поиск и эдиты

.idea/deploymentTargetDropDown.xml

@@ -0,0 +1,17 @@
+<?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/api/ApiStatus.kt

@@ -0,0 +1,3 @@
+package com.example.myapplication.api
+
+enum class ApiStatus { LOADING, ERROR, DONE }

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

@@ -1,13 +1,18 @@
 package com.example.myapplication.composeui
 
-import androidx.lifecycle.ViewModel
 import com.example.myapplication.database.entities.model.User
 import com.example.myapplication.database.entities.repository.UserRepository
 
 class AuthenticatorViewModel(
     private val userRepository: UserRepository
-) : ViewModel() {
+) : MyViewModel() {
     suspend fun findUserByLogin(login: String): User? {
-        return userRepository.getUser(login)
+        var user: User? = null
+        runInScope(
+            actionSuccess = {
+                user = userRepository.getUser(login)
+            }
+        )
+        return user
     }
 }

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

@@ -0,0 +1,48 @@
+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.lifecycle.viewModelScope
+import com.example.myapplication.api.ApiStatus
+import kotlinx.coroutines.launch
+import retrofit2.HttpException
+import java.io.IOException
+
+open class MyViewModel : ViewModel() {
+    var apiStatus by mutableStateOf(ApiStatus.DONE)
+        private set
+
+    var apiError by mutableStateOf("")
+        private set
+
+    fun runInScope(
+        actionSuccess: suspend () -> Unit,
+        actionError: suspend () -> Unit
+    ) {
+        viewModelScope.launch {
+            apiStatus = ApiStatus.LOADING
+            runCatching {
+                actionSuccess()
+                apiStatus = ApiStatus.DONE
+                apiError = ""
+            }.onFailure { e: Throwable ->
+                when (e) {
+                    is IOException,
+                    is HttpException -> {
+                        actionError()
+                        apiStatus = ApiStatus.ERROR
+                        apiError = e.localizedMessage ?: e.toString()
+                    }
+
+                    else -> throw e
+                }
+            }
+        }
+    }
+
+    fun runInScope(actionSuccess: suspend () -> Unit) {
+        runInScope(actionSuccess, actionError = {})
+    }
+}

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

@@ -0,0 +1,96 @@
+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
+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
+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
+fun ErrorPlaceholder(message: String, onBack: () -> Unit) {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(10.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(
+            modifier = Modifier.fillMaxWidth(),
+            textAlign = TextAlign.Center,
+            fontSize = TextUnit(value = 20F, type = TextUnitType.Sp),
+            text = message,
+            color = Color(0xFFFF1744)
+        )
+        Spacer(modifier = Modifier.padding(bottom = 10.dp))
+        Button(
+            modifier = Modifier.fillMaxWidth(),
+            onClick = { onBack() }
+        ) {
+            Text(stringResource(id = R.string.back))
+        }
+    }
+}
+
+@Composable
+fun LoadingPlaceholder() {
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(10.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(
+            modifier = Modifier.fillMaxWidth(),
+            textAlign = TextAlign.Center,
+            fontSize = TextUnit(value = 25F, type = TextUnitType.Sp),
+            text = stringResource(id = R.string.loading)
+        )
+    }
+}
+
+@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/database/entities/composeui/CinemaListViewModel.kt

@@ -3,11 +3,11 @@ 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.ViewModel
 import androidx.lifecycle.viewModelScope
 import androidx.paging.PagingData
 import androidx.paging.cachedIn
 import com.example.myapplication.LiveStore
+import com.example.myapplication.composeui.MyViewModel
 import com.example.myapplication.database.entities.model.Cinema
 import com.example.myapplication.database.entities.repository.CinemaRepository
 import kotlinx.coroutines.flow.Flow
@@ -15,14 +15,14 @@ import kotlinx.coroutines.flow.emptyFlow
 
 class CinemaListViewModel(
     private val cinemaRepository: CinemaRepository
-) : ViewModel() {
+) : MyViewModel() {
-    var cinemaPagingFlow by mutableStateOf(ProductPagingFlowState())
+    var cinemaPagingFlow by mutableStateOf(CinemaPagingFlowState())
         private set
 
     fun refresh() {
         val name = "%${LiveStore.searchRequest.value}%"
         val pagingSource = cinemaRepository.getAllCinemas(name)
-        cinemaPagingFlow = ProductPagingFlowState(pagingSource.cachedIn(viewModelScope))
+        cinemaPagingFlow = CinemaPagingFlowState(pagingSource.cachedIn(viewModelScope))
     }
 
     suspend fun deleteCinema(cinema: Cinema) {
@@ -30,6 +30,6 @@ class CinemaListViewModel(
     }
 }
 
