From 2a22e8d7df6b6ab28dd16c0c99d6c0e534222f4b Mon Sep 17 00:00:00 2001
From: Freek van de Ven <freek@freekvandeven.nl>
Date: Mon, 17 Feb 2025 09:40:01 +0100
Subject: [PATCH] feat: add minimum delay for fetching new and old messages
 that can be configured

---
 .../flutter_chat/lib/src/config/chat_options.dart  | 12 ++++++++++++
 .../screens/chat_detail/chat_detail_screen.dart    | 14 ++++++++++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/packages/flutter_chat/lib/src/config/chat_options.dart b/packages/flutter_chat/lib/src/config/chat_options.dart
index 8de71a9..e34ecd3 100644
--- a/packages/flutter_chat/lib/src/config/chat_options.dart
+++ b/packages/flutter_chat/lib/src/config/chat_options.dart
@@ -243,6 +243,8 @@ class ChatPaginationControls {
     this.scrollOffset = 50.0,
     this.loadingIndicatorForNewMessages = true,
     this.loadingIndicatorForOldMessages = true,
+    this.loadingNewMessageMinDuration = Duration.zero,
+    this.loadingOldMessageMinDuration = Duration.zero,
   });
 
   /// The minimum scroll offset to trigger the pagination to call for more pages
@@ -254,4 +256,14 @@ class ChatPaginationControls {
 
   /// Whether to show a loading indicator for old messages loading
   final bool loadingIndicatorForOldMessages;
+
+  /// The minimum duration for the loading indicator for new messages
+  /// to be shown. The loading indicator will wait for this duration and the
+  /// completion of [ChatService.loadNewMessagesAfter]
+  final Duration loadingNewMessageMinDuration;
+
+  /// The minimum duration for the loading indicator for old messages
+  /// to be shown. The loading indicator will wait for this duration and the
+  /// completion of [ChatService.loadOldMessagesBefore]
+  final Duration loadingOldMessageMinDuration;
 }
diff --git a/packages/flutter_chat/lib/src/screens/chat_detail/chat_detail_screen.dart b/packages/flutter_chat/lib/src/screens/chat_detail/chat_detail_screen.dart
index a6ec95e..8313e4b 100644
--- a/packages/flutter_chat/lib/src/screens/chat_detail/chat_detail_screen.dart
+++ b/packages/flutter_chat/lib/src/screens/chat_detail/chat_detail_screen.dart
@@ -260,7 +260,12 @@ class _ChatBody extends HookWidget {
 
       try {
         debugPrint("loading old messages from message: ${oldestMsg.id}");
-        await service.loadOldMessagesBefore(firstMessage: oldestMsg);
+        await Future.wait([
+          service.loadOldMessagesBefore(firstMessage: oldestMsg),
+          Future.delayed(
+            options.paginationControls.loadingOldMessageMinDuration,
+          ),
+        ]);
       } finally {
         WidgetsBinding.instance.addPostFrameCallback((_) {
           if (!scrollController.hasClients) {
@@ -285,7 +290,12 @@ class _ChatBody extends HookWidget {
       var newestMsg = messages.last;
       try {
         debugPrint("loading new messages from message: ${newestMsg.id}");
-        await service.loadNewMessagesAfter(lastMessage: newestMsg);
+        await Future.wait([
+          service.loadNewMessagesAfter(lastMessage: newestMsg),
+          Future.delayed(
+            options.paginationControls.loadingNewMessageMinDuration,
+          ),
+        ]);
       } finally {
         isLoadingNewer.value = false;
       }