[refactor] typification of SearXNG / EngineResults

In [1] and [2] we discussed the need of a Result.results property and how we can
avoid unclear code.  This patch implements a class for the reslut-lists of
engines::

    searx.result_types.EngineResults

A simple example for the usage in engine development::

    from searx.result_types import EngineResults
    ...
    def response(resp) -> EngineResults:
        res = EngineResults()
        ...
        res.add( res.types.Answer(answer="lorem ipsum ..", url="https://example.org") )
        ...
        return res

[1] https://github.com/searxng/searxng/pull/4183#pullrequestreview-257400034
[2] https://github.com/searxng/searxng/pull/4183#issuecomment-2614301580
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

1 files changed, 5 insertions, 5 deletions

diff --git a/searx/engines/libretranslate.py b/searx/engines/libretranslate.py
index 2e6663cb0..b9b8c7165 100644
--- a/searx/engines/libretranslate.py
+++ b/searx/engines/libretranslate.py
@@ -3,7 +3,7 @@
 
 import random
 import json
-from searx.result_types import Translations
+from searx.result_types import EngineResults
 
 about = {
     "website": 'https://libretranslate.com',
@@ -45,15 +45,15 @@ def request(_query, params):
     return params
 
 
-def response(resp):
-    results = []
+def response(resp) -> EngineResults:
+    results = EngineResults()
 
     json_resp = resp.json()
     text = json_resp.get('translatedText')
     if not text:
         return results
 
-    item = Translations.Item(text=text, examples=json_resp.get('alternatives', []))
-    Translations(results=results, translations=[item])
+    item = results.types.Translations.Item(text=text, examples=json_resp.get('alternatives', []))
+    results.add(results.types.Translations(translations=[item]))
 
     return results