1 files changed, 59 insertions, 0 deletions
diff --git a/internal/cache/timeline/timeline.go b/internal/cache/timeline/timeline.go
new file mode 100644
index 000000000..4f8797e82
--- /dev/null
+++ b/internal/cache/timeline/timeline.go
@@ -0,0 +1,59 @@
+// 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 timeline
+
+import (
+	"time"
+
+	"codeberg.org/gruf/go-structr"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+	"github.com/superseriousbusiness/gotosocial/internal/paging"
+)
+
+// plus1hULID returns a ULID for now+1h.
+func plus1hULID() string {
+	t := time.Now().Add(time.Hour)
+	return id.NewULIDFromTime(t)
+}
+
+// nextPageParams gets the next set of paging
+// parameters to use based on the current set,
+// and the next set of lo / hi values. This will
+// correctly handle making sure that, depending
+// on the paging order, the cursor value gets
+// updated while maintaining the boundary value.
+func nextPageParams(
+	page *paging.Page,
+	lastIdx string,
+	order paging.Order,
+) {
+	if order.Ascending() {
+		page.Min.Value = lastIdx
+	} else /* i.e. descending */ { //nolint:revive
+		page.Max.Value = lastIdx
+	}
+}
+
+// toDirection converts page order to timeline direction.
+func toDirection(order paging.Order) structr.Direction {
+	if order.Ascending() {
+		return structr.Asc
+	} else /* i.e. descending */ { //nolint:revive
+		return structr.Desc
+	}
+}