[NetworkManager-openvpn/th/support-proto: 1/2] properties: add setting_vpn_add_data_item_or_remove() helper

[Thomas Haller <thaller src gnome org>]

commit 279bcfb70b91bd46a124a07d8d6ed95b84ec6213
Author: Thomas Haller <thaller redhat com>
Date:   Fri Oct 23 15:55:30 2020 +0200

    properties: add setting_vpn_add_data_item_or_remove() helper

 properties/import-export.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
---
diff --git a/properties/import-export.c b/properties/import-export.c
index c1fe6db..a6478d9 100644
--- a/properties/import-export.c
+++ b/properties/import-export.c
@@ -124,6 +124,25 @@ setting_vpn_add_data_item (NMSettingVpn *setting,
        nm_setting_vpn_add_data_item (setting, key, value);
 }
 
+static void
+setting_vpn_add_data_item_or_remove (NMSettingVpn *setting,
+                                     const char *key,
+                                     const char *value)
+{
+       g_return_if_fail (NM_IS_SETTING_VPN (setting));
+       g_return_if_fail (key && key[0]);
+
+       if (!value) {
+               nm_setting_vpn_remove_data_item (setting, key);
+               return;
+       }
+
+       g_return_if_fail (value && value[0]);
+       g_return_if_fail (_is_utf8 (value));
+
+       nm_setting_vpn_add_data_item (setting, key, value);
+}
+
 static void
 setting_vpn_add_data_item_utf8safe (NMSettingVpn *setting,
                                     const char *key,