Ap (#14)

Big restructuring and initial work on activitypub

internal/federation/federator.go

@@ -0,0 +1,79 @@
+/*
+   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 federation
+
+import (
+	"net/http"
+	"net/url"
+
+	"github.com/go-fed/activity/pub"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/transport"
+	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
+)
+
+// Federator wraps various interfaces and functions to manage activitypub federation from gotosocial
+type Federator interface {
+	// FederatingActor returns the underlying pub.FederatingActor, which can be used to send activities, and serve actors at inboxes/outboxes.
+	FederatingActor() pub.FederatingActor
+	// AuthenticateFederatedRequest can be used to check the authenticity of incoming http-signed requests for federating resources.
+	// The given username will be used to create a transport for making outgoing requests. See the implementation for more detailed comments.
+	AuthenticateFederatedRequest(username string, r *http.Request) (*url.URL, error)
+	// 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)
+	// GetTransportForUser returns a new transport initialized with the key credentials belonging to the given username.
+	// This can be used for making signed http requests.
+	GetTransportForUser(username string) (pub.Transport, error)
+	pub.CommonBehavior
+	pub.FederatingProtocol
+}
+
+type federator struct {
+	config              *config.Config
+	db                  db.DB
+	clock               pub.Clock
+	typeConverter       typeutils.TypeConverter
+	transportController transport.Controller
+	actor               pub.FederatingActor
+	log                 *logrus.Logger
+}
+
+// NewFederator returns a new federator
+func NewFederator(db db.DB, transportController transport.Controller, config *config.Config, log *logrus.Logger, typeConverter typeutils.TypeConverter) Federator {
+
+	clock := &Clock{}
+	f := &federator{
+		config:              config,
+		db:                  db,
+		clock:               &Clock{},
+		typeConverter:       typeConverter,
+		transportController: transportController,
+		log:                 log,
+	}
+	actor := newFederatingActor(f, f, db.Federation(), clock)
+	f.actor = actor
+	return f
+}
+
+func (f *federator) FederatingActor() pub.FederatingActor {
+	return f.actor
+}