[chore] add IPPrefixes type so we don't need separate rate limit parsed field (#3982)

* add IPPrefixes type so we don't need separate rate limit parsed field

* sshhhh please linter, mommy's working

1 files changed, 62 insertions, 0 deletions

diff --git a/internal/config/types.go b/internal/config/types.go
new file mode 100644
index 000000000..c2296975f
--- /dev/null
+++ b/internal/config/types.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 config
+
+import (
+	"net/netip"
+
+	"codeberg.org/gruf/go-byteutil"
+)
+
+// IPPrefixes is a type-alias for []netip.Prefix
+// to allow parsing by CLI "flag"-like utilities.
+type IPPrefixes []netip.Prefix
+
+func (p *IPPrefixes) Set(in string) error {
+	prefix, err := netip.ParsePrefix(in)
+	if err != nil {
+		return err
+	}
+	(*p) = append((*p), prefix)
+	return nil
+}
+
+func (p *IPPrefixes) String() string {
+	if p == nil || len(*p) == 0 {
+		return ""
+	}
+	var buf byteutil.Buffer
+	for _, prefix := range *p {
+		str := prefix.String()
+		buf.B = append(buf.B, str...)
+		buf.B = append(buf.B, ',')
+	}
+	buf.Truncate(1)
+	return buf.String()
+}
+
+func (p *IPPrefixes) Strings() []string {
+	if p == nil || len(*p) == 0 {
+		return nil
+	}
+	strs := make([]string, len(*p))
+	for i, prefix := range *p {
+		strs[i] = prefix.String()
+	}
+	return strs
+}