Course work: implement full performance CRUD

app/build.gradle.kts

@@ -67,7 +67,8 @@ dependencies {
     implementation("androidx.compose.ui:ui")
     implementation("androidx.compose.ui:ui-graphics")
     implementation("androidx.compose.ui:ui-tooling-preview")
-    implementation("androidx.compose.material3:material3")
+    implementation("androidx.compose.material3:material3:1.1.2")
+    implementation("androidx.compose.material:material:1.4.3")
 
     // Room
     val room_version = "2.5.2"

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

@@ -60,6 +60,22 @@ interface MyServerService {
         @Body credentials: Credentials
     ): Token
 
+    @POST("api/performances")
+    suspend fun createPerformance(
+        @Body performance: PerformanceRemote,
+    )
+
+    @PUT("api/performances/{id}")
+    suspend fun updatePerformance(
+        @Path("id") id: Int,
+        @Body student: PerformanceRemote,
+    )
+
+    @DELETE("api/performances/{id}")
+    suspend fun deletePerformance(
+        @Path("id") id: Int,
+    )
+
     companion object {
         private const val BASE_URL = "http://10.0.2.2:8000/"
 

app/src/main/java/com/example/mobile_labs/api/models/PerformanceRemote.kt

@@ -40,4 +40,14 @@ suspend fun PerformanceRemote.toPerformanceWithPeople(service: MyServerService):
         service.getPerson(director_id).toPerson(),
         actorsList.toList()
         )
-}
+}
+
+fun Performance.toPerformanceRemote(): PerformanceRemote = PerformanceRemote(
+    performance_uid!!,
+    title,
+    description,
+    authorId!!,
+    directorId!!,
+    imageURL,
+    previewImageURL
+)

app/src/main/java/com/example/mobile_labs/api/performance/RestPerformanceRepository.kt

@@ -6,6 +6,7 @@ import androidx.paging.PagingConfig
 import androidx.paging.PagingData
 import com.example.mobile_labs.api.MyServerService
 import com.example.mobile_labs.api.models.toPerformance
+import com.example.mobile_labs.api.models.toPerformanceRemote
 import com.example.mobile_labs.api.models.toPerformanceWithPeople
 import com.example.mobile_labs.api.people.RestPersonRepository
 import com.example.mobile_labs.common.AppDataContainer
@@ -50,4 +51,16 @@ class RestPerformanceRepository(
 
     override suspend fun getPerformance(uid: Int): PerformanceWithPeople =
         service.getPerformance(uid).toPerformanceWithPeople(service)
+
+    override suspend fun insertPerformance(performance: Performance) {
+        service.createPerformance(performance.toPerformanceRemote())
+    }
+
+    override suspend fun updatePerformance(performance: Performance) {
+        service.updatePerformance(performance.performance_uid!!, performance.toPerformanceRemote())
+    }
+
+    override suspend fun deletePerformance(performance: Performance) {
+        service.deletePerformance(performance.performance_uid !!)
+    }
 }

app/src/main/java/com/example/mobile_labs/common/AppContainer.kt

@@ -64,6 +64,6 @@ class AppDataContainer(val context: Context) : AppContainer {
 
     companion object {
         const val TIMEOUT = 5000L
-        const val LIMIT = 3
+        const val LIMIT = 20
     }
 }

app/src/main/java/com/example/mobile_labs/common/AppViewModelProvider.kt

@@ -8,7 +8,9 @@ import androidx.lifecycle.viewmodel.viewModelFactory
 import com.example.mobile_labs.TheatreApplication
 import com.example.mobile_labs.ui.event.list.EventListViewModel
 import com.example.mobile_labs.ui.login.LoginViewModel
+import com.example.mobile_labs.ui.performance.list.AdminPerformanceListViewModel
 import com.example.mobile_labs.ui.performance.list.PerformanceListViewModel
+import com.example.mobile_labs.ui.performance.view.AdminPerformanceViewModel
 import com.example.mobile_labs.ui.performance.view.PerformanceViewModel
 import com.example.mobile_labs.ui.person.list.PeopleListViewModel
 
