Standardize chat message truncation and serialization before print

Previously chatml messages were just strings, now they can be list of
strings or list of dicts as well.

- Use json seriallization to manage their variations and truncate them
  before printing for context.
- Put logic in single function for use across chat models

src/khoj/processor/conversation/anthropic/anthropic_chat.py

@@ -17,6 +17,7 @@ from khoj.processor.conversation.utils import (
     clean_json,
     construct_structured_message,
     generate_chatml_messages_with_context,
+    messages_to_print,
 )
 from khoj.utils.helpers import ConversationCommand, is_none_or_empty
 from khoj.utils.rawconfig import LocationData
@@ -214,9 +215,7 @@ def converse_anthropic(
     )
 
     messages, system_prompt = format_messages_for_anthropic(messages, system_prompt)
-
-    truncated_messages = "\n".join({f"{content[:70]}..." for message in messages for content in message.content})
-    logger.debug(f"Conversation Context for Claude: {truncated_messages}")
+    logger.debug(f"Conversation Context for Claude: {messages_to_print(messages)}")
 
     # Get Response from Claude
     return anthropic_chat_completion_with_backoff(

src/khoj/processor/conversation/google/gemini_chat.py

@@ -17,6 +17,7 @@ from khoj.processor.conversation.utils import (
     clean_json,
     construct_structured_message,
     generate_chatml_messages_with_context,
+    messages_to_print,
 )
 from khoj.utils.helpers import ConversationCommand, is_none_or_empty
 from khoj.utils.rawconfig import LocationData
@@ -225,9 +226,7 @@ def converse_gemini(
     )
 
     messages, system_prompt = format_messages_for_gemini(messages, system_prompt)
-
-    truncated_messages = "\n".join({f"{content[:70]}..." for message in messages for content in message.content})
-    logger.debug(f"Conversation Context for Gemini: {truncated_messages}")
+    logger.debug(f"Conversation Context for Gemini: {messages_to_print(messages)}")
 
     # Get Response from Google AI
     return gemini_chat_completion_with_backoff(

src/khoj/processor/conversation/offline/chat_model.py

@@ -15,6 +15,7 @@ from khoj.processor.conversation.utils import (
     ThreadedGenerator,
     commit_conversation_trace,
     generate_chatml_messages_with_context,
+    messages_to_print,
 )
 from khoj.utils import state
 from khoj.utils.constants import empty_escape_sequences
@@ -222,8 +223,7 @@ def converse_offline(
         query_files=query_files,
     )
 
-    truncated_messages = "\n".join({f"{message.content[:70]}..." for message in messages})
-    logger.debug(f"Conversation Context for {model}: {truncated_messages}")
+    logger.debug(f"Conversation Context for {model}: {messages_to_print(messages)}")
 
     g = ThreadedGenerator(references, online_results, completion_func=completion_func)
     t = Thread(target=llm_thread, args=(g, messages, offline_chat_model, max_prompt_size, tracer))

src/khoj/processor/conversation/openai/gpt.py

@@ -15,6 +15,7 @@ from khoj.processor.conversation.utils import (
     clean_json,
     construct_structured_message,
     generate_chatml_messages_with_context,
+    messages_to_print,
 )
 from khoj.utils.helpers import ConversationCommand, is_none_or_empty
 from khoj.utils.rawconfig import LocationData
@@ -212,8 +213,7 @@ def converse(
         model_type=ChatModelOptions.ModelType.OPENAI,
         query_files=query_files,
     )
-    truncated_messages = "\n".join({f"{message.content[:70]}..." for message in messages})
-    logger.debug(f"Conversation Context for GPT: {truncated_messages}")
+    logger.debug(f"Conversation Context for GPT: {messages_to_print(messages)}")
 
     # Get Response from GPT
     return chat_completion_with_backoff(

src/khoj/processor/conversation/utils.py

@@ -736,3 +736,10 @@ Metadata
     except Exception as e:
         logger.error(f"Failed to merge message {msg_branch} into conversation {conv_branch}: {str(e)}", exc_info=True)
         return False
+
+
+def messages_to_print(messages: list[ChatMessage], max_length: int = 70) -> str:
+    """
+    Format, truncate messages to print
+    """
+    return "\n".join([f"{json.dumps(message.content)[:max_length]}..." for message in messages])