некорректное отображение данных в корзине

.idea/deploymentTargetDropDown.xml

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="deploymentTargetDropDown">
-    <runningDeviceTargetSelectedWithDropDown>
-      <Target>
-        <type value="RUNNING_DEVICE_TARGET" />
-        <deviceKey>
-          <Key>
-            <type value="SERIAL_NUMBER" />
-            <value value="KFRSEQ6DTWWWQOE6" />
-          </Key>
-        </deviceKey>
-      </Target>
-    </runningDeviceTargetSelectedWithDropDown>
-    <timeTargetWasSelectedWithDropDown value="2023-12-17T14:14:18.887820Z" />
-  </component>
-</project>

app/src/main/java/com/example/myapplication/MainComposeActivity.kt

@@ -1,5 +1,6 @@
 package com.example.myapplication
 
+import android.content.Context
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
@@ -20,6 +21,7 @@ class MainComposeActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         application.deleteDatabase("pmy-db")
+        appContext = applicationContext
         setContent {
             PmudemoTheme(darkTheme = isDarkTheme.value) {
                 LaunchedEffect(key1 = true) {
@@ -40,4 +42,7 @@ class MainComposeActivity : ComponentActivity() {
             }
         }
     }
+    companion object {
+        lateinit var appContext: Context
+    }
 }

app/src/main/java/com/example/myapplication/api/MyServerService.kt

@@ -90,6 +90,11 @@ interface MyServerService {
         @Query("userId") userId: Int,
     ): List<UserSessionWithSessionRemote>
 
+    @GET("userssessions")
+    suspend fun getUserSessions(
+        @Query("userId") userId: Int,
+    ): List<UserSessionRemote>
+
     @GET("userssessions?_expand=session")
     suspend fun getUsersSessions(): List<UserSessionWithSessionRemote>
 

app/src/main/java/com/example/myapplication/api/cinema/CinemaRemoteMediator.kt

@@ -55,7 +55,7 @@ class CinemaRemoteMediator(
 
         try {
             val cinemas = service.getCinemas(page, state.config.pageSize).map { it.toCinema() }
-            val sessionsFromCinemas = cinemas.map { cinema ->
+            val sessionsFromCinemas = cinemas.flatMap { cinema ->
                 service.getCinemaWithSessions(cinema.uid).toSessions()
             }
             val endOfPaginationReached = cinemas.isEmpty()
@@ -77,13 +77,7 @@ class CinemaRemoteMediator(
                 }
                 dbRemoteKeyRepository.createRemoteKeys(keys)
                 dbCinemaRepository.insertCinemas(cinemas)
-                sessionsFromCinemas.forEach {
-                    try {
-                        dbSessionRepository.insertSessions(it)
-                    } catch (_: Exception) {
-
-                    }
-                }
+                dbSessionRepository.insertSessions(sessionsFromCinemas)
             }
             return MediatorResult.Success(endOfPaginationReached = endOfPaginationReached)
         } catch (exception: IOException) {

app/src/main/java/com/example/myapplication/api/cinema/RestCinemaRepository.kt

@@ -48,18 +48,18 @@ class RestCinemaRepository(
 
     override suspend fun getCinema(uid: Int): CinemaWithSessions {
         val cinemaWithSessions = service.getCinemaWithSessions(uid)
-
+        val orders = service.getOrders()
         val sessions = cinemaWithSessions.sessions.map { sessionFromCinemaRemote ->
             SessionFromCinema(
                 sessionFromCinemaRemote.id,
                 sessionFromCinemaRemote.dateTime,
                 sessionFromCinemaRemote.price,
-                sessionFromCinemaRemote.maxCount - service.getOrders().flatMap
+                sessionFromCinemaRemote.maxCount - orders.flatMap
                 { order ->
                     order.sessions.filter { session ->
                         session.id == sessionFromCinemaRemote.id &&
                                 session.cinemaId == sessionFromCinemaRemote.cinemaId &&
-                                session.cinema.name == cinemaWithSessions.name
+                                session.dateTime == sessionFromCinemaRemote.dateTime
                     }
                 }.sumOf { session -> session.count },
                 uid

app/src/main/java/com/example/myapplication/api/order/OrderRemoteMediator.kt

@@ -53,8 +53,8 @@ class OrderRemoteMediator(
 
         try {
             val orders = service.getOrders(
-                LiveStore.user.value?.uid ?: 0,
-                page, state.config.pageSize
+                userId = LiveStore.user.value?.uid ?: 0,
+                page = page, limit = state.config.pageSize
             ).map { it.toOrder() }
             val endOfPaginationReached = orders.isEmpty()
             database.withTransaction {

app/src/main/java/com/example/myapplication/api/order/RestOrderRepository.kt

@@ -24,9 +24,8 @@ class RestOrderRepository(
     private val dbRemoteKeyRepository: OfflineRemoteKeyRepository,
     private val database: AppDatabase
 ) : OrderRepository {
-    override fun getAllOrders(userId: Int): Flow<PagingData<Order>> {
-        val pagingSourceFactory = { dbOrderRepository.getAllOrdersPagingSource(userId) }
-
+    override fun getAllOrders(): Flow<PagingData<Order>> {
+        val pagingSourceFactory = { dbOrderRepository.getAllOrdersPagingSource() }
         @OptIn(ExperimentalPagingApi::class)
         return Pager(
             config = PagingConfig(

app/src/main/java/com/example/myapplication/api/ordersession/RestOrderSessionRepository.kt

@@ -11,7 +11,7 @@ class RestOrderSessionRepository(
     private val dbOrderSessionRepository: OfflineOrderSessionRepository
 ) : OrderSessionRepository {
     override suspend fun insertOrderSession(orderSessionCrossRef: OrderSessionCrossRef) {
-        var orderRemote = service.getOrder(orderSessionCrossRef.orderId)
+        val orderRemote = service.getOrder(orderSessionCrossRef.orderId)
         val session = service.getSession(orderSessionCrossRef.sessionId)
 
         val sessionFromOrder = SessionFromOrderRemote(
@@ -23,10 +23,9 @@ class RestOrderSessionRepository(
             session.cinema
         )
 
-        val updatedSessions = orderRemote.sessions.toMutableList()
-        updatedSessions.add(sessionFromOrder)
-
-        orderRemote = orderRemote.copy(sessions = updatedSessions)
+        orderRemote.sessions = orderRemote.sessions.toMutableList().apply {
+            add(sessionFromOrder)
+        }
         service.updateOrder(orderSessionCrossRef.orderId, orderRemote)
         dbOrderSessionRepository.insertOrderSession(orderSessionCrossRef)
     }

app/src/main/java/com/example/myapplication/api/user/RestUserRepository.kt

@@ -37,14 +37,27 @@ class RestUserRepository(
                 )
             )
         }
-        return cart.map {
-            val cinema = service.getCinema(it.session.cinemaId)
-            it.toSessionFromCart(
-                it.session.maxCount - service.getOrders().flatMap { order ->
-                    order.sessions.filter { session -> session.id == it.id }
-                }.sumOf { session -> session.count }, cinema.toCinema()
+        val orders = service.getOrders()
+        val sessions = cart.map { sessionFromCartRemote ->
+            SessionFromCart(
+                uid = sessionFromCartRemote.sessionId,
+                dateTime = sessionFromCartRemote.session.dateTime,
+                price = sessionFromCartRemote.session.price,
+                availableCount = sessionFromCartRemote.session.maxCount - orders
+                    .flatMap
+                    { order ->
+                        order.sessions.filter { session ->
+                            session.id == sessionFromCartRemote.sessionId &&
+                                    session.cinemaId == sessionFromCartRemote.session.cinemaId &&
+                                    session.dateTime == sessionFromCartRemote.session.dateTime
+                        }
+                    }.sumOf { session -> session.count },
+                count = sessionFromCartRemote.count,
+                cinemaId = sessionFromCartRemote.session.cinemaId,
+                cinema = service.getCinema(sessionFromCartRemote.session.cinemaId).toCinema()
             )
         }
+        return sessions
     }
 
     override suspend fun insertUser(user: User) {

app/src/main/java/com/example/myapplication/api/user/UserSessionWithSessionRemote.kt

