[core] restructure to allow PIP packaging

OK - so I have to admit I *hate* the fact that PIP seems to require a
subdirectory named like the library.

But since the PIP package is something really nifty to have (thanks to
@tony again!!!), I updated the codebase to hopefully conform with what
PIP expects. Testruns so far look promising...

bumblebee_status/modules/contrib/bluetooth2.py

@@ -0,0 +1,103 @@
+"""Displays bluetooth status. Left mouse click launches manager app,
+right click toggles bluetooth. Needs dbus-send to toggle bluetooth state and
+python-dbus to count the number of connections
+
+Parameters:
+    * bluetooth.manager : application to launch on click (blueman-manager)
+
+contributed by `martindoublem <https://github.com/martindoublem>`_ - many thanks!
+"""
+
+
+import os
+import re
+import subprocess
+import dbus
+import dbus.mainloop.glib
+import logging
+
+import core.module
+import core.widget
+import core.input
+
+import util.cli
+
+
+class Module(core.module.Module):
+    def __init__(self, config, theme):
+        super().__init__(config, theme, core.widget.Widget(self.status))
+
+        self.manager = self.parameter("manager", "blueman-manager")
+        self._status = "Off"
+        dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
+        self._bus = dbus.SystemBus()
+
+        core.input.register(self, button=core.input.LEFT_MOUSE, cmd=self.manager)
+        core.input.register(self, button=core.input.RIGHT_MOUSE, cmd=self._toggle)
+
+    def status(self, widget):
+        """Get status."""
+        return self._status
+
+    def update(self):
+        """Update current state."""
+        state = len(
+            subprocess.run(["bluetoothctl", "list"], stdout=subprocess.PIPE).stdout
+        )
+        if state > 0:
+            connected_devices = self.get_connected_devices()
+            self._status = "On - {}".format(connected_devices)
+        else:
+            self._status = "Off"
+            adapters_cmd = "rfkill list | grep Bluetooth"
+            if not len(
+                subprocess.run(adapters_cmd, shell=True, stdout=subprocess.PIPE).stdout
+            ):
+                self._status = "No Adapter Found"
+        return
+
+    def _toggle(self, widget=None):
+        """Toggle bluetooth state."""
+        if "On" in self._status:
+            state = "false"
+        else:
+            state = "true"
+
+        cmd = (
+            "dbus-send --system --print-reply --dest=org.blueman.Mechanism /org/blueman/mechanism org.blueman.Mechanism.SetRfkillState boolean:%s"
+            % state
+        )
+
+        logging.debug("bt: toggling bluetooth")
+        core.util.execute(cmd)
+
+    def state(self, widget):
+        """Get current state."""
+        state = []
+
+        if self._status == "No Adapter Found":
+            state.append("critical")
+        elif self._status == "On - 0":
+            state.append("warning")
+        elif "On" in self._status and not (self._status == "On - 0"):
+            state.append("ON")
+        else:
+            state.append("critical")
+        return state
+
+    def get_connected_devices(self):
+        devices = 0
+        objects = dbus.Interface(
+            self._bus.get_object("org.bluez", "/"), "org.freedesktop.DBus.ObjectManager"
+        ).GetManagedObjects()
+        for path, interfaces in objects.items():
+            if "org.bluez.Device1" in interfaces:
+                if dbus.Interface(
+                    self._bus.get_object("org.bluez", path),
+                    "org.freedesktop.DBus.Properties",
+                ).Get("org.bluez.Device1", "Connected"):
+                    devices += 1
+        return devices
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4