Angular 2 How to Apply Multiple Guards with Or-Relationship on the Same Path

Question

My application allows access to contents based on user roles. I wrote a Router Guard for each role. Some contents allow access for role1 or role2 or role3. How should I write that canActivate declaration in the feature-routing.module.ts file? As I understand, if I write

canActivate:[Role1Guard, Role2Guard, Role3Guard]

The access will be denied if any of the guards returns false. But in my case, I should allow access if any of the guards returns true. How to do it? Many thanks in advance!

Answer 1

What we can do in this case is create a Master Guard which will trigger the application guards as per our requirement.

Checkout this answer to understand the approach.

Assuming you have gone through it above link, the approach in this case could be as simple as modifying the data property in Route class.

Something like this -

{
    path: "view2",
    component: View2Component,
    //attach master guard here
    canActivate: [MasterGuard],
    //this is the data object which will be used by 
    //masteer guard to execute guard1, guard 2, guard 3 & guard 4
    data: {
        trigger: {
            operator: "OR",
            guards: [
                GUARDS.GUARD1,
                GUARDS.GUARD2,
                GUARDS.GUARD3,
                GUARDS.GUARD4
            ]
        }
    }
}

And then use operator flag to fire all guards accordingly.

I hope this helps :)