// TODO: Consider using a mocking library instead or fully fleshing this out into a fake impl and putting it in some
// generally available location
func (f *Factory) ValidateBytes(data []byte) error {
var obj interface{}
out, err := k8syaml.ToJSON(data)
if err != nil {
return err
}
data = out
if err := json.Unmarshal(data, &obj); err != nil {
return err
}
fields, ok := obj.(map[string]interface{})
if !ok {
return fmt.Errorf("error in unmarshaling data %s", string(data))
}
// Note: This only supports the 2 api versions we expect from the test it is currently supporting.
groupVersion := fields["apiVersion"]
switch groupVersion {
case "v1":
return f.defaultSchema.ValidateBytes(data)
case "extensions/v1beta1":
return f.extensionsSchema.ValidateBytes(data)
default:
return fmt.Errorf("Unsupported API version %s", groupVersion)
}
}
// NewDelta accepts two JSON or YAML documents and calculates the difference
// between them. It returns a Delta object which can be used to resolve
// conflicts against a third version with a common parent, or an error
// if either document is in error.
func NewDelta(from, to []byte) (*Delta, error) {
d := &Delta{}
before, err := yaml.ToJSON(from)
if err != nil {
return nil, err
}
after, err := yaml.ToJSON(to)
if err != nil {
return nil, err
}
diff, err := jsonpatch.CreateMergePatch(before, after)
if err != nil {
return nil, err
}
glog.V(6).Infof("Patch created from:\n%s\n%s\n%s", string(before), string(after), string(diff))
d.original = before
d.edit = diff
return d, nil
}
// Apply attempts to apply the changes described by Delta onto latest,
// returning an error if the changes cannot be applied cleanly.
// IsConflicting will be true if the changes overlap, otherwise a
// generic error will be returned.
func (d *Delta) Apply(latest []byte) ([]byte, error) {
base, err := yaml.ToJSON(latest)
if err != nil {
return nil, err
}
changes, err := jsonpatch.CreateMergePatch(d.original, base)
if err != nil {
return nil, err
}
diff1 := make(map[string]interface{})
if err := json.Unmarshal(d.edit, &diff1); err != nil {
return nil, err
}
diff2 := make(map[string]interface{})
if err := json.Unmarshal(changes, &diff2); err != nil {
return nil, err
}
for _, fn := range d.preconditions {
hold1, _ := fn(diff1)
hold2, _ := fn(diff2)
if !hold1 || !hold2 {
return nil, ErrPreconditionFailed
}
}
glog.V(6).Infof("Testing for conflict between:\n%s\n%s", string(d.edit), string(changes))
hasConflicts, err := strategicpatch.HasConflicts(diff1, diff2)
if err != nil {
return nil, err
}
if hasConflicts {
return nil, ErrConflict
}
return jsonpatch.MergePatch(base, d.edit)
}