diff options
Diffstat (limited to 'internal/processing/account/follow.go')
| -rw-r--r-- | internal/processing/account/follow.go | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/internal/processing/account/follow.go b/internal/processing/account/follow.go new file mode 100644 index 000000000..d4d479be7 --- /dev/null +++ b/internal/processing/account/follow.go @@ -0,0 +1,205 @@ +/* + GoToSocial + Copyright (C) 2021-2023 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 account + +import ( + "context" + "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) { + // if there's a block between the accounts we shouldn't create the request ofc + if blocked, err := p.db.IsBlocked(ctx, requestingAccount.ID, form.ID, true); err != nil { + return nil, gtserror.NewErrorInternalError(err) + } else if blocked { + return nil, gtserror.NewErrorNotFound(fmt.Errorf("block exists between accounts")) + } + + // make sure the target account actually exists in our db + targetAcct, err := p.db.GetAccountByID(ctx, form.ID) + if err != nil { + if err == db.ErrNoEntries { + return nil, gtserror.NewErrorNotFound(fmt.Errorf("accountfollowcreate: account %s not found in the db: %s", form.ID, err)) + } + return nil, gtserror.NewErrorInternalError(err) + } + + // check if a follow exists already + if follows, err := p.db.IsFollowing(ctx, requestingAccount, targetAcct); err != nil { + return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow in db: %s", err)) + } else if follows { + // already follows so just return the relationship + return p.RelationshipGet(ctx, requestingAccount, form.ID) + } + + // check if a follow request exists already + if followRequested, err := p.db.IsFollowRequested(ctx, requestingAccount, targetAcct); err != nil { + return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow request in db: %s", err)) + } else if followRequested { + // already follow requested so just return the relationship + return p.RelationshipGet(ctx, requestingAccount, form.ID) + } + + // check for attempt to follow self + if requestingAccount.ID == targetAcct.ID { + return nil, gtserror.NewErrorNotAcceptable(fmt.Errorf("accountfollowcreate: account %s cannot follow itself", requestingAccount.ID)) + } + + // make the follow request + newFollowID, err := id.NewRandomULID() + if err != nil { + return nil, gtserror.NewErrorInternalError(err) + } + + showReblogs := true + notify := false + fr := >smodel.FollowRequest{ + ID: newFollowID, + AccountID: requestingAccount.ID, + TargetAccountID: form.ID, + ShowReblogs: &showReblogs, + URI: uris.GenerateURIForFollow(requestingAccount.Username, newFollowID), + Notify: ¬ify, + } + if form.Reblogs != nil { + fr.ShowReblogs = form.Reblogs + } + if form.Notify != nil { + fr.Notify = form.Notify + } + + // whack it in the database + if err := p.db.Put(ctx, fr); err != nil { + return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error creating follow request in db: %s", err)) + } + + // if it's a local account that's not locked we can just straight up accept the follow request + if !*targetAcct.Locked && targetAcct.Domain == "" { + if _, err := p.db.AcceptFollowRequest(ctx, requestingAccount.ID, form.ID); err != nil { + return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error accepting folow request for local unlocked account: %s", err)) + } + // return the new relationship + return p.RelationshipGet(ctx, requestingAccount, form.ID) + } + + // otherwise we leave the follow request as it is and we handle the rest of the process asynchronously + p.clientWorker.Queue(messages.FromClientAPI{ + APObjectType: ap.ActivityFollow, + APActivityType: ap.ActivityCreate, + GTSModel: fr, + OriginAccount: requestingAccount, + TargetAccount: targetAcct, + }) + + // return whatever relationship results from this + 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) { + // if there's a block between the accounts we shouldn't do anything + blocked, err := p.db.IsBlocked(ctx, requestingAccount.ID, targetAccountID, true) + if err != nil { + return nil, gtserror.NewErrorInternalError(err) + } + if blocked { + return nil, gtserror.NewErrorNotFound(fmt.Errorf("AccountFollowRemove: block exists between accounts")) + } + + // make sure the target account actually exists in our db + targetAcct, err := p.db.GetAccountByID(ctx, targetAccountID) + if err != nil { + if err == db.ErrNoEntries { + return nil, gtserror.NewErrorNotFound(fmt.Errorf("AccountFollowRemove: account %s not found in the db: %s", targetAccountID, err)) + } + } + + // check if a follow request exists, and remove it if it does (storing the URI for later) + var frChanged bool + var frURI string + fr := >smodel.FollowRequest{} + if err := p.db.GetWhere(ctx, []db.Where{ + {Key: "account_id", Value: requestingAccount.ID}, + {Key: "target_account_id", Value: targetAccountID}, + }, fr); err == nil { + frURI = fr.URI + if err := p.db.DeleteByID(ctx, fr.ID, fr); err != nil { + return nil, gtserror.NewErrorInternalError(fmt.Errorf("AccountFollowRemove: error removing follow request from db: %s", err)) + } + frChanged = true + } + + // now do the same thing for any existing follow + var fChanged bool + var fURI string + f := >smodel.Follow{} + if err := p.db.GetWhere(ctx, []db.Where{ + {Key: "account_id", Value: requestingAccount.ID}, + {Key: "target_account_id", Value: targetAccountID}, + }, f); err == nil { + fURI = f.URI + if err := p.db.DeleteByID(ctx, f.ID, f); err != nil { + return nil, gtserror.NewErrorInternalError(fmt.Errorf("AccountFollowRemove: error removing follow from db: %s", err)) + } + fChanged = true + } + + // follow request status changed so send the UNDO activity to the channel for async processing + if frChanged { + p.clientWorker.Queue(messages.FromClientAPI{ + APObjectType: ap.ActivityFollow, + APActivityType: ap.ActivityUndo, + GTSModel: >smodel.Follow{ + AccountID: requestingAccount.ID, + TargetAccountID: targetAccountID, + URI: frURI, + }, + OriginAccount: requestingAccount, + TargetAccount: targetAcct, + }) + } + + // follow status changed so send the UNDO activity to the channel for async processing + if fChanged { + p.clientWorker.Queue(messages.FromClientAPI{ + APObjectType: ap.ActivityFollow, + APActivityType: ap.ActivityUndo, + GTSModel: >smodel.Follow{ + AccountID: requestingAccount.ID, + TargetAccountID: targetAccountID, + URI: fURI, + }, + OriginAccount: requestingAccount, + TargetAccount: targetAcct, + }) + } + + // return whatever relationship results from all this + return p.RelationshipGet(ctx, requestingAccount, targetAccountID) +} |