ViewModel заказов

app/src/main/java/com/example/shawarma/data/interfaces/dao/OrderDao.kt

@@ -24,4 +24,6 @@ interface OrderDao {
     fun getByUserId(userId: Int): Flow<List<OrderWithProducts>>
     @Query("select * from orders where orders.user_id =:userId and orders.order_status = 'Неоплачено'")
     fun getUnpaidByUser(userId: Int) : Flow<OrderWithProducts>
+    @Query("select * from orders where orders.user_id =:userId and orders.order_status = 'Готовится'")
+    fun getPaidByUser(userId: Int) : Flow<List<OrderWithProducts>>
 }

app/src/main/java/com/example/shawarma/data/interfaces/dao/OrderProductDao.kt

@@ -1,6 +1,7 @@
 package com.example.shawarma.data.interfaces.dao
 
 import androidx.room.Dao
+import androidx.room.Delete
 import androidx.room.Insert
 import androidx.room.Query
 import androidx.room.Update
@@ -11,7 +12,8 @@ interface OrderProductDao {
     suspend fun insert(order: OrderProductModel)
     @Update
     suspend fun update(order: OrderProductModel)
-
     @Query("delete from order_product WHERE product_id = :productId")
     suspend fun deleteByProductId(productId: Int);
+    @Delete
+    suspend fun delete(order: OrderProductModel)
 }

app/src/main/java/com/example/shawarma/data/models/OrderModel.kt

@@ -21,7 +21,7 @@ data class OrderModel(
     @ColumnInfo(name = "id")
     val id: Int?,
     @ColumnInfo(name = "order_status")
-    val status: String,
+    var status: String,
     @ColumnInfo(name = "user_id", index = true)
     val userId: Int?,
     @ColumnInfo(name = "date")

app/src/main/java/com/example/shawarma/data/repos/OrderProductRepository.kt

@@ -13,4 +13,8 @@ class OrderProductRepository @Inject constructor(
     suspend fun update(order: OrderProductModel) {
         return orderProductDao.update(order)
     }
+    suspend fun delete(order: OrderProductModel) {
+        return orderProductDao.delete(order)
+    }
+
 }

app/src/main/java/com/example/shawarma/data/repos/OrderRepository.kt

@@ -30,4 +30,7 @@ class OrderRepository @Inject constructor(
     fun getUnpaidByUser(userId: Int) : Flow<OrderWithProducts?> {
         return orderDao.getUnpaidByUser(userId)
     }
+    fun getPaidByUser(userId: Int) : Flow<List<OrderWithProducts>> {
+        return orderDao.getPaidByUser(userId)
+    }
 }

app/src/main/java/com/example/shawarma/screens/cart/CartScreen.kt

@@ -7,6 +7,7 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
@@ -20,12 +21,9 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.Button
 import androidx.compose.material.ButtonDefaults
 import androidx.compose.material.Card
-import androidx.compose.material.Icon
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.MutableState
-import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
@@ -33,23 +31,20 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.zIndex
-import com.example.shawarma.R
-import com.example.shawarma.data.db.AppDatabase
-import com.example.shawarma.data.models.OrderStatus
+import androidx.hilt.navigation.compose.hiltViewModel
 import com.example.shawarma.data.models.OrderWithProducts
+import com.example.shawarma.data.sharedpref.PreferencesManager
 import com.example.shawarma.ui.theme.MarckFamily
-import com.example.shawarma.ui.theme.MyLightRed
+import com.example.shawarma.ui.theme.MyLightYellow
 import com.example.shawarma.ui.theme.MyMainBackground
 import com.example.shawarma.ui.theme.MyOrange
 import com.example.shawarma.ui.theme.NunitoFamily
+import com.example.shawarma.viewmodels.CartViewModel
 import com.example.shawarma.widgets.ShawarmaLogo2
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 
 @Composable
 fun CartScreen() {
@@ -63,29 +58,13 @@ fun CartScreen() {
 
 @Composable
 fun CartWidget(){
+    val preferencesManager = PreferencesManager(LocalContext.current)
 
-    val context = LocalContext.current
-    val orders = remember { mutableStateListOf<OrderWithProducts>() }
-    LaunchedEffect(Unit) {
-        withContext(Dispatchers.IO) {
-            AppDatabase.getInstance(context).orderDao().getByUserId(1).collect { data ->
-                orders.clear()
-                orders.addAll(data)
-            }
-        }
-    }
+    val cartViewModel: CartViewModel = hiltViewModel<CartViewModel>()
+    cartViewModel.getOrders(preferencesManager.getData("user_id", "null"))
 
