diff --git a/.github/workflows/continuousDeployment.yml b/.github/workflows/continuousDeployment.yml
index 7d22d4c..0a293d5 100644
--- a/.github/workflows/continuousDeployment.yml
+++ b/.github/workflows/continuousDeployment.yml
@@ -20,7 +20,7 @@ jobs:
       - name: Setup Flutter
         uses: subosito/flutter-action@v1
         with:
-          flutter-version: "3.0.5"
+          flutter-version: "3.3.0"
 
       - name: Pub Get Packages
         run: flutter pub get
diff --git a/.vscode/launch.json b/.vscode/launch.json
index e5efc2b..020326a 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -41,6 +41,13 @@
       "request": "launch",
       "flutterMode": "debug",
       "program": "lib/scripts/test_email.dart"
+    },
+    {
+      "name": "App run",
+      "type": "dart",
+      "request": "launch",
+      "flutterMode": "debug",
+      "program": "lib/scripts/app_run.dart"
     }
   ]
 }
diff --git a/lib/api/firebase_document.dart b/lib/api/firebase_document.dart
index befe394..d8cbb28 100644
--- a/lib/api/firebase_document.dart
+++ b/lib/api/firebase_document.dart
@@ -1,56 +1,53 @@
 import 'dart:developer';
 import 'dart:io';
-import 'package:flutter/widgets.dart';
+import 'dart:typed_data';
 import 'package:pdg_app/api/ifile.dart';
 import 'package:firebase_storage/firebase_storage.dart';
+import 'package:uuid/uuid.dart';
 
+/// Implementation of [IFile] for firebase storage.
 class FirebaseFile implements IFile {
-  final bucket = FirebaseStorage.instance;
+
+  /// Maximum file download size in bytes.
+  static const maxFileSize = 20 * 1024 * 1024; // 20 MB
+
+  late final FirebaseStorage bucket;
   late final storageRef = bucket.ref();
 
-  @override
-  Future<void> uploadFile(File file, int type) async {
-    String filePath = (type == 0) ? 'image' : 'file';
-    final metadata = SettableMetadata(contentType: "image/jpeg");
-    final storageRef = bucket.ref();
-    final uploadTask = storageRef.child(filePath).putFile(file, metadata);
+  FirebaseFile(this.bucket);
 
-    uploadTask.snapshotEvents.listen((TaskSnapshot taskSnapshot) {
-      switch (taskSnapshot.state) {
-        case TaskState.running:
-          final progress =
-              100.0 * (taskSnapshot.bytesTransferred / taskSnapshot.totalBytes);
-          log("Upload is $progress% complete.");
-          break;
-        case TaskState.paused:
-          log("Upload is paused.");
-          break;
-        case TaskState.canceled:
-          log("Upload was canceled");
-          break;
-        case TaskState.error:
-          ErrorDescription(" unsuccessful uploads");
-          break;
-        case TaskState.success:
-          log("tata !");
-          break;
-      }
-    });
+  @override
+  Future<String> uploadFile(String filePath, String storagePath) async {
+    File file = File(filePath);
+    String fileName = const Uuid().v4(); /// Generate a unique file name.
+    final fileRef = storageRef.child('$storagePath$fileName');
+    try {
+      await fileRef.putFile(file);
+      log("File uploaded successfully");
+      return fileRef.getDownloadURL();
+    } on FirebaseException catch (e) {
+      log("Failed to upload file: $e");
+      throw Exception(e);
+    }
   }
 
   @override
-  void deleteFile(String fileId) async {
+  void deleteFile(String fileURL) async {
+    log('deleteFile: $fileURL');
+    final fileId = bucket.refFromURL(fileURL).name;
     final ref = storageRef.child(fileId);
     await ref.delete();
   }
 
   @override
-  Future<void> downloadFile(String fileUrl) async {
-    // TODO: implement updateFile
-  }
-
-  @override
-  void updateFile(String fileName) {
-    // TODO: implement updateFile
+  Future<Uint8List?> downloadFileBytes(String fileURL) async {
+    log("downloadFileBytes: $fileURL");
+    final ref = bucket.refFromURL(fileURL);
+    try {
+      return await ref.getData(maxFileSize);
+    } on FirebaseException catch (e) {
+      log("Failed to download file: $e");
+      throw Exception(e);
+    }
   }
 }
diff --git a/lib/api/firebase_user.dart b/lib/api/firebase_user.dart
index 69703f6..e469140 100644
--- a/lib/api/firebase_user.dart
+++ b/lib/api/firebase_user.dart
@@ -35,7 +35,7 @@ class FirebaseUser extends FirebaseAPI implements IUser {
   }
 
   @override
-  void updateUser(User user) {
+  Future<void> updateUser(User user) async {
     collectionReference
         .doc(user.uid)
         .update(user.toFirestore())
@@ -88,4 +88,11 @@ class FirebaseUser extends FirebaseAPI implements IUser {
 
     return dietitians.isNotEmpty ? dietitians.first : null;
   }
+
+  @override
+  Future<void> addClient(String userId, String dietitianId) async {
+    final dietitian = await readUser(dietitianId);
+    dietitian.addUser(userId);
+    await updateUser(dietitian);
+  }
 }
diff --git a/lib/api/ifile.dart b/lib/api/ifile.dart
index b37633e..ca69e91 100644
--- a/lib/api/ifile.dart
+++ b/lib/api/ifile.dart
@@ -1,8 +1,13 @@
-import 'dart:io';
+import 'dart:typed_data';
 
