ViewModel.kt

package dev.inmo.navigation.mvvm

import dev.inmo.micro_utils.coroutines.subscribeSafelyWithoutExceptions
import dev.inmo.navigation.core.NavigationNode
import dev.inmo.navigation.core.configs.NavigationNodeDefaultConfig
import dev.inmo.navigation.core.onDestroyFlow
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.SupervisorJob
import kotlinx.coroutines.cancel

/**
 * This is an abstract class of ViewModel for MVVM pattern.
 *
 * It has its own scope bind to [NavigationNode] lifecycle: when [NavigationNode] will be destroyed, its
 * [scope] will be cancelled
 */
abstract class ViewModel<T>(
    node: NavigationNode<out T, T>
) {
    val scope: CoroutineScope = CoroutineScope(Dispatchers.Default + SupervisorJob())

    init {
        node.onDestroyFlow.subscribeSafelyWithoutExceptions(scope) {
            scope.cancel()
        }
    }
}