From 43e11cdfba1fb4a71f4cc42251cb59252bae0a9d Mon Sep 17 00:00:00 2001
From: Edward Betts <edward@4angle.com>
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}"