Announce/boost (#35)

Remote boosts incoming/outgoing now working.

7 files changed, 177 insertions, 3 deletions

diff --git a/internal/federation/federatingdb/announce.go b/internal/federation/federatingdb/announce.go
new file mode 100644
index 000000000..322a4838f
--- /dev/null
+++ b/internal/federation/federatingdb/announce.go
@@ -0,0 +1,73 @@
+package federatingdb
+
+import (
+	"context"
+	"encoding/json"
+	"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) Announce(ctx context.Context, announce vocab.ActivityStreamsAnnounce) error {
+	l := f.log.WithFields(
+		logrus.Fields{
+			"func": "Announce",
+		},
+	)
+	m, err := streams.Serialize(announce)
+	if err != nil {
+		return err
+	}
+	b, err := json.Marshal(m)
+	if err != nil {
+		return err
+	}
+
+	l.Debugf("received ANNOUNCE %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
+	}
+
+	boost, isNew, err := f.typeConverter.ASAnnounceToStatus(announce)
+	if err != nil {
+		return fmt.Errorf("Announce: error converting announce to boost: %s", err)
+	}
+
+	if !isNew {
+		// nothing to do here if this isn't a new announce
+		return nil
+	}
+
+	// it's a new announce so pass it back to the processor async for dereferencing etc
+	fromFederatorChan <- gtsmodel.FromFederator{
+		APObjectType:     gtsmodel.ActivityStreamsAnnounce,
+		APActivityType:   gtsmodel.ActivityStreamsCreate,
+		GTSModel:         boost,
+		ReceivingAccount: targetAcct,
+	}
+
+	return nil
+}
diff --git a/internal/federation/federatingdb/db.go b/internal/federation/federatingdb/db.go
index b5207fc34..f6587a1b7 100644
--- a/internal/federation/federatingdb/db.go
+++ b/internal/federation/federatingdb/db.go
@@ -35,6 +35,7 @@ type DB interface {
 	pub.Database
 	Undo(ctx context.Context, undo vocab.ActivityStreamsUndo) error
 	Accept(ctx context.Context, accept vocab.ActivityStreamsAccept) error
+	Announce(ctx context.Context, announce vocab.ActivityStreamsAnnounce) error
 }
 
 // FederatingDB uses the underlying DB interface to implement the go-fed pub.Database interface.
diff --git a/internal/federation/federating_db_test.go b/internal/federation/federatingdb/federating_db_test.go
index b4695b55b..f32314b10 100644
--- a/internal/federation/federating_db_test.go
+++ b/internal/federation/federatingdb/federating_db_test.go
@@ -16,6 +16,6 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-package federation
+package federatingdb_test
 
 // TODO: write tests for pgfed
diff --git a/internal/federation/federatingdb/util.go b/internal/federation/federatingdb/util.go
index be3cff944..53fe194a7 100644
--- a/internal/federation/federatingdb/util.go
+++ b/internal/federation/federatingdb/util.go
@@ -130,6 +130,19 @@ func (f *federatingDB) NewID(c context.Context, t vocab.Type) (id *url.URL, err
 				return idProp.GetIRI(), nil
 			}
 		}
+	case gtsmodel.ActivityStreamsAnnounce:
+		// ANNOUNCE aka BOOST
+		// ID might already be set on an announce we've created, so check it here and return it if it is
+		announce, ok := t.(vocab.ActivityStreamsAnnounce)
+		if !ok {
+			return nil, errors.New("newid: fave couldn't be parsed into vocab.ActivityStreamsAnnounce")
+		}
+		idProp := announce.GetJSONLDId()
+		if idProp != nil {
+			if idProp.IsIRI() {
+				return idProp.GetIRI(), nil
+			}
+		}
 	}
 
 	// fallback default behavior: just return a random UUID after our protocol and host
diff --git a/internal/federation/federatingprotocol.go b/internal/federation/federatingprotocol.go
index 39ed49cfb..e1c1ab184 100644
--- a/internal/federation/federatingprotocol.go
+++ b/internal/federation/federatingprotocol.go
@@ -257,6 +257,10 @@ func (f *federator) FederatingCallbacks(ctx context.Context) (wrapped pub.Federa
 		func(ctx context.Context, accept vocab.ActivityStreamsAccept) error {
 			return f.FederatingDB().Accept(ctx, accept)
 		},
+		// override default announce behavior and trigger our own side effects
+		func(ctx context.Context, announce vocab.ActivityStreamsAnnounce) error {
+			return f.FederatingDB().Announce(ctx, announce)
+		},
 	}
 