@@ -29,6 +31,12 @@ object AppViewModelProvider {
         initializer {
             LoginViewModel()
         }
+        initializer {
+            AdminPerformanceListViewModel(theatreApplication().container.performanceRestRepository)
+        }
+        initializer {
+            AdminPerformanceViewModel(this.createSavedStateHandle(), theatreApplication().container.performanceRestRepository)
+        }
     }
 }
 

app/src/main/java/com/example/mobile_labs/common/PerformanceRepository.kt

@@ -8,4 +8,7 @@ import kotlinx.coroutines.flow.Flow
 interface PerformanceRepository {
     fun getAllPerformances(): Flow<PagingData<Performance>>
     suspend fun getPerformance(uid: Int): PerformanceWithPeople
+    suspend fun insertPerformance(performance: Performance)
+    suspend fun updatePerformance(performance: Performance)
+    suspend fun deletePerformance(performance: Performance)
 }

app/src/main/java/com/example/mobile_labs/database/performance/repository/OfflinePerformanceRepository.kt

@@ -24,11 +24,11 @@ class OfflinePerformanceRepository(private val performanceDao: PerformanceDao) :
     ).flow
     override suspend fun getPerformance(uid: Int): PerformanceWithPeople = performanceDao.getByUid(uid).first();
 
-    suspend fun insertPerformance(performance: Performance) = performanceDao.insert(performance);
+    override suspend fun insertPerformance(performance: Performance) = performanceDao.insert(performance);
 
-    suspend fun updatePerformance(performance: Performance) = performanceDao.update(performance);
+    override suspend fun updatePerformance(performance: Performance) = performanceDao.update(performance);
 
-    suspend fun deletePerformance(performance: Performance) = performanceDao.delete(performance);
+    override suspend fun deletePerformance(performance: Performance) = performanceDao.delete(performance);
 
     suspend fun clearPerformances() = performanceDao.deleteAll()
 

app/src/main/java/com/example/mobile_labs/ui/navigation/MainNavbar.kt

@@ -1,6 +1,7 @@
 package com.example.mobile_labs.ui.navigation
 
 import android.content.res.Configuration
+import android.util.Log
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material.icons.Icons
@@ -37,7 +38,9 @@ import com.example.mobile_labs.api.MyServerService
 import com.example.mobile_labs.ui.about.About
 import com.example.mobile_labs.ui.event.list.EventList
 import com.example.mobile_labs.ui.login.Login
+import com.example.mobile_labs.ui.performance.list.AdminPerformanceList
 import com.example.mobile_labs.ui.performance.list.PerformanceList
+import com.example.mobile_labs.ui.performance.view.AdminPerformanceView
 import com.example.mobile_labs.ui.performance.view.PerformanceView
 import com.example.mobile_labs.ui.person.list.PeopleList
 
