Enforce AppProject with clusterResourceBlacklist

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: appproject-clusterresourceblacklist
  annotations:
    policies.kyverno.io/title: Enforce AppProject with clusterResourceBlacklist
    policies.kyverno.io/category: Argo
    policies.kyverno.io/severity: medium
    kyverno.io/kyverno-version: 1.6.2
    policies.kyverno.io/minversion: 1.6.0
    kyverno.io/kubernetes-version: "1.23"
    policies.kyverno.io/subject: AppProject
    policies.kyverno.io/description: An AppProject may optionally specify clusterResourceBlacklist which is a blacklisted group of cluster resources. This is often a good practice to ensure AppProjects do not allow more access than needed. This policy is a combination of two rules which enforce that all AppProjects specify clusterResourceBlacklist and that their group and kind have wildcards as values.
spec:
  validationFailureAction: Audit
  background: true
  rules:
    - name: has-wildcard
      match:
        any:
          - resources:
              kinds:
                - AppProject
      preconditions:
        all:
          - key: "{{ request.operation || 'BACKGROUND' }}"
            operator: AnyIn
            value:
              - CREATE
              - UPDATE
      validate:
        message: Wildcards must be present in group and kind for clusterResourceBlacklist.
        foreach:
          - list: request.object.spec.clusterResourceBlacklist
            deny:
              conditions:
                any:
                  - key: "{{ contains(element.group, '*') }}"
                    operator: Equals
                    value: false
                  - key: "{{ contains(element.kind, '*') }}"
                    operator: Equals
                    value: false
    - name: validate-clusterresourceblacklist
      match:
        any:
          - resources:
              kinds:
                - AppProject
      preconditions:
        all:
          - key: "{{ request.operation || 'BACKGROUND' }}"
            operator: AnyIn
            value:
              - CREATE
              - UPDATE
      validate:
        message: AppProject must specify clusterResourceBlacklist.
        deny:
          conditions:
            any:
              - key: clusterResourceBlacklist
                operator: AnyNotIn
                value: "{{ request.object.spec.keys(@) }}"