[feature] Add List functionality (#1802)

* start working on lists

* further list work

* test list db functions nicely

* more work on lists

* peepoopeepoo

* poke

* start list timeline func

* we're getting there lads

* couldn't be me working on stuff... could it?

* hook up handlers

* fiddling

* weeee

* woah

* screaming, pissing

* fix streaming being a whiny baby

* lint, small test fix, swagger

* tidying up, testing

* fucked! by the linter

* move timelines to state like a boss

* add timeline start to tests using state

* invalidate lists

1 files changed, 58 insertions, 0 deletions

diff --git a/internal/api/util/parsequery.go b/internal/api/util/parsequery.go
new file mode 100644
index 000000000..92578a739
--- /dev/null
+++ b/internal/api/util/parsequery.go
@@ -0,0 +1,58 @@
+// 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 util
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+)
+
+const (
+	LimitKey = "limit"
+	LocalKey = "local"
+)
+
+func ParseLimit(limit string, defaultLimit int) (int, gtserror.WithCode) {
+	if limit == "" {
+		return defaultLimit, nil
+	}
+
+	i, err := strconv.Atoi(limit)
+	if err != nil {
+		err := fmt.Errorf("error parsing %s: %w", LimitKey, err)
+		return 0, gtserror.NewErrorBadRequest(err, err.Error())
+	}
+
+	return i, nil
+}
+
+func ParseLocal(local string, defaultLocal bool) (bool, gtserror.WithCode) {
+	if local == "" {
+		return defaultLocal, nil
+	}
+
+	i, err := strconv.ParseBool(local)
+	if err != nil {
+		err := fmt.Errorf("error parsing %s: %w", LocalKey, err)
+		return false, gtserror.NewErrorBadRequest(err, err.Error())
+	}
+
+	return i, nil
+}