location_history_minify

location_history_minify.py

#!/usr/bin/env python

# Copyright 2014 Gerwin Sturm, FoldedSoft e.U. / www.foldedsoft.at
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import sys
import json
import math
from argparse import ArgumentParser


def main(argv):
    arg_parser = ArgumentParser()
    arg_parser.add_argument("input", help="Input File (JSON)")
    arg_parser.add_argument("-o", "--output", help="Output File")
    args = arg_parser.parse_args()
    if not args.output:
        args.output = '.'.join(args.input.split('.')[:-1]) + '_small.json'
    if args.input == args.output:
        arg_parser.error("Input and output have to be different files")
        return

    try:
        json_data = open(args.input).read()
    except:
        print("Error opening input file")
        return

    try:
        data = json.loads(json_data)
    except:
        print("Error decoding json")
        return

    if "locations" in data and len(data["locations"]) > 0:
        try:
            f_out = open(args.output, "w")
        except:
            print("Error creating output file for writing")
            return

        locations = [{
            "timestampMs": item["timestampMs"],
            "latitudeE7": item["latitudeE7"],
            "longitudeE7": item["longitudeE7"],
        } for item in data["locations"]]

        json.dump({"locations": locations}, f_out)
        f_out.close()

    else:
        print("No data found in json")
        return

if __name__ == "__main__":
    sys.exit(main(sys.argv))