 	return
diff --git a/internal/federation/federator.go b/internal/federation/federator.go
index f2f223a65..149f68426 100644
--- a/internal/federation/federator.go
+++ b/internal/federation/federator.go
@@ -43,6 +43,9 @@ type Federator interface {
 	// DereferenceRemoteAccount can be used to get the representation of a remote account, based on the account ID (which is a URI).
 	// The given username will be used to create a transport for making outgoing requests. See the implementation for more detailed comments.
 	DereferenceRemoteAccount(username string, remoteAccountID *url.URL) (typeutils.Accountable, error)
+	// DereferenceRemoteStatus can be used to get the representation of a remote status, based on its ID (which is a URI).
+	// The given username will be used to create a transport for making outgoing requests. See the implementation for more detailed comments.
+	DereferenceRemoteStatus(username string, remoteStatusID *url.URL) (typeutils.Statusable, error)
 	// GetTransportForUser returns a new transport initialized with the key credentials belonging to the given username.
 	// This can be used for making signed http requests.
 	//
diff --git a/internal/federation/util.go b/internal/federation/util.go
index 837d92759..7be92e13d 100644
--- a/internal/federation/util.go
+++ b/internal/federation/util.go
@@ -258,6 +258,88 @@ func (f *federator) DereferenceRemoteAccount(username string, remoteAccountID *u
 	return nil, fmt.Errorf("type name %s not supported", t.GetTypeName())
 }
 
+func (f *federator) DereferenceRemoteStatus(username string, remoteStatusID *url.URL) (typeutils.Statusable, error) {
+	transport, err := f.GetTransportForUser(username)
+	if err != nil {
+		return nil, fmt.Errorf("transport err: %s", err)
+	}
+
+	b, err := transport.Dereference(context.Background(), remoteStatusID)
+	if err != nil {
+		return nil, fmt.Errorf("error deferencing %s: %s", remoteStatusID.String(), err)
+	}
+
+	m := make(map[string]interface{})
+	if err := json.Unmarshal(b, &m); err != nil {
+		return nil, fmt.Errorf("error unmarshalling bytes into json: %s", err)
+	}
+
+	t, err := streams.ToType(context.Background(), m)
+	if err != nil {
+		return nil, fmt.Errorf("error resolving json into ap vocab type: %s", err)
+	}
+
+	// Article, Document, Image, Video, Note, Page, Event, Place, Mention, Profile
+	switch t.GetTypeName() {
+	case gtsmodel.ActivityStreamsArticle:
+		p, ok := t.(vocab.ActivityStreamsArticle)
+		if !ok {
+			return nil, errors.New("error resolving type as ActivityStreamsArticle")
+		}
+		return p, nil
+	case gtsmodel.ActivityStreamsDocument:
+		p, ok := t.(vocab.ActivityStreamsDocument)
+		if !ok {
+			return nil, errors.New("error resolving type as ActivityStreamsDocument")
+		}
+		return p, nil
+	case gtsmodel.ActivityStreamsImage:
+		p, ok := t.(vocab.ActivityStreamsImage)
+		if !ok {
+			return nil, errors.New("error resolving type as ActivityStreamsImage")
+		}
+		return p, nil
+	case gtsmodel.ActivityStreamsVideo:
+		p, ok := t.(vocab.ActivityStreamsVideo)
+		if !ok {
+			return nil, errors.New("error resolving type as ActivityStreamsVideo")
+		}
+		return p, nil
+	case gtsmodel.ActivityStreamsNote:
+		p, ok := t.(vocab.ActivityStreamsNote)
+		if !ok {
+			return nil, errors.New("error resolving type as ActivityStreamsNote")
+		}
+		return p, nil
+	case gtsmodel.ActivityStreamsPage:
+		p, ok := t.(vocab.ActivityStreamsPage)
+		if !ok {
+			return nil, errors.New("error resolving type as ActivityStreamsPage")
+		}
+		return p, nil
+	case gtsmodel.ActivityStreamsEvent:
+		p, ok := t.(vocab.ActivityStreamsEvent)
+		if !ok {
+			return nil, errors.New("error resolving type as ActivityStreamsEvent")
+		}
+		return p, nil
+	case gtsmodel.ActivityStreamsPlace:
+		p, ok := t.(vocab.ActivityStreamsPlace)
+		if !ok {
+			return nil, errors.New("error resolving type as ActivityStreamsPlace")
+		}
+		return p, nil
+	case gtsmodel.ActivityStreamsProfile:
+		p, ok := t.(vocab.ActivityStreamsProfile)
+		if !ok {
+			return nil, errors.New("error resolving type as ActivityStreamsProfile")
+		}
+		return p, nil
+	}
+
+	return nil, fmt.Errorf("type name %s not supported", t.GetTypeName())
+}
+
 func (f *federator) GetTransportForUser(username string) (transport.Transport, error) {
 	// We need an account to use to create a transport for dereferecing the signature.
 	// If a username has been given, we can fetch the account with that username and use it.
@@ -279,5 +361,3 @@ func (f *federator) GetTransportForUser(username string) (transport.Transport, e
 	}
 	return transport, nil
 }
-
-