mirror of
https://github.com/searxng/searxng.git
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6e5f22e558
Implementations of the *traits* of the engines.
Engine's traits are fetched from the origin engine and stored in a JSON file in
the *data folder*. Most often traits are languages and region codes and their
mapping from SearXNG's representation to the representation in the origin search
engine.
To load traits from the persistence::
searx.enginelib.traits.EngineTraitsMap.from_data()
For new traits new properties can be added to the class::
searx.enginelib.traits.EngineTraits
.. hint::
Implementation is downward compatible to the deprecated *supported_languages
method* from the vintage implementation.
The vintage code is tagged as *deprecated* an can be removed when all engines
has been ported to the *traits method*.
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
337 lines
12 KiB
Python
Executable File
337 lines
12 KiB
Python
Executable File
#!/usr/bin/env python
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# lint: pylint
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# SPDX-License-Identifier: AGPL-3.0-or-later
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"""Update :py:obj:`searx.enginelib.traits.EngineTraitsMap` and :origin:`searx/languages.py`
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:py:obj:`searx.enginelib.traits.EngineTraitsMap.ENGINE_TRAITS_FILE`:
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Persistence of engines traits, fetched from the engines.
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:origin:`searx/languages.py`
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Is generated from intersecting each engine's supported traits.
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The script :origin:`searxng_extra/update/update_engine_traits.py` is called in
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the :origin:`CI Update data ... <.github/workflows/data-update.yml>`
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"""
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# pylint: disable=invalid-name
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from unicodedata import lookup
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from pathlib import Path
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from pprint import pformat
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from babel import Locale, UnknownLocaleError
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from babel.languages import get_global
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from babel.core import parse_locale
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from searx import settings, searx_dir
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from searx import network
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from searx.engines import load_engines, engines
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from searx.enginelib.traits import EngineTraitsMap
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# Output files.
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languages_file = Path(searx_dir) / 'languages.py'
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def fetch_traits_map():
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"""Fetchs supported languages for each engine and writes json file with those."""
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network.set_timeout_for_thread(10.0)
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def log(msg):
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print(msg)
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traits_map = EngineTraitsMap.fetch_traits(log=log)
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print("fetched properties from %s engines" % len(traits_map))
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print("write json file: %s" % traits_map.ENGINE_TRAITS_FILE)
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traits_map.save_data()
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return traits_map
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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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lang2emoji = {
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'ha': '\U0001F1F3\U0001F1EA', # Hausa / Niger
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'bs': '\U0001F1E7\U0001F1E6', # Bosnian / Bosnia & Herzegovina
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'jp': '\U0001F1EF\U0001F1F5', # Japanese
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'ua': '\U0001F1FA\U0001F1E6', # Ukrainian
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'he': '\U0001F1EE\U0001F1F7', # Hebrew
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}
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def get_unicode_flag(lang_code):
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"""Determine a unicode flag (emoji) that fits to the ``lang_code``"""
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emoji = lang2emoji.get(lang_code.lower())
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if emoji:
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return emoji
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if len(lang_code) == 2:
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return '\U0001F310'
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language = territory = script = variant = ''
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try:
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language, territory, script, variant = parse_locale(lang_code, '-')
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except ValueError as exc:
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print(exc)
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# https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
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if not territory:
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# https://www.unicode.org/emoji/charts/emoji-list.html#country-flag
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emoji = lang2emoji.get(language)
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if not emoji:
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print(
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"%s --> language: %s / territory: %s / script: %s / variant: %s"
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% (lang_code, language, territory, script, variant)
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)
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return emoji
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emoji = lang2emoji.get(territory.lower())
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if emoji:
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return emoji
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try:
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c1 = lookup('REGIONAL INDICATOR SYMBOL LETTER ' + territory[0])
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c2 = lookup('REGIONAL INDICATOR SYMBOL LETTER ' + territory[1])
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# print("%s --> territory: %s --> %s%s" %(lang_code, territory, c1, c2 ))
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except KeyError as exc:
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print("%s --> territory: %s --> %s" % (lang_code, territory, exc))
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return None
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return c1 + c2
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def get_territory_name(lang_code):
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country_name = None
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locale = get_locale(lang_code)
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try:
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if locale is not None:
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country_name = locale.get_territory_name()
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except FileNotFoundError as exc:
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print("ERROR: %s --> %s" % (locale, exc))
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return country_name
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def join_language_lists(traits_map: EngineTraitsMap):
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"""Join all languages of the engines into one list. The returned language list
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contains language codes (``zh``) and region codes (``zh-TW``). The codes can
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be parsed by babel::
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babel.Locale.parse(language_list[n])
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"""
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# pylint: disable=too-many-branches
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language_list = {}
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for eng_name, eng_traits in traits_map.items():
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eng = engines[eng_name]
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eng_codes = set()
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if eng_traits.data_type == 'traits_v1':
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# items of type 'engine_traits' do have regions & languages, the
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# list of eng_codes should contain both.
