]> git.openstreetmap.org Git - nominatim.git/blob - nominatim/tools/refresh.py
Merge pull request #2472 from lonvia/word-count-computation
[nominatim.git] / nominatim / tools / refresh.py
1 """
2 Functions for bringing auxiliary data in the database up-to-date.
3 """
4 import json
5 import logging
6 from textwrap import dedent
7
8 from psycopg2 import sql as pysql
9
10 from nominatim.db.utils import execute_file
11 from nominatim.db.sql_preprocessor import SQLPreprocessor
12 from nominatim.version import NOMINATIM_VERSION
13
14 LOG = logging.getLogger()
15
16
17 def _add_address_level_rows_from_entry(rows, entry):
18     """ Converts a single entry from the JSON format for address rank
19         descriptions into a flat format suitable for inserting into a
20         PostgreSQL table and adds these lines to `rows`.
21     """
22     countries = entry.get('countries') or (None, )
23     for key, values in entry['tags'].items():
24         for value, ranks in values.items():
25             if isinstance(ranks, list):
26                 rank_search, rank_address = ranks
27             else:
28                 rank_search = rank_address = ranks
29             if not value:
30                 value = None
31             for country in countries:
32                 rows.append((country, key, value, rank_search, rank_address))
33
34 def load_address_levels(conn, table, levels):
35     """ Replace the `address_levels` table with the contents of `levels'.
36
37         A new table is created any previously existing table is dropped.
38         The table has the following columns:
39             country, class, type, rank_search, rank_address
40     """
41     rows = []
42     for entry in levels:
43         _add_address_level_rows_from_entry(rows, entry)
44
45     with conn.cursor() as cur:
46         cur.drop_table(table)
47
48         cur.execute("""CREATE TABLE {} (country_code varchar(2),
49                                         class TEXT,
50                                         type TEXT,
51                                         rank_search SMALLINT,
52                                         rank_address SMALLINT)""".format(table))
53
54         cur.execute_values(pysql.SQL("INSERT INTO {} VALUES %s")
55                            .format(pysql.Identifier(table)), rows)
56
57         cur.execute('CREATE UNIQUE INDEX ON {} (country_code, class, type)'.format(table))
58
59     conn.commit()
60
61 def load_address_levels_from_file(conn, config_file):
62     """ Replace the `address_levels` table with the contents of the config
63         file.
64     """
65     with config_file.open('r') as fdesc:
66         load_address_levels(conn, 'address_levels', json.load(fdesc))
67
68
69 def create_functions(conn, config, enable_diff_updates=True, enable_debug=False):
70     """ (Re)create the PL/pgSQL functions.
71     """
72     sql = SQLPreprocessor(conn, config)
73
74     sql.run_sql_file(conn, 'functions.sql',
75                      disable_diff_updates=not enable_diff_updates,
76                      debug=enable_debug)
77
78
79
80 WEBSITE_SCRIPTS = (
81     'deletable.php',
82     'details.php',
83     'lookup.php',
84     'polygons.php',
85     'reverse.php',
86     'search.php',
87     'status.php'
88 )
89
90 # constants needed by PHP scripts: PHP name, config name, type
91 PHP_CONST_DEFS = (
92     ('Database_DSN', 'DATABASE_DSN', str),
93     ('Default_Language', 'DEFAULT_LANGUAGE', str),
94     ('Log_DB', 'LOG_DB', bool),
95     ('Log_File', 'LOG_FILE', str),
96     ('NoAccessControl', 'CORS_NOACCESSCONTROL', bool),
97     ('Places_Max_ID_count', 'LOOKUP_MAX_COUNT', int),
98     ('PolygonOutput_MaximumTypes', 'POLYGON_OUTPUT_MAX_TYPES', int),
99     ('Search_BatchMode', 'SEARCH_BATCH_MODE', bool),
100     ('Search_NameOnlySearchFrequencyThreshold', 'SEARCH_NAME_ONLY_THRESHOLD', str),
101     ('Use_US_Tiger_Data', 'USE_US_TIGER_DATA', bool),
102     ('MapIcon_URL', 'MAPICON_URL', str),
103 )
104
105
106 def import_wikipedia_articles(dsn, data_path, ignore_errors=False):
107     """ Replaces the wikipedia importance tables with new data.
108         The import is run in a single transaction so that the new data
109         is replace seemlessly.
110
111         Returns 0 if all was well and 1 if the importance file could not
112         be found. Throws an exception if there was an error reading the file.
113     """
114     datafile = data_path / 'wikimedia-importance.sql.gz'
115
116     if not datafile.exists():
117         return 1
118
119     pre_code = """BEGIN;
120                   DROP TABLE IF EXISTS "wikipedia_article";
121                   DROP TABLE IF EXISTS "wikipedia_redirect"
122                """
123     post_code = "COMMIT"
124     execute_file(dsn, datafile, ignore_errors=ignore_errors,
125                  pre_code=pre_code, post_code=post_code)
126
127     return 0
128
129
130 def recompute_importance(conn):
131     """ Recompute wikipedia links and importance for all entries in placex.
132         This is a long-running operations that must not be executed in
133         parallel with updates.
134     """
135     with conn.cursor() as cur:
136         cur.execute('ALTER TABLE placex DISABLE TRIGGER ALL')
137         cur.execute("""
138             UPDATE placex SET (wikipedia, importance) =
139                (SELECT wikipedia, importance
140                 FROM compute_importance(extratags, country_code, osm_type, osm_id))
141             """)
142         cur.execute("""
143             UPDATE placex s SET wikipedia = d.wikipedia, importance = d.importance
144              FROM placex d
145              WHERE s.place_id = d.linked_place_id and d.wikipedia is not null
146                    and (s.wikipedia is null or s.importance < d.importance);
147             """)
148
149         cur.execute('ALTER TABLE placex ENABLE TRIGGER ALL')
150     conn.commit()
151
152
153 def _quote_php_variable(var_type, config, conf_name):
154     if var_type == bool:
155         return 'true' if config.get_bool(conf_name) else 'false'
156
157     if var_type == int:
158         return getattr(config, conf_name)
159
160     if not getattr(config, conf_name):
161         return 'false'
162
163     quoted = getattr(config, conf_name).replace("'", "\\'")
164     return f"'{quoted}'"
165
166
167 def setup_website(basedir, config, conn):
168     """ Create the website script stubs.
169     """
170     if not basedir.exists():
171         LOG.info('Creating website directory.')
172         basedir.mkdir()
173
174     template = dedent("""\
175                       <?php
176
177                       @define('CONST_Debug', $_GET['debug'] ?? false);
178                       @define('CONST_LibDir', '{0}');
179                       @define('CONST_TokenizerDir', '{2}');
180                       @define('CONST_NominatimVersion', '{1[0]}.{1[1]}.{1[2]}-{1[3]}');
181
182                       """.format(config.lib_dir.php, NOMINATIM_VERSION,
183                                  config.project_dir / 'tokenizer'))
184
185     for php_name, conf_name, var_type in PHP_CONST_DEFS:
186         varout = _quote_php_variable(var_type, config, conf_name)
187
188         template += f"@define('CONST_{php_name}', {varout});\n"
189
190     template += f"\nrequire_once('{config.lib_dir.php}/website/{{}}');\n"
191
192     search_name_table_exists = bool(conn and conn.table_exists('search_name'))
193
194     for script in WEBSITE_SCRIPTS:
195         if not search_name_table_exists and script == 'search.php':
196             (basedir / script).write_text(template.format('reverse-only-search.php'), 'utf-8')
197         else:
198             (basedir / script).write_text(template.format(script), 'utf-8')