add functionality to clean button

pkg/api/resolver_query_metadata.go

@@ -28,5 +28,6 @@ func (r *queryResolver) MetadataGenerate(ctx context.Context, input models.Gener
 }
 
 func (r *queryResolver) MetadataClean(ctx context.Context) (string, error) {
-	panic("not implemented")
+	manager.GetInstance().Clean()
+	return "todo", nil
 }

pkg/manager/manager_tasks.go

@@ -133,6 +133,41 @@ func (s *singleton) Generate(sprites bool, previews bool, markers bool, transcod
 	}()
 }
 
+func (s *singleton) Clean() {
+	if s.Status != Idle {
+		return
+	}
+	s.Status = Clean
+
+	qb := models.NewSceneQueryBuilder()
+	go func() {
+		defer s.returnToIdleState()
+
+		logger.Infof("Starting cleaning of tracked files")
+		scenes, err := qb.All()
+		if err != nil {
+			logger.Errorf("failed to fetch list of scenes for cleaning")
+			return
+		}
+
+		var wg sync.WaitGroup
+		for _, scene := range scenes {
+			if scene == nil {
+				logger.Errorf("nil scene, skipping generate")
+				continue
+			}
+
+			wg.Add(1)
+
+			task := CleanTask{Scene: *scene}
+			go task.Start(&wg)
+			wg.Wait()
+		}
+
+		logger.Info("Finished Cleaning")
+	}()
+}
+
 func (s *singleton) returnToIdleState() {
 	if r := recover(); r != nil {
 		logger.Info("recovered from ", r)

pkg/manager/task_clean.go

@@ -0,0 +1,42 @@
+package manager
+
+import (
+	"context"
+	"github.com/stashapp/stash/pkg/database"
+	"github.com/stashapp/stash/pkg/logger"
+	"github.com/stashapp/stash/pkg/models"
+	"os"
+	"strconv"
+	"sync"
+)
+
+type CleanTask struct {
+	Scene models.Scene
+}
+
+func (t *CleanTask) Start(wg *sync.WaitGroup) {
+	defer wg.Done()
+
+	if t.fileExists(t.Scene.Path) {
+		logger.Debugf("Found: %s", t.Scene.Path)
+	} else {
+		logger.Debugf("Deleting missing file: %s", t.Scene.Path)
+		t.deleteScene(strconv.Itoa(t.Scene.ID))
+	}
+}
+
+func (t *CleanTask) deleteScene(id string) {
+	ctx := context.TODO()
+	qb := models.NewSceneQueryBuilder()
+	tx := database.DB.MustBeginTx(ctx, nil)
+	defer tx.Commit()
+	qb.Destroy(strconv.Itoa(t.Scene.ID), tx)
+}
+
+func (t *CleanTask) fileExists(filename string) bool {
+	info, err := os.Stat(filename)
+	if os.IsNotExist(err) {
+		return false
+	}
+	return !info.IsDir()
+}

pkg/models/querybuilder_scene.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/jmoiron/sqlx"
 	"github.com/stashapp/stash/pkg/database"
+	"github.com/stashapp/stash/pkg/logger"
 )
 
 const scenesForPerformerQuery = `
@@ -292,3 +293,19 @@ func (qb *SceneQueryBuilder) queryScenes(query string, args []interface{}, tx *s
 
 	return scenes, nil
 }
+
+func (qb *SceneQueryBuilder) Destroy(id string, tx *sqlx.Tx) error {
+
+	_, err := tx.Exec("DELETE FROM performers_scenes WHERE scene_id = ?", id)
+	if err != nil {
+		logger.Debugf("error deleting performers_scenes for scene_id: %s", err)
+		return err
+	}
+	_, err = tx.Exec("DELETE FROM scenes_tags WHERE scene_id = ?", id)
+	if err != nil {
+		logger.Debugf("error deleting scenes_tags for scene_id: %s", err)
+		return err
+	}
+
+	return executeDeleteQuery("scenes", id, tx)
+}

ui/v2/src/components/Settings/SettingsTasksPanel/SettingsTasksPanel.tsx

@@ -75,11 +75,15 @@ export const SettingsTasksPanel: FunctionComponent<IProps> = (props: IProps) =>
       <H4>Generated Content</H4>
       <GenerateButton />
       <FormGroup
-        helperText="TODO"
+        helperText="Check for missing files and remove them from the database. This is a destructive action"
         labelFor="clean"
         inline={true}
       >
-        <Button id="clean" text="Clean" onClick={() => StashService.queryMetadataClean()} />
+        <Button
+          id="clean"
+          text="Clean"
+          onClick={() => StashService.queryMetadataClean()}
+        />
       </FormGroup>
       <Divider />