mirror of
https://github.com/osm-search/Nominatim.git
synced 2026-02-26 11:08:13 +00:00
17cb59efbd
- the command is now --import-special-phrases - the output is not an sql file anymore, data are directly imported to the database. - the little part on the documentation (section data import) has been modified.
202 lines
8.3 KiB
Python
202 lines
8.3 KiB
Python
"""
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Functions to import special phrases into the database.
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"""
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import logging
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import re
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import sys
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from psycopg2.sql import Identifier, Literal, SQL
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from settings.phrase_settings import BLACK_LIST, WHITE_LIST
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from nominatim.tools.exec_utils import get_url
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LOG = logging.getLogger()
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def import_from_wiki(config, db_connection, languages=None):
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"""
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Iterate through all specified languages and
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extract corresponding special phrases from the wiki.
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"""
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#Compile the match regex to increase performance for the following loop.
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occurence_pattern = re.compile(
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r'\| ([^\|]+) \|\| ([^\|]+) \|\| ([^\|]+) \|\| ([^\|]+) \|\| ([\-YN])'
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)
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sanity_check_pattern = re.compile(r'^\w+$')
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languages = _get_languages(config) if not languages else languages
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#array for pairs of class/type
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pairs = dict()
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for lang in languages:
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LOG.warning('Import phrases for lang: %s', lang)
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wiki_page_xml_content = _get_wiki_content(lang)
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#One match will be of format [label, class, type, operator, plural]
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matches = occurence_pattern.findall(wiki_page_xml_content)
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for match in matches:
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phrase_label = match[0].strip()
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phrase_class = match[1].strip()
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phrase_type = match[2].strip()
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phrase_operator = match[3].strip()
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#hack around a bug where building=yes was imported withq quotes into the wiki
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phrase_type = re.sub(r'\"|"', '', phrase_type)
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#sanity check, in case somebody added garbage in the wiki
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_check_sanity(lang, phrase_class, phrase_type, sanity_check_pattern)
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#blacklisting: disallow certain class/type combinations
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if phrase_class in BLACK_LIST.keys() and phrase_type in BLACK_LIST[phrase_class]:
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continue
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#whitelisting: if class is in whitelist, allow only tags in the list
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if phrase_class in WHITE_LIST.keys() and phrase_type not in WHITE_LIST[phrase_class]:
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continue
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#add class/type to the pairs dict
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pairs[f'{phrase_class}|{phrase_type}'] = (phrase_class, phrase_type)
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_process_amenity(
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db_connection, phrase_label, phrase_class, phrase_type, phrase_operator
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)
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_create_place_classtype_table_and_indexes(db_connection, config, pairs)
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db_connection.commit()
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LOG.warning('Import done.')
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def _get_languages(config):
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"""
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Get list of all languages from env config file
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or default if there is no languages configured.
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The system will extract special phrases only from all specified languages.
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"""
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default_languages = [
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'af', 'ar', 'br', 'ca', 'cs', 'de', 'en', 'es',
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'et', 'eu', 'fa', 'fi', 'fr', 'gl', 'hr', 'hu',
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'ia', 'is', 'it', 'ja', 'mk', 'nl', 'no', 'pl',
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'ps', 'pt', 'ru', 'sk', 'sl', 'sv', 'uk', 'vi']
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return config.LANGUAGES or default_languages
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def _get_wiki_content(lang):
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"""
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Request and return the wiki page's content
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corresponding to special phrases for a given lang.
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Requested URL Example :
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https://wiki.openstreetmap.org/wiki/Special:Export/Nominatim/Special_Phrases/EN
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"""
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url = 'https://wiki.openstreetmap.org/wiki/Special:Export/Nominatim/Special_Phrases/' + lang.upper() # pylint: disable=line-too-long
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return get_url(url)
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def _check_sanity(lang, phrase_class, phrase_type, pattern):
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"""
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Check sanity of given inputs in case somebody added garbage in the wiki.
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If a bad class/type is detected the system will exit with an error.
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"""
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try:
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if len(pattern.findall(phrase_class)) < 1 or len(pattern.findall(phrase_type)) < 1:
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sys.exit()
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except SystemExit:
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LOG.error("Bad class/type for language %s: %s=%s", lang, phrase_class, phrase_type)
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raise
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def _process_amenity(db_connection, phrase_label, phrase_class, phrase_type, phrase_operator):
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"""
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Add phrase lookup and corresponding class and type to the word table based on the operator.
