Refactor: Prelink providers to domains (#305)

models/provider.go

@@ -0,0 +1,27 @@
+package models
+
+type DNSProvider interface {
+	GetNameservers(domain string) ([]*Nameserver, error)
+	GetDomainCorrections(dc *DomainConfig) ([]*Correction, error)
+}
+
+type Registrar interface {
+	GetRegistrarCorrections(dc *DomainConfig) ([]*Correction, error)
+}
+
+type ProviderBase struct {
+	Name         string
+	IsDefault    bool
+	ProviderType string
+}
+
+type RegistrarInstance struct {
+	ProviderBase
+	Driver Registrar
+}
+
+type DNSProviderInstance struct {
+	ProviderBase
+	Driver              DNSProvider
+	NumberOfNameservers int
+}