1 files changed, 62 insertions, 0 deletions
diff --git a/internal/visibility/boostable.go b/internal/visibility/boostable.go
new file mode 100644
index 000000000..7c8bda324
--- /dev/null
+++ b/internal/visibility/boostable.go
@@ -0,0 +1,62 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// 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 visibility
+
+import (
+	"context"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/log"
+)
+
+// StatusBoostable checks if given status is boostable by requester, checking boolean status visibility to requester and ultimately the AP status visibility setting.
+func (f *Filter) StatusBoostable(ctx context.Context, requester *gtsmodel.Account, status *gtsmodel.Status) (bool, error) {
+	if status.Visibility == gtsmodel.VisibilityDirect {
+		log.Trace(ctx, "direct statuses are not boostable")
+		return false, nil
+	}
+
+	// Check whether status is visible to requesting account.
+	visible, err := f.StatusVisible(ctx, requester, status)
+	if err != nil {
+		return false, err
+	}
+
+	if !visible {
+		log.Trace(ctx, "status not visible to requesting account")
+		return false, nil
+	}
+
+	if requester.ID == status.AccountID {
+		// Status author can always boost non-directs.
+		return true, nil
+	}
+
+	if status.Visibility == gtsmodel.VisibilityFollowersOnly ||
+		status.Visibility == gtsmodel.VisibilityMutualsOnly {
+		log.Trace(ctx, "unauthored %s status not boostable", status.Visibility)
+		return false, nil
+	}
+
+	if !*status.Boostable {
+		log.Trace(ctx, "status marked not boostable")
+		return false, nil
+	}
+
+	return true, nil
+}