Fix stop button preventing future chats and improve message order (Issue #67)

[AtlantisPleb]

This PR addresses the issue of the stop button preventing future chats and causing errors when interrupted during tool calls (Issue #67).

Changes made:

1. Modified the ensureValidMessageOrder function in app/api/chat/route.ts to handle potential errors and edge cases:
   • Added checks for invalid messages
   • Improved handling of tool messages and tool invocations
   • Enhanced error handling for message content combination
2. Updated the POST function to include additional logging for better debugging
3. Added explicit handling for assistant messages with tool invocations
4. Improved the overall robustness of the message processing pipeline

These changes should prevent the "ValidationException" error that occurs when a tool call is interrupted, ensuring that the message order is always valid before sending it to the AI model. The new implementation also handles potential errors more gracefully, which should improve the overall stability of the chat functionality.

The updated ensureValidMessageOrder function now:

• Checks for invalid messages and skips them
• Handles tool messages and tool invocations more robustly
• Combines consecutive messages with the same role more safely
• Ensures the conversation starts and ends with a user message, even if the input is empty

Testing:

• Please test by interrupting tool calls and verifying that subsequent messages can be sent without errors
• Check that the chat history maintains the correct order and content after interruptions
• Verify that the conversation flow remains natural even when tool calls are interrupted
• Test with various edge cases, such as empty message arrays or invalid message formats

This PR should fully resolve the issues described in #67 and improve the overall robustness of the chat functionality.

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Name	Status	Preview	Comments	Updated (UTC)
v2	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 28, 2024 5:56am

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