Hardware interface for UI (#116)

* Init hardware object

* Update API

* Update hardware list

* fix api description

* fix lint

* add hardware to API

* fix lint

* fix wrong

* fix view

hassio/hardware.py

@@ -0,0 +1,87 @@
+"""Read hardware info from system."""
+import logging
+from pathlib import Path
+import re
+
+import pyudev
+
+from .const import ATTR_NAME, ATTR_TYPE, ATTR_DEVICES
+
+_LOGGER = logging.getLogger(__name__)
+
+ASOUND_CARDS = Path("/proc/asound/cards")
+RE_CARDS = re.compile(r"(\d+) \[(\w*) *\]: (.*\w)")
+
+ASOUND_DEVICES = Path("/proc/asound/devices")
+RE_DEVICES = re.compile(r"\[.*(\d+)- (\d+).*\]: ([\w ]*)")
+
+
+class Hardware(object):
+    """Represent a interface to procfs, sysfs and udev."""
+
+    def __init__(self):
+        """Init hardware object."""
+        self.context = pyudev.Context()
+
+    @property
+    def serial_devices(self):
+        """Return all serial and connected devices."""
+        dev_list = set()
+        for device in self.context.list_devices(subsystem='tty'):
+            if 'ID_VENDOR' in device:
+                dev_list.add(device.device_node)
+
+        return list(dev_list)
+
+    @property
+    def input_devices(self):
+        """Return all input devices."""
+        dev_list = set()
+        for device in self.context.list_devices(subsystem='input'):
+            if 'NAME' in device:
+                dev_list.add(device['NAME'].replace('"', ''))
+
+        return list(dev_list)
+
+    @property
+    def disk_devices(self):
+        """Return all disk devices."""
+        dev_list = set()
+        for device in self.context.list_devices(subsystem='block'):
+            if 'ID_VENDOR' in device:
+                dev_list.add(device.device_node)
+
+        return list(dev_list)
+
+    @property
+    def audio_devices(self):
+        """Return all available audio interfaces."""
+        try:
+            with ASOUND_CARDS.open('r') as cards_file:
+                cards = cards_file.read()
+            with ASOUND_DEVICES.open('r') as devices_file:
+                devices = devices_file.read()
+        except OSError as err:
+            _LOGGER.error("Can't read asound data -> %s", err)
+            return
+
+        audio_list = {}
+
+        # parse cards
+        for match in RE_CARDS.finditer(cards):
+            audio_list[match.group(1)] = {
+                ATTR_NAME: match.group(3),
+                ATTR_TYPE: match.group(2),
+                ATTR_DEVICES: {},
+            }
+
+        # parse devices
+        for match in RE_DEVICES.finditer(devices):
+            try:
+                audio_list[match.group(1)][ATTR_DEVICES][match.group(2)] = \
+                    match.group(3)
+            except KeyError:
+                _LOGGER.warning("Wrong audio device found %s", match.group(0))
+                continue
+
+        return audio_list