mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-14 05:21:08 +00:00
87 lines
3 KiB
Go
87 lines
3 KiB
Go
// GoToSocial
|
|
// Copyright (C) GoToSocial Authors admin@gotosocial.org
|
|
// SPDX-License-Identifier: AGPL-3.0-or-later
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package paging
|
|
|
|
import (
|
|
"net/url"
|
|
"strings"
|
|
|
|
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
|
|
"github.com/superseriousbusiness/gotosocial/internal/config"
|
|
)
|
|
|
|
// ResponseParams models the parameters to pass to PageableResponse.
|
|
//
|
|
// The given items will be provided in the paged response.
|
|
//
|
|
// The other values are all used to create the Link header so that callers know
|
|
// which endpoint to query next and previously in order to do paging.
|
|
type ResponseParams struct {
|
|
Items []interface{} // Sorted slice of items (statuses, notifications, etc)
|
|
Path string // path to use for next/prev queries in the link header
|
|
Next *Page // page details for the next page
|
|
Prev *Page // page details for the previous page
|
|
Query url.Values // any extra query parameters to provide in the link header, should be in the format 'example=value'
|
|
}
|
|
|
|
// PackageResponse is a convenience function for returning
|
|
// a bunch of pageable items (notifications, statuses, etc), as well
|
|
// as a Link header to inform callers of where to find next/prev items.
|
|
func PackageResponse(params ResponseParams) *apimodel.PageableResponse {
|
|
var (
|
|
// Extract paging params.
|
|
nextPg = params.Next
|
|
prevPg = params.Prev
|
|
|
|
// Host app configuration.
|
|
proto = config.GetProtocol()
|
|
host = config.GetHost()
|
|
|
|
// Combined next/prev page link header parts.
|
|
linkHeaderParts = make([]string, 0, 2)
|
|
)
|
|
|
|
// Build the next / previous page links from page and host config.
|
|
nextLink := nextPg.ToLink(proto, host, params.Path, params.Query)
|
|
prevLink := prevPg.ToLink(proto, host, params.Path, params.Query)
|
|
|
|
if nextLink != "" {
|
|
// Append page "next" link to header parts.
|
|
linkHeaderParts = append(linkHeaderParts, `<`+nextLink+`>; rel="next"`)
|
|
}
|
|
|
|
if prevLink != "" {
|
|
// Append page "prev" link to header parts.
|
|
linkHeaderParts = append(linkHeaderParts, `<`+prevLink+`>; rel="prev"`)
|
|
}
|
|
|
|
return &apimodel.PageableResponse{
|
|
Items: params.Items,
|
|
NextLink: nextLink,
|
|
PrevLink: prevLink,
|
|
LinkHeader: strings.Join(linkHeaderParts, ", "),
|
|
}
|
|
}
|
|
|
|
// EmptyResponse just returns an empty
|
|
// PageableResponse with no link header or items.
|
|
func EmptyResponse() *apimodel.PageableResponse {
|
|
return &apimodel.PageableResponse{
|
|
Items: []interface{}{},
|
|
}
|
|
}
|