Created
September 12, 2023 09:46
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| import androidx.lifecycle.ViewModel | |
| import androidx.lifecycle.viewModelScope | |
| import com.techethic.sandbox.ae.model.FakeDataSource | |
| import com.techethic.sandbox.ae.model.Product | |
| import kotlinx.coroutines.delay | |
| import kotlinx.coroutines.flow.MutableStateFlow | |
| import kotlinx.coroutines.flow.StateFlow | |
| import kotlinx.coroutines.flow.asStateFlow | |
| import kotlinx.coroutines.launch | |
| class BrowseViewModel : ViewModel() { | |
| private val _products: MutableStateFlow<List<Product>> = MutableStateFlow(emptyList()) | |
| val products: StateFlow<List<Product>> = _products.asStateFlow() | |
| init { | |
| viewModelScope.launch { | |
| delay(1000) | |
| _products.value = FakeDataSource.ALL_PRODUCTS | |
| } | |
| } | |
| fun add(productId: String) { | |
| val newProductList = _products.value.map { product -> | |
| if (product.id == productId) { | |
| return@map product.copy(quantity = product.quantity + 1) | |
| } else { | |
| return@map product | |
| } | |
| } | |
| _products.value = newProductList | |
| } | |
| fun remove(productId: String) { | |
| val newProductList = _products.value.map { product -> | |
| if (product.id == productId) { | |
| return@map product.copy(quantity = product.quantity - 1) | |
| } else { | |
| return@map product | |
| } | |
| } | |
| _products.value = newProductList | |
| } | |
| } |
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