Лаб 4: 0_o

app/build.gradle.kts

@@ -2,6 +2,7 @@ plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
     id ("kotlin-kapt")
+    id("com.google.dagger.hilt.android")
 }
 
 android {
@@ -76,4 +77,15 @@ dependencies {
     implementation ("androidx.room:room-runtime:2.5.0") // Библиотека "Room"
     kapt ("androidx.room:room-compiler:2.5.0") // Кодогенератор
     implementation ("androidx.room:room-ktx:2.5.0")
+
+    // lab4
+    implementation ("com.google.dagger:hilt-android:2.44")
+    kapt ("com.google.dagger:hilt-android-compiler:2.44")
+    implementation("androidx.hilt:hilt-navigation-compose:1.0.0")
+    implementation ("androidx.compose.runtime:runtime-livedata:1.0.0-beta01")
+    implementation ("androidx.datastore:datastore-preferences:1.0.0")
+
+    implementation ("androidx.paging:paging-runtime-ktx:3.2.1")
+    implementation ("androidx.paging:paging-compose:3.2.1")
+    implementation("androidx.room:room-paging:2.5.0")
 }

app/src/main/AndroidManifest.xml

@@ -3,6 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools">
 
     <application
+        android:name=".MobileApp"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"

app/src/main/java/com/example/mobileapp/AppModule.kt

@@ -0,0 +1,65 @@
+package com.example.mobileapp
+
+import android.app.Application
+import androidx.room.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import androidx.sqlite.db.SupportSQLiteDatabase
+import com.example.mobileapp.db.AppDatabase
+import com.example.mobileapp.repositories.CategoryRepository
+import com.example.mobileapp.repositories.OrderProductRepository
+import com.example.mobileapp.repositories.OrderRepository
+import com.example.mobileapp.repositories.ProductRepository
+import com.example.mobileapp.repositories.RoleRepository
+import com.example.mobileapp.repositories.StatusRepository
+import com.example.mobileapp.repositories.UserRepository
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object AppModule {
+    @Provides
+    @Singleton
+    fun provideDatabase(app: Application) : AppDatabase {
+        return Room.databaseBuilder(
+            app,
+            AppDatabase::class.java,
+            AppDatabase.DB_NAME
+        )
+            .fallbackToDestructiveMigration()
+            .build()
+    }
+
+    @Provides
+    @Singleton
+    fun provideCategoryRepository(db: AppDatabase) = CategoryRepository(db.categoryDao())
+
+    @Provides
+    @Singleton
+    fun provideOrderProductRepository(db: AppDatabase) = OrderProductRepository(db.orderProductDao())
+
+    @Provides
+    @Singleton
+    fun provideOrderRepository(db: AppDatabase) = OrderRepository(db.orderDao())
+
+    @Provides
+    @Singleton
+    fun provideProductRepository(db: AppDatabase) = ProductRepository(db.productDao())
+
+    @Provides
+    @Singleton
+    fun provideRoleRepository(db: AppDatabase) = RoleRepository(db.roleDao())
+
+    @Provides
+    @Singleton
+    fun provideStatusRepository(db: AppDatabase) = StatusRepository(db.statusDao())
+
+    @Provides
+    @Singleton
+    fun provideUserRepository(db: AppDatabase) = UserRepository(db.userDao())
+}

app/src/main/java/com/example/mobileapp/MainActivity.kt

@@ -3,22 +3,10 @@ package com.example.mobileapp
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.ui.platform.LocalContext
-import com.example.mobileapp.db.AppDatabase
-import com.example.mobileapp.models.Category
-import com.example.mobileapp.models.OrderWithProducts
-import com.example.mobileapp.models.Product
-import com.example.mobileapp.models.Role
-import com.example.mobileapp.models.Status
-import com.example.mobileapp.models.User
 import com.example.mobileapp.navigation.AppNavigation
-import com.example.mobileapp.navigation.listOfAdminNavItems
+import dagger.hilt.android.AndroidEntryPoint
-import com.example.mobileapp.navigation.listOfUserNavItems
-import com.example.mobileapp.navigation.listOfWorkerNavItems
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 
+@AndroidEntryPoint
 class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)

app/src/main/java/com/example/mobileapp/MobileApp.kt

@@ -0,0 +1,11 @@
+package com.example.mobileapp
+
+import android.app.Application
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class MobileApp : Application() {
+    override fun onCreate() {
+        super.onCreate()
+    }
+}

app/src/main/java/com/example/mobileapp/PreferencesManager.kt

@@ -0,0 +1,23 @@
+package com.example.mobileapp
+
+import android.content.Context
+import android.content.SharedPreferences
+
+class PreferencesManager(context: Context) {
+    private val sharedPreferences: SharedPreferences =
+        context.getSharedPreferences("MyPrefs", Context.MODE_PRIVATE)
+
+    fun saveData(key: String, value: String) {
+        val editor = sharedPreferences.edit()
+        editor.putString(key, value)
+        editor.apply()
+    }
+
+    fun getData(key: String, defaultValue: String): String {
+        return sharedPreferences.getString(key, defaultValue) ?: defaultValue
+    }
+
+    fun deleteData(key: String) {
+        sharedPreferences.edit().remove(key).apply()
+    }
+}

app/src/main/java/com/example/mobileapp/dao/CategoryDao.kt

@@ -2,6 +2,7 @@ package com.example.mobileapp.dao
 import androidx.room.*
 import com.example.mobileapp.models.*
 import kotlinx.coroutines.flow.Flow
+import androidx.paging.PagingSource
 
 @Dao
 interface CategoryDao {
@@ -17,8 +18,7 @@ interface CategoryDao {
     @Query("select * from category where category.id = :id")
     fun getById(id: Int) : Flow<Category>
     @Query("select * from category where category.name = :name")
-    fun getByName(name: String) : Flow<CategoryWithProducts>
+    fun getByName(name: String) : Flow<Category>
+
 
-    @Query("select * from category")
-    fun getCategoryWithProducts() : Flow<List<CategoryWithProducts>>
 }

app/src/main/java/com/example/mobileapp/dao/OrderDao.kt

@@ -1,4 +1,5 @@
 package com.example.mobileapp.dao
+import androidx.paging.PagingSource
 import androidx.room.*
 import com.example.mobileapp.models.*
 import kotlinx.coroutines.flow.Flow
@@ -6,7 +7,7 @@ import kotlinx.coroutines.flow.Flow
 @Dao
 interface OrderDao {
     @Insert
-    suspend fun insert(order: Order)
+    suspend fun insert(order: Order) : Long
     @Update
     suspend fun update(order: Order)
     @Delete
@@ -14,14 +15,14 @@ interface OrderDao {
 
     @Query("select * from `order`")
     fun getAll() : Flow<List<OrderWithProducts>>
-    @Query("select * from `order` where `order`.`user_id` =:id")
+    @Query("select * from `order` where `order`.`id` =:id")
-    fun getById(id: Int): Flow<List<OrderWithProducts>>
+    fun getById(id: Int): Flow<OrderWithProducts>
-    @Query("select * from `order` where `order`.`user_id` =:userId and `order`.`status_id` != 1 and `order`.`status_id` != 4")
+    @Query("select * from `order` where (`order`.`user_id` =:userId and `order`.`status_id` != 1 and `order`.`status_id` != 4)")
-    fun getByUserId(userId: Int): Flow<List<OrderWithProducts>>
+    fun getOrdersByUserId(userId: Int): PagingSource<Int, OrderWithProducts>
 
     @Query("select * from `order` where `order`.`user_id` =:userId and `order`.`status_id` = 1")
-    fun getCartByUserId(userId: Int): Flow<OrderWithProducts>
+    fun getCartByUserId(userId: Int): Flow<OrderWithProducts?>
 
     @Query("select * from `order` where `order`.`status_id` != 1 and `order`.`status_id` != 4")
-    fun getOrdersToWork(): Flow<List<OrderWithProducts>>
+    fun getOrdersToWork(): PagingSource<Int, OrderWithProducts>
 }

app/src/main/java/com/example/mobileapp/dao/OrderProductDao.kt

@@ -5,5 +5,11 @@ import com.example.mobileapp.models.OrderProduct
 @Dao
 interface OrderProductDao {
     @Insert
-    suspend fun insert(order: OrderProduct)
+    suspend fun insert(orderProduct: OrderProduct)
+    @Update
+    suspend fun update(orderProduct: OrderProduct)
+    @Delete
+    suspend fun delete(orderProduct: OrderProduct)
+    @Query("delete from order_product WHERE order_id = :orderId AND product_id = :productId")
+    suspend fun deleteByProductId(orderId: Int, productId: Int);
 }

app/src/main/java/com/example/mobileapp/dao/ProductDao.kt

@@ -1,7 +1,9 @@
 package com.example.mobileapp.dao
 import androidx.room.*
+import com.example.mobileapp.models.CategoryWithProducts
 import com.example.mobileapp.models.Product
 import kotlinx.coroutines.flow.Flow
+import androidx.paging.PagingSource
 
 @Dao
 interface ProductDao {
@@ -16,4 +18,8 @@ interface ProductDao {
     fun getAll() : Flow<List<Product>>
     @Query("select * from product where product.id = :id")
     fun getById(id: Int): Flow<Product>
+    @Query("select * from product where product.category_id = :categoryId")
+    fun getProductsByCategoryId(categoryId: Int) : PagingSource<Int, Product>
+    @Query("select * from category")
+    fun getCategoriesWithProducts() : PagingSource<Int, CategoryWithProducts>
 }

app/src/main/java/com/example/mobileapp/dao/StatusDao.kt

@@ -22,4 +22,6 @@ interface StatusDao {
     fun getAll() : Flow<List<Status>>
     @Query("select * from status where status.id = :id")
     fun getById(id: Int) : Flow<Status>
+    @Query("select * from status where status.name = :name")
+    fun getByName(name: String) : Flow<Status>
 }

app/src/main/java/com/example/mobileapp/dao/UserDao.kt

@@ -1,5 +1,7 @@
 package com.example.mobileapp.dao
+import androidx.paging.PagingSource
 import androidx.room.*
+import com.example.mobileapp.models.Product
 import com.example.mobileapp.models.User
 import kotlinx.coroutines.flow.Flow
 
@@ -14,7 +16,12 @@ interface UserDao {
 
     @Query("select * from user order by login collate nocase asc")
     fun getAll() : Flow<List<User>>
+    @Query("select * from user order by login collate nocase asc")
+    fun getAllPaged() : PagingSource<Int, User>
 