@@ -79,8 +82,26 @@ fun Navbar(
     modifier: Modifier = Modifier
 ) {
     NavigationBar(modifier) {
-        Screen.bottomBarItems.forEach { screen ->
+        if (MyServerService.getToken().isBlank()) {
-            if (MyServerService.getToken().isBlank() || screen.route !== "login") {
+            Screen.bottomBarItems.forEach { screen ->
+                NavigationBarItem(
+                    icon = { Icon(screen.icon, contentDescription = null) },
+                    label = { Text(stringResource(screen.resourceId)) },
+                    selected = currentDestination?.hierarchy?.any { it.route == screen.route } == true,
+                    onClick = {
+                        navController.navigate(screen.route) {
+                            popUpTo(navController.graph.findStartDestination().id) {
+                                saveState = false
+                            }
+                            launchSingleTop = true
+                            restoreState = false
+                        }
+                    }
+                )
+            }
+        }
+        else {
+            Screen.adminBottomBarItems.forEach { screen ->
                 NavigationBarItem(
                     icon = { Icon(screen.icon, contentDescription = null) },
                     label = { Text(stringResource(screen.resourceId)) },
@@ -113,7 +134,12 @@ fun Navhost(
     ) {
         composable(Screen.Schedule.route) { EventList(navController) }
         composable(Screen.Repertoire.route) {
-            PerformanceList(navController)
+            if (MyServerService.getToken().isNotBlank()) {
+                AdminPerformanceList(navController)
+            }
+            else {
+                PerformanceList(navController)
+            }
         }
         composable(Screen.PeopleList.route) { PeopleList() }
         composable(Screen.About.route) {  About() }
@@ -124,7 +150,12 @@ fun Navhost(
             Screen.PerformanceView.route,
             arguments = listOf(navArgument("id") { type = NavType.IntType })
         ) { backStackEntry ->
-            backStackEntry.arguments?.let { PerformanceView() }
+            if (MyServerService.getToken().isNotBlank()) {
+                AdminPerformanceView(navController)
+            }
+            else {
+                backStackEntry.arguments?.let { PerformanceView() }
+            }
         }
     }
 }

app/src/main/java/com/example/mobile_labs/ui/navigation/Screen.kt

@@ -38,16 +38,16 @@ enum class Screen(
     );
 
     companion object {
-        val bottomBarItems = if (MyServerService.getToken().isBlank()) listOf(
+        val bottomBarItems = listOf(
             Schedule,
             Repertoire,
             PeopleList,
             About,
             Login
-        ) else listOf(
+        )
-            Schedule,
+
+        val adminBottomBarItems = listOf(
             Repertoire,
-            PeopleList,
             About,
         )
 

app/src/main/java/com/example/mobile_labs/ui/performance/list/AdminPerformanceList.kt

