Notifications (#34)

Notifications working for:

* Mentions
* Faves
* New follow requests
* New followers

1 files changed, 161 insertions, 0 deletions

diff --git a/internal/federation/federatingdb/create.go b/internal/federation/federatingdb/create.go
new file mode 100644
index 000000000..026674e43
--- /dev/null
+++ b/internal/federation/federatingdb/create.go
@@ -0,0 +1,161 @@
+/*
+   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 federatingdb
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+// Create adds a new entry to the database which must be able to be
+// keyed by its id.
+//
+// Note that Activity values received from federated peers may also be
+// created in the database this way if the Federating Protocol is
+// enabled. The client may freely decide to store only the id instead of
+// the entire value.
+//
+// The library makes this call only after acquiring a lock first.
+//
+// Under certain conditions and network activities, Create may be called
+// multiple times for the same ActivityStreams object.
+func (f *federatingDB) Create(ctx context.Context, asType vocab.Type) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":   "Create",
+			"asType": asType.GetTypeName(),
+		},
+	)
+	m, err := streams.Serialize(asType)
+	if err != nil {
+		return err
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return err
+	}
+
+	l.Debugf("received CREATE asType %s", string(b))
+
+	targetAcctI := ctx.Value(util.APAccount)
+	if targetAcctI == nil {
+		l.Error("target account wasn't set on context")
+		return nil
+	}
+	targetAcct, ok := targetAcctI.(*gtsmodel.Account)
+	if !ok {
+		l.Error("target account was set on context but couldn't be parsed")
+		return nil
+	}
+
+	fromFederatorChanI := ctx.Value(util.APFromFederatorChanKey)
+	if fromFederatorChanI == nil {
+		l.Error("from federator channel wasn't set on context")
+		return nil
+	}
+	fromFederatorChan, ok := fromFederatorChanI.(chan gtsmodel.FromFederator)
+	if !ok {
+		l.Error("from federator channel was set on context but couldn't be parsed")
+		return nil
+	}
+
+	switch asType.GetTypeName() {
+	case gtsmodel.ActivityStreamsCreate:
+		create, ok := asType.(vocab.ActivityStreamsCreate)
+		if !ok {
+			return errors.New("could not convert type to create")
+		}
+		object := create.GetActivityStreamsObject()
+		for objectIter := object.Begin(); objectIter != object.End(); objectIter = objectIter.Next() {
+			switch objectIter.GetType().GetTypeName() {
+			case gtsmodel.ActivityStreamsNote:
+				note := objectIter.GetActivityStreamsNote()
+				status, err := f.typeConverter.ASStatusToStatus(note)
+				if err != nil {
+					return fmt.Errorf("error converting note to status: %s", err)
+				}
+				if err := f.db.Put(status); err != nil {
+					if _, ok := err.(db.ErrAlreadyExists); ok {
+						return nil
+					}
+					return fmt.Errorf("database error inserting status: %s", err)
+				}
+
+				fromFederatorChan <- gtsmodel.FromFederator{
+					APObjectType:     gtsmodel.ActivityStreamsNote,
+					APActivityType:   gtsmodel.ActivityStreamsCreate,
+					GTSModel:         status,
+					ReceivingAccount: targetAcct,
+				}
+			}
+		}
+	case gtsmodel.ActivityStreamsFollow:
+		follow, ok := asType.(vocab.ActivityStreamsFollow)
+		if !ok {
+			return errors.New("could not convert type to follow")
+		}
+
+		followRequest, err := f.typeConverter.ASFollowToFollowRequest(follow)
+		if err != nil {
+			return fmt.Errorf("could not convert Follow to follow request: %s", err)
+		}
+
+		if err := f.db.Put(followRequest); err != nil {
+			return fmt.Errorf("database error inserting follow request: %s", err)
+		}
+
+		fromFederatorChan <- gtsmodel.FromFederator{
+			APObjectType:     gtsmodel.ActivityStreamsFollow,
+			APActivityType:   gtsmodel.ActivityStreamsCreate,
+			GTSModel:         followRequest,
+			ReceivingAccount: targetAcct,
+		}
+	case gtsmodel.ActivityStreamsLike:
+		like, ok := asType.(vocab.ActivityStreamsLike)
+		if !ok {
+			return errors.New("could not convert type to like")
+		}
+
+		fave, err := f.typeConverter.ASLikeToFave(like)
+		if err != nil {
+			return fmt.Errorf("could not convert Like to fave: %s", err)
+		}
+
+		if err := f.db.Put(fave); err != nil {
+			return fmt.Errorf("database error inserting fave: %s", err)
+		}
+
+		fromFederatorChan <- gtsmodel.FromFederator{
+			APObjectType:     gtsmodel.ActivityStreamsLike,
+			APActivityType:   gtsmodel.ActivityStreamsCreate,
+			GTSModel:         fave,
+			ReceivingAccount: targetAcct,
+		}
+	}
+	return nil
+}