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reconciler.go
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reconciler.go
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package togglebutton
import (
"context"
"fmt"
"time"
"k8s.io/apimachinery/pkg/runtime"
"github.com/pkg/errors"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/builder"
"sigs.k8s.io/controller-runtime/pkg/client"
ctrlclient "sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
"github.com/tilt-dev/tilt/internal/controllers/indexer"
"github.com/tilt-dev/tilt/pkg/apis/core/v1alpha1"
)
const (
actionUIInputName = "action"
turnOnInputValue = "on"
turnOffInputValue = "off"
)
type Reconciler struct {
ctrlClient ctrlclient.Client
indexer *indexer.Indexer
lastClickProcessTimes map[string]time.Time
}
func (r *Reconciler) CreateBuilder(mgr ctrl.Manager) (*builder.Builder, error) {
b := ctrl.NewControllerManagedBy(mgr).
For(&v1alpha1.ToggleButton{}).
Watches(&source.Kind{Type: &v1alpha1.ConfigMap{}},
handler.EnqueueRequestsFromMapFunc(r.indexer.Enqueue)).
Owns(&v1alpha1.UIButton{})
return b, nil
}
func NewReconciler(ctrlClient ctrlclient.Client, scheme *runtime.Scheme) *Reconciler {
return &Reconciler{
ctrlClient: ctrlClient,
indexer: indexer.NewIndexer(scheme, indexToggleButton),
lastClickProcessTimes: make(map[string]time.Time),
}
}
func indexToggleButton(obj client.Object) []indexer.Key {
var result []indexer.Key
toggleButton := obj.(*v1alpha1.ToggleButton)
bGVK := v1alpha1.SchemeGroupVersion.WithKind("ConfigMap")
if toggleButton != nil {
if toggleButton.Spec.StateSource.ConfigMap != nil {
result = append(result, indexer.Key{
Name: types.NamespacedName{Name: toggleButton.Spec.StateSource.ConfigMap.Name},
GVK: bGVK,
})
}
}
return result
}
func (r *Reconciler) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
nn := request.NamespacedName
tb := &v1alpha1.ToggleButton{}
err := r.ctrlClient.Get(ctx, nn, tb)
r.indexer.OnReconcile(nn, tb)
if client.IgnoreNotFound(err) != nil {
return ctrl.Result{}, err
}
if apierrors.IsNotFound(err) || !tb.ObjectMeta.DeletionTimestamp.IsZero() {
err := r.managedOwnedUIButton(ctx, nn, nil, false)
return ctrl.Result{}, err
}
origError := tb.Status.Error
// clear the error - if its conditions still apply, it will get re-set
tb.Status.Error = ""
err = r.processClick(ctx, tb)
if err != nil {
return ctrl.Result{}, err
}
isOn, err := r.isOn(ctx, tb)
if err != nil {
return ctrl.Result{}, err
}
err = r.managedOwnedUIButton(ctx, nn, tb, isOn)
if err != nil {
return ctrl.Result{}, err
}
if origError != tb.Status.Error {
err := r.ctrlClient.Status().Update(ctx, tb)
if err != nil {
return ctrl.Result{}, err
}
}
return ctrl.Result{}, err
}
func (r *Reconciler) processClick(ctx context.Context, tb *v1alpha1.ToggleButton) error {
uiButton := v1alpha1.UIButton{}
err := r.ctrlClient.Get(ctx, types.NamespacedName{Name: uibuttonName(tb.Name)}, &uiButton)
if err != nil {
if apierrors.IsNotFound(err) {
return nil
} else {
return err
}
}
// if there's a new click, pass the new value through to the ConfigMap
if uiButton.Status.LastClickedAt.After(r.lastClickProcessTimes[tb.Name]) {
foundInput := false
var isOn bool
for _, input := range uiButton.Status.Inputs {
if input.Name == actionUIInputName {
if input.Hidden == nil {
tb.Status.Error = fmt.Sprintf(
"button %q input %q was not of type 'Hidden'",
uiButton.Name,
input.Name,
)
return nil
}
switch input.Hidden.Value {
case turnOnInputValue:
isOn = true
case turnOffInputValue:
isOn = false
default:
