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annotations.go
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annotations.go
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package types
import (
"encoding/json"
"fmt"
)
type Annotations []Annotation
type annotations Annotations
type Annotation struct {
Name ACName `json:"name"`
Value string `json:"value"`
}
func (a Annotations) assertValid() error {
seen := map[ACName]string{}
for _, anno := range a {
_, ok := seen[anno.Name]
if ok {
return fmt.Errorf(`duplicate annotations of name %q`, anno.Name)
}
seen[anno.Name] = anno.Value
}
if c, ok := seen["created"]; ok {
if _, err := NewDate(c); err != nil {
return err
}
}
if h, ok := seen["homepage"]; ok {
if _, err := NewURL(h); err != nil {
return err
}
}
if d, ok := seen["documentation"]; ok {
if _, err := NewURL(d); err != nil {
return err
}
}
return nil
}
func (a Annotations) MarshalJSON() ([]byte, error) {
if err := a.assertValid(); err != nil {
return nil, err
}
return json.Marshal(annotations(a))
}
func (a *Annotations) UnmarshalJSON(data []byte) error {
var ja annotations
if err := json.Unmarshal(data, &ja); err != nil {
return err
}
na := Annotations(ja)
if err := na.assertValid(); err != nil {
return err
}
*a = na
return nil
}
// Retrieve the value of an annotation by the given name from Annotations, if
// it exists.
func (a Annotations) Get(name string) (val string, ok bool) {
for _, anno := range a {
if anno.Name.String() == name {
return anno.Value, true
}
}
return "", false
}
// Set sets the value of an annotation by the given name, overwriting if one already exists.
func (a *Annotations) Set(name ACName, value string) {
for i, anno := range *a {
if anno.Name.Equals(name) {
(*a)[i] = Annotation{
Name: name,
Value: value,
}
return
}
}
anno := Annotation{
Name: name,
Value: value,
}
*a = append(*a, anno)
}