Source code for searxng_extra.update.update_languages

#!/usr/bin/env python
# lint: pylint

# SPDX-License-Identifier: AGPL-3.0-or-later
"""This script generates languages.py from intersecting each engine's supported
languages.

Output files: :origin:`searx/data/engines_languages.json` and
:origin:`searx/languages.py` (:origin:`CI Update data ...
<.github/workflows/data-update.yml>`).

"""

# pylint: disable=invalid-name
from unicodedata import lookup
import json
from pathlib import Path
from pprint import pformat
from babel import Locale, UnknownLocaleError
from babel.languages import get_global
from babel.core import parse_locale

from searx import settings, searx_dir
from searx.engines import load_engines, engines
from searx.network import set_timeout_for_thread

# Output files.
engines_languages_file = Path(searx_dir) / 'data' / 'engines_languages.json'
languages_file = Path(searx_dir) / 'languages.py'


# Fetchs supported languages for each engine and writes json file with those.
def fetch_supported_languages():
    set_timeout_for_thread(10.0)

    engines_languages = {}
    names = list(engines)
    names.sort()

    for engine_name in names:
        if hasattr(engines[engine_name], 'fetch_supported_languages'):
            engines_languages[engine_name] = engines[engine_name].fetch_supported_languages()
            print("fetched %s languages from engine %s" % (len(engines_languages[engine_name]), engine_name))
            if type(engines_languages[engine_name]) == list:  # pylint: disable=unidiomatic-typecheck
                engines_languages[engine_name] = sorted(engines_languages[engine_name])

    print("fetched languages from %s engines" % len(engines_languages))

    # write json file
    with open(engines_languages_file, 'w', encoding='utf-8') as f:
        json.dump(engines_languages, f, indent=2, sort_keys=True)

    return engines_languages


# Get babel Locale object from lang_code if possible.
def get_locale(lang_code):
    try:
        locale = Locale.parse(lang_code, sep='-')
        return locale
    except (UnknownLocaleError, ValueError):
        return None


lang2emoji = {
    'ha': '\U0001F1F3\U0001F1EA',  # Hausa / Niger
    'bs': '\U0001F1E7\U0001F1E6',  # Bosnian / Bosnia & Herzegovina
    'jp': '\U0001F1EF\U0001F1F5',  # Japanese
    'ua': '\U0001F1FA\U0001F1E6',  # Ukrainian
    'he': '\U0001F1EE\U0001F1F7',  # Hebrew
}


