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gotosocial/internal/api/activitypub/users/followers.go

79 lines
2.5 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 users
import (
"encoding/json"
"errors"
"net/http"
"strings"
"github.com/gin-gonic/gin"
apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/paging"
)
// FollowersGETHandler returns a collection of URIs for followers of the target user, formatted so that other AP servers can understand it.
func (m *Module) FollowersGETHandler(c *gin.Context) {
// usernames on our instance are always lowercase
requestedUsername := strings.ToLower(c.Param(UsernameKey))
if requestedUsername == "" {
err := errors.New("no username specified in request")
apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGetV1)
return
}
format, err := apiutil.NegotiateAccept(c, apiutil.ActivityPubOrHTMLHeaders...)
if err != nil {
apiutil.ErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), m.processor.InstanceGetV1)
return
}
if format == string(apiutil.TextHTML) {
// This isn't an ActivityPub request;
// redirect to the user's profile.
c.Redirect(http.StatusSeeOther, "/@"+requestedUsername)
return
}
page, errWithCode := paging.ParseIDPage(c,
1, // min limit
80, // max limit
0, // default = disabled
)
if errWithCode != nil {
apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
return
}
resp, errWithCode := m.processor.Fedi().FollowersGet(c.Request.Context(), requestedUsername, page)
if errWithCode != nil {
apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
return
}
b, err := json.Marshal(resp)
if err != nil {
apiutil.ErrorHandler(c, gtserror.NewErrorInternalError(err), m.processor.InstanceGetV1)
return
}
c.Data(http.StatusOK, format, b)
}