@@ -1,8 +1,6 @@
 package com.example.myapplication.api.user
 
 import com.example.myapplication.api.session.SessionRemote
-import com.example.myapplication.database.entities.model.Cinema
-import com.example.myapplication.database.entities.model.SessionFromCart
 import kotlinx.serialization.Serializable
 
 @Serializable
@@ -13,16 +11,3 @@ data class UserSessionWithSessionRemote(
     val count: Int = 0,
     val session: SessionRemote,
 )
-
-fun UserSessionWithSessionRemote.toSessionFromCart(
-    availableCount: Int = 0,
-    cinema: Cinema
-): SessionFromCart = SessionFromCart(
-    sessionId,
-    session.dateTime,
-    session.price,
-    availableCount,
-    count,
-    session.cinemaId,
-    cinema
-)

app/src/main/java/com/example/myapplication/api/usersession/RestUserSessionRepository.kt

@@ -46,16 +46,20 @@ class RestUserSessionRepository(
         val userSessionRemote = service.getUserSession(
             userSessionCrossRef.userId,
             userSessionCrossRef.sessionId
-        ).first()
+        ).firstOrNull() ?: return
         service.deleteUserSession(userSessionRemote.id)
         dbUserSessionRepository.deleteUserSession(userSessionCrossRef)
     }
 
     override suspend fun deleteUserSessions(userId: Int) {
-        val cart = service.getUserCart(userId)
+        val cart = service.getUserSessions(userId)
         cart.forEach {
             service.deleteUserSession(it.id)
         }
         dbUserSessionRepository.deleteUserSessions(userId)
     }
+
+    override suspend fun deleteUserSessions(userSessionCrossRefs: List<UserSessionCrossRef>) {
+        userSessionCrossRefs.forEach { deleteUserSession(it) }
+    }
 }

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

@@ -15,21 +15,17 @@ fun Authenticator(
     viewModel: AuthenticatorViewModel = viewModel(factory = AppViewModelProvider.Factory)
 ) {
     val scope = rememberCoroutineScope()
-
     val login = dataStoreManager.getLogin().collectAsState(initial = "").value
 
+    LiveStore.user.value = viewModel.authUiState.user
+
     fun synchronize() {
         scope.launch {
             if (login == "") {
                 LiveStore.user.value = null
                 return@launch
             }
-            val overlap = viewModel.findUserByLogin(login)
-            if (overlap == null) {
-                dataStoreManager.setLogin("")
-                return@launch
-            }
-            LiveStore.user.value = overlap
+            viewModel.findUserByLogin(login)
         }
     }
 

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

@@ -1,18 +1,27 @@
 package com.example.myapplication.composeui
 
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
 import com.example.myapplication.database.entities.model.User
 import com.example.myapplication.database.entities.repository.UserRepository
 
 class AuthenticatorViewModel(
     private val userRepository: UserRepository
 ) : MyViewModel() {
-    suspend fun findUserByLogin(login: String): User? {
-        var user: User? = null
+    var authUiState by mutableStateOf(AuthenticatorUiState())
+        private set
+
+    suspend fun findUserByLogin(login: String) {
         runInScope(
             actionSuccess = {
-                user = userRepository.getUser(login)
+                authUiState = AuthenticatorUiState(userRepository.getUser(login))
+            },
+            actionError = {
+                authUiState = AuthenticatorUiState()
             }
         )
-        return user
     }
 }
+
+data class AuthenticatorUiState(val user: User? = null)

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

@@ -1,6 +1,5 @@
 package com.example.myapplication.composeui
 
-import android.content.res.Configuration
 import android.graphics.BitmapFactory
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
@@ -10,6 +9,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 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.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
@@ -17,16 +17,12 @@ import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Delete
 import androidx.compose.material3.Button
-import androidx.compose.material3.DismissDirection
-import androidx.compose.material3.DismissState
-import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
-import androidx.compose.material3.rememberDismissState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.livedata.observeAsState
@@ -37,21 +33,23 @@ import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.res.vectorResource
-import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavController
 import com.example.myapplication.LiveStore
 import com.example.myapplication.R
+import com.example.myapplication.api.ApiStatus
+import com.example.myapplication.composeui.navigation.Screen
 import com.example.myapplication.database.entities.composeui.AppViewModelProvider
 import com.example.myapplication.database.entities.model.Session
 import com.example.myapplication.database.entities.model.SessionFromCart
 import com.example.myapplication.database.entities.model.UserRole
-import com.example.myapplication.ui.theme.PmudemoTheme
 import kotlinx.coroutines.launch
 import org.threeten.bp.format.DateTimeFormatter
 
 @Composable
 fun Cart(
+    navController: NavController,
     viewModel: CartViewModel = viewModel(factory = AppViewModelProvider.Factory)
 ) {
     val coroutineScope = rememberCoroutineScope()
@@ -60,24 +58,12 @@ fun Cart(
     LaunchedEffect(Unit) {
         viewModel.refreshState()
     }
-
+    when (viewModel.apiStatus) {
+        ApiStatus.DONE -> {
             Cart(
                 cartUiState = cartUiState,
                 modifier = Modifier
                     .padding(all = 10.dp),
-        onSwipe = { session: SessionFromCart ->
-            coroutineScope.launch {
-                viewModel.removeFromCart(
-                    session = Session(
-                        uid = session.uid,
-                        dateTime = session.dateTime,
-                        price = session.price,
-                        maxCount = 0,
-                        cinemaId = session.cinemaId
-                    )
-                )
-            }
-        },
                 onChangeCount = { session: SessionFromCart, count: Int ->
                     coroutineScope.launch {
                         viewModel.updateFromCart(
@@ -95,30 +81,43 @@ fun Cart(
                     coroutineScope.launch {
                         viewModel.addToOrder(sessions = sessions)
                     }
+                },
+                onDelete = { session: SessionFromCart ->
+                    coroutineScope.launch {
+                        viewModel.removeFromCart(
+                            session = Session(
+                                uid = session.uid,
+                                dateTime = session.dateTime,
+                                price = session.price,
+                                maxCount = 0,
+                                cinemaId = session.cinemaId
+                            )
+                        )
+                    }
                 }
             )
         }
 
