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# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""Implement request processores used by engine-types.
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"""
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__all__ = [
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'EngineProcessor',
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'OfflineProcessor',
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'OnlineProcessor',
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'OnlineDictionaryProcessor',
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'OnlineCurrencyProcessor',
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'OnlineUrlSearchProcessor',
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'PROCESSORS',
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]
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import threading
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from typing import Dict
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from searx import logger
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from searx import engines
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from .online import OnlineProcessor
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from .offline import OfflineProcessor
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from .online_dictionary import OnlineDictionaryProcessor
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from .online_currency import OnlineCurrencyProcessor
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from .online_url_search import OnlineUrlSearchProcessor
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from .abstract import EngineProcessor
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logger = logger.getChild('search.processors')
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PROCESSORS: Dict[str, EngineProcessor] = {}
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"""Cache request processores, stored by *engine-name* (:py:func:`initialize`)"""
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def get_processor_class(engine_type):
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"""Return processor class according to the ``engine_type``"""
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for c in [
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OnlineProcessor,
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OfflineProcessor,
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OnlineDictionaryProcessor,
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OnlineCurrencyProcessor,
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OnlineUrlSearchProcessor,
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]:
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if c.engine_type == engine_type:
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return c
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return None
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def get_processor(engine, engine_name):
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"""Return processor instance that fits to ``engine.engine.type``)"""
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engine_type = getattr(engine, 'engine_type', 'online')
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processor_class = get_processor_class(engine_type)
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if processor_class:
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return processor_class(engine, engine_name)
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return None
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def initialize_processor(processor):
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"""Initialize one processor
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Call the init function of the engine
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"""
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if processor.has_initialize_function:
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t = threading.Thread(target=processor.initialize, daemon=True)
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t.start()
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def initialize(engine_list):
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"""Initialize all engines and store a processor for each engine in :py:obj:`PROCESSORS`."""
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for engine_data in engine_list:
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engine_name = engine_data['name']
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engine = engines.engines.get(engine_name)
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if engine:
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processor = get_processor(engine, engine_name)
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initialize_processor(processor)
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if processor is None:
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engine.logger.error('Error get processor for engine %s', engine_name)
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else:
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PROCESSORS[engine_name] = processor
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