[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/plugins/self_info.py b/searx/plugins/self_info.py
index d1d7f12b9..f5498e480 100644
--- a/searx/plugins/self_info.py
+++ b/searx/plugins/self_info.py
@@ -7,7 +7,7 @@ import re
 from flask_babel import gettext
 
 from searx.botdetection._helpers import get_real_ip
-from searx.result_types import Answer
+from searx.result_types import EngineResults
 
 from . import Plugin, PluginInfo
 
@@ -41,17 +41,17 @@ class SXNGPlugin(Plugin):
             preference_section="query",
         )
 
-    def post_search(self, request: "SXNG_Request", search: "SearchWithPlugins") -> list[Answer]:
+    def post_search(self, request: "SXNG_Request", search: "SearchWithPlugins") -> EngineResults:
         """Returns a result list only for the first page."""
-        results = []
+        results = EngineResults()
 
         if search.search_query.pageno > 1:
             return results
 
         if self.ip_regex.search(search.search_query.query):
-            Answer(results=results, answer=gettext("Your IP is: ") + get_real_ip(request))
+            results.add(results.types.Answer(answer=gettext("Your IP is: ") + get_real_ip(request)))
 
         if self.ua_regex.match(search.search_query.query):
-            Answer(results=results, answer=gettext("Your user-agent is: ") + str(request.user_agent))
+            results.add(results.types.Answer(answer=gettext("Your user-agent is: ") + str(request.user_agent)))
 
         return results