<BookingState> = _state.asStateFlow()
+
+    init {
+        onIntent(BookingIntent.LoadData)
+    }
+
+    fun onIntent(intent: BookingIntent) {
+        when (intent) {
+            is BookingIntent.LoadData -> loadData()
+            is BookingIntent.SelectDate -> selectDate(intent.date)
+            is BookingIntent.SelectPlace -> selectPlace(intent.placeId)
+            is BookingIntent.Book -> book()
+            is BookingIntent.Refresh -> refresh()
+        }
+    }
+
+    private fun loadData() {
+        viewModelScope.launch {
+            _state.value = _state.value.copy(isLoading = true, error = null)
+
+            val code = DataStoreManager.getAuthCode()
+            if (code == null) {
+                _state.value = _state.value.copy(
+                    isLoading = false,
+                    error = "Код авторизации не найден"
+                )
+                return@launch
+            }
+
+            when (val result = BookingRepository.getAvailableForBooking(code)) {
+                is MyResult.Success -> {
+                    val dateToPlacesMap = result.data.dateToPlaces
+
+                    val sortedDates = dateToPlacesMap.keys
+                        .filter { date ->
+                            val places = dateToPlacesMap[date]
+                            places != null && places.isNotEmpty()
+                        }
+                        .sortedBy { parseDate(it) }
+
+                    val firstDate = sortedDates.firstOrNull()
+                    val places = firstDate?.let { dateToPlacesMap[it] } ?: emptyList()
+
+                    _state.value = BookingState(
+                        isLoading = false,
+                        dates = sortedDates,
+                        dateToPlacesMap = dateToPlacesMap,
+                        selectedDate = firstDate,
+                        availablePlaces = places,
+                        selectedPlaceId = null
+                    )
+                }
+                is MyResult.Error -> {
+                    _state.value = _state.value.copy(
+                        isLoading = false,
+                        error = result.error
+                    )
+                }
+            }
+        }
+    }
+
+    private fun selectDate(date: String) {
+        val currentState = _state.value
+        val places = currentState.dateToPlacesMap[date] ?: emptyList()
+
+        _state.value = _state.value.copy(
+            selectedDate = date,
+            availablePlaces = places,
+            selectedPlaceId = null
+        )
+    }
+
+    private fun selectPlace(placeId: Int) {
+        _state.value = _state.value.copy(selectedPlaceId = placeId)
+    }
+
+    private fun book() {
+        val currentState = _state.value
+        val date = currentState.selectedDate
+        val placeId = currentState.selectedPlaceId
+
+        if (date == null || placeId == null) return
+
+        viewModelScope.launch {
+            _state.value = _state.value.copy(isBookingInProgress = true, error = null)
+
+            val code = DataStoreManager.getAuthCode()
+            if (code == null) {
+                _state.value = _state.value.copy(
+                    isBookingInProgress = false,
+                    error = "Код авторизации не найден"
+                )
+                return@launch
+            }
+
+            when (val result = BookingRepository.createBooking(code, date, placeId)) {
+                is MyResult.Success -> {
+                    _state.value = _state.value.copy(
+                        isBookingInProgress = false,
+                        bookingSuccess = true
+                    )
+                }
+                is MyResult.Error -> {
+                    _state.value = _state.value.copy(
+                        isBookingInProgress = false,
+                        error = result.error
+                    )
+                }
+            }
+        }
+    }
+
+    private fun refresh() {
+        loadData()
+    }
+
+    private fun parseDate(dateString: String): Long {
+        return try {
+            val dateFormat = SimpleDateFormat("yyyy-MM-dd", Locale.US)
+            dateFormat.parse(dateString)?.time ?: 0L
+        } catch (e: Exception) {
+            0L
+        }
+    }
+}

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

@@ -0,0 +1,6 @@
+package ru.myitschool.work.core
+
+sealed class MyResult<out T> {
+    data class Success<T>(val data: T): MyResult<T>()
+    data class Error(val error: String): MyResult<Nothing>()
+}

