from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(50), unique=True, nullable=False)
    password = db.Column(db.String(255), nullable=False)
    user_type = db.Column(db.String(20), nullable=False)

class Resource(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    type = db.Column(db.String(50), nullable=False)
    institution = db.Column(db.String(100), nullable=False)
    department = db.Column(db.String(100), nullable=False)
    resource_file = db.Column(db.String(255), nullable=False)