added refactored google timeline import script

contrib/google-import/README.md

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+# Google Location History Importer
+Reads a JSON export of Google Location History from
+[Google Takeout](https://takeout.google.com/settings/takeout) and publishes all of its locations
+to MQTT. Useful for importing Google Location History into OwnTracks Recorder.
+
+## How to use
+1. Ensure you have python3 installed
+1. `pip install paho.mqtt`
+1. `python3 import-google.py` for basic instructions.  
+    * 'filename' is the records.json in the takeout zip file
+    * 'topic' default is "owntracks/<user>/<deviceId>"
+    * 'tid' is the 2 letter tracker ID

contrib/google-import/google-import.py

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+## original script by smmr0 as found in the deprecated owncloud/tools repo
+## updated to make tid value configurable
+## updated to work with new takeout json format
+
+#!/usr/bin/env python3
+from datetime import datetime 
+import time
+import argparse
+import json
+from paho.mqtt import client, publish
+
+class ProtocolAction(argparse.Action):
+	def __call__(self, parser, namespace, value, option_string=None):
+		setattr(namespace, self.dest, getattr(client, value))
+
+## Custom type for tid argument to allow only 2 letters
+def tid_type(arg_value, pat=re.compile(r"^[A-Za-z]{2}$")):
+    if not pat.match(arg_value):
+        raise argparse.ArgumentTypeError("invalid value, must be 2 letters (e.g. 'aa')")
+    return arg_value
+
+
+parser = argparse.ArgumentParser(description='Import Google Location History into OwnTracks')
+parser.add_argument('-H', '--host', default='localhost', help='MQTT host (localhost)')
+parser.add_argument('-p', '--port', type=int, default=1883, help='MQTT port (1883)')
+parser.add_argument('--protocol', action=ProtocolAction, default=client.MQTTv31, help='MQTT protocol (MQTTv31)')
+parser.add_argument('--cacerts', help='Path to files containing trusted CA certificates')
+parser.add_argument('--cert', help='Path to file containing TLS client certificate')
+parser.add_argument('--key', help='Path to file containing TLS client private key')
+parser.add_argument('--tls-version', help='TLS protocol version')
+parser.add_argument('--ciphers', help='List of TLS ciphers')
+parser.add_argument('-u', '--username', help='MQTT username')
+parser.add_argument('-P', '--password', help='MQTT password')
+parser.add_argument('-i', '--clientid', help='MQTT client-ID')
+parser.add_argument('-t', '--topic', required=True, help='MQTT topic (e.g. owntracks/<user>/<deviceId>)')
+parser.add_argument('--tid', required=True, type=tid_type, help="Two letter Tracker ID you want these associated to (e.g. 'aa')")
+parser.add_argument('filename', help='Path to file containing JSON-formatted data from Google Location History exported by Google Takeout')
+args = parser.parse_args()
+
+messages = []
+with open(args.filename) as lh:
+	lh_data = json.load(lh)
+	for location in lh_data['locations']:
+		location_keys = location.keys()
+		payload = {
+			'_type': 'location'
+		}
+		payload['tid'] = args.tid
+		if 'timestamp' in location_keys:
+			#some of the google timestamps did not include milliseconds.
+			time_format = "%Y-%m-%dT%H:%M:%S.%fZ" if '.' in location['timestamp'] else "%Y-%m-%dT%H:%M:%SZ"
+			payload['tst'] = int(time.mktime(datetime.strptime(location['timestamp'], time_format).timetuple()))
+		if 'latitudeE7' in location_keys:
+			payload['lat'] = location['latitudeE7'] / 10000000
+		if 'longitudeE7' in location_keys:
+			payload['lon'] = location['longitudeE7'] / 10000000
+		if 'accuracy' in location_keys:
+			payload['acc'] = location['accuracy']
+		if 'altitude' in location_keys:
+			payload['alt'] = location['altitude']
+		messages.append(
+			{
+				'topic': args.topic,
+				'payload': json.dumps(payload),
+				'qos': 2
+			}
+		)
+	del lh_data
+
+if args.username != None:
+	auth={
+		'username': args.username,
+		'password': args.password
+	}
+else:
+	auth = None
+
+if args.cacerts != None:
+	tls = {
+		'ca_certs': args.cacerts,
+		'certfile': args.cert,
+		'keyfile': args.key,
+		'tls_version': args.tls_version,
+		'ciphers': args.ciphers
+	}
+else:
+	tls = None
+
+publish.multiple(
+	messages,
+	hostname=args.host,
+	port=args.port,
+	client_id=args.clientid,
+	auth=auth,
+	tls=tls
+)