fix: Network.get_device #6

Author: Aylur

docs/libraries/network.md

@@ -9,15 +9,15 @@ Wrapper library over [networkmanager](https://networkmanager.dev/) to better int
 :::code-group
 
 ```sh [<i class="devicon-archlinux-plain"></i> Arch]
-sudo pacman -Syu meson vala networkmanager gobject-introspection
+sudo pacman -Syu meson vala libnm gobject-introspection
 ```
 
 ```sh [<i class="devicon-fedora-plain"></i> Fedora]
-sudo dnf install meson gcc valac NetworkManager gobject-introspection-devel
+sudo dnf install meson gcc valac NetworkManager-libnm-devel gobject-introspection-devel
 ```
 
 ```sh [<i class="devicon-ubuntu-plain"></i> Ubuntu]
-sudo apt install meson valac network-manager-dev gobject-introspection
+sudo apt install meson valac libnm-dev gobject-introspection
 ```
 
 :::

lib/network/network.vala

@@ -49,7 +49,7 @@ public class AstalNetwork.Network : Object {
         }
     }
 
-    private NM.Device get_device(NM.DeviceType t) {
+    private NM.Device? get_device(NM.DeviceType t) {
         var valid = new GenericArray<NM.Device>();
         foreach (var device in client.get_devices()) {
             if (device.device_type == t)
@@ -61,7 +61,10 @@ public class AstalNetwork.Network : Object {
                 return device;
         }
 
-        return valid.get(0);
+        if (valid.length > 0)
+            return valid.get(0);
+
+        return null;
     }
 
     private void sync() {