@@ -0,0 +1,261 @@
+package com.example.mobile_labs.ui.performance.list
+
+import android.content.res.Configuration
+import android.util.Log
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.core.spring
+import androidx.compose.animation.fadeOut
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+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.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.DismissDirection
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.DismissState
+import androidx.compose.material3.DismissValue
+import androidx.compose.material3.FloatingActionButton
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.SwipeToDismiss
+import androidx.compose.material3.rememberDismissState
+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.rememberCoroutineScope
+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.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.zIndex
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavController
+import androidx.paging.PagingData
+import androidx.paging.compose.LazyPagingItems
+import androidx.paging.compose.collectAsLazyPagingItems
+import androidx.paging.compose.itemContentType
+import androidx.paging.compose.itemKey
+import coil.compose.AsyncImage
+import com.example.mobile_labs.R
+import com.example.mobile_labs.api.MyServerService
+import com.example.mobile_labs.database.performance.model.Performance
+import com.example.mobile_labs.common.AppViewModelProvider
+import com.example.mobile_labs.ui.navigation.Screen
+import com.example.mobile_labs.ui.theme.Mobile_LabsTheme
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+
+@Composable
+fun AdminPerformanceList(
+    navController: NavController,
+    viewModel: AdminPerformanceListViewModel = viewModel(factory = AppViewModelProvider.Factory)
+) {
+    val coroutineScope = rememberCoroutineScope()
+    val performanceListUiState = viewModel.performanceListUiState.collectAsLazyPagingItems()
+    Scaffold(
+        topBar = {},
+        floatingActionButton = {
+            FloatingActionButton(
+                onClick = {
+                    val route = Screen.PerformanceView.route.replace("{id}", 0.toString())
+                    navController.navigate(route)
+                },
+            ) {
+                Icon(Icons.Filled.Add, "Добавить")
+            }
+        }
+    ) { innerPadding ->
+        PerformanceList(
+            modifier = Modifier
+                .padding(innerPadding)
+                .fillMaxSize(),
+            performanceList = performanceListUiState,
+            onClick = { uid: Int ->
+                val route = Screen.PerformanceView.route.replace("{id}", uid.toString())
+                navController.navigate(route)
+            },
+            onSwipe = { performance: Performance ->
+                coroutineScope.launch {
+                    viewModel.deleteStudent(performance)
+                }
+            }
+        )
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun DismissBackground(dismissState: DismissState) {
+    val color = when (dismissState.dismissDirection) {
+        DismissDirection.StartToEnd -> Color.Transparent
+        DismissDirection.EndToStart -> Color(0xFFFF1744)
+        null -> Color.Transparent
+    }
+    val direction = dismissState.dismissDirection
+
+    Row(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(color)
+            .padding(12.dp, 8.dp),
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.End
+    ) {
+        if (direction == DismissDirection.EndToStart) {
+            Icon(
+                Icons.Default.Delete,
+                contentDescription = "delete",
+                tint = Color.White
+            )
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun SwipeToDelete(
+    dismissState: DismissState,
+    performance: Performance,
+    onClick: (uid: Int) -> Unit
+) {
+    SwipeToDismiss(
+        modifier = Modifier.zIndex(1f),
+        state = dismissState,
+        directions = setOf(
+            DismissDirection.EndToStart
+        ),
+        background = {
+            DismissBackground(dismissState)
+        },
+        dismissContent = {
+            PerformanceListItem(performance = performance,
+                modifier = Modifier
+                    .padding(vertical = 7.dp)
+                    .clickable { onClick(performance.performance_uid!!) })
+        }
+    )
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun PerformanceList(
+    modifier: Modifier = Modifier,
+    performanceList: LazyPagingItems<Performance>,
+    onClick: (uid: Int) -> Unit,
+    onSwipe: (performance: Performance) -> Unit
+) {
+    Column(
+        modifier = modifier
+    ) {
+        if (performanceList.itemCount == 0) {
+            Text(
+                text = stringResource(R.string.performance_missing_description),
+                textAlign = TextAlign.Center,
+                style = MaterialTheme.typography.titleLarge
+            )
+        } else {
+            LazyColumn(modifier = Modifier.padding(all = 10.dp)) {
+                items(
+                    count = performanceList.itemCount,
+                    key = performanceList.itemKey(),
+                    contentType = performanceList.itemContentType()
+                ) { index ->
+                    val performance = performanceList[index]
+                    performance?.let {
+                        var show by remember { mutableStateOf(true) }
+                        val dismissState = rememberDismissState(
+                            confirmValueChange = {
+                                if (it == DismissValue.DismissedToStart ||
+                                    it == DismissValue.DismissedToEnd
+                                ) {
+                                    show = false
+                                    true
+                                } else false
+                            }, positionalThreshold = { 200.dp.toPx() }
+                        )
+
+                        AnimatedVisibility(
+                            show, exit = fadeOut(spring())
+                        ) {
+                            SwipeToDelete(
+                                dismissState = dismissState,
+                                performance = performance,
+                                onClick = onClick
+                            )
+                        }
+
+                        LaunchedEffect(show) {
+                            if (!show) {
+                                delay(800)
+                                onSwipe(performance)
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun PerformanceListItem(
+    performance: Performance,
+    modifier: Modifier = Modifier,
+) {
+    Card(
+        modifier = modifier.fillMaxWidth(),
+        elevation = CardDefaults.cardElevation(defaultElevation = 2.dp)
+    ) {
+        Column(
+            modifier = modifier.padding(all = 10.dp)
+        ) {
+            AsyncImage(model = performance.imageURL, contentDescription = "")
+            Button(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(all = 10.dp),
+                onClick = { }) {
+                Text(performance.title)
+            }
+        }
+    }
+}
+
+@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 AdminSchedulePreview() {
+    Mobile_LabsTheme {
+        Surface(
+            color = MaterialTheme.colorScheme.background
+        ) {
+            PerformanceList(
+                performanceList = MutableStateFlow(
+                    PagingData.empty<Performance>()
+                ).collectAsLazyPagingItems(),
+                onClick = {},
+                onSwipe = {}
+            )
+        }
+    }
+}

app/src/main/java/com/example/mobile_labs/ui/performance/list/AdminPerformanceListViewModel.kt

