Add PDF upload to BlindChat

[dhuynh95]

Add a button on the Chat UI to load PDFs on the client side for future RAG integration

[aquilu]

Action Plan for Integrating PDF Processing in BlindChat

1. Text Extraction from PDF

• Use a client-side library to extract text from PDF files. This ensures that the PDF content never leaves the user's device.
• JavaScript-based libraries like pdf.js are recommended for this task.

2. Vectorization and Embedding Creation

• Once the text has been extracted, use a natural language processing model to convert the text into embeddings.
• For this, one can use TensorFlow.js and pretrained models available on the platform, or consider using specific libraries that offer embeddings in the browser.
• It's crucial to consider model efficiency and size to ensure a good user experience.

3. Integration with BlindChat

• Add an option in BlindChat for users to upload PDF files.
• Process the PDF and convert the extracted text into embeddings.
• Use these embeddings based on BlindChat functionalities. For example, for searching relevant information, comparing embeddings, etc.

4. Privacy and Security Considerations

• Ensure that all processing is done on the client-side to maintain privacy.
• Do not permanently store embeddings or text in the browser to ensure there are no security risks.