-    var unpaidOrder: OrderWithProducts? = null
-    val preparingOrders = mutableListOf<OrderWithProducts>()
-
-    for(order in orders) {
-        if (order.order.status == OrderStatus.Неоплачено.toString()) {
-            unpaidOrder = order
-        }
-        if (order.order.status == OrderStatus.Готовится.toString() || order.order.status == OrderStatus.Готово.toString()) {
-            preparingOrders.add(order)
-        }
-    }
+    var unpaidOrder: OrderWithProducts? = cartViewModel.unpaidOrder.observeAsState().value
+    val preparingOrders = cartViewModel.paidOrders.observeAsState().value
 
     Box(
         modifier = Modifier
@@ -94,7 +73,6 @@ fun CartWidget(){
             .fillMaxSize()
             .background(color = MyMainBackground)
             .zIndex(2f),
-
         contentAlignment = Alignment.TopCenter
     ) {
         Text(
@@ -110,7 +88,6 @@ fun CartWidget(){
                 .padding(top = 55.dp)
                 .verticalScroll(rememberScrollState())
         ) {
-
             Text(
                 text = "Оплачено:",
                 fontFamily = NunitoFamily,
@@ -123,8 +100,10 @@ fun CartWidget(){
                     .width(340.dp)
                     .height(200.dp)
             ) {
-                items(preparingOrders.size) { index ->
+                if (preparingOrders != null) {
+                    items(preparingOrders.size) { index ->
                         PaidItem(preparingOrders[index])
+                    }
                 }
             }
             Text(
@@ -137,9 +116,7 @@ fun CartWidget(){
             if (unpaidOrder != null) {
                 CartItem(order = unpaidOrder)
             }
-
             Spacer(modifier = Modifier.height(20.dp))
-
             Button(
                 colors = ButtonDefaults.buttonColors(
                     backgroundColor = Color(0xFF91FF87)
@@ -147,7 +124,11 @@ fun CartWidget(){
                 shape = RoundedCornerShape(20.dp),
                 border = BorderStroke(2.dp, Color(0x66000000)),
                 modifier = Modifier.size(240.dp, 60.dp),
-                onClick = { /*TODO*/ }
+                onClick = {
+                    if (unpaidOrder != null) {
+                        cartViewModel.payForOrder(unpaidOrder)
+                    }
+                }
             ) {
                 Text(
                     "Оплатить",
@@ -156,10 +137,7 @@ fun CartWidget(){
                     fontWeight = FontWeight(700),
                 )
             }
-
             Spacer(modifier = Modifier.height(70.dp))
-
-
         }
     }
 }
@@ -170,63 +148,65 @@ fun PaidItem(order : OrderWithProducts) {
         border = BorderStroke(width = 2.dp, color = MyOrange),
         shape = RoundedCornerShape(size = 20.dp),
         backgroundColor = Color.White,
-        modifier = Modifier.size(340.dp, 100.dp)
+        modifier = Modifier.size(340.dp, 150.dp)
     )  {
-        LazyColumn {
+        Row(
+            horizontalArrangement = Arrangement.SpaceBetween,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(start = 20.dp, end = 20.dp)
+        ){
+            Text(
+                text = "Статус: ",
+                fontFamily = NunitoFamily,
+                fontSize = 20.sp,
+                modifier = Modifier.padding(top = 15.dp),
+                fontWeight = FontWeight.Bold,
+                color = Color.Gray
+            )
+            Text(
+                text = order.order.status,
+                fontFamily = NunitoFamily,
+                fontSize = 20.sp,
+                modifier = Modifier.padding(top = 15.dp),
+                fontWeight = FontWeight.Bold,
+                color = Color.Gray
+            )
+        }
+        LazyColumn(
+            modifier = Modifier.padding(top = 40.dp)
+        ) {
             items(order.orderWithProducts.size) { index ->
-                if (index == 0) {
+                if (order.orderWithProducts.isNotEmpty()) {
                     Row(
                         horizontalArrangement = Arrangement.SpaceBetween,
                         modifier = Modifier
                             .fillMaxWidth()
-                            .padding(start = 20.dp, end = 20.dp)
-                    ){
+                            .padding(horizontal = 20.dp)
+                    ) {
                         Text(
-                            text = "Статус: ",
+                            text = order.orderWithProducts[index].product.title,
                             fontFamily = NunitoFamily,
                             fontSize = 20.sp,
                             modifier = Modifier.padding(top = 15.dp),
-                            fontWeight = FontWeight.Bold,
-                            color = Color.Gray
+                            fontWeight = FontWeight.Bold
                         )
                         Text(
-                            text = order.order.status,
+                            text = "x" + order.orderWithProducts[index].orderProductModel.quantity,
                             fontFamily = NunitoFamily,
                             fontSize = 20.sp,
                             modifier = Modifier.padding(top = 15.dp),
-                            fontWeight = FontWeight.Bold,
-                            color = Color.Gray
+                            fontWeight = FontWeight.Bold
+                        )
+                        Text(
+                            text = order.orderWithProducts[index].orderProductModel.totalPrice.toString() + " руб.",
+                            fontFamily = NunitoFamily,
+                            fontSize = 20.sp,
+                            modifier = Modifier.padding(top = 15.dp),
+                            fontWeight = FontWeight.Bold
                         )
                     }
                 }
-                Row(
-                    horizontalArrangement = Arrangement.SpaceBetween,
-                    modifier = Modifier
-                        .fillMaxWidth()
-                        .padding(horizontal = 20.dp)
-                ) {
-                    Text(
-                        text = order.orderWithProducts[index].product.title,
-                        fontFamily = NunitoFamily,
-                        fontSize = 20.sp,
-                        modifier = Modifier.padding(top = 15.dp),
-                        fontWeight = FontWeight.Bold
-                    )
-                    Text(
-                        text = "x" + order.orderWithProducts[index].orderProductModel.quantity,
-                        fontFamily = NunitoFamily,
-                        fontSize = 20.sp,
-                        modifier = Modifier.padding(top = 15.dp),
-                        fontWeight = FontWeight.Bold
-                    )
-                    Text(
-                        text = order.orderWithProducts[index].orderProductModel.totalPrice.toString() + " руб.",
-                        fontFamily = NunitoFamily,
-                        fontSize = 20.sp,
-                        modifier = Modifier.padding(top = 15.dp),
-                        fontWeight = FontWeight.Bold
-                    )
-                }
             }
         }
     }
@@ -235,6 +215,8 @@ fun PaidItem(order : OrderWithProducts) {
 