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

@@ -0,0 +1,113 @@
+package ru.myitschool.work.core
+
+import android.util.Log
+import io.ktor.client.HttpClient
+import io.ktor.client.call.body
+import io.ktor.client.engine.cio.CIO
+import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
+import io.ktor.client.request.get
+import io.ktor.client.request.post
+import io.ktor.client.request.setBody
+import io.ktor.client.statement.bodyAsText
+import io.ktor.http.ContentType
+import io.ktor.http.HttpStatusCode
+import io.ktor.http.contentType
+import io.ktor.serialization.kotlinx.json.json
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.json.Json
+import ru.myitschool.work.booking.data.AvailableBookingResponse
+import ru.myitschool.work.booking.data.AvailablePlace
+import ru.myitschool.work.booking.data.BookRequest
+import ru.myitschool.work.user.data.UserInfoResponse
+
+object NetworkDataSource {
+    private val client by lazy {
+        HttpClient(CIO) {
+            install(ContentNegotiation) {
+                json(
+                    Json {
+                        isLenient = true
+                        ignoreUnknownKeys = true
+                        explicitNulls = true
+                        encodeDefaults = true
+                    }
+                )
+            }
+        }
+    }
+
+    suspend fun checkAuth(code: String): MyResult<Boolean> = withContext(Dispatchers.IO) {
+        try {
+            val response = client.get(getUrl(code, Constants.AUTH_URL))
+            when (response.status) {
+                HttpStatusCode.OK -> MyResult.Success(true)
+                else -> {
+                    MyResult.Error("Неверный код или ошибка сервера")
+                }
+            }
+        } catch (e: Exception) {
+            MyResult.Error("Сетевая ошибка")
+        }
+    }
+
+    suspend fun getUserInfo(code: String): MyResult<UserInfoResponse> =
+        withContext(Dispatchers.IO) {
+            try {
+                val response = client.get(getUrl(code, Constants.INFO_URL))
+                when (response.status) {
+                    HttpStatusCode.OK -> {
+                        val userInfo: UserInfoResponse = response.body()
+                        MyResult.Success(userInfo)
+                    }
+
+                    else -> {
+                        MyResult.Error("Ошибка получения данных пользователя")
+                    }
+                }
+            } catch (e: Exception) {
+                MyResult.Error("Сетевая ошибка")
+            }
+        }
+
+    suspend fun getAvailableForBooking(code: String): MyResult<AvailableBookingResponse> =
+        withContext(Dispatchers.IO) {
+            try {
+                val response = client.get(getUrl(code, Constants.BOOKING_URL))
+                when (response.status) {
+                    HttpStatusCode.OK -> {
+                        val bookingResponse: Map<String, List<AvailablePlace>> = response.body()
+                        MyResult.Success(bookingResponse)
+                    }
+
+                    else -> {
+                        MyResult.Error("Ошибка получения доступных мест")
+                    }
+                }
+            } catch (e: Exception) {
+                MyResult.Error("Сетевая ошибка")
+            }
+        }
+
+    suspend fun createBooking(code: String, date: String, placeId: Int): MyResult<Unit> =
+        withContext(Dispatchers.IO) {
+            try {
+                val response = client.post(getUrl(code, Constants.BOOK_URL)) {
+                    contentType(ContentType.Application.Json)
+                    setBody(BookRequest(date = date, placeID = placeId))
+                }
+                when (response.status) {
+                    HttpStatusCode.OK, HttpStatusCode.Created -> {
+                        MyResult.Success(Unit)
+                    }
+
+                    else -> {
+                        MyResult.Error("Ошибка бронирования")
+                    }
+                }
+            } catch (e: Exception) {
+                MyResult.Error("Сетевая ошибка")
+            }
+        }
+    private fun getUrl(code: String, targetUrl: String) = "${Constants.HOST}/api/$code$targetUrl"
+}

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

@@ -1,16 +0,0 @@
-package ru.myitschool.work.data.repo
-
-import ru.myitschool.work.data.source.NetworkDataSource
-
-object AuthRepository {
-
-    private var codeCache: String? = null
-
-    suspend fun checkAndSave(text: String): Result<Boolean> {
-        return NetworkDataSource.checkAuth(text).onSuccess { success ->
-            if (success) {
-                codeCache = text
-            }
-        }
-    }
-}

