Great migration notify (#22406)

* Move notify platforms into components

* Move notify tests

* Fix notify tests

* More fixes

* Update requirements

* Update .coveragerc

* Run gen reqs

homeassistant/components/file/notify.py

@@ -0,0 +1,59 @@
+"""
+Support for file notification.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/notify.file/
+"""
+import logging
+import os
+
+import voluptuous as vol
+
+from homeassistant.const import CONF_FILENAME
+import homeassistant.helpers.config_validation as cv
+import homeassistant.util.dt as dt_util
+
+from homeassistant.components.notify import (
+    ATTR_TITLE, ATTR_TITLE_DEFAULT, PLATFORM_SCHEMA, BaseNotificationService)
+
+CONF_TIMESTAMP = 'timestamp'
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
+    vol.Required(CONF_FILENAME): cv.string,
+    vol.Optional(CONF_TIMESTAMP, default=False): cv.boolean,
+})
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def get_service(hass, config, discovery_info=None):
+    """Get the file notification service."""
+    filename = config[CONF_FILENAME]
+    timestamp = config[CONF_TIMESTAMP]
+
+    return FileNotificationService(hass, filename, timestamp)
+
+
+class FileNotificationService(BaseNotificationService):
+    """Implement the notification service for the File service."""
+
+    def __init__(self, hass, filename, add_timestamp):
+        """Initialize the service."""
+        self.filepath = os.path.join(hass.config.config_dir, filename)
+        self.add_timestamp = add_timestamp
+
+    def send_message(self, message="", **kwargs):
+        """Send a message to a file."""
+        with open(self.filepath, 'a') as file:
+            if os.stat(self.filepath).st_size == 0:
+                title = '{} notifications (Log started: {})\n{}\n'.format(
+                    kwargs.get(ATTR_TITLE, ATTR_TITLE_DEFAULT),
+                    dt_util.utcnow().isoformat(),
+                    '-' * 80)
+                file.write(title)
+
+            if self.add_timestamp:
+                text = '{} {}\n'.format(dt_util.utcnow().isoformat(), message)
+            else:
+                text = '{}\n'.format(message)
+            file.write(text)