@@ -0,0 +1,17 @@
+package com.example.mobile_labs.ui.performance.list
+
+import androidx.lifecycle.ViewModel
+import androidx.paging.PagingData
+import com.example.mobile_labs.common.PerformanceRepository
+import com.example.mobile_labs.database.performance.model.Performance
+import kotlinx.coroutines.flow.Flow
+
+class AdminPerformanceListViewModel(
+    private val performanceRepository: PerformanceRepository
+) : ViewModel() {
+    val performanceListUiState: Flow<PagingData<Performance>> = performanceRepository.getAllPerformances()
+
+    suspend fun deleteStudent(performance: Performance) {
+        performanceRepository.deletePerformance(performance)
+    }
+}

app/src/main/java/com/example/mobile_labs/ui/performance/view/AdminPerformanceView.kt

@@ -0,0 +1,129 @@
+package com.example.mobile_labs.ui.performance.view
+
+import android.content.res.Configuration
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.Button
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavController
+import coil.compose.AsyncImage
+import com.example.mobile_labs.R
+import com.example.mobile_labs.common.AppViewModelProvider
+import com.example.mobile_labs.ui.theme.Mobile_LabsTheme
+import kotlinx.coroutines.launch
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun AdminPerformanceView(
+    navController: NavController,
+    viewModel: AdminPerformanceViewModel = viewModel(factory = AppViewModelProvider.Factory)
+) {
+    val coroutineScope = rememberCoroutineScope()
+    PerformanceEdit(
+        performanceUiState = viewModel.performanceUiState,
+        onClick = {
+            coroutineScope.launch {
+                viewModel.savePerformance()
+                navController.popBackStack()
+            }
+        },
+        onUpdate = viewModel::updateUiState,
+    )
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun PerformanceEdit(
+    performanceUiState: AdminPerformanceUiState,
+    onClick: () -> Unit,
+    onUpdate: (AdminPerformanceDetails) -> Unit,
+) {
+    Column(
+        Modifier
+            .fillMaxWidth()
+            .padding(all = 10.dp)
+    ) {
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = performanceUiState.performanceDetails.title,
+            onValueChange = { onUpdate(performanceUiState.performanceDetails.copy(title = it)) },
+            label = {Text("Название")},
+            singleLine = true
+        )
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = performanceUiState.performanceDetails.description,
+            onValueChange = { onUpdate(performanceUiState.performanceDetails.copy(description = it)) },
+            label = {Text("Описание")},
+            singleLine = true
+        )
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = performanceUiState.performanceDetails.imageURL,
+            onValueChange = { onUpdate(performanceUiState.performanceDetails.copy(imageURL = it)) },
+            label = { Text("URL изображения") },
+            singleLine = true,
+        )
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = performanceUiState.performanceDetails.previewImageUrl,
+            onValueChange = { onUpdate(performanceUiState.performanceDetails.copy(previewImageUrl = it)) },
+            label = {Text("URL превью")},
+            singleLine = true
+        )
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = performanceUiState.performanceDetails.authorId.toString(),
+            onValueChange = { onUpdate(performanceUiState.performanceDetails.copy(authorId = it.toInt())) },
+            label = {Text("Автор")},
+            singleLine = true,
+            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Phone)
+        )
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = performanceUiState.performanceDetails.directorId.toString(),
+            onValueChange = { onUpdate(performanceUiState.performanceDetails.copy(directorId = it.toInt())) },
+            label = {Text("Режиссер")},
+            singleLine = true,
+            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Phone)
+        )
+        Button(
+            onClick = onClick,
+            enabled = performanceUiState.isEntryValid,
+            shape = MaterialTheme.shapes.small,
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            Text(text = "Сохранить")
+        }
+    }
+}
+
+@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 AdminPerformanceViewPreview() {
+    Mobile_LabsTheme {
+        Surface(
+            color = MaterialTheme.colorScheme.background
+        ) {
+            PerformanceView()
+        }
+    }
+}

app/src/main/java/com/example/mobile_labs/ui/performance/view/AdminPerformanceViewModel.kt

