From 43e11cdfba1fb4a71f4cc42251cb59252bae0a9d Mon Sep 17 00:00:00 2001 From: Edward Betts Date: Thu, 8 Jul 2021 14:33:32 +0200 Subject: [PATCH] Add code that was missing from repo --- matcher/nominatim.py | 122 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 matcher/nominatim.py diff --git a/matcher/nominatim.py b/matcher/nominatim.py new file mode 100644 index 0000000..825808a --- /dev/null +++ b/matcher/nominatim.py @@ -0,0 +1,122 @@ +from collections import OrderedDict + +import json +import requests + + +class SearchError(Exception): + pass + + +def lookup_with_params(**kwargs): + url = "http://nominatim.openstreetmap.org/search" + + params = { + "format": "jsonv2", + "addressdetails": 1, + "extratags": 1, + "limit": 20, + "namedetails": 1, + "accept-language": "en", + "polygon_text": 0, + } + params.update(kwargs) + r = requests.get(url, params=params) + if r.status_code == 500: + raise SearchError + + try: + return json.loads(r.text, object_pairs_hook=OrderedDict) + except json.decoder.JSONDecodeError: + raise SearchError(r) + + +def lookup(q): + return lookup_with_params(q=q) + + +def get_us_county(county, state): + if " " not in county and "county" not in county: + county += " county" + results = lookup(q="{}, {}".format(county, state)) + + def pred(hit): + return ( + "osm_type" in hit + and hit["osm_type"] != "node" + and county in hit["display_name"].lower() + ) + + return next(filter(pred, results), None) + + +def get_us_city(name, state): + results = lookup_with_params(city=name, state=state) + if len(results) != 1: + results = [ + hit for hit in results if hit["type"] == "city" or hit["osm_type"] == "node" + ] + if len(results) != 1: + print("more than one") + return + hit = results[0] + if hit["type"] not in ("administrative", "city"): + print("not a city") + return + if hit["osm_type"] == "node": + print("node") + return + if not hit["display_name"].startswith(name): + print("wrong name") + return + assert "osm_type" in hit and "osm_id" in hit and "geotext" in hit + return hit + + +def get_hit_name(hit): + address = hit.get("address") + if not address: + return hit["display_name"] + + address_values = list(address.values()) + n1 = address_values[0] + if len(address) == 1: + return n1 + + country = address.pop("country") + country_code = address.pop("country_code") + if country_code: + country_code == country_code.lower() + + if country_code == "us": + state = address["state"] + return f"{n1}, {state}, USA" + + if country_code == "gb": + country = "UK" + + if len(address) == 1: + return f"{n1}, {country}" + else: + n2 = address_values[1] + return f"{n1}, {n2}, {country}" + +def get_hit_label(hit): + tags = hit["extratags"] + designation = tags.get("designation") + category = hit["category"] + hit_type = hit["type"] + + if designation: + return designation.replace("_", " ") + + if category == "boundary" and hit_type == "administrative": + place = tags.get("place") or tags.get("linked_place") + + if place: + return f"{place} {category}" + + if category == "place": + return f"{hit_type}" + + return f"{hit_type} {category}"