-data class ProductPagingFlowState(
+data class CinemaPagingFlowState(
     val flow: Flow<PagingData<Cinema>> = emptyFlow(),
 )

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

@@ -4,29 +4,32 @@ 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 androidx.lifecycle.viewModelScope
 import com.example.myapplication.database.entities.model.Cinema
 import com.example.myapplication.database.entities.model.CinemaWithSessions
 import com.example.myapplication.database.entities.model.SessionFromCinema
 import com.example.myapplication.database.entities.repository.CinemaRepository
-import kotlinx.coroutines.launch
 
 class CinemaEditViewModel(
     savedStateHandle: SavedStateHandle,
     private val cinemaRepository: CinemaRepository
-) : ViewModel() {
+) : MyViewModel() {
     var cinemaUiState by mutableStateOf(CinemaUiState())
         private set
 
     private val cinemaUid: Int = checkNotNull(savedStateHandle["id"])
 
     init {
-        viewModelScope.launch {
         if (cinemaUid > 0) {
+            runInScope(
+                actionSuccess = {
                     cinemaUiState = cinemaRepository.getCinema(cinemaUid)
                         .toUiState(true)
+                },
+                actionError = {
+                    cinemaUiState = CinemaUiState()
                 }
+            )
         }
     }
 
@@ -39,12 +42,16 @@ class CinemaEditViewModel(
 
     suspend fun saveCinema() {
         if (validateInput()) {
+            runInScope(
+                actionSuccess = {
                     if (cinemaUid > 0) {
                         cinemaRepository.updateCinema(cinemaUiState.cinemaDetails.toCinema(cinemaUid))
                     } else {
                         cinemaRepository.insertCinema(cinemaUiState.cinemaDetails.toCinema())
                     }
                 }
+            )
+        }
     }
 
     private fun validateInput(uiState: CinemaDetails = cinemaUiState.cinemaDetails): Boolean {

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

@@ -4,17 +4,15 @@ 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 androidx.lifecycle.viewModelScope
 import com.example.myapplication.database.entities.model.Session
 import com.example.myapplication.database.entities.repository.SessionRepository
-import kotlinx.coroutines.launch
 import org.threeten.bp.LocalDateTime
 
 class SessionEditViewModel(
     savedStateHandle: SavedStateHandle,
     private val sessionRepository: SessionRepository
-) : ViewModel() {
+) : MyViewModel() {
     var sessionUiState by mutableStateOf(SessionUiState())
         private set
 
@@ -22,11 +20,16 @@ class SessionEditViewModel(
     private val cinemaUid: Int = checkNotNull(savedStateHandle["cinemaId"])
 
     init {
-        viewModelScope.launch {
         if (sessionUid > 0) {
+            runInScope(
+                actionSuccess = {
                     sessionUiState = sessionRepository.getSession(sessionUid)
                         .toUiState(true)
+                },
+                actionError = {
+                    sessionUiState = SessionUiState()
                 }
+            )
         }
     }
 
@@ -39,6 +42,8 @@ class SessionEditViewModel(
 
     suspend fun saveSession() {
         if (validateInput()) {
+            runInScope(
+                actionSuccess = {
                     if (cinemaUid > 0)
                         if (sessionUid > 0) {
                             sessionRepository.updateSession(
@@ -53,6 +58,8 @@ class SessionEditViewModel(
                             )
                         }
                 }
+            )
+        }
     }
 
     private fun validateInput(uiState: SessionDetails = sessionUiState.sessionDetails): Boolean {

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

@@ -25,4 +25,6 @@
     <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="back">Назад</string>
+    <string name="loading">Загрузка…</string>
 </resources>