[mod] split searx.search into different processors

see searx.search.processors.abstract.EngineProcessor

First the method searx call the get_params method.

If the return value is not None, then the searx call the method search.

searx/search/processors/abstract.py

@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+from abc import abstractmethod
+from searx import logger
+
+
+logger = logger.getChild('searx.search.processor')
+
+
+class EngineProcessor:
+
+    def __init__(self, engine, engine_name):
+        self.engine = engine
+        self.engine_name = engine_name
+
+    def get_params(self, search_query, engine_category):
+        # if paging is not supported, skip
+        if search_query.pageno > 1 and not self.engine.paging:
+            return None
+
+        # if time_range is not supported, skip
+        if search_query.time_range and not self.engine.time_range_support:
+            return None
+
+        params = {}
+        params['category'] = engine_category
+        params['pageno'] = search_query.pageno
+        params['safesearch'] = search_query.safesearch
+        params['time_range'] = search_query.time_range
+
+        if hasattr(self.engine, 'language') and self.engine.language:
+            params['language'] = self.engine.language
+        else:
+            params['language'] = search_query.lang
+        return params
+
+    @abstractmethod
+    def search(self, query, params, result_container, start_time, timeout_limit):
+        pass