120 lines
4.0 KiB
Go
120 lines
4.0 KiB
Go
/*
|
|
GoToSocial
|
|
Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
|
|
|
|
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 util
|
|
|
|
import (
|
|
"fmt"
|
|
"net/url"
|
|
|
|
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
|
|
"github.com/superseriousbusiness/gotosocial/internal/config"
|
|
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
|
|
)
|
|
|
|
// PageableResponseParams models the parameters to pass to PackagePageableResponse.
|
|
//
|
|
// 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 PageableResponseParams struct {
|
|
Items []interface{} // Sorted slice of items (statuses, notifications, etc)
|
|
Path string // path to use for next/prev queries in the link header
|
|
NextMaxIDKey string // key to use for the next max id query param in the link header, defaults to 'max_id'
|
|
NextMaxIDValue string // value to use for next max id
|
|
PrevMinIDKey string // key to use for the prev min id query param in the link header, defaults to 'min_id'
|
|
PrevMinIDValue string // value to use for prev min id
|
|
Limit int // limit number of entries to return
|
|
ExtraQueryParams []string // any extra query parameters to provide in the link header, should be in the format 'example=value'
|
|
}
|
|
|
|
// PackagePageableResponse 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 PackagePageableResponse(params PageableResponseParams) (*apimodel.PageableResponse, gtserror.WithCode) {
|
|
if params.NextMaxIDKey == "" {
|
|
params.NextMaxIDKey = "max_id"
|
|
}
|
|
|
|
if params.PrevMinIDKey == "" {
|
|
params.PrevMinIDKey = "min_id"
|
|
}
|
|
|
|
pageableResponse := EmptyPageableResponse()
|
|
|
|
if len(params.Items) == 0 {
|
|
return pageableResponse, nil
|
|
}
|
|
|
|
// items
|
|
pageableResponse.Items = params.Items
|
|
|
|
protocol := config.GetProtocol()
|
|
host := config.GetHost()
|
|
|
|
// next
|
|
nextRaw := params.NextMaxIDKey + "=" + params.NextMaxIDValue
|
|
if params.Limit != 0 {
|
|
nextRaw = fmt.Sprintf("limit=%d&", params.Limit) + nextRaw
|
|
}
|
|
for _, p := range params.ExtraQueryParams {
|
|
nextRaw = nextRaw + "&" + p
|
|
}
|
|
nextLink := &url.URL{
|
|
Scheme: protocol,
|
|
Host: host,
|
|
Path: params.Path,
|
|
RawQuery: nextRaw,
|
|
}
|
|
nextLinkString := nextLink.String()
|
|
pageableResponse.NextLink = nextLinkString
|
|
|
|
// prev
|
|
prevRaw := params.PrevMinIDKey + "=" + params.PrevMinIDValue
|
|
if params.Limit != 0 {
|
|
prevRaw = fmt.Sprintf("limit=%d&", params.Limit) + prevRaw
|
|
}
|
|
for _, p := range params.ExtraQueryParams {
|
|
prevRaw = prevRaw + "&" + p
|
|
}
|
|
prevLink := &url.URL{
|
|
Scheme: protocol,
|
|
Host: host,
|
|
Path: params.Path,
|
|
RawQuery: prevRaw,
|
|
}
|
|
prevLinkString := prevLink.String()
|
|
pageableResponse.PrevLink = prevLinkString
|
|
|
|
// link header
|
|
next := fmt.Sprintf("<%s>; rel=\"next\"", nextLinkString)
|
|
prev := fmt.Sprintf("<%s>; rel=\"prev\"", prevLinkString)
|
|
pageableResponse.LinkHeader = next + ", " + prev
|
|
|
|
return pageableResponse, nil
|
|
}
|
|
|
|
// EmptyPageableResponse just returns an empty
|
|
// PageableResponse with no link header or items.
|
|
func EmptyPageableResponse() *apimodel.PageableResponse {
|
|
return &apimodel.PageableResponse{
|
|
Items: []interface{}{},
|
|
}
|
|
}
|