-@OptIn(ExperimentalMaterial3Api::class)
+        ApiStatus.LOADING -> LoadingPlaceholder()
+        else -> ErrorPlaceholder(
+            message = viewModel.apiError,
+            onBack = { navController.navigate(Screen.Report.route) }
+        )
+    }
+}
+
 @Composable
 private fun Cart(
     cartUiState: CartUiState,
     modifier: Modifier,
-    onSwipe: (SessionFromCart) -> Unit,
     onChangeCount: (SessionFromCart, Int) -> Unit,
-    onAddToOrder: (List<SessionFromCart>) -> Unit
+    onAddToOrder: (List<SessionFromCart>) -> Unit,
+    onDelete: (SessionFromCart) -> Unit
 ) {
     LazyColumn(
         modifier = modifier
     ) {
         items(cartUiState.sessionList, key = { it.uid.toString() }) { session ->
-            val dismissState: DismissState = rememberDismissState(
-                positionalThreshold = { 200.dp.toPx() }
-            )
-
-            if (dismissState.isDismissed(direction = DismissDirection.EndToStart)) {
-                onSwipe(session)
-            }
             SessionListItem(
                 session = session,
                 modifier = Modifier
@@ -126,9 +125,13 @@ private fun Cart(
                     .padding(10.dp)
                     .clip(RoundedCornerShape(16.dp))
                     .background(MaterialTheme.colorScheme.secondary),
-                onChangeCount = onChangeCount
+                onChangeCount = onChangeCount,
+                onDelete = onDelete,
             )
         }
+        item {
+            Spacer(modifier = Modifier.height(48.dp))
+        }
     }
     val user = LiveStore.user.observeAsState()
     if (user.value?.role == UserRole.USER) {
@@ -138,7 +141,7 @@ private fun Cart(
             Button(
                 onClick = { onAddToOrder(cartUiState.sessionList) },
                 modifier = Modifier
-                    .padding(16.dp)
+                    .padding(6.dp)
                     .fillMaxWidth()
             ) { Text("Купить") }
         }
@@ -150,27 +153,26 @@ private fun SessionListItem(
     session: SessionFromCart,
     modifier: Modifier = Modifier,
     onChangeCount: (SessionFromCart, Int) -> Unit,
+    onDelete: (SessionFromCart) -> Unit
 ) {
-    //var currentCount by remember { mutableIntStateOf(session.count) }
-
     val dateFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm")
     val formattedDate = dateFormatter.format(session.dateTime)
-    Column {
     Text(
         text = formattedDate,
         color = MaterialTheme.colorScheme.onBackground,
     )
+    Column(modifier = modifier.fillMaxWidth()) {
         Box(
-            modifier = modifier
-        ) {
-            Row(
             modifier = Modifier
                 .fillMaxWidth()
-                    .padding(8.dp),
+                .padding(8.dp)
+        ) {
+            Row(
+                modifier = Modifier.fillMaxWidth(),
                 verticalAlignment = Alignment.CenterVertically,
                 horizontalArrangement = Arrangement.SpaceBetween
             ) {
-                if (session.cinema.image != null)
+                if (session.cinema.image != null) {
                     Image(
                         bitmap = BitmapFactory.decodeByteArray(
                             session.cinema.image,
@@ -182,6 +184,7 @@ private fun SessionListItem(
                             .size(90.dp)
                             .padding(4.dp)
                     )
+                }
 
                 Column(
                     modifier = Modifier.weight(1f),
@@ -190,38 +193,51 @@ private fun SessionListItem(
                     Text(
                         text = "${session.cinema.name}, ${session.cinema.year}\n" +
                                 "Цена: ${session.price}\n" +
-                                "${session.count}/${session.availableCount}",
+                                if (session.availableCount == 0) "Недоступно" else "${session.count}/${session.availableCount}",
                         color = MaterialTheme.colorScheme.onSecondary
                     )
                 }
+            }
+        }
 
-                Box(
-                    modifier = Modifier
-                        .background(
-                            color = MaterialTheme.colorScheme.background,
-                            shape = RoundedCornerShape(10.dp)
-                        ) // Задаем фон для кнопок
-                ) {
         Row(
+            modifier = Modifier
+                .background(color = MaterialTheme.colorScheme.primary)
+                .fillMaxWidth(),
+            horizontalArrangement = Arrangement.spacedBy(8.dp),
             verticalAlignment = Alignment.CenterVertically
         ) {
             IconButton(
+                onClick = { onDelete(session) }
+            ) {
+                Icon(
+                    imageVector = Icons.Default.Delete,
+                    contentDescription = "Удалить",
+                    tint = MaterialTheme.colorScheme.onPrimary
+                )
+            }
+
+            Spacer(modifier = Modifier.weight(1F))
+
+            if (session.availableCount != 0) {
+                IconButton(
+                    enabled = session.count != 1,
                     onClick = { onChangeCount(session, session.count - 1) }
                 ) {
                     Icon(
                         imageVector = ImageVector.vectorResource(id = R.drawable.minus),
                         contentDescription = "Уменьшить",
-                                tint = MaterialTheme.colorScheme.onBackground,
-                                modifier = Modifier.size(10.dp)
+                        tint = MaterialTheme.colorScheme.onPrimary
                     )
                 }
 
                 Text(
                     text = "${session.count}",
-                            color = MaterialTheme.colorScheme.onBackground
+                    color = MaterialTheme.colorScheme.onPrimary
                 )
 
                 IconButton(
+                    enabled = session.count != session.availableCount,
                     onClick = {
                         onChangeCount(
                             session,
@@ -232,26 +248,11 @@ private fun SessionListItem(
                     Icon(
                         imageVector = Icons.Default.Add,
                         contentDescription = "Увеличить",
-                                tint = MaterialTheme.colorScheme.onBackground,
-                                modifier = Modifier.size(10.dp)
+                        tint = MaterialTheme.colorScheme.onPrimary
                     )
                 }
-                    }
-                }
-            }
-        }
-    }
-}
 
-@Preview(name = "Light Mode", showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_NO)
-@Preview(name = "Dark Mode", showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_YES)
-@Composable
-fun CartPreview() {
-    PmudemoTheme {
-        Surface(
-            color = MaterialTheme.colorScheme.background
-        ) {
-            Cart()
+            }
         }
     }
 }

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

@@ -3,7 +3,7 @@ package com.example.myapplication.composeui
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
-import androidx.lifecycle.ViewModel
+import androidx.room.Transaction
 import com.example.myapplication.LiveStore
 import com.example.myapplication.database.entities.model.Order
 import com.example.myapplication.database.entities.model.OrderSessionCrossRef
@@ -21,26 +21,37 @@ class CartViewModel(
     private val orderRepository: OrderRepository,
     private val orderSessionRepository: OrderSessionRepository,
     private val userRepository: UserRepository,
-) : ViewModel() {
+) : MyViewModel() {
     private var isLoading: Boolean = false
     var cartUiState by mutableStateOf(CartUiState())
         private set
 
-    suspend fun refreshState() {
-        val userId: Int = LiveStore.user.value?.uid ?: 0
-        val cart = userRepository.getCartByUser(userId)
-        cartUiState = CartUiState(cart)
+    suspend fun refreshState(needLoadingScreen: Boolean = true) {
+        val userId: Int = LiveStore.user.value?.uid ?: return
+        runInScope(
+            actionSuccess = {
+                cartUiState = CartUiState(userRepository.getCartByUser(userId))
+            }, actionError = {
+                cartUiState = CartUiState()
+            },
+            needLoadingScreen = needLoadingScreen
+        )
     }
 
