feat: 消息截断器

pkg/pipeline/msgtrun/truncators/round.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+from .. import truncator
+from ....core import entities as core_entities
+
+
+@truncator.truncator_class("round")
+class RoundTruncator(truncator.Truncator):
+    """前文回合数阶段器
+    """
+
+    async def truncate(self, query: core_entities.Query) -> core_entities.Query:
+        """截断
+        """
+        max_round = self.ap.pipeline_cfg.data['msg-truncate']['round']['max-round']
+
+        temp_messages = []
+
+        current_round = 0
+
+        # 从后往前遍历
+        for msg in query.messages[::-1]:
+            if current_round < max_round:
+                temp_messages.append(msg)
+                if msg.role == 'user':
+                    current_round += 1
+            else:
+                break
+        
+        query.messages = temp_messages[::-1]
+
+        return query