 @Composable
 fun CartItem(order : OrderWithProducts) {
+    val cartViewModel: CartViewModel = hiltViewModel<CartViewModel>()
+
     Card(
         border = BorderStroke(width = 2.dp, color = MyOrange),
         shape = RoundedCornerShape(size = 20.dp),
@@ -245,13 +227,17 @@ fun CartItem(order : OrderWithProducts) {
             horizontalAlignment = Alignment.CenterHorizontally
         ) {
             items(order.orderWithProducts.size) {index ->
+                var count = remember { mutableStateOf(0)}
+                count.value = order.orderWithProducts[index].orderProductModel.quantity
                 Row(
                     verticalAlignment = Alignment.CenterVertically,
                     horizontalArrangement = Arrangement.SpaceBetween,
-                    modifier = Modifier.padding(20.dp).size(340.dp, 60.dp)
+                    modifier = Modifier
+                        .padding(20.dp)
+                        .size(340.dp, 80.dp)
                 ) {
                     Column(
-                        modifier = Modifier.fillMaxWidth(0.5f)
+                        modifier = Modifier.fillMaxWidth()
                     ) {
                         Row(
                             horizontalArrangement = Arrangement.SpaceBetween,
@@ -264,39 +250,70 @@ fun CartItem(order : OrderWithProducts) {
                                 fontWeight = FontWeight.Bold
                             )
                             Text(
-                                text = "x" + order.orderWithProducts[index].orderProductModel.quantity,
+                                text = order.orderWithProducts[index].orderProductModel.totalPrice.toString() + " руб.",
+                                fontFamily = NunitoFamily,
+                                fontSize = 18.sp,
+                                fontWeight = FontWeight.Bold
+                            )
+                        }
+                        Row(
+                            horizontalArrangement = Arrangement.SpaceBetween,
+                            verticalAlignment = Alignment.CenterVertically,
+                            modifier = Modifier
+                                .fillMaxWidth()
+                        ) {
+                            Button(
+                                colors = ButtonDefaults.buttonColors(
+                                    backgroundColor = MyLightYellow
+                                ),
+                                shape = RoundedCornerShape(size = 20.dp),
+                                modifier = Modifier
+                                    .fillMaxHeight()
+                                    .weight(1f)
+                                    .fillMaxSize(0.5f),
+                                onClick = {
+                                    cartViewModel.removeProductFromOrder(order, index)
+                                    count.value -= 1
+                                }
+                            ) {
+                                Text(
+                                    text = "-",
+                                    fontSize = 18.sp,
+                                    fontWeight = FontWeight.Bold
+                                )
+                            }
+                            Spacer(modifier = Modifier.fillMaxWidth(0.2f))
+                            Text(
+                                text = "x" + count.value + " ",
                                 fontFamily = NunitoFamily,
                                 fontSize = 20.sp,
                                 fontWeight = FontWeight.Bold
                             )
+                            Spacer(modifier = Modifier.fillMaxWidth(0.2f))
+                            Button(
+                                colors = ButtonDefaults.buttonColors(
+                                    backgroundColor = MyLightYellow
+                                ),
+                                shape = RoundedCornerShape(size = 20.dp),
+                                modifier = Modifier
+                                    .fillMaxHeight()
+                                    .weight(1f)
+                                    .fillMaxSize(0.5f),
+                                onClick = {
+                                    cartViewModel.addProductToOrder(order, index)
+                                    count.value += 1
+                                }
+                            ) {
+                                Text(
+                                    text = "+",
+                                    fontSize = 18.sp,
+                                    fontWeight = FontWeight.Bold
+                                )
+                            }
                         }
-                        Text(
-                            text = order.orderWithProducts[index].orderProductModel.totalPrice.toString() + " руб.",
-                            fontFamily = NunitoFamily,
-                            fontSize = 20.sp,
-                            fontWeight = FontWeight.Bold
-                        )
                     }
-                    Button(
-                        colors = ButtonDefaults.buttonColors(
-                            backgroundColor = MyLightRed
-                        ),
-                        shape = RoundedCornerShape(size = 10.dp),
-                        modifier = Modifier
-                            .size(100.dp, 60.dp)
-                            .fillMaxSize(0.5f),
-                        onClick = { /*TODO*/ }
-                    ) {
-                        Icon(
-                            painter = painterResource(id = R.drawable.trash),
-                            contentDescription = "Delete",
-                            modifier = Modifier.size(42.dp)
-                        )
-                    }
-
                 }
             }
-
         }
     }
 }

