feat(uploads): preview storage paths, detect templates, attach covers and withdraw batches

services/api/internal/uploads/uploads_test.go

@@ -182,6 +182,26 @@ func TestExtFor(t *testing.T) {
 	}
 }
 
+func TestInitialAlbumCover(t *testing.T) {
+	s := &Service{cfg: Config{StagingDir: t.TempDir()}}
+	if cover, err := s.createCover(nil); err != nil || cover != nil {
+		t.Fatalf("missing cover = %v, %v", cover, err)
+	}
+	if _, err := s.createCover([]byte("not an image")); err == nil {
+		t.Fatal("invalid cover must be rejected")
+	}
+	data := []byte{0xff, 0xd8, 0xff, 1}
+	rel, err := s.createCover(data)
+	require.NoError(t, err)
+	require.NotNil(t, rel)
+	got, err := os.ReadFile(s.stagingAbs(*rel))
+	require.NoError(t, err)
+	assert.Equal(t, data, got)
+	second, err := s.createCover(data)
+	require.NoError(t, err)
+	assert.NotEqual(t, *rel, *second, "album batches must not overwrite each other's cover")
+}
+
 func TestReuseExistingFolders(t *testing.T) {
 	root := t.TempDir()
 	require.NoError(t, os.MkdirAll(filepath.Join(root, "Кино", "1988 - Группа крови"), 0o755))