feat: implement real cross-platform voice recording utilizing record package with mic permission configuration

whatsapp_app/android/app/src/main/AndroidManifest.xml

@@ -1,4 +1,10 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.READ_CONTACTS" />
+    <uses-permission android:name="android.permission.WRITE_CONTACTS" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
     <application
         android:label="mywhatsapp"
         android:name="${applicationName}"

whatsapp_app/lib/controllers/chat_controller.dart

@@ -1,7 +1,11 @@
 import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 import 'package:intl/intl.dart';
+import 'package:record/record.dart';
+import 'package:path_provider/path_provider.dart';
 import '../services/whatsapp_service.dart';
 import '../models/conversation_model.dart';
 import '../models/message_model.dart';
@@ -17,6 +21,13 @@ class ChatController extends GetxController {
 
   final inputCtrl = TextEditingController();
   final scrollCtrl = ScrollController();
+  final hasText = false.obs;
+
+  // Recording State
+  final audioRecord = AudioRecorder();
+  final isRecording = false.obs;
+  final recordDuration = 0.obs;
+  Timer? _recordTimer;
 
   StreamSubscription? _eventSub;
 
@@ -32,6 +43,10 @@ class ChatController extends GetxController {
       Get.find<ConversationsController>().clearUnreadCount(conversation.id);
     } catch (_) {}
 
+    inputCtrl.addListener(() {
+      hasText.value = inputCtrl.text.trim().isNotEmpty;
+    });
+
     loadMessages();
     markAsRead();
 
@@ -45,6 +60,8 @@ class ChatController extends GetxController {
       _svc.activeChatId.value = null;
     }
     _eventSub?.cancel();
+    _recordTimer?.cancel();
+    audioRecord.dispose();
     inputCtrl.dispose();
     scrollCtrl.dispose();
     super.onClose();
@@ -228,4 +245,72 @@ class ChatController extends GetxController {
       return DateFormat('MMMM d, yyyy').format(dt);
     }
   }
+
+  // ── Audio Recording Engine ───────────────────────────────────────────────
+  Future<void> startRecording() async {
+    try {
+      if (await audioRecord.hasPermission()) {
+        final tempDir = await getTemporaryDirectory();
+        final path = '${tempDir.path}/rec_${DateTime.now().millisecondsSinceEpoch}.m4a';
+        
+        await audioRecord.start(
+          const RecordConfig(encoder: AudioEncoder.aacLc),
+          path: path,
+        );
+        
+        recordDuration.value = 0;
+        isRecording.value = true;
+        
+        _recordTimer?.cancel();
+        _recordTimer = Timer.periodic(const Duration(seconds: 1), (timer) {
+          recordDuration.value++;
+        });
+      } else {
+        Get.snackbar(
+          'Permission Denied',
+          'Microphone permission is required to record voice notes.',
+          snackPosition: SnackPosition.BOTTOM,
+          backgroundColor: Colors.redAccent.withOpacity(0.8),
+          colorText: Colors.white,
+        );
+      }
+    } catch (e) {
+      print('[START RECORDING ERROR] $e');
+    }
+  }
+
+  Future<void> stopAndSendRecording() async {
+    try {
+      _recordTimer?.cancel();
+      final path = await audioRecord.stop();
+      isRecording.value = false;
+      
+      if (path != null && recordDuration.value > 0) {
+        final file = File(path);
+        if (await file.exists()) {
+          final bytes = await file.readAsBytes();
+          final base64String = base64Encode(bytes);
+          
+          await sendMediaMessage(
+            base64String,
+            'audio/mp4', // Recorded as M4A (AAC), perfect for all platforms natively!
+            'voice_note.m4a',
+          );
+        }
+      }
+    } catch (e) {
+      print('[STOP RECORDING ERROR] $e');
+    }
+  }
+
+  Future<void> cancelRecording() async {
+    try {
+      _recordTimer?.cancel();
+      await audioRecord.stop();
+      isRecording.value = false;
+      recordDuration.value = 0;
+    } catch (e) {
+      print('[CANCEL RECORDING ERROR] $e');
+    }
+  }
 }

