#!/usr/bin/env python
# SPDX-License-Identifier: AGPL-3.0-or-later
# This script generates languages.py from intersecting each engine's supported languages.
#
# Output files: searx/data/engines_languages.json and searx/languages.py
import json
from pathlib import Path
from pprint import pformat
from babel import Locale, UnknownLocaleError
from babel.languages import get_global
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 = dict()
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:
engines_languages[engine_name] = sorted(engines_languages[engine_name])
# 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
# Join all language lists.
def join_language_lists(engines_languages):
language_list = dict()
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': dict()}
# 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
country_name = locale.get_territory_name()
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 = 13
min_engines_per_country = 7
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 = 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 = dict()
for lang, lang_data in filtered_languages.items():
countries = lang_data['countries']
filtered_countries = dict()
# 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)
elif len(filtered_countries) == 1:
# if there's only one country per language, it's not necessary to show country name
lang_country = next(iter(filtered_countries))
filtered_countries[lang_country]['country_name'] = None
# 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)
else:
filtered_countries[lang] = _copy_lang_data(lang)
filtered_languages_with_countries.update(filtered_countries)
return filtered_languages_with_countries
# 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 ="
)
language_codes = tuple([
(
code,
languages[code]['name'].split(' (')[0],
languages[code].get('country_name') or '',
languages[code].get('english_name') or ''
) for code in sorted(languages)
])
with open(languages_file, 'w') as new_file:
file_content = "{file_headers} \\\n{language_codes}".format(
file_headers='\n'.join(file_headers),
language_codes=pformat(language_codes, indent=4)
)
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)
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