     @Query("select * from user where user.id = :id")
-    fun getById(id: Int): User
+    fun getById(id: Int): Flow<User>
+
+    @Query("select * from user where user.login = :login and user.password = :password limit 1")
+    fun getByLoginAndPassword(login: String, password: String): Flow<User?>
 }

app/src/main/java/com/example/mobileapp/db/AppDatabase.kt

@@ -19,7 +19,7 @@ import kotlinx.coroutines.launch
         Product::class,
         OrderProduct::class,
     ],
-    version = 1,
+    version = 2,
     exportSchema = false
 )
 abstract class AppDatabase : RoomDatabase() {
@@ -32,94 +32,6 @@ abstract class AppDatabase : RoomDatabase() {
     abstract fun orderProductDao() : OrderProductDao
 
     companion object {
-        private const val DB_NAME: String = "mobileapp-db"
+        const val DB_NAME: String = "mobileapp-db"
-
-        @Volatile
-        private var INSTANCE: AppDatabase? = null
-
-        private suspend fun populateDatabase() {
-            INSTANCE?.let { database ->
-
-                //Roles
-                val roleDao = database.roleDao()
-                roleDao.insert(Role(1, "admin"))
-                roleDao.insert(Role(2, "worker"))
-                roleDao.insert(Role(3, "user"))
-
-                //Statuses
-                val statusDao = database.statusDao()
-                statusDao.insert(Status(1, "Корзина"))
-                statusDao.insert(Status(2, "Принят"))
-                statusDao.insert(Status(3, "Готов"))
-                statusDao.insert(Status(4, "Выдан"))
-
-                //Categories
-                val categoryDao = database.categoryDao()
-                categoryDao.insert(Category(1, "Бургеры"))
-                categoryDao.insert(Category(2, "Картошка"))
-                categoryDao.insert(Category(3, "Напитки"))
-
-                //Users
-                val userDao = database.userDao()
-                userDao.insert(User(1, "admin", "admin", 1))
-                userDao.insert(User(2, "worker", "worker", 2))
-                userDao.insert(User(3, "user", "user", 3))
-
-                //Products
-                val productDao = database.productDao()
-                //Бургеры
-                productDao.insert(Product(1, "Бургер1", 1, 150))
-                productDao.insert(Product(2, "Бургер2", 1, 300))
-                productDao.insert(Product(3, "Бургер3", 1, 450))
-                //Картошка
-                productDao.insert(Product(4, "Картошка1", 2, 50))
-                productDao.insert(Product(5, "Картошка2", 2, 100))
-                productDao.insert(Product(6, "Картошка3", 2, 150))
-                //Напитки
-                productDao.insert(Product(7, "Напиток1", 3, 100))
-                productDao.insert(Product(8, "Напиток2", 3, 200))
-                productDao.insert(Product(9, "Напиток3", 3, 300))
-
-                //Orders
-                val orderDao = database.orderDao()
-                //Корзины
-                orderDao.insert(Order(1,1,400,1))
-                //Заказы
-                orderDao.insert(Order(2,1,250,3))
-                orderDao.insert(Order(3,1,400,2))
-
-                //region OrderProducts
-                val orderProductDao = database.orderProductDao()
-                //Корзины
-                orderProductDao.insert(OrderProduct(1,1,2))
-                orderProductDao.insert(OrderProduct(1,7,1))
-                //Заказы
-                orderProductDao.insert(OrderProduct(2,1,1))
-                orderProductDao.insert(OrderProduct(2,7,1))
-                orderProductDao.insert(OrderProduct(3,2,1))
-                orderProductDao.insert(OrderProduct(3,5,1))
-            }
-        }
-
-        fun getInstance(appContext: Context): AppDatabase {
-            return INSTANCE ?: synchronized(this) {
-                Room
-                    .databaseBuilder(
-                        appContext,
-                        AppDatabase::class.java,
-                        DB_NAME
-                    )
-                    .addCallback(object : Callback() {
-                        override fun onCreate(db: SupportSQLiteDatabase) {
-                            super.onCreate(db)
-                            CoroutineScope(Dispatchers.IO).launch {
-                                populateDatabase()
-                            }
-                        }
-                    })
-                    .build()
-                    .also { INSTANCE = it }
-            }
-        }
     }
 }

app/src/main/java/com/example/mobileapp/models/Order.kt

@@ -14,9 +14,9 @@ data class Order(
     @ColumnInfo(name = "user_id")
     val userId: Int,
     @ColumnInfo(name = "price")
-    val price: Int,
+    var price: Int,
     @ColumnInfo(name = "status_id")
-    val statusId: Int,
+    var statusId: Int,
 ) {
     override fun equals(other: Any?): Boolean {
         if (this === other) return true

app/src/main/java/com/example/mobileapp/models/OrderProduct.kt

@@ -8,5 +8,5 @@ data class OrderProduct(
     @ColumnInfo(name = "product_id", index = true)
     var productId: Int,
     @ColumnInfo(name = "amount")
-    val amount: Int
+    var amount: Int
 )

app/src/main/java/com/example/mobileapp/models/User.kt

@@ -11,7 +11,7 @@ data class User(
     @ColumnInfo(name = "password")
     val password: String,
     @ColumnInfo(name = "role_id")
-    val roleId: Int
+    var roleId: Int
 ) {
     override fun equals(other: Any?): Boolean {
         if (this === other) return true

app/src/main/java/com/example/mobileapp/navigation/AppNavigation.kt

@@ -30,6 +30,7 @@ import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.currentBackStackEntryAsState
 import androidx.navigation.compose.rememberNavController
+import com.example.mobileapp.PreferencesManager
 import com.example.mobileapp.db.AppDatabase
 import com.example.mobileapp.models.User
 import com.example.mobileapp.screens.AuthorizationScreen
@@ -74,13 +75,13 @@ fun AppNavigation(){
             composable(route = Screens.OrderScreen.name){ OrderScreen() }
 
             composable(route = Screens.AuthorizationScreen.name){ AuthorizationScreen(navController) }
-            composable(route = Screens.CreateProductScreen.name){ CreateProductScreen() }
+            composable(route = Screens.CreateProductScreen.name){ CreateProductScreen(navController) }
             composable(route = Screens.EditMenuScreen.name){ EditMenuScreen(navController) }
             composable(route = Screens.RegistrationScreen.name){ RegistrationScreen(navController) }
             composable(route = Screens.UsersScreen.name){ UsersScreen() }
             composable(route = Screens.EditProductScreen.name + "/{productId}"){ backStackEntry ->
                 val productId = backStackEntry.arguments?.getString("productId")
-                EditProductScreen(productId.toString().toInt())
+                EditProductScreen(navController, productId.toString().toInt())
             }
         }
     }
@@ -89,15 +90,10 @@ fun AppNavigation(){
 @SuppressLint("CoroutineCreationDuringComposition")
 @Composable
 fun CustomNavigationBar(navController: NavController) {
-    val user = remember { mutableStateOf(User(-1, "", "", -1)) }
+    val sharedPref = PreferencesManager(LocalContext.current)
-    val context = LocalContext.current
+    val user_role = sharedPref.getData("userRole", "user")
     val listOfNavItems = remember { mutableStateListOf<NavItem>() }
-    LaunchedEffect(Unit) {
+    when (user_role) {
-        withContext(Dispatchers.IO) {
-            user.value = (AppDatabase.getInstance(context).userDao().getById(1))
-
-            (AppDatabase.getInstance(context).roleDao().getById(user.value.roleId)).collect{data ->
-                when (data.name) {
         "admin" -> {
             listOfNavItems.clear()
             listOfNavItems.addAll(listOfAdminNavItems)
@@ -111,9 +107,7 @@ fun CustomNavigationBar(navController: NavController) {
             listOfNavItems.addAll(listOfUserNavItems)
         }
     }
-            }
+
-        }
-    }
     Row(
         modifier = Modifier
             .fillMaxWidth()

app/src/main/java/com/example/mobileapp/repositories/CategoryRepository.kt

@@ -0,0 +1,18 @@
+package com.example.mobileapp.repositories
+
+import com.example.mobileapp.dao.CategoryDao
+import com.example.mobileapp.models.Category
+import javax.inject.Inject
+import androidx.paging.*
+import kotlinx.coroutines.flow.Flow
+
+class CategoryRepository @Inject constructor(
+    private val categoryDao: CategoryDao
+){
+    suspend fun insert(category: Category) = categoryDao.insert(category)
+    suspend fun update(category: Category) = categoryDao.update(category)
+    suspend fun delete(category: Category) = categoryDao.delete(category)
+    fun getAll() = categoryDao.getAll()
+    fun getById(id: Int) = categoryDao.getById(id)
+    fun getByName(name: String) = categoryDao.getByName(name)
+}

app/src/main/java/com/example/mobileapp/repositories/OrderProductRepository.kt

@@ -0,0 +1,15 @@
+package com.example.mobileapp.repositories
+
+import com.example.mobileapp.dao.OrderProductDao
+import com.example.mobileapp.dao.ProductDao
+import com.example.mobileapp.models.OrderProduct
+import com.example.mobileapp.models.Product
+import javax.inject.Inject
+
+class OrderProductRepository @Inject constructor(
+    private val orderProductDao: OrderProductDao
+){
+    suspend fun insert(orderProduct: OrderProduct) = orderProductDao.insert(orderProduct)
+    suspend fun update(orderProduct: OrderProduct) = orderProductDao.update(orderProduct)
+    suspend fun delete(orderProduct: OrderProduct) = orderProductDao.delete(orderProduct)
+}

app/src/main/java/com/example/mobileapp/repositories/OrderRepository.kt

@@ -0,0 +1,39 @@
+package com.example.mobileapp.repositories
+
+import com.example.mobileapp.dao.OrderDao
+import androidx.paging.*
+import com.example.mobileapp.dao.OrderProductDao
+import com.example.mobileapp.models.Order
+import com.example.mobileapp.models.OrderProduct
+import com.example.mobileapp.models.OrderWithProducts
+import kotlinx.coroutines.flow.Flow
+import javax.inject.Inject
+
+class OrderRepository @Inject constructor(
+    private val orderDao: OrderDao
+){
+    suspend fun insert(order: Order):Long  {
+        return orderDao.insert(order)
+    }
+    suspend fun update(order: Order) = orderDao.update(order)
+    suspend fun delete(order: Order) = orderDao.delete(order)
+    fun getAll() = orderDao.getAll()
+    fun getById(id: Int) = orderDao.getById(id)
+    fun getOrdersByUserId(userId: Int) = Pager(
+        PagingConfig(
+            pageSize = 3,
+            enablePlaceholders = false
+        ),
+        pagingSourceFactory = { orderDao.getOrdersByUserId(userId) }
+    ).flow
+    fun getCartByUserId(userId: Int) : Flow<OrderWithProducts?> {
+        return orderDao.getCartByUserId(userId)
+    }
+    fun getOrdersToWork() = Pager(
+        PagingConfig(
+            pageSize = 3,
+            enablePlaceholders = false
+        ),
+        pagingSourceFactory = { orderDao.getOrdersToWork() }
+    ).flow
+}

app/src/main/java/com/example/mobileapp/repositories/ProductRepository.kt

@@ -0,0 +1,37 @@
+package com.example.mobileapp.repositories
+
+import androidx.paging.Pager
+import androidx.paging.PagingConfig
+import androidx.paging.PagingSource
+import com.example.mobileapp.dao.ProductDao
+import com.example.mobileapp.dao.RoleDao
+import com.example.mobileapp.models.OrderWithProducts
+import com.example.mobileapp.models.Product
+import com.example.mobileapp.models.Role
+import kotlinx.coroutines.flow.Flow
+import javax.inject.Inject
+
+class ProductRepository @Inject constructor(
+    private val productDao: ProductDao
+){
+    suspend fun insert(product: Product) = productDao.insert(product)
+    suspend fun update(product: Product) = productDao.update(product)
+    suspend fun delete(product: Product) = productDao.delete(product)
+    fun getAll() = productDao.getAll()
+    fun getById(id: Int) = productDao.getById(id)
+    fun getProductsByCategoryId(categoryId: Int) = Pager(
+        PagingConfig(
+            pageSize = 3,
+            enablePlaceholders = false
+        ),
+        pagingSourceFactory = { productDao.getProductsByCategoryId(categoryId) }
+    ).flow
+
+    fun getCategoriesWithProducts() = Pager(
+        PagingConfig(
+            pageSize = 3,
+            enablePlaceholders = false
+        ),
+        pagingSourceFactory = { productDao.getCategoriesWithProducts() }
+    ).flow
+}

app/src/main/java/com/example/mobileapp/repositories/RoleRepository.kt

@@ -0,0 +1,16 @@
+package com.example.mobileapp.repositories
+
+import com.example.mobileapp.dao.RoleDao
+import com.example.mobileapp.models.Role
+import javax.inject.Inject
+
+class RoleRepository @Inject constructor(
+    private val roleDao: RoleDao
+){
+    suspend fun insert(role: Role) = roleDao.insert(role)
+    suspend fun update(role:Role) = roleDao.update(role)
+    suspend fun delete(role:Role) = roleDao.delete(role)
+    fun getAll() = roleDao.getAll()
+    fun getById(id: Int) = roleDao.getById(id)
+    fun getByName(name: String) = roleDao.getByName(name)
+}

app/src/main/java/com/example/mobileapp/repositories/StatusRepository.kt

@@ -0,0 +1,17 @@
+package com.example.mobileapp.repositories
+
+
+import com.example.mobileapp.dao.StatusDao
+import com.example.mobileapp.models.Status
+import javax.inject.Inject
+
+class StatusRepository @Inject constructor(
+    private val statusDao: StatusDao
+){
+    suspend fun insert(status: Status) = statusDao.insert(status)
+    suspend fun update(status: Status) = statusDao.update(status)
+    suspend fun delete(status: Status) = statusDao.delete(status)
+    fun getAll() = statusDao.getAll()
+    fun getById(id: Int) = statusDao.getById(id)
+    fun getByName(name: String) = statusDao.getByName(name)
+}

app/src/main/java/com/example/mobileapp/repositories/UserRepository.kt

@@ -0,0 +1,27 @@
+package com.example.mobileapp.repositories
+
+import androidx.paging.Pager
+import androidx.paging.PagingConfig
+import com.example.mobileapp.dao.RoleDao
+import com.example.mobileapp.dao.UserDao
+import com.example.mobileapp.models.Role
+import com.example.mobileapp.models.User
+import javax.inject.Inject
+
+class UserRepository @Inject constructor(
+    private val userDao: UserDao
+){
+    suspend fun insert(user: User) = userDao.insert(user)
+    suspend fun update(user: User) = userDao.update(user)
+    suspend fun delete(user: User) = userDao.delete(user)
+    fun getAll() = userDao.getAll()
+    fun getAllPaged() = Pager(
+        PagingConfig(
+            pageSize = 6,
+            enablePlaceholders = false
+        ),
+        pagingSourceFactory = { userDao.getAllPaged() }
+    ).flow
+    fun getById(id: Int) = userDao.getById(id)
+    fun getByLoginAndPassword(login: String, password: String) = userDao.getByLoginAndPassword(login, password)
+}

app/src/main/java/com/example/mobileapp/screens/AuthorizationScreen.kt

@@ -7,29 +7,37 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Card
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.material3.TextFieldDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavController
+import com.example.mobileapp.PreferencesManager
 import com.example.mobileapp.R
 import com.example.mobileapp.navigation.Screens
+import com.example.mobileapp.viewmodels.AuthorizationViewModel
 import com.example.mobileapp.widgets.Header
 
