148 lines
4.6 KiB
Python
148 lines
4.6 KiB
Python
"""
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Parse prices of a device from geizhals.
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For more details about this platform, please refer to the documentation at
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https://home-assistant.io/components/sensor.geizhals/
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"""
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import logging
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from datetime import timedelta
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import voluptuous as vol
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from homeassistant.components.sensor import PLATFORM_SCHEMA
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import homeassistant.helpers.config_validation as cv
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from homeassistant.util import Throttle
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from homeassistant.helpers.entity import Entity
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from homeassistant.const import (CONF_DOMAIN, CONF_NAME)
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REQUIREMENTS = ['beautifulsoup4==4.6.0']
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_LOGGER = logging.getLogger(__name__)
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CONF_PRODUCT_ID = 'product_id'
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CONF_DESCRIPTION = 'description'
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CONF_REGEX = 'regex'
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ICON = 'mdi:coin'
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MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=120)
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
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vol.Required(CONF_NAME): cv.string,
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vol.Required(CONF_PRODUCT_ID): cv.positive_int,
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vol.Optional(CONF_DESCRIPTION, default='Price'): cv.string,
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vol.Optional(CONF_DOMAIN, default='geizhals.de'): vol.In(
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['geizhals.at',
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'geizhals.eu',
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'geizhals.de',
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'skinflint.co.uk',
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'cenowarka.pl']),
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vol.Optional(CONF_REGEX, default=r'\D\s(\d*)[\,|\.](\d*)'): cv.string,
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})
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def setup_platform(hass, config, add_devices, discovery_info=None):
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"""Set up the Geizwatch sensor."""
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name = config.get(CONF_NAME)
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description = config.get(CONF_DESCRIPTION)
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product_id = config.get(CONF_PRODUCT_ID)
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domain = config.get(CONF_DOMAIN)
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regex = config.get(CONF_REGEX)
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add_devices([Geizwatch(name, description, product_id, domain, regex)],
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True)
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class Geizwatch(Entity):
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"""Implementation of Geizwatch."""
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def __init__(self, name, description, product_id, domain,
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regex):
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"""Initialize the sensor."""
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self._name = name
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self.description = description
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self.data = GeizParser(product_id, domain, regex)
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self._state = None
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@property
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def name(self):
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"""Return the name of the sensor."""
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return self._name
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@property
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def icon(self):
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"""Return the icon for the frontend."""
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return ICON
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@property
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def state(self):
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"""Return the best price of the selected product."""
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return self._state
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@property
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def device_state_attributes(self):
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"""Return the state attributes."""
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while len(self.data.prices) < 4:
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self.data.prices.append("None")
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attrs = {'device_name': self.data.device_name,
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'description': self.description,
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'unit_of_measurement': self.data.unit_of_measurement,
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'product_id': self.data.product_id,
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'price1': self.data.prices[0],
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'price2': self.data.prices[1],
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'price3': self.data.prices[2],
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'price4': self.data.prices[3]}
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return attrs
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def update(self):
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"""Get the latest price from geizhals and updates the state."""
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self.data.update()
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self._state = self.data.prices[0]
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class GeizParser(object):
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"""Pull data from the geizhals website."""
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def __init__(self, product_id, domain, regex):
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"""Initialize the sensor."""
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# parse input arguments
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self.product_id = product_id
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self.domain = domain
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self.regex = regex
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# set some empty default values
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self.device_name = ''
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self.prices = [None, None, None, None]
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self.unit_of_measurement = ''
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@Throttle(MIN_TIME_BETWEEN_UPDATES)
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def update(self):
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"""Update the device prices."""
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import bs4
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import requests
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import re
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sess = requests.session()
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request = sess.get('https://{}/{}'.format(self.domain,
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self.product_id),
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allow_redirects=True,
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timeout=1)
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soup = bs4.BeautifulSoup(request.text, 'html.parser')
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# parse name
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raw = soup.find_all('span', attrs={'itemprop': 'name'})
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self.device_name = raw[1].string
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# parse prices
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prices = []
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for tmp in soup.find_all('span', attrs={'class': 'gh_price'}):
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matches = re.search(self.regex, tmp.string)
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raw = '{}.{}'.format(matches.group(1),
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matches.group(2))
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prices += [float(raw)]
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prices.sort()
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self.prices = prices[1:]
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# parse unit
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price_match = soup.find('span', attrs={'class': 'gh_price'})
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matches = re.search(r'€|£|PLN', price_match.string)
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self.unit_of_measurement = matches.group()
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