app/src/main/java/com/example/shawarma/screens/discount/DiscountScreen.kt

@@ -20,9 +20,7 @@ import androidx.compose.material.ButtonDefaults
 import androidx.compose.material.Card
 import androidx.compose.material.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.livedata.observeAsState
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -34,18 +32,18 @@ import androidx.compose.ui.text.style.TextDecoration
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.zIndex
+import androidx.hilt.navigation.compose.hiltViewModel
 import com.example.shawarma.R
-import com.example.shawarma.data.db.AppDatabase
 import com.example.shawarma.data.models.ProductModel
+import com.example.shawarma.data.sharedpref.PreferencesManager
 import com.example.shawarma.ui.theme.MarckFamily
 import com.example.shawarma.ui.theme.MyLightYellow
 import com.example.shawarma.ui.theme.MyMainBackground
 import com.example.shawarma.ui.theme.MyOrange
 import com.example.shawarma.ui.theme.MyPriceBackground
 import com.example.shawarma.ui.theme.NunitoFamily
+import com.example.shawarma.viewmodels.HomeViewModel
 import com.example.shawarma.widgets.ShawarmaLogo2
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 
 @Composable
 fun DiscountScreen() {
@@ -60,17 +58,9 @@ fun DiscountScreen() {
 
 @Composable
 fun DiscountList(){
+    val homeViewModel: HomeViewModel = hiltViewModel<HomeViewModel>()
 
-    val context = LocalContext.current
-    val products = remember { mutableStateListOf<ProductModel>() }
-    LaunchedEffect(Unit) {
-        withContext(Dispatchers.IO) {
-            AppDatabase.getInstance(context).productDao().getDiscounts().collect { data ->
-                products.clear()
-                products.addAll(data)
-            }
-        }
-    }
+    val products = homeViewModel.discounts.observeAsState().value
 