app/src/main/java/ru/myitschool/work/data/source/NetworkDataSource.kt

@@ -1,42 +0,0 @@
-package ru.myitschool.work.data.source
-
-import io.ktor.client.HttpClient
-import io.ktor.client.engine.cio.CIO
-import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
-import io.ktor.client.request.get
-import io.ktor.client.statement.bodyAsText
-import io.ktor.http.HttpStatusCode
-import io.ktor.serialization.kotlinx.json.json
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
-import kotlinx.serialization.json.Json
-import ru.myitschool.work.core.Constants
-
-object NetworkDataSource {
-    private val client by lazy {
-        HttpClient(CIO) {
-            install(ContentNegotiation) {
-                json(
-                    Json {
-                        isLenient = true
-                        ignoreUnknownKeys = true
-                        explicitNulls = true
-                        encodeDefaults = true
-                    }
-                )
-            }
-        }
-    }
-
-    suspend fun checkAuth(code: String): Result<Boolean> = withContext(Dispatchers.IO) {
-        return@withContext runCatching {
-            val response = client.get(getUrl(code, Constants.AUTH_URL))
-            when (response.status) {
-                HttpStatusCode.OK -> true
-                else -> error(response.bodyAsText())
-            }
-        }
-    }
-
-    private fun getUrl(code: String, targetUrl: String) = "${Constants.HOST}/api/$code$targetUrl"
-}

app/src/main/java/ru/myitschool/work/domain/auth/CheckAndSaveAuthCodeUseCase.kt

@@ -1,15 +0,0 @@
-package ru.myitschool.work.domain.auth
-
-import ru.myitschool.work.data.repo.AuthRepository
-
-class CheckAndSaveAuthCodeUseCase(
-    private val repository: AuthRepository
-) {
-    suspend operator fun invoke(
-        text: String
-    ): Result<Unit> {
-        return repository.checkAndSave(text).mapCatching { success ->
-            if (!success) error("Code is incorrect")
-        }
-    }
-}

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

@@ -0,0 +1,87 @@
+package ru.myitschool.work.ui
+
+import androidx.compose.animation.EnterTransition
+import androidx.compose.animation.ExitTransition
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavHostController
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.rememberNavController
+import ru.myitschool.work.auth.presentation.AuthScreen
+import ru.myitschool.work.booking.presentation.BookingScreen
+import ru.myitschool.work.user.presentation.MainScreen
+import ru.myitschool.work.user.presentation.MainViewModel
+import ru.myitschool.work.util.DataStoreManager
+
+@Composable
+fun AppNavHost(
+    modifier: Modifier = Modifier,
+    navController: NavHostController = rememberNavController()
+) {
+    var startDestination by remember { mutableStateOf<Screen>(Screen.Auth) }
+
+    LaunchedEffect(Unit) {
+        val isAuth = DataStoreManager.isAuthenticated()
+        startDestination = if (isAuth) {
+            Screen.Main
+        } else {
+            Screen.Auth
+        }
+    }
+
+    NavHost(
+        modifier = modifier,
+        enterTransition = { EnterTransition.None },
+        exitTransition = { ExitTransition.None },
+        navController = navController,
+        startDestination = startDestination,
+    ) {
+        composable<Screen.Auth> {
+            AuthScreen(navController = navController)
+        }
+
+        composable<Screen.Main> { backStackEntry ->
+            val mainViewModel: MainViewModel = viewModel()
+
+            LaunchedEffect(navController.currentBackStackEntry) {
+                navController.currentBackStackEntry
+                    ?.savedStateHandle
+                    ?.getStateFlow<Boolean>("booking_success", false)
+                    ?.collect { bookingSuccess ->
+                        if (bookingSuccess) {
+                            mainViewModel.refreshAfterBooking()
+                            navController.currentBackStackEntry
+                                ?.savedStateHandle
+                                ?.set("booking_success", false)
+                        }
+                    }
+            }
+
+            MainScreen(
+                viewModel = mainViewModel,
+                navController = navController
+            )
+        }
+
+        composable<Screen.Book> {
+            BookingScreen(
+                onNavigateBack = {
+                    navController.popBackStack()
+                },
+                onBookingSuccess = {
+                    navController.previousBackStackEntry
+                        ?.savedStateHandle
+                        ?.set("booking_success", true)
+                    navController.popBackStack()
+                }
+            )
+        }
+    }
+}

app/src/main/java/ru/myitschool/work/ui/Screen.kt

@@ -0,0 +1,12 @@
+package ru.myitschool.work.ui
+
+import kotlinx.serialization.Serializable
+
+sealed interface Screen{
+    @Serializable
+    data object Auth: Screen
+    @Serializable
+    data object Book: Screen
+    @Serializable
+    data object Main: Screen
+}

