mirror of
https://github.com/searx/searx
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772c048d01
Add match_language function in utils to match any user given language code with a list of engine's supported languages. Also add language_aliases dict on each engine to translate standard language codes into the custom codes used by the engine.
190 lines
7.7 KiB
Python
190 lines
7.7 KiB
Python
# -*- coding: utf-8 -*-
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# This script generates languages.py from intersecting each engine's supported languages.
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#
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# Output files (engines_languages.json and languages.py)
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# are written in current directory to avoid overwriting in case something goes wrong.
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from json import dump
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import io
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from sys import path
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from babel import Locale, UnknownLocaleError
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from babel.languages import get_global
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path.append('../searx') # noqa
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from searx import settings
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from searx.engines import initialize_engines, engines
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# Output files.
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engines_languages_file = 'engines_languages.json'
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languages_file = 'languages.py'
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# Fetchs supported languages for each engine and writes json file with those.
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def fetch_supported_languages():
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engines_languages = {}
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for engine_name in engines:
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if hasattr(engines[engine_name], 'fetch_supported_languages'):
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try:
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engines_languages[engine_name] = engines[engine_name].fetch_supported_languages()
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except Exception as e:
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print(e)
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# write json file
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with io.open(engines_languages_file, "w", encoding="utf-8") as f:
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dump(engines_languages, f, ensure_ascii=False)
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return engines_languages
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# Get babel Locale object from lang_code if possible.
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def get_locale(lang_code):
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try:
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locale = Locale.parse(lang_code, sep='-')
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return locale
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except (UnknownLocaleError, ValueError):
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return None
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# Append engine_name to list of engines that support locale.
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def add_engine_counter(lang_code, engine_name, languages):
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if lang_code in languages:
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if 'counter' not in languages[lang_code]:
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languages[lang_code]['counter'] = [engine_name]
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elif engine_name not in languages[lang_code]['counter']:
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languages[lang_code]['counter'].append(engine_name)
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# Join all language lists.
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# TODO: Add language names from engine's language list if name not known by babel.
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def join_language_lists(engines_languages):
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language_list = {}
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for engine_name in engines_languages:
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for lang_code in engines_languages[engine_name]:
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# apply custom fixes if necessary
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if lang_code in getattr(engines[engine_name], 'language_aliases', {}).values():
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lang_code = next(lc for lc, alias in engines[engine_name].language_aliases.items()
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if lang_code == alias)
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locale = get_locale(lang_code)
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# ensure that lang_code uses standard language and country codes
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if locale and locale.territory:
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lang_code = locale.language + '-' + locale.territory
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# add locale if it's not in list
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if lang_code not in language_list:
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if locale:
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language_list[lang_code] = {'name': locale.get_language_name().title(),
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'english_name': locale.english_name,
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'country': locale.get_territory_name() or ''}
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# also add language without country
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if locale.language not in language_list:
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language_list[locale.language] = {'name': locale.get_language_name().title(),
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'english_name': locale.english_name}
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else:
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language_list[lang_code] = {}
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# count engine for both language_country combination and language alone
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add_engine_counter(lang_code, engine_name, language_list)
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add_engine_counter(lang_code.split('-')[0], engine_name, language_list)
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return language_list
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# Filter language list so it only includes the most supported languages and countries.
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def filter_language_list(all_languages):
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min_supported_engines = 10
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main_engines = [engine_name for engine_name in engines.keys()
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if 'general' in engines[engine_name].categories and
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engines[engine_name].supported_languages and
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not engines[engine_name].disabled]
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# filter list to include only languages supported by most engines or all default general engines
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filtered_languages = {code: lang for code, lang
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in all_languages.items()
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if (len(lang.get('counter', [])) >= min_supported_engines or
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all(main_engine in lang.get('counter', [])
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for main_engine in main_engines))}
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return filtered_languages
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# Add country codes to languages without one and filter out language codes.
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def assign_country_codes(filtered_languages, all_languages):
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sorted_languages = sorted(all_languages,
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key=lambda lang: len(all_languages[lang].get('counter', [])),
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reverse=True)
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previous_lang = None
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previous_code = None
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countries = 0
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for current_code in sorted(filtered_languages):
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current_lang = current_code.split('-')[0]
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# count country codes per language
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if current_lang == previous_lang:
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countries += 1
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else:
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if previous_lang is not None:
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# if language has no single country code
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if countries == 0:
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# try to get country code with most supported engines
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for l in sorted_languages:
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l_parts = l.split('-')
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if len(l_parts) == 2 and l_parts[0] == previous_lang:
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filtered_languages[l] = all_languages[l]
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filtered_languages[l]['country'] = ''
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countries = 1
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break
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if countries == 0:
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# get most likely country code from babel
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subtags = get_global('likely_subtags').get(previous_lang)
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if subtags:
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subtag_parts = subtags.split('_')
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new_code = subtag_parts[0] + '-' + subtag_parts[-1]
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filtered_languages[new_code] = all_languages[previous_lang]
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countries = 1
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if countries == 1:
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# remove countryless version of language if there's only one country
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del filtered_languages[previous_lang]
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if previous_code in filtered_languages:
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filtered_languages[previous_code]['country'] = ''
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countries = 0
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previous_lang = current_lang
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previous_code = current_code
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# Write languages.py.
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def write_languages_file(languages):
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new_file = open(languages_file, 'wb')
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file_content = '# -*- coding: utf-8 -*-\n'\
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+ '# list of language codes\n'\
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+ '# this file is generated automatically by utils/update_search_languages.py\n'\
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+ '\nlanguage_codes = ('
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for code in sorted(languages):
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file_content += '\n (u"' + code + '"'\
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+ ', u"' + languages[code]['name'].split(' (')[0] + '"'\
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+ ', u"' + languages[code].get('country', '') + '"'\
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+ ', u"' + languages[code].get('english_name', '').split(' (')[0] + '"),'
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# remove last comma
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file_content = file_content[:-1]
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file_content += '\n)\n'
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new_file.write(file_content.encode('utf8'))
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new_file.close()
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if __name__ == "__main__":
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initialize_engines(settings['engines'])
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engines_languages = fetch_supported_languages()
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all_languages = join_language_lists(engines_languages)
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filtered_languages = filter_language_list(all_languages)
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assign_country_codes(filtered_languages, all_languages)
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write_languages_file(filtered_languages)
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