     Box(
         modifier = Modifier
@@ -93,19 +83,9 @@ fun DiscountList(){
             modifier = Modifier.padding(top = 80.dp)
         )
         {
-            items(products.size) { index ->
-                if (index % 2 == 0 && index == products.size - 1) {
-                    Row(
-                        horizontalArrangement = Arrangement.SpaceAround,
-                        modifier = Modifier
-                            .fillMaxWidth()
-                            .padding(top = 10.dp)
-                    ) {
-                        DiscountCard(products[index])
-                    }
-                }
-                else {
-                    if (index % 2 != 1) {
+            if (products != null) {
+                items(products.size) { index ->
+                    if (index % 2 == 0 && index == products.size - 1) {
                         Row(
                             horizontalArrangement = Arrangement.SpaceAround,
                             modifier = Modifier
@@ -113,12 +93,23 @@ fun DiscountList(){
                                 .padding(top = 10.dp)
                         ) {
                             DiscountCard(products[index])
-                            DiscountCard(products[index+1])
+                        }
+                    } else {
+                        if (index % 2 != 1) {
+                            Row(
+                                horizontalArrangement = Arrangement.SpaceAround,
+                                modifier = Modifier
+                                    .fillMaxWidth()
+                                    .padding(top = 10.dp)
+                            ) {
+                                DiscountCard(products[index])
+                                DiscountCard(products[index+1])
+                            }
                         }
                     }
-                }
-                if (index == products.size - 1) {
-                    Spacer(modifier = Modifier.height(70.dp))
+                    if (index == products.size - 1) {
+                        Spacer(modifier = Modifier.height(70.dp))
+                    }
                 }
             }
         }
@@ -127,6 +118,8 @@ fun DiscountList(){
 
 @Composable
 fun DiscountCard(product : ProductModel){
+    val homeViewModel: HomeViewModel = hiltViewModel<HomeViewModel>()
+    val preferencesManager = PreferencesManager(LocalContext.current)
     Card(
         shape = RoundedCornerShape(20.dp),
         backgroundColor = Color.White,
@@ -181,7 +174,9 @@ fun DiscountCard(product : ProductModel){
                     }
 
                     Button(
-                        onClick = { /*TODO*/ },
+                        onClick = {
+                            product.id?.let { homeViewModel.addProductToCart(it, preferencesManager.getData("user_id", "null")) }
+                        },
                         colors = ButtonDefaults.buttonColors(
                             backgroundColor = MyLightYellow,
                             contentColor = Color.Black

app/src/main/java/com/example/shawarma/screens/orders/OrdersScreen.kt

@@ -5,8 +5,6 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.ExperimentalLayoutApi
-import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -22,31 +20,31 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.Button
 import androidx.compose.material.ButtonDefaults
 import androidx.compose.material.Card
+import androidx.compose.material.Icon
 import androidx.compose.material.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.livedata.observeAsState
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.zIndex
-import com.example.shawarma.data.db.AppDatabase
+import androidx.hilt.navigation.compose.hiltViewModel
+import com.example.shawarma.R
 import com.example.shawarma.data.models.OrderStatus
 import com.example.shawarma.data.models.OrderWithProducts
 import com.example.shawarma.ui.theme.MarckFamily
+import com.example.shawarma.ui.theme.MyLightRed
 import com.example.shawarma.ui.theme.MyLightYellow
 import com.example.shawarma.ui.theme.MyMainBackground
 import com.example.shawarma.ui.theme.MyOrange
 import com.example.shawarma.ui.theme.NunitoFamily
+import com.example.shawarma.viewmodels.OrdersViewModel
 import com.example.shawarma.widgets.ShawarmaLogo2
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 import java.text.SimpleDateFormat
 
