1 files changed, 65 insertions, 0 deletions
diff --git a/internal/federation/dereferencing/announce.go b/internal/federation/dereferencing/announce.go
new file mode 100644
index 000000000..2522a4034
--- /dev/null
+++ b/internal/federation/dereferencing/announce.go
@@ -0,0 +1,65 @@
+/*
+   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 dereferencing
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (d *deref) DereferenceAnnounce(announce *gtsmodel.Status, requestingUsername string) error {
+	if announce.GTSBoostedStatus == nil || announce.GTSBoostedStatus.URI == "" {
+		// we can't do anything unfortunately
+		return errors.New("DereferenceAnnounce: no URI to dereference")
+	}
+
+	boostedStatusURI, err := url.Parse(announce.GTSBoostedStatus.URI)
+	if err != nil {
+		return fmt.Errorf("DereferenceAnnounce: couldn't parse boosted status URI %s: %s", announce.GTSBoostedStatus.URI, err)
+	}
+	if blocked, err := d.blockedDomain(boostedStatusURI.Host); blocked || err != nil {
+		return fmt.Errorf("DereferenceAnnounce: domain %s is blocked", boostedStatusURI.Host)
+	}
+
+	// dereference statuses in the thread of the boosted status
+	if err := d.DereferenceThread(requestingUsername, boostedStatusURI); err != nil {
+		return fmt.Errorf("DereferenceAnnounce: error dereferencing thread of boosted status: %s", err)
+	}
+
+	boostedStatus, _, _, err := d.GetRemoteStatus(requestingUsername, boostedStatusURI, false)
+	if err != nil {
+		return fmt.Errorf("DereferenceAnnounce: error dereferencing remote status with id %s: %s", announce.GTSBoostedStatus.URI, err)
+	}
+
+	announce.Content = boostedStatus.Content
+	announce.ContentWarning = boostedStatus.ContentWarning
+	announce.ActivityStreamsType = boostedStatus.ActivityStreamsType
+	announce.Sensitive = boostedStatus.Sensitive
+	announce.Language = boostedStatus.Language
+	announce.Text = boostedStatus.Text
+	announce.BoostOfID = boostedStatus.ID
+	announce.BoostOfAccountID = boostedStatus.AccountID
+	announce.Visibility = boostedStatus.Visibility
+	announce.VisibilityAdvanced = boostedStatus.VisibilityAdvanced
+	announce.GTSBoostedStatus = boostedStatus
+	return nil
+}