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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 account
import (
"context"
"errors"
"fmt"
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/log"
)
// FollowersGet fetches a list of the target account's followers.
func (p *Processor) FollowersGet(ctx context.Context, requestingAccount *gtsmodel.Account, targetAccountID string) ([]apimodel.Account, gtserror.WithCode) {
if blocked, err := p.state.DB.IsEitherBlocked(ctx, requestingAccount.ID, targetAccountID); err != nil {
err = fmt.Errorf("FollowersGet: db error checking block: %w", err)
return nil, gtserror.NewErrorInternalError(err)
} else if blocked {
err = errors.New("FollowersGet: block exists between accounts")
return nil, gtserror.NewErrorNotFound(err)
}
follows, err := p.state.DB.GetAccountFollowers(ctx, targetAccountID)
if err != nil {
if !errors.Is(err, db.ErrNoEntries) {
err = fmt.Errorf("FollowersGet: db error getting followers: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
return []apimodel.Account{}, nil
}
return p.accountsFromFollows(ctx, follows, requestingAccount.ID)
}
// FollowingGet fetches a list of the accounts that target account is following.
func (p *Processor) FollowingGet(ctx context.Context, requestingAccount *gtsmodel.Account, targetAccountID string) ([]apimodel.Account, gtserror.WithCode) {
if blocked, err := p.state.DB.IsEitherBlocked(ctx, requestingAccount.ID, targetAccountID); err != nil {
err = fmt.Errorf("FollowingGet: db error checking block: %w", err)
return nil, gtserror.NewErrorInternalError(err)
} else if blocked {
err = errors.New("FollowingGet: block exists between accounts")
return nil, gtserror.NewErrorNotFound(err)
}
follows, err := p.state.DB.GetAccountFollows(ctx, targetAccountID)
if err != nil {
if !errors.Is(err, db.ErrNoEntries) {
err = fmt.Errorf("FollowingGet: db error getting followers: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
return []apimodel.Account{}, nil
}
return p.targetAccountsFromFollows(ctx, follows, requestingAccount.ID)
}
// RelationshipGet returns a relationship model describing the relationship of the targetAccount to the Authed account.
func (p *Processor) RelationshipGet(ctx context.Context, requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode) {
if requestingAccount == nil {
return nil, gtserror.NewErrorForbidden(errors.New("not authed"))
}
gtsR, err := p.state.DB.GetRelationship(ctx, requestingAccount.ID, targetAccountID)
if err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("error getting relationship: %s", err))
}
r, err := p.tc.RelationshipToAPIRelationship(ctx, gtsR)
if err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting relationship: %s", err))
}
return r, nil
}
func (p *Processor) accountsFromFollows(ctx context.Context, follows []*gtsmodel.Follow, requestingAccountID string) ([]apimodel.Account, gtserror.WithCode) {
accounts := make([]apimodel.Account, 0, len(follows))
for _, follow := range follows {
if follow.Account == nil {
// No account set for some reason; just skip.
log.WithContext(ctx).WithField("follow", follow).Warn("follow had no associated account")
continue
}
if blocked, err := p.state.DB.IsEitherBlocked(ctx, requestingAccountID, follow.AccountID); err != nil {
err = fmt.Errorf("accountsFromFollows: db error checking block: %w", err)
return nil, gtserror.NewErrorInternalError(err)
} else if blocked {
continue
}
account, err := p.tc.AccountToAPIAccountPublic(ctx, follow.Account)
if err != nil {
err = fmt.Errorf("accountsFromFollows: error converting account to api account: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
accounts = append(accounts, *account)
}
return accounts, nil
}
func (p *Processor) targetAccountsFromFollows(ctx context.Context, follows []*gtsmodel.Follow, requestingAccountID string) ([]apimodel.Account, gtserror.WithCode) {
accounts := make([]apimodel.Account, 0, len(follows))
for _, follow := range follows {
if follow.TargetAccount == nil {
// No account set for some reason; just skip.
log.WithContext(ctx).WithField("follow", follow).Warn("follow had no associated target account")
continue
}
if blocked, err := p.state.DB.IsEitherBlocked(ctx, requestingAccountID, follow.TargetAccountID); err != nil {
err = fmt.Errorf("targetAccountsFromFollows: db error checking block: %w", err)
return nil, gtserror.NewErrorInternalError(err)
} else if blocked {
continue
}
account, err := p.tc.AccountToAPIAccountPublic(ctx, follow.TargetAccount)
if err != nil {
err = fmt.Errorf("targetAccountsFromFollows: error converting account to api account: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
accounts = append(accounts, *account)
}
return accounts, nil
}
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