import hashlib

# Using a hash function to generate fingerprint

def generate_fingerprint(author_data, formula_data):

data_string = f"{author_data}{formula_data}"

fingerprint = hashlib.sha256(data_string.encode()).hexdigest()

return fingerprint

def check_fingerprint_data(fingerprint_data, db, ExcelFile):

suspicious_files = {}

fingerprint_to_file = {}

# Iterate through all the files

for file_id, data in fingerprint_data.items():

file_name = data["author_data"]["file_name"]

# Generate the fingerprint for each file

fingerprint = generate_fingerprint(data['author_data'], data['formula_data'])

# If fingerprint is found already in the dictionary then flag that file

if fingerprint in fingerprint_to_file:

# Flag the current file and the file to which it was matched with into the set

matched_file = fingerprint_to_file[fingerprint]

matched_file_name = fingerprint_data[matched_file]["author_data"]["file_name"]

try:

excel_file = db.session.query(ExcelFile).filter_by(id=file_id).first()

matched_excel_file = db.session.query(ExcelFile).filter_by(id=matched_file).first()

if file_id not in fingerprint_to_file:

suspicious_files[file_id] = ("fingerprint", f"Matched Fingerprint With:{matched_file_name}", 3)

if excel_file:

excel_file.fingerprint_results = suspicious_files[file_id]

db.session.commit()

if matched_file not in suspicious_files:

suspicious_files[matched_file] = ("fingerprint", f"Matched Fingerprint With:{file_name}", 3)

if matched_excel_file:

matched_excel_file.fingerprint_results = suspicious_files[matched_file]

db.session.commit()

except Exception as e:

db.session.rollback()

print("Error updating excel file fingerprint data results attribute:", e)

else:

# Otherwise add that unique fingerprint and associated file_id to the dictionary

fingerprint_to_file[fingerprint] = file_id

return suspicious_files