whatsapp_app/lib/screens/chat_screen.dart

@@ -139,7 +139,47 @@ class ChatScreen extends StatelessWidget {
     color: AppTheme.surface,
     padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
     child: SafeArea(
-      child: Row(
+      child: Obx(() {
+        if (ctrl.isRecording.value) {
+          return Row(
+            children: [
+              const SizedBox(width: 12),
+              const Icon(Icons.fiber_manual_record, color: Colors.red, size: 16),
+              const SizedBox(width: 8),
+              const Text(
+                'Recording...',
+                style: TextStyle(color: Colors.red, fontWeight: FontWeight.bold, fontSize: 14),
+              ),
+              const SizedBox(width: 12),
+              Text(
+                '${(ctrl.recordDuration.value ~/ 60).toString().padLeft(2, '0')}:${(ctrl.recordDuration.value % 60).toString().padLeft(2, '0')}',
+                style: const TextStyle(color: AppTheme.textPrimary, fontSize: 14, fontFamily: 'monospace'),
+              ),
+              const Spacer(),
+              TextButton.icon(
+                icon: const Icon(Icons.delete, color: Colors.redAccent, size: 18),
+                label: const Text('Cancel', style: TextStyle(color: Colors.redAccent)),
+                onPressed: ctrl.cancelRecording,
+              ),
+              const SizedBox(width: 8),
+              GestureDetector(
+                onTap: ctrl.stopAndSendRecording,
+                child: Container(
+                  width: 44,
+                  height: 44,
+                  decoration: const BoxDecoration(
+                    color: AppTheme.primary,
+                    shape: BoxShape.circle,
+                  ),
+                  child: const Icon(Icons.check, color: Colors.white, size: 20),
+                ),
+              ),
+              const SizedBox(width: 8),
+            ],
+          );
+        }
+
+        return Row(
           children: [
             // Attachment button
             IconButton(
@@ -171,9 +211,15 @@ class ChatScreen extends StatelessWidget {
               ),
             ),
             const SizedBox(width: 8),
-          // Send button
+            // Dynamic Send / Mic Button
-          Obx(() => GestureDetector(
+            GestureDetector(
-            onTap: ctrl.sendMessage,
+              onTap: () {
+                if (ctrl.hasText.value) {
+                  ctrl.sendMessage();
+                } else {
+                  ctrl.startRecording();
+                }
+              },
               child: AnimatedContainer(
                 duration: const Duration(milliseconds: 200),
                 width: 48,
@@ -190,11 +236,17 @@ class ChatScreen extends StatelessWidget {
                           color: Colors.white,
                         ),
                       )
-                  : const Icon(Icons.send, color: Colors.white, size: 20),
+                    : Icon(
+                        ctrl.hasText.value ? Icons.send : Icons.mic,
+                        color: Colors.white,
+                        size: 20,
                       ),
-          )),
+              ),
+            ),
+            const SizedBox(width: 4),
           ],
-      ),
+        );
+      }),
     ),
   );
 

whatsapp_app/linux/flutter/generated_plugin_registrant.cc

@@ -8,6 +8,7 @@
 
 #include <audioplayers_linux/audioplayers_linux_plugin.h>
 #include <file_selector_linux/file_selector_plugin.h>
+#include <record_linux/record_linux_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) audioplayers_linux_registrar =
@@ -16,4 +17,7 @@ void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) file_selector_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "FileSelectorPlugin");
   file_selector_plugin_register_with_registrar(file_selector_linux_registrar);
+  g_autoptr(FlPluginRegistrar) record_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "RecordLinuxPlugin");
+  record_linux_plugin_register_with_registrar(record_linux_registrar);
 }

whatsapp_app/linux/flutter/generated_plugins.cmake

@@ -5,6 +5,7 @@
 list(APPEND FLUTTER_PLUGIN_LIST
   audioplayers_linux
   file_selector_linux
+  record_linux
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

whatsapp_app/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -10,6 +10,7 @@ import file_selector_macos
 import firebase_core
 import firebase_messaging
 import flutter_local_notifications
+import record_darwin
 import shared_preferences_foundation
 import sqflite_darwin
 
