67 lines
1.8 KiB
Go
67 lines
1.8 KiB
Go
package changeDetector
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import (
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"fmt"
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"realdnydns/pkg/config"
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"realdnydns/pkg/dnsProvider"
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"realdnydns/pkg/externalIpProvider"
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"realdnydns/pkg/notificationProvider"
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)
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type ChangeDetector struct {
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externalIpProvider externalIpProvider.ExternalIpProvider
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dnsProvider dnsProvider.DNSProvider
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notificationProvider notificationProvider.NotificationProvider
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domains []config.DomainConfig
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}
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func New(
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externalIpProvider externalIpProvider.ExternalIpProvider,
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dnsProvider dnsProvider.DNSProvider,
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notificationProvider notificationProvider.NotificationProvider,
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domains []config.DomainConfig,
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) ChangeDetector {
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return ChangeDetector{
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externalIpProvider: externalIpProvider,
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dnsProvider: dnsProvider,
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notificationProvider: notificationProvider,
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domains: domains,
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}
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}
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func (c *ChangeDetector) DetectAndApplyChanges() (int, error) {
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externalIp, err := c.externalIpProvider.GetExternalIp()
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if err != nil {
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return 0, err
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}
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var numberUpdated int
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for _, domain := range c.domains {
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for _, subdomain := range domain.Subdomains {
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currentRecord, err := c.dnsProvider.GetRecord(domain.TLD, subdomain)
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if err != nil {
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return numberUpdated, err
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}
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if currentRecord.IP != externalIp.String() {
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err = c.notificationProvider.SendNotification(
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fmt.Sprintf("Update %s.%s", subdomain, domain.TLD),
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fmt.Sprintf("The IP of %s has changed from %s to %s", domain.TLD, currentRecord.IP, externalIp.String()),
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)
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if err != nil {
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return numberUpdated, err
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}
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_, err = c.dnsProvider.UpdateRecord(domain.TLD, subdomain, externalIp, currentRecord.TTL, currentRecord.Prio, currentRecord.Disabled)
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numberUpdated++
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if err != nil {
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return numberUpdated, err
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}
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}
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}
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}
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return numberUpdated, nil
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}
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