added vpn module

* shows current VPN connection
* allows to establish a VPN connection

bumblebee/modules/vpn.py

@@ -0,0 +1,90 @@
+# pylint: disable=C0111,R0903
+
+""" Displays the VPN profile that is currently in use.
+
+    Left click opens a popup menu that lists all available VPN profiles and allows to establish
+    a VPN connection using that profile.
+
+    Prerequisites:
+         * nmcli needs to be installed and configured properly.
+           To quickly test, whether nmcli is working correctly, type "nmcli -g NAME,TYPE,DEVICE con" which
+           lists all the connection profiles that are configured. Make sure that your VPN profile is in that list!
+
+           e.g: to import a openvpn profile via nmcli:
+               sudo nmcli connection import type openvpn file </path/to/your/openvpn/profile.ovpn>
+"""
+
+import logging
+import bumblebee.input
+import bumblebee.output
+import bumblebee.engine
+import functools
+
+class Module(bumblebee.engine.Module):
+    def __init__(self, engine, config):
+        super(Module, self).__init__(engine, config,
+            bumblebee.output.Widget(full_text=self.vpn_status)
+        )
+
+        self._connected_vpn_profile = None
+        self._selected_vpn_profile = None
+
+        res = bumblebee.util.execute("nmcli -g NAME,TYPE c")
+        lines = res.splitlines()
+
+        self._vpn_profiles = []
+        for line in lines:
+            info = line.split(':')
+            if info[1] == "vpn":
+                self._vpn_profiles.append(info[0])
+
+        engine.input.register_callback(self, button=bumblebee.input.LEFT_MOUSE,
+                                       cmd=self.popup)
+
+    def update(self, widgets):
+        try:
+            res = bumblebee.util.execute("nmcli -g NAME,TYPE,DEVICE con")
+            lines = res.splitlines()
+            self._connected_vpn_profile = None
+            for line in lines:
+                info = line.split(':')
+                if info[1] == "vpn" and info[2] != "":
+                    self._connected_vpn_profile = info[0]
+
+        except Exception as e:
+            logging.exception("Couldn't get VPN status")
+            self._connected_vpn_profile = None
+
+    def vpn_status(self, widget):
+        if self._connected_vpn_profile is None:
+            return "off"
+        return self._connected_vpn_profile
+
+    def _on_vpn_disconnect(self):
+        try:
+            bumblebee.util.execute("nmcli c down " + self._connected_vpn_profile)
+            self._connected_vpn_profile = None
+        except Exception as e:
+            logging.exception("Couldn't disconnect VPN connection")
+
+    def _on_vpn_connect(self, name):
+        self._selected_vpn_profile = name
+
+        try:
+            bumblebee.util.execute("nmcli c up " + self._selected_vpn_profile)
+            self._connected_vpn_profile = name
+        except Exception as e:
+            logging.exception("Couldn't establish VPN connection")
+            self._connected_vpn_profile = None
+
+    def popup(self, widget):
+        menu = bumblebee.popup_v2.PopupMenu()
+
+        if self._connected_vpn_profile is not None:
+            menu.add_menuitem("Off", callback=self._on_vpn_disconnect)
+        for vpn_profile in self._vpn_profiles:
+            menu.add_menuitem(vpn_profile, callback=functools.partial(self._on_vpn_connect, vpn_profile))
+        menu.show(widget)
+
+    def state(self, widget):
+        return []

themes/icons/awesome-fonts.json

@@ -196,5 +196,8 @@
     "pihole": { 
       "enabled": { "prefix": "" },
       "disabled": { "prefix": "" }
+    },
+    "vpn": {
+        "prefix": ""
     }
 }