start add paged/loading component

common/compose/src/commonMain/kotlin/dev/inmo/micro_utils/common/compose/LoadableComponent.kt

@@ -0,0 +1,74 @@
+package dev.inmo.micro_utils.common.compose
+
+import androidx.compose.runtime.*
+import dev.inmo.micro_utils.common.Optional
+import dev.inmo.micro_utils.common.dataOrThrow
+import dev.inmo.micro_utils.common.optional
+
+class LoadableComponentContext<T> internal constructor(
+    presetOptional: Optional<T>,
+) {
+    internal val iterationState: MutableState<Int> = mutableStateOf(0)
+
+    internal var dataOptional: Optional<T> = if (presetOptional.dataPresented) presetOptional else Optional.absent()
+        private set
+    internal val dataState: MutableState<Optional<T>> = mutableStateOf(dataOptional)
+
+    fun reload() {
+        iterationState.value++
+    }
+}
+
+/**
+ * Showing data with ability to reload data
+ *
+ * [block] will be shown when [loader] will complete loading. If you want to reload data, just call
+ * [LoadableComponentContext.reload]
+ */
+@Composable
+fun <T> LoadableComponent(
+    preload: Optional<T>,
+    loader: suspend LoadableComponentContext<T>.() -> T,
+    block: @Composable LoadableComponentContext<T>.(T) -> Unit
+) {
+    val context = remember { LoadableComponentContext(preload) }
+
+    LaunchedEffect(context.iterationState.value) {
+        context.dataState.value = loader(context).optional
+    }
+
+    context.dataState.let {
+        if (it.value.dataPresented) {
+            context.block(it.value.dataOrThrow(IllegalStateException("Data must be presented, but optional has been changed by some way")))
+        }
+    }
+}
+
+/**
+ * Showing data with ability to reload data
+ *
+ * [block] will be shown when [loader] will complete loading. If you want to reload data, just call
+ * [LoadableComponentContext.reload]
+ */
+@Composable
+fun <T> LoadableComponent(
+    preload: T,
+    loader: suspend LoadableComponentContext<T>.() -> T,
+    block: @Composable LoadableComponentContext<T>.(T) -> Unit
+) {
+    LoadableComponent(preload.optional, loader, block)
+}
+
+/**
+ * Showing data with ability to reload data
+ *
+ * [block] will be shown when [loader] will complete loading. If you want to reload data, just call
+ * [LoadableComponentContext.reload]
+ */
+@Composable
+fun <T> LoadableComponent(
+    loader: suspend LoadableComponentContext<T>.() -> T,
+    block: @Composable LoadableComponentContext<T>.(T) -> Unit
+) {
+    LoadableComponent(Optional.absent(), loader, block)
+}