gotosocial/internal/processing/account/follow.go
kim de6e3e5f2a
[performance] refactoring + add fave / follow / request / visibility caching (#1607)
* refactor visibility checking, add caching for visibility

* invalidate visibility cache items on account / status deletes

* fix requester ID passed to visibility cache nil ptr

* de-interface caches, fix home / public timeline caching + visibility

* finish adding code comments for visibility filter

* fix angry goconst linter warnings

* actually finish adding filter visibility code comments for timeline functions

* move home timeline status author check to after visibility

* remove now-unused code

* add more code comments

* add TODO code comment, update printed cache start names

* update printed cache names on stop

* start adding separate follow(request) delete db functions, add specific visibility cache tests

* add relationship type caching

* fix getting local account follows / followed-bys, other small codebase improvements

* simplify invalidation using cache hooks, add more GetAccountBy___() functions

* fix boosting to return 404 if not boostable but no error (to not leak status ID)

* remove dead code

* improved placement of cache invalidation

* update license headers

* add example follow, follow-request config entries

* add example visibility cache configuration to config file

* use specific PutFollowRequest() instead of just Put()

* add tests for all GetAccountBy()

* add GetBlockBy() tests

* update block to check primitive fields

* update and finish adding Get{Account,Block,Follow,FollowRequest}By() tests

* fix copy-pasted code

* update envparsing test

* whitespace

* fix bun struct tag

* add license header to gtscontext

* fix old license header

* improved error creation to not use fmt.Errorf() when not needed

* fix various rebase conflicts, fix account test

* remove commented-out code, fix-up mention caching

* fix mention select bun statement

* ensure mention target account populated, pass in context to customrenderer logging

* remove more uncommented code, fix typeutil test

* add statusfave database model caching

* add status fave cache configuration

* add status fave cache example config

* woops, catch missed error. nice catch linter!

* add back testrig panic on nil db

* update example configuration to match defaults, slight tweak to cache configuration defaults

* update envparsing test with new defaults

* fetch followingget to use the follow target account

* use accounnt.IsLocal() instead of empty domain check

* use constants for the cache visibility type check

* use bun.In() for notification type restriction in db query

* include replies when fetching PublicTimeline() (to account for single-author threads in Visibility{}.StatusPublicTimelineable())

* use bun query building for nested select statements to ensure working with postgres

* update public timeline future status checks to match visibility filter

* same as previous, for home timeline

* update public timeline tests to dynamically check for appropriate statuses

* migrate accounts to allow unique constraint on public_key

* provide minimal account with publicKey

---------

Signed-off-by: kim <grufwub@gmail.com>
Co-authored-by: tsmethurst <tobi.smethurst@protonmail.com>
2023-03-28 14:03:14 +01:00