+    @Transaction
     suspend fun addToOrder(sessions: List<SessionFromCart>) {
         if (isLoading)
             return
         isLoading = true
         val userId: Int = LiveStore.user.value?.uid ?: return
-        if (sessions.isEmpty())
+        val cart = sessions.filter { it.availableCount != 0 }
+        if (cart.isEmpty())
             return
+        runInScope(
+            actionSuccess = {
                 val orderId = orderRepository.insertOrder(Order(0, userId, LocalDateTime.now()))
-        sessions.forEach { session ->
+                cart.forEach { session ->
+                    if (session.availableCount != 0) {
                         orderSessionRepository.insertOrderSession(
                             OrderSessionCrossRef(
                                 orderId.toInt(),
@@ -50,27 +61,53 @@ class CartViewModel(
                             )
                         )
                     }
-        userSessionRepository.deleteUserSessions(userId)
+                }
+                userSessionRepository.deleteUserSessions(cart.map {
+                    UserSessionCrossRef(userId, it.uid, it.count)
+                })
                 refreshState()
             }
+        )
+    }
 
     suspend fun removeFromCart(session: Session, count: Int = 0) {
         val userId: Int = LiveStore.user.value?.uid ?: return
-        userSessionRepository.deleteUserSession(UserSessionCrossRef(userId, session.uid, count))
+        runInScope(
+            actionSuccess = {
+                userSessionRepository.deleteUserSession(
+                    UserSessionCrossRef(
+                        userId,
+                        session.uid,
+                        count
+                    )
+                )
                 refreshState()
             }
+        )
+    }
 
-    suspend fun updateFromCart(session: Session, count: Int, availableCount: Int): Boolean {
-        val userId: Int = LiveStore.user.value?.uid ?: return false
+    suspend fun updateFromCart(session: Session, count: Int, availableCount: Int) {
+        val userId: Int = LiveStore.user.value?.uid ?: return
         if (count == 0) {
             removeFromCart(session, count)
-            return false
+            return
         }
         if (count > availableCount)
-            return false
-        userSessionRepository.updateUserSession(UserSessionCrossRef(userId, session.uid, count))
+            return
+        runInScope(
+            actionSuccess = {
+                userSessionRepository.updateUserSession(
+                    UserSessionCrossRef(
+                        userId,
+                        session.uid,
+                        count
+                    )
+                )
                 refreshState()
-        return true
+            },
+            actionError = { },
+            needLoadingScreen = false
+        )
     }
 }
 

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

@@ -19,9 +19,11 @@ open class MyViewModel : ViewModel() {
 
     fun runInScope(
         actionSuccess: suspend () -> Unit,
-        actionError: suspend () -> Unit
+        actionError: suspend () -> Unit,
+        needLoadingScreen: Boolean = true,
     ) {
         viewModelScope.launch {
+            if (needLoadingScreen)
                 apiStatus = ApiStatus.LOADING
             runCatching {
                 actionSuccess()

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

@@ -1,6 +1,5 @@
 package com.example.myapplication.composeui
 
-import android.content.res.Configuration
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Spacer
@@ -8,8 +7,6 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.Button
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
@@ -17,12 +14,10 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
-import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.TextUnit
 import androidx.compose.ui.unit.TextUnitType
 import androidx.compose.ui.unit.dp
 import com.example.myapplication.R
-import com.example.myapplication.ui.theme.PmudemoTheme
 
 
 @Composable
@@ -68,29 +63,3 @@ fun LoadingPlaceholder() {
         )
     }
 }
-
-@Preview(name = "Light Mode", showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_NO)
-@Preview(name = "Dark Mode", showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_YES)
-@Composable
-fun ErrorPlaceholderPreview() {
-    PmudemoTheme {
-        Surface(
-            color = MaterialTheme.colorScheme.background
-        ) {
-            ErrorPlaceholder("Error", onBack = {})
-        }
-    }
-}
-
-@Preview(name = "Light Mode", showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_NO)
-@Preview(name = "Dark Mode", showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_YES)
-@Composable
-fun LoadingPlaceholderPreview() {
-    PmudemoTheme {
-        Surface(
-            color = MaterialTheme.colorScheme.background
-        ) {
-            LoadingPlaceholder()
-        }
-    }
-}

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

@@ -25,7 +25,10 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavController
+import com.example.myapplication.api.ApiStatus
 import com.example.myapplication.api.session.ReportRemote
+import com.example.myapplication.composeui.navigation.Screen
 import com.example.myapplication.database.entities.composeui.AppViewModelProvider
 import kotlinx.coroutines.launch
 import org.threeten.bp.format.DateTimeFormatter
@@ -34,11 +37,15 @@ import java.util.Date
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun Report(
+    navController: NavController,
     viewModel: ReportViewModel = viewModel(factory = AppViewModelProvider.Factory)
 ) {
     val dateStateStart = rememberDatePickerState(initialDisplayMode = DisplayMode.Input)
     val dateStateEnd = rememberDatePickerState(initialDisplayMode = DisplayMode.Input)
     val coroutineScope = rememberCoroutineScope()
+
+    when (viewModel.apiStatus) {
+        ApiStatus.DONE -> {
             Column(
                 modifier = Modifier
                     .verticalScroll(rememberScrollState())
@@ -83,7 +90,6 @@ fun Report(
                 Button(
                     onClick = { coroutineScope.launch { viewModel.getReport() } },
                     enabled = viewModel.reportUiState.isEntryValid,
-            shape = MaterialTheme.shapes.small,
                     modifier = Modifier.fillMaxWidth()
                 ) {
                     Text(text = "Получить отчет")
@@ -93,6 +99,14 @@ fun Report(
             }
         }
 
+        ApiStatus.LOADING -> LoadingPlaceholder()
+        else -> ErrorPlaceholder(
+            message = viewModel.apiError,
+            onBack = { navController.navigate(Screen.Report.route) }
+        )
+    }
+}
+
 @Composable
 fun CardScreen(reportData: List<ReportRemote>) {
     val dateFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm")

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

@@ -3,12 +3,11 @@ package com.example.myapplication.composeui
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
-import androidx.lifecycle.ViewModel
 import com.example.myapplication.api.session.ReportRemote
 import com.example.myapplication.api.session.RestSessionRepository
 import java.util.Date
 
-class ReportViewModel(private val serialRepository: RestSessionRepository) : ViewModel() {
+class ReportViewModel(private val serialRepository: RestSessionRepository) : MyViewModel() {
     var reportUiState by mutableStateOf(ReportUiState())
         private set
 
@@ -32,11 +31,17 @@ class ReportViewModel(private val serialRepository: RestSessionRepository) : Vie
 
     suspend fun getReport() {
         if (validateInput()) {
+            runInScope(
+                actionSuccess = {
                     val temp = serialRepository.getReport(
                         reportUiState.reportDetails.startDate,
                         reportUiState.reportDetails.endDate
                     )
                     reportResultUiState = ReportResultUiState(temp)
+                }, actionError = {
+                    reportResultUiState = ReportResultUiState()
+                }
+            )
         }
     }
 }

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

@@ -93,10 +93,10 @@ fun Topbar(
 
             Spacer(modifier = Modifier.width(16.dp))
 
-            if (currentScreen?.route == Screen.CinemaList.route) {
             Search(
                 initValue = LiveStore.searchRequest.value ?: "",
                 onDone = {
+                    navController.navigate(Screen.CinemaList.route)
                     LiveStore.searchRequest.value = it
                 },
                 modifier = Modifier
@@ -111,7 +111,6 @@ fun Topbar(
         }
     }
 }
-}
 
