improvement(chat): add the ability to download files from the deployed chat

[aadamgough]

Summary

Adding ability to download files from deployed chat. Also added file download for microsoft teams

Type of Change

• New feature

Testing

Tested manually with gmail, slack, teams, outlook, drive, onedrive

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
docs	Skipped			Dec 10, 2025 6:01am

[greptile-apps]

Greptile Overview

Greptile Summary

This PR adds file download functionality to deployed chat interfaces and Microsoft Teams integration. The implementation includes:

• New ChatFileDownload component with individual file download cards showing file icons, names, and sizes
• ChatFileDownloadAll button to download multiple files sequentially with 150ms delay between downloads
• File extraction logic in chat streaming hook that recursively finds UserFile objects in block outputs
• Microsoft Teams support for downloading both hosted contents and SharePoint/OneDrive reference attachments
• Proper error handling with fallback to opening files in new tabs

The feature integrates cleanly with existing chat message display, includes deduplication for files, and follows the codebase patterns for error handling and logging.

Confidence Score: 4/5

• This PR is safe to merge with one minor style improvement suggested
• The implementation is well-structured with proper error handling, deduplication logic, and follows existing patterns. The file download functionality includes appropriate fallbacks, the Teams integration correctly handles both hosted and reference attachments, and the streaming hook properly extracts files. One minor style improvement was suggested to simplify URL logic, but this doesn't affect functionality.
• No files require special attention - the suggested style improvement in file-download.tsx is optional

Important Files Changed

File Analysis

Filename	Score	Overview
apps/sim/app/chat/components/message/components/file-download.tsx	4/5	New component for downloading files from chat messages with proper error handling
apps/sim/app/chat/hooks/use-chat-streaming.ts	5/5	Added file extraction logic from streaming responses with deduplication
apps/sim/tools/microsoft_teams/utils.ts	5/5	Added functions to download SharePoint/OneDrive reference attachments via Microsoft Graph API

Sequence Diagram

sequenceDiagram
    participant User
    participant ChatUI as Chat UI
    participant ChatFileDownload
    participant StreamHook as useChatStreaming
    participant API as /api/chat/stream
    participant BlockExecutor
    participant TeamsTools as MS Teams Tools
    participant GraphAPI as Microsoft Graph API

    User->>ChatUI: Send message
    ChatUI->>API: POST with outputConfigs
    API->>BlockExecutor: Execute blocks
    
    alt Microsoft Teams Block
        BlockExecutor->>TeamsTools: read_channel/read_chat (includeAttachments=true)
        TeamsTools->>GraphAPI: Fetch messages
        GraphAPI-->>TeamsTools: Messages with attachments
        TeamsTools->>GraphAPI: Download hosted contents
        TeamsTools->>GraphAPI: Download reference attachments (SharePoint/OneDrive)
        GraphAPI-->>TeamsTools: File data (base64)
        TeamsTools-->>BlockExecutor: Return with attachments array
    end
    
    BlockExecutor-->>API: Stream chunks + final data
    API-->>StreamHook: SSE stream with block outputs
    
    StreamHook->>StreamHook: extractFilesFromData()
    StreamHook->>StreamHook: Check isUserFile & deduplicate
    StreamHook->>ChatUI: Update message with files array
    
    ChatUI->>ChatFileDownload: Render file cards
    
    User->>ChatFileDownload: Click download button
    ChatFileDownload->>ChatFileDownload: getFileUrl()
    ChatFileDownload->>API: fetch(file.url or /api/files/serve)
    API-->>ChatFileDownload: File blob
    ChatFileDownload->>ChatFileDownload: Create blob URL
    ChatFileDownload->>User: Trigger browser download

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[icecrasher321]

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