Initial commit

lib/utils/client_download_content_extension.dart

@@ -0,0 +1,109 @@
+// SPDX-FileCopyrightText: 2019-Present Christian Kußowski
+// SPDX-FileCopyrightText: 2019-Present Contributors to FluffyChat
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import 'dart:math' show min;
+import 'dart:typed_data';
+import 'dart:ui';
+
+import 'package:matrix/matrix.dart';
+
+extension ClientDownloadContentExtension on Client {
+  Future<Uint8List> downloadMxcCached(
+    Uri mxc, {
+    num? width,
+    num? height,
+    bool isThumbnail = false,
+    bool? animated,
+    ThumbnailMethod? thumbnailMethod,
+    bool rounded = false,
+  }) async {
+    // To stay compatible with previous storeKeys:
+    final cacheKey = isThumbnail
+        // ignore: deprecated_member_use
+        ? mxc.getThumbnail(
+            this,
+            width: width,
+            height: height,
+            animated: animated,
+            method: thumbnailMethod,
+          )
+        : mxc;
+
+    final cachedData = await database.getFile(cacheKey);
+    if (cachedData != null) return cachedData;
+
+    final httpUri = isThumbnail
+        ? await mxc.getThumbnailUri(
+            this,
+            width: width,
+            height: height,
+            animated: animated,
+            method: thumbnailMethod,
+          )
+        : await mxc.getDownloadUri(this);
+
+    final response = await httpClient.get(
+      httpUri,
+      headers: accessToken == null
+          ? null
+          : {'authorization': 'Bearer $accessToken'},
+    );
+    if (response.statusCode != 200) {
+      unexpectedResponse(response, response.bodyBytes);
+    }
+    var imageData = response.bodyBytes;
+
+    if (rounded) {
+      imageData = await _convertToCircularImage(
+        imageData,
+        min(width ?? 64, height ?? 64).round(),
+      );
+    }
+
+    await database.storeFile(cacheKey, imageData, 0);
+
+    return imageData;
+  }
+}
+
+Future<Uint8List> _convertToCircularImage(
+  Uint8List imageBytes,
+  int size,
+) async {
+  final codec = await instantiateImageCodec(imageBytes);
+  final frame = await codec.getNextFrame();
+  final originalImage = frame.image;
+
+  final recorder = PictureRecorder();
+  final canvas = Canvas(recorder);
+
+  final paint = Paint();
+  final rect = Rect.fromLTWH(0, 0, size.toDouble(), size.toDouble());
+
+  final clipPath = Path()
+    ..addOval(
+      Rect.fromCircle(center: Offset(size / 2, size / 2), radius: size / 2),
+    );
+
+  canvas.clipPath(clipPath);
+
+  canvas.drawImageRect(
+    originalImage,
+    Rect.fromLTWH(
+      0,
+      0,
+      originalImage.width.toDouble(),
+      originalImage.height.toDouble(),
+    ),
+    rect,
+    paint,
+  );
+
+  final picture = recorder.endRecording();
+  final circularImage = await picture.toImage(size, size);
+
+  final byteData = await circularImage.toByteData(format: ImageByteFormat.png);
+  return byteData!.buffer.asUint8List();
+}