app/src/main/java/ru/myitschool/work/ui/nav/AppDestination.kt

@@ -1,3 +0,0 @@
-package ru.myitschool.work.ui.nav
-
-sealed interface AppDestination

app/src/main/java/ru/myitschool/work/ui/nav/AuthScreenDestination.kt

@@ -1,6 +0,0 @@
-package ru.myitschool.work.ui.nav
-
-import kotlinx.serialization.Serializable
-
-@Serializable
-data object AuthScreenDestination: AppDestination

app/src/main/java/ru/myitschool/work/ui/nav/BookScreenDestination.kt

@@ -1,6 +0,0 @@
-package ru.myitschool.work.ui.nav
-
-import kotlinx.serialization.Serializable
-
-@Serializable
-data object BookScreenDestination: AppDestination

app/src/main/java/ru/myitschool/work/ui/nav/MainScreenDestination.kt

@@ -1,6 +0,0 @@
-package ru.myitschool.work.ui.nav
-
-import kotlinx.serialization.Serializable
-
-@Serializable
-data object MainScreenDestination: AppDestination

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

@@ -8,7 +8,7 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.Scaffold
 import androidx.compose.ui.Modifier
-import ru.myitschool.work.ui.screen.AppNavHost
+import ru.myitschool.work.ui.AppNavHost
 import ru.myitschool.work.ui.theme.WorkTheme
 
 class RootActivity : ComponentActivity() {
@@ -17,9 +17,9 @@ class RootActivity : ComponentActivity() {
         enableEdgeToEdge()
         setContent {
             WorkTheme {
-                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                Scaffold(modifier = Modifier.Companion.fillMaxSize()) { innerPadding ->
                     AppNavHost(
-                        modifier = Modifier
+                        modifier = Modifier.Companion
                             .fillMaxSize()
                             .padding(innerPadding)
                     )

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

@@ -1,49 +0,0 @@
-package ru.myitschool.work.ui.screen
-
-import androidx.compose.animation.EnterTransition
-import androidx.compose.animation.ExitTransition
-import androidx.compose.foundation.layout.Box
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.navigation.NavHostController
-import androidx.navigation.compose.NavHost
-import androidx.navigation.compose.composable
-import androidx.navigation.compose.rememberNavController
-import ru.myitschool.work.ui.nav.AuthScreenDestination
-import ru.myitschool.work.ui.nav.BookScreenDestination
-import ru.myitschool.work.ui.nav.MainScreenDestination
-import ru.myitschool.work.ui.screen.auth.AuthScreen
-
-@Composable
-fun AppNavHost(
-    modifier: Modifier = Modifier,
-    navController: NavHostController = rememberNavController()
-) {
-    NavHost(
-        modifier = modifier,
-        enterTransition = { EnterTransition.None },
-        exitTransition = { ExitTransition.None },
-        navController = navController,
-        startDestination = AuthScreenDestination,
-    ) {
-        composable<AuthScreenDestination> {
-            AuthScreen(navController = navController)
-        }
-        composable<MainScreenDestination> {
-            Box(
-                contentAlignment = Alignment.Center
-            ) {
-                Text(text = "Hello")
-            }
-        }
-        composable<BookScreenDestination> {
-            Box(
-                contentAlignment = Alignment.Center
-            ) {
-                Text(text = "Hello")
-            }
-        }
-    }
-}

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

@@ -1,6 +0,0 @@
-package ru.myitschool.work.ui.screen.auth
-
-sealed interface AuthIntent {
-    data class Send(val text: String): AuthIntent
-    data class TextInput(val text: String): AuthIntent
-}

