first-commit

modules/util/paginate.go

@@ -0,0 +1,33 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package util
+
+import "reflect"
+
+// PaginateSlice cut a slice as per pagination options
+// if page = 0 it do not paginate
+func PaginateSlice(list any, page, pageSize int) any {
+	if page <= 0 || pageSize <= 0 {
+		return list
+	}
+	if reflect.TypeOf(list).Kind() != reflect.Slice {
+		return list
+	}
+
+	listValue := reflect.ValueOf(list)
+
+	page--
+
+	if page*pageSize >= listValue.Len() {
+		return listValue.Slice(listValue.Len(), listValue.Len()).Interface()
+	}
+
+	listValue = listValue.Slice(page*pageSize, listValue.Len())
+
+	if listValue.Len() > pageSize {
+		return listValue.Slice(0, pageSize).Interface()
+	}
+
+	return listValue.Interface()
+}