Add bunny.net provider

Signed-off-by: Mel <mel@rnrd.eu>

1 files changed, 117 insertions, 0 deletions

diff --git a/provider/bunny.go b/provider/bunny.go
new file mode 100644
index 0000000..c550a78
--- /dev/null
+++ b/provider/bunny.go
@@ -0,0 +1,117 @@
+package provider
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"log/slog"
+	"net/netip"
+	"net/url"
+)
+
+type bunny struct {
+	log *slog.Logger
+	key string
+}
+
+var _ Provider = (*bunny)(nil)
+
+func newBunny(log *slog.Logger, cfg Config) (*bunny, error) {
+	key, err := cfg.key()
+	if err != nil {
+		return nil, fmt.Errorf("failed instantiating bunny provider: %w", err)
+	}
+	return &bunny{key: key, log: log}, nil
+}
+
+const bunnyAPI = "https://api.bunny.net/dnszone"
+
+// bunny encodes record types numerically.
+var bunnyTypes = map[RecordType]int{TypeA: 0, TypeAAAA: 1}
+
+func (b *bunny) headers() map[string]string {
+	return map[string]string{"AccessKey": b.key}
+}
+
+func (b *bunny) Ensure(zone, name string, rtype RecordType, addr netip.Addr) (string, bool, error) {
+	b.log.Info("updating record via bunny.net api")
+
+	var zones struct {
+		Items []struct {
+			ID     int64  `json:"Id"`
+			Domain string `json:"Domain"`
+		} `json:"Items"`
+	}
+	raw, err := request("GET", bunnyAPI+"?search="+url.QueryEscape(zone),
+		b.headers(), nil)
+	if err != nil {
+		return "", false, err
+	}
+	if err := json.Unmarshal(raw, &zones); err != nil {
+		return "", false, err
+	}
+	var zoneID int64 = -1
+	for _, z := range zones.Items {
+		if z.Domain == zone {
+			zoneID = z.ID
+		}
+	}
+	if zoneID < 0 {
+		return "", false, fmt.Errorf("zone %s not found in bunny", zone)
+	}
+
+	var details struct {
+		Records []struct {
+			ID    int64  `json:"Id"`
+			Type  int    `json:"Type"`
+			Name  string `json:"Name"`
+			Value string `json:"Value"`
+		} `json:"Records"`
+	}
+	raw, err = request("GET", fmt.Sprintf("%s/%d", bunnyAPI, zoneID), b.headers(), nil)
+	if err != nil {
+		return "", false, fmt.Errorf("failed to request zone details from bunny: %w", err)
+	}
+	if err := json.Unmarshal(raw, &details); err != nil {
+		return "", false, fmt.Errorf("received malformed zone details from bunny: %w", err)
+	}
+
+	body, _ := json.Marshal(map[string]any{
+		"Type":  bunnyTypes[rtype],
+		"Name":  name,
+		"Value": addr.String(),
+		"Ttl":   300,
+	})
+
+	for _, r := range details.Records {
+		if r.Type != bunnyTypes[rtype] || r.Name != name {
+			continue
+		}
+		if r.Value == addr.String() {
+			return r.Value, false, nil
+		}
+
+		b.log.Info(
+			"bunny knows this record, attempting update",
+			slog.Group(
+				"bunny",
+				slog.Int64("id", r.ID),
+				slog.Int("type", r.Type),
+				slog.String("name", r.Name),
+				slog.String("value", r.Value),
+			),
+		)
+
+		// if found, update
+		_, err = request("POST", fmt.Sprintf("%s/%d/records/%d", bunnyAPI, zoneID, r.ID),
+			b.headers(), bytes.NewReader(body))
+		return r.Value, true, err
+	}
+
+	b.log.Info("bunny does not know this record, attempting to create")
+
+	// if not found, create
+	_, err = request("PUT", fmt.Sprintf("%s/%d/records", bunnyAPI, zoneID),
+		b.headers(), bytes.NewReader(body))
+	return "", true, err
+}