Notifications (#34)

Notifications working for:

* Mentions
* Faves
* New follow requests
* New followers

internal/federation/federatingdb/accept.go

@@ -0,0 +1,94 @@
+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/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+func (f *federatingDB) Accept(ctx context.Context, accept vocab.ActivityStreamsAccept) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func":   "Accept",
+			"asType": accept.GetTypeName(),
+		},
+	)
+	m, err := streams.Serialize(accept)
+	if err != nil {
+		return err
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return err
+	}
+	l.Debugf("received ACCEPT asType %s", string(b))
+
+	fromFederatorChanI := ctx.Value(util.APFromFederatorChanKey)
+	if fromFederatorChanI == nil {
+		l.Error("ACCEPT: from federator channel wasn't set on context")
+		return nil
+	}
+	fromFederatorChan, ok := fromFederatorChanI.(chan gtsmodel.FromFederator)
+	if !ok {
+		l.Error("ACCEPT: from federator channel was set on context but couldn't be parsed")
+		return nil
+	}
+
+	inboxAcctI := ctx.Value(util.APAccount)
+	if inboxAcctI == nil {
+		l.Error("ACCEPT: inbox account wasn't set on context")
+		return nil
+	}
+	inboxAcct, ok := inboxAcctI.(*gtsmodel.Account)
+	if !ok {
+		l.Error("ACCEPT: inbox account was set on context but couldn't be parsed")
+		return nil
+	}
+
+	acceptObject := accept.GetActivityStreamsObject()
+	if acceptObject == nil {
+		return errors.New("ACCEPT: no object set on vocab.ActivityStreamsAccept")
+	}
+
+	for iter := acceptObject.Begin(); iter != acceptObject.End(); iter = iter.Next() {
+		switch iter.GetType().GetTypeName() {
+		case string(gtsmodel.ActivityStreamsFollow):
+			// ACCEPT FOLLOW
+			asFollow, ok := iter.GetType().(vocab.ActivityStreamsFollow)
+			if !ok {
+				return errors.New("ACCEPT: couldn't parse follow into vocab.ActivityStreamsFollow")
+			}
+			// convert the follow to something we can understand
+			gtsFollow, err := f.typeConverter.ASFollowToFollow(asFollow)
+			if err != nil {
+				return fmt.Errorf("ACCEPT: error converting asfollow to gtsfollow: %s", err)
+			}
+			// make sure the addressee of the original follow is the same as whatever inbox this landed in
+			if gtsFollow.AccountID != inboxAcct.ID {
+				return errors.New("ACCEPT: follow object account and inbox account were not the same")
+			}
+			follow, err := f.db.AcceptFollowRequest(gtsFollow.AccountID, gtsFollow.TargetAccountID)
+			if err != nil {
+				return err
+			}
+
+			fromFederatorChan <- gtsmodel.FromFederator{
+				APObjectType:     gtsmodel.ActivityStreamsFollow,
+				APActivityType:   gtsmodel.ActivityStreamsAccept,
+				GTSModel:         follow,
+				ReceivingAccount: inboxAcct,
+			}
+
+			return nil
+		}
+	}
+
+	return nil
+}