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add tests for paged loading components

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InsanusMokrassar
2025-03-02 23:06:42 +06:00
parent 3b7dde3cb1
commit e70d34d91a
4 changed files with 169 additions and 28 deletions
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44
pagination/compose/src/commonMain/kotlin/InfinityPagedComponent.kt
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@@ -19,11 +19,14 @@ class InfinityPagedComponentContext<T> internal constructor(
) {
internal val iterationState: MutableState<Pair<Int, Pagination>> = mutableStateOf(0 to SimplePagination(page, size))
internal val dataState: MutableState<List<T>?> = mutableStateOf(null)
internal var lastPageLoaded = false
/**
* Loads the next page of data. If the current page is the last one, the function returns early.
*/
fun loadNext() {
if (lastPageLoaded) return
iterationState.value = iterationState.value.let {
if ((dataState.value as? PaginationResult<*>) ?.isLastPage == true) return
(it.first + 1) to it.second.nextPage()
@@ -35,6 +38,7 @@ class InfinityPagedComponentContext<T> internal constructor(
*/
fun reload() {
dataState.value = null
lastPageLoaded = false
iterationState.value = iterationState.value.let {
(it.first + 1) to (it.second.firstPage())
}
@@ -59,8 +63,12 @@ internal fun <T> InfinityPagedComponent(
) {
val context = remember { InfinityPagedComponentContext<T>(page, size) }
LaunchedEffect(context.iterationState.value) {
context.dataState.value = (context.dataState.value ?: emptyList()) + loader(context, context.iterationState.value.second).results
LaunchedEffect(context.iterationState.value.first) {
val paginationResult = loader(context, context.iterationState.value.second)
if (paginationResult.isLastPage) {
context.lastPageLoaded = true
}
context.dataState.value = (context.dataState.value ?: emptyList()) + paginationResult.results
}
context.dataState.value ?.let {
@@ -79,11 +87,10 @@ internal fun <T> InfinityPagedComponent(
@Composable
fun <T> InfinityPagedComponent(
pageInfo: Pagination,
loader: suspend PagedComponentContext<T>.(Pagination) -> PaginationResult<T>,
block: @Composable PagedComponentContext<T>.(PaginationResult<T>) -> Unit
loader: suspend InfinityPagedComponentContext<T>.(Pagination) -> PaginationResult<T>,
block: @Composable InfinityPagedComponentContext<T>.(List<T>?) -> Unit
) {
PagedComponent(
null,
InfinityPagedComponent(
pageInfo.page,
pageInfo.size,
loader,
@@ -91,25 +98,6 @@ fun <T> InfinityPagedComponent(
)
}
/**
* Overloaded composable function for an infinitely paged component.
*
* @param T The type of the paginated data.
* @param initialPage Initial page number.
* @param size Number of items per page.
* @param loader Suspended function that loads paginated data.
* @param block Composable function that renders the UI with the loaded data.
*/
@Composable
fun <T> InfinityPagedComponent(
initialPage: Int,
size: Int,
loader: suspend PagedComponentContext<T>.(Pagination) -> PaginationResult<T>,
block: @Composable PagedComponentContext<T>.(PaginationResult<T>) -> Unit
) {
PagedComponent(null, initialPage, size, loader, block)
}
/**
* Overloaded composable function for an infinitely paged component.
*
@@ -121,8 +109,8 @@ fun <T> InfinityPagedComponent(
@Composable
fun <T> InfinityPagedComponent(
size: Int,
loader: suspend PagedComponentContext<T>.(Pagination) -> PaginationResult<T>,
block: @Composable PagedComponentContext<T>.(PaginationResult<T>) -> Unit
loader: suspend InfinityPagedComponentContext<T>.(Pagination) -> PaginationResult<T>,
block: @Composable InfinityPagedComponentContext<T>.(List<T>?) -> Unit
) {
PagedComponent(0, size, loader, block)
InfinityPagedComponent(0, size, loader, block)
}