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/
labels.go
77 lines (67 loc) · 1.91 KB
/
labels.go
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package core
import (
"strings"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
type LabelSelectorOperator string
const (
LabelSelectorOpIn LabelSelectorOperator = "In"
LabelSelectorOpNotIn LabelSelectorOperator = "NotIn"
LabelSelectorOpExists LabelSelectorOperator = "Exists"
LabelSelectorOpDoesNotExist LabelSelectorOperator = "DoesNotExist"
NameLabel = "opni.io/name"
)
func (ls *LabelSelector) ExpressionString() string {
if ls == nil {
return ""
}
expressions := make([]string, 0, len(ls.MatchLabels)+len(ls.MatchExpressions))
for k, v := range ls.MatchLabels {
expressions = append(expressions, (&LabelSelectorRequirement{
Key: k,
Operator: string(LabelSelectorOpIn),
Values: []string{v},
}).ExpressionString())
}
for _, expr := range ls.MatchExpressions {
expressions = append(expressions, expr.ExpressionString())
}
return strings.Join(expressions, "&&")
}
func (lsr *LabelSelectorRequirement) ExpressionString() string {
if lsr == nil {
return ""
}
return keyWithOperatorSymbol(lsr.Key, lsr.Operator) + " [" + strings.Join(lsr.Values, ",") + "]"
}
func keyWithOperatorSymbol(key string, operator string) string {
switch LabelSelectorOperator(operator) {
case LabelSelectorOpIn:
return key + " ∈"
case LabelSelectorOpNotIn:
return key + " ∉"
case LabelSelectorOpExists:
return "∃ " + key
case LabelSelectorOpDoesNotExist:
return "∄ " + key
default:
return "?"
}
}
func (ls *LabelSelector) ToLabelSelector() *metav1.LabelSelector {
if ls == nil {
return nil
}
s := &metav1.LabelSelector{
MatchLabels: ls.MatchLabels,
MatchExpressions: []metav1.LabelSelectorRequirement{},
}
for _, expr := range ls.MatchExpressions {
s.MatchExpressions = append(s.MatchExpressions, metav1.LabelSelectorRequirement{
Key: expr.Key,
Operator: metav1.LabelSelectorOperator(expr.Operator),
Values: expr.Values,
})
}
return s
}