Various bug fixes (#2945)

* Only update fingerprints if changed
* Fix panic when loading primary file fails
* Fix gallery/scene association
* Fix display of scene gallery in card
* Use natural_cs collation with paths for title sorting

pkg/file/fingerprint_test.go

@@ -84,3 +84,74 @@ func TestFingerprints_Equals(t *testing.T) {
 		})
 	}
 }
+
+func TestFingerprints_ContentsChanged(t *testing.T) {
+	var (
+		value1 = 1
+		value2 = "2"
+		value3 = 1.23
+
+		fingerprint1 = Fingerprint{
+			Type:        FingerprintTypeMD5,
+			Fingerprint: value1,
+		}
+		fingerprint2 = Fingerprint{
+			Type:        FingerprintTypeOshash,
+			Fingerprint: value2,
+		}
+		fingerprint3 = Fingerprint{
+			Type:        FingerprintTypeMD5,
+			Fingerprint: value3,
+		}
+	)
+
+	tests := []struct {
+		name  string
+		f     Fingerprints
+		other Fingerprints
+		want  bool
+	}{
+		{
+			"identical",
+			Fingerprints{
+				fingerprint1,
+				fingerprint2,
+			},
+			Fingerprints{
+				fingerprint1,
+				fingerprint2,
+			},
+			false,
+		},
+		{
+			"has new",
+			Fingerprints{
+				fingerprint1,
+				fingerprint2,
+			},
+			Fingerprints{
+				fingerprint1,
+			},
+			true,
+		},
+		{
+			"has different value",
+			Fingerprints{
+				fingerprint3,
+				fingerprint2,
+			},
+			Fingerprints{
+				fingerprint1,
+				fingerprint2,
+			},
+			true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := tt.f.ContentsChanged(tt.other); got != tt.want {
+				t.Errorf("Fingerprints.ContentsChanged() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}