 @Composable
@@ -46,9 +54,50 @@ fun AuthorizationScreen(navController: NavController) {
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun AuthorizationCard(navController: NavController){
+    val sharedPref = PreferencesManager(LocalContext.current)
     val login = remember { mutableStateOf(TextFieldValue("")) }
     val password = remember { mutableStateOf(TextFieldValue("")) }
 
+    val viewModel = hiltViewModel<AuthorizationViewModel>()
+
+    val success = viewModel.successState.observeAsState().value
+
+    if (success == true) {
+        navController.navigate(Screens.MenuScreen.name)
+    }
+
+    if (success == false) {
+        AlertDialog(
+            title = {
+                Text(
+                    text = "Ошибка авторизации",
+                    fontWeight = FontWeight.Bold,
+                    fontSize = 20.sp
+                )
+            },
+            text = {
+                Text(
+                    text = "Неверный логин или пароль",
+                    fontWeight = FontWeight.Normal,
+                    fontSize = 16.sp
+                )
+            },
+            onDismissRequest = {
+                viewModel.calmSuccessState()
+            },
+            confirmButton = {
+                TextButton(
+                    onClick = {
+                        viewModel.calmSuccessState()
+                    }
+                ) {
+                    Text("ОК")
+                }
+
+            }
+        )
+    }
+
     Column(
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
@@ -124,10 +173,7 @@ fun AuthorizationCard(navController: NavController){
 
                 Button(
                     onClick = {
-                        navController.navigate(Screens.MenuScreen.name) {
+                        viewModel.login(sharedPref, login.value.text, password.value.text)
-                            popUpTo(navController.graph.startDestinationId)
-                            launchSingleTop = true
-                        }
                     },
                     colors = ButtonDefaults.buttonColors(Color(255,186,83), Color.White),
                     shape = RoundedCornerShape(30.dp, 30.dp, 30.dp, 30.dp),
@@ -147,10 +193,7 @@ fun AuthorizationCard(navController: NavController){
 
                 Button(
                     onClick = {
-                        navController.navigate(Screens.RegistrationScreen.name) {
+                        navController.navigate(Screens.RegistrationScreen.name)
-                            popUpTo(navController.graph.startDestinationId)
-                            launchSingleTop = true
-                        }
                     },
                     colors = ButtonDefaults.buttonColors(Color(212,206,203)),
                     modifier = Modifier

app/src/main/java/com/example/mobileapp/screens/CartScreen.kt

@@ -13,16 +13,13 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Card
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.livedata.observeAsState
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -31,19 +28,16 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
-import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
+import com.example.mobileapp.PreferencesManager
 import com.example.mobileapp.R
-import com.example.mobileapp.db.AppDatabase
+import com.example.mobileapp.models.OrderProductWithProduct
-import com.example.mobileapp.models.CategoryWithProducts
-import com.example.mobileapp.models.Order
 import com.example.mobileapp.models.OrderWithProducts
+import com.example.mobileapp.viewmodels.CartViewModel
 import com.example.mobileapp.widgets.Header
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 @Composable
 fun CartScreen(){
@@ -59,6 +53,11 @@ fun CartScreen(){
 @SuppressLint("CoroutineCreationDuringComposition")
 @Composable
 fun CartCard(){
+    val sharedPref = PreferencesManager(LocalContext.current)
+    val cartViewModel: CartViewModel = hiltViewModel<CartViewModel>()
+    cartViewModel.retrieveUser(sharedPref)
+    val cart: OrderWithProducts? = cartViewModel.cart.observeAsState().value
+
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -84,24 +83,59 @@ fun CartCard(){
                     .padding(top = 10.dp),
                 textAlign = TextAlign.Center,
             )
-            val cartWithProducts = remember { mutableStateOf(OrderWithProducts(Order(-1, -1, -1, -1), listOf())) }
-            val context = LocalContext.current
-            val scope = rememberCoroutineScope()
-
-            LaunchedEffect(Unit) {
-                withContext(Dispatchers.IO) {
-                    AppDatabase.getInstance(context).orderDao().getCartByUserId(1).collect { data ->
-                        cartWithProducts.value = data
-                    }
-                }
-            }
 
+            if (cart != null && cart.orderWithProducts.size != 0) {
                 LazyColumn(
                     modifier = Modifier
                         .fillMaxWidth()
+                ){
+                    items(cart.orderWithProducts.size) { index ->
+                        CartProductCard(cartViewModel, cart.orderWithProducts[index])
+                    }
+                }
+
+                Card(
+                    shape = RoundedCornerShape(20.dp),
+                    border = BorderStroke(3.dp, Color(222,161,69)),
+                    modifier = Modifier
+                        .padding(top = 15.dp, start = 5.dp, end = 5.dp)
+                ){
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .background(Color.White),
+                        horizontalArrangement = Arrangement.SpaceBetween,
+                        verticalAlignment = Alignment.CenterVertically,
+                    ){
+                        Text(
+                            text = "Итого: " + cart.order.price.toString() + " р.",
+                            color = Color.Black,
+                            fontFamily = FontFamily(Font(R.font.nunito_extrabold_italic)),
+                            fontSize = 20.sp,
+                            textAlign = TextAlign.Center,
+                            modifier = Modifier.padding(start = 5.dp),
+                        )
+
+                        OutlinedButton(
+                            onClick = {
+                                cartViewModel.makeOrder()
+                            },
+                            border = BorderStroke(4.dp, Color(222,161,69)),
+                            shape = RoundedCornerShape(20.dp),
+                            colors = ButtonDefaults.outlinedButtonColors(Color(255,186,83)),
+                            modifier = Modifier.padding(5.dp)
                         ) {
-                items(cartWithProducts.value.orderWithProducts){ cartProduct ->
+                            Text(text = "Заказать", fontSize = 20.sp, color = Color.White)
-                    val amount = remember { mutableStateOf(TextFieldValue(cartProduct.orderProduct.amount.toString())) }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun CartProductCard(cartViewModel: CartViewModel, product: OrderProductWithProduct){
     Card(
         shape = RoundedCornerShape(20.dp),
         border = BorderStroke(3.dp, Color(222,161,69)),
@@ -116,59 +150,21 @@ fun CartCard(){
             verticalAlignment = Alignment.CenterVertically,
             horizontalArrangement = Arrangement.SpaceEvenly,
         ){
-                            val category = remember { mutableStateOf("")}
+            CartProductImageCard(product.product.categoryId)
-                            scope.launch {
-                                AppDatabase.getInstance(context).categoryDao().getById(cartProduct.product.categoryId).collect { data ->
-                                    category.value = data.name
-                                }
-                            }
-                            if (category.value == "Бургеры"){
-                                Image(
-                                    painterResource(
-                                        id = R.drawable.burger
-                                    ),
-                                    contentDescription = null,
-                                    modifier = Modifier
-                                        .size(100.dp, 100.dp)
-                                        .padding(5.dp),
-                                )
-                            }
-                            if (category.value == "Картошка"){
-                                Image(
-                                    painterResource(
-                                        id = R.drawable.potato
-                                    ),
-                                    contentDescription = null,
-                                    modifier = Modifier
-                                        .size(100.dp, 100.dp)
-                                        .padding(5.dp),
-                                )
-                            }
-                            if (category.value == "Напитки"){
-                                Image(
-                                    painterResource(
-                                        id = R.drawable.pepsi
-                                    ),
-                                    contentDescription = null,
-                                    modifier = Modifier
-                                        .size(100.dp, 100.dp)
-                                        .padding(5.dp),
-                                )
-                            }
 
             Column (
                 horizontalAlignment = Alignment.CenterHorizontally,
                 verticalArrangement = Arrangement.SpaceAround
             ) {
                 Text(
-                                    text = cartProduct.product.name,
+                    text = product.product.name,
                     color = Color.Black,
                     fontFamily = FontFamily(Font(R.font.nunito_extrabold_italic)),
                     fontSize = 17.sp,
                     textAlign = TextAlign.Center,
                 )
                 Text(
-                                    text = cartProduct.product.price.toString() + " р.",
+                    text = product.product.price.toString() + " р.",
                     color = Color.Black,
                     fontFamily = FontFamily(Font(R.font.nunito_extrabold_italic)),
                     fontSize = 17.sp,
@@ -184,7 +180,7 @@ fun CartCard(){
                         modifier = Modifier
                             .fillMaxHeight(),
                         onClick = {
-                                            /*TODO*/
+                            cartViewModel.removeProductFromOrder(product.product.id!!)
                         },
                         border = BorderStroke(4.dp, Color(222,161,69)),
                         shape = RoundedCornerShape(topStart = 30.dp, bottomStart = 30.dp),
@@ -203,8 +199,13 @@ fun CartCard(){
                             modifier = Modifier
                                 .background(Color.White)
                                 .fillMaxHeight()
-                                                .padding(start = 20.dp, end = 20.dp, top = 7.dp, bottom = 7.dp),
+                                .padding(
-                                            text = amount.value.text,
+                                    start = 20.dp,
+                                    end = 20.dp,
+                                    top = 7.dp,
+                                    bottom = 7.dp
+                                ),
+                            text =  product.orderProduct.amount.toString(),
                             color = Color.Black,
                             fontFamily = FontFamily(Font(R.font.nunito_bold)),
                             fontSize = 20.sp,
@@ -216,7 +217,7 @@ fun CartCard(){
                         modifier = Modifier
                             .fillMaxHeight(),
                         onClick = {
-                                            /*TODO*/
+                            cartViewModel.addProductToOrder(product.product.id!!)
                         },
                         border = BorderStroke(4.dp, Color(222,161,69)),
                         shape = RoundedCornerShape(topEnd = 30.dp, bottomEnd = 30.dp),
@@ -228,43 +229,41 @@ fun CartCard(){
             }
         }
     }
-                }
+}
-            }
-            Card(
-                shape = RoundedCornerShape(20.dp),
-                border = BorderStroke(3.dp, Color(222,161,69)),
-                modifier = Modifier
-                    .padding(top = 15.dp, start = 5.dp, end = 5.dp)
-            ){
-                Row(
-                    modifier = Modifier
-                        .fillMaxWidth()
-                        .background(Color.White),
-                    horizontalArrangement = Arrangement.SpaceBetween,
-                    verticalAlignment = Alignment.CenterVertically,
-                ){
-                    Text(
-                        text = "Итого: " + cartWithProducts.value.order.price.toString() + " р.",
-                        color = Color.Black,
-                        fontFamily = FontFamily(Font(R.font.nunito_extrabold_italic)),
-                        fontSize = 20.sp,
-                        textAlign = TextAlign.Center,
-                        modifier = Modifier.padding(start = 5.dp),
-                    )
 