 @Composable
@@ -61,33 +59,11 @@ fun OrdersScreen() {
 
 @Composable
 fun OrdersList(){
-    val context = LocalContext.current
-    val allOrders = remember { mutableStateListOf<OrderWithProducts>() }
-    LaunchedEffect(Unit) {
-        withContext(Dispatchers.IO) {
-            AppDatabase.getInstance(context).orderDao().getAll().collect { data ->
-                allOrders.clear()
-                allOrders.addAll(data)
-            }
-        }
-    }
-
-    val preparingOrders = mutableListOf<OrderWithProducts>()
-    val preparedOrders = mutableListOf<OrderWithProducts>()
-    val processedOrders = mutableListOf<OrderWithProducts>()
-
-    for (order in allOrders){
-        if (order.order.status == OrderStatus.Готовится.toString()) {
-            preparingOrders.add(order)
-        }
-        if (order.order.status == OrderStatus.Готово.toString()) {
-            preparedOrders.add(order)
-        }
-        if (order.order.status == OrderStatus.Выдано.toString()) {
-            processedOrders.add(order)
-        }
-    }
+    val ordersViewModel = hiltViewModel<OrdersViewModel>()
 
+    val preparingOrders = ordersViewModel.preparingOrders.observeAsState().value
+    val preparedOrders = ordersViewModel.preparedOrders.observeAsState().value
+    val processedOrders = ordersViewModel.processedOrders.observeAsState().value
 
     Box(
         modifier = Modifier
@@ -125,10 +101,11 @@ fun OrdersList(){
                     .width(340.dp)
                     .height(250.dp)
             ) {
-                if (preparingOrders.size != 0) {
-                    items(preparingOrders.size) {
-                            index ->
-                        PreparingItem(preparingOrders[index])
+                if (preparingOrders != null) {
+                    if (preparingOrders.isNotEmpty()) {
+                        items(preparingOrders.size) { index ->
+                            PreparingItem(preparingOrders[index])
+                        }
                     }
                 }
             }
@@ -144,10 +121,11 @@ fun OrdersList(){
                     .width(340.dp)
                     .height(250.dp)
             ) {
-                if (preparedOrders.size != 0) {
-                    items(preparedOrders.size) {
-                            index ->
-                        PreparedItem(preparedOrders[index])
+                if (preparedOrders != null) {
+                    if (preparedOrders.isNotEmpty()) {
+                        items(preparedOrders.size) { index ->
+                            PreparedItem(preparedOrders[index])
+                        }
                     }
                 }
             }
@@ -163,9 +141,11 @@ fun OrdersList(){
                     .width(340.dp)
                     .height(250.dp)
             ) {
-                if (processedOrders.size != 0) {
-                    items(processedOrders.size) {index ->
-                        ProcessedItem(processedOrders[index])
+                if (processedOrders != null) {
+                    if (processedOrders.isNotEmpty()) {
+                        items(processedOrders.size) {index ->
+                            ProcessedItem(processedOrders[index])
+                        }
                     }
                 }
             }
@@ -178,6 +158,8 @@ fun OrdersList(){
 
 @Composable
 fun PreparingItem(order : OrderWithProducts){
+    val ordersViewModel = hiltViewModel<OrdersViewModel>()
+
     Card(
         border = BorderStroke(width = 2.dp, color = MyOrange),
         shape = RoundedCornerShape(size = 20.dp),
@@ -190,7 +172,9 @@ fun PreparingItem(order : OrderWithProducts){
             Row(
                 verticalAlignment = Alignment.CenterVertically,
                 horizontalArrangement = Arrangement.SpaceBetween,
-                modifier = Modifier.padding(20.dp).size(340.dp,60.dp)
+                modifier = Modifier
+                    .padding(20.dp)
+                    .size(340.dp, 60.dp)
             ){
                 Column(
                     modifier = Modifier.fillMaxWidth(0.5f)
@@ -213,7 +197,9 @@ fun PreparingItem(order : OrderWithProducts){
                     modifier = Modifier
                         .size(170.dp, 80.dp)
                         .fillMaxSize(),
-                    onClick = { /*TODO*/ }
+                    onClick = {
+                        ordersViewModel.changeOrderStatus(order, OrderStatus.Готово.name)
+                    }
                 ) {
                     Text(
                         text = "Готово!",
@@ -226,7 +212,9 @@ fun PreparingItem(order : OrderWithProducts){
             }
 
             LazyColumn(
-                modifier = Modifier.fillMaxWidth().padding(horizontal = 20.dp)
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 20.dp)
             ){
                 items(order.orderWithProducts.size) {index ->
                     Row(
@@ -257,6 +245,8 @@ fun PreparingItem(order : OrderWithProducts){
 