@@ -19,6 +20,7 @@ func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FLTFirebaseCorePlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseCorePlugin"))
   FLTFirebaseMessagingPlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseMessagingPlugin"))
   FlutterLocalNotificationsPlugin.register(with: registry.registrar(forPlugin: "FlutterLocalNotificationsPlugin"))
+  RecordPlugin.register(with: registry.registrar(forPlugin: "RecordPlugin"))
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
   SqflitePlugin.register(with: registry.registrar(forPlugin: "SqflitePlugin"))
 }

whatsapp_app/pubspec.lock

@@ -601,7 +601,7 @@ packages:
     source: hosted
     version: "1.9.1"
   path_provider:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path_provider
       sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
@@ -680,6 +680,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.2.0"
+  record:
+    dependency: "direct main"
+    description:
+      name: record
+      sha256: "2e3d56d196abcd69f1046339b75e5f3855b2406fc087e5991f6703f188aa03a6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.2.1"
+  record_android:
+    dependency: transitive
+    description:
+      name: record_android
+      sha256: "94783f08403aed33ffb68797bf0715b0812eb852f3c7985644c945faea462ba1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.1"
+  record_darwin:
+    dependency: transitive
+    description:
+      name: record_darwin
+      sha256: e487eccb19d82a9a39cd0126945cfc47b9986e0df211734e2788c95e3f63c82c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.2"
+  record_linux:
+    dependency: transitive
+    description:
+      name: record_linux
+      sha256: "74d41a9ebb1eb498a38e9a813dd524e8f0b4fdd627270bda9756f437b110a3e3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.2"
+  record_platform_interface:
+    dependency: transitive
+    description:
+      name: record_platform_interface
+      sha256: "8a81dbc4e14e1272a285bbfef6c9136d070a47d9b0d1f40aa6193516253ee2f6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.0"
   record_use:
     dependency: transitive
     description:
@@ -688,6 +728,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.6.0"
+  record_web:
+    dependency: transitive
+    description:
+      name: record_web
+      sha256: a12856d0b3dd03d336b4b10d7520a8b3e21649a06a8f95815318feaa8f07adbb
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.9"
+  record_windows:
+    dependency: transitive
+    description:
+      name: record_windows
+      sha256: "223258060a1d25c62bae18282c16783f28581ec19401d17e56b5205b9f039d78"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.7"
   rxdart:
     dependency: transitive
     description:

whatsapp_app/pubspec.yaml

@@ -23,6 +23,8 @@ dependencies:
   flutter_contacts: ^1.1.7
   image_picker: ^1.0.7
   audioplayers: ^6.0.0
+  record: ^5.1.2
+  path_provider: ^2.1.2
 
 dev_dependencies:
   flutter_test:

whatsapp_app/windows/flutter/generated_plugin_registrant.cc

@@ -9,6 +9,7 @@
 #include <audioplayers_windows/audioplayers_windows_plugin.h>
 #include <file_selector_windows/file_selector_windows.h>
 #include <firebase_core/firebase_core_plugin_c_api.h>
+#include <record_windows/record_windows_plugin_c_api.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
   AudioplayersWindowsPluginRegisterWithRegistrar(
@@ -17,4 +18,6 @@ void RegisterPlugins(flutter::PluginRegistry* registry) {
       registry->GetRegistrarForPlugin("FileSelectorWindows"));
   FirebaseCorePluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("FirebaseCorePluginCApi"));
+  RecordWindowsPluginCApiRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("RecordWindowsPluginCApi"));
 }

whatsapp_app/windows/flutter/generated_plugins.cmake

@@ -6,6 +6,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
   audioplayers_windows
   file_selector_windows
   firebase_core
+  record_windows
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST