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# ENTRY:

if __name__ == "__main__":
    download_all()

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# MASTER:

def download_all():
    for region in PARAM['regions']:
        try:
            logging.info("Downloading region '{}'...".format(region))
            download(region)
            logging.info("Download OK!")
        except urllib.error.URLError:
            logging.exception("Download failed (no connection or wrong URL?).")

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# SLAVES:

def download(region):
    bbox = PARAM['regions'][region]

    url = PARAM['API-URL'].format(bbox="{0},{1},{2},{3}".format(*bbox))
    out = OFILE['OSM'].format(region=region)

    meta = {
        'Region': region,

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# AUXILIARY:

# https://stackoverflow.com/questions/34491808/how-to-get-the-current-scripts-code-in-python
THIS = inspect.getsource(inspect.getmodule(inspect.currentframe()))

# Set logger verbosity and output format
logging.basicConfig(
    level=logging.DEBUG,
    format="%(levelname)-8s [%(asctime)s] : %(message)s",
    datefmt="%Y%m%d %H:%M:%S %Z"

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# PARAMETERS:

PARAM = {
    # Bounding box to download [left, bottom, right, top]
    # https://wiki.openstreetmap.org/wiki/API_v0.6
    'regions': {
        'kaohsiung_small': [120.2206, 22.4827, 120.4308, 22.7578],
        'kaohsiung_large': [119.9377, 22.1645, 120.8084, 23.3347],
    },

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for fn in OFILE.values():
    os.makedirs(os.path.dirname(fn).format(), exist_ok=True)

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# OUTPUT FILES:

OFILE = {
    # Put the downloaded *.osm files here
    'OSM': "OUTPUT/maps/UV/{region}.osm",

    # Record meta-info here
    'OSM-meta': "OUTPUT/maps/{region}_meta.txt",
}

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# INPUT FILES:

pass

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# IMPORTS:

import os
import json
import inspect
import logging
import datetime as dt
import urllib.request, urllib.error

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# RA, 2019-01-15
# Download an OpenStreetMap file based on a lat-lon bounding box

# License: CC0 -- "No rights reserved"