mirror of
https://github.com/searxng/searxng.git
synced 2024-05-10 15:42:41 +00:00
542f7d0d7b
In the past, some files were tested with the standard profile, others with a profile in which most of the messages were switched off ... some files were not checked at all. - ``PYLINT_SEARXNG_DISABLE_OPTION`` has been abolished - the distinction ``# lint: pylint`` is no longer necessary - the pylint tasks have been reduced from three to two 1. ./searx/engines -> lint engines with additional builtins 2. ./searx ./searxng_extra ./tests -> lint all other python files Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
251 lines
9.1 KiB
Python
251 lines
9.1 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
"""Engine's traits are fetched from the origin engines 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. For new traits new properties can be added to the class
|
|
:py:class:`EngineTraits`.
|
|
|
|
To load traits from the persistence :py:obj:`EngineTraitsMap.from_data` can be
|
|
used.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
import json
|
|
import dataclasses
|
|
import types
|
|
from typing import Dict, Literal, Iterable, Union, Callable, Optional, TYPE_CHECKING
|
|
|
|
from searx import locales
|
|
from searx.data import data_dir, ENGINE_TRAITS
|
|
|
|
if TYPE_CHECKING:
|
|
from . import Engine
|
|
|
|
|
|
class EngineTraitsEncoder(json.JSONEncoder):
|
|
"""Encodes :class:`EngineTraits` to a serializable object, see
|
|
:class:`json.JSONEncoder`."""
|
|
|
|
def default(self, o):
|
|
"""Return dictionary of a :class:`EngineTraits` object."""
|
|
if isinstance(o, EngineTraits):
|
|
return o.__dict__
|
|
return super().default(o)
|
|
|
|
|
|
@dataclasses.dataclass
|
|
class EngineTraits:
|
|
"""The class is intended to be instantiated for each engine."""
|
|
|
|
regions: Dict[str, str] = dataclasses.field(default_factory=dict)
|
|
"""Maps SearXNG's internal representation of a region to the one of the engine.
|
|
|
|
SearXNG's internal representation can be parsed by babel and the value is
|
|
send to the engine:
|
|
|
|
.. code:: python
|
|
|
|
regions ={
|
|
'fr-BE' : <engine's region name>,
|
|
}
|
|
|
|
for key, egnine_region regions.items():
|
|
searxng_region = babel.Locale.parse(key, sep='-')
|
|
...
|
|
"""
|
|
|
|
languages: Dict[str, str] = dataclasses.field(default_factory=dict)
|
|
"""Maps SearXNG's internal representation of a language to the one of the engine.
|
|
|
|
SearXNG's internal representation can be parsed by babel and the value is
|
|
send to the engine:
|
|
|
|
.. code:: python
|
|
|
|
languages = {
|
|
'ca' : <engine's language name>,
|
|
}
|
|
|
|
for key, egnine_lang in languages.items():
|
|
searxng_lang = babel.Locale.parse(key)
|
|
...
|
|
"""
|
|
|
|
all_locale: Optional[str] = None
|
|
"""To which locale value SearXNG's ``all`` language is mapped (shown a "Default
|
|
language").
|
|
"""
|
|
|
|
data_type: Literal['traits_v1'] = 'traits_v1'
|
|
"""Data type, default is 'traits_v1'.
|
|
"""
|
|
|
|
custom: Dict[str, Union[Dict[str, Dict], Iterable[str]]] = dataclasses.field(default_factory=dict)
|
|
"""A place to store engine's custom traits, not related to the SearXNG core.
|
|
"""
|
|
|
|
def get_language(self, searxng_locale: str, default=None):
|
|
"""Return engine's language string that *best fits* to SearXNG's locale.
|
|
|
|
:param searxng_locale: SearXNG's internal representation of locale
|
|
selected by the user.
|
|
|
|
:param default: engine's default language
|
|
|
|
The *best fits* rules are implemented in
|
|
:py:obj:`searx.locales.get_engine_locale`. Except for the special value ``all``
|
|
which is determined from :py:obj:`EngineTraits.all_locale`.
|
|
"""
|
|
if searxng_locale == 'all' and self.all_locale is not None:
|
|
return self.all_locale
|
|
return locales.get_engine_locale(searxng_locale, self.languages, default=default)
|
|
|
|
def get_region(self, searxng_locale: str, default=None):
|
|
"""Return engine's region string that best fits to SearXNG's locale.
|
|
|
|
:param searxng_locale: SearXNG's internal representation of locale
|
|
selected by the user.
|
|
|
|
:param default: engine's default region
|
|
|
|
The *best fits* rules are implemented in
|
|
:py:obj:`searx.locales.get_engine_locale`. Except for the special value ``all``
|
|
which is determined from :py:obj:`EngineTraits.all_locale`.
|
|
"""
|
|
if searxng_locale == 'all' and self.all_locale is not None:
|
|
return self.all_locale
|
|
return locales.get_engine_locale(searxng_locale, self.regions, default=default)
|
|
|
|
def is_locale_supported(self, searxng_locale: str) -> bool:
|
|
"""A *locale* (SearXNG's internal representation) is considered to be
|
|
supported by the engine if the *region* or the *language* is supported
|
|
by the engine.
|
|
|
|
For verification the functions :py:func:`EngineTraits.get_region` and
|
|
:py:func:`EngineTraits.get_language` are used.
