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conditions.go
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conditions.go
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/*
Copyright 2020 Noah Kantrowitz
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 core
import (
"fmt"
"reflect"
"strings"
"github.com/pkg/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/coderanger/controller-utils/conditions"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type ConditionsObject interface {
GetConditions() *[]conditions.Condition
}
func GetConditionsFor(obj client.Object) (*[]conditions.Condition, error) {
// Try the simple and correct way.
condObj, ok := obj.(ConditionsObject)
if ok {
return condObj.GetConditions(), nil
}
// Supply a dynamic fallback until I can get some code generation in place.
// Yes, I know this code is awful.
statusVal := reflect.ValueOf(obj).FieldByName("Status")
if statusVal.IsValid() {
conditionsVal := statusVal.FieldByName("Conditions")
if conditionsVal.IsValid() {
maybeConditions := conditionsVal.Addr().Interface()
conditions, ok := maybeConditions.(*[]conditions.Condition)
if ok {
return conditions, nil
}
}
}
return nil, errors.New("unable to get conditions")
}
type conditionsHelper struct {
obj client.Object
pendingConditions map[string]*conditions.Condition
}
func NewConditionsHelper(obj client.Object) *conditionsHelper {
return &conditionsHelper{
obj: obj,
pendingConditions: map[string]*conditions.Condition{},
}
}
func (h *conditionsHelper) Flush() error {
conds, err := GetConditionsFor(h.obj)
if err != nil {
return errors.Wrap(err, "error getting status conditions")
}
// Apply all pending conditions.
for _, cond := range h.pendingConditions {
conditions.SetStatusCondition(conds, *cond)
}
// Zero out the pending map.
h.pendingConditions = map[string]*conditions.Condition{}
return nil
}
func (h *conditionsHelper) SetCondition(cond *conditions.Condition) {
if cond.ObservedGeneration == 0 {
cond.ObservedGeneration = h.obj.GetGeneration()
}
h.pendingConditions[cond.Type] = cond
}
func (h *conditionsHelper) Set(conditionType string, status metav1.ConditionStatus, reason string, message ...string) {
h.SetCondition(&conditions.Condition{
Type: conditionType,
Status: status,
Reason: reason,
Message: strings.Join(message, ""),
})
}
func (h *conditionsHelper) Setf(conditionType string, status metav1.ConditionStatus, reason string, message string, args ...interface{}) {
h.Set(conditionType, status, reason, fmt.Sprintf(message, args...))
}
func (h *conditionsHelper) SetTrue(conditionType string, reason string, message ...string) {
h.Set(conditionType, metav1.ConditionTrue, reason, message...)
}
func (h *conditionsHelper) SetfTrue(conditionType string, reason string, message string, args ...interface{}) {
h.Setf(conditionType, metav1.ConditionTrue, reason, message, args...)
}
func (h *conditionsHelper) SetFalse(conditionType string, reason string, message ...string) {
h.Set(conditionType, metav1.ConditionFalse, reason, message...)
}
func (h *conditionsHelper) SetfFalse(conditionType string, reason string, message string, args ...interface{}) {
h.Setf(conditionType, metav1.ConditionFalse, reason, message, args...)
}
func (h *conditionsHelper) SetUnknown(conditionType string, reason string, message ...string) {
h.Set(conditionType, metav1.ConditionUnknown, reason, message...)
}
func (h *conditionsHelper) SetfUnknown(conditionType string, reason string, message string, args ...interface{}) {
h.Setf(conditionType, metav1.ConditionUnknown, reason, message, args...)
}