created a specific GxsEvent for Group Statistics changes and handle it in the GUI for all friends at once every 2 min at most

retroshare-gui/src/gui/Posted/PostedDialog.cpp

@@ -69,6 +69,11 @@ void PostedDialog::handleEvent_main_thread(std::shared_ptr<const RsEvent> event)
 		case RsPostedEventCode::SUBSCRIBE_STATUS_CHANGED:   // [[fallthrough]];
             updateDisplay(true);
             break;
+
+        case RsPostedEventCode::STATISTICS_CHANGED:
+            updateGroupStatistics(e->mPostedGroupId);
+            break;
+
 		default: break;
 		}
 	}

retroshare-gui/src/gui/gxs/GxsGroupFrameDialog.cpp

@@ -59,6 +59,8 @@
 
 #define MAX_COMMENT_TITLE 32
 
+static const uint32_t DELAY_BETWEEN_GROUP_STATISTICS_UPDATE = 120; // do not update group statistics more often than once every 2 mins
+
 /*
  * Transformation Notes:
  *   there are still a couple of things that the new groups differ from Old version.
@@ -77,6 +79,8 @@ GxsGroupFrameDialog::GxsGroupFrameDialog(RsGxsIfaceHelper *ifaceImpl, QWidget *p
 	ui->setupUi(this);
 
 	mShouldUpdateMessageSummaryList = true;
+	mShouldUpdateGroupStatistics = false;
+    mLastGroupStatisticsUpdateTs=0;
 	mInitialized = false;
 	mDistSyncAllowed = allow_dist_sync;
 	mInFill = false;
@@ -204,6 +208,21 @@ void GxsGroupFrameDialog::paintEvent(QPaintEvent *pe)
 		mGroupIdsSummaryToUpdate.clear();
 	}
 
+    rstime_t now = time(nullptr);
+
+    if(mShouldUpdateGroupStatistics &&  now > DELAY_BETWEEN_GROUP_STATISTICS_UPDATE + mLastGroupStatisticsUpdateTs)
+    {
+        // This mechanism allows to gather multiple updateGroupStatistics events at once and not send too many of them at the same time.
+        // it avoids re-loadign all the group everytime a friend sends new statistics.
+
+        for(auto& groupId: mGroupStatisticsToUpdate)
+			updateGroupStatisticsReal(groupId);
+
+        mShouldUpdateGroupStatistics = false;
+        mLastGroupStatisticsUpdateTs = time(nullptr);
+        mGroupStatisticsToUpdate.clear();
+    }
+
     MainPage::paintEvent(pe);
 }
 
@@ -1106,6 +1125,12 @@ void GxsGroupFrameDialog::updateGroupSummary()
 /*********************** **** **** **** ***********************/
 
 void GxsGroupFrameDialog::updateGroupStatistics(const RsGxsGroupId &groupId)
+{
+    mGroupStatisticsToUpdate.insert(groupId);
+    mShouldUpdateGroupStatistics = true;
+}
+
+void GxsGroupFrameDialog::updateGroupStatisticsReal(const RsGxsGroupId &groupId)
 {
     RsThread::async([this,groupId]()
 	{

retroshare-gui/src/gui/gxs/GxsGroupFrameDialog.h

@@ -104,6 +104,11 @@ protected:
 
 	virtual bool getGroupData(std::list<RsGxsGenericGroupData*>& groupInfo) =0;
 	virtual bool getGroupStatistics(const RsGxsGroupId& groupId,GxsGroupStatistic& stat) =0;
+
+private:
+	void updateGroupStatisticsReal(const RsGxsGroupId &groupId);
+	void updateMessageSummaryListReal(RsGxsGroupId groupId);
+
 private slots:
 	void todo();
 
@@ -161,7 +166,6 @@ private:
 
 	void initUi();
 
-	void updateMessageSummaryListReal(RsGxsGroupId groupId);
 	void openGroupInNewTab(const RsGxsGroupId &groupId);
 	void groupSubscribe(bool subscribe);
 
@@ -205,9 +209,16 @@ private:
 	RsGxsGroupId mNavigatePendingGroupId;
 	RsGxsMessageId mNavigatePendingMsgId;
 
+    // Message summary list update
+
 	bool mShouldUpdateMessageSummaryList ; // whether we should update the counting for groups. This takes some CPU so we only do it when needed.
     std::set<RsGxsGroupId> mGroupIdsSummaryToUpdate;
 
+    // GroupStatistics update
+    bool mShouldUpdateGroupStatistics;
+    rstime_t mLastGroupStatisticsUpdateTs;
+    std::set<RsGxsGroupId> mGroupStatisticsToUpdate;
+
 	UIStateHelper *mStateHelper;
 
 	/** Qt Designer generated object */

retroshare-gui/src/gui/gxschannels/GxsChannelDialog.cpp

@@ -80,6 +80,10 @@ void GxsChannelDialog::handleEvent_main_thread(std::shared_ptr<const RsEvent> ev
             updateDisplay(true);
             break;
 
+        case RsChannelEventCode::STATISTICS_CHANGED:
+            updateGroupStatistics(e->mChannelGroupId);
+            break;
+
         default:
             break;
         }

retroshare-gui/src/gui/gxsforums/GxsForumsDialog.cpp

@@ -69,6 +69,11 @@ void GxsForumsDialog::handleEvent_main_thread(std::shared_ptr<const RsEvent> eve
         case RsForumEventCode::SUBSCRIBE_STATUS_CHANGED:
             updateDisplay(true);
             break;
+
+        case RsForumEventCode::STATISTICS_CHANGED:
+            updateGroupStatistics(e->mForumGroupId);
+            break;
+
         default:
             break;
         }