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| from fastapi import UploadFile, File | |
| import bcrypt | |
| import os | |
| import shutil | |
| from utils.chat_rag import sanitize_collection_name | |
| from utils.ec_image_utils import get_user_cropped_image_from_photo | |
| # Import vector store for database operations | |
| from langchain_community.vectorstores import Chroma | |
| # Import embeddings module from langchain for vector representations of text | |
| from langchain_community.embeddings import HuggingFaceEmbeddings | |
| # Registrering a face | |
| async def register_user(db, email: str, name: str, role: str, file: UploadFile = File(...)): | |
| """ | |
| Processes and stores the image uploaded into vectordb as image embeddings. | |
| :param db: The vector db collection handle to which the image embedding with email id as key will be upserted | |
| :param email: The email id of the user being registered, this is assumed to be unique per user record | |
| :param name: The user name (different from email) for display | |
| :param role: The role associated with the user, it can only be student or teacher | |
| :param file: The facial image of the user being registered, the first recognized face image would be used. | |
| :return: email | |
| """ | |
| unique_filename = f"{email}.jpg" # Use the email as the filename | |
| file_path = f"/home/user/data/tmp/{unique_filename}" # Specify our upload directory | |
| # Ensure the directory exists | |
| os.makedirs(os.path.dirname(file_path), exist_ok=True) | |
| # Then, proceed to open the file | |
| with open(file_path, "wb") as buffer: | |
| contents = await file.read() | |
| buffer.write(contents) | |
| # Process the image to extract the face | |
| cropped_face = get_user_cropped_image_from_photo(file_path) | |
| os.remove(file_path) # Remove the file after processing, PDPA. | |
| if cropped_face is not None: | |
| # Here we can store the embeddings along with user details in ChromaDB | |
| # chroma_db.save_embeddings(user_id, embeddings) | |
| db.upsert(images=[cropped_face], ids=[email], metadatas=[{"name":name, "role":role}]) | |
| return {"status": "User registered successfully", "image": cropped_face} | |
| else: | |
| return {"error": "No faces detected"} | |
| # Admin Authentication | |
| def verify_admin_password(submitted_user: str, submitted_password: str) -> bool: | |
| """ | |
| Verifies the submitted password against the stored hash. | |
| :param submitted_user: The username submitted by the user. | |
| :param submitted_password: The password submitted by the user. | |
| :return: True if the password is correct, False otherwise. | |
| """ | |
| if submitted_user == "admin": | |
| # Retrieve the stored hash from environment variable | |
| stored_password_hash = os.getenv("EC_ADMIN_PWD", "").encode('utf-8') | |
| print(stored_password_hash) | |
| # Directly compare the submitted password with the stored hash | |
| return bcrypt.checkpw(submitted_password.encode('utf-8'), stored_password_hash) | |
| return False | |
| # Get disk usage | |
| def get_disk_usage(path="/home/user/data"): | |
| total, used, free = shutil.disk_usage(path) | |
| # Convert bytes to MB by dividing by 2^20 | |
| return { | |
| "total": total / (2**20), | |
| "used": used / (2**20), | |
| "free": free / (2**20) | |
| } | |
| # Additional Admin Functions | |
| # we could include other administrative functionalities here, such as: | |
| # - Listing all registered users. | |
| # - Moderating chat messages or viewing chat history. | |
| # - Managing system settings or configurations. | |
| # Display all faces in collection | |
| def faces_count(client, db): | |
| return { | |
| "face_count" : db.count(), | |
| "all_faces" : db.get(), | |
| "all_collections" : client.list_collections() # List all collections at this location | |
| } | |
| # Delete all faces in collection | |
| def remove_all_faces(client, user_faces_collection="user_faces_db"): | |
| # Fetch all user IDs from the user_faces_db collection | |
| all_user_ids = client.get_all_ids(collection_name=user_faces_collection) | |
| CHROMADB_LOC = os.getenv('CHROMADB_LOC') | |
| # Loop through all user IDs and delete associated collections | |
| for user_id in all_user_ids: | |
| sanitized_collection_name = sanitize_collection_name(user_id) | |
| vectordb = Chroma( | |
| collection_name=sanitized_collection_name, | |
| embedding_function=HuggingFaceEmbeddings(model_name='sentence-transformers/all-MiniLM-L6-v2'), | |
| persist_directory=f"{CHROMADB_LOC}/{sanitized_collection_name}", # Optional: Separate directory for each user's data | |
| ) | |
| all_ids = vectordb._collection.get() | |
| vectordb._collection.delete(ids=all_ids) | |
| # Finally, delete the user_faces_db collection itself | |
| client.delete_collection(user_faces_collection) | |
| print(f"All user collections and {user_faces_collection} have been removed.") | |