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// SPDX-License-Identifier: GPL-3.0-or-later
package selector
import (
"github.com/netdata/netdata/go/go.d.plugin/pkg/matcher"
"github.com/prometheus/prometheus/model/labels"
)
type Selector interface {
Matches(lbs labels.Labels) bool
}
const (
OpEqual = "="
OpNegEqual = "!="
OpRegexp = "=~"
OpNegRegexp = "!~"
OpSimplePatterns = "=*"
OpNegSimplePatterns = "!*"
)
type labelSelector struct {
name string
m matcher.Matcher
}
func (s labelSelector) Matches(lbs labels.Labels) bool {
if s.name == labels.MetricName {
return s.m.MatchString(lbs[0].Value)
}
if label, ok := lookupLabel(s.name, lbs[1:]); ok {
return s.m.MatchString(label.Value)
}
return false
}
type Func func(lbs labels.Labels) bool
func (fn Func) Matches(lbs labels.Labels) bool {
return fn(lbs)
}
func lookupLabel(name string, lbs labels.Labels) (labels.Label, bool) {
for _, label := range lbs {
if label.Name == name {
return label, true
}
}
return labels.Label{}, false
}
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