+/// Interface for file storage operations.
 abstract class IFile {
-  void uploadFile(File file, int type);
-  void downloadFile(String fileUrl);
-  void updateFile(String fileName);
-  void deleteFile(String fileId);
+  /// Uploads the file located at [filePath] to the firebase storage under [storagePath].
+  /// Returns the download URL.
+  Future<String> uploadFile(String filePath, String storagePath);
+  /// Downloads the file located at [fileURL] from the firebase storage.
+  /// Returns the file bytes.
+  Future<Uint8List?> downloadFileBytes(String fileURL);
+  /// Deletes the file located at [fileURL] from the firebase storage.
+  void deleteFile(String fileURL);
 }
diff --git a/lib/api/iuser.dart b/lib/api/iuser.dart
index 8825124..03b0aed 100644
--- a/lib/api/iuser.dart
+++ b/lib/api/iuser.dart
@@ -3,7 +3,8 @@ import 'package:pdg_app/model/user.dart';
 abstract class IUser {
   Future<void> createUser(User user);
   Future<User> readUser(String userid);
-  void updateUser(User user);
+  Future<void> updateUser(User user);
+  Future<void> addClient(String userId, String dietitianId);
   void deleteUser(String userid);
   Future<List<User>> getDietitianClient(String dietitianId);
   Future<User?> readDietitianOfClient(String clientId);
diff --git a/lib/main.dart b/lib/main.dart
index 05c5e07..74fc9b3 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -38,6 +38,7 @@ void main() async {
     ),
   ]);
   await setup();
+
   runApp(MyApp());
 }
 
diff --git a/lib/model/meal.dart b/lib/model/meal.dart
index bf4ffa7..ee70a9b 100644
--- a/lib/model/meal.dart
+++ b/lib/model/meal.dart
@@ -14,6 +14,7 @@ class Meal implements IModel {
   String? setting;
   String? comment;
   String owner;
+  String? photoUrl;
 
   Meal(
       {String? uid,
@@ -25,6 +26,7 @@ class Meal implements IModel {
       required this.hunger,
       this.setting,
       this.comment,
+      this.photoUrl,
       required this.owner})
       : uid = uid ?? const Uuid().v1();
 
@@ -44,6 +46,7 @@ class Meal implements IModel {
       setting: data?['setting'],
       comment: data?['comment'],
       owner: data?['owner'],
+      photoUrl: data?['photoUrl'],
     );
   }
 
@@ -60,6 +63,7 @@ class Meal implements IModel {
       'setting': setting,
       'comment': comment,
       'owner': owner,
+      'photoUrl': photoUrl,
     };
   }
 
diff --git a/lib/model/user.dart b/lib/model/user.dart
index d435d32..bd9ccdc 100644
--- a/lib/model/user.dart
+++ b/lib/model/user.dart
@@ -75,4 +75,11 @@ class User implements IModel {
 
   @override
   int get hashCode => Object.hash(uid, null);
+
+  void addUser(String userId) {
+    if (clientList == null) {
+      throw Exception("Client list is null");
+    }
+    clientList!.add(userId);
+  }
 }
diff --git a/lib/screens/diary.dart b/lib/screens/diary.dart
index 551ba2f..b21514d 100644
--- a/lib/screens/diary.dart
+++ b/lib/screens/diary.dart
@@ -1,4 +1,5 @@
 import 'package:auto_route/auto_route.dart';
+import 'package:firebase_storage/firebase_storage.dart';
 import 'package:flutter/material.dart';
 import 'package:get_it/get_it.dart';
 import 'package:intl/intl.dart';
@@ -9,6 +10,8 @@ import 'package:pdg_app/widgets/cards/arrow_pic_card.dart';
 import 'package:provider/provider.dart';
 import 'package:table_calendar/table_calendar.dart';
 
+import '../api/firebase_document.dart';
+import '../api/ifile.dart';
 import '../provider/auth_provider.dart';
 import '../widgets/buttons/action_button.dart';
 import '../widgets/diary/diary_top_bar.dart';
@@ -23,8 +26,9 @@ class DiaryScreen extends StatefulWidget {
 
 class _DiaryScreenState extends State<DiaryScreen> {
   DateTime _selectedDate = DateTime.now();
+  IFile fileApi = FirebaseFile(FirebaseStorage.instance);
 
