How can I implement access control using TypeScript decorators?

How can I implement access control using TypeScript decorators?

You can implement access control in TypeScript using decorators by creating a custom decorator that checks user permissions.

Can you show me a simple example of such a decorator?

Sure! Here's a basic example:

function AccessControl(roles: string[]) {
    return function(target: any, propertyKey: string, descriptor: PropertyDescriptor) {
        const originalMethod = descriptor.value;
        descriptor.value = function(...args: any[]) {
            const userRole = getUserRole(); // Assume this function gets the current user's role
            if (!roles.includes(userRole)) {
                throw new Error('Access denied');
            }
            return originalMethod.apply(this, args);
        };
    };
}

How do I use this decorator on a method?

You can use the decorator like this:

class UserService {
    @AccessControl(['admin', 'editor'])
    updateUser(userId: number, userData: any) {
        // Update user logic here
    }
}