| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package selector |
| 4 | |
| 5 | import ( |
| 6 | "github.com/netdata/netdata/go/plugins/pkg/selectorcore" |
| 7 | |
| 8 | "github.com/prometheus/prometheus/model/labels" |
| 9 | ) |
| 10 | |
| 11 | type Selector interface { |
| 12 | Matches(lbs labels.Labels) bool |
| 13 | } |
| 14 | |
| 15 | const ( |
| 16 | OpEqual = selectorcore.OpEqual |
| 17 | OpNegEqual = selectorcore.OpNegEqual |
| 18 | OpRegexp = selectorcore.OpRegexp |
| 19 | OpNegRegexp = selectorcore.OpNegRegexp |
| 20 | OpSimplePatterns = selectorcore.OpSimplePatterns |
| 21 | OpNegSimplePatterns = selectorcore.OpNegSimplePatterns |
| 22 | ) |
| 23 | |
| 24 | type Func func(lbs labels.Labels) bool |
| 25 | |
| 26 | func (fn Func) Matches(lbs labels.Labels) bool { |
| 27 | return fn(lbs) |
| 28 | } |
| 29 | |
| 30 | type corePromSelector struct { |
| 31 | core selectorcore.Selector |
| 32 | } |
| 33 | |
| 34 | func (s corePromSelector) Matches(lbs labels.Labels) bool { |
| 35 | return s.core.Matches(metricNameFromPromLabels(lbs), promLabelsView{labels: lbs}) |
| 36 | } |
| 37 | |
| 38 | func wrapCoreSelector(sel selectorcore.Selector) Selector { |
| 39 | if sel == nil { |
| 40 | return nil |
| 41 | } |
| 42 | return corePromSelector{core: sel} |
| 43 | } |
| 44 | |
| 45 | type promLabelsView struct { |
| 46 | labels labels.Labels |
| 47 | } |
| 48 | |
| 49 | func (v promLabelsView) Get(key string) (string, bool) { |
| 50 | for _, label := range v.labels { |
| 51 | if label.Name == key { |
| 52 | return label.Value, true |
| 53 | } |
| 54 | } |
| 55 | return "", false |
| 56 | } |
| 57 | |
| 58 | func metricNameFromPromLabels(lbs labels.Labels) string { |
| 59 | if len(lbs) == 0 { |
| 60 | return "" |
| 61 | } |
| 62 | if lbs[0].Name == labels.MetricName { |
| 63 | return lbs[0].Value |
| 64 | } |
| 65 | for _, label := range lbs { |
| 66 | if label.Name == labels.MetricName { |
| 67 | return label.Value |
| 68 | } |
| 69 | } |
| 70 | return "" |
| 71 | } |