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eng_codes.update(eng_traits.regions.keys())
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eng_codes.update(eng_traits.languages.keys())
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elif eng_traits.data_type == 'supported_languages':
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# vintage / deprecated
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_codes = set()
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if isinstance(eng_traits.supported_languages, dict):
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_codes.update(eng_traits.supported_languages.keys())
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elif isinstance(eng_traits.supported_languages, list):
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_codes.update(eng_traits.supported_languages)
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else:
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raise TypeError('engine.supported_languages type %s is unknown' % type(eng_traits.supported_languages))
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for lang_code in _codes:
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# apply custom fixes if necessary
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if lang_code in getattr(eng, 'language_aliases', {}).values():
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lang_code = next(lc for lc, alias in eng.language_aliases.items() if lang_code == alias)
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eng_codes.add(lang_code)
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for lang_code in eng_codes:
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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 = "{lang}-{country}".format(lang=locale.language, country=locale.territory)
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short_code = lang_code.split('-')[0]
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# add language without country if not in list
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if short_code not in language_list:
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if locale:
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# get language's data from babel's Locale object
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language_name = locale.get_language_name().title()
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english_name = locale.english_name.split(' (')[0]
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elif short_code in traits_map['wikipedia'].supported_languages:
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# get language's data from wikipedia if not known by babel
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language_name = traits_map['wikipedia'].supported_languages[short_code]['name']
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english_name = traits_map['wikipedia'].supported_languages[short_code]['english_name']
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else:
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language_name = None
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english_name = None
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# add language to list
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language_list[short_code] = {
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'name': language_name,
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'english_name': english_name,
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'counter': set(),
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'countries': {},
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}
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# add language with country if not in list
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if lang_code != short_code and lang_code not in language_list[short_code]['countries']:
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country_name = ''
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if locale:
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# get country name from babel's Locale object
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try:
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country_name = locale.get_territory_name()
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except FileNotFoundError as exc:
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print("ERROR: %s --> %s" % (locale, exc))
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locale = None
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language_list[short_code]['countries'][lang_code] = {
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'country_name': country_name,
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'counter': set(),
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}
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# count engine for both language_country combination and language alone
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language_list[short_code]['counter'].add(eng_name)
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if lang_code != short_code:
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language_list[short_code]['countries'][lang_code]['counter'].add(eng_name)
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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(joined_languages_map):
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min_engines_per_lang = 12
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min_engines_per_country = 7
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# pylint: disable=consider-using-dict-items, consider-iterating-dictionary
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main_engines = [
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engine_name
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for engine_name in engines.keys()
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if 'general' in engines[engine_name].categories
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and hasattr(engines[engine_name], 'supported_languages')
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and engines[engine_name].supported_languages
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and not engines[engine_name].disabled
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]
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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 = {
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code: lang
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for code, lang in joined_languages_map.items()
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if (
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len(lang['counter']) >= min_engines_per_lang
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or all(main_engine in lang['counter'] for main_engine in main_engines)
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)
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}
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def _copy_lang_data(lang, country_name=None):
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new_dict = {}
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new_dict['name'] = joined_languages_map[lang]['name']
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new_dict['english_name'] = joined_languages_map[lang]['english_name']
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if country_name:
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new_dict['country_name'] = country_name
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return new_dict
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# for each language get country codes supported by most engines or at least one country code
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filtered_languages_with_countries = {}
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for lang, lang_data in filtered_languages.items():
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countries = lang_data['countries']
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filtered_countries = {}
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# get language's country codes with enough supported engines
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for lang_country, country_data in countries.items():
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if len(country_data['counter']) >= min_engines_per_country:
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filtered_countries[lang_country] = _copy_lang_data(lang, country_data['country_name'])
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# add language without countries too if there's more than one country to choose from
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if len(filtered_countries) > 1:
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filtered_countries[lang] = _copy_lang_data(lang, None)
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elif len(filtered_countries) == 1:
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lang_country = next(iter(filtered_countries))
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# if no country has enough engines try to get most likely country code from babel
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if not filtered_countries:
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lang_country = None
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subtags = get_global('likely_subtags').get(lang)
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if subtags:
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country_code = subtags.split('_')[-1]
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if len(country_code) == 2:
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lang_country = "{lang}-{country}".format(lang=lang, country=country_code)
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if lang_country:
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filtered_countries[lang_country] = _copy_lang_data(lang, None)
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else:
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filtered_countries[lang] = _copy_lang_data(lang, None)
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filtered_languages_with_countries.update(filtered_countries)
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return filtered_languages_with_countries
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class UnicodeEscape(str):
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"""Escape unicode string in :py:obj:`pprint.pformat`"""
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def __repr__(self):
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return "'" + "".join([chr(c) for c in self.encode('unicode-escape')]) + "'"
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# Write languages.py.
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def write_languages_file(languages):
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file_headers = (
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"# -*- coding: utf-8 -*-",
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"# list of language codes",
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"# this file is generated automatically by utils/fetch_languages.py",
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"language_codes = (\n",
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)
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language_codes = []
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for code in sorted(languages):
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name = languages[code]['name']
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if name is None:
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print("ERROR: languages['%s'] --> %s" % (code, languages[code]))
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continue
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flag = get_unicode_flag(code) or ''
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item = (
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code,
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languages[code]['name'].split(' (')[0],
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get_territory_name(code) or '',
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languages[code].get('english_name') or '',
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UnicodeEscape(flag),
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)
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language_codes.append(item)
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language_codes = tuple(language_codes)
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with open(languages_file, 'w', encoding='utf-8') as new_file:
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file_content = "{file_headers} {language_codes},\n)\n".format(
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# fmt: off
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file_headers = '\n'.join(file_headers),
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language_codes = pformat(language_codes, indent=4)[1:-1]
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# fmt: on
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)
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new_file.write(file_content)
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new_file.close()
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def main():
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load_engines(settings['engines'])
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traits_map = fetch_traits_map()
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joined_languages_map = join_language_lists(traits_map)
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filtered_languages = filter_language_list(joined_languages_map)
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write_languages_file(filtered_languages)
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if __name__ == "__main__":
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main()
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