125 lines
2.2 KiB
Go
125 lines
2.2 KiB
Go
package dns
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import (
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"errors"
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"strings"
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"sync"
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"darvaza.org/core"
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"darvaza.org/slog"
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"git.jpi.io/amery/jpictl/pkg/cluster"
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"golang.org/x/net/publicsuffix"
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)
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// Manager is a DNS Manager instance
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type Manager struct {
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mu sync.Mutex
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domain string
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suffix string
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zones map[string]*Zone
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regions map[string][]string
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p Provider
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l slog.Logger
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}
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// ManagerOption configures a Manager
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type ManagerOption func(*Manager) error
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func newErrorManagerOption(err error, hint string) ManagerOption {
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return func(*Manager) error {
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if hint != "" {
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err = core.Wrap(err, hint)
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}
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return err
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}
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}
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// WithProvider attaches a libdns Provider to the Manager
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func WithProvider(p Provider) ManagerOption {
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var err error
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if p == nil {
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p, err = DefaultDNSProvider()
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}
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if err != nil {
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return newErrorManagerOption(err, "WithProvider")
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}
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return func(mgr *Manager) error {
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mgr.p = p
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return nil
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}
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}
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// WithLogger attaches a logger to the Manager
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func WithLogger(log slog.Logger) ManagerOption {
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if log == nil {
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log = cluster.DefaultLogger()
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}
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return func(mgr *Manager) error {
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mgr.l = log
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return nil
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}
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}
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func (mgr *Manager) setDefaults() error {
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var opts []ManagerOption
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if mgr.l == nil {
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opts = append(opts, WithLogger(nil))
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}
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if mgr.domain == "" || mgr.suffix == "" {
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return errors.New("domain not specified")
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}
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mgr.zones = make(map[string]*Zone)
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mgr.regions = make(map[string][]string)
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for _, opt := range opts {
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if err := opt(mgr); err != nil {
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return err
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}
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}
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return nil
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}
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// WithDomain specifies where the manager operates
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func WithDomain(domain string) ManagerOption {
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base, err := publicsuffix.EffectiveTLDPlusOne(domain)
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if err != nil {
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return newErrorManagerOption(err, "publicsuffix")
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}
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suffix := strings.TrimSuffix(domain, base)
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if suffix != "" {
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suffix = "." + suffix[:len(suffix)-1]
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}
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return func(mgr *Manager) error {
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mgr.domain = base
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mgr.suffix = suffix
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return nil
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}
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}
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// NewManager creates a DNS manager with the
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func NewManager(opts ...ManagerOption) (*Manager, error) {
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mgr := new(Manager)
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for _, opt := range opts {
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if err := opt(mgr); err != nil {
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return nil, err
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}
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}
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if err := mgr.setDefaults(); err != nil {
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return nil, err
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}
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return mgr, nil
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}
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