Add logic to set the operator's status in the NFD CR

Add logic that sets the operator's status in the NFD CR based on
whether one or more of NFD's resources is: degraded, progressing,
upgradeable, or available. Also add a "applyComponents" function
to simplify readability.

Signed-off-by: Carlos Eduardo Arango Gutierrez <carangog@redhat.com>
Co-Authored-by: Courtney Pacheco <cpacheco@redhat.com>
Co-authored-by: Markus Lehtonen <markus.lehtonen@intel.com>

controllers/nodefeaturediscovery_status.go

@@ -1,3 +1,19 @@
+/*
+Copyright 2020-2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package controllers
 
 import (
@@ -14,14 +30,12 @@ import (
 )
 
 // nodeType is either 'worker' or 'master'
-type nodeType int
+type nfdInstanceType string
 
 const (
-	worker       nodeType = 0
-	master       nodeType = 1
-	nfdNamespace          = "node-feature-discovery-operator"
-	workerName            = "nfd-worker"
-	masterName            = "nfd-master"
+	nfdNamespace                   = "node-feature-discovery-operator"
+	workerInstance nfdInstanceType = "nfd-worker"
+	masterInstance nfdInstanceType = "nfd-master"
 )
 
 const (
@@ -130,15 +144,8 @@ func (r *NodeFeatureDiscoveryReconciler) updateStatus(nfd *nfdv1.NodeFeatureDisc
 
 // updateDegradedCondition is used to mark a given resource as "degraded" so that
 // the reconciler can take steps to rectify the situation.
-func (r *NodeFeatureDiscoveryReconciler) updateDegradedCondition(nfd *nfdv1.NodeFeatureDiscovery, condition string, conditionErr error) (ctrl.Result, error) {
-
-	// It is already assumed that the resource has been degraded, so the first
-	// step is to gather the correct list of conditions.
-	var conditionErrMsg string = "Degraded"
-	if conditionErr != nil {
-		conditionErrMsg = conditionErr.Error()
-	}
-	degradedCondition := r.getDegradedConditions(condition, conditionErrMsg)
+func (r *NodeFeatureDiscoveryReconciler) updateDegradedCondition(nfd *nfdv1.NodeFeatureDiscovery, reason, message string) (ctrl.Result, error) {
+	degradedCondition := r.getDegradedConditions(reason, message)
 	if err := r.updateStatus(nfd, degradedCondition); err != nil {
 		return reconcile.Result{}, err
 	}