GoToSocial/internal/processing/federation/getstatusreplies.go

162 lines
5.6 KiB
Go

/*
GoToSocial
Copyright (C) 2021-2022 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 federation
import (
"context"
"fmt"
"net/url"
"github.com/superseriousbusiness/activity/streams"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
)
func (p *processor) GetStatusReplies(ctx context.Context, requestedUsername string, requestedStatusID string, page bool, onlyOtherAccounts bool, minID string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
// get the account the request is referring to
requestedAccount, err := p.db.GetLocalAccountByUsername(ctx, requestedUsername)
if err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
}
// authenticate the request
requestingAccountURI, errWithCode := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
if errWithCode != nil {
return nil, errWithCode
}
requestingAccount, err := p.federator.GetRemoteAccount(ctx, requestedUsername, requestingAccountURI, false, false)
if err != nil {
return nil, gtserror.NewErrorNotAuthorized(err)
}
// authorize the request:
// 1. check if a block exists between the requester and the requestee
blocked, err := p.db.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID, true)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if blocked {
return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
}
// get the status out of the database here
s := &gtsmodel.Status{}
if err := p.db.GetWhere(ctx, []db.Where{
{Key: "id", Value: requestedStatusID},
{Key: "account_id", Value: requestedAccount.ID},
}, s); err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting status with id %s and account id %s: %s", requestedStatusID, requestedAccount.ID, err))
}
visible, err := p.filter.StatusVisible(ctx, s, requestingAccount)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if !visible {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("status with id %s not visible to user with id %s", s.ID, requestingAccount.ID))
}
var data map[string]interface{}
// now there are three scenarios:
// 1. we're asked for the whole collection and not a page -- we can just return the collection, with no items, but a link to 'first' page.
// 2. we're asked for a page but only_other_accounts has not been set in the query -- so we should just return the first page of the collection, with no items.
// 3. we're asked for a page, and only_other_accounts has been set, and min_id has optionally been set -- so we need to return some actual items!
switch {
case !page:
// scenario 1
// get the collection
collection, err := p.tc.StatusToASRepliesCollection(ctx, s, onlyOtherAccounts)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
data, err = streams.Serialize(collection)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
case page && requestURL.Query().Get("only_other_accounts") == "":
// scenario 2
// get the collection
collection, err := p.tc.StatusToASRepliesCollection(ctx, s, onlyOtherAccounts)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
// but only return the first page
data, err = streams.Serialize(collection.GetActivityStreamsFirst().GetActivityStreamsCollectionPage())
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
default:
// scenario 3
// get immediate children
replies, err := p.db.GetStatusChildren(ctx, s, true, minID)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
// filter children and extract URIs
replyURIs := map[string]*url.URL{}
for _, r := range replies {
// only show public or unlocked statuses as replies
if r.Visibility != gtsmodel.VisibilityPublic && r.Visibility != gtsmodel.VisibilityUnlocked {
continue
}
// respect onlyOtherAccounts parameter
if onlyOtherAccounts && r.AccountID == requestedAccount.ID {
continue
}
// only show replies that the status owner can see
visibleToStatusOwner, err := p.filter.StatusVisible(ctx, r, requestedAccount)
if err != nil || !visibleToStatusOwner {
continue
}
// only show replies that the requester can see
visibleToRequester, err := p.filter.StatusVisible(ctx, r, requestingAccount)
if err != nil || !visibleToRequester {
continue
}
rURI, err := url.Parse(r.URI)
if err != nil {
continue
}
replyURIs[r.ID] = rURI
}
repliesPage, err := p.tc.StatusURIsToASRepliesPage(ctx, s, onlyOtherAccounts, minID, replyURIs)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
data, err = streams.Serialize(repliesPage)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
}
return data, nil
}