310 lines
10 KiB
Go
310 lines
10 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package processing
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import (
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"context"
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"errors"
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"fmt"
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apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
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"github.com/superseriousbusiness/gotosocial/internal/db"
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"github.com/superseriousbusiness/gotosocial/internal/gtserror"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/log"
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"github.com/superseriousbusiness/gotosocial/internal/oauth"
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"github.com/superseriousbusiness/gotosocial/internal/timeline"
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"github.com/superseriousbusiness/gotosocial/internal/typeutils"
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"github.com/superseriousbusiness/gotosocial/internal/util"
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"github.com/superseriousbusiness/gotosocial/internal/visibility"
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)
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const boostReinsertionDepth = 50
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// StatusGrabFunction returns a function that satisfies the GrabFunction interface in internal/timeline.
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func StatusGrabFunction(database db.DB) timeline.GrabFunction {
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return func(ctx context.Context, timelineAccountID string, maxID string, sinceID string, minID string, limit int) ([]timeline.Timelineable, bool, error) {
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statuses, err := database.GetHomeTimeline(ctx, timelineAccountID, maxID, sinceID, minID, limit, false)
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if err != nil {
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if errors.Is(err, db.ErrNoEntries) {
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return nil, true, nil // we just don't have enough statuses left in the db so return stop = true
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}
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return nil, false, fmt.Errorf("statusGrabFunction: error getting statuses from db: %w", err)
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}
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items := make([]timeline.Timelineable, len(statuses))
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for i, s := range statuses {
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items[i] = s
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}
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return items, false, nil
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}
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}
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// StatusFilterFunction returns a function that satisfies the FilterFunction interface in internal/timeline.
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func StatusFilterFunction(database db.DB, filter *visibility.Filter) timeline.FilterFunction {
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return func(ctx context.Context, timelineAccountID string, item timeline.Timelineable) (shouldIndex bool, err error) {
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status, ok := item.(*gtsmodel.Status)
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if !ok {
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return false, errors.New("StatusFilterFunction: could not convert item to *gtsmodel.Status")
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}
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requestingAccount, err := database.GetAccountByID(ctx, timelineAccountID)
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if err != nil {
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return false, fmt.Errorf("StatusFilterFunction: error getting account with id %s: %w", timelineAccountID, err)
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}
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timelineable, err := filter.StatusHomeTimelineable(ctx, requestingAccount, status)
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if err != nil {
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return false, fmt.Errorf("StatusFilterFunction: error checking hometimelineability of status %s for account %s: %w", status.ID, timelineAccountID, err)
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}
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return timelineable, nil
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}
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}
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// StatusPrepareFunction returns a function that satisfies the PrepareFunction interface in internal/timeline.
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func StatusPrepareFunction(database db.DB, tc typeutils.TypeConverter) timeline.PrepareFunction {
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return func(ctx context.Context, timelineAccountID string, itemID string) (timeline.Preparable, error) {
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status, err := database.GetStatusByID(ctx, itemID)
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if err != nil {
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return nil, fmt.Errorf("StatusPrepareFunction: error getting status with id %s: %w", itemID, err)
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}
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requestingAccount, err := database.GetAccountByID(ctx, timelineAccountID)
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if err != nil {
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return nil, fmt.Errorf("StatusPrepareFunction: error getting account with id %s: %w", timelineAccountID, err)
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}
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return tc.StatusToAPIStatus(ctx, status, requestingAccount)
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}
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}
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// StatusSkipInsertFunction returns a function that satisifes the SkipInsertFunction interface in internal/timeline.
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func StatusSkipInsertFunction() timeline.SkipInsertFunction {
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return func(
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ctx context.Context,
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newItemID string,
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newItemAccountID string,
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newItemBoostOfID string,
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newItemBoostOfAccountID string,
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nextItemID string,
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nextItemAccountID string,
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nextItemBoostOfID string,
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nextItemBoostOfAccountID string,
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depth int,
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) (bool, error) {
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// make sure we don't insert a duplicate
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if newItemID == nextItemID {
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return true, nil
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}
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// check if it's a boost
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if newItemBoostOfID != "" {
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// skip if we've recently put another boost of this status in the timeline
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if newItemBoostOfID == nextItemBoostOfID {
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if depth < boostReinsertionDepth {
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return true, nil
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}
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}
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// skip if we've recently put the original status in the timeline
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if newItemBoostOfID == nextItemID {
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if depth < boostReinsertionDepth {
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return true, nil
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}
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}
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}
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// insert the item
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return false, nil
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}
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}
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func (p *Processor) HomeTimelineGet(ctx context.Context, authed *oauth.Auth, maxID string, sinceID string, minID string, limit int, local bool) (*apimodel.PageableResponse, gtserror.WithCode) {
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statuses, err := p.statusTimelines.GetTimeline(ctx, authed.Account.ID, maxID, sinceID, minID, limit, local)
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if err != nil {
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err = fmt.Errorf("HomeTimelineGet: error getting statuses: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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}
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count := len(statuses)
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if count == 0 {
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return util.EmptyPageableResponse(), nil
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}
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var (
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items = make([]interface{}, count)
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nextMaxIDValue string
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prevMinIDValue string
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)
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for i, item := range statuses {
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if i == count-1 {
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nextMaxIDValue = item.GetID()
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}
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if i == 0 {
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prevMinIDValue = item.GetID()
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}
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items[i] = item
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}
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return util.PackagePageableResponse(util.PageableResponseParams{
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Items: items,
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Path: "api/v1/timelines/home",
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NextMaxIDValue: nextMaxIDValue,
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PrevMinIDValue: prevMinIDValue,
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Limit: limit,
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})
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}
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func (p *Processor) PublicTimelineGet(ctx context.Context, authed *oauth.Auth, maxID string, sinceID string, minID string, limit int, local bool) (*apimodel.PageableResponse, gtserror.WithCode) {
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statuses, err := p.state.DB.GetPublicTimeline(ctx, maxID, sinceID, minID, limit, local)
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if err != nil {
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if errors.Is(err, db.ErrNoEntries) {
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// No statuses (left) in public timeline.