tb.Status.Error = fmt.Sprintf("button %q input %q had unexpected value %q", uiButton.Name, input.Name, input.Hidden.Value)
return nil
}
foundInput = true
break
}
}
if !foundInput {
tb.Status.Error = fmt.Sprintf("UIButton %q does not have an input named %q", uiButton.Name, actionUIInputName)
return nil
}
ss := tb.Spec.StateSource.ConfigMap
if ss == nil {
tb.Status.Error = "Spec.StateSource.ConfigMap is nil"
return nil
}
var cm v1alpha1.ConfigMap
err := r.ctrlClient.Get(ctx, types.NamespacedName{Name: ss.Name}, &cm)
if err != nil {
return errors.Wrap(err, "fetching ToggleButton ConfigMap")
}
var newValue string
if isOn {
newValue = ss.OnValue
} else {
newValue = ss.OffValue
}
if cm.Data == nil {
cm.Data = make(map[string]string)
}
currentValue, ok := cm.Data[ss.Key]
if !ok || currentValue != newValue {
cm.Data[ss.Key] = newValue
err := r.ctrlClient.Update(ctx, &cm)
if err != nil {
return errors.Wrap(err, "updating ConfigMap with ToggleButton value")
}
}
r.lastClickProcessTimes[tb.Name] = time.Now()
}
return nil
}
func (r *Reconciler) isOn(ctx context.Context, tb *v1alpha1.ToggleButton) (bool, error) {
isOn := tb.Spec.DefaultOn
ss := tb.Spec.StateSource.ConfigMap
if ss == nil {
tb.Status.Error = "Spec.StateSource.ConfigMap is nil"
return isOn, nil
}
var cm v1alpha1.ConfigMap
err := r.ctrlClient.Get(ctx, types.NamespacedName{Name: ss.Name}, &cm)
if client.IgnoreNotFound(err) != nil {
return false, errors.Wrapf(err, "fetching ToggleButton %q ConfigMap %q", tb.Name, ss.Name)
}
if apierrors.IsNotFound(err) {
tb.Status.Error = fmt.Sprintf("no such ConfigMap %q", ss.Name)
return isOn, nil
}
if cm.Data != nil {
cmVal, ok := cm.Data[ss.Key]
if ok {
switch cmVal {
case ss.OnValue:
isOn = true
case ss.OffValue:
isOn = false
default:
tb.Status.Error = fmt.Sprintf(
"ConfigMap %q key %q has unknown value %q. expected %q or %q",
ss.Name,
ss.Key,
cmVal,
ss.OnValue,
ss.OffValue)
return isOn, nil
}
}
}
return isOn, nil
}
func (r *Reconciler) managedOwnedUIButton(ctx context.Context, nn types.NamespacedName, tb *v1alpha1.ToggleButton, isOn bool) error {
b := &v1alpha1.UIButton{ObjectMeta: metav1.ObjectMeta{Name: uibuttonName(nn.Name), Namespace: nn.Namespace}}
if tb == nil {
err := r.ctrlClient.Delete(ctx, b)
return ctrlclient.IgnoreNotFound(err)
}
_, err := ctrl.CreateOrUpdate(ctx, r.ctrlClient, b, func() error {
return r.configureUIButton(b, isOn, tb)
})
if err != nil {
return errors.Wrapf(err, "upserting ToggleButton %q's UIButton", tb.Name)
}
return nil
}
func uibuttonName(tbName string) string {
return fmt.Sprintf("toggle-%s", tbName)
}
func (r *Reconciler) configureUIButton(b *v1alpha1.UIButton, isOn bool, tb *v1alpha1.ToggleButton) error {
var stateSpec v1alpha1.ToggleButtonStateSpec
var value string
if isOn {
stateSpec = tb.Spec.On
value = turnOffInputValue
} else {
stateSpec = tb.Spec.Off
value = turnOnInputValue
}
if b.Annotations == nil {
b.Annotations = make(map[string]string)
}
b.Annotations[v1alpha1.AnnotationButtonType] = tb.Annotations[v1alpha1.AnnotationButtonType]
b.Spec = v1alpha1.UIButtonSpec{
Location: tb.Spec.Location,
Text: stateSpec.Text,
IconName: stateSpec.IconName,
IconSVG: stateSpec.IconSVG,
RequiresConfirmation: stateSpec.RequiresConfirmation,
Inputs: []v1alpha1.UIInputSpec{
{
Name: actionUIInputName,
Hidden: &v1alpha1.UIHiddenInputSpec{Value: value},
},
},
}
err := controllerutil.SetControllerReference(tb, b, r.ctrlClient.Scheme())
if err != nil {
return errors.Wrapf(err, "setting ToggleButton %q's UIButton's controller reference", tb.Name)
}
return nil
}