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

@@ -1,97 +0,0 @@
-package ru.myitschool.work.ui.screen.auth
-
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.padding
-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.Text
-import androidx.compose.material3.TextField
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.collectAsState
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-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.platform.testTag
-import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.style.TextAlign
-import androidx.compose.ui.unit.dp
-import androidx.lifecycle.viewmodel.compose.viewModel
-import androidx.navigation.NavController
-import ru.myitschool.work.R
-import ru.myitschool.work.core.TestIds
-import ru.myitschool.work.ui.nav.MainScreenDestination
-
-@Composable
-fun AuthScreen(
-    viewModel: AuthViewModel = viewModel(),
-    navController: NavController
-) {
-    val state by viewModel.uiState.collectAsState()
-
-    LaunchedEffect(Unit) {
-        viewModel.actionFlow.collect {
-            navController.navigate(MainScreenDestination)
-        }
-    }
-
-    Column(
-        modifier = Modifier
-            .fillMaxSize()
-            .padding(all = 24.dp),
-        horizontalAlignment = Alignment.CenterHorizontally,
-        verticalArrangement = Arrangement.Center
-    ) {
-        Text(
-            text = stringResource(R.string.auth_title),
-            style = MaterialTheme.typography.headlineSmall,
-            textAlign = TextAlign.Center
-        )
-        when (val currentState = state) {
-            is AuthState.Data -> Content(viewModel, currentState)
-            is AuthState.Loading -> {
-                CircularProgressIndicator(
-                    modifier = Modifier.size(64.dp)
-                )
-            }
-        }
-    }
-}
-
-@Composable
-private fun Content(
-    viewModel: AuthViewModel,
-    state: AuthState.Data
-) {
-    var inputText by remember { mutableStateOf("") }
-    Spacer(modifier = Modifier.size(16.dp))
-    TextField(
-        modifier = Modifier.testTag(TestIds.Auth.CODE_INPUT).fillMaxWidth(),
-        value = inputText,
-        onValueChange = {
-            inputText = it
-            viewModel.onIntent(AuthIntent.TextInput(it))
-        },
-        label = { Text(stringResource(R.string.auth_label)) }
-    )
-    Spacer(modifier = Modifier.size(16.dp))
-    Button(
-        modifier = Modifier.testTag(TestIds.Auth.SIGN_BUTTON).fillMaxWidth(),
-        onClick = {
-            viewModel.onIntent(AuthIntent.Send(inputText))
-        },
-        enabled = true
-    ) {
-        Text(stringResource(R.string.auth_sign_in))
-    }
-}

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

@@ -1,6 +0,0 @@
-package ru.myitschool.work.ui.screen.auth
-
-sealed interface AuthState {
-    object Loading: AuthState
-    object Data: AuthState
-}

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

@@ -1,43 +0,0 @@
-package ru.myitschool.work.ui.screen.auth
-
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.flow.MutableSharedFlow
-import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.flow.SharedFlow
-import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.flow.asStateFlow
-import kotlinx.coroutines.flow.update
-import kotlinx.coroutines.launch
-import ru.myitschool.work.data.repo.AuthRepository
-import ru.myitschool.work.domain.auth.CheckAndSaveAuthCodeUseCase
-
-class AuthViewModel : ViewModel() {
-    private val checkAndSaveAuthCodeUseCase by lazy { CheckAndSaveAuthCodeUseCase(AuthRepository) }
-    private val _uiState = MutableStateFlow<AuthState>(AuthState.Data)
-    val uiState: StateFlow<AuthState> = _uiState.asStateFlow()
-
-    private val _actionFlow: MutableSharedFlow<Unit> = MutableSharedFlow()
-    val actionFlow: SharedFlow<Unit> = _actionFlow
-
-    fun onIntent(intent: AuthIntent) {
-        when (intent) {
-            is AuthIntent.Send -> {
-                viewModelScope.launch(Dispatchers.Default) {
-                    _uiState.update { AuthState.Loading }
-                    checkAndSaveAuthCodeUseCase.invoke("9999").fold(
-                        onSuccess = {
-                            _actionFlow.emit(Unit)
-                        },
-                        onFailure = { error ->
-                            error.printStackTrace()
-                            _actionFlow.emit(Unit)
-                        }
-                    )
-                }
-            }
-            is AuthIntent.TextInput -> Unit
-        }
-    }
-}

app/src/main/java/ru/myitschool/work/user/data/UserInfoResponse.kt

@@ -0,0 +1,16 @@
+package ru.myitschool.work.user.data
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class UserInfoResponse(
+    val name: String,
+    val photoUrl: String,
+    val booking: Map<String, BookingItem> = emptyMap()
+)
+
+@Serializable
+data class BookingItem(
+    val id: Int,
+    val place: String
+)