-                    OutlinedButton(
+@Composable
-                        onClick = {
+fun CartProductImageCard(categoryId : Int){
-                            /*TODO*/
+    if (categoryId == 1){
-                        },
+        Image(
-                        border = BorderStroke(4.dp, Color(222,161,69)),
+            painterResource(
-                        shape = RoundedCornerShape(20.dp),
+                id = R.drawable.burger
-                        colors = ButtonDefaults.outlinedButtonColors(Color(255,186,83)),
+            ),
-                        modifier = Modifier.padding(5.dp)
+            contentDescription = null,
-                    ) {
+            modifier = Modifier
-                        Text(text = "Заказать", fontSize = 20.sp, color = Color.White)
+                .size(100.dp, 100.dp)
-                    }
+                .padding(5.dp),
-                }
+        )
     }
+    if (categoryId == 2){
+        Image(
+            painterResource(
+                id = R.drawable.potato
+            ),
+            contentDescription = null,
+            modifier = Modifier
+                .size(100.dp, 100.dp)
+                .padding(5.dp),
+        )
     }
+    if (categoryId == 3){
+        Image(
+            painterResource(
+                id = R.drawable.pepsi
+            ),
+            contentDescription = null,
+            modifier = Modifier
+                .size(100.dp, 100.dp)
+                .padding(5.dp),
+        )
     }
 }

app/src/main/java/com/example/mobileapp/screens/CreateProductScreen.kt

@@ -22,8 +22,8 @@ import androidx.compose.material3.TextField
 import androidx.compose.material3.TextFieldDefaults
 import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -31,7 +31,6 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
@@ -39,39 +38,50 @@ import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.navigation.NavController
 import com.example.mobileapp.R
-import com.example.mobileapp.db.AppDatabase
+import com.example.mobileapp.navigation.Screens
+import com.example.mobileapp.viewmodels.ProductViewModel
 import com.example.mobileapp.widgets.Header
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 
 @Composable
-fun CreateProductScreen(){
+fun CreateProductScreen(navController: NavController){
     Column (
         modifier = Modifier.fillMaxSize(),
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
         Header(Color(212, 206, 203))
-        CreateProductCard()
+        CreateProductCard(navController)
     }
 }
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun CreateProductCard(){
+fun CreateProductCard(navController: NavController){
+    val productViewModel: ProductViewModel = hiltViewModel<ProductViewModel>()
+    val title = remember { mutableStateOf(TextFieldValue("")) }
+    val price = remember { mutableStateOf(TextFieldValue("")) }
+    val categoryList = remember { mutableStateListOf(productViewModel.categories) }
+    var selectedCategory by remember { mutableStateOf("") }
+    var expanded by remember { mutableStateOf(false) }
+    val success = productViewModel.successState.observeAsState().value
+
+    if (success == true) {
+        navController.navigate(Screens.ManagmentScreen.name)
+    }
+
     Column(
         modifier = Modifier
             .fillMaxSize()
             .background(Color(212, 206, 203)),
         horizontalAlignment = Alignment.CenterHorizontally,
-
         ) {
         Column(
             modifier = Modifier
                 .fillMaxHeight()
                 .fillMaxWidth(0.9f)
                 .background(Color.White),
-
             horizontalAlignment = Alignment.CenterHorizontally,
         ) {
             Text(
@@ -84,9 +94,6 @@ fun CreateProductCard(){
                     .padding(top = 10.dp),
                 textAlign = TextAlign.Center,
             )
-            val title = remember { mutableStateOf(TextFieldValue("")) }
-            val price = remember { mutableStateOf(TextFieldValue("")) }
-
             Card(
                 shape = RoundedCornerShape(20.dp),
                 border = BorderStroke(3.dp, Color(222,161,69)),
@@ -127,19 +134,6 @@ fun CreateProductCard(){
                                 onSurface = Color.Gray
                             )
                         ){
-                            val categoryList = remember { mutableStateListOf<String>() }
-                            var selectedCategory by remember { mutableStateOf("") }
-                            var expanded by remember { mutableStateOf(false) }
-                            val context = LocalContext.current
-                            LaunchedEffect(Unit) {
-                                withContext(Dispatchers.IO) {
-                                    AppDatabase.getInstance(context).categoryDao().getAll().collect { data ->
-                                        categoryList.clear()
-                                        categoryList.addAll(data.map { category ->  category.name })
-                                        selectedCategory = data.first().name
-                                    }
-                                }
-                            }
                             ExposedDropdownMenuBox(
                                 expanded = expanded,
                                 onExpandedChange = {
@@ -162,7 +156,7 @@ fun CreateProductCard(){
                                         expanded = false
                                     },
                                 ) {
-                                    categoryList.forEach { selectionOption ->
+                                    categoryList.first().forEach { selectionOption ->
                                         DropdownMenuItem(
                                             text = { Text(selectionOption) },
                                             onClick = {
@@ -195,10 +189,9 @@ fun CreateProductCard(){
                             .fillMaxWidth()
                             .padding(top = 20.dp, start = 20.dp, end = 20.dp),
                     )
-
                     OutlinedButton(
                         onClick = {
-                            /*TODO*/
+                            productViewModel.addProduct(title.value.text, selectedCategory, price.value.text)
                         },
                         border = BorderStroke(4.dp, Color(222,161,69)),
                         shape = RoundedCornerShape(20.dp),

app/src/main/java/com/example/mobileapp/screens/EditMenuScreen.kt

@@ -12,7 +12,6 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Card
@@ -20,10 +19,6 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.mutableStateListOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
@@ -34,14 +29,18 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavController
+import androidx.paging.compose.collectAsLazyPagingItems
+import androidx.paging.compose.itemKey
+import com.example.mobileapp.PreferencesManager
 import com.example.mobileapp.R
-import com.example.mobileapp.db.AppDatabase
+import com.example.mobileapp.models.Category
 import com.example.mobileapp.models.CategoryWithProducts
+import com.example.mobileapp.models.Product
 import com.example.mobileapp.navigation.Screens
+import com.example.mobileapp.viewmodels.MenuViewModel
 import com.example.mobileapp.widgets.Header
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 
 @Composable
 fun EditMenuScreen(navController: NavController){
@@ -56,6 +55,11 @@ fun EditMenuScreen(navController: NavController){
 
 @Composable
 fun EditMenuCard(navController: NavController){
+    val sharedPref = PreferencesManager(LocalContext.current)
+    val menuViewModel: MenuViewModel = hiltViewModel<MenuViewModel>()
+    menuViewModel.retrieveUser(sharedPref)
+    val categoriesWithProducts = menuViewModel.categoiesWithProductsListUiState.collectAsLazyPagingItems()
+
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -71,25 +75,30 @@ fun EditMenuCard(navController: NavController){
 
             horizontalAlignment = Alignment.CenterHorizontally,
         ) {
-            val categoryWithProducts = remember { mutableStateListOf<CategoryWithProducts>() }
-            val context = LocalContext.current
-            val scope = rememberCoroutineScope()
-
-            LaunchedEffect(Unit) {
-                withContext(Dispatchers.IO) {
-                    AppDatabase.getInstance(context).categoryDao().getCategoryWithProducts().collect { data ->
-                        categoryWithProducts.addAll(data)
-                    }
-                }
-            }
 
             LazyColumn(
                 modifier = Modifier
                     .fillMaxSize()
             ) {
-                items(categoryWithProducts){ item ->
+                items(
+                    count = categoriesWithProducts.itemCount,
+                    key = categoriesWithProducts.itemKey()
+                ){ index ->
+                    EditMenuCategoryProductsCard(navController, menuViewModel, categoriesWithProducts[index]!!)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun EditMenuCategoryProductsCard(navController: NavController, menuViewModel : MenuViewModel, categoryWithProducts: CategoryWithProducts){
+    if (categoryWithProducts.products.size == 0){
+        return
+    }
+
     Text(
-                        text = item.category.name,
+        text = categoryWithProducts.category.name,
         color = Color.Black,
         fontFamily = FontFamily(Font(R.font.nunito_extrabold_italic)),
         fontSize = 34.sp,
@@ -99,7 +108,13 @@ fun EditMenuCard(navController: NavController){
         textAlign = TextAlign.Center,
     )
 
-                    item.products.forEach{ product ->
+    categoryWithProducts.products.forEach{ product ->
+        EditMenuProductsCard(navController, menuViewModel, product, categoryWithProducts.category)
+    }
+}
+
+@Composable
+fun EditMenuProductsCard(navController: NavController, menuViewModel : MenuViewModel, product : Product, category: Category){
     Card(
         shape = RoundedCornerShape(20.dp),
         border = BorderStroke(3.dp, Color(222,161,69)),
@@ -114,39 +129,7 @@ fun EditMenuCard(navController: NavController){
             verticalAlignment = Alignment.CenterVertically,
             horizontalArrangement = Arrangement.SpaceEvenly,
         ){
-                                if (item.category.name == "Бургеры"){
+            EditMenuProductImageCard(category.name)
-                                    Image(
-                                        painterResource(
-                                            id = R.drawable.burger
-                                        ),
-                                        contentDescription = null,
-                                        modifier = Modifier
-                                            .size(100.dp, 100.dp)
-                                            .padding(5.dp),
-                                    )
-                                }
-                                if (item.category.name == "Картошка"){
-                                    Image(
-                                        painterResource(
-                                            id = R.drawable.potato
-                                        ),
-                                        contentDescription = null,
-                                        modifier = Modifier
-                                            .size(100.dp, 100.dp)
-                                            .padding(5.dp),
-                                    )
-                                }
-                                if (item.category.name == "Напитки"){
-                                    Image(
-                                        painterResource(
-                                            id = R.drawable.pepsi
-                                        ),
-                                        contentDescription = null,
-                                        modifier = Modifier
-                                            .size(100.dp, 100.dp)
-                                            .padding(5.dp),
-                                    )
-                                }
 
             Column (
                 horizontalAlignment = Alignment.CenterHorizontally,
@@ -172,10 +155,7 @@ fun EditMenuCard(navController: NavController){
                     )
                     OutlinedButton(
                         onClick = {
-                                                navController.navigate(Screens.EditProductScreen.name + "/${product.id}") {
+                            navController.navigate(Screens.EditProductScreen.name + "/${product.id}")
-                                                    popUpTo(navController.graph.startDestinationId)
-                                                    launchSingleTop = true
-                                                }
                         },
                         border = BorderStroke(4.dp, Color(222,161,69)),
                         shape = RoundedCornerShape(10.dp),
@@ -191,7 +171,9 @@ fun EditMenuCard(navController: NavController){
                     }
 
                     OutlinedButton(
-                                            onClick = { /*TODO*/},
+                        onClick = {
+                            menuViewModel.deleteProduct(product)
+                        },
                         border = BorderStroke(4.dp, Color(222,161,69)),
                         shape = RoundedCornerShape(10.dp),
                         colors = ButtonDefaults.outlinedButtonColors(Color(255,186,83)),
@@ -208,9 +190,41 @@ fun EditMenuCard(navController: NavController){
             }
         }
     }
+}
+
+@Composable
+fun EditMenuProductImageCard(categoryName : String){
+    if (categoryName == "Бургеры"){
+        Image(
+            painterResource(
+                id = R.drawable.burger
+            ),
+            contentDescription = null,
+            modifier = Modifier
+                .size(100.dp, 100.dp)
+                .padding(5.dp),
+        )
     }
+    if (categoryName == "Картошка"){
+        Image(
+            painterResource(
+                id = R.drawable.potato
+            ),
+            contentDescription = null,
+            modifier = Modifier
+                .size(100.dp, 100.dp)
+                .padding(5.dp),
+        )
     }
-            }
+    if (categoryName == "Напитки"){
-        }
+        Image(
+            painterResource(
+                id = R.drawable.pepsi
+            ),
+            contentDescription = null,
+            modifier = Modifier
+                .size(100.dp, 100.dp)
+                .padding(5.dp),
+        )
     }
 }

app/src/main/java/com/example/mobileapp/screens/EditProductScreen.kt

@@ -23,8 +23,8 @@ import androidx.compose.material3.TextField
 import androidx.compose.material3.TextFieldDefaults
 import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -33,7 +33,6 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
@@ -41,28 +40,55 @@ import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.navigation.NavController
 import com.example.mobileapp.R
-import com.example.mobileapp.db.AppDatabase
+import com.example.mobileapp.models.Product
+import com.example.mobileapp.navigation.Screens
+import com.example.mobileapp.viewmodels.ProductViewModel
 import com.example.mobileapp.widgets.Header
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 @Composable
-fun EditProductScreen(id: Int){
+fun EditProductScreen(navController: NavController, id: Int){
     Column (
         modifier = Modifier.fillMaxSize(),
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
         Header(Color(212, 206, 203))
-        EditProductCard(id)
+        EditProductCard(navController, id)
     }
 }
 
