dns

type Cloudflare struct {
	Token     string
	AccountID string
	BaseURL   string // default https://api.cloudflare.com/client/v4 (tests override it)
	Client    *http.Client
}

type CloudflareSettings struct {
	Token     string `json:"token"`
	AccountID string `json:"account_id"`
}

type PowerDNS struct {
	URL         string // e.g. http://127.0.0.1:8081
	APIKey      string
	ServerID    string   // default "localhost"
	Nameservers []string // NS records for new zones, e.g. ns1.example.com.
	Client      *http.Client
}

type PowerDNSSettings struct {
	URL         string   `json:"url"`
	APIKey      string   `json:"api_key"`
	ServerID    string   `json:"server_id"`
	Nameservers []string `json:"nameservers"`
}

type Provider interface {
	// CreateZone creates a zone and returns the provider's ID for it and its nameservers.
	CreateZone(ctx context.Context, zone string) (remoteID string, nameservers []string, err error)
	DeleteZone(ctx context.Context, zone, remoteID string) error
	// RRSets lists the zone's records (SOA included when the provider exposes it).
	RRSets(ctx context.Context, zone, remoteID string) ([]RRSet, error)
	// SetRRSet replaces all records of set.Name/set.Type.
	SetRRSet(ctx context.Context, zone, remoteID string, set RRSet) error
	DeleteRRSet(ctx context.Context, zone, remoteID, name, typ string) error
}

type RRSet struct {
	Name    string   `json:"name"` // fully qualified, trailing dot
	Type    string   `json:"type"`
	TTL     int      `json:"ttl"`
	Records []string `json:"records"`
}

type Settings struct {
	Provider   string             `json:"provider"` // "" (off) | powerdns | cloudflare
	PowerDNS   PowerDNSSettings   `json:"powerdns"`
	Cloudflare CloudflareSettings `json:"cloudflare"`
	// Customers may create zones only for domains of their websites; admins for any domain.
	AutoRecords bool `json:"auto_records"` // add A records for website domains in hosted zones
}