app/src/main/java/ru/myitschool/work/user/data/UserRepository.kt

@@ -0,0 +1,32 @@
+package ru.myitschool.work.user.data
+
+import ru.myitschool.work.core.MyResult
+import ru.myitschool.work.core.NetworkDataSource
+import ru.myitschool.work.user.domain.User
+
+object UserRepository {
+
+    suspend fun getUserInfo(code: String): MyResult<User> {
+        return when (val result = NetworkDataSource.getUserInfo(code)) {
+            is MyResult.Success -> MyResult.Success(result.data.toUser())
+            is MyResult.Error -> result
+        }
+        /*return MyResult.Success(
+            User(
+                "kio",
+                "https://catalog-cdn.detmir.st/media/2fe02057f9915e72a378795d32c79ea9.jpeg",
+                mapOf(
+                    "15.12.2025" to "Кабинет 305",
+                    "20.12.2025" to "Аудитория 101",
+                    "01.01.2026" to "Лаборатория 12"
+                )
+            )
+        )*/
+    }
+
+    private fun UserInfoResponse.toUser() = User(
+        name = name,
+        imageUrl = photoUrl,
+        bookings = booking.mapValues { it.value.place }
+    )
+}

app/src/main/java/ru/myitschool/work/user/domain/GetUserUseCase.kt

@@ -0,0 +1,12 @@
+package ru.myitschool.work.user.domain
+
+import ru.myitschool.work.user.data.UserRepository
+import ru.myitschool.work.core.MyResult
+
+class GetUserUseCase(
+    private val repository: UserRepository
+) {
+    suspend operator fun invoke(code: String): MyResult<User> {
+        return repository.getUserInfo(code)
+    }
+}

app/src/main/java/ru/myitschool/work/user/domain/User.kt

@@ -0,0 +1,7 @@
+package ru.myitschool.work.user.domain
+
+data class User(
+    val name: String,
+    val imageUrl: String,
+    val bookings: Map<String, String> = emptyMap()
+)

app/src/main/java/ru/myitschool/work/user/presentation/BookingItem.kt

@@ -0,0 +1,48 @@
+package ru.myitschool.work.user.presentation
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.unit.dp
+import ru.myitschool.work.core.TestIds
+
+@Composable
+fun BookingItem(
+    booking: BookingDisplayItem,
+    index: Int
+) {
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+            .testTag(TestIds.Main.getIdItemByPosition(index)),
+        elevation = CardDefaults.cardElevation(defaultElevation = 2.dp)
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+        ) {
+            Text(
+                text = booking.date,
+                modifier = Modifier.testTag(TestIds.Main.ITEM_DATE),
+                style = MaterialTheme.typography.titleMedium
+            )
+            Spacer(modifier = Modifier.height(4.dp))
+            Text(
+                text = booking.place,
+                modifier = Modifier.testTag(TestIds.Main.ITEM_PLACE),
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+        }
+    }
+}

app/src/main/java/ru/myitschool/work/user/presentation/MainIntent.kt

@@ -0,0 +1,7 @@
+package ru.myitschool.work.user.presentation
+
+sealed interface MainIntent {
+    data object LogOut: MainIntent
+    data object Refresh: MainIntent
+    data object AddBooking: MainIntent
+}

