restrict base results in near search by rank

[nominatim.git] / nominatim / api / search / query_analyzer_factory.py

diff --git a/nominatim/api/search/query_analyzer_factory.py b/nominatim/api/search/query_analyzer_factory.py
index 9804f3ce8a1129b7a3b7699425e94ba4017f4592..bbc1eb6b1d787c483fc8086912279afda0a53b1a 100644 (file)
--- a/nominatim/api/search/query_analyzer_factory.py
+++ b/nominatim/api/search/query_analyzer_factory.py
@@ -7,14 +7,16 @@
 """
 Factory for creating a query analyzer for the configured tokenizer.
 """
 """
 Factory for creating a query analyzer for the configured tokenizer.
 """

-from typing import List, cast
+from typing import List, cast, TYPE_CHECKING

 from abc import ABC, abstractmethod
 from pathlib import Path
 import importlib
 
 from nominatim.api.logging import log
 from nominatim.api.connection import SearchConnection
 from abc import ABC, abstractmethod
 from pathlib import Path
 import importlib
 
 from nominatim.api.logging import log
 from nominatim.api.connection import SearchConnection

-from nominatim.api.search.query import Phrase, QueryStruct
+
+if TYPE_CHECKING:
+    from nominatim.api.search.query import Phrase, QueryStruct

 
 class AbstractQueryAnalyzer(ABC):
     """ Class for analysing incomming queries.
 
 class AbstractQueryAnalyzer(ABC):
     """ Class for analysing incomming queries.


@@ -23,11 +25,20 @@ class AbstractQueryAnalyzer(ABC):
     """
 
     @abstractmethod
     """
 
     @abstractmethod

-    async def analyze_query(self, phrases: List[Phrase]) -> QueryStruct:
+    async def analyze_query(self, phrases: List['Phrase']) -> 'QueryStruct':

         """ Analyze the given phrases and return the tokenized query.
         """
 
 
         """ Analyze the given phrases and return the tokenized query.
         """
 
 

+    @abstractmethod
+    def normalize_text(self, text: str) -> str:
+        """ Bring the given text into a normalized form. That is the
+            standardized form search will work with. All information removed
+            at this stage is inevitably lost.
+        """
+
+
+

 async def make_query_analyzer(conn: SearchConnection) -> AbstractQueryAnalyzer:
     """ Create a query analyzer for the tokenizer used by the database.
     """
 async def make_query_analyzer(conn: SearchConnection) -> AbstractQueryAnalyzer:
     """ Create a query analyzer for the tokenizer used by the database.
     """