refactor: use domain pattern

internal/modules/volumes/service.go

@@ -0,0 +1,85 @@
+package volumes
+
+import (
+	"fmt"
+	"ironmount/internal/constants"
+	"ironmount/internal/core"
+	"ironmount/internal/db"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type VolumeService struct{}
+
+var volumeQueries = VolumeQueries{}
+
+// CreateVolume handles the creation of a new volume.
+func (v *VolumeService) CreateVolume(name string) (*db.Volume, int, error) {
+	existingVol, _ := volumeQueries.QueryVolumeByName(name)
+
+	if existingVol != nil {
+		return nil, http.StatusConflict, fmt.Errorf("volume %s already exists", name)
+	}
+
+	cfg := core.LoadConfig()
+
+	volPathHost := filepath.Join(cfg.VolumeRootHost, name)
+	volPathLocal := filepath.Join(constants.VolumeRootLocal, name)
+
+	if err := os.MkdirAll(volPathLocal, 0755); err != nil {
+		return nil, http.StatusInternalServerError, fmt.Errorf("failed to create volume directory: %w", err)
+	}
+
+	if err := volumeQueries.InsertVolume(name, volPathHost); err != nil {
+		if strings.Contains(err.Error(), "UNIQUE") {
+			return nil, http.StatusConflict, fmt.Errorf("volume %s already exists", name)
+		}
+
+		return nil, http.StatusInternalServerError, fmt.Errorf("failed to create volume in database: %w", err)
+	}
+
+	return &db.Volume{
+		Name: name,
+		Path: volPathHost,
+	}, http.StatusOK, nil
+}
+
+func (v *VolumeService) GetVolume(name string) (*db.Volume, error) {
+	vol, err := volumeQueries.QueryVolumeByName(name)
+
+	return vol, err
+}
+
+func (v *VolumeService) ListVolumes() []VolumeInfo {
+	vols, _ := volumeQueries.QueryVolumes()
+	volumes := []VolumeInfo{}
+
+	for _, vol := range vols {
+		volumes = append(volumes, VolumeInfo{
+			Name:       vol.Name,
+			Mountpoint: vol.Path,
+			CreatedAt:  vol.CreatedAt.Format(DateFormat),
+			Err:        "",
+		})
+	}
+
+	return volumes
+}
+
+func (v *VolumeService) DeleteVolume(name string) (int, error) {
+	vol, _ := volumeQueries.QueryVolumeByName(name)
+
+	if vol == nil {
+		return http.StatusNotFound, fmt.Errorf("volume %s not found", name)
+	}
+
+	if err := volumeQueries.RemoveVolume(name); err != nil {
+		return http.StatusInternalServerError, fmt.Errorf("failed to remove volume from database: %w", err)
+	}
+
+	// os.RemoveAll(vol.Path) ?? depends on whether we want to delete the actual directory
+
+	return http.StatusOK, nil
+}