code.gitea.io/gitea@v1.19.3/modules/util/paginate.go (about)

     1  // Copyright 2021 The Gitea Authors. All rights reserved.
     2  // SPDX-License-Identifier: MIT
     3  
     4  package util
     5  
     6  import "reflect"
     7  
     8  // PaginateSlice cut a slice as per pagination options
     9  // if page = 0 it do not paginate
    10  func PaginateSlice(list interface{}, page, pageSize int) interface{} {
    11  	if page <= 0 || pageSize <= 0 {
    12  		return list
    13  	}
    14  	if reflect.TypeOf(list).Kind() != reflect.Slice {
    15  		return list
    16  	}
    17  
    18  	listValue := reflect.ValueOf(list)
    19  
    20  	page--
    21  
    22  	if page*pageSize >= listValue.Len() {
    23  		return listValue.Slice(listValue.Len(), listValue.Len()).Interface()
    24  	}
    25  
    26  	listValue = listValue.Slice(page*pageSize, listValue.Len())
    27  
    28  	if listValue.Len() > pageSize {
    29  		return listValue.Slice(0, pageSize).Interface()
    30  	}
    31  
    32  	return listValue.Interface()
    33  }