refactor: use domain pattern

internal/modules/volumes/handlers.go

@@ -0,0 +1,73 @@
+// Package volumes provides tools for managing volumes in the application.
+package volumes
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/rs/zerolog/log"
+)
+
+// SetupHandlers sets up the API routes for the application.
+func SetupHandlers(router *gin.Engine) {
+
+	volumeService := VolumeService{}
+
+	router.GET("/api/volumes", func(c *gin.Context) {
+		volumes := volumeService.ListVolumes()
+
+		log.Debug().Msgf("Listing volumes: %v", volumes)
+
+		c.JSON(200, gin.H{
+			"volumes": volumes,
+		})
+	})
+
+	router.POST("/api/volumes", func(c *gin.Context) {
+		var req struct {
+			Name string `json:"name" binding:"required"`
+		}
+		if err := c.ShouldBindJSON(&req); err != nil {
+			c.JSON(400, gin.H{"error": "Invalid request body"})
+			return
+		}
+
+		volume, status, err := volumeService.CreateVolume(req.Name)
+
+		if err != nil {
+			c.JSON(status, gin.H{"error": err.Error()})
+			return
+		}
+		c.JSON(status, volume)
+	})
+
+	router.GET("/api/volumes/:name", func(c *gin.Context) {
+		volume, err := volumeService.GetVolume(c.Param("name"))
+
+		if err != nil {
+			c.JSON(500, gin.H{"error": err.Error()})
+			return
+		}
+
+		if volume == nil {
+			c.JSON(404, gin.H{"error": "Volume not found"})
+			return
+		}
+
+		c.JSON(200, gin.H{
+			"name":       volume.Name,
+			"mountpoint": volume.Path,
+			"created_at": volume.CreatedAt.String(),
+			"err":        "",
+		})
+	})
+
+	router.DELETE("/api/volumes/:name", func(c *gin.Context) {
+		status, err := volumeService.DeleteVolume(c.Param("name"))
+
+		if err != nil {
+			c.JSON(status, gin.H{"error": err.Error()})
+			return
+		}
+
+		c.JSON(200, gin.H{"message": "Volume deleted successfully"})
+	})
+}

internal/modules/volumes/queries.go

@@ -0,0 +1,62 @@
+package volumes
+
+import (
+	"context"
+	"ironmount/internal/db"
+
+	"github.com/rs/zerolog/log"
+	"gorm.io/gorm"
+)
+
+type VolumeQueries struct{}
+
+func (q *VolumeQueries) QueryVolumeByName(n string) (*db.Volume, error) {
+	ctx := context.Background()
+
+	volume, err := gorm.G[*db.Volume](db.DB).Where("name = ?", n).First(ctx)
+
+	if err != nil {
+		if (err.Error() == "record not found") || (err == gorm.ErrRecordNotFound) {
+			log.Warn().Str("name", n).Msg("Volume not found")
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return volume, nil
+}
+
+func (q *VolumeQueries) InsertVolume(name, path string) error {
+	ctx := context.Background()
+	err := gorm.G[db.Volume](db.DB).Create(ctx, &db.Volume{Name: name, Path: path})
+
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (q *VolumeQueries) RemoveVolume(name string) error {
+	ctx := context.Background()
+
+	log.Info().Str("volume", name).Msg("Removing volume")
+	_, err := gorm.G[db.Volume](db.DB).Where("name = ?", name).Delete(ctx)
+
+	if err != nil {
+		log.Error().Err(err).Str("volume", name).Msg("Error removing volume")
+		return err
+	}
+	return nil
+}
+
+func (q *VolumeQueries) QueryVolumes() ([]db.Volume, error) {
+	rows, err := gorm.G[db.Volume](db.DB).Select("name", "path", "created_at").Find(context.Background())
+
+	if err != nil {
+		return []db.Volume{}, err
+	}
+
+	return rows, nil
+}

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
+}

internal/modules/volumes/types.go

@@ -0,0 +1,31 @@
+package volumes
+
+var DateFormat = "2006-01-02T15:04:05Z"
+
+type CreateVolumeBody struct {
+	Name string `json:"name" binding:"required"`
+}
+
+type CreateVolumeResponse struct {
+	Name       string `json:"name"`
+	Mountpoint string `json:"mountpoint"`
+	Err        string `json:"err,omitempty"`
+}
+
+type GetVolumeResponse struct {
+	Name       string `json:"name"`
+	Mountpoint string `json:"mountpoint"`
+	Err        string `json:"err,omitempty"`
+}
+
+type VolumeInfo struct {
+	Name       string `json:"name"`
+	Mountpoint string `json:"mountpoint"`
+	Err        string `json:"err,omitempty"`
+	CreatedAt  string `json:"created_at,omitempty"`
+}
+
+type ListVolumesResponse struct {
+	Volumes []VolumeInfo `json:"volumes"`
+	Err     string       `json:"err,omitempty"`
+}