[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/online_dictionary.py

@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+import re
+
+from searx.utils import is_valid_lang
+from .online import OnlineProcessor
+
+
+parser_re = re.compile('.*?([a-z]+)-([a-z]+) ([^ ]+)$', re.I)
+
+
+class OnlineDictionaryProcessor(OnlineProcessor):
+
+    engine_type = 'online_dictionnary'
+
+    def get_params(self, search_query, engine_category):
+        params = super().get_params(search_query, engine_category)
+        if params is None:
+            return None
+
+        m = parser_re.match(search_query.query)
+        if not m:
+            return None
+
+        from_lang, to_lang, query = m.groups()
+
+        from_lang = is_valid_lang(from_lang)
+        to_lang = is_valid_lang(to_lang)
+
+        if not from_lang or not to_lang:
+            return None
+
+        params['from_lang'] = from_lang
+        params['to_lang'] = to_lang
+        params['query'] = query
+
+        return params