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"""
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with db_connection.cursor() as db_cursor:
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if phrase_operator == 'near':
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db_cursor.execute("""SELECT getorcreate_amenityoperator(
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make_standard_name(%s), %s, %s, 'near')""",
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(phrase_label, phrase_class, phrase_type))
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elif phrase_operator == 'in':
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db_cursor.execute("""SELECT getorcreate_amenityoperator(
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make_standard_name(%s), %s, %s, 'in')""",
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(phrase_label, phrase_class, phrase_type))
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else:
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db_cursor.execute("""SELECT getorcreate_amenity(
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make_standard_name(%s), %s, %s)""",
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(phrase_label, phrase_class, phrase_type))
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def _create_place_classtype_table_and_indexes(db_connection, config, pairs):
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"""
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Create table place_classtype for each given pair.
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Also create indexes on place_id and centroid.
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"""
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LOG.warning('Create tables and indexes...')
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sql_tablespace = config.TABLESPACE_AUX_DATA
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if sql_tablespace:
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sql_tablespace = ' TABLESPACE '+sql_tablespace
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with db_connection.cursor() as db_cursor:
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db_cursor.execute("CREATE INDEX idx_placex_classtype ON placex (class, type)")
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for _, pair in pairs.items():
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phrase_class = pair[0]
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phrase_type = pair[1]
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#Table creation
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_create_place_classtype_table(
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db_connection, sql_tablespace, phrase_class, phrase_type
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)
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#Indexes creation
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_create_place_classtype_indexes(
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db_connection, sql_tablespace, phrase_class, phrase_type
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)
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#Grant access on read to the web user.
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_grant_access_to_webuser(
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db_connection, config, phrase_class, phrase_type
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)
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with db_connection.cursor() as db_cursor:
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db_cursor.execute("DROP INDEX idx_placex_classtype")
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def _create_place_classtype_table(db_connection, sql_tablespace, phrase_class, phrase_type):
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"""
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Create table place_classtype of the given phrase_class/phrase_type if doesn't exit.
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"""
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with db_connection.cursor() as db_cursor:
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db_cursor.execute(SQL(f"""
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CREATE TABLE IF NOT EXISTS {{}} {sql_tablespace}
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AS SELECT place_id AS place_id,st_centroid(geometry) AS centroid FROM placex
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WHERE class = {{}} AND type = {{}}""")
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.format(Identifier(f'place_classtype_{phrase_class}_{phrase_type}'),
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Literal(phrase_class), Literal(phrase_type)))
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def _create_place_classtype_indexes(db_connection, sql_tablespace, phrase_class, phrase_type):
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"""
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Create indexes on centroid and place_id for the place_classtype table.
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"""
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#Index on centroid
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if not db_connection.index_exists(f'idx_place_classtype_{phrase_class}_{phrase_type}_centroid'):
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with db_connection.cursor() as db_cursor:
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db_cursor.execute(SQL(f"""
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CREATE INDEX {{}} ON {{}} USING GIST (centroid) {sql_tablespace}""")
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.format(Identifier(
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f"""idx_place_classtype_{phrase_class}_{phrase_type}_centroid"""),
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Identifier(f'place_classtype_{phrase_class}_{phrase_type}')))
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#Index on place_id
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if not db_connection.index_exists(f'idx_place_classtype_{phrase_class}_{phrase_type}_place_id'):
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with db_connection.cursor() as db_cursor:
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db_cursor.execute(SQL(f"""
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CREATE INDEX {{}} ON {{}} USING btree(place_id) {sql_tablespace}""")
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.format(Identifier(
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f"""idx_place_classtype_{phrase_class}_{phrase_type}_place_id"""),
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Identifier(f'place_classtype_{phrase_class}_{phrase_type}')))
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def _grant_access_to_webuser(db_connection, config, phrase_class, phrase_type):
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"""
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Grant access on read to the table place_classtype for the webuser.
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"""
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with db_connection.cursor() as db_cursor:
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db_cursor.execute(SQL("""GRANT SELECT ON {} TO {}""")
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.format(Identifier(f'place_classtype_{phrase_class}_{phrase_type}'),
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Identifier(config.DATABASE_WEBUSER)))
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