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gitea/modules/indexer/internal/paginator.go

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Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package internal
import (
"math"
"code.gitea.io/gitea/models/db"
)
// ParsePaginator parses a db.Paginator into a skip and limit
func ParsePaginator(paginator db.Paginator, max ...int) (int, int) {
// Use a very large number to indicate no limit
unlimited := math.MaxInt32
if len(max) > 0 {
// Some indexer engines have a limit on the page size, respect that
unlimited = max[0]
}
if paginator == nil || paginator.IsListAll() {
return 0, unlimited
}
// Warning: Do not use GetSkipTake() for *db.ListOptions
// Its implementation could reset the page size with setting.API.MaxResponseItems
if listOptions, ok := paginator.(*db.ListOptions); ok {
if listOptions.Page >= 0 && listOptions.PageSize > 0 {
var start int
if listOptions.Page == 0 {
start = 0
} else {
start = (listOptions.Page - 1) * listOptions.PageSize
}
return start, listOptions.PageSize
}
return 0, unlimited
}
return paginator.GetSkipTake()
}