251 lines
9.5 KiB
Go

// 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"
"github.com/superseriousbusiness/gotosocial/internal/ap"
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/id"
"github.com/superseriousbusiness/gotosocial/internal/messages"
"github.com/superseriousbusiness/gotosocial/internal/uris"
)
// FollowCreate handles a follow request to an account, either remote or local.
func (p *Processor) FollowCreate(ctx context.Context, requestingAccount *gtsmodel.Account, form *apimodel.AccountFollowRequest) (*apimodel.Relationship, gtserror.WithCode) {
targetAccount, errWithCode := p.getFollowTarget(ctx, requestingAccount.ID, form.ID)
if errWithCode != nil {
return nil, errWithCode
}
// Check if a follow exists already.
if follows, err := p.state.DB.IsFollowing(ctx, requestingAccount.ID, targetAccount.ID); err != nil {
err = fmt.Errorf("FollowCreate: db error checking follow: %w", err)
return nil, gtserror.NewErrorInternalError(err)
} else if follows {
// Already follows, just return current relationship.
return p.RelationshipGet(ctx, requestingAccount, form.ID)
}
// Check if a follow request exists already.
if followRequested, err := p.state.DB.IsFollowRequested(ctx, requestingAccount.ID, targetAccount.ID); err != nil {
err = fmt.Errorf("FollowCreate: db error checking follow request: %w", err)
return nil, gtserror.NewErrorInternalError(err)
} else if followRequested {
// Already follow requested, just return current relationship.
return p.RelationshipGet(ctx, requestingAccount, form.ID)
}
// Create and store a new follow request.
followID, err := id.NewRandomULID()
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
followURI := uris.GenerateURIForFollow(requestingAccount.Username, followID)
fr := &gtsmodel.FollowRequest{
ID: followID,
URI: followURI,
AccountID: requestingAccount.ID,
Account: requestingAccount,
TargetAccountID: form.ID,
TargetAccount: targetAccount,
ShowReblogs: form.Reblogs,
Notify: form.Notify,
}
if err := p.state.DB.PutFollowRequest(ctx, fr); err != nil {
err = fmt.Errorf("FollowCreate: error creating follow request in db: %s", err)
return nil, gtserror.NewErrorInternalError(err)
}
if targetAccount.IsLocal() && !*targetAccount.Locked {
// If the target account is local and not locked,
// we can already accept the follow request and
// skip any further processing.
//
// Because we know the requestingAccount is also
// local, we don't need to federate the accept out.
if _, err := p.state.DB.AcceptFollowRequest(ctx, requestingAccount.ID, form.ID); err != nil {
err = fmt.Errorf("FollowCreate: error accepting follow request for local unlocked account: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
} else if targetAccount.IsRemote() {
// Otherwise we leave the follow request as it is,
// and we handle the rest of the process async.
p.state.Workers.EnqueueClientAPI(ctx, messages.FromClientAPI{
APObjectType: ap.ActivityFollow,
APActivityType: ap.ActivityCreate,
GTSModel: fr,
OriginAccount: requestingAccount,
TargetAccount: targetAccount,
})
}
return p.RelationshipGet(ctx, requestingAccount, form.ID)
}
// FollowRemove handles the removal of a follow/follow request to an account, either remote or local.
func (p *Processor) FollowRemove(ctx context.Context, requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode) {
targetAccount, errWithCode := p.getFollowTarget(ctx, requestingAccount.ID, targetAccountID)
if errWithCode != nil {
return nil, errWithCode
}
// Unfollow and deal with side effects.
msgs, err := p.unfollow(ctx, requestingAccount, targetAccount)
if err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("FollowRemove: account %s not found in the db: %s", targetAccountID, err))
}
// Batch queue accreted client api messages.
p.state.Workers.EnqueueClientAPI(ctx, msgs...)
return p.RelationshipGet(ctx, requestingAccount, targetAccountID)
}
/*
Utility functions.
*/
// getFollowTarget is a convenience function which:
// - Checks if account is trying to follow/unfollow itself.
// - Returns not found if there's a block in place between accounts.
// - Returns target account according to its id.
func (p *Processor) getFollowTarget(ctx context.Context, requestingAccountID string, targetAccountID string) (*gtsmodel.Account, gtserror.WithCode) {
// Account can't follow or unfollow itself.
if requestingAccountID == targetAccountID {
err := errors.New("account can't follow or unfollow itself")
return nil, gtserror.NewErrorNotAcceptable(err)
}
// Do nothing if a block exists in either direction between accounts.
if blocked, err := p.state.DB.IsEitherBlocked(ctx, requestingAccountID, targetAccountID); err != nil {
err = fmt.Errorf("db error checking block between accounts: %w", err)
return nil, gtserror.NewErrorInternalError(err)
} else if blocked {
err = errors.New("block exists between accounts")
return nil, gtserror.NewErrorNotFound(err)
}
// Ensure target account retrievable.
targetAccount, err := p.state.DB.GetAccountByID(ctx, targetAccountID)
if err != nil {
if !errors.Is(err, db.ErrNoEntries) {
// Real db error.
err = fmt.Errorf("db error looking for target account %s: %w", targetAccountID, err)
return nil, gtserror.NewErrorInternalError(err)
}
// Account not found.
err = fmt.Errorf("target account %s not found in the db", targetAccountID)
return nil, gtserror.NewErrorNotFound(err, err.Error())
}
return targetAccount, nil
}
// unfollow is a convenience function for having requesting account
// unfollow (and un follow request) target account, if follows and/or
// follow requests exist.
//
// If a follow and/or follow request was removed this way, one or two
// messages will be returned which should then be processed by a client
// api worker.
func (p *Processor) unfollow(ctx context.Context, requestingAccount *gtsmodel.Account, targetAccount *gtsmodel.Account) ([]messages.FromClientAPI, error) {
var msgs []messages.FromClientAPI
// Get follow from requesting account to target account.
follow, err := p.state.DB.GetFollow(ctx, requestingAccount.ID, targetAccount.ID)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err = fmt.Errorf("unfollow: error getting follow from %s targeting %s: %w", requestingAccount.ID, targetAccount.ID, err)
return nil, err
}
if follow != nil {
// Delete known follow from database with ID.
err = p.state.DB.DeleteFollowByID(ctx, follow.ID)
if err != nil {
if !errors.Is(err, db.ErrNoEntries) {
err = fmt.Errorf("unfollow: error deleting request from %s targeting %s: %w", requestingAccount.ID, targetAccount.ID, err)
return nil, err
}
// If err == db.ErrNoEntries here then it
// indicates a race condition with another
// unfollow for the same requester->target.
return msgs, nil
}
// Follow status changed, process side effects.
msgs = append(msgs, messages.FromClientAPI{
APObjectType: ap.ActivityFollow,
APActivityType: ap.ActivityUndo,
GTSModel: &gtsmodel.Follow{
AccountID: requestingAccount.ID,
TargetAccountID: targetAccount.ID,
URI: follow.URI,
},
OriginAccount: requestingAccount,
TargetAccount: targetAccount,
})
}
// Get follow request from requesting account to target account.
followReq, err := p.state.DB.GetFollowRequest(ctx, requestingAccount.ID, targetAccount.ID)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
err = fmt.Errorf("unfollow: error getting follow request from %s targeting %s: %w", requestingAccount.ID, targetAccount.ID, err)
return nil, err
}
if followReq != nil {
// Delete known follow request from database with ID.
err = p.state.DB.DeleteFollowRequestByID(ctx, followReq.ID)
if err != nil {
if !errors.Is(err, db.ErrNoEntries) {
err = fmt.Errorf("unfollow: error deleting follow request from %s targeting %s: %w", requestingAccount.ID, targetAccount.ID, err)
return nil, err
}
// If err == db.ErrNoEntries here then it
// indicates a race condition with another
// unfollow for the same requester->target.
return msgs, nil
}
// Follow status changed, process side effects.
msgs = append(msgs, messages.FromClientAPI{
APObjectType: ap.ActivityFollow,
APActivityType: ap.ActivityUndo,
GTSModel: &gtsmodel.Follow{
AccountID: requestingAccount.ID,
TargetAccountID: targetAccount.ID,
URI: followReq.URI,
},
OriginAccount: requestingAccount,
TargetAccount: targetAccount,
})
}
return msgs, nil
}