Xiaomi Cameras - multiple models (#14244)

* Added support for Xiaofang Camera

* Added entry for Xiaofang 1080p camera

* Code fix

* Minor comment fix

* Updated coveragerc for Xiaomi cameras

* Added Xiaomi Camera

Added Xiaomi Camera to accommodate multiple models like Yi, Xiaofang, etc.

* Minor code fix

* Minor code fix

* Added model property

* Update xiaomi.py

* Minor code fix

* Update xiaomi.py

* Update xiaomi.py

* Minor code fix

* Package requirement fix due to Version conflict

* To fix conflicts

* Update package_constraints.txt

* Minor fix

* Update xiaomi.py

* Update xiaomi.py

Changes made per comment

* Update xiaomi.py

* Don't update on add.

.coveragerc

@@ -376,6 +376,7 @@ omit =
     homeassistant/components/camera/rpi_camera.py
     homeassistant/components/camera/synology.py
     homeassistant/components/camera/xeoma.py
+    homeassistant/components/camera/xiaomi.py
     homeassistant/components/camera/yi.py
     homeassistant/components/climate/econet.py
     homeassistant/components/climate/ephember.py

homeassistant/components/camera/xiaomi.py

+"""
+This component provides support for Xiaomi Cameras.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/camera.xiaomi/
+"""
+import asyncio
+import logging
+
+import voluptuous as vol
+
+from homeassistant.components.camera import Camera, PLATFORM_SCHEMA
+from homeassistant.components.ffmpeg import DATA_FFMPEG
+from homeassistant.const import (CONF_HOST, CONF_NAME, CONF_PATH,
+                                 CONF_PASSWORD, CONF_PORT, CONF_USERNAME)
+from homeassistant.helpers import config_validation as cv
+from homeassistant.helpers.aiohttp_client import async_aiohttp_proxy_stream
+
+DEPENDENCIES = ['ffmpeg']
+_LOGGER = logging.getLogger(__name__)
+
+DEFAULT_BRAND = 'Xiaomi Home Camera'
+DEFAULT_PATH = '/media/mmcblk0p1/record'
+DEFAULT_PORT = 21
+DEFAULT_USERNAME = 'root'
+
+CONF_FFMPEG_ARGUMENTS = 'ffmpeg_arguments'
+CONF_MODEL = 'model'
+
+MODEL_YI = 'yi'
+MODEL_XIAOFANG = 'xiaofang'
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
+    vol.Required(CONF_NAME): cv.string,
+    vol.Required(CONF_HOST): cv.string,
+    vol.Required(CONF_MODEL): vol.Any(MODEL_YI,
+                                      MODEL_XIAOFANG),
+    vol.Optional(CONF_PORT, default=DEFAULT_PORT): cv.string,
+    vol.Optional(CONF_PATH, default=DEFAULT_PATH): cv.string,
+    vol.Optional(CONF_USERNAME, default=DEFAULT_USERNAME): cv.string,
+    vol.Required(CONF_PASSWORD): cv.string,
+    vol.Optional(CONF_FFMPEG_ARGUMENTS): cv.string
+})
+
+
+async def async_setup_platform(hass,
+                               config,
+                               async_add_devices,
+                               discovery_info=None):
+    """Set up a Xiaomi Camera."""
+    _LOGGER.debug('Received configuration for model %s', config[CONF_MODEL])
+    async_add_devices([XiaomiCamera(hass, config)])
+
+
+class XiaomiCamera(Camera):
+    """Define an implementation of a Xiaomi Camera."""
+
+    def __init__(self, hass, config):
+        """Initialize."""
+        super().__init__()
+        self._extra_arguments = config.get(CONF_FFMPEG_ARGUMENTS)
+        self._last_image = None
+        self._last_url = None
+        self._manager = hass.data[DATA_FFMPEG]
+        self._name = config[CONF_NAME]
+        self.host = config[CONF_HOST]
+        self._model = config[CONF_MODEL]
+        self.port = config[CONF_PORT]
+        self.path = config[CONF_PATH]
+        self.user = config[CONF_USERNAME]
+        self.passwd = config[CONF_PASSWORD]
+
+    @property
+    def name(self):
+        """Return the name of this camera."""
+        return self._name
+
+    @property
+    def brand(self):
+        """Return the camera brand."""
+        return DEFAULT_BRAND
+
+    @property
+    def model(self):
+        """Return the camera model."""
+        return self._model
+
+    def get_latest_video_url(self):
+        """Retrieve the latest video file from the Xiaomi Camera FTP server."""
+        from ftplib import FTP, error_perm
+
+        ftp = FTP(self.host)
+        try:
+            ftp.login(self.user, self.passwd)
+        except error_perm as exc:
+            _LOGGER.error('Camera login failed: %s', exc)
+            return False
+
+        try:
+            ftp.cwd(self.path)
+        except error_perm as exc:
+            _LOGGER.error('Unable to find path: %s - %s', self.path, exc)
+            return False
+
+        dirs = [d for d in ftp.nlst() if '.' not in d]
+        if not dirs:
+            if self._model == MODEL_YI:
+                _LOGGER.warning("There don't appear to be any uploaded videos")
+                return False
+            elif self._model == MODEL_XIAOFANG:
+                _LOGGER.warning("There don't appear to be any folders")
+                return False
+
+            first_dir = dirs[-1]
+            try:
+                ftp.cwd(first_dir)
+            except error_perm as exc:
+                _LOGGER.error('Unable to find path: %s - %s', first_dir, exc)
+                return False
+
+            dirs = [d for d in ftp.nlst() if '.' not in d]
+            if not dirs:
+                _LOGGER.warning("There don't appear to be any uploaded videos")
+                return False
+
+        latest_dir = dirs[-1]
+        ftp.cwd(latest_dir)
+        videos = [v for v in ftp.nlst() if '.tmp' not in v]
+        if not videos:
+            _LOGGER.info('Video folder "%s" is empty; delaying', latest_dir)
+            return False
+
+        if self._model == MODEL_XIAOFANG:
+            video = videos[-2]
+        else:
+            video = videos[-1]
+
+        return 'ftp://{0}:{1}@{2}:{3}{4}/{5}'.format(
+            self.user, self.passwd, self.host, self.port, ftp.pwd(), video)
+
+    async def async_camera_image(self):
+        """Return a still image response from the camera."""
+        from haffmpeg import ImageFrame, IMAGE_JPEG
+
+        url = await self.hass.async_add_job(self.get_latest_video_url)
+        if url != self._last_url:
+            ffmpeg = ImageFrame(self._manager.binary, loop=self.hass.loop)
+            self._last_image = await asyncio.shield(ffmpeg.get_image(
+                url, output_format=IMAGE_JPEG,
+                extra_cmd=self._extra_arguments), loop=self.hass.loop)
+            self._last_url = url
+
+        return self._last_image
+
+    async def handle_async_mjpeg_stream(self, request):
+        """Generate an HTTP MJPEG stream from the camera."""
+        from haffmpeg import CameraMjpeg
+
+        stream = CameraMjpeg(self._manager.binary, loop=self.hass.loop)
+        await stream.open_camera(
+            self._last_url, extra_cmd=self._extra_arguments)
+
+        await async_aiohttp_proxy_stream(
+            self.hass, request, stream,
+            'multipart/x-mixed-replace;boundary=ffserver')
+        await stream.close()