[docs]def get_unicode_flag(lang_code): """Determine a unicode flag (emoji) that fits to the ``lang_code``""" emoji = lang2emoji.get(lang_code.lower()) if emoji: return emoji if len(lang_code) == 2: return '\U0001F310' language = territory = script = variant = '' try: language, territory, script, variant = parse_locale(lang_code, '-') except ValueError as exc: print(exc) # https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 if not territory: # https://www.unicode.org/emoji/charts/emoji-list.html#country-flag emoji = lang2emoji.get(language) if not emoji: print( "%s --> language: %s / territory: %s / script: %s / variant: %s" % (lang_code, language, territory, script, variant) ) return emoji emoji = lang2emoji.get(territory.lower()) if emoji: return emoji try: c1 = lookup('REGIONAL INDICATOR SYMBOL LETTER ' + territory[0]) c2 = lookup('REGIONAL INDICATOR SYMBOL LETTER ' + territory[1]) # print("%s --> territory: %s --> %s%s" %(lang_code, territory, c1, c2 )) except KeyError as exc: print("%s --> territory: %s --> %s" % (lang_code, territory, exc)) return None return c1 + c2
def get_territory_name(lang_code): country_name = None locale = get_locale(lang_code) try: if locale is not None: country_name = locale.get_territory_name() except FileNotFoundError as exc: print("ERROR: %s --> %s" % (locale, exc)) return country_name # Join all language lists. def join_language_lists(engines_languages): language_list = {} for engine_name in engines_languages: for lang_code in engines_languages[engine_name]: # apply custom fixes if necessary if lang_code in getattr(engines[engine_name], 'language_aliases', {}).values(): lang_code = next( lc for lc, alias in engines[engine_name].language_aliases.items() if lang_code == alias ) locale = get_locale(lang_code) # ensure that lang_code uses standard language and country codes if locale and locale.territory: lang_code = "{lang}-{country}".format(lang=locale.language, country=locale.territory) short_code = lang_code.split('-')[0] # add language without country if not in list if short_code not in language_list: if locale: # get language's data from babel's Locale object language_name = locale.get_language_name().title() english_name = locale.english_name.split(' (')[0] elif short_code in engines_languages['wikipedia']: # get language's data from wikipedia if not known by babel language_name = engines_languages['wikipedia'][short_code]['name'] english_name = engines_languages['wikipedia'][short_code]['english_name'] else: language_name = None english_name = None # add language to list language_list[short_code] = { 'name': language_name, 'english_name': english_name, 'counter': set(), 'countries': {}, } # add language with country if not in list if lang_code != short_code and lang_code not in language_list[short_code]['countries']: country_name = '' if locale: # get country name from babel's Locale object try: country_name = locale.get_territory_name() except FileNotFoundError as exc: print("ERROR: %s --> %s" % (locale, exc)) locale = None language_list[short_code]['countries'][lang_code] = { 'country_name': country_name, 'counter': set(), } # count engine for both language_country combination and language alone language_list[short_code]['counter'].add(engine_name) if lang_code != short_code: language_list[short_code]['countries'][lang_code]['counter'].add(engine_name) return language_list # Filter language list so it only includes the most supported languages and countries def filter_language_list(all_languages): min_engines_per_lang = 12 min_engines_per_country = 7 # pylint: disable=consider-using-dict-items, consider-iterating-dictionary main_engines = [ engine_name for engine_name in engines.keys() if 'general' in engines[engine_name].categories and engines[engine_name].supported_languages and not engines[engine_name].disabled ] # filter list to include only languages supported by most engines or all default general engines filtered_languages = { code: lang for code, lang in all_languages.items() if ( len(lang['counter']) >= min_engines_per_lang or all(main_engine in lang['counter'] for main_engine in main_engines) ) } def _copy_lang_data(lang, country_name=None): new_dict = {} new_dict['name'] = all_languages[lang]['name'] new_dict['english_name'] = all_languages[lang]['english_name'] if country_name: new_dict['country_name'] = country_name return new_dict # for each language get country codes supported by most engines or at least one country code filtered_languages_with_countries = {} for lang, lang_data in filtered_languages.items(): countries = lang_data['countries'] filtered_countries = {} # get language's country codes with enough supported engines for lang_country, country_data in countries.items(): if len(country_data['counter']) >= min_engines_per_country: filtered_countries[lang_country] = _copy_lang_data(lang, country_data['country_name']) # add language without countries too if there's more than one country to choose from if len(filtered_countries) > 1: filtered_countries[lang] = _copy_lang_data(lang, None) elif len(filtered_countries) == 1: lang_country = next(iter(filtered_countries)) # if no country has enough engines try to get most likely country code from babel if not filtered_countries: lang_country = None subtags = get_global('likely_subtags').get(lang) if subtags: country_code = subtags.split('_')[-1] if len(country_code) == 2: lang_country = "{lang}-{country}".format(lang=lang, country=country_code) if lang_country: filtered_countries[lang_country] = _copy_lang_data(lang, None) else: filtered_countries[lang] = _copy_lang_data(lang, None) filtered_languages_with_countries.update(filtered_countries) return filtered_languages_with_countries
[docs]class UnicodeEscape(str): """Escape unicode string in :py:obj:`pprint.pformat`""" def __repr__(self): return "'" + "".join([chr(c) for c in self.encode('unicode-escape')]) + "'"
# Write languages.py. def write_languages_file(languages): file_headers = ( "# -*- coding: utf-8 -*-", "# list of language codes", "# this file is generated automatically by utils/fetch_languages.py", "language_codes = (\n", ) language_codes = [] for code in sorted(languages): name = languages[code]['name'] if name is None: print("ERROR: languages['%s'] --> %s" % (code, languages[code])) continue flag = get_unicode_flag(code) or '' item = ( code, languages[code]['name'].split(' (')[0], get_territory_name(code) or '', languages[code].get('english_name') or '', UnicodeEscape(flag), ) language_codes.append(item) language_codes = tuple(language_codes) with open(languages_file, 'w', encoding='utf-8') as new_file: file_content = "{file_headers} {language_codes},\n)\n".format( # fmt: off file_headers = '\n'.join(file_headers), language_codes = pformat(language_codes, indent=4)[1:-1] # fmt: on ) new_file.write(file_content) new_file.close() if __name__ == "__main__": load_engines(settings['engines']) _engines_languages = fetch_supported_languages() _all_languages = join_language_lists(_engines_languages) _filtered_languages = filter_language_list(_all_languages) write_languages_file(_filtered_languages)