Adjust the conditions of gateway default listener

[Bryce-huang]

Description
The DefaultHttpListenerName will always inject to gateway

Environmental
Tell us what your cluster environment is like, e.g.

• Operating System Information
• kubernetes version
• OpenFunction version
• Versions of dependent components (e.g. dapr, keda, shipwright, knative)

Expected behavior

Only if there is no listener or the name of the listener is equal to DefaultHttpListenerName, the default listener will be injected into the gateway.

Actual behavior
Inject default listener any way.
To Reproduce
Steps to reproduce the behavior:

1. '..'
2. '...'
3. '....'
4. See error

Screenshots
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Additional context
Add any other context about the problem here.

[Bryce-huang]

needInjectDefaultListeners := true
	for index, listener := range r.Spec.GatewaySpec.Listeners {
		if listener.Name == DefaultHttpListenerName {
			needInjectDefaultListeners = false
			internalHostname := k8sgatewayapiv1beta1.Hostname(fmt.Sprintf("*.%s", r.Spec.ClusterDomain))
			namespaceFromAll := k8sgatewayapiv1beta1.NamespacesFromAll
			listener.Hostname = &internalHostname
			listener.Port = constants.DefaultGatewayListenerPort
			listener.Protocol = constants.DefaultGatewayListenerProtocol
			listener.AllowedRoutes = &k8sgatewayapiv1beta1.AllowedRoutes{
				Namespaces: &k8sgatewayapiv1beta1.RouteNamespaces{
					From: &namespaceFromAll,
				},
			}
		} else {
			hostname := k8sgatewayapiv1beta1.Hostname(fmt.Sprintf("*.%s", r.Spec.Domain))
			listener.Hostname = &hostname
		}
		r.Spec.GatewaySpec.Listeners[index] = listener
	}

	if needInjectDefaultListeners {
		internalHostname := k8sgatewayapiv1beta1.Hostname(fmt.Sprintf("*.%s", r.Spec.ClusterDomain))
		namespaceFromAll := k8sgatewayapiv1beta1.NamespacesFromAll
		internalHttpListener := k8sgatewayapiv1beta1.Listener{
			Name:     DefaultHttpListenerName,
			Hostname: &internalHostname,
			Port:     constants.DefaultGatewayListenerPort,
			Protocol: constants.DefaultGatewayListenerProtocol,
			AllowedRoutes: &k8sgatewayapiv1beta1.AllowedRoutes{
				Namespaces: &k8sgatewayapiv1beta1.RouteNamespaces{
					From: &namespaceFromAll,
				},
			},
		}
		r.Spec.GatewaySpec.Listeners = append(r.Spec.GatewaySpec.Listeners, internalHttpListener)
	}

Would it be better to add the condition needInjectDefaultListeners := len(r.Spec.GatewaySpec.Listeners) == 0?

[aryasoni98]

@Bryce-huang I would like to work on this issue