Slight refactor of sql code

database/sql/controller.go

@@ -0,0 +1,48 @@
+package sql
+
+import (
+	runnerErrors "garm/errors"
+	"garm/params"
+
+	"github.com/pkg/errors"
+	uuid "github.com/satori/go.uuid"
+	"gorm.io/gorm"
+)
+
+func (s *sqlDatabase) ControllerInfo() (params.ControllerInfo, error) {
+	var info ControllerInfo
+	q := s.conn.Model(&ControllerInfo{}).First(&info)
+	if q.Error != nil {
+		if errors.Is(q.Error, gorm.ErrRecordNotFound) {
+			return params.ControllerInfo{}, errors.Wrap(runnerErrors.ErrNotFound, "fetching controller info")
+		}
+		return params.ControllerInfo{}, errors.Wrap(q.Error, "fetching controller info")
+	}
+	return params.ControllerInfo{
+		ControllerID: info.ControllerID,
+	}, nil
+}
+
+func (s *sqlDatabase) InitController() (params.ControllerInfo, error) {
+	if _, err := s.ControllerInfo(); err == nil {
+		return params.ControllerInfo{}, runnerErrors.NewConflictError("controller already initialized")
+	}
+
+	newID, err := uuid.NewV4()
+	if err != nil {
+		return params.ControllerInfo{}, errors.Wrap(err, "generating UUID")
+	}
+
+	newInfo := ControllerInfo{
+		ControllerID: newID,
+	}
+
+	q := s.conn.Save(&newInfo)
+	if q.Error != nil {
+		return params.ControllerInfo{}, errors.Wrap(q.Error, "saving controller info")
+	}
+
+	return params.ControllerInfo{
+		ControllerID: newInfo.ControllerID,
+	}, nil
+}