feat: complete interactive audio player, contact resolver, unread clearance, and media sending

whatsapp_app/lib/controllers/chat_controller.dart

@@ -5,6 +5,7 @@ import 'package:intl/intl.dart';
 import '../services/whatsapp_service.dart';
 import '../models/conversation_model.dart';
 import '../models/message_model.dart';
+import 'conversations_controller.dart';
 
 class ChatController extends GetxController {
   final ConversationModel conversation;
@@ -26,6 +27,11 @@ class ChatController extends GetxController {
     super.onInit();
     _svc.activeChatId.value = conversation.id;
     
+    // Instantly clear the unread count badge in the UI
+    try {
+      Get.find<ConversationsController>().clearUnreadCount(conversation.id);
+    } catch (_) {}
+
     loadMessages();
     markAsRead();
 
@@ -93,6 +99,35 @@ class ChatController extends GetxController {
     }
   }
 
+  // ── Send Media Message ───────────────────────────────────────────────────
+  Future<void> sendMediaMessage(String base64, String mimetype, String filename, {String? caption}) async {
+    isSending.value = true;
+    try {
+      final res = await _svc.sendMedia(conversation.id, base64, mimetype, filename, caption: caption);
+      if (res['type'] == 'message_sent') {
+        final sentMsg = MessageModel.fromJson(res['data'] as Map<String, dynamic>);
+        messages.add(sentMsg);
+        _scrollToBottom();
+        
+        // Also pre-cache local base64 in mediaCache to display instantly
+        _svc.mediaCache[sentMsg.id] = base64;
+      } else {
+        Get.snackbar('Error', res['message'] ?? 'Failed to send media',
+          backgroundColor: Colors.redAccent.withOpacity(0.8),
+          colorText: Colors.white,
+        );
+      }
+    } catch (e) {
+      print('[SEND MEDIA ERROR] $e');
+      Get.snackbar('Error', 'Failed to send media: $e',
+        backgroundColor: Colors.redAccent.withOpacity(0.8),
+        colorText: Colors.white,
+      );
+    } finally {
+      isSending.value = false;
+    }
+  }
+
   // ── Mark Chat as Read ────────────────────────────────────────────────────
   Future<void> markAsRead() async {
     try {
@@ -144,17 +179,23 @@ class ChatController extends GetxController {
 
   // ── Helper: Scroll to Bottom ─────────────────────────────────────────────
   void _scrollToBottom() {
-    WidgetsBinding.instance.addPostFrameCallback((_) {
-      if (scrollCtrl.hasClients) {
-        scrollCtrl.animateTo(
-          scrollCtrl.position.maxScrollExtent,
-          duration: const Duration(milliseconds: 300),
-          curve: Curves.easeOut,
-        );
-      }
+    WidgetsBinding.instance.addPostFrameCallback((_) => _performScroll());
+    // Also trigger after a short delay to account for async layout calculations
+    Future.delayed(const Duration(milliseconds: 150), () {
+      _performScroll();
     });
   }
 
+  void _performScroll() {
+    if (scrollCtrl.hasClients) {
+      scrollCtrl.animateTo(
+        scrollCtrl.position.maxScrollExtent,
+        duration: const Duration(milliseconds: 250),
+        curve: Curves.easeOut,
+      );
+    }
+  }
+
   // ── Date Separator Logic ─────────────────────────────────────────────────
   List<dynamic> get groupedMessages {
     final list = <dynamic>[];