Add DNS Server Backend

internal/api/service/dns_server.go

@@ -0,0 +1,81 @@
+package service
+
+import (
+	"context"
+	"fmt"
+
+	"nfsense.net/nfsense/internal/definitions/service"
+)
+
+type GetDNSServerParameters struct {
+	ID uint
+}
+
+type GetDNSServerResult struct {
+	service.DNSServer
+}
+
+func (f *Service) GetDNSServer(ctx context.Context, params GetDNSServerParameters) (GetDNSServerResult, error) {
+	if int(params.ID) >= len(f.ConfigManager.GetPendingConfig().Service.DNSServers) {
+		return GetDNSServerResult{}, fmt.Errorf("DNSServer does not Exist")
+	}
+
+	return GetDNSServerResult{
+		DNSServer: f.ConfigManager.GetPendingConfig().Service.DNSServers[params.ID],
+	}, nil
+}
+
+type GetDNSServersResult struct {
+	DNSServers []service.DNSServer `json:"dns_servers"`
+}
+
+func (f *Service) GetDNSServers(ctx context.Context, params struct{}) (GetDNSServersResult, error) {
+	return GetDNSServersResult{
+		DNSServers: f.ConfigManager.GetPendingConfig().Service.DNSServers,
+	}, nil
+}
+
+type CreateDNSServerParameters struct {
+	service.DNSServer
+}
+
+func (f *Service) CreateDNSServer(ctx context.Context, params CreateDNSServerParameters) (struct{}, error) {
+	t, conf := f.ConfigManager.StartTransaction()
+	defer t.Discard()
+
+	conf.Service.DNSServers = append(conf.Service.DNSServers, params.DNSServer)
+	return struct{}{}, t.Commit()
+}
+
+type UpdateDNSServerParameters struct {
+	Index     uint64            `json:"index"`
+	DNSServer service.DNSServer `json:"dns_server"`
+}
+
+func (f *Service) UpdateDNSServer(ctx context.Context, params UpdateDNSServerParameters) (struct{}, error) {
+	if int(params.Index) >= len(f.ConfigManager.GetPendingConfig().Service.DNSServers) {
+		return struct{}{}, fmt.Errorf("DNSServer does not Exist")
+	}
+
+	t, conf := f.ConfigManager.StartTransaction()
+	defer t.Discard()
+
+	conf.Service.DNSServers[params.Index] = params.DNSServer
+	return struct{}{}, t.Commit()
+}
+
+type DeleteDNSServerParameters struct {
+	Index uint64 `json:"index"`
+}
+
+func (f *Service) DeleteDNSServer(ctx context.Context, params DeleteDNSServerParameters) (struct{}, error) {
+	if int(params.Index) >= len(f.ConfigManager.GetPendingConfig().Service.DNSServers) {
+		return struct{}{}, fmt.Errorf("DNSServer does not Exist")
+	}
+
+	t, conf := f.ConfigManager.StartTransaction()
+	defer t.Discard()
+
+	conf.Service.DNSServers = append(conf.Service.DNSServers[:params.Index], conf.Service.DNSServers[params.Index+1:]...)
+	return struct{}{}, t.Commit()
+}