 @Composable
 fun Navbar(
@@ -163,8 +162,8 @@ fun Navhost(
     ) {
         composable(Screen.CinemaList.route) { CinemaList(navController) }
         composable(Screen.OrderList.route) { OrderList(navController) }
-        composable(Screen.Cart.route) { Cart() }
-        composable(Screen.UserProfile.route) { UserProfile(isDarkTheme, dataStore, navController) }
+        composable(Screen.Cart.route) { Cart(navController) }
+        composable(Screen.UserProfile.route) { UserProfile(isDarkTheme, dataStore) }
         composable(
             Screen.CinemaEdit.route,
             arguments = listOf(navArgument("id") { type = NavType.IntType })
@@ -188,9 +187,9 @@ fun Navhost(
             Screen.OrderView.route,
             arguments = listOf(navArgument("id") { type = NavType.IntType })
         ) { backStackEntry ->
-            backStackEntry.arguments?.let { OrderView(it.getInt("id")) }
+            backStackEntry.arguments?.let { OrderView(navController) }
         }
-        composable(Screen.Report.route) { Report() }
+        composable(Screen.Report.route) { Report(navController) }
     }
 }
 

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

@@ -56,7 +56,6 @@ fun CinemaList(
     LaunchedEffect(searchPattern.value) {
         viewModel.refresh()
     }
-
     Scaffold(
         topBar = {},
         floatingActionButton = {
@@ -99,6 +98,7 @@ fun CinemaList(
     }
 }
 
+
 @Composable
 private fun CinemaList(
     modifier: Modifier = Modifier,

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

@@ -21,12 +21,16 @@ class CinemaListViewModel(
 
     fun refresh() {
         val name = "%${LiveStore.searchRequest.value}%"
+        runInScope(actionSuccess = {
             val pagingSource = cinemaRepository.getAllCinemas(name)
             cinemaPagingFlow = CinemaPagingFlowState(pagingSource.cachedIn(viewModelScope))
+        })
     }
 
     suspend fun deleteCinema(cinema: Cinema) {
+        runInScope(actionSuccess = {
             cinemaRepository.deleteCinema(cinema)
+        })
     }
 }
 

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

@@ -31,6 +31,9 @@ import androidx.compose.ui.unit.sp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import com.example.myapplication.LiveStore
+import com.example.myapplication.api.ApiStatus
+import com.example.myapplication.composeui.ErrorPlaceholder
+import com.example.myapplication.composeui.LoadingPlaceholder
 import com.example.myapplication.composeui.navigation.Screen
 import com.example.myapplication.database.entities.model.Cinema
 import com.example.myapplication.database.entities.model.UserRole
@@ -42,11 +45,11 @@ fun CinemaView(
 ) {
     val cinemaUiState = viewModel.cinemaUiState
     val user = LiveStore.user.observeAsState()
-
     LaunchedEffect(Unit) {
         viewModel.refreshState()
     }
-
+    when (viewModel.apiStatus) {
+        ApiStatus.DONE -> {
             Column(
                 modifier = Modifier
                     .padding(16.dp)
@@ -143,3 +146,11 @@ fun CinemaView(
                 }
             }
         }
+
+        ApiStatus.LOADING -> LoadingPlaceholder()
+        else -> ErrorPlaceholder(
+            message = viewModel.apiError,
+            onBack = { navController.popBackStack() }
+        )
+    }
+}

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

@@ -4,13 +4,13 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.lifecycle.SavedStateHandle
-import androidx.lifecycle.ViewModel
+import com.example.myapplication.composeui.MyViewModel
 import com.example.myapplication.database.entities.model.CinemaWithSessions
 import com.example.myapplication.database.entities.repository.CinemaRepository
 
 class CinemaViewModel(
     savedStateHandle: SavedStateHandle, private val cinemaRepository: CinemaRepository
-) : ViewModel() {
+) : MyViewModel() {
     private val cinemaUid: Int = checkNotNull(savedStateHandle["id"])
 
     var cinemaUiState by mutableStateOf(CinemaUiState())
@@ -18,7 +18,11 @@ class CinemaViewModel(
 
     suspend fun refreshState() {
         if (cinemaUid > 0) {
+            runInScope(actionSuccess = {
                 cinemaUiState = CinemaUiState(cinemaRepository.getCinema(cinemaUid))
+            }, actionError = {
+                cinemaUiState = CinemaUiState()
+            })
         }
     }
 }

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

@@ -15,8 +15,6 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.tooling.preview.Preview
@@ -26,7 +24,6 @@ import androidx.navigation.NavController
 import androidx.paging.compose.collectAsLazyPagingItems
 import androidx.paging.compose.itemContentType
 import androidx.paging.compose.itemKey
-import com.example.myapplication.LiveStore
 import com.example.myapplication.composeui.navigation.Screen
 import com.example.myapplication.ui.theme.PmudemoTheme
 import org.threeten.bp.format.DateTimeFormatter
@@ -36,11 +33,8 @@ fun OrderList(
     navController: NavController?,
     viewModel: OrderListViewModel = viewModel(factory = AppViewModelProvider.Factory)
 ) {
-    val user = LiveStore.user.observeAsState()
     val ordersUiState = viewModel.orderListUiState.collectAsLazyPagingItems()
-    LaunchedEffect(user.value?.uid) {
-        viewModel.refreshState(user.value?.uid ?: 0)
-    }
+    
     LazyColumn(
         modifier = Modifier
             .fillMaxSize()

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

@@ -1,18 +1,13 @@
 package com.example.myapplication.database.entities.composeui
 
-import androidx.lifecycle.ViewModel
 import androidx.paging.PagingData
+import com.example.myapplication.composeui.MyViewModel
 import com.example.myapplication.database.entities.model.Order
 import com.example.myapplication.database.entities.repository.OrderRepository
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.emptyFlow
 
 class OrderListViewModel(
-    private val orderRepository: OrderRepository
-) : ViewModel() {
-    var orderListUiState: Flow<PagingData<Order>> = emptyFlow()
-
-    fun refreshState(userId: Int = 0) {
-        orderListUiState = orderRepository.getAllOrders(userId)
-    }
+    orderRepository: OrderRepository
+) : MyViewModel() {
+    var orderListUiState: Flow<PagingData<Order>> = orderRepository.getAllOrders()
 }

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

@@ -1,6 +1,5 @@
 package com.example.myapplication.database.entities.composeui
 
-import android.content.res.Configuration
 import android.graphics.BitmapFactory
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
@@ -15,37 +14,41 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.collectAsState
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.asImageBitmap
-import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
-import com.example.myapplication.ui.theme.PmudemoTheme
+import androidx.navigation.NavController
+import com.example.myapplication.api.ApiStatus
+import com.example.myapplication.composeui.ErrorPlaceholder
+import com.example.myapplication.composeui.LoadingPlaceholder
 import org.threeten.bp.format.DateTimeFormatter
 
 @Composable
 fun OrderView(
-    id: Int,
+    navController: NavController,
     viewModel: OrderViewModel = viewModel(factory = AppViewModelProvider.Factory)
 ) {
-    val coroutineScope = rememberCoroutineScope()
-    val orderUiState by viewModel.orderUiState.collectAsState()
+    val orderUiState = viewModel.orderUiState
+
+    LaunchedEffect(Unit) {
+        viewModel.refreshState()
+    }
+    when (viewModel.apiStatus) {
+        ApiStatus.DONE -> {
             LazyColumn(
                 modifier = Modifier
                     .padding(10.dp)
             ) {
                 items(orderUiState.sessionList) { session ->
-            val count = remember { mutableStateOf(session.count) }
+                    val count = remember { mutableIntStateOf(session.count) }
                     val dateFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm")
                     val formattedDate = dateFormatter.format(session.dateTime)
 
