[enh] engine: rework lingva

lingva.thedaviddelta.com instance is dead, use lingva.ml

2 files changed, 73 insertions, 50 deletions

diff --git a/searx/engines/lingva.py b/searx/engines/lingva.py
index 156e37d89..c0ca14b10 100644
--- a/searx/engines/lingva.py
+++ b/searx/engines/lingva.py
@@ -1,74 +1,96 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
-"""Lingva (alternative Google Translate frontend)"""
+"""`Lingva Translate`_ is an alternative front-end for Google Translate,
+serving as a free and open source translator with over a hundred
+languages available.
+
+.. _Lingva Translate: https://github.com/thedaviddelta/lingva-translate
+"""
+
+import typing as t
 
 from searx.result_types import EngineResults
 
-about = {
-    "website": 'https://lingva.ml',
+if t.TYPE_CHECKING:
+    from searx.extended_types import SXNG_Response
+    from searx.search.processors.online_dictionary import OnlineDictParams
+
+about: dict[str, t.Any] = {
+    "website": "https://github.com/thedaviddelta/lingva-translate",
     "wikidata_id": None,
-    "official_api_documentation": 'https://github.com/thedaviddelta/lingva-translate#public-apis',
+    "official_api_documentation": "https://github.com/thedaviddelta/lingva-translate#public-apis",
     "use_official_api": True,
     "require_api_key": False,
-    "results": 'JSON',
+    "results": "JSON",
 }
 
-engine_type = 'online_dictionary'
-categories = ['general', 'translate']
+categories: list[str] = ["general", "translate"]
+engine_type = "online_dictionary"
+
+base_url = "https://lingva.ml"
+
 
-url = "https://lingva.thedaviddelta.com"
+def request(_query: str, params: "OnlineDictParams") -> None:
+    from_lang = params["from_lang"][1]
+    to_lang = params["to_lang"][1]
+    query = params["query"]
 
+    params["url"] = f"{base_url}/api/v1/{from_lang}/{to_lang}/{query}"
 
-def request(_query, params):
-    params['url'] = f"{url}/api/v1/{params['from_lang'][1]}/{params['to_lang'][1]}/{params['query']}"
-    return params
 
+def response(resp: "SXNG_Response") -> EngineResults:
+    res = EngineResults()
+    json_resp = resp.json()
 
-def response(resp) -> EngineResults:
-    results = EngineResults()
+    params: "OnlineDictParams" = resp.search_params  # type: ignore[assignment]
+    from_lang = params["from_lang"][1]
+    to_lang = params["to_lang"][1]
+    query = params["query"]
 
-    result = resp.json()
-    info = result["info"]
-    from_to_prefix = "%s-%s " % (resp.search_params['from_lang'][1], resp.search_params['to_lang'][1])
+    translation = json_resp.get("translation")
+    if not translation:
+        return res
 
-    if "typo" in info:
-        results.append({"suggestion": from_to_prefix + info["typo"]})
+    info: dict[str, t.Any] | None = json_resp.get("info")
 
-    if 'definitions' in info:  # pylint: disable=too-many-nested-blocks
-        for definition in info['definitions']:
-            for item in definition.get('list', []):
-                for synonym in item.get('synonyms', []):
-                    results.append({"suggestion": from_to_prefix + synonym})
+    from_to_prefix = f"{from_lang}-{to_lang} "
 
-    data = []
+    translations: list[EngineResults.types.Translations.Item] = []
 
-    for definition in info['definitions']:
-        for translation in definition['list']:
-            data.append(
-                results.types.Translations.Item(
-                    text=result['translation'],
-                    definitions=[translation['definition']] if translation['definition'] else [],
-                    examples=[translation['example']] if translation['example'] else [],
-                    synonyms=translation['synonyms'],
+    if info:
+        if "typo" in info:
+            res.add(res.types.LegacyResult(suggestion=from_to_prefix + info["typo"]))
+
+        for definition in info.get("definitions", []):
+            for item in definition.get("list", []):
+                for synonym in item.get("synonyms", []):
+                    res.add(res.types.LegacyResult(suggestion=from_to_prefix + synonym))
+
+                translations.append(
+                    EngineResults.types.Translations.Item(
+                        text=translation,
+                        definitions=[item["definition"]] if item.get("definition") else [],
+                        examples=[item["example"]] if item.get("example") else [],
+                        synonyms=item.get("synonyms", []),
+                    )
                 )
-            )
-
-    for translation in info["extraTranslations"]:
-        for word in translation["list"]:
-            data.append(
-                results.types.Translations.Item(
-                    text=word['word'],
-                    definitions=word['meanings'],
+
+        for extra_translation in info.get("extraTranslations", []):
+            for word in extra_translation.get("list", []):
+                translations.append(
+                    EngineResults.types.Translations.Item(
+                        text=word["word"],
+                        definitions=word.get("meanings", []),
+                    )
                 )
-            )
 
-    if not data and result['translation']:
-        data.append(results.types.Translations.Item(text=result['translation']))
+    if not translations:
+        translations.append(EngineResults.types.Translations.Item(text=translation))
 
-    params = resp.search_params
-    results.add(
-        results.types.Translations(
-            translations=data,
-            url=f"{url}/{params['from_lang'][1]}/{params['to_lang'][1]}/{params['query']}",
+    res.add(
+        res.types.Translations(
+            translations=translations,
+            url=f"{base_url}/{from_lang}/{to_lang}/{query}",
         )
     )
-    return results
+
+    return res
diff --git a/searx/settings.yml b/searx/settings.yml
index 225cdfed1..eff8839d2 100644
--- a/searx/settings.yml
+++ b/searx/settings.yml
@@ -1310,8 +1310,9 @@ engines:
   - name: lingva
     engine: lingva
     shortcut: lv
+    timeout: 6.0
     # set lingva instance in url, by default it will use the official instance
-    # url: https://lingva.thedaviddelta.com
+    # url: https://lingva.ml
 
   - name: lobste.rs
     engine: xpath