add optionallyReverse extensions

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## 0.9.4
 
+* `Pagination`:
+    * `Common`:
+        * Add several `optionallyReverse` functions
+
 ## 0.9.3
 
 * `Versions`:

pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/utils/IterableExtensions.kt

@@ -38,3 +38,17 @@ fun <T> Set<T>.paginate(with: Pagination): PaginationResult<T> {
         size.toLong()
     )
 }
+
+fun <T> Iterable<T>.optionallyReverse(reverse: Boolean) = if (reverse) {
+    reversed()
+} else {
+    this
+}
+
+inline fun <reified T> Array<T>.optionallyReverse(reverse: Boolean) = if (reverse) {
+    Array(size) {
+        get(lastIndex - it)
+    }
+} else {
+    this
+}

pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/utils/PaginationReversing.kt

@@ -26,3 +26,15 @@ fun Pagination.reverse(datasetSize: Long): SimplePagination {
  * Shortcut for [reverse]
  */
 fun Pagination.reverse(objectsCount: Int) = reverse(objectsCount.toLong())
+
+fun Pagination.optionallyReverse(objectsCount: Int, reverse: Boolean) = if (reverse) {
+    reverse(objectsCount)
+} else {
+    this
+}
+
+fun Pagination.optionallyReverse(objectsCount: Long, reverse: Boolean) = if (reverse) {
+    reverse(objectsCount)
+} else {
+    this
+}