|
|
"""
|
|
if self.data_type == 'traits_v1':
|
|
return bool(self.get_region(searxng_locale) or self.get_language(searxng_locale))
|
|
|
|
raise TypeError('engine traits of type %s is unknown' % self.data_type)
|
|
|
|
def copy(self):
|
|
"""Create a copy of the dataclass object."""
|
|
return EngineTraits(**dataclasses.asdict(self))
|
|
|
|
@classmethod
|
|
def fetch_traits(cls, engine: Engine) -> Union['EngineTraits', None]:
|
|
"""Call a function ``fetch_traits(engine_traits)`` from engines namespace to fetch
|
|
and set properties from the origin engine in the object ``engine_traits``. If
|
|
function does not exists, ``None`` is returned.
|
|
"""
|
|
|
|
fetch_traits = getattr(engine, 'fetch_traits', None)
|
|
engine_traits = None
|
|
|
|
if fetch_traits:
|
|
engine_traits = cls()
|
|
fetch_traits(engine_traits)
|
|
return engine_traits
|
|
|
|
def set_traits(self, engine: Engine):
|
|
"""Set traits from self object in a :py:obj:`.Engine` namespace.
|
|
|
|
:param engine: engine instance build by :py:func:`searx.engines.load_engine`
|
|
"""
|
|
|
|
if self.data_type == 'traits_v1':
|
|
self._set_traits_v1(engine)
|
|
else:
|
|
raise TypeError('engine traits of type %s is unknown' % self.data_type)
|
|
|
|
def _set_traits_v1(self, engine: Engine):
|
|
# For an engine, when there is `language: ...` in the YAML settings the engine
|
|
# does support only this one language (region)::
|
|
#
|
|
# - name: google italian
|
|
# engine: google
|
|
# language: it
|
|
# region: it-IT # type: ignore
|
|
|
|
traits = self.copy()
|
|
|
|
_msg = "settings.yml - engine: '%s' / %s: '%s' not supported"
|
|
|
|
languages = traits.languages
|
|
if hasattr(engine, 'language'):
|
|
if engine.language not in languages:
|
|
raise ValueError(_msg % (engine.name, 'language', engine.language))
|
|
traits.languages = {engine.language: languages[engine.language]}
|
|
|
|
regions = traits.regions
|
|
if hasattr(engine, 'region'):
|
|
if engine.region not in regions:
|
|
raise ValueError(_msg % (engine.name, 'region', engine.region))
|
|
traits.regions = {engine.region: regions[engine.region]}
|
|
|
|
engine.language_support = bool(traits.languages or traits.regions)
|
|
|
|
# set the copied & modified traits in engine's namespace
|
|
engine.traits = traits
|
|
|
|
|
|
class EngineTraitsMap(Dict[str, EngineTraits]):
|
|
"""A python dictionary to map :class:`EngineTraits` by engine name."""
|
|
|
|
ENGINE_TRAITS_FILE = (data_dir / 'engine_traits.json').resolve()
|
|
"""File with persistence of the :py:obj:`EngineTraitsMap`."""
|
|
|
|
def save_data(self):
|
|
"""Store EngineTraitsMap in in file :py:obj:`self.ENGINE_TRAITS_FILE`"""
|
|
with open(self.ENGINE_TRAITS_FILE, 'w', encoding='utf-8') as f:
|
|
json.dump(self, f, indent=2, sort_keys=True, cls=EngineTraitsEncoder)
|
|
|
|
@classmethod
|
|
def from_data(cls) -> 'EngineTraitsMap':
|
|
"""Instantiate :class:`EngineTraitsMap` object from :py:obj:`ENGINE_TRAITS`"""
|
|
obj = cls()
|
|
for k, v in ENGINE_TRAITS.items():
|
|
obj[k] = EngineTraits(**v)
|
|
return obj
|
|
|
|
@classmethod
|
|
def fetch_traits(cls, log: Callable) -> 'EngineTraitsMap':
|
|
from searx import engines # pylint: disable=cyclic-import, import-outside-toplevel
|
|
|
|
names = list(engines.engines)
|
|
names.sort()
|
|
obj = cls()
|
|
|
|
for engine_name in names:
|
|
engine = engines.engines[engine_name]
|
|
|
|
traits = EngineTraits.fetch_traits(engine)
|
|
if traits is not None:
|
|
log("%-20s: SearXNG languages --> %s " % (engine_name, len(traits.languages)))
|
|
log("%-20s: SearXNG regions --> %s" % (engine_name, len(traits.regions)))
|
|
obj[engine_name] = traits
|
|
|
|
return obj
|
|
|
|
def set_traits(self, engine: Engine | types.ModuleType):
|
|
"""Set traits in a :py:obj:`Engine` namespace.
|
|
|
|
:param engine: engine instance build by :py:func:`searx.engines.load_engine`
|
|
"""
|
|
|
|
engine_traits = EngineTraits(data_type='traits_v1')
|
|
if engine.name in self.keys():
|
|
engine_traits = self[engine.name]
|
|
|
|
elif engine.engine in self.keys():
|
|
# The key of the dictionary traits_map is the *engine name*
|
|
# configured in settings.xml. When multiple engines are configured
|
|
# in settings.yml to use the same origin engine (python module)
|
|
# these additional engines can use the languages from the origin
|
|
# engine. For this use the configured ``engine: ...`` from
|
|
# settings.yml
|
|
engine_traits = self[engine.engine]
|
|
|
|
engine_traits.set_traits(engine)
|