app/src/main/java/ru/myitschool/work/user/presentation/MainScreen.kt

@@ -0,0 +1,227 @@
+package ru.myitschool.work.user.presentation
+
+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.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.Button
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavController
+import coil3.compose.AsyncImage
+import ru.myitschool.work.core.TestIds
+import ru.myitschool.work.ui.Screen
+
+@Composable
+fun MainScreen(
+    viewModel: MainViewModel = viewModel(),
+    navController: NavController
+) {
+    val state by viewModel.mainState.collectAsState()
+    LaunchedEffect(Unit) {
+        viewModel.navigationEvent.collect { event ->
+            when (event) {
+                MainViewModel.NavigationEvent.ToAuth -> {
+                    navController.navigate(Screen.Auth) {
+                        popUpTo(Screen.Auth) { inclusive = true }
+                        launchSingleTop = true
+                    }
+                }
+
+                MainViewModel.NavigationEvent.ToBooking -> {
+                    navController.navigate(Screen.Book)
+                }
+            }
+        }
+    }
+
+    Scaffold { padding ->
+        Box(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+        ) {
+            when {
+                state.error != null -> {
+                    ErrorContent(
+                        error = state.error!!,
+                        onRefresh = { viewModel.onIntent(MainIntent.Refresh) }
+                    )
+                }
+                state.isLoading -> {
+                    CircularProgressIndicator(
+                        modifier = Modifier.align(Alignment.Center)
+                    )
+                }
+                state.user != null -> {
+                    MainContent(
+                        state = state,
+                        onLogout = { viewModel.onIntent(MainIntent.LogOut) },
+                        onRefresh = { viewModel.onIntent(MainIntent.Refresh) },
+                        onAddBooking = { viewModel.onIntent(MainIntent.AddBooking) }
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun ErrorContent(
+    error: String,
+    onRefresh: () -> Unit
+) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(
+            text = error,
+            modifier = Modifier.testTag(TestIds.Main.ERROR),
+            style = MaterialTheme.typography.bodyLarge,
+            color = MaterialTheme.colorScheme.error
+        )
+        Spacer(modifier = Modifier.height(16.dp))
+        Button(
+            onClick = onRefresh,
+            modifier = Modifier.testTag(TestIds.Main.REFRESH_BUTTON)
+        ) {
+            Text("Обновить")
+        }
+    }
+}
+
+@Composable
+private fun MainContent(
+    state: MainState,
+    onLogout: () -> Unit,
+    onRefresh: () -> Unit,
+    onAddBooking: () -> Unit
+) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(16.dp)
+    ) {
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.SpaceBetween
+        ) {
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier.weight(1f)
+            ) {
+                AsyncImage(
+                    model = state.user?.imageUrl,
+                    contentDescription = null,
+                    modifier = Modifier
+                        .size(64.dp)
+                        .clip(CircleShape)
+                        .testTag(TestIds.Main.PROFILE_IMAGE)
+                )
+                Spacer(modifier = Modifier.width(16.dp))
+                Text(
+                    text = state.user?.name ?: "",
+                    modifier = Modifier.testTag(TestIds.Main.PROFILE_NAME),
+                    style = MaterialTheme.typography.headlineSmall
+                )
+            }
+        }
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.spacedBy(8.dp)
+        ) {
+            Button(
+                onClick = onRefresh,
+                modifier = Modifier
+                    .weight(1f)
+                    .testTag(TestIds.Main.REFRESH_BUTTON)
+            ) {
+                Text("Обновить")
+            }
+            Button(
+                onClick = onLogout,
+                modifier = Modifier
+                    .weight(1f)
+                    .testTag(TestIds.Main.LOGOUT_BUTTON)
+            ) {
+                Text("Выйти")
+            }
+        }
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        Button(
+            onClick = onAddBooking,
+            modifier = Modifier
+                .fillMaxWidth()
+                .testTag(TestIds.Main.ADD_BUTTON)
+        ) {
+            Text("Забронировать")
+        }
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        Text(
+            text = "Мои бронирования",
+            style = MaterialTheme.typography.titleLarge
+        )
+
+        Spacer(modifier = Modifier.height(8.dp))
+
+        if (state.bookings.isEmpty()) {
+            Box(
+                modifier = Modifier.fillMaxSize(),
+                contentAlignment = Alignment.Center
+            ) {
+                Text(
+                    text = "У вас пока нет бронирований",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+            }
+        } else {
+            LazyColumn(
+                modifier = Modifier.fillMaxSize(),
+                verticalArrangement = Arrangement.spacedBy(8.dp)
+            ) {
+                itemsIndexed(state.bookings) { index, booking ->
+                    BookingItem(
+                        booking = booking,
+                        index = index
+                    )
+                }
+            }
+        }
+    }
+}
+

app/src/main/java/ru/myitschool/work/user/presentation/MainState.kt

@@ -0,0 +1,17 @@
+package ru.myitschool.work.user.presentation
+
+import ru.myitschool.work.user.domain.User
+
+data class MainState(
+    val user: User? = null,
+    val bookings: List<BookingDisplayItem> = emptyList(),
+    val isLoading: Boolean = false,
+    val error: String? = null
+)
+
+data class BookingDisplayItem(
+    val date: String, // dd.MM.yyyy
+    val place: String,
+    val originalDate: String //для сортировки
+)
+

