feat: mvp (#1)

MVP including features:
* Detect IP change
* Configurable/generic external IP provider
* Configurable/generic DNS provider
* Impl. of plain external IP provider
* Impl. of Ionos DNS provider

Reviewed-on: #1
Co-authored-by: Timo Behrendt <t.behrendt@t00n.de>
Co-committed-by: Timo Behrendt <t.behrendt@t00n.de>

pkg/dnsProvider/ionos/ionos.go

@@ -0,0 +1,40 @@
+package ionosDnsProvider
+
+import (
+	"errors"
+	"net"
+	"realdnydns/model/common"
+	"realdnydns/pkg/dnsProvider"
+	ionosAPI "realdnydns/pkg/dnsProvider/ionos/api"
+)
+
+type IONOS struct {
+	API ionosAPI.IonosAPI
+}
+
+type IONOSConfig struct {
+	APIKey  string `yaml:"api_key"`
+	BaseURL string `yaml:"base_url"`
+}
+
+func NewIonos(config *IONOSConfig) (dnsProvider.DNSProvider, error) {
+	if config.APIKey == "" {
+		return nil, errors.New("api_key is required")
+	}
+
+	if config.BaseURL == "" {
+		return nil, errors.New("base_url is required")
+	}
+
+	return &IONOS{
+		ionosAPI.New(config.APIKey, config.BaseURL),
+	}, nil
+}
+
+func (ionos *IONOS) UpdateRecord(tld string, subdomain string, ip net.IP, ttl int, prio int, disabled bool) (*common.ARecord, error) {
+	return ionos.API.SetARecord(tld, subdomain, ip, ttl, prio, disabled)
+}
+
+func (ionos *IONOS) GetRecord(tld string, subdomain string) (*common.ARecord, error) {
+	return ionos.API.GetARecord(tld, subdomain)
+}