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// 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 list
import (
"context"
"errors"
"fmt"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/id"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// AddToList adds targetAccountIDs to the given list, if valid.
func (p *Processor) AddToList(ctx context.Context, account *gtsmodel.Account, listID string, targetAccountIDs []string) gtserror.WithCode {
// Ensure this list exists + account owns it.
_, errWithCode := p.getList(ctx, account.ID, listID)
if errWithCode != nil {
return errWithCode
}
// Get all follows that are entries in list.
follows, err := p.state.DB.GetFollowsInList(
// We only need barebones model.
gtscontext.SetBarebones(ctx),
listID,
nil,
)
if err != nil {
err := gtserror.Newf("error getting list follows: %w", err)
return gtserror.NewErrorInternalError(err)
}
// Convert the follows to a hash set containing the target account IDs.
inFollows := util.ToSetFunc(follows, func(follow *gtsmodel.Follow) string {
return follow.TargetAccountID
})
// Preallocate a slice of expected list entries, we specifically
// gather and add all the target accounts in one go rather than
// individually, to ensure we don't end up with partial updates.
entries := make([]*gtsmodel.ListEntry, 0, len(targetAccountIDs))
// Iterate all the account IDs in given target list.
for _, targetAccountID := range targetAccountIDs {
// Look for follow to target account.
if inFollows.Has(targetAccountID) {
text := fmt.Sprintf("account %s is already in list %s", targetAccountID, listID)
return gtserror.NewErrorUnprocessableEntity(errors.New(text), text)
}
// Get the actual follow to target.
follow, err := p.state.DB.GetFollow(
// We don't need any sub-models.
gtscontext.SetBarebones(ctx),
account.ID,
targetAccountID,
)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err := gtserror.Newf("db error getting follow: %w", err)
return gtserror.NewErrorInternalError(err)
}
if follow == nil {
text := fmt.Sprintf("account %s not currently followed", targetAccountID)
return gtserror.NewErrorNotFound(errors.New(text), text)
}
// Generate new entry for this follow in list.
entries = append(entries, >smodel.ListEntry{
ID: id.NewULID(),
ListID: listID,
FollowID: follow.ID,
})
}
// Add all of the gathered list entries to the database.
switch err := p.state.DB.PutListEntries(ctx, entries); {
case err == nil:
case errors.Is(err, db.ErrAlreadyExists):
err := gtserror.Newf("conflict adding list entry: %w", err)
return gtserror.NewErrorUnprocessableEntity(err)
default:
err := gtserror.Newf("db error inserting list entries: %w", err)
return gtserror.NewErrorInternalError(err)
}
return nil
}
// RemoveFromList removes targetAccountIDs from the given list, if valid.
func (p *Processor) RemoveFromList(
ctx context.Context,
account *gtsmodel.Account,
listID string,
targetAccountIDs []string,
) gtserror.WithCode {
// Ensure this list exists + account owns it.
_, errWithCode := p.getList(ctx, account.ID, listID)
if errWithCode != nil {
return errWithCode
}
// Get all follows that are entries in list.
follows, err := p.state.DB.GetFollowsInList(
// We only need barebones model.
gtscontext.SetBarebones(ctx),
listID,
nil,
)
if err != nil {
err := gtserror.Newf("error getting list follows: %w", err)
return gtserror.NewErrorInternalError(err)
}
// Convert the follows to a map keyed by the target account ID.
followsMap := util.KeyBy(follows, func(follow *gtsmodel.Follow) string {
return follow.TargetAccountID
})
var errs gtserror.MultiError
// Iterate all the account IDs in given target list.
for _, targetAccountID := range targetAccountIDs {
// Look for follow targetting this account.
follow, ok := followsMap[targetAccountID]
if !ok {
// not in list.
continue
}
// Delete the list entry containing follow ID in list.
err := p.state.DB.DeleteListEntry(ctx, listID, follow.ID)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
errs.Appendf("error removing list entry: %w", err)
continue
}
}
// Wrap errors in errWithCode if set.
if err := errs.Combine(); err != nil {
return gtserror.NewErrorInternalError(err)
}
return nil
}
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