 @SuppressLint("CoroutineCreationDuringComposition")
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun EditProductCard(id: Int){
+fun EditProductCard(navController: NavController, productId : Int){
+    val scope = rememberCoroutineScope()
+    val productViewModel: ProductViewModel = hiltViewModel<ProductViewModel>()
+    productViewModel.getProduct(productId)
+
+    val currentProduct = remember { mutableStateOf<Product?>(null) }
+    val title = remember { mutableStateOf(TextFieldValue("")) }
+    val price = remember { mutableStateOf(TextFieldValue("")) }
+    val categoryList = remember { mutableStateListOf(productViewModel.categories) }
+    var selectedCategory by remember { mutableStateOf("") }
+    var expanded by remember { mutableStateOf(false) }
+    val success = productViewModel.successState.observeAsState().value
+
+    if (productViewModel.product.value != null){
+        currentProduct.value = productViewModel.product.value!!
+        title.value = TextFieldValue(productViewModel.product.value!!.name)
+        price.value = TextFieldValue(productViewModel.product.value!!.price.toString())
+        scope.launch {
+            selectedCategory = productViewModel.getCategory(productViewModel.product.value!!.categoryId)
+        }
+    }
+
+    if (success == true) {
+        navController.navigate(Screens.EditMenuScreen.name)
+    }
+
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -88,25 +114,6 @@ fun EditProductCard(id: Int){
                     .padding(top = 10.dp),
                 textAlign = TextAlign.Center,
             )
-            val context = LocalContext.current
-
-            var selectedCategory by remember { mutableStateOf("") }
-            var expanded by remember { mutableStateOf(false) }
-            val title = remember { mutableStateOf(TextFieldValue("")) }
-            val price = remember { mutableStateOf(TextFieldValue("")) }
-            val scope = rememberCoroutineScope()
-            LaunchedEffect(Unit) {
-                withContext(Dispatchers.IO) {
-                    AppDatabase.getInstance(context).productDao().getById(id).collect {data ->
-                        title.value = TextFieldValue(data.name)
-                        price.value = TextFieldValue(data.price.toString())
-
-                        AppDatabase.getInstance(context).categoryDao().getById(data.categoryId).collect {
-                            selectedCategory = it.name
-                        }
-                    }
-                }
-            }
             Card(
                 shape = RoundedCornerShape(20.dp),
                 border = BorderStroke(3.dp, Color(222,161,69)),
@@ -138,7 +145,9 @@ fun EditProductCard(id: Int){
                     Card(
                         shape = RoundedCornerShape(20.dp),
                         border = BorderStroke(1.dp, Color(222,161,69)),
-                        modifier = Modifier.fillMaxWidth().padding(top = 20.dp, start = 20.dp, end = 20.dp),
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(top = 20.dp, start = 20.dp, end = 20.dp),
                     ){
 
                         MaterialTheme(
@@ -148,13 +157,6 @@ fun EditProductCard(id: Int){
                                 onSurface = Color.Gray
                             )
                         ){
-                            val categoryList = remember { mutableStateListOf<String>() }
-                            scope.launch {
-                                AppDatabase.getInstance(context).categoryDao().getAll().collect { data ->
-                                    categoryList.clear()
-                                    categoryList.addAll(data.map { category ->  category.name })
-                                }
-                            }
                             ExposedDropdownMenuBox(
                                 expanded = expanded,
                                 onExpandedChange = {
@@ -163,7 +165,8 @@ fun EditProductCard(id: Int){
                             ) {
                                 TextField(
                                     modifier = Modifier
-                                        .menuAnchor().fillMaxWidth(),
+                                        .menuAnchor()
+                                        .fillMaxWidth(),
                                     readOnly = true,
                                     value = selectedCategory,
                                     onValueChange = {},
@@ -177,7 +180,7 @@ fun EditProductCard(id: Int){
                                         expanded = false
                                     },
                                 ) {
-                                    categoryList.forEach { selectionOption ->
+                                    categoryList.first().forEach { selectionOption ->
                                         DropdownMenuItem(
                                             text = { Text(selectionOption) },
                                             onClick = {
@@ -213,7 +216,7 @@ fun EditProductCard(id: Int){
 
                     OutlinedButton(
                         onClick = {
-                            /*TODO*/
+                            productViewModel.updateProduct(currentProduct.value?.id!!, title.value.text, selectedCategory, price.value.text)
                         },
                         border = BorderStroke(4.dp, Color(222,161,69)),
                         shape = RoundedCornerShape(20.dp),

app/src/main/java/com/example/mobileapp/screens/ManagmentScreen.kt

@@ -74,10 +74,7 @@ fun ManagmentCard(navController: NavController){
             ){
                 OutlinedButton(
                     onClick = {
-                        navController.navigate(Screens.CreateProductScreen.name) {
+                        navController.navigate(Screens.CreateProductScreen.name)
-                            popUpTo(navController.graph.startDestinationId)
-                            launchSingleTop = true
-                        }
                     },
                     border = BorderStroke(4.dp, Color(222,161,69)),
                     shape = RoundedCornerShape(20.dp),
@@ -94,10 +91,7 @@ fun ManagmentCard(navController: NavController){
 
                 OutlinedButton(
                     onClick = {
-                        navController.navigate(Screens.EditMenuScreen.name) {
+                        navController.navigate(Screens.EditMenuScreen.name)
-                            popUpTo(navController.graph.startDestinationId)
-                            launchSingleTop = true
-                        }
                     },
                     border = BorderStroke(4.dp, Color(222,161,69)),
                     shape = RoundedCornerShape(20.dp),
@@ -124,10 +118,7 @@ fun ManagmentCard(navController: NavController){
             )
             OutlinedButton(
                 onClick = {
-                    navController.navigate(Screens.UsersScreen.name) {
+                    navController.navigate(Screens.UsersScreen.name)
-                        popUpTo(navController.graph.startDestinationId)
-                        launchSingleTop = true
-                    }
                 },
                 border = BorderStroke(4.dp, Color(222,161,69)),
                 shape = RoundedCornerShape(20.dp),

app/src/main/java/com/example/mobileapp/screens/MenuScreen.kt

@@ -12,18 +12,12 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Card
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.mutableStateListOf
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
@@ -34,13 +28,16 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.paging.compose.collectAsLazyPagingItems
+import androidx.paging.compose.itemKey
+import com.example.mobileapp.PreferencesManager
 import com.example.mobileapp.R
-import com.example.mobileapp.db.AppDatabase
 import com.example.mobileapp.models.Category
 import com.example.mobileapp.models.CategoryWithProducts
+import com.example.mobileapp.models.Product
+import com.example.mobileapp.viewmodels.MenuViewModel
 import com.example.mobileapp.widgets.Header
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 
 @Composable
 fun MenuScreen(){
@@ -55,6 +52,11 @@ fun MenuScreen(){
 
 @Composable
 fun MenuCard(){
+    val sharedPref = PreferencesManager(LocalContext.current)
+    val menuViewModel: MenuViewModel = hiltViewModel<MenuViewModel>()
+    menuViewModel.retrieveUser(sharedPref)
+    val categoriesWithProducts = menuViewModel.categoiesWithProductsListUiState.collectAsLazyPagingItems()
+
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -70,24 +72,29 @@ fun MenuCard(){
 
             horizontalAlignment = Alignment.CenterHorizontally,
         ) {
-            val categoryWithProducts = remember { mutableStateListOf<CategoryWithProducts>()}
-            val context = LocalContext.current
-
-            LaunchedEffect(Unit) {
-                withContext(Dispatchers.IO) {
-                    (AppDatabase.getInstance(context).categoryDao().getCategoryWithProducts()).collect { data ->
-                        categoryWithProducts.addAll(data)
-                    }
-                }
-            }
-
             LazyColumn(
                 modifier = Modifier
                     .fillMaxSize()
             ) {
-                items(categoryWithProducts){ item ->
+                items(
+                    count = categoriesWithProducts.itemCount,
+                    key = categoriesWithProducts.itemKey()
+                ){ index ->
+                    MenuCategoryProductsCard(menuViewModel, categoriesWithProducts[index]!!)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun MenuCategoryProductsCard(menuViewModel : MenuViewModel, categoryWithProducts: CategoryWithProducts){
+    if (categoryWithProducts.products.size == 0){
+        return
+    }
+
     Text(
-                        text = item.category.name,
+        text = categoryWithProducts.category.name,
         color = Color.Black,
         fontFamily = FontFamily(Font(R.font.nunito_extrabold_italic)),
         fontSize = 34.sp,
@@ -97,7 +104,13 @@ fun MenuCard(){
         textAlign = TextAlign.Center,
     )
 
-                    item.products.forEach{ product ->
+    categoryWithProducts.products.forEach{ product ->
+        MenuProductsCard(menuViewModel, product, categoryWithProducts.category)
+    }
+}
+
+@Composable
+fun MenuProductsCard(menuViewModel : MenuViewModel, product : Product, category: Category){
     Card(
         shape = RoundedCornerShape(20.dp),
         border = BorderStroke(3.dp, Color(222,161,69)),
@@ -112,39 +125,7 @@ fun MenuCard(){
             verticalAlignment = Alignment.CenterVertically,
             horizontalArrangement = Arrangement.SpaceEvenly,
         ){
-                                if (item.category.name == "Бургеры"){
+            MenuProductImageCard(category.name)
-                                    Image(
-                                        painterResource(
-                                            id = R.drawable.burger
-                                        ),
-                                        contentDescription = null,
-                                        modifier = Modifier
-                                            .size(100.dp, 100.dp)
-                                            .padding(5.dp),
-                                    )
-                                }
-                                if (item.category.name == "Картошка"){
-                                    Image(
-                                        painterResource(
-                                            id = R.drawable.potato
-                                        ),
-                                        contentDescription = null,
-                                        modifier = Modifier
-                                            .size(100.dp, 100.dp)
-                                            .padding(5.dp),
-                                    )
-                                }
-                                if (item.category.name == "Напитки"){
-                                    Image(
-                                        painterResource(
-                                            id = R.drawable.pepsi
-                                        ),
-                                        contentDescription = null,
-                                        modifier = Modifier
-                                            .size(100.dp, 100.dp)
-                                            .padding(5.dp),
-                                    )
-                                }
 
             Column (
                 horizontalAlignment = Alignment.CenterHorizontally,
@@ -169,7 +150,9 @@ fun MenuCard(){
                         textAlign = TextAlign.Center,
                     )
                     OutlinedButton(
-                                            onClick = {/*TODO*/},
+                        onClick = {
+                            menuViewModel.addProductToCart(product.id!!)
+                        },
                         border = BorderStroke(4.dp, Color(222,161,69)),
                         shape = RoundedCornerShape(30.dp),
                         colors = ButtonDefaults.outlinedButtonColors(Color(255,186,83)),
@@ -180,9 +163,41 @@ fun MenuCard(){
             }
         }
     }
+}
+
+@Composable
+fun MenuProductImageCard(categoryName : String){
+    if (categoryName == "Бургеры"){
+        Image(
+            painterResource(
+                id = R.drawable.burger
+            ),
+            contentDescription = null,
+            modifier = Modifier
+                .size(100.dp, 100.dp)
+                .padding(5.dp),
+        )
     }
+    if (categoryName == "Картошка"){
+        Image(
+            painterResource(
+                id = R.drawable.potato
+            ),
+            contentDescription = null,
+            modifier = Modifier
+                .size(100.dp, 100.dp)
+                .padding(5.dp),
+        )
     }
-            }
+    if (categoryName == "Напитки"){
-        }
+        Image(
+            painterResource(
+                id = R.drawable.pepsi
+            ),
+            contentDescription = null,
+            modifier = Modifier
+                .size(100.dp, 100.dp)
+                .padding(5.dp),
+        )
     }
 }

app/src/main/java/com/example/mobileapp/screens/OrderScreen.kt

@@ -11,35 +11,34 @@ 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.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Card
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.livedata.observeAsState
 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.platform.LocalContext
 import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.paging.compose.collectAsLazyPagingItems
+import androidx.paging.compose.itemKey
 import com.example.mobileapp.R
-import com.example.mobileapp.db.AppDatabase
-import com.example.mobileapp.models.Order
 import com.example.mobileapp.models.OrderWithProducts
+import com.example.mobileapp.viewmodels.OrderViewModel
 import com.example.mobileapp.widgets.Header
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 @Composable
 fun OrderScreen(){
@@ -48,13 +47,16 @@ fun OrderScreen(){
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
         Header(Color(212, 206, 203))
-        OrderCard()
+        OrdersCard()
     }
 }
 
