From aab5b22e25cb186c53e5d33078fcbe8a48bcc304 Mon Sep 17 00:00:00 2001
From: Dale Glass <dale@daleglass.net>
Date: Sun, 27 Dec 2020 22:35:30 +0100
Subject: [PATCH] Skip duplicated log entries

This helps with log flooding. Successive repeated log messages will be skipped and counted,
the count will be output when a different message is logged.

A new option of 'keep_repeats' has been added to VIRCADIA_LOG_OPTIONS to disable this.
---
 libraries/shared/src/LogHandler.cpp | 15 ++++++++++++++-
 libraries/shared/src/LogHandler.h   |  5 +++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/libraries/shared/src/LogHandler.cpp b/libraries/shared/src/LogHandler.cpp
index 72d53f0bcb..098e5e9a80 100644
--- a/libraries/shared/src/LogHandler.cpp
+++ b/libraries/shared/src/LogHandler.cpp
@@ -64,6 +64,8 @@ LogHandler::LogHandler() {
             _shouldOutputThreadID = true;
         } else if (option == "milliseconds") {
             _shouldDisplayMilliseconds = true;
+        } else if (option == "keep_repeats") {
+            _keepRepeats = true;
         } else if (option != "") {
             fprintf(stdout, "Unrecognized option in VIRCADIA_LOG_OPTIONS: '%s'\n", option.toUtf8().constData());
         }
@@ -202,7 +204,18 @@ QString LogHandler::printMessage(LogMsgType type, const QMessageLogContext& cont
         resetColor = colorReset();
     }
 
-    fprintf(stdout, "%s%s%s", color, qPrintable(logMessage), resetColor);
+    if (_keepRepeats || _previousMessage != message) {
+        if (_repeatCount > 0) {
+            fprintf(stdout, "[Previous message was repeated %i times]\n", _repeatCount);
+        }
+
+        fprintf(stdout, "%s%s%s", color, qPrintable(logMessage), resetColor);
+        _repeatCount = 0;
+    } else {
+        _repeatCount++;
+    }
+
+    _previousMessage = message;
 #ifdef Q_OS_WIN
     // On windows, this will output log lines into the Visual Studio "output" tab
     OutputDebugStringA(qPrintable(logMessage));
diff --git a/libraries/shared/src/LogHandler.h b/libraries/shared/src/LogHandler.h
index 7bd5c69c63..71df2a4189 100644
--- a/libraries/shared/src/LogHandler.h
+++ b/libraries/shared/src/LogHandler.h
@@ -67,6 +67,11 @@ private:
     bool _shouldOutputThreadID { false };
     bool _shouldDisplayMilliseconds { false };
     bool _useColor { false };
+    bool _keepRepeats { false };
+
+    QString _previousMessage;
+    int _repeatCount { 0 };
+
 
     int _currentMessageID { 0 };
     struct RepeatedMessageRecord {