app/src/main/java/ru/myitschool/work/user/presentation/MainViewModel.kt

@@ -0,0 +1,131 @@
+package ru.myitschool.work.user.presentation
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import ru.myitschool.work.auth.data.AuthRepository
+import ru.myitschool.work.user.data.UserRepository
+import ru.myitschool.work.core.MyResult
+import ru.myitschool.work.auth.domain.LogOutUseCase
+import ru.myitschool.work.user.domain.GetUserUseCase
+import ru.myitschool.work.util.DataStoreManager
+import java.text.SimpleDateFormat
+import java.util.Locale
+
+class MainViewModel : ViewModel() {
+    private val logOutUseCase = LogOutUseCase(AuthRepository)
+    private val getUserUseCase = GetUserUseCase(UserRepository)
+
+    private val _mainState = MutableStateFlow(MainState())
+    val mainState = _mainState.asStateFlow()
+
+    private val _navigationEvent = MutableSharedFlow<NavigationEvent>(extraBufferCapacity = 1)
+    val navigationEvent: SharedFlow<NavigationEvent> = _navigationEvent.asSharedFlow()
+
+    init {
+        loadUser()
+    }
+
+    sealed class NavigationEvent {
+        data object ToAuth : NavigationEvent()
+        data object ToBooking : NavigationEvent()
+    }
+
+    fun onIntent(intent: MainIntent) {
+        when (intent) {
+            MainIntent.LogOut -> logOut()
+            MainIntent.Refresh -> loadUser()
+            MainIntent.AddBooking -> navigateToBooking()
+        }
+    }
+
+    fun refreshAfterBooking() {
+        loadUser()
+    }
+
+    private fun loadUser() {
+        viewModelScope.launch {
+            _mainState.update { it.copy(isLoading = true, error = null) }
+
+            val code = DataStoreManager.getAuthCode()
+            if (code.isNullOrBlank()) {
+                _navigationEvent.emit(NavigationEvent.ToAuth)
+                return@launch
+            }
+
+            when (val result = getUserUseCase(code)) {
+                is MyResult.Success -> {
+                    val bookings = convertBookingsToDisplayItems(result.data.bookings)
+                    _mainState.update {
+                        it.copy(
+                            user = result.data,
+                            bookings = bookings,
+                            isLoading = false,
+                            error = null
+                        )
+                    }
+                }
+
+                is MyResult.Error -> {
+                    _mainState.update {
+                        it.copy(
+                            isLoading = false,
+                            error = result.error,
+                            user = null,
+                            bookings = emptyList()
+                        )
+                    }
+                }
+            }
+        }
+    }
+
+
+    private fun convertBookingsToDisplayItems(bookings: Map<String, String>): List<BookingDisplayItem> {
+        val serverFormat = SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())
+        val displayFormat = SimpleDateFormat("dd.MM.yyyy", Locale.getDefault())
+
+        return bookings.map { (serverDate, place) ->
+            val displayDate = try {
+                val parsed = serverFormat.parse(serverDate)
+                displayFormat.format(parsed!!)
+            } catch (e: Exception) {
+                serverDate
+            }
+
+            BookingDisplayItem(
+                date = displayDate,
+                place = place,
+                originalDate = serverDate
+            )
+        }.sortedBy { item ->
+            item.originalDate
+        }
+    }
+
+    private fun logOut() {
+        viewModelScope.launch {
+            when (logOutUseCase()) {
+                is MyResult.Success -> {
+                    _mainState.update { MainState() }
+                    _navigationEvent.emit(NavigationEvent.ToAuth)
+                }
+                is MyResult.Error -> {
+                    _mainState.update { it.copy(error = "Ошибка при выходе") }
+                }
+            }
+        }
+    }
+
+    private fun navigateToBooking() {
+        viewModelScope.launch {
+            _navigationEvent.emit(NavigationEvent.ToBooking)
+        }
+    }
+}

app/src/main/java/ru/myitschool/work/util/DataStoreManager.kt

@@ -0,0 +1,38 @@
+package ru.myitschool.work.util
+
+import android.content.Context
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import ru.myitschool.work.App
+
+private val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "auth_prefs")
+object DataStoreManager {
+    private val AUTH_CODE_KEY = stringPreferencesKey("auth_code")
+
+    suspend fun saveAuthCode(code: String){
+        App.context.dataStore.edit { prefs ->
+            prefs[AUTH_CODE_KEY] = code
+        }
+    }
+    suspend fun getAuthCode(): String? {
+        return App.context.dataStore.data
+            .map { it[AUTH_CODE_KEY] }
+            .first()
+    }
+
+
+    suspend fun clearAuthCode() {
+        App.context.dataStore.edit { prefs ->
+            prefs.remove(AUTH_CODE_KEY)
+        }
+    }
+    suspend fun isAuthenticated(): Boolean {
+        return getAuthCode() != null
+    }
+}