Julius Joska
4e3d7de32c
The image library copies EXIF through resize and orientation baking, and the JPEG/PNG encoders write it back out. Re-encoding alone therefore did not remove metadata: sent photos and their thumbnails could carry GPS coordinates, the camera model and the capture time. - Clear EXIF and text chunks on both the full image and the thumbnail right before encoding. - Treat decoder exceptions on malformed data like an undecodable image. - Add canStripMetadata() so the UI can warn before a format the library cannot read (HEIC, RAW) goes out as an untouched document.
60 lines
2.1 KiB
Dart
60 lines
2.1 KiB
Dart
import 'dart:typed_data';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:image/image.dart' as img;
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import 'package:sepot/core/services/image_processor.dart';
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/// Fotka z telefonu nese v EXIF polohu (GPS), model telefonu a čas focení.
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/// Nic z toho nesmí odejít — ani v odeslané fotce, ani v jejím náhledu.
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void main() {
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Uint8List photoWithGps({int width = 1200, int height = 800}) {
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final photo = img.Image(width: width, height: height);
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photo.exif.imageIfd['Make'] = 'TestPhone';
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photo.exif.gpsIfd['GPSLatitude'] = img.IfdValueRational(50, 1);
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return Uint8List.fromList(img.encodeJpg(photo));
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}
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bool hasExif(Uint8List jpeg) {
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final exif = img.decodeJpgExif(jpeg);
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return exif != null &&
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(exif.imageIfd['Make'] != null || exif.gpsIfd['GPSLatitude'] != null);
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}
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test('vstup testu opravdu nese EXIF i GPS', () {
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expect(hasExif(photoWithGps()), isTrue);
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});
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test('odeslaná fotka je bez EXIF a GPS', () async {
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final out =
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await ImageProcessor.process(photoWithGps(), mimeHint: 'image/jpeg');
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expect(hasExif(out!.bytes), isFalse);
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});
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test('zmenšovaná fotka je bez EXIF a GPS', () async {
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final out = await ImageProcessor.process(
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photoWithGps(width: 4000, height: 3000),
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mimeHint: 'image/jpeg');
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expect(hasExif(out!.bytes), isFalse);
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});
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test('náhled je bez EXIF a GPS', () async {
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final out =
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await ImageProcessor.process(photoWithGps(), mimeHint: 'image/jpeg');
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expect(hasExif(out!.thumbnailJpeg), isFalse);
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});
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test('JPEG umíme zbavit metadat', () async {
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expect(await ImageProcessor.canStripMetadata(photoWithGps()), isTrue);
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});
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// Hlavička kontejneru HEIF z iPhonu; knihovna ho nedekóduje, takže by
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// fotka odešla v originále — UI se musí zeptat.
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test('HEIC metadat zbavit neumíme', () async {
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final heic = Uint8List.fromList([
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0, 0, 0, 24, ...'ftypheic'.codeUnits, 0, 0, 0, 0,
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...'mif1heic'.codeUnits, ...List.filled(64, 0),
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]);
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expect(await ImageProcessor.canStripMetadata(heic), isFalse);
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});
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}
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