import time
import random
from src.utils.logging_config import logger

def is_text_pdf(pdf_path):
    import fitz
    doc = fitz.open(pdf_path)
    for page_num in range(len(doc)):
        page = doc.load_page(page_num)
        text = page.get_text()
        if text.strip():  # 检查是否有文本内容
            return True
    return False

def hashstr(input_string, length=8, with_salt=False):
    import hashlib
    # 添加时间戳作为干扰
    if with_salt:
        input_string += str(time.time() + random.random())

    hash = hashlib.md5(str(input_string).encode()).hexdigest()
    return hash[:length]