 @SuppressLint("CoroutineCreationDuringComposition")
 @Composable
-fun OrderCard(){
+fun OrdersCard(){
+    val orderViewModel: OrderViewModel = hiltViewModel<OrderViewModel>()
+    val orderListUiState = orderViewModel.orderList.observeAsState().value?.collectAsLazyPagingItems()
+
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -80,30 +82,33 @@ fun OrderCard(){
                     .padding(top = 10.dp),
                 textAlign = TextAlign.Center,
             )
-
+            if (orderListUiState != null){
-            val ordersWithProducts = remember { mutableStateListOf<OrderWithProducts> () }
-            val context = LocalContext.current
-            val scope = rememberCoroutineScope()
-
-            LaunchedEffect(Unit) {
-                withContext(Dispatchers.IO) {
-                    AppDatabase.getInstance(context).orderDao().getOrdersToWork().collect { data ->
-                        ordersWithProducts.addAll(data)
-                    }
-                }
-            }
-
                 LazyColumn(
                     modifier = Modifier
                         .fillMaxWidth()
                 ) {
-                items(ordersWithProducts){ order ->
+                    items(
-                    val status = remember { mutableStateOf("")}
+                        count = orderListUiState.itemCount,
-                    scope.launch {
+                        key = orderListUiState.itemKey()
-                        AppDatabase.getInstance(context).statusDao().getById(order.order.statusId).collect { data ->
+                    ){ index ->
-                            status.value = data.name
+                        if (orderListUiState[index] != null){
+                            OrderCard(orderListUiState[index]!!, orderViewModel)
                         }
                     }
+                }
+            }
+        }
+    }
+}
+
+@SuppressLint("CoroutineCreationDuringComposition")
+@Composable
+fun OrderCard(order: OrderWithProducts, orderViewModel: OrderViewModel){
+    val scope = rememberCoroutineScope()
+    var status by remember { mutableStateOf("")}
+    scope.launch {
+        status = orderViewModel.getOrderStatus(order.order.statusId)
+    }
     Card(
         shape = RoundedCornerShape(20.dp),
         border = BorderStroke(3.dp, Color(222,161,69)),
@@ -124,9 +129,8 @@ fun OrderCard(){
                 fontSize = 34.sp,
                 textAlign = TextAlign.Center,
             )
-
             Text(
-                                text = "Статус: " + status.value,
+                text = "Статус: " + status,
                 color = Color.Black,
                 fontFamily = FontFamily(Font(R.font.nunito_extrabold_italic)),
                 fontSize = 20.sp,
@@ -142,6 +146,7 @@ fun OrderCard(){
             horizontalArrangement = Arrangement.SpaceAround,
         ){
             Column {
+                if (order.orderWithProducts.size != 0){
                     order.orderWithProducts.forEach{ orderProduct ->
                         Row(
                             modifier = Modifier
@@ -159,16 +164,17 @@ fun OrderCard(){
                         }
                     }
                 }
-                            if (order.order.statusId == 2){
+            }
             OutlinedButton(
                 onClick = {
-                                        /*TODO*/
+                    orderViewModel.changeOrderStatus(order.order.id!!)
                 },
                 border = BorderStroke(4.dp, Color(222,161,69)),
                 shape = RoundedCornerShape(20.dp),
                 colors = ButtonDefaults.outlinedButtonColors(Color(255,186,83)),
                 modifier = Modifier.padding(bottom = 10.dp)
             ) {
+                if (order.order.statusId == 2){
                     Text(
                         text = "Готов",
                         fontFamily = FontFamily(Font(R.font.nunito_extrabold_italic)),
@@ -176,17 +182,7 @@ fun OrderCard(){
                         color = Color.White
                     )
                 }
-                            }
                 if (order.order.statusId == 3){
-                                OutlinedButton(
-                                    onClick = {
-                                        /*TODO*/
-                                    },
-                                    border = BorderStroke(4.dp, Color(222,161,69)),
-                                    shape = RoundedCornerShape(20.dp),
-                                    colors = ButtonDefaults.outlinedButtonColors(Color(255,186,83)),
-                                    modifier = Modifier.padding(bottom = 10.dp)
-                                ) {
                     Text(
                         text = "Выдать",
                         fontFamily = FontFamily(Font(R.font.nunito_extrabold_italic)),
@@ -197,8 +193,4 @@ fun OrderCard(){
             }
         }
     }
-                }
-            }
-        }
-    }
 }

app/src/main/java/com/example/mobileapp/screens/ProfileScreen.kt

@@ -11,15 +11,12 @@ 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.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Card
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
@@ -32,15 +29,17 @@ import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavController
+import androidx.paging.compose.collectAsLazyPagingItems
+import androidx.paging.compose.itemKey
+import com.example.mobileapp.PreferencesManager
 import com.example.mobileapp.R
-import com.example.mobileapp.db.AppDatabase
 import com.example.mobileapp.models.OrderWithProducts
 import com.example.mobileapp.navigation.Screens
+import com.example.mobileapp.viewmodels.ProfileViewModel
 import com.example.mobileapp.widgets.Header
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 @Composable
 fun ProfileScreen(navController: NavController){
@@ -56,12 +55,15 @@ fun ProfileScreen(navController: NavController){
 @SuppressLint("CoroutineCreationDuringComposition")
 @Composable
 fun ProfileCard(navController: NavController){
+    val sharedPref = PreferencesManager(LocalContext.current)
+    val profileViewModel: ProfileViewModel = hiltViewModel<ProfileViewModel>()
+    val activeOrdersListUiState = profileViewModel.getActiveOrders(sharedPref.getData("userId", "-1").toInt())?.collectAsLazyPagingItems()
+
     Column(
         modifier = Modifier
             .fillMaxSize()
             .background(Color(212, 206, 203)),
         horizontalAlignment = Alignment.CenterHorizontally,
-
         ) {
         Column(
             modifier = Modifier
@@ -76,10 +78,8 @@ fun ProfileCard(navController: NavController){
                     .fillMaxWidth()
                     .padding(top = 15.dp, start = 5.dp, end = 5.dp),
                 onClick = {
-                    navController.navigate(Screens.AuthorizationScreen.name) {
+                    profileViewModel.logout(sharedPref)
-                        popUpTo(navController.graph.startDestinationId)
+                    navController.navigate(Screens.AuthorizationScreen.name)
-                        launchSingleTop = true
-                    }
                 },
                 border = BorderStroke(4.dp, Color(255,86,86)),
                 shape = RoundedCornerShape(20.dp),
@@ -104,37 +104,45 @@ fun ProfileCard(navController: NavController){
                 textAlign = TextAlign.Center,
             )
 
-            val ordersWithProducts = remember { mutableStateListOf<OrderWithProducts> () }
-            val context = LocalContext.current
-            val scope = rememberCoroutineScope()
-
-            LaunchedEffect(Unit) {
-                withContext(Dispatchers.IO) {
-                    AppDatabase.getInstance(context).orderDao().getByUserId(1).collect { data ->
-                        ordersWithProducts.clear()
-                        ordersWithProducts.addAll(data)
-                    }
-                }
-            }
 
+            if (activeOrdersListUiState != null){
                 LazyColumn(
                     modifier = Modifier
                         .fillMaxWidth()
                 ) {
-                items(ordersWithProducts){ order ->
+                    items(
+                        count = activeOrdersListUiState.itemCount,
+                        key = activeOrdersListUiState.itemKey()
+                    ){ index ->
+                        ActiveOrderCard(activeOrdersListUiState[index]!!, profileViewModel)
+                    }
+                }
+            }
+        }
+    }
+}
+
+@SuppressLint("CoroutineCreationDuringComposition")
+@Composable
+fun ActiveOrderCard(order: OrderWithProducts, profileViewModel: ProfileViewModel) {
+    val scope = rememberCoroutineScope()
+    val status = remember { mutableStateOf("")}
+    scope.launch {
+        status.value = profileViewModel.getOrderStatus(order.order.statusId)
+    }
     Card(
         shape = RoundedCornerShape(20.dp),
         border = BorderStroke(3.dp, Color(222,161,69)),
         modifier = Modifier
             .padding(top = 15.dp, start = 5.dp, end = 5.dp)
-                    ){
+    ) {
         Row(
             modifier = Modifier
                 .fillMaxWidth()
                 .background(Color.White),
             verticalAlignment = Alignment.CenterVertically,
             horizontalArrangement = Arrangement.SpaceEvenly,
-                        ){
+        ) {
             Text(
                 text = "№" + order.order.id.toString(),
                 color = Color.Black,
@@ -142,12 +150,6 @@ fun ProfileCard(navController: NavController){
                 fontSize = 34.sp,
                 textAlign = TextAlign.Center,
             )
-                            val status = remember { mutableStateOf("")}
-                            scope.launch {
-                                AppDatabase.getInstance(context).statusDao().getById(order.order.statusId).collect { data ->
-                                    status.value = data.name
-                                }
-                            }
             Text(
                 text = "Статус: " + status.value,
                 color = Color.Black,
@@ -156,14 +158,14 @@ fun ProfileCard(navController: NavController){
                 textAlign = TextAlign.Center,
             )
         }
-                        order.orderWithProducts.forEach{ orderProduct ->
+        order.orderWithProducts.forEach { orderProduct ->
             Row(
                 modifier = Modifier
                     .fillMaxWidth()
                     .background(Color.White),
                 verticalAlignment = Alignment.CenterVertically,
                 horizontalArrangement = Arrangement.Center,
-                            ){
+            ) {
                 Text(
                     text = orderProduct.product.name + " " + orderProduct.product.price.toString() + "р. x" + orderProduct.orderProduct.amount.toString(),
                     color = Color.Gray,
@@ -179,7 +181,7 @@ fun ProfileCard(navController: NavController){
                 .background(Color.White),
             verticalAlignment = Alignment.CenterVertically,
             horizontalArrangement = Arrangement.Start,
-                        ){
+        ) {
             Text(
                 text = "К оплате: " + order.order.price.toString() + " р.",
                 modifier = Modifier.padding(start = 20.dp),
@@ -190,8 +192,4 @@ fun ProfileCard(navController: NavController){
             )
         }
     }
-                }
-            }
-        }
-    }
 }

app/src/main/java/com/example/mobileapp/screens/RegistrationScreen.kt

@@ -7,14 +7,17 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Card
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.material3.TextFieldDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
@@ -23,13 +26,16 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.Font
 import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavController
 import com.example.mobileapp.R
 import com.example.mobileapp.navigation.Screens
+import com.example.mobileapp.viewmodels.RegistrationViewModel
 import com.example.mobileapp.widgets.Header
 
 @Composable
@@ -50,6 +56,44 @@ fun RegistrationCard(navController: NavController){
     val password = remember { mutableStateOf(TextFieldValue("")) }
     val passwordRepeat = remember { mutableStateOf(TextFieldValue("")) }
 
+    val viewModel = hiltViewModel<RegistrationViewModel>()
+    val success = viewModel.successState.observeAsState().value
+
+    if (success == true) {
+        navController.navigate(Screens.AuthorizationScreen.name)
+    }
+
+    if (success == false) {
+        AlertDialog(
+            title = {
+                Text(
+                    text = "Ошибка регистрации",
+                    fontWeight = FontWeight.Bold,
+                    fontSize = 20.sp
+                )
+            },
+            text = {
+                Text(
+                    text = "Проверьте корректность введенных данных",
+                    fontWeight = FontWeight.Normal,
+                    fontSize = 16.sp
+                )
+            },
+            onDismissRequest = {
+                viewModel.calmSuccessState()
+            },
+            confirmButton = {
+                TextButton(
+                    onClick = {
+                        viewModel.calmSuccessState()
+                    }
+                ) {
+                    Text("ОК")
+                }
+            }
+        )
+    }
+
     Column(
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
@@ -146,10 +190,7 @@ fun RegistrationCard(navController: NavController){
 
