add file upload logic (it's kinda broken rn)

backend/internal/services/media.go

@@ -0,0 +1,40 @@
+package services
+
+import (
+	"fmt"
+	"github.com/google/uuid"
+	"github.com/wisplite/raster/internal/db"
+	"github.com/wisplite/raster/internal/models"
+	"mime/multipart"
+)
+
+func UploadMedia(file *multipart.FileHeader, albumID string, accessToken string) (models.Media, error) {
+	userID, err := ValidateAccessToken(accessToken)
+	if err != nil {
+		return models.Media{}, err
+	}
+	accessLevel, err := CheckUserAlbumAccess(userID, albumID)
+	if err != nil {
+		return models.Media{}, err
+	}
+	if accessLevel < 1 {
+		return models.Media{}, fmt.Errorf("user does not have permission to upload media to this album")
+	}
+	albumPath := albumID
+	if albumID == "" {
+		albumPath = "root"
+	}
+	mediaID := uuid.New().String()
+	mediaPath := fmt.Sprintf("media/%s/%s.%s", albumPath, mediaID, file.Filename)
+	media := models.Media{
+		ID:      mediaID,
+		AlbumID: albumID,
+		Path:    mediaPath,
+		Type:    file.Header.Get("Content-Type"),
+	}
+	result := db.GetDB().Create(&media)
+	if result.Error != nil {
+		return models.Media{}, result.Error
+	}
+	return media, nil
+}