[#285] Removed old covid19 backend.

Those endpoints aren't even working anymore.

Closes: #285

docs/source/backends.rst

@@ -13,7 +13,6 @@ Backends
     platypush/backend/button.flic.rst
     platypush/backend/camera.pi.rst
     platypush/backend/chat.telegram.rst
-    platypush/backend/covid19.rst
     platypush/backend/file.monitor.rst
     platypush/backend/foursquare.rst
     platypush/backend/github.rst

docs/source/platypush/backend/covid19.rst

@@ -1,5 +0,0 @@
-``covid19``
-=============================
-
-.. automodule:: platypush.backend.covid19
-    :members:

platypush/backend/covid19/__init__.py

@@ -1,137 +0,0 @@
-import datetime
-import os
-from typing import Optional, Union, List, Dict, Any
-
-from sqlalchemy import create_engine, Column, Integer, String, DateTime
-from sqlalchemy.orm import sessionmaker, scoped_session
-
-from platypush.backend import Backend
-from platypush.common.db import declarative_base
-from platypush.config import Config
-from platypush.context import get_plugin
-from platypush.message.event.covid19 import Covid19UpdateEvent
-from platypush.plugins.covid19 import Covid19Plugin
-
-Base = declarative_base()
-Session = scoped_session(sessionmaker())
-
-
-class Covid19Update(Base):
-    """Models the Covid19Data table"""
-
-    __tablename__ = 'covid19data'
-    __table_args__ = {'sqlite_autoincrement': True}
-
-    country = Column(String, primary_key=True)
-    confirmed = Column(Integer, nullable=False, default=0)
-    deaths = Column(Integer, nullable=False, default=0)
-    recovered = Column(Integer, nullable=False, default=0)
-    last_updated_at = Column(DateTime, nullable=False, default=datetime.datetime.utcnow)
-
-
-class Covid19Backend(Backend):
-    """
-    This backend polls new data about the Covid-19 pandemic diffusion and triggers events when new data is available.
-
-    Triggers:
-
-        - :class:`platypush.message.event.covid19.Covid19UpdateEvent` when new data is available.
-
-    """
-
-    # noinspection PyProtectedMember
-    def __init__(
-        self,
-        country: Optional[Union[str, List[str]]],
-        poll_seconds: Optional[float] = 3600.0,
-        **kwargs
-    ):
-        """
-        :param country: Default country (or list of countries) to retrieve the stats for. It can either be the full
-            country name or the country code. Special values:
-
-            - ``world``: Get worldwide stats.
-            - ``all``: Get all the available stats.
-
-        Default: either the default configured on the :class:`platypush.plugins.covid19.Covid19Plugin` plugin or
-        ``world``.
-
-        :param poll_seconds: How often the backend should check for new check-ins (default: one hour).
-        """
-        super().__init__(poll_seconds=poll_seconds, **kwargs)
-        self._plugin: Covid19Plugin = get_plugin('covid19')
-        self.country: List[str] = self._plugin._get_countries(country)
-        self.workdir = os.path.join(
-            os.path.expanduser(Config.get('workdir')), 'covid19'
-        )
-        self.dbfile = os.path.join(self.workdir, 'data.db')
-        os.makedirs(self.workdir, exist_ok=True)
-
-    def __enter__(self):
-        self.logger.info('Started Covid19 backend')
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        self.logger.info('Stopped Covid19 backend')
-
-    def _process_update(self, summary: Dict[str, Any], session: Session):
-        update_time = datetime.datetime.fromisoformat(
-            summary['Date'].replace('Z', '+00:00')
-        )
-
-        self.bus.post(
-            Covid19UpdateEvent(
-                country=summary['Country'],
-                country_code=summary['CountryCode'],
-                confirmed=summary['TotalConfirmed'],
-                deaths=summary['TotalDeaths'],
-                recovered=summary['TotalRecovered'],
-                update_time=update_time,
-            )
-        )
-
-        session.merge(
-            Covid19Update(
-                country=summary['CountryCode'],
-                confirmed=summary['TotalConfirmed'],
-                deaths=summary['TotalDeaths'],
-                recovered=summary['TotalRecovered'],
-                last_updated_at=update_time,
-            )
-        )
-
-    def loop(self):
-        # noinspection PyUnresolvedReferences
-        summaries = self._plugin.summary(self.country).output
-        if not summaries:
-            return
-
-        engine = create_engine(
-            'sqlite:///{}'.format(self.dbfile),
-            connect_args={'check_same_thread': False},
-        )
-        Base.metadata.create_all(engine)
-        Session.configure(bind=engine)
-        session = Session()
-
-        last_records = {
-            record.country: record
-            for record in session.query(Covid19Update)
-            .filter(Covid19Update.country.in_(self.country))
-            .all()
-        }
-
-        for summary in summaries:
-            country = summary['CountryCode']
-            last_record = last_records.get(country)
-            if (
-                not last_record
-                or summary['TotalConfirmed'] != last_record.confirmed
-                or summary['TotalDeaths'] != last_record.deaths
-                or summary['TotalRecovered'] != last_record.recovered
-            ):
-                self._process_update(summary=summary, session=session)
-
-        session.commit()
-
-
-# vim:sw=4:ts=4:et:

platypush/backend/covid19/manifest.yaml

@@ -1,7 +0,0 @@
-manifest:
-  events:
-    platypush.message.event.covid19.Covid19UpdateEvent: when new data is available.
-  install:
-    pip: []
-  package: platypush.backend.covid19
-  type: backend