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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 common
import (
"context"
"errors"
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/federation/dereferencing"
statusfilter "github.com/superseriousbusiness/gotosocial/internal/filter/status"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
)
// GetTargetStatusBy fetches the target status with db load
// function, given the authorized (or, nil) requester's
// account. This returns an approprate gtserror.WithCode
// accounting for not found and visibility to requester.
//
// window can be used to force refresh of the target if it's
// deemed to be stale. Falls back to default window if nil.
func (p *Processor) GetTargetStatusBy(
ctx context.Context,
requester *gtsmodel.Account,
getTargetFromDB func() (*gtsmodel.Status, error),
window *dereferencing.FreshnessWindow,
) (
status *gtsmodel.Status,
visible bool,
errWithCode gtserror.WithCode,
) {
// Fetch the target status from db.
target, err := getTargetFromDB()
if err != nil && !errors.Is(err, db.ErrNoEntries) {
return nil, false, gtserror.NewErrorInternalError(err)
}
if target == nil {
// DB loader could not find status in database.
const text = "target status not found"
return nil, false, gtserror.NewErrorNotFound(
errors.New(text),
text,
)
}
// Check whether target status is visible to requesting account.
visible, err = p.visFilter.StatusVisible(ctx, requester, target)
if err != nil {
return nil, false, gtserror.NewErrorInternalError(err)
}
if requester != nil && visible {
// Only refresh status if visible to requester,
// and there is *authorized* requester to prevent
// a possible DOS vector for unauthorized clients.
latest, _, err := p.federator.RefreshStatus(ctx,
requester.Username,
target,
nil,
window,
)
if err != nil {
log.Errorf(ctx, "error refreshing target %s: %v", target.URI, err)
return target, visible, nil
}
// Set latest.
target = latest
}
return target, visible, nil
}
// GetVisibleTargetStatus calls GetTargetStatusBy(),
// but converts a non-visible result to not-found error.
//
// window can be used to force refresh of the target if it's
// deemed to be stale. Falls back to default window if nil.
func (p *Processor) GetVisibleTargetStatusBy(
ctx context.Context,
requester *gtsmodel.Account,
getTargetFromDB func() (*gtsmodel.Status, error),
window *dereferencing.FreshnessWindow,
) (
status *gtsmodel.Status,
errWithCode gtserror.WithCode,
) {
// Fetch the target status by ID from the database.
target, visible, errWithCode := p.GetTargetStatusBy(ctx,
requester,
getTargetFromDB,
window,
)
if errWithCode != nil {
return nil, errWithCode
}
if !visible {
// Target should not be seen by requester.
const text = "target status not found"
return nil, gtserror.NewErrorNotFound(
errors.New(text),
text,
)
}
return target, nil
}
// GetVisibleTargetStatus calls GetVisibleTargetStatusBy(),
// passing in a database function that fetches by status ID.
//
// window can be used to force refresh of the target if it's
// deemed to be stale. Falls back to default window if nil.
func (p *Processor) GetVisibleTargetStatus(
ctx context.Context,
requester *gtsmodel.Account,
targetID string,
window *dereferencing.FreshnessWindow,
) (
status *gtsmodel.Status,
errWithCode gtserror.WithCode,
) {
return p.GetVisibleTargetStatusBy(ctx, requester, func() (*gtsmodel.Status, error) {
return p.state.DB.GetStatusByID(ctx, targetID)
}, window)
}
// UnwrapIfBoost "unwraps" the given status if
// it's a boost wrapper, by returning the boosted
// status it targets (pending visibility checks).
//
// Just returns the input status if it's not a boost.
func (p *Processor) UnwrapIfBoost(
ctx context.Context,
requester *gtsmodel.Account,
status *gtsmodel.Status,
) (*gtsmodel.Status, gtserror.WithCode) {
if status.BoostOfID == "" {
return status, nil
}
return p.GetVisibleTargetStatus(ctx,
requester,
status.BoostOfID,
nil,
)
}
// GetAPIStatus fetches the appropriate API status model for target.
func (p *Processor) GetAPIStatus(
ctx context.Context,
requester *gtsmodel.Account,
target *gtsmodel.Status,
) (
apiStatus *apimodel.Status,
errWithCode gtserror.WithCode,
) {
apiStatus, err := p.converter.StatusToAPIStatus(ctx, target, requester, statusfilter.FilterContextNone, nil, nil)
if err != nil {
err = gtserror.Newf("error converting status: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
return apiStatus, nil
}
// InvalidateTimelinedStatus is a shortcut function for invalidating the cached
// representation one status in the home timeline and all list timelines of the
// given accountID. It should only be called in cases where a status update
// does *not* need to be passed into the processor via the worker queue, since
// such invalidation will, in that case, be handled by the processor instead.
func (p *Processor) InvalidateTimelinedStatus(ctx context.Context, accountID string, statusID string) error {
// Get lists first + bail if this fails.
lists, err := p.state.DB.GetListsForAccountID(ctx, accountID)
if err != nil {
return gtserror.Newf("db error getting lists for account %s: %w", accountID, err)
}
// Start new log entry with
// the above calling func's name.
l := log.
WithContext(ctx).
WithField("caller", log.Caller(3)).
WithField("accountID", accountID).
WithField("statusID", statusID)
// Unprepare item from home + list timelines, just log
// if something goes wrong since this is not a showstopper.
if err := p.state.Timelines.Home.UnprepareItem(ctx, accountID, statusID); err != nil {
l.Errorf("error unpreparing item from home timeline: %v", err)
}
for _, list := range lists {
if err := p.state.Timelines.List.UnprepareItem(ctx, list.ID, statusID); err != nil {
l.Errorf("error unpreparing item from list timeline %s: %v", list.ID, err)
}
}
return nil
}
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