@@ -89,7 +92,7 @@ fun OrderView(
                                 Text(
                                     text = "${session.cinema.name}, ${session.cinema.year}\n" +
                                             "Цена: ${session.frozenPrice}\n" +
-                                    "Количество: ${count.value}",
+                                            "Количество: ${count.intValue}",
                                     color = MaterialTheme.colorScheme.onSecondary
                                 )
                             }
@@ -99,16 +102,10 @@ fun OrderView(
             }
         }
 
-
-@Preview(name = "Light Mode", showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_NO)
-@Preview(name = "Dark Mode", showBackground = true, uiMode = Configuration.UI_MODE_NIGHT_YES)
-@Composable
-fun OrderViewPreview() {
-    PmudemoTheme {
-        Surface(
-            color = MaterialTheme.colorScheme.background
-        ) {
-            OrderView(id = 1)
-        }
+        ApiStatus.LOADING -> LoadingPlaceholder()
+        else -> ErrorPlaceholder(
+            message = viewModel.apiError,
+            onBack = { navController.popBackStack() }
+        )
     }
 }

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

@@ -1,31 +1,29 @@
 package com.example.myapplication.database.entities.composeui
 
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
 import androidx.lifecycle.SavedStateHandle
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import com.example.myapplication.database.AppContainer
+import com.example.myapplication.composeui.MyViewModel
 import com.example.myapplication.database.entities.model.SessionFromOrder
 import com.example.myapplication.database.entities.repository.OrderRepository
-import kotlinx.coroutines.flow.SharingStarted
-import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.flow.flow
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.flow.stateIn
 
 class OrderViewModel(
     savedStateHandle: SavedStateHandle,
     private val orderRepository: OrderRepository
-) : ViewModel() {
+) : MyViewModel() {
     private val orderUid: Int = checkNotNull(savedStateHandle["id"])
 
-    val orderUiState: StateFlow<OrderUiState> =
-        flow { emit(orderRepository.getOrder(orderUid)) }.map {
-            OrderUiState(it)
-        }.stateIn(
-            scope = viewModelScope,
-            started = SharingStarted.WhileSubscribed(stopTimeoutMillis = AppContainer.TIMEOUT),
-            initialValue = OrderUiState()
-        )
+    var orderUiState by mutableStateOf(OrderUiState())
+        private set
+
+    suspend fun refreshState() {
+        runInScope(actionSuccess = {
+            orderUiState = OrderUiState(orderRepository.getOrder(orderUid))
+        }, actionError = {
+            orderUiState = OrderUiState()
+        })
+    }
 }
 
 data class OrderUiState(val sessionList: List<SessionFromOrder> = listOf())

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

@@ -113,7 +113,6 @@ fun SessionList(
                                 IconButton(
                                     onClick = {
                                         coroutineScope.launch {
-                                            if (session.availableCount != 0)
                                             viewModel.addSessionInCart(sessionId = session.uid)
                                         }
                                     },

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

@@ -1,7 +1,7 @@
 package com.example.myapplication.database.entities.composeui
 
-import androidx.lifecycle.ViewModel
 import com.example.myapplication.LiveStore
+import com.example.myapplication.composeui.MyViewModel
 import com.example.myapplication.database.entities.model.Session
 import com.example.myapplication.database.entities.model.SessionFromCinema
 import com.example.myapplication.database.entities.model.UserSessionCrossRef
@@ -11,8 +11,9 @@ import com.example.myapplication.database.entities.repository.UserSessionReposit
 class SessionListViewModel(
     private val sessionRepository: SessionRepository,
     private val userSessionRepository: UserSessionRepository
-) : ViewModel() {
+) : MyViewModel() {
     suspend fun deleteSession(session: SessionFromCinema) {
+        runInScope(actionSuccess = {
             sessionRepository.deleteSession(
                 Session(
                     uid = session.uid,
@@ -22,14 +23,19 @@ class SessionListViewModel(
                     cinemaId = 0
                 )
             )
+        })
     }
 
     suspend fun addSessionInCart(sessionId: Int, count: Int = 1) {
-        try {
         val userId: Int = LiveStore.user.value?.uid ?: return
-            userSessionRepository.insertUserSession(UserSessionCrossRef(userId, sessionId, count))
-        } catch (_: Exception) {
-
-        }
+        runInScope(actionSuccess = {
+            userSessionRepository.insertUserSession(
+                UserSessionCrossRef(
+                    userId,
+                    sessionId,
+                    count
+                )
+            )
+        })
     }
 }

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

@@ -18,6 +18,7 @@ import androidx.compose.material3.Switch
 import androidx.compose.material3.SwitchDefaults
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.livedata.observeAsState
@@ -32,7 +33,6 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
-import androidx.navigation.NavController
 import com.example.myapplication.LiveStore
 import com.example.myapplication.datastore.DataStoreManager
 import kotlinx.coroutines.launch
@@ -41,15 +41,21 @@ import kotlinx.coroutines.launch
 fun UserProfile(
     isDarkTheme: MutableState<Boolean>,
     dataStoreManager: DataStoreManager,
-    navController: NavController,
     viewModel: UserProfileViewModel = viewModel(factory = AppViewModelProvider.Factory),
 ) {
     var isRegistration by remember { mutableStateOf(false) }
     val coroutine = rememberCoroutineScope()
     val errorStringId: Int? = viewModel.userUiState.errorId
-    val errorMessage = if (errorStringId == null) "" else stringResource(errorStringId)
+    val errorMessage =
+        if (errorStringId == null || errorStringId == 0) "" else stringResource(errorStringId)
     val user = LiveStore.user.observeAsState()
 
+    LaunchedEffect(errorStringId) {
+        if (errorStringId == 0) {
+            isRegistration = false
+        }
+    }
+
     LazyColumn {
         item {
             if (user.value != null) {
@@ -70,7 +76,7 @@ fun UserProfile(
                         },
                         modifier = Modifier
                             .fillMaxWidth()
-                            .padding(8.dp)
+                            .padding(start = 2.dp, top = 10.dp)
                     ) { Text("Выход") }
                 }
             } else {
@@ -151,10 +157,10 @@ fun UserProfile(
 
                     if (isRegistration) {
                         Button(
-                            onClick = { coroutine.launch { isRegistration = !viewModel.signUp() } },
+                            onClick = { coroutine.launch { viewModel.signUp() } },
                             modifier = Modifier
                                 .fillMaxWidth()
-                                .padding(8.dp)
+                                .padding(start = 2.dp, top = 8.dp)
                         ) {
                             Text("Регистрация")
                         }
@@ -171,14 +177,12 @@ fun UserProfile(
                         Button(
                             onClick = {
                                 coroutine.launch {
-                                    if (viewModel.signIn(dataStoreManager)) {
-                                        navController.popBackStack()
-                                    }
+                                    viewModel.signIn(dataStoreManager)
                                 }
                             },
                             modifier = Modifier
                                 .fillMaxWidth()
-                                .padding(8.dp)
+                                .padding(start = 2.dp, top = 8.dp)
                         ) {
                             Text("Вход")
                         }

