implement source and lang keywords for full text search

tubearchivist/home/src/frontend/searching.py

@@ -252,6 +252,8 @@ class SearchParser:
             "full": {
                 "index": "ta_subtitle",
                 "term": [],
+                "lang": [],
+                "source": [],
             },
         }
 
@@ -481,6 +483,14 @@ class QueryBuilder:
                 }
             )
 
+        if (lang := self.query_map.get("lang")) is not None:
+            must_list.append({"term": {"subtitle_lang": {"value": lang[0]}}})
+
+        if (source := self.query_map.get("source")) is not None:
+            must_list.append(
+                {"term": {"subtitle_source": {"value": source[0]}}}
+            )
+
         query = {
             "size": 30,
             "_source": {"excludes": "subtitle_line"},