Can crop image

lib/ui/dialogs/pick_file_dialog.dart

@@ -1,5 +1,6 @@
 import 'package:comunic/models/api_request.dart';
 import 'package:comunic/ui/dialogs/record_audio_dialog.dart';
+import 'package:comunic/ui/routes/image_editor_route.dart';
 import 'package:comunic/utils/files_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
@@ -132,6 +133,8 @@ Future<BytesFile> showPickFileDialog({
 
       file = BytesFile(image.path.split("/").last, await image.readAsBytes());
 
+      file = await showImageCropper(context, file);
+
       break;
 
     // Pick an video

lib/ui/routes/image_editor_route.dart

@@ -0,0 +1,53 @@
+import 'dart:io';
+
+import 'package:comunic/models/api_request.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:comunic/utils/log_utils.dart';
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/material.dart';
+import 'package:image_cropper/image_cropper.dart';
+
+import '../../models/api_request.dart';
+import '../../utils/files_utils.dart';
+
+/// Image cropper route
+///
+/// @author Pierre Hubert
+
+/// Attempt to crop image
+///
+/// Return original image in case of error / if the user did not crop the image
+Future<BytesFile> showImageCropper(
+    BuildContext context, BytesFile source) async {
+  assert(context != null);
+  assert(source != null);
+
+  File file;
+  File cropped;
+
+  try {
+    file = await generateTemporaryFile();
+    await file.writeAsBytes(source.bytes);
+
+    File cropped = await ImageCropper.cropImage(
+      sourcePath: file.absolute.path,
+      compressFormat: ImageCompressFormat.png,
+      androidUiSettings: AndroidUiSettings(
+        toolbarColor: Colors.black,
+        toolbarTitle: tr("Crop Photo"),
+        toolbarWidgetColor: Colors.white,
+      ),
+    );
+
+    if (cropped == null) return null;
+
+    return BytesFile("cropped.png", await cropped.readAsBytes());
+  } catch (e, s) {
+    logError(e, s);
+    snack(context, tr("Failed to execute image cropper!"));
+    return source;
+  } finally {
+    if (file != null && await file.exists()) file.delete();
+    if (cropped != null && await cropped.exists()) cropped.delete();
+  }
+}

lib/utils/files_utils.dart

@@ -1,6 +1,11 @@
+import 'dart:io';
+
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:flutter/material.dart';
 import 'package:image_picker/image_picker.dart';
+import 'package:path/path.dart' as path;
+import 'package:path_provider/path_provider.dart';
+import 'package:random_string/random_string.dart';
 
 /// Files utilities
 ///
@@ -46,6 +51,16 @@ Future<PickedFile> pickImage(BuildContext context) async {
           : ImageSource.gallery);
 }
 
+/// Generate a new temporary file
+///
+/// Throws in case of failure
+Future<File> generateTemporaryFile() async {
+  final tempDir = await getTemporaryDirectory();
+  if (tempDir == null)
+    throw Exception("Could not generate temporary directory!");
+  return File(path.join(tempDir.path, randomString(15, from: 65, to: 90)));
+}
+
 /// Check if a mime type maps to an image or not
 bool isImage(String mimeType) => mimeType.startsWith("image/");
 

lib/utils/video_utils.dart

@@ -3,11 +3,10 @@ import 'dart:io';
 import 'package:comunic/models/api_request.dart';
 import 'package:comunic/utils/log_utils.dart';
 import 'package:flutter/material.dart';
-import 'package:path/path.dart' as path;
-import 'package:path_provider/path_provider.dart';
-import 'package:random_string/random_string.dart';
 import 'package:video_thumbnail/video_thumbnail.dart';
 
+import 'files_utils.dart';
+
 /// Video utilities
 ///
 /// @author Pierre Hubert
@@ -20,9 +19,7 @@ Future<BytesFile> generateVideoThumbnail({
   File file;
 
   try {
-    final tempDir = await getTemporaryDirectory();
-    if (tempDir == null) return null;
-    file = File(path.join(tempDir.path, randomString(15, from: 65, to: 90)));
+    file = await generateTemporaryFile();
 
     await file.writeAsBytes(videoFile.bytes);