 @Composable
 fun PreparedItem(order : OrderWithProducts){
+    val ordersViewModel = hiltViewModel<OrdersViewModel>()
+
     Card(
         border = BorderStroke(width = 2.dp, color = MyOrange),
         shape = RoundedCornerShape(size = 20.dp),
@@ -269,7 +259,9 @@ fun PreparedItem(order : OrderWithProducts){
             Row(
                 verticalAlignment = Alignment.CenterVertically,
                 horizontalArrangement = Arrangement.SpaceBetween,
-                modifier = Modifier.padding(20.dp).size(340.dp,60.dp)
+                modifier = Modifier
+                    .padding(20.dp)
+                    .size(340.dp, 60.dp)
             ){
                 Column(
                     modifier = Modifier.fillMaxWidth(0.5f)
@@ -292,7 +284,9 @@ fun PreparedItem(order : OrderWithProducts){
                     modifier = Modifier
                         .size(170.dp, 80.dp)
                         .fillMaxSize(),
-                    onClick = { /*TODO*/ }
+                    onClick = {
+                        ordersViewModel.changeOrderStatus(order, OrderStatus.Выдано.name)
+                    }
                 ) {
                     Text(
                         text = "Выдано!",
@@ -305,7 +299,9 @@ fun PreparedItem(order : OrderWithProducts){
             }
 
             LazyColumn(
-                modifier = Modifier.fillMaxWidth().padding(horizontal = 20.dp)
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 20.dp)
             ){
                 items(order.orderWithProducts.size) {index ->
                     Row(
@@ -336,6 +332,8 @@ fun PreparedItem(order : OrderWithProducts){
 
 @Composable
 fun ProcessedItem(order : OrderWithProducts){
+    val ordersViewModel = hiltViewModel<OrdersViewModel>()
+
     Card(
         border = BorderStroke(width = 2.dp, color = MyOrange),
         shape = RoundedCornerShape(size = 20.dp),
@@ -348,10 +346,12 @@ fun ProcessedItem(order : OrderWithProducts){
             Row(
                 verticalAlignment = Alignment.CenterVertically,
                 horizontalArrangement = Arrangement.SpaceBetween,
-                modifier = Modifier.padding(20.dp).size(340.dp,60.dp)
+                modifier = Modifier
+                    .padding(20.dp)
+                    .size(340.dp, 60.dp)
             ){
                 Column(
-                    modifier = Modifier.fillMaxWidth(0.5f)
+                    modifier = Modifier.fillMaxWidth(0.3f)
                 ){
                     val localDateFormat = SimpleDateFormat("HH:mm")
                     val time = localDateFormat.format(order.order.date)
@@ -364,7 +364,7 @@ fun ProcessedItem(order : OrderWithProducts){
 
                 }
                 Column(
-                    modifier = Modifier.fillMaxWidth(0.5f)
+                    modifier = Modifier.fillMaxWidth(0.3f)
                 ){
                     Text(
                         text = order.order.date.toString(),
@@ -373,11 +373,29 @@ fun ProcessedItem(order : OrderWithProducts){
                         fontWeight = FontWeight.Bold
                     )
                 }
+                Button(
+                    modifier = Modifier
+                        .size(80.dp)
+                    ,
+                    colors = ButtonDefaults.buttonColors(MyLightRed),
+                    shape = RoundedCornerShape(20.dp),
+                    onClick = {
+                        ordersViewModel.deleteOrder(order)
+                    }
+                ) {
+                    Icon(
+                        painter = painterResource(id = R.drawable.trash),
+                        contentDescription = "trash",
+                        modifier = Modifier.size(80.dp)
+                    )
+                }
 
             }
 
             LazyColumn(
-                modifier = Modifier.fillMaxWidth().padding(horizontal = 20.dp)
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 20.dp)
             ){
                 items(order.orderWithProducts.size) {index ->
                     Row(

