1 # SPDX-License-Identifier: GPL-2.0-only
3 # This file is part of Nominatim. (https://nominatim.org)
5 # Copyright (C) 2022 by the Nominatim developer community.
6 # For a full list of authors see the git log.
8 Functions for importing and managing static country information.
11 from io import StringIO
12 import psycopg2.extras
14 from nominatim.db import utils as db_utils
15 from nominatim.db.connection import connect
18 """ Caches country-specific properties from the configuration file.
25 def load(self, config):
26 """ Load the country properties from the configuration files,
27 if they are not loaded yet.
30 self._info = config.load_sub_configuration('country_settings.yaml')
31 # Convert languages into a list for simpler handling.
32 for prop in self._info.values():
33 if 'languages' not in prop:
34 prop['languages'] = []
35 elif not isinstance(prop['languages'], list):
36 prop['languages'] = [x.strip()
37 for x in prop['languages'].split(',')]
38 if 'name' not in prop:
42 """ Return tuples of (country_code, property dict) as iterable.
44 return self._info.items()
47 _COUNTRY_INFO = _CountryInfo()
49 def setup_country_config(config):
50 """ Load country properties from the configuration file.
51 Needs to be called before using any other functions in this
54 _COUNTRY_INFO.load(config)
58 """ Iterate over country code and properties.
60 return _COUNTRY_INFO.items()
63 def setup_country_tables(dsn, sql_dir, ignore_partitions=False):
64 """ Create and populate the tables with basic static data that provides
65 the background for geocoding. Data is assumed to not yet exist.
67 db_utils.execute_file(dsn, sql_dir / 'country_osm_grid.sql.gz')
69 params, country_names_data = [], ''
70 for ccode, props in _COUNTRY_INFO.items():
71 if ccode is not None and props is not None:
75 partition = props.get('partition')
76 lang = props['languages'][0] if len(props['languages']) == 1 else None
77 params.append((ccode, partition, lang))
79 name = json.dumps(props.get('name'), ensure_ascii=False, separators=(', ', '=>'))
80 country_names_data += ccode + '\t' + name[1:-1] + '\n'
82 with connect(dsn) as conn:
83 with conn.cursor() as cur:
85 """CREATE TABLE public.country_name (
86 country_code character varying(2),
88 derived_name public.hstore,
89 country_default_language_code text,
92 data = StringIO(country_names_data)
93 cur.copy_from(data, 'country_name', columns=('country_code', 'name'))
95 """ UPDATE country_name
96 SET partition = part, country_default_language_code = lang
97 FROM (VALUES %s) AS v (cc, part, lang)
98 WHERE country_code = v.cc""", params)
102 def create_country_names(conn, tokenizer, languages=None):
103 """ Add default country names to search index. `languages` is a comma-
104 separated list of language codes as used in OSM. If `languages` is not
105 empty then only name translations for the given languages are added
109 languages = languages.split(',')
111 def _include_key(key):
112 return key == 'name' or \
113 (key.startswith('name:') and (not languages or key[5:] in languages))
115 with conn.cursor() as cur:
116 psycopg2.extras.register_hstore(cur)
117 cur.execute("""SELECT country_code, name FROM country_name
118 WHERE country_code is not null""")
120 with tokenizer.name_analyzer() as analyzer:
121 for code, name in cur:
122 names = {'countrycode': code}
124 names['short_name'] = 'UK'
126 names['short_name'] = 'United States'
128 # country names (only in languages as provided)
130 names.update(((k, v) for k, v in name.items() if _include_key(k)))
132 analyzer.add_country_names(code, names)