                 Button(
                     onClick = {
-                        navController.navigate(Screens.MenuScreen.name) {
+                        viewModel.registration(login.value.text, password.value.text, passwordRepeat.value.text)
-                            popUpTo(navController.graph.startDestinationId)
-                            launchSingleTop = true
-                        }
                     },
                     colors = ButtonDefaults.buttonColors(Color(255,186,83), Color.White),
                     shape = RoundedCornerShape(30.dp, 30.dp, 30.dp, 30.dp),
@@ -169,10 +210,7 @@ fun RegistrationCard(navController: NavController){
 
                 Button(
                     onClick = {
-                        navController.navigate(Screens.AuthorizationScreen.name) {
+                        navController.navigate(Screens.AuthorizationScreen.name)
-                            popUpTo(navController.graph.startDestinationId)
-                            launchSingleTop = true
-                        }
                     },
                     colors = ButtonDefaults.buttonColors(Color(212,206,203)),
                     modifier = Modifier

app/src/main/java/com/example/mobileapp/screens/UsersScreen.kt

@@ -30,6 +30,7 @@ import androidx.compose.material3.TextFieldDefaults
 import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.runtime.mutableStateOf
@@ -49,11 +50,21 @@ 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.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.map
+import androidx.paging.compose.collectAsLazyPagingItems
+import androidx.paging.compose.itemKey
+import com.example.mobileapp.PreferencesManager
 import com.example.mobileapp.R
 import com.example.mobileapp.db.AppDatabase
+import com.example.mobileapp.models.Role
 import com.example.mobileapp.models.User
+import com.example.mobileapp.viewmodels.UsersViewModel
 import com.example.mobileapp.widgets.Header
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.collect
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
@@ -69,9 +80,12 @@ fun UsersScreen() {
 }
 
 @SuppressLint("CoroutineCreationDuringComposition")
-@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun UsersCard(){
+    val sharedPref = PreferencesManager(LocalContext.current)
+    val usersViewModel: UsersViewModel = hiltViewModel<UsersViewModel>()
+    val userListUiState = usersViewModel.getUsersList().collectAsLazyPagingItems()
+
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -97,23 +111,38 @@ fun UsersCard(){
                     .padding(top = 10.dp),
                 textAlign = TextAlign.Center,
             )
-            val users = remember { mutableStateListOf<User> () }
+            if (userListUiState != null){
-            val context = LocalContext.current
-            val scope = rememberCoroutineScope()
-            LaunchedEffect(Unit) {
-                withContext(Dispatchers.IO) {
-                    AppDatabase.getInstance(context).userDao().getAll().collect { data ->
-                        users.addAll(data)
-                    }
-                }
-            }
-
-
                 LazyColumn(
                     modifier = Modifier
                         .fillMaxSize()
                 ) {
-                items(users){ user ->
+                    items(
+                        count = userListUiState.itemCount,
+                        key = userListUiState.itemKey()
+                    ){ index ->
+                        if (userListUiState[index]!!.id != sharedPref.getData("userId", "-1").toInt()){
+                            UserCard(userListUiState[index]!!, usersViewModel)
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@SuppressLint("CoroutineCreationDuringComposition")
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun UserCard (user: User, usersViewModel: UsersViewModel){
+    val scope = rememberCoroutineScope()
+    val roleList = remember { mutableStateListOf(usersViewModel.roles)}
+    var selectedRole by remember { mutableStateOf("")}
+    scope.launch {
+        selectedRole = usersViewModel.getUserRole(user)
+    }
+
+    var expanded by remember { mutableStateOf(false) }
+
     Card(
         shape = RoundedCornerShape(20.dp),
         border = BorderStroke(3.dp, Color(222,161,69)),
@@ -144,23 +173,10 @@ fun UsersCard(){
                 Card(
                     shape = RoundedCornerShape(20.dp),
                     border = BorderStroke(1.dp, Color(222,161,69)),
-                                    modifier = Modifier.fillMaxWidth().padding(bottom = 10.dp),
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(bottom = 10.dp),
                 ){
-                                    val roleList = remember { mutableStateListOf<String>() }
-                                    var expanded by remember { mutableStateOf(false) }
-                                    var selectedRole by remember { mutableStateOf("") }
-
-                                    scope.launch {
-                                        AppDatabase.getInstance(context).roleDao().getAll().collect { data ->
-                                            roleList.clear()
-                                            roleList.addAll(data.map {role ->  role.name})
-                                        }
-                                    }
-                                    scope.launch {
-                                        AppDatabase.getInstance(context).roleDao().getById(user.roleId).collect { data ->
-                                            selectedRole = data.name
-                                        }
-                                    }
                     MaterialTheme(
                         colorScheme = lightColorScheme(
                             surfaceVariant= Color.White,
@@ -176,7 +192,8 @@ fun UsersCard(){
                         ) {
                             TextField(
                                 modifier = Modifier
-                                                    .menuAnchor().fillMaxWidth(),
+                                    .menuAnchor()
+                                    .fillMaxWidth(),
                                 readOnly = true,
                                 value = selectedRole,
                                 onValueChange = {},
@@ -189,8 +206,9 @@ fun UsersCard(){
                                     expanded = false
                                 },
                             ) {
-                                                roleList.forEach { selectionOption ->
+                                roleList.first().forEach {selectionOption ->
                                     DropdownMenuItem(
+
                                         text = { Text(selectionOption) },
                                         onClick = {
                                             selectedRole = selectionOption
@@ -205,7 +223,9 @@ fun UsersCard(){
                 }
             }
             OutlinedButton(
-                                onClick = { /*TODO*/},
+                onClick = {
+                    usersViewModel.changeUserRole(user.id!!, selectedRole)
+                },
                 border = BorderStroke(4.dp, Color(222,161,69)),
                 shape = RoundedCornerShape(10.dp),
                 colors = ButtonDefaults.outlinedButtonColors(Color(255,186,83)),
@@ -219,7 +239,9 @@ fun UsersCard(){
                 )
             }
             OutlinedButton(
-                                onClick = { /*TODO*/},
+                onClick = {
+                    usersViewModel.deleteUser(user.id!!)
+                },
                 border = BorderStroke(4.dp, Color(222,161,69)),
                 shape = RoundedCornerShape(10.dp),
                 colors = ButtonDefaults.outlinedButtonColors(Color(255,186,83)),
@@ -234,8 +256,4 @@ fun UsersCard(){
             }
         }
     }
-                }
-            }
-        }
-    }
 }

app/src/main/java/com/example/mobileapp/viewmodels/AuthorizationViewModel.kt

@@ -0,0 +1,73 @@
+package com.example.mobileapp.viewmodels
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.mobileapp.PreferencesManager
+import com.example.mobileapp.models.Category
+import com.example.mobileapp.models.Role
+import com.example.mobileapp.models.Status
+import com.example.mobileapp.models.User
+import com.example.mobileapp.repositories.CategoryRepository
+import com.example.mobileapp.repositories.RoleRepository
+import com.example.mobileapp.repositories.StatusRepository
+import com.example.mobileapp.repositories.UserRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class AuthorizationViewModel @Inject constructor(
+    private val userRepository: UserRepository,
+    private val categoryRepository: CategoryRepository,
+    private val roleRepository: RoleRepository,
+    private val statusRepository: StatusRepository,
+) : ViewModel() {
+    private val _successState = MutableLiveData<Boolean?>()
+    val successState: LiveData<Boolean?>
+        get() = _successState
+
+    init {
+        addAdmin()
+    }
+
+    fun calmSuccessState() {
+        _successState.postValue(null)
+    }
+
+    fun login(sharedPref: PreferencesManager, login: String, password: String) {
+        viewModelScope.launch {
+            userRepository.getByLoginAndPassword(login, password).collect {
+                if (it == null) {
+                    _successState.postValue(false)
+                } else {
+                    sharedPref.saveData("userId", it.id.toString())
+                    sharedPref.saveData("userRole", roleRepository.getById(it.roleId).first().name)
+                    _successState.postValue(true)
+                }
+            }
+        }
+    }
+
+    private fun addAdmin() {
+        viewModelScope.launch {
+            userRepository.getAll().collect {
+                if (it.size == 0) {
+                    roleRepository.insert(Role(1, "admin"))
+                    roleRepository.insert(Role(2, "worker"))
+                    roleRepository.insert(Role(3, "user"))
+                    statusRepository.insert(Status(1, "Корзина"))
+                    statusRepository.insert(Status(2, "Принят"))
+                    statusRepository.insert(Status(3, "Готов"))
+                    statusRepository.insert(Status(4, "Выдан"))
+                    categoryRepository.insert(Category(1, "Бургеры"))
+                    categoryRepository.insert(Category(2, "Картошка"))
+                    categoryRepository.insert(Category(3, "Напитки"))
+                    userRepository.insert(User(1, "admin", "admin", 1))
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/example/mobileapp/viewmodels/CartViewModel.kt

@@ -0,0 +1,102 @@
+package com.example.mobileapp.viewmodels
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.mobileapp.PreferencesManager
+import com.example.mobileapp.models.OrderProduct
+import com.example.mobileapp.models.OrderWithProducts
+import com.example.mobileapp.models.User
+import com.example.mobileapp.repositories.OrderProductRepository
+import com.example.mobileapp.repositories.OrderRepository
+import com.example.mobileapp.repositories.StatusRepository
+import com.example.mobileapp.repositories.UserRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class CartViewModel @Inject constructor(
+    private val orderRepository: OrderRepository,
+    private val orderProductRepository: OrderProductRepository,
+    private val statusRepository: StatusRepository,
+    private val userRepository: UserRepository
+) : ViewModel() {
+    private val _user = MutableLiveData<User>()
+    val user: LiveData<User>
+        get() = _user
+    private val _cart = MutableLiveData<OrderWithProducts?>()
+    val cart: LiveData<OrderWithProducts?>
+        get() = _cart
+
+    fun retrieveUser(sharedPref: PreferencesManager) {
+        val userId = sharedPref.getData("userId", "-1").toInt()
+
+        if (userId == -1) return
+
+        viewModelScope.launch {
+            userRepository.getById(userId).collect {
+                _user.postValue(it)
+            }
+        }
+        viewModelScope.launch {
+            orderRepository.getCartByUserId(userId).collect{
+                _cart.postValue(it)
+            }
+        }
+    }
+
+    fun makeOrder() {
+        viewModelScope.launch {
+            val model = cart.value!!.order
+            model.statusId = statusRepository.getByName("Принят").first().id!!
+            orderRepository.update(model)
+        }
+    }
+
+    fun removeProductFromOrder(productId: Int) {
+        val orderModel = cart.value!!.order
+        var productModel : OrderProduct? = null
+
+        cart.value!!.orderWithProducts.map {
+            if (it.orderProduct.productId == productId){
+                productModel = it.orderProduct
+                orderModel.price -= it.product.price
+            }
+        }
+
+        if(productModel!!.amount == 1) {
+            // delete
+            viewModelScope.launch {
+                orderRepository.update(orderModel)
+                orderProductRepository.delete(productModel!!)
+            }
+        }
+        else{
+            // update
+            productModel!!.amount -= 1
+            viewModelScope.launch {
+                orderRepository.update(orderModel)
+                orderProductRepository.update(productModel!!)
+            }
+        }
+    }
+    fun addProductToOrder(productId: Int) {
+        val orderModel = cart.value!!.order
+        var productModel : OrderProduct? = null
+        cart.value!!.orderWithProducts.map {
+            if (it.orderProduct.productId == productId){
+                productModel = it.orderProduct
+                orderModel.price += it.product.price
+            }
+        }
+        // update
+        productModel!!.amount += 1
+        viewModelScope.launch {
+            orderRepository.update(orderModel)
+            orderProductRepository.update(productModel!!)
+        }
+    }
+}