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return util.EmptyPageableResponse(), nil
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}
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// An actual error has occurred.
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err = fmt.Errorf("PublicTimelineGet: db error getting statuses: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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}
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count := len(statuses)
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if count == 0 {
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return util.EmptyPageableResponse(), nil
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}
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var (
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items = make([]interface{}, 0, count)
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nextMaxIDValue string
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prevMinIDValue string
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)
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for i, s := range statuses {
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// Set next + prev values before filtering and API
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// converting, so caller can still page properly.
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if i == count-1 {
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nextMaxIDValue = s.ID
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}
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if i == 0 {
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prevMinIDValue = s.ID
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}
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timelineable, err := p.filter.StatusPublicTimelineable(ctx, authed.Account, s)
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if err != nil {
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log.Debugf(ctx, "skipping status %s because of an error checking StatusPublicTimelineable: %s", s.ID, err)
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continue
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}
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if !timelineable {
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continue
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}
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apiStatus, err := p.tc.StatusToAPIStatus(ctx, s, authed.Account)
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if err != nil {
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log.Debugf(ctx, "skipping status %s because it couldn't be converted to its api representation: %s", s.ID, err)
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continue
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}
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items = append(items, apiStatus)
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}
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return util.PackagePageableResponse(util.PageableResponseParams{
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Items: items,
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Path: "api/v1/timelines/public",
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NextMaxIDValue: nextMaxIDValue,
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PrevMinIDValue: prevMinIDValue,
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Limit: limit,
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})
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}
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func (p *Processor) FavedTimelineGet(ctx context.Context, authed *oauth.Auth, maxID string, minID string, limit int) (*apimodel.PageableResponse, gtserror.WithCode) {
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statuses, nextMaxID, prevMinID, err := p.state.DB.GetFavedTimeline(ctx, authed.Account.ID, maxID, minID, limit)
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if err != nil {
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if errors.Is(err, db.ErrNoEntries) {
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// There are just no entries (left).
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return util.EmptyPageableResponse(), nil
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}
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// An actual error has occurred.
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err = fmt.Errorf("FavedTimelineGet: db error getting statuses: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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}
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count := len(statuses)
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if count == 0 {
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return util.EmptyPageableResponse(), nil
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}
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filtered, err := p.filterFavedStatuses(ctx, authed, statuses)
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if err != nil {
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err = fmt.Errorf("FavedTimelineGet: error filtering statuses: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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}
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items := make([]interface{}, len(filtered))
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for i, item := range filtered {
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items[i] = item
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}
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return util.PackagePageableResponse(util.PageableResponseParams{
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Items: items,
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Path: "api/v1/favourites",
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NextMaxIDValue: nextMaxID,
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PrevMinIDValue: prevMinID,
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Limit: limit,
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})
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}
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func (p *Processor) filterFavedStatuses(ctx context.Context, authed *oauth.Auth, statuses []*gtsmodel.Status) ([]*apimodel.Status, error) {
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apiStatuses := make([]*apimodel.Status, 0, len(statuses))
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for _, s := range statuses {
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if _, err := p.state.DB.GetAccountByID(ctx, s.AccountID); err != nil {
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if errors.Is(err, db.ErrNoEntries) {
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log.Debugf(ctx, "skipping status %s because account %s can't be found in the db", s.ID, s.AccountID)
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continue
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}
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err = fmt.Errorf("filterFavedStatuses: db error getting status author: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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}
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timelineable, err := p.filter.StatusVisible(ctx, authed.Account, s)
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if err != nil {
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log.Debugf(ctx, "skipping status %s because of an error checking status visibility: %s", s.ID, err)
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continue
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}
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if !timelineable {
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continue
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}
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apiStatus, err := p.tc.StatusToAPIStatus(ctx, s, authed.Account)
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if err != nil {
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log.Debugf(ctx, "skipping status %s because it couldn't be converted to its api representation: %s", s.ID, err)
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continue
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}
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apiStatuses = append(apiStatuses, apiStatus)
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}
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return apiStatuses, nil
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}
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