1 files changed, 21 insertions, 0 deletions
diff --git a/rag/retriever/rerank/local.py b/rag/retriever/rerank/local.py
index 75fedd8..8e94882 100644
--- a/rag/retriever/rerank/local.py
+++ b/rag/retriever/rerank/local.py
@@ -1,9 +1,11 @@
 import os
+from typing import List
 
 from loguru import logger as log
 from sentence_transformers import CrossEncoder
 
 from rag.generator.prompt import Prompt
+from rag.retriever.memory import Log
 from rag.retriever.rerank.abstract import AbstractReranker
 
 
@@ -33,3 +35,22 @@ class Reranker(metaclass=AbstractReranker):
                 prompt.documents[r.get("corpus_id", 0)] for r in ranking
             ]
         return prompt
+
+    def rank_memory(self, prompt: Prompt, history: List[Log]) -> List[Log]:
+        if history:
+            results = self.model.rank(
+                query=prompt.query,
+                documents=[m.bot.message for m in history],
+                return_documents=False,
+                top_k=self.top_k,
+            )
+            ranking = list(
+                filter(
+                    lambda x: x.get("score", 0.0) > self.relevance_threshold, results
+                )
+            )
+            log.debug(
+                f"Reranking gave {len(ranking)} relevant messages of {len(history)}"
+            )
+            history = [history[r.get("corpus_id", 0)] for r in ranking]
+        return history