app/src/main/java/com/example/mobileapp/viewmodels/MenuViewModel.kt

@@ -0,0 +1,87 @@
+package com.example.mobileapp.viewmodels
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.paging.PagingData
+import com.example.mobileapp.PreferencesManager
+import com.example.mobileapp.models.CategoryWithProducts
+import com.example.mobileapp.models.Order
+import com.example.mobileapp.models.OrderProduct
+import com.example.mobileapp.models.Product
+import com.example.mobileapp.models.User
+import com.example.mobileapp.repositories.CategoryRepository
+import com.example.mobileapp.repositories.OrderProductRepository
+import com.example.mobileapp.repositories.OrderRepository
+import com.example.mobileapp.repositories.ProductRepository
+import com.example.mobileapp.repositories.UserRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+import javax.inject.Inject
+
+@HiltViewModel
+class MenuViewModel @Inject constructor(
+    private val productRepository: ProductRepository,
+    private val orderRepository: OrderRepository,
+    private val orderProductRepository: OrderProductRepository,
+    private val userRepository: UserRepository
+) : ViewModel() {
+    private val _user = MutableLiveData<User>()
+    val user: LiveData<User>
+        get() = _user
+
+    fun retrieveUser(sharedPref: PreferencesManager) {
+        val userId = sharedPref.getData("userId", "-1").toInt()
+
+        if (userId == -1) return
+
+        viewModelScope.launch {
+            userRepository.getById(userId).collect {
+                _user.postValue(it)
+            }
+        }
+    }
+
+    val categoiesWithProductsListUiState: Flow<PagingData<CategoryWithProducts>> = productRepository.getCategoriesWithProducts()
+
+    fun deleteProduct(product : Product) {
+        viewModelScope.launch {
+            productRepository.delete(product)
+        }
+    }
+
+    fun addProductToCart(productId: Int) {
+
+        viewModelScope.launch {
+            val product = productRepository.getById(productId).first()
+            val order = orderRepository.getCartByUserId(user.value?.id!!).first()
+            if (order == null) {
+                val newOrderId = orderRepository.insert(Order(null, user.value?.id!!, product.price, 1 ))
+                orderProductRepository.insert(OrderProduct(newOrderId.toInt(), productId, 1))
+            }
+            else {
+                var isAlreadyAdded = false
+                for (prod in order.orderWithProducts) {
+                    if (prod.product.id == productId) {
+                        val newOrderProduct = prod.orderProduct
+                        newOrderProduct.amount += 1
+                        val newOrder = order.order
+                        newOrder.price += prod.product.price
+                        orderProductRepository.update(newOrderProduct)
+                        orderRepository.update(newOrder)
+                        isAlreadyAdded = true
+                    }
+                }
+                if (!isAlreadyAdded) {
+                    orderProductRepository.insert(OrderProduct(order.order.id!!, productId, 1))
+                    val newOrder = order.order
+                    newOrder.price += product.price
+                    orderRepository.update(newOrder)
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/example/mobileapp/viewmodels/OrderViewModel.kt

@@ -0,0 +1,60 @@
+package com.example.mobileapp.viewmodels
+
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.paging.PagingData
+import com.example.mobileapp.models.OrderWithProducts
+import com.example.mobileapp.repositories.OrderRepository
+import com.example.mobileapp.repositories.StatusRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class OrderViewModel @Inject constructor(
+    private val statusRepository: StatusRepository,
+    private val orderRepository: OrderRepository
+) : ViewModel() {
+    val orderList = MutableLiveData<Flow<PagingData<OrderWithProducts>>>()
+
+    init {
+        updateOrderList()
+    }
+
+    private fun updateOrderList(){
+        orderList.postValue(orderRepository.getOrdersToWork())
+    }
+
+    suspend fun getOrderStatus(statusId: Int) : String{
+        return statusRepository.getById(statusId).first().name
+    }
+
+    fun changeOrderStatus(orderId: Int) {
+        viewModelScope.launch {
+            val order = orderRepository.getById(orderId).first()
+
+            when(statusRepository.getById(order.order.statusId).first().name){
+                "Принят" -> {
+                    val newOrder = order.order
+                    newOrder.statusId = statusRepository.getByName("Готов").first().id!!
+                    orderRepository.update(newOrder)
+                }
+                "Готов" -> {
+                    val newOrder = order.order
+                    newOrder.statusId = statusRepository.getByName("Выдан").first().id!!
+                    orderRepository.update(newOrder)
+                }
+            }
+
+            updateOrderList()
+
+            // для удобства
+            if (orderRepository.getById(orderId).first().order.statusId == 4){
+                orderRepository.delete(orderRepository.getById(orderId).first().order)
+            }
+        }
+    }
+}

app/src/main/java/com/example/mobileapp/viewmodels/ProductViewModel.kt

@@ -0,0 +1,93 @@
+package com.example.mobileapp.viewmodels
+
+import androidx.compose.runtime.mutableStateListOf
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.mobileapp.models.OrderWithProducts
+import com.example.mobileapp.models.Product
+import com.example.mobileapp.models.User
+import com.example.mobileapp.repositories.CategoryRepository
+import com.example.mobileapp.repositories.ProductRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class ProductViewModel @Inject constructor(
+    private val productRepository: ProductRepository,
+    private val categoryRepository: CategoryRepository
+) : ViewModel() {
+    private val _successState = MutableLiveData<Boolean?>()
+    private val _categories = mutableStateListOf<String>()
+    val categories: List<String>
+        get() = _categories
+    val successState: LiveData<Boolean?>
+        get() = _successState
+
+    private val _product = MutableLiveData<Product?>()
+    val product: LiveData<Product?>
+        get() = _product
+
+    fun getProduct(productId: Int) {
+        viewModelScope.launch {
+            _product.postValue(productRepository.getById(productId).first())
+        }
+    }
+
+    init {
+        viewModelScope.launch {
+            categoryRepository.getAll().collect{data ->
+                _categories.addAll(data.map { category -> category.name })
+            }
+        }
+    }
+
+    suspend fun getCategory(categoryId : Int) : String{
+        return categoryRepository.getById(categoryId).first().name
+    }
+
+    fun calmSuccessState() {
+        _successState.postValue(null)
+    }
+
+    fun addProduct(name: String, category: String, price: String) {
+        if (name.isEmpty() || name.length > 10 || name.length < 3){
+            _successState.postValue(false)
+            return
+        }
+        if (category.isEmpty()){
+            _successState.postValue(false)
+            return
+        }
+        if (price.isEmpty() || price.toIntOrNull() == null){
+            _successState.postValue(false)
+            return
+        }
+        viewModelScope.launch {
+            productRepository.insert(Product(null, name, categoryRepository.getByName(category).first().id!!, price.toInt()))
+            _successState.postValue(true)
+        }
+    }
+
+    fun updateProduct(id: Int, name: String, category: String, price: String) {
+        if (name.isEmpty() || name.length > 10 || name.length < 3){
+            _successState.postValue(false)
+            return
+        }
+        if (category.isEmpty()){
+            _successState.postValue(false)
+            return
+        }
+        if (price.isEmpty() || price.toIntOrNull() == null){
+            _successState.postValue(false)
+            return
+        }
+        viewModelScope.launch {
+            productRepository.update(Product(id, name, categoryRepository.getByName(category).first().id!!, price.toInt()))
+            _successState.postValue(true)
+        }
+    }
+}

app/src/main/java/com/example/mobileapp/viewmodels/ProfileViewModel.kt

@@ -0,0 +1,42 @@
+package com.example.mobileapp.viewmodels
+
+import androidx.compose.ui.platform.LocalContext
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.VIEW_MODEL_STORE_OWNER_KEY
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.paging.Pager
+import androidx.paging.PagingData
+import com.example.mobileapp.PreferencesManager
+import com.example.mobileapp.models.CategoryWithProducts
+import com.example.mobileapp.models.OrderWithProducts
+import com.example.mobileapp.models.User
+import com.example.mobileapp.repositories.OrderRepository
+import com.example.mobileapp.repositories.StatusRepository
+import com.example.mobileapp.repositories.UserRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class ProfileViewModel @Inject constructor(
+    private val orderRepository: OrderRepository,
+    private val statusRepository: StatusRepository
+) : ViewModel() {
+    fun getActiveOrders(userId : Int) : Flow<PagingData<OrderWithProducts>>? {
+        if (userId == -1) return null
+        return orderRepository.getOrdersByUserId(userId)
+    }
+
+    suspend fun getOrderStatus(statusId: Int) : String{
+        return statusRepository.getById(statusId).first().name
+    }
+
+    fun logout(sharedPref: PreferencesManager) {
+        sharedPref.deleteData("userId")
+        sharedPref.deleteData("userRole")
+    }
+}

app/src/main/java/com/example/mobileapp/viewmodels/RegistrationViewModel.kt

@@ -0,0 +1,52 @@
+package com.example.mobileapp.viewmodels
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.mobileapp.models.User
+import com.example.mobileapp.repositories.UserRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class RegistrationViewModel @Inject constructor(
+    private val userRepository: UserRepository
+) : ViewModel() {
+    private val _successState = MutableLiveData<Boolean?>()
+    val successState: LiveData<Boolean?>
+        get() = _successState
+
+    fun calmSuccessState() {
+        _successState.postValue(null)
+    }
+
+    fun registration(login: String, password: String, confirmPassword: String) {
+        if (login.length < 3 || login.length > 20) {
+            _successState.postValue(false)
+            return
+        }
+
+        if (password.length < 3 || password.length > 20) {
+            _successState.postValue(false)
+            return
+        }
+
+        if (password != confirmPassword) {
+            _successState.postValue(false)
+            return
+        }
+
+        viewModelScope.launch {
+            userRepository.getByLoginAndPassword(login, password).collect {
+                if (it != null) {
+                    _successState.postValue(false)
+                } else {
+                    userRepository.insert(User(null, login, password, 3))
+                    _successState.postValue(true)
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/example/mobileapp/viewmodels/UsersViewModel.kt

@@ -0,0 +1,83 @@
+package com.example.mobileapp.viewmodels
+
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.remember
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import androidx.paging.PagingData
+import com.example.mobileapp.PreferencesManager
+import com.example.mobileapp.models.OrderWithProducts
+import com.example.mobileapp.models.Role
+import com.example.mobileapp.models.User
+import com.example.mobileapp.repositories.OrderRepository
+import com.example.mobileapp.repositories.RoleRepository
+import com.example.mobileapp.repositories.StatusRepository
+import com.example.mobileapp.repositories.UserRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.cancellable
+import kotlinx.coroutines.flow.collect
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class UsersViewModel @Inject constructor(
+    private val roleRepository: RoleRepository,
+    private val userRepository: UserRepository
+) : ViewModel() {
+    private val _roles = mutableStateListOf<String>()
+    val roles: List<String>
+        get() = _roles
+
+    init {
+        viewModelScope.launch {
+            roleRepository.getAll().collect{data ->
+                _roles.addAll(data.map { role -> role.name })
+            }
+        }
+    }
+
+    fun getUsersList() : Flow<PagingData<User>> {
+        return userRepository.getAllPaged()
+    }
+
+    suspend fun getUserRole(user: User) : String {
+        return roleRepository.getById(user.roleId).first().name
+    }
+
+    fun changeUserRole(userId: Int, roleName: String) {
+        viewModelScope.launch {
+            val user = userRepository.getById(userId).first()
+
+            when(roleName){
+                "user" -> {
+                    val newUser = user
+                    user.roleId = roleRepository.getByName("user").first().id!!
+                    userRepository.update(newUser)
+                }
+                "worker" -> {
+                    val newUser = user
+                    user.roleId = roleRepository.getByName("worker").first().id!!
+                    userRepository.update(newUser)
+                }
+                "admin" -> {
+                    val newUser = user
+                    user.roleId = roleRepository.getByName("admin").first().id!!
+                    userRepository.update(newUser)
+                }
+            }
+        }
+    }
+
+    fun deleteUser(userId: Int){
+        viewModelScope.launch{
+            userRepository.delete(userRepository.getById(userId).first())
+        }
+    }
+}

build.gradle.kts

@@ -2,4 +2,5 @@
 plugins {
     id("com.android.application") version "8.1.1" apply false
     id("org.jetbrains.kotlin.android") version "1.8.10" apply false
+    id("com.google.dagger.hilt.android") version "2.44" apply false
 }