@@ -0,0 +1,103 @@
+package com.example.mobile_labs.ui.performance.view
+
+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.mobile_labs.database.performance.model.PerformanceWithPeople
+import com.example.mobile_labs.common.PerformanceRepository
+import com.example.mobile_labs.database.performance.model.Performance
+import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+
+class AdminPerformanceViewModel(
+    savedStateHandle: SavedStateHandle,
+    private val performanceRepository: PerformanceRepository
+) : ViewModel() {
+
+    var performanceUiState by mutableStateOf(AdminPerformanceUiState())
+        private set
+
+    private val performanceUid: Int = checkNotNull(savedStateHandle["id"])
+
+    init {
+        viewModelScope.launch {
+            if (performanceUid > 0) {
+                performanceUiState = performanceRepository.getPerformance(performanceUid)
+                    .toUiStateAdmin()
+            }
+        }
+    }
+
+    fun updateUiState(performanceDetails: AdminPerformanceDetails) {
+        performanceUiState = AdminPerformanceUiState(
+            performanceDetails = performanceDetails,
+            isEntryValid = validateInput(performanceDetails)
+        )
+    }
+
+    suspend fun savePerformance() {
+        if (validateInput()) {
+            if (performanceUid > 0) {
+                performanceRepository.updatePerformance(
+                    performanceUiState.performanceDetails.toPerformance(performanceUid)
+                )
+            } else {
+                performanceRepository.insertPerformance(
+                    performanceUiState.performanceDetails.toPerformance()
+                )
+            }
+        }
+    }
+
+    private fun validateInput(uiState: AdminPerformanceDetails = performanceUiState.performanceDetails): Boolean {
+        return with(uiState) {
+            title.isNotBlank()
+                    && description.isNotBlank()
+        }
+    }
+}
+
+data class AdminPerformanceUiState(
+    val performanceDetails: AdminPerformanceDetails = AdminPerformanceDetails(),
+    val isEntryValid: Boolean = false
+)
+
+data class AdminPerformanceDetails(
+    val title: String = "",
+    val authorName: String = "",
+    val actorsList: String = "",
+    val imageURL: String = "",
+    val description: String = "",
+    val authorId: Int = 0,
+    val directorId: Int = 0,
+    val previewImageUrl: String = "",
+)
+
+fun PerformanceWithPeople.toAdminDetails(): AdminPerformanceDetails = AdminPerformanceDetails(
+    title = performance.title,
+    authorName = String.format("%s %s", author.last_name, author.first_name),
+    actorsList = buildString { for (actor in actors) append(actor.last_name + " " + actor.first_name + "\n") },
+    imageURL = performance.imageURL,
+    description = performance.description,
+    authorId = performance.authorId!!,
+    directorId = performance.directorId!!,
+    previewImageUrl = performance.previewImageURL,
+)
+
+fun PerformanceWithPeople.toUiStateAdmin(): AdminPerformanceUiState = AdminPerformanceUiState(
+    performanceDetails = this.toAdminDetails(),
+)
+
+fun AdminPerformanceDetails.toPerformance(uid: Int = 0): Performance = Performance(
+    performance_uid = uid,
+    title = title,
+    authorId = authorId,
+    directorId = directorId,
+    imageURL = imageURL,
+    description = description,
+    previewImageURL = previewImageUrl
+)