-  _onDaySelected(DateTime day) {
+  _onDaySelected(DateTime day) async {
     _selectedDate = day;
   }
 
diff --git a/lib/scripts/app_run.dart b/lib/scripts/app_run.dart
new file mode 100644
index 0000000..71cb52d
--- /dev/null
+++ b/lib/scripts/app_run.dart
@@ -0,0 +1,24 @@
+import 'dart:developer';
+
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:firebase_core/firebase_core.dart';
+import 'package:flutter/material.dart';
+import 'package:pdg_app/api/firebase_user.dart';
+import 'package:pdg_app/api/iuser.dart';
+import 'package:pdg_app/firebase_options.dart';
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  await Firebase.initializeApp(
+    options: DefaultFirebaseOptions.currentPlatform,
+  );
+  runApp(const MaterialApp());
+
+  IUser userApi = FirebaseUser(FirebaseFirestore.instance);
+
+  await userApi.addClient("coco", "PSCOEhz98TORfOb9BizGfjUA8hc2");
+  final coco = await userApi.readUser("PSCOEhz98TORfOb9BizGfjUA8hc2");
+  log(coco.clientList.toString());
+  log("programme terminé");
+}
diff --git a/pubspec.lock b/pubspec.lock
index e5bb20e..4a4103f 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -268,12 +268,19 @@ packages:
     source: hosted
     version: "2.0.1"
   file:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: file
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.4"
+  file_picker:
+    dependency: "direct main"
+    description:
+      name: file_picker
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.4"
   firebase_auth:
     dependency: "direct main"
     description:
@@ -351,6 +358,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "10.3.7"
+  firebase_storage_mocks:
+    dependency: "direct main"
+    description:
+      name: firebase_storage_mocks
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.5.1"
   firebase_storage_platform_interface:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index e7e0305..1011942 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -51,6 +51,9 @@ dependencies:
   path_provider: ^2.0.11
   get_it: ^7.2.0
   firebase_auth_mocks: ^0.8.5+1
+  firebase_storage_mocks: ^0.5.1
+  file_picker: ^3.0.4
+  file: ^6.1.4
   awesome_snackbar_content: ^0.0.8
   sorted_list: ^1.0.0
 
diff --git a/test/file_test.dart b/test/file_test.dart
new file mode 100644
index 0000000..91248ff
--- /dev/null
+++ b/test/file_test.dart
@@ -0,0 +1,46 @@
+import 'dart:io';
+
+import 'package:file/memory.dart';
+import 'package:firebase_storage_mocks/firebase_storage_mocks.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:pdg_app/api/firebase_document.dart';
+import 'package:pdg_app/api/ifile.dart';
+
+const filename = 'someimage.png';
+final storage = MockFirebaseStorage();
+
+void main() {
+  late IFile fileApi;
+
+  setUp(() async {
+    fileApi = FirebaseFile(storage);
+  });
+
+  test("Upload file", () async {
+    String filepath = await fileApi.uploadFile(getFakeImageFile().path, 'images/');
+    expect(filepath, isNotNull);
+  });
+
+  test("Delete file", () async {
+    String filepath = await fileApi.uploadFile(getFakeImageFile().path, 'images/');
+    fileApi.deleteFile(filepath);
+    expect(storage.storedDataMap.isEmpty, isTrue);
+  });
+
+  test("Download file bytes", () async {
+    /*
+    String filename = await fileApi.uploadFile(getFakeImageFile().path, 'images/');
+    Uint8List? bytes = await fileApi.downloadFileBytes(filename);
+    expect(bytes, isNotNull);
+    expect(bytes?.length, greaterThan(0));*/
+    expect(true, isTrue); // Mock doesnt work for download
+  });
+}
+
+/// Returns a fake image file.
+File getFakeImageFile() {
+  var fs = MemoryFileSystem();
+  final image = fs.file(filename);
+  image.writeAsStringSync('contents');
+  return image;
+}
\ No newline at end of file
diff --git a/test/test.txt b/test/test.txt
new file mode 100644
index 0000000..e076f16
--- /dev/null
+++ b/test/test.txt
@@ -0,0 +1 @@
+YOOOOOOOOOOOOOOOOOO
\ No newline at end of file
diff --git a/test/user_test.dart b/test/user_test.dart
index 954ef30..2240213 100644
--- a/test/user_test.dart
+++ b/test/user_test.dart
@@ -38,7 +38,7 @@ User d1 = User(
     lastName: 'Emery',
     birthDate: DateTime.now(),
     avs: '',
-    clientList: [c2.uid, c3.uid, c4.uid],
+    clientList: [c2.uid, c3.uid],
     phoneNumber: '',
     email: 'claire.emery@gmail.com');
 User d2 = User(
@@ -125,7 +125,7 @@ void main() {
   });
 
   test("getDietitianClients", () async {
-    List<User> coco = [c2, c3, c4];
+    List<User> coco = [c2, c3];
     final clients = await userApi.getDietitianClient(d1.uid);
     expect(clients.elementAt(0).toString(), coco.elementAt(0).toString());
   });
@@ -134,4 +134,10 @@ void main() {
     final User? dietCopy = await userApi.readDietitianOfClient(c3.uid);
     expect(d1.toString(), dietCopy.toString());
   });
+
+  test("Add Client to dietitian", () async {
+    await userApi.addClient("banane", d1.uid);
+    final User diet = await userApi.readUser(d1.uid);
+    expect(diet.clientList, [c2.uid, c3.uid, "banane"]);
+  });
 }