1 files changed, 116 insertions, 0 deletions
diff --git a/internal/processing/account/createfollow.go b/internal/processing/account/createfollow.go
new file mode 100644
index 000000000..50e575f19
--- /dev/null
+++ b/internal/processing/account/createfollow.go
@@ -0,0 +1,116 @@
+/*
+   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 account
+
+import (
+	"fmt"
+
+	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/util"
+)
+
+func (p *processor) FollowCreate(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
+	blocked, err := p.db.Blocked(requestingAccount.ID, form.TargetAccountID)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+	if blocked {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("accountfollowcreate: block exists between accounts"))
+	}
+
+	// make sure the target account actually exists in our db
+	targetAcct := &gtsmodel.Account{}
+	if err := p.db.GetByID(form.TargetAccountID, targetAcct); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("accountfollowcreate: account %s not found in the db: %s", form.TargetAccountID, err))
+		}
+	}
+
+	// check if a follow exists already
+	follows, err := p.db.Follows(requestingAccount, targetAcct)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow in db: %s", err))
+	}
+	if follows {
+		// already follows so just return the relationship
+		return p.RelationshipGet(requestingAccount, form.TargetAccountID)
+	}
+
+	// check if a follow exists already
+	followRequested, err := p.db.FollowRequested(requestingAccount, targetAcct)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow request in db: %s", err))
+	}
+	if followRequested {
+		// already follow requested so just return the relationship
+		return p.RelationshipGet(requestingAccount, form.TargetAccountID)
+	}
+
+	// make the follow request
+	newFollowID, err := id.NewRandomULID()
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	fr := &gtsmodel.FollowRequest{
+		ID:              newFollowID,
+		AccountID:       requestingAccount.ID,
+		TargetAccountID: form.TargetAccountID,
+		ShowReblogs:     true,
+		URI:             util.GenerateURIForFollow(requestingAccount.Username, p.config.Protocol, p.config.Host, newFollowID),
+		Notify:          false,
+	}
+	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(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(requestingAccount.ID, form.TargetAccountID); 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(requestingAccount, form.TargetAccountID)
+	}
+
+	// otherwise we leave the follow request as it is and we handle the rest of the process asynchronously
+	p.fromClientAPI <- gtsmodel.FromClientAPI{
+		APObjectType:   gtsmodel.ActivityStreamsFollow,
+		APActivityType: gtsmodel.ActivityStreamsCreate,
+		GTSModel:       fr,
+		OriginAccount:  requestingAccount,
+		TargetAccount:  targetAcct,
+	}
+
+	// return whatever relationship results from this
+	return p.RelationshipGet(requestingAccount, form.TargetAccountID)
+}