Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/api4/helpers.go

@@ -0,0 +1,25 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package api4
+
+import (
+	"net/url"
+	"strconv"
+
+	"github.com/pkg/errors"
+)
+
+func parseInt(u *url.URL, name string, defaultValue int) (int, error) {
+	valueStr := u.Query().Get(name)
+	if valueStr == "" {
+		return defaultValue, nil
+	}
+
+	value, err := strconv.Atoi(valueStr)
+	if err != nil {
+		return 0, errors.Wrapf(err, "failed to parse %s as integer", name)
+	}
+
+	return value, nil
+}