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

@@ -0,0 +1,73 @@
+package com.example.shawarma.viewmodels
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.shawarma.data.models.OrderStatus
+import com.example.shawarma.data.models.OrderWithProducts
+import com.example.shawarma.data.repos.OrderProductRepository
+import com.example.shawarma.data.repos.OrderRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class CartViewModel @Inject constructor(
+    private val orderRepository: OrderRepository,
+    private val orderProductRepository: OrderProductRepository
+) : ViewModel(){
+    private val _unpaidOrder = MutableLiveData<OrderWithProducts>()
+    val unpaidOrder: LiveData<OrderWithProducts>
+        get() = _unpaidOrder
+    private val _paidOrders = MutableLiveData<List<OrderWithProducts>>()
+    val paidOrders: LiveData<List<OrderWithProducts>>
+        get() = _paidOrders
+
+    fun getOrders(userId: String) {
+        if (userId == "null") return
+        viewModelScope.launch {
+            orderRepository.getUnpaidByUser(userId.toInt()).collect {
+                _unpaidOrder.postValue(it)
+            }
+        }
+        viewModelScope.launch {
+            orderRepository.getPaidByUser(userId.toInt()).collect {
+                _paidOrders.postValue(it)
+            }
+        }
+    }
+    fun payForOrder(order: OrderWithProducts) {
+        val model = order.order
+        model.status = OrderStatus.Готовится.name
+        viewModelScope.launch {
+            orderRepository.update(model)
+        }
+    }
+
+    fun removeProductFromOrder(order: OrderWithProducts, productId: Int) {
+        val model = order.orderWithProducts[productId].orderProductModel
+        if(model.quantity == 1) {
+            // delete
+            viewModelScope.launch {
+                orderProductRepository.delete(model)
+            }
+        }
+        else{
+            // update
+            model.quantity -= 1
+            viewModelScope.launch {
+                orderProductRepository.update(model)
+            }
+        }
+    }
+    fun addProductToOrder(order: OrderWithProducts, productId: Int) {
+        val model = order.orderWithProducts[productId].orderProductModel
+        // update
+        model.quantity += 1
+        viewModelScope.launch {
+            orderProductRepository.update(model)
+        }
+
+    }
+}

app/src/main/java/com/example/shawarma/viewmodels/HomeViewModel.kt

@@ -27,12 +27,21 @@ class HomeViewModel @Inject constructor(
     val products: LiveData<List<ProductModel>>
         get() = _products
 
+    private val _discounts=  MutableLiveData<List<ProductModel>>()
+    val discounts: LiveData<List<ProductModel>>
+        get() = _discounts
+
     init {
         viewModelScope.launch {
             productRepository.getAll().collect {
                 _products.postValue(it)
             }
         }
+        viewModelScope.launch {
+            productRepository.getDiscounts().collect {
+                _discounts.postValue(it)
+            }
+        }
     }
 
     fun addProductToCart(productId: Int, userId: String) {

app/src/main/java/com/example/shawarma/viewmodels/OrdersViewModel.kt

@@ -0,0 +1,57 @@
+package com.example.shawarma.viewmodels
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.shawarma.data.models.OrderStatus
+import com.example.shawarma.data.models.OrderWithProducts
+import com.example.shawarma.data.repos.OrderProductRepository
+import com.example.shawarma.data.repos.OrderRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class OrdersViewModel @Inject constructor(
+    private val orderRepository: OrderRepository,
+    private val orderProductRepository: OrderProductRepository
+) : ViewModel() {
+    private val _preparingOrders = MutableLiveData<List<OrderWithProducts>>()
+    private val _preparedOrders = MutableLiveData<List<OrderWithProducts>>()
+    private val _processedOrders = MutableLiveData<List<OrderWithProducts>>()
+
+    val preparingOrders: LiveData<List<OrderWithProducts>>
+        get() = _preparingOrders
+    val preparedOrders: LiveData<List<OrderWithProducts>>
+        get() = _preparedOrders
+    val processedOrders: LiveData<List<OrderWithProducts>>
+        get() = _processedOrders
+
+    init {
+        viewModelScope.launch {
+            orderRepository.getAll().collect { allOrders ->
+                _preparingOrders.postValue(allOrders.filter { it.order.status == OrderStatus.Готовится.name })
+                _preparedOrders.postValue(allOrders.filter { it.order.status == OrderStatus.Готово.name })
+                _processedOrders.postValue(allOrders.filter { it.order.status == OrderStatus.Выдано.name })
+            }
+        }
+    }
+
+    fun changeOrderStatus(order: OrderWithProducts, newStatus: String) {
+        val model = order.order
+        model.status = newStatus
+
+        viewModelScope.launch{
+            orderRepository.update(model)
+        }
+    }
+
+    fun deleteOrder(order: OrderWithProducts) {
+        viewModelScope.launch{
+            orderRepository.delete(order.order)
+        }
+    }
+
+
+}