Merge branch 'main' into tool-use

application/utils.py

@@ -58,3 +58,40 @@ def check_required_fields(data, required_fields):
 def get_hash(data):
     return hashlib.md5(data.encode()).hexdigest()
 
+def limit_chat_history(history, max_token_limit=None, gpt_model="docsgpt"):
+    """
+    Limits chat history based on token count.
+    Returns a list of messages that fit within the token limit.
+    """
+    from application.core.settings import settings
+
+    max_token_limit = (
+            max_token_limit
+            if max_token_limit and 
+            max_token_limit < settings.MODEL_TOKEN_LIMITS.get(
+                gpt_model, settings.DEFAULT_MAX_HISTORY
+            )
+            else settings.MODEL_TOKEN_LIMITS.get(
+                gpt_model, settings.DEFAULT_MAX_HISTORY
+            )
+        )
+    
+
+    if not history:
+        return []
+        
+    tokens_current_history = 0
+    trimmed_history = []
+    
+    for message in reversed(history):
+        if "prompt" in message and "response" in message:
+            tokens_batch = num_tokens_from_string(message["prompt"]) + num_tokens_from_string(
+                message["response"]
+            )
+            if tokens_current_history + tokens_batch < max_token_limit:
+                tokens_current_history += tokens_batch
+                trimmed_history.insert(0, message)
+            else:
+                break
+
+    return trimmed_history