gotosocial/internal/processing/timeline.go
Tobi Smethurst aa8a0d0850
Streaming (#49)
Add new status and notification websocket streaming capabilities
2021-06-19 11:18:55 +02:00

215 lines
7 KiB
Go

/*
GoToSocial
Copyright (C) 2021 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 processing
import (
"fmt"
"net/url"
"sync"
"github.com/sirupsen/logrus"
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/oauth"
)
func (p *processor) HomeTimelineGet(authed *oauth.Auth, maxID string, sinceID string, minID string, limit int, local bool) (*apimodel.StatusTimelineResponse, gtserror.WithCode) {
resp := &apimodel.StatusTimelineResponse{
Statuses: []*apimodel.Status{},
}
apiStatuses, err := p.timelineManager.HomeTimeline(authed.Account.ID, maxID, sinceID, minID, limit, local)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
resp.Statuses = apiStatuses
// prepare the next and previous links
if len(apiStatuses) != 0 {
nextLink := &url.URL{
Scheme: p.config.Protocol,
Host: p.config.Host,
Path: "/api/v1/timelines/home",
RawPath: url.PathEscape("api/v1/timelines/home"),
RawQuery: fmt.Sprintf("limit=%d&max_id=%s", limit, apiStatuses[len(apiStatuses)-1].ID),
}
next := fmt.Sprintf("<%s>; rel=\"next\"", nextLink.String())
prevLink := &url.URL{
Scheme: p.config.Protocol,
Host: p.config.Host,
Path: "/api/v1/timelines/home",
RawQuery: fmt.Sprintf("limit=%d&min_id=%s", limit, apiStatuses[0].ID),
}
prev := fmt.Sprintf("<%s>; rel=\"prev\"", prevLink.String())
resp.LinkHeader = fmt.Sprintf("%s, %s", next, prev)
}
return resp, nil
}
func (p *processor) PublicTimelineGet(authed *oauth.Auth, maxID string, sinceID string, minID string, limit int, local bool) ([]*apimodel.Status, gtserror.WithCode) {
statuses, err := p.db.GetPublicTimelineForAccount(authed.Account.ID, maxID, sinceID, minID, limit, local)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
s, err := p.filterStatuses(authed, statuses)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
return s, nil
}
func (p *processor) filterStatuses(authed *oauth.Auth, statuses []*gtsmodel.Status) ([]*apimodel.Status, error) {
l := p.log.WithField("func", "filterStatuses")
apiStatuses := []*apimodel.Status{}
for _, s := range statuses {
targetAccount := &gtsmodel.Account{}
if err := p.db.GetByID(s.AccountID, targetAccount); err != nil {
if _, ok := err.(db.ErrNoEntries); ok {
l.Debugf("skipping status %s because account %s can't be found in the db", s.ID, s.AccountID)
continue
}
return nil, gtserror.NewErrorInternalError(fmt.Errorf("HomeTimelineGet: error getting status author: %s", err))
}
timelineable, err := p.filter.StatusHometimelineable(s, authed.Account)
if err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("HomeTimelineGet: error checking status visibility: %s", err))
}
if !timelineable {
continue
}
apiStatus, err := p.tc.StatusToMasto(s, authed.Account)
if err != nil {
l.Debugf("skipping status %s because it couldn't be converted to its mastodon representation: %s", s.ID, err)
continue
}
apiStatuses = append(apiStatuses, apiStatus)
}
return apiStatuses, nil
}
func (p *processor) initTimelines() error {
// get all local accounts (ie., domain = nil) that aren't suspended (suspended_at = nil)
localAccounts := []*gtsmodel.Account{}
where := []db.Where{
{
Key: "domain", Value: nil,
},
{
Key: "suspended_at", Value: nil,
},
}
if err := p.db.GetWhere(where, &localAccounts); err != nil {
if _, ok := err.(db.ErrNoEntries); ok {
return nil
}
return fmt.Errorf("initTimelines: db error initializing timelines: %s", err)
}
// we want to wait until all timelines are populated so created a waitgroup here
wg := &sync.WaitGroup{}
wg.Add(len(localAccounts))
for _, localAccount := range localAccounts {
// to save time we can populate the timelines asynchronously
// this will go heavy on the database, but since we're not actually serving yet it doesn't really matter
go p.initTimelineFor(localAccount, wg)
}
// wait for all timelines to be populated before we exit
wg.Wait()
return nil
}
func (p *processor) initTimelineFor(account *gtsmodel.Account, wg *sync.WaitGroup) {
defer wg.Done()
l := p.log.WithFields(logrus.Fields{
"func": "initTimelineFor",
"accountID": account.ID,
})
desiredIndexLength := p.timelineManager.GetDesiredIndexLength()
statuses, err := p.db.GetStatusesWhereFollowing(account.ID, "", "", "", desiredIndexLength, false)
if err != nil {
if _, ok := err.(db.ErrNoEntries); !ok {
l.Error(fmt.Errorf("initTimelineFor: error getting statuses: %s", err))
}
return
}
p.indexAndIngest(statuses, account, desiredIndexLength)
lengthNow := p.timelineManager.GetIndexedLength(account.ID)
if lengthNow < desiredIndexLength {
// try and get more posts from the last ID onwards
rearmostStatusID, err := p.timelineManager.GetOldestIndexedID(account.ID)
if err != nil {
l.Error(fmt.Errorf("initTimelineFor: error getting id of rearmost status: %s", err))
return
}
if rearmostStatusID != "" {
moreStatuses, err := p.db.GetStatusesWhereFollowing(account.ID, rearmostStatusID, "", "", desiredIndexLength/2, false)
if err != nil {
l.Error(fmt.Errorf("initTimelineFor: error getting more statuses: %s", err))
return
}
p.indexAndIngest(moreStatuses, account, desiredIndexLength)
}
}
l.Debugf("prepared timeline of length %d for account %s", lengthNow, account.ID)
}
func (p *processor) indexAndIngest(statuses []*gtsmodel.Status, timelineAccount *gtsmodel.Account, desiredIndexLength int) {
l := p.log.WithFields(logrus.Fields{
"func": "indexAndIngest",
"accountID": timelineAccount.ID,
})
for _, s := range statuses {
timelineable, err := p.filter.StatusHometimelineable(s, timelineAccount)
if err != nil {
l.Error(fmt.Errorf("initTimelineFor: error checking home timelineability of status %s: %s", s.ID, err))
continue
}
if timelineable {
if _, err := p.timelineManager.Ingest(s, timelineAccount.ID); err != nil {
l.Error(fmt.Errorf("initTimelineFor: error ingesting status %s: %s", s.ID, err))
continue
}
// check if we have enough posts now and return if we do
if p.timelineManager.GetIndexedLength(timelineAccount.ID) >= desiredIndexLength {
return
}
}
}
}