Images section (#813)

* Add new configuration options
* Refactor scan/clean
* Schema changes
* Add details to galleries
* Remove redundant code
* Refine thumbnail generation
* Gallery overhaul
* Don't allow modifying zip gallery images
* Show gallery card overlays
* Hide zoom slider when not in grid mode

pkg/manager/image.go

@@ -0,0 +1,101 @@
+package manager
+
+import (
+	"archive/zip"
+	"os"
+	"strings"
+
+	"github.com/jmoiron/sqlx"
+
+	"github.com/stashapp/stash/pkg/logger"
+	"github.com/stashapp/stash/pkg/models"
+	"github.com/stashapp/stash/pkg/utils"
+)
+
+// DestroyImage deletes an image and its associated relationships from the
+// database.
+func DestroyImage(imageID int, tx *sqlx.Tx) error {
+	qb := models.NewImageQueryBuilder()
+	jqb := models.NewJoinsQueryBuilder()
+
+	_, err := qb.Find(imageID)
+	if err != nil {
+		return err
+	}
+
+	if err := jqb.DestroyImagesTags(imageID, tx); err != nil {
+		return err
+	}
+
+	if err := jqb.DestroyPerformersImages(imageID, tx); err != nil {
+		return err
+	}
+
+	if err := jqb.DestroyImageGalleries(imageID, tx); err != nil {
+		return err
+	}
+
+	if err := qb.Destroy(imageID, tx); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// DeleteGeneratedImageFiles deletes generated files for the provided image.
+func DeleteGeneratedImageFiles(image *models.Image) {
+	thumbPath := GetInstance().Paths.Generated.GetThumbnailPath(image.Checksum, models.DefaultGthumbWidth)
+	exists, _ := utils.FileExists(thumbPath)
+	if exists {
+		err := os.Remove(thumbPath)
+		if err != nil {
+			logger.Warnf("Could not delete file %s: %s", thumbPath, err.Error())
+		}
+	}
+}
+
+// DeleteImageFile deletes the image file from the filesystem.
+func DeleteImageFile(image *models.Image) {
+	err := os.Remove(image.Path)
+	if err != nil {
+		logger.Warnf("Could not delete file %s: %s", image.Path, err.Error())
+	}
+}
+
+func walkGalleryZip(path string, walkFunc func(file *zip.File) error) error {
+	readCloser, err := zip.OpenReader(path)
+	if err != nil {
+		return err
+	}
+
+	for _, file := range readCloser.File {
+		if file.FileInfo().IsDir() {
+			continue
+		}
+
+		if strings.Contains(file.Name, "__MACOSX") {
+			continue
+		}
+
+		if !isImage(file.Name) {
+			continue
+		}
+
+		err := walkFunc(file)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func countImagesInZip(path string) int {
+	ret := 0
+	walkGalleryZip(path, func(file *zip.File) error {
+		ret++
+		return nil
+	})
+
+	return ret
+}