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

@@ -1,17 +1,20 @@
 package com.example.myapplication.database.entities.composeui
 
+import android.util.Log
+import android.widget.Toast
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
-import androidx.lifecycle.ViewModel
+import com.example.myapplication.MainComposeActivity
 import com.example.myapplication.R
+import com.example.myapplication.composeui.MyViewModel
 import com.example.myapplication.database.entities.model.User
 import com.example.myapplication.database.entities.repository.UserRepository
 import com.example.myapplication.datastore.DataStoreManager
 
 class UserProfileViewModel(
     private val userRepository: UserRepository
-) : ViewModel() {
+) : MyViewModel() {
     var userUiState by mutableStateOf(UserUiState())
         private set
 
@@ -22,43 +25,63 @@ class UserProfileViewModel(
         )
     }
 
-    suspend fun signIn(dataStoreManager: DataStoreManager): Boolean {
+    suspend fun signIn(dataStoreManager: DataStoreManager) {
         userUiState.details.passwordConfirm = userUiState.details.password
         var errorId: Int? = validateInput(userUiState.details)
+        runInScope(
+            actionSuccess = {
                 if (errorId == null) {
-            val overlap = userRepository.getUser(userUiState.details.login)
+                    val overlap: User? = userRepository.getUser(userUiState.details.login)
                     if (overlap == null || userUiState.details.password != overlap.password) {
                         errorId = R.string.err_04
+                    } else {
+                        dataStoreManager.setLogin(userUiState.details.login)
+                        Log.d("UserProfileViewModel", "sign in success")
                     }
                 }
                 userUiState = UserUiState(
                     details = userUiState.details,
                     errorId = errorId
                 )
-        if (errorId == null) {
-            dataStoreManager.setLogin(userUiState.details.login)
-            return true
-        }
-        return false
+            }, actionError = {
+                errorId = R.string.err_06
+                userUiState = UserUiState(
+                    details = userUiState.details,
+                    errorId = errorId
+                )
+            })
     }
 
-    suspend fun signUp(): Boolean {
+    suspend fun signUp() {
         var errorId: Int? = validateInput(userUiState.details)
+        runInScope(actionSuccess = {
             if (errorId == null) {
                 val overlap = userRepository.getUser(userUiState.details.login)
                 if (overlap != null) {
                     errorId = R.string.err_03
                 }
             }
+            if (errorId == null) {
+                userRepository.insertUser(userUiState.details.toUser())
+                val toast = Toast.makeText(
+                    MainComposeActivity.appContext,
+                    "Вы зарегистрированы",
+                    Toast.LENGTH_SHORT
+                )
+                toast.show()
+                errorId = 0
+            }
             userUiState = UserUiState(
                 details = userUiState.details,
                 errorId = errorId
             )
-        if (errorId == null) {
-            userRepository.insertUser(userUiState.details.toUser())
-            return true
-        }
-        return false
+        }, actionError = {
+            errorId = R.string.err_06
+            userUiState = UserUiState(
+                details = userUiState.details,
+                errorId = errorId
+            )
+        })
     }
 
     private fun validateInput(details: UserDetails = userUiState.details): Int? {

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

@@ -22,6 +22,9 @@ import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import com.example.myapplication.R
+import com.example.myapplication.api.ApiStatus
+import com.example.myapplication.composeui.ErrorPlaceholder
+import com.example.myapplication.composeui.LoadingPlaceholder
 import com.example.myapplication.database.entities.composeui.AppViewModelProvider
 import com.example.myapplication.ui.theme.PmudemoTheme
 import kotlinx.coroutines.launch
@@ -32,7 +35,8 @@ fun CinemaEdit(
     viewModel: CinemaEditViewModel = viewModel(factory = AppViewModelProvider.Factory),
 ) {
     val coroutineScope = rememberCoroutineScope()
-
+    when (viewModel.apiStatus) {
+        ApiStatus.DONE -> {
             CinemaEdit(
                 cinemaUiState = viewModel.cinemaUiState,
                 onClick = {
@@ -44,6 +48,13 @@ fun CinemaEdit(
                 onUpdate = viewModel::updateUiState,
             )
         }
+        ApiStatus.LOADING -> LoadingPlaceholder()
+        else -> ErrorPlaceholder(
+            message = viewModel.apiError,
+            onBack = { navController.popBackStack() }
+        )
+    }
+}
 
 @Composable
 private fun CinemaEdit(
@@ -100,7 +111,6 @@ private fun CinemaEdit(
         Button(
             onClick = onClick,
             enabled = cinemaUiState.isEntryValid,
-            shape = MaterialTheme.shapes.small,
             modifier = Modifier.fillMaxWidth()
         ) {
             Text(text = stringResource(R.string.Save_button))

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

@@ -9,7 +9,6 @@ import androidx.compose.material3.Button
 import androidx.compose.material3.DatePicker
 import androidx.compose.material3.DisplayMode
 import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.material3.TimePicker
@@ -24,6 +23,9 @@ import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
 import com.example.myapplication.R
+import com.example.myapplication.api.ApiStatus
+import com.example.myapplication.composeui.ErrorPlaceholder
+import com.example.myapplication.composeui.LoadingPlaceholder
 import com.example.myapplication.database.entities.composeui.AppViewModelProvider
 import kotlinx.coroutines.launch
 import org.threeten.bp.Instant
@@ -39,6 +41,8 @@ fun SessionEdit(
     viewModel: SessionEditViewModel = viewModel(factory = AppViewModelProvider.Factory),
 ) {
     val coroutineScope = rememberCoroutineScope()
+    when (viewModel.apiStatus) {
+        ApiStatus.DONE -> {
             SessionEdit(
                 sessionUiState = viewModel.sessionUiState,
                 onClick = {
@@ -51,6 +55,14 @@ fun SessionEdit(
             )
         }
 
+        ApiStatus.LOADING -> LoadingPlaceholder()
+        else -> ErrorPlaceholder(
+            message = viewModel.apiError,
+            onBack = { navController.popBackStack() }
+        )
+    }
+}
+
 fun Long.toLocalDate(): org.threeten.bp.LocalDate {
     val instant = Instant.ofEpochMilli(this)
     return instant.atZone(ZoneId.systemDefault()).toLocalDate()
@@ -140,7 +152,6 @@ private fun SessionEdit(
             Button(
                 onClick = onClick,
                 enabled = sessionUiState.isEntryValid,
-                shape = MaterialTheme.shapes.small,
                 modifier = Modifier.fillMaxWidth()
             ) {
                 Text(text = stringResource(R.string.Save_button))

app/src/main/java/com/example/myapplication/database/entities/dao/CinemaDao.kt

@@ -4,6 +4,7 @@ import androidx.paging.PagingSource
 import androidx.room.Dao
 import androidx.room.Delete
 import androidx.room.Insert
+import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import androidx.room.Update
 import com.example.myapplication.database.entities.model.Cinema
@@ -14,6 +15,7 @@ import kotlinx.coroutines.flow.Flow
 interface CinemaDao {
     @Query("select * from cinemas order by name")
     fun getAll(): PagingSource<Int, Cinema>
+
     @Query("select * from cinemas where cinemas.name like :name order by name collate nocase asc")
     fun getAll(name: String): PagingSource<Int, Cinema>
 
@@ -27,7 +29,7 @@ interface CinemaDao {
     )
     fun getByUid(cinemaId: Int?): Flow<Map<Cinema, List<SessionFromCinema>>>
 
-    @Insert
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
     suspend fun insert(vararg cinema: Cinema)
 
