import json
import os

FILE_NAME = "quotes.json"

def load_user_quotes():
    """Load user-submitted quotes from a local file."""
    if not os.path.exists(FILE_NAME):
        return []
    with open(FILE_NAME, "r") as f:
        return json.load(f)

def save_user_quote(quote, author):
    """Save a new user quote in the local file."""
    data = load_user_quotes()
    data.append({"quote": quote, "author": author, "upvotes": 0})
    
    with open(FILE_NAME, "w") as f:
        json.dump(data, f)

def upvote_quote(index):
    """Increment upvote count for a quote."""
    data = load_user_quotes()
    if 0 <= index < len(data):
        data[index]["upvotes"] += 1

    with open(FILE_NAME, "w") as f:
        json.dump(data, f)