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from flask import Flask, request, jsonify
import datetime

app = Flask(__name__)

# 模拟学员数据库
students = {
    'Alice': {'last_checked_in': None},
    'Bob': {'last_checked_in': None},
    # ... 其他学员
}

@app.route('/checkin', methods=['POST'])
def checkin():
    data = request.json
    student_name = data.get('name')
    
    if student_name in students:
        students[student_name]['last_checked_in'] = datetime.datetime.now()
        return jsonify({'status': 'success', 'message': '签到成功！'})
    else:
        return jsonify({'status': 'error', 'message': '学员不存在！'})

@app.route('/status/<string:name>', methods=['GET'])
def get_status(name):
    if name in students:
        last_checked_in = students[name]['last_checked_in']
        return jsonify({
            'name': name,
            'last_checked_in': last_checked_in.strftime('%Y-%m-%d %H:%M:%S') if last_checked_in else '从未签到'
        })
    else:
        return jsonify({'status': 'error', 'message': '学员不存在！'})

if __name__ == '__main__':
    app.run(debug=True)