feat: media duplicate purge, part 1 of 3: persisted purge settings and the purge API

test/image_test.go

@@ -29,6 +29,7 @@ type mockImageRepo struct {
 	deleteCalls   []uint32
 	createCalls   int
 	lastContent   []byte
+	onDelete      func(id uint32)
 }
 
 func newMockImageRepo() *mockImageRepo {
@@ -85,6 +86,9 @@ func (m *mockImageRepo) Get(id uint32) (imageDomain.Image, error) {
 
 func (m *mockImageRepo) Delete(id uint32) error {
 	m.deleteCalls = append(m.deleteCalls, id)
+	if m.onDelete != nil {
+		m.onDelete(id)
+	}
 	if err := m.fail.trigger("Delete"); err != nil {
 		return err
 	}