Updated on 2026-08-14

core/decompose/src/main/kotlin/com/tangem/core/decompose/utils/ActivityInstanceHolder.kt

@@ -0,0 +1,43 @@
+package com.tangem.core.decompose.utils
+
+import androidx.appcompat.app.AppCompatActivity
+import com.arkivanov.essenty.instancekeeper.getOrCreateSimple
+import com.arkivanov.essenty.lifecycle.subscribe
+import com.tangem.core.decompose.context.AppComponentContext
+import java.lang.ref.WeakReference
+
+class ActivityInstanceHolder<T : Any> {
+    private var instance: T? = null
+
+    lateinit var instanceAccess: WeakReference<T>
+        private set
+
+    fun set(instance: T) {
+        this.instance = instance
+        instanceAccess = WeakReference(instance)
+    }
+
+    fun clear() {
+        instance = null
+        instanceAccess.clear()
+    }
+}
+
+inline fun <reified T : Any> AppComponentContext.getOrCreateActivityInstanceHolder(
+    noinline factory: (AppCompatActivity) -> T,
+): ActivityInstanceHolder<T> {
+    val holder = instanceKeeper.getOrCreateSimple {
+        ActivityInstanceHolder<T>()
+    }
+
+    lifecycle.subscribe(
+        onCreate = {
+            holder.set(factory(activity))
+        },
+        onDestroy = {
+            holder.clear()
+        },
+    )
+
+    return holder
+}