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// SPDX-License-Identifier: GPL-3.0-or-later
package match
import (
"fmt"
"strings"
rs "github.com/netdata/netdata/go/go.d.plugin/modules/vsphere/resources"
"github.com/netdata/netdata/go/go.d.plugin/pkg/matcher"
)
type HostMatcher interface {
Match(*rs.Host) bool
}
type VMMatcher interface {
Match(*rs.VM) bool
}
type (
hostDCMatcher struct{ m matcher.Matcher }
hostClusterMatcher struct{ m matcher.Matcher }
hostHostMatcher struct{ m matcher.Matcher }
vmDCMatcher struct{ m matcher.Matcher }
vmClusterMatcher struct{ m matcher.Matcher }
vmHostMatcher struct{ m matcher.Matcher }
vmVMMatcher struct{ m matcher.Matcher }
orHostMatcher struct{ lhs, rhs HostMatcher }
orVMMatcher struct{ lhs, rhs VMMatcher }
andHostMatcher struct{ lhs, rhs HostMatcher }
andVMMatcher struct{ lhs, rhs VMMatcher }
)
func (m hostDCMatcher) Match(host *rs.Host) bool { return m.m.MatchString(host.Hier.DC.Name) }
func (m hostClusterMatcher) Match(host *rs.Host) bool { return m.m.MatchString(host.Hier.Cluster.Name) }
func (m hostHostMatcher) Match(host *rs.Host) bool { return m.m.MatchString(host.Name) }
func (m vmDCMatcher) Match(vm *rs.VM) bool { return m.m.MatchString(vm.Hier.DC.Name) }
func (m vmClusterMatcher) Match(vm *rs.VM) bool { return m.m.MatchString(vm.Hier.Cluster.Name) }
func (m vmHostMatcher) Match(vm *rs.VM) bool { return m.m.MatchString(vm.Hier.Host.Name) }
func (m vmVMMatcher) Match(vm *rs.VM) bool { return m.m.MatchString(vm.Name) }
func (m orHostMatcher) Match(host *rs.Host) bool { return m.lhs.Match(host) || m.rhs.Match(host) }
func (m orVMMatcher) Match(vm *rs.VM) bool { return m.lhs.Match(vm) || m.rhs.Match(vm) }
func (m andHostMatcher) Match(host *rs.Host) bool { return m.lhs.Match(host) && m.rhs.Match(host) }
func (m andVMMatcher) Match(vm *rs.VM) bool { return m.lhs.Match(vm) && m.rhs.Match(vm) }
func newAndHostMatcher(lhs, rhs HostMatcher, others ...HostMatcher) andHostMatcher {
m := andHostMatcher{lhs: lhs, rhs: rhs}
switch len(others) {
case 0:
return m
default:
return newAndHostMatcher(m, others[0], others[1:]...)
}
}
func newAndVMMatcher(lhs, rhs VMMatcher, others ...VMMatcher) andVMMatcher {
m := andVMMatcher{lhs: lhs, rhs: rhs}
switch len(others) {
case 0:
return m
default:
return newAndVMMatcher(m, others[0], others[1:]...)
}
}
func newOrHostMatcher(lhs, rhs HostMatcher, others ...HostMatcher) orHostMatcher {
m := orHostMatcher{lhs: lhs, rhs: rhs}
switch len(others) {
case 0:
return m
default:
return newOrHostMatcher(m, others[0], others[1:]...)
}
}
func newOrVMMatcher(lhs, rhs VMMatcher, others ...VMMatcher) orVMMatcher {
m := orVMMatcher{lhs: lhs, rhs: rhs}
switch len(others) {
case 0:
return m
default:
return newOrVMMatcher(m, others[0], others[1:]...)
}
}
type (
VMIncludes []string
HostIncludes []string
)
func (vi VMIncludes) Parse() (VMMatcher, error) {
var ms []VMMatcher
for _, v := range vi {
m, err := parseVMInclude(v)
if err != nil {
return nil, err
}
if m == nil {
continue
}
ms = append(ms, m)
}
switch len(ms) {
case 0:
return nil, nil
case 1:
return ms[0], nil
default:
return newOrVMMatcher(ms[0], ms[1], ms[2:]...), nil
}
}
func (hi HostIncludes) Parse() (HostMatcher, error) {
var ms []HostMatcher
for _, v := range hi {
m, err := parseHostInclude(v)
if err != nil {
return nil, err
}
if m == nil {
continue
}
ms = append(ms, m)
}
switch len(ms) {
case 0:
return nil, nil
case 1:
return ms[0], nil
default:
return newOrHostMatcher(ms[0], ms[1], ms[2:]...), nil
}
}
const (
datacenterIdx = iota
clusterIdx
hostIdx
vmIdx
)
func cleanInclude(include string) string {
return strings.Trim(include, "/")
}
func parseHostInclude(include string) (HostMatcher, error) {
if !isIncludeFormatValid(include) {
return nil, fmt.Errorf("bad include format: %s", include)
}
include = cleanInclude(include)
parts := strings.Split(include, "/") // /dc/clusterIdx/hostIdx
var ms []HostMatcher
for i, v := range parts {
m, err := parseSubInclude(v)
if err != nil {
return nil, err
}
switch i {
case datacenterIdx:
ms = append(ms, hostDCMatcher{m})
case clusterIdx:
ms = append(ms, hostClusterMatcher{m})
case hostIdx:
ms = append(ms, hostHostMatcher{m})
}
}
switch len(ms) {
case 0:
return nil, nil
case 1:
return ms[0], nil
default:
return newAndHostMatcher(ms[0], ms[1], ms[2:]...), nil
}
}
func parseVMInclude(include string) (VMMatcher, error) {
if !isIncludeFormatValid(include) {
return nil, fmt.Errorf("bad include format: %s", include)
}
include = cleanInclude(include)
parts := strings.Split(include, "/") // /dc/clusterIdx/hostIdx/vmIdx
var ms []VMMatcher
for i, v := range parts {
m, err := parseSubInclude(v)
if err != nil {
return nil, err
}
switch i {
case datacenterIdx:
ms = append(ms, vmDCMatcher{m})
case clusterIdx:
ms = append(ms, vmClusterMatcher{m})
case hostIdx:
ms = append(ms, vmHostMatcher{m})
case vmIdx:
ms = append(ms, vmVMMatcher{m})
}
}
switch len(ms) {
case 0:
return nil, nil
case 1:
return ms[0], nil
default:
return newAndVMMatcher(ms[0], ms[1], ms[2:]...), nil
}
}
func parseSubInclude(sub string) (matcher.Matcher, error) {
sub = strings.TrimSpace(sub)
if sub == "" || sub == "!*" {
return matcher.FALSE(), nil
}
if sub == "*" {
return matcher.TRUE(), nil
}
return matcher.NewSimplePatternsMatcher(sub)
}
func isIncludeFormatValid(line string) bool {
return strings.HasPrefix(line, "/")
}
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