Удаление продукта

app/src/main/java/com/example/shawarma/screens/products/ProductsScreen.kt

@@ -13,7 +13,6 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.magnifier
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.Button
 import androidx.compose.material.ButtonDefaults
@@ -21,25 +20,20 @@ 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 androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavHostController
 import com.example.shawarma.R
-import com.example.shawarma.data.db.AppDatabase
 import com.example.shawarma.data.models.ProductModel
-import com.example.shawarma.screens.home.HomeList
-import com.example.shawarma.screens.home.ProductCard
 import com.example.shawarma.ui.theme.MarckFamily
 import com.example.shawarma.ui.theme.MyLightRed
 import com.example.shawarma.ui.theme.MyLightYellow
@@ -47,9 +41,8 @@ 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.utils.ScreenPaths
+import com.example.shawarma.viewmodels.ProductsViewModel
 import com.example.shawarma.widgets.ShawarmaLogo2
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 
 @Composable
 fun ProductsScreen(navHostController: NavHostController) {
@@ -65,16 +58,9 @@ fun ProductsScreen(navHostController: NavHostController) {
 
 @Composable
 fun ProductsList(navHostController: NavHostController){
-    val context = LocalContext.current
-    val products = remember { mutableStateListOf<ProductModel>() }
-    LaunchedEffect(Unit) {
-        withContext(Dispatchers.IO) {
-            AppDatabase.getInstance(context).productDao().getItems().collect { data ->
-                products.clear()
-                products.addAll(data)
-            }
-        }
-    }
+    val productsViewModel: ProductsViewModel = hiltViewModel<ProductsViewModel>()
+
+    val products = productsViewModel.products.observeAsState().value
 
     Box(
         modifier = Modifier
@@ -117,6 +103,7 @@ fun ProductsList(navHostController: NavHostController){
             modifier = Modifier.padding(top = 160.dp)
         )
         {
+            if (products != null) {
                 items(products.size) { index ->
                     ProductItem(products[index], navHostController)
                     Spacer(modifier = Modifier.height(20.dp))
@@ -125,12 +112,15 @@ fun ProductsList(navHostController: NavHostController){
                     }
                 }
             }
+        }
 
     }
 }
 
 @Composable
 fun ProductItem(product: ProductModel, navHostController: NavHostController){
+    val productsViewModel: ProductsViewModel = hiltViewModel<ProductsViewModel>()
+
     Card(
         border = BorderStroke(width = 2.dp, color = MyOrange),
         shape = RoundedCornerShape(size = 20.dp),
@@ -196,7 +186,9 @@ fun ProductItem(product: ProductModel, navHostController: NavHostController){
                 colors = ButtonDefaults.buttonColors(
                     backgroundColor = MyLightRed
                 ),
-                onClick = { /*TODO*/ }
+                onClick = {
+                    productsViewModel.deleteProduct(product)
+                }
             ) {
                 Icon(
                     painter = painterResource(id = R.drawable.trash),

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

@@ -0,0 +1,36 @@
+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.ProductModel
+import com.example.shawarma.data.repos.ProductRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class ProductsViewModel  @Inject constructor(
+    private val productRepository: ProductRepository
+) : ViewModel() {
+    private val _products =  MutableLiveData<List<ProductModel>>()
+    val products: LiveData<List<ProductModel>>
+        get() = _products
+
+    init {
+        viewModelScope.launch {
+            productRepository.getItems().collect {
+                _products.postValue(it)
+            }
+        }
+    }
+
+    fun deleteProduct(product: ProductModel) {
+        viewModelScope.launch {
+            productRepository.delete(product)
+        }
+    }
+
+
+}