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/*
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 account
import (
"context"
"fmt"
"github.com/superseriousbusiness/gotosocial/internal/ap"
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
"github.com/superseriousbusiness/gotosocial/internal/messages"
"github.com/superseriousbusiness/gotosocial/internal/uris"
)
func (p *processor) FollowCreate(ctx context.Context, requestingAccount *gtsmodel.Account, form *apimodel.AccountFollowRequest) (*apimodel.Relationship, gtserror.WithCode) {
// if there's a block between the accounts we shouldn't create the request ofc
if blocked, err := p.db.IsBlocked(ctx, requestingAccount.ID, form.ID, true); err != nil {
return nil, gtserror.NewErrorInternalError(err)
} else if blocked {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("block exists between accounts"))
}
// make sure the target account actually exists in our db
targetAcct, err := p.db.GetAccountByID(ctx, form.ID)
if err != nil {
if err == db.ErrNoEntries {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("accountfollowcreate: account %s not found in the db: %s", form.ID, err))
}
return nil, gtserror.NewErrorInternalError(err)
}
// check if a follow exists already
if follows, err := p.db.IsFollowing(ctx, requestingAccount, targetAcct); err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow in db: %s", err))
} else if follows {
// already follows so just return the relationship
return p.RelationshipGet(ctx, requestingAccount, form.ID)
}
// check if a follow request exists already
if followRequested, err := p.db.IsFollowRequested(ctx, requestingAccount, targetAcct); err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow request in db: %s", err))
} else if followRequested {
// already follow requested so just return the relationship
return p.RelationshipGet(ctx, requestingAccount, form.ID)
}
// check for attempt to follow self
if requestingAccount.ID == targetAcct.ID {
return nil, gtserror.NewErrorNotAcceptable(fmt.Errorf("accountfollowcreate: account %s cannot follow itself", requestingAccount.ID))
}
// make the follow request
newFollowID, err := id.NewRandomULID()
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
showReblogs := true
notify := false
fr := >smodel.FollowRequest{
ID: newFollowID,
AccountID: requestingAccount.ID,
TargetAccountID: form.ID,
ShowReblogs: &showReblogs,
URI: uris.GenerateURIForFollow(requestingAccount.Username, newFollowID),
Notify: ¬ify,
}
if form.Reblogs != nil {
fr.ShowReblogs = form.Reblogs
}
if form.Notify != nil {
fr.Notify = form.Notify
}
// whack it in the database
if err := p.db.Put(ctx, fr); err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error creating follow request in db: %s", err))
}
// if it's a local account that's not locked we can just straight up accept the follow request
if !*targetAcct.Locked && targetAcct.Domain == "" {
if _, err := p.db.AcceptFollowRequest(ctx, requestingAccount.ID, form.ID); err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error accepting folow request for local unlocked account: %s", err))
}
// return the new relationship
return p.RelationshipGet(ctx, requestingAccount, form.ID)
}
// otherwise we leave the follow request as it is and we handle the rest of the process asynchronously
p.clientWorker.Queue(messages.FromClientAPI{
APObjectType: ap.ActivityFollow,
APActivityType: ap.ActivityCreate,
GTSModel: fr,
OriginAccount: requestingAccount,
TargetAccount: targetAcct,
})
// return whatever relationship results from this
return p.RelationshipGet(ctx, requestingAccount, form.ID)
}
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