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pagination.go
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pagination.go
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// Copyright © 2022 Ory Corp
// SPDX-License-Identifier: Apache-2.0
package migrationpagination
import (
"fmt"
"net/http"
"net/url"
"github.com/ory/x/pagination"
"github.com/ory/x/pagination/pagepagination"
"github.com/ory/x/pagination/tokenpagination"
)
type Paginator struct {
p *pagepagination.PagePaginator
t *tokenpagination.TokenPaginator
}
func NewPaginator(p *pagepagination.PagePaginator, t *tokenpagination.TokenPaginator) *Paginator {
return &Paginator{p: p, t: t}
}
func NewDefaultPaginator() *Paginator {
return &Paginator{p: new(pagepagination.PagePaginator), t: new(tokenpagination.TokenPaginator)}
}
func (p *Paginator) ParsePagination(r *http.Request) (page, itemsPerPage int) {
if r.URL.Query().Has("page_token") || r.URL.Query().Has("page_size") {
return p.t.ParsePagination(r)
}
return p.p.ParsePagination(r)
}
func header(u *url.URL, rel string, itemsPerPage, offset int64) string {
q := u.Query()
q.Set("page_size", fmt.Sprintf("%d", itemsPerPage))
q.Set("page_token", tokenpagination.Encode(offset))
q.Set("per_page", fmt.Sprintf("%d", itemsPerPage))
q.Set("page", fmt.Sprintf("%d", offset/itemsPerPage))
u.RawQuery = q.Encode()
return fmt.Sprintf("<%s>; rel=\"%s\"", u.String(), rel)
}
func PaginationHeader(w http.ResponseWriter, u *url.URL, total int64, page, itemsPerPage int) {
pagination.HeaderWithFormatter(w, u, total, page, itemsPerPage, header)
}