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Refactor(ToolStorePagingSource): Optimize page key

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This commit is contained in:
Fat Snake
2024-08-18 14:45:07 +08:00
parent 0e592c1600
commit 21264d8ff7
1 changed files with 7 additions and 4 deletions
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11
app/src/main/kotlin/top/fatweb/oxygen/toolbox/network/paging/ToolStorePagingSource.kt
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@@ -14,7 +14,11 @@ internal class ToolStorePagingSource(
private val toolDao: ToolDao, private val toolDao: ToolDao,
private val searchValue: String private val searchValue: String
) : PagingSource<Int, ToolEntity>() { ) : PagingSource<Int, ToolEntity>() {
override fun getRefreshKey(state: PagingState<Int, ToolEntity>): Int? = null override fun getRefreshKey(state: PagingState<Int, ToolEntity>): Int? =
state.anchorPosition?.let {
val anchorPage = state.closestPageToPosition(it)
anchorPage?.prevKey?.plus(1) ?: anchorPage?.nextKey?.minus(1)
}
override suspend fun load(params: LoadParams<Int>): LoadResult<Int, ToolEntity> { override suspend fun load(params: LoadParams<Int>): LoadResult<Int, ToolEntity> {
return try { return try {
@@ -26,7 +30,6 @@ internal class ToolStorePagingSource(
} }
val (_, pages, _, _, records) = data!! val (_, pages, _, _, records) = data!!
val nextPage = if (currentPage < pages) currentPage + 1 else null
LoadResult.Page( LoadResult.Page(
data = records.map(ToolVo::asExternalModel).map { toolEntity -> data = records.map(ToolVo::asExternalModel).map { toolEntity ->
toolDao.selectToolByUsernameAndToolId( toolDao.selectToolByUsernameAndToolId(
@@ -42,8 +45,8 @@ internal class ToolStorePagingSource(
} }
} ?: toolEntity } ?: toolEntity
}, },
prevKey = null, prevKey = if (currentPage == 0) null else currentPage - 1,
nextKey = nextPage nextKey = if (currentPage < pages) currentPage + 1 else null
) )
} catch (e: Throwable) { } catch (e: Throwable) {
LoadResult.Error(e) LoadResult.Error(e)