from queue import Empty

from flask import Blueprint, jsonify

from config import JSON_TASK_QUEUE


communication_bp = Blueprint('communication', __name__)


@communication_bp.route('/api/amazon/del_brand', methods=['GET', 'POST'])
def del_brand():
    """返回队列中的一个元素；队列为空时返回空提示。"""
    try:
        item = JSON_TASK_QUEUE.get_nowait()
        return jsonify({'success': True, 'data': item})
    except Empty:
        return jsonify({'success': False, 'message': '队列为空', 'data': None})