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a25e3767d4
searxng/searxng_extra/update/update_languages.py
Markus Heiser a25e3767d4 [fix] don't show flags for languages without region identifier 
SearXNG shows two different things:

region:
  "de-CH" is the equivalent of "Schweiz (de)" in DDG.

languages:
  "en" doesn't say anything about the location. It is up the engines to do their
  best to select English results without a region.

Suggested-by: @dalf https://github.com/searxng/searxng/pull/967#issuecomment-1072979693
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
2022-03-19 15:09:13 +01:00

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#!/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
}
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
# 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 = 13
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:
# 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, None)
else:
filtered_countries[lang] = _copy_lang_data(lang, None)
filtered_languages_with_countries.update(filtered_countries)
return filtered_languages_with_countries
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],
languages[code].get('country_name') 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)
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