     @Update

app/src/main/java/com/example/myapplication/database/entities/dao/OrderDao.kt

@@ -4,6 +4,7 @@ import androidx.paging.PagingSource
 import androidx.room.Dao
 import androidx.room.Delete
 import androidx.room.Insert
+import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import androidx.room.Update
 import com.example.myapplication.database.entities.model.Order
@@ -23,7 +24,7 @@ interface OrderDao {
     )
     fun getByUid(orderId: Int?): List<SessionFromOrder>
 
-    @Insert
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
     suspend fun insert(vararg order: Order): List<Long>
 
     @Update

app/src/main/java/com/example/myapplication/database/entities/dao/SessionDao.kt

@@ -3,6 +3,7 @@ package com.example.myapplication.database.entities.dao
 import androidx.room.Dao
 import androidx.room.Delete
 import androidx.room.Insert
+import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import androidx.room.Update
 import com.example.myapplication.database.entities.model.Session
@@ -12,7 +13,7 @@ interface SessionDao {
     @Query("select * from sessions where sessions.uid = :uid")
     suspend fun getByUid(uid: Int): Session
 
-    @Insert
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
     suspend fun insert(vararg session: Session)
 
     @Update

app/src/main/java/com/example/myapplication/database/entities/dao/UserDao.kt

@@ -3,6 +3,7 @@ package com.example.myapplication.database.entities.dao
 import androidx.room.Dao
 import androidx.room.Delete
 import androidx.room.Insert
+import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import androidx.room.Update
 import com.example.myapplication.database.entities.model.SessionFromCart
@@ -27,7 +28,7 @@ interface UserDao {
     )
     suspend fun getCartByUid(userId: Int): List<SessionFromCart>
 
-    @Insert
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
     suspend fun insert(vararg user: User)
 
     @Update

app/src/main/java/com/example/myapplication/database/entities/dao/UserSessionCrossRefDao.kt

@@ -17,7 +17,7 @@ interface UserSessionCrossRefDao {
     suspend fun update(userSessionCrossRef: UserSessionCrossRef)
 
     @Delete
-    suspend fun delete(userSessionCrossRef: UserSessionCrossRef)
+    suspend fun delete(vararg userSessionCrossRef: UserSessionCrossRef)
 
     @Query("DELETE FROM users_sessions where users_sessions.user_id = :userId")
     suspend fun deleteByUserUid(userId: Int)

app/src/main/java/com/example/myapplication/database/entities/repository/OfflineCinemaRepository.kt

@@ -18,7 +18,7 @@ class OfflineCinemaRepository(private val cinemaDao: CinemaDao) : CinemaReposito
             pageSize = AppContainer.LIMIT,
             enablePlaceholders = false
         ),
-        pagingSourceFactory = cinemaDao::getAll
+        pagingSourceFactory = { cinemaDao.getAll(name) }
     ).flow
 
 

app/src/main/java/com/example/myapplication/database/entities/repository/OfflineOrderRepository.kt

@@ -4,6 +4,7 @@ import androidx.paging.Pager
 import androidx.paging.PagingConfig
 import androidx.paging.PagingData
 import androidx.paging.PagingSource
+import com.example.myapplication.LiveStore
 import com.example.myapplication.database.AppContainer
 import com.example.myapplication.database.entities.dao.OrderDao
 import com.example.myapplication.database.entities.model.Order
@@ -11,19 +12,21 @@ import com.example.myapplication.database.entities.model.SessionFromOrder
 import kotlinx.coroutines.flow.Flow
 
 class OfflineOrderRepository(private val orderDao: OrderDao) : OrderRepository {
-    override fun getAllOrders(userId: Int): Flow<PagingData<Order>> = Pager(
+    override fun getAllOrders(): Flow<PagingData<Order>> = Pager(
         config = PagingConfig(
             pageSize = AppContainer.LIMIT,
             enablePlaceholders = false
         ),
-        pagingSourceFactory = { orderDao.getAll(userId) }
+        pagingSourceFactory = { orderDao.getAll(LiveStore.user.value?.uid ?: 0) }
     ).flow
 
     override suspend fun getOrder(uid: Int): List<SessionFromOrder> = orderDao.getByUid(uid)
 
     override suspend fun insertOrder(order: Order): Long = orderDao.insert(order).first()
 
-    fun getAllOrdersPagingSource(userId: Int?): PagingSource<Int, Order> = orderDao.getAll(userId)
+    fun getAllOrdersPagingSource(): PagingSource<Int, Order> {
+        return orderDao.getAll(LiveStore.user.value?.uid ?: 0)
+    }
 
     suspend fun clearOrders() = orderDao.deleteAll()
 

app/src/main/java/com/example/myapplication/database/entities/repository/OfflineUserSessionRepository.kt

@@ -16,5 +16,8 @@ class OfflineUserSessionRepository(private val userSessionDao: UserSessionCrossR
 
     override suspend fun deleteUserSessions(userId: Int) = userSessionDao.deleteByUserUid(userId)
 
+    override suspend fun deleteUserSessions(userSessionCrossRefs: List<UserSessionCrossRef>) =
+        userSessionDao.delete(*userSessionCrossRefs.toTypedArray())
+
     suspend fun deleteSessionsByUid(sessionId: Int) = userSessionDao.deleteBySessionUid(sessionId)
 }

app/src/main/java/com/example/myapplication/database/entities/repository/OrderRepository.kt

@@ -6,7 +6,7 @@ import com.example.myapplication.database.entities.model.SessionFromOrder
 import kotlinx.coroutines.flow.Flow
 
 interface OrderRepository {
-    fun getAllOrders(userId: Int): Flow<PagingData<Order>>
+    fun getAllOrders(): Flow<PagingData<Order>>
     suspend fun getOrder(uid: Int): List<SessionFromOrder>
     suspend fun insertOrder(order: Order): Long
 }

app/src/main/java/com/example/myapplication/database/entities/repository/UserSessionRepository.kt

@@ -7,4 +7,5 @@ interface UserSessionRepository {
     suspend fun updateUserSession(userSessionCrossRef: UserSessionCrossRef)
     suspend fun deleteUserSession(userSessionCrossRef: UserSessionCrossRef)
     suspend fun deleteUserSessions(userId: Int)
+    suspend fun deleteUserSessions(userSessionCrossRefs: List<UserSessionCrossRef>)
 }

app/src/main/res/values/strings.xml

@@ -25,6 +25,7 @@
     <string name="err_03">Логин занят</string>
     <string name="err_04">Неверный логин или пароль</string>
     <string name="err_05">Не совпадают пароли</string>
+    <string name="err_06">Ошибка сети</string>
     <string name="back">Назад</string>
     <string name="loading">Загрузка…</string>
 </resources>

server/reportRouter.js

@@ -8,7 +8,7 @@ module.exports = (req, res, next) => {
 
   try {
     const { startDate, endDate } = req.query;
-    const { sessions, orders } = require('./data.json');
+    const { cinemas, sessions, orders } = require('./data.json');
 
     const start = new Date(startDate);
     const end = new Date(endDate);
@@ -42,8 +42,9 @@ module.exports = (req, res, next) => {
         };
       }, { totalTicketsSold: 0, revenue: 0 });
 
+      const cinema = cinemas.find(cinema => cinema.id === session.cinemaId)
       return {
-        cinema_name: relevantOrders[0].sessions[0].cinema.name,
+        cinema_name: cinema ? cinema.name : "Неизвестно",
         current_ticket_date_time: session.dateTime,
         current_ticket_price: session.price,
         max_ticket_quantity: session.maxCount,