From 5e9aa63b4587846acf00d0756669c08bd4becaf2 Mon Sep 17 00:00:00 2001
From: Nikhil Tanwar <2002nikhiltanwar@gmail.com>
Date: Thu, 3 Feb 2022 16:36:59 +0530
Subject: [PATCH] Add real-time library monitoring

Adds a QFileSystemWatcher to watch over monitor directory.
Everytime directoryChange is emitted, it calls asyncLoadMonitorDir
---
 src/kiwixapp.cpp | 8 ++++++++
 src/kiwixapp.h   | 1 +
 2 files changed, 9 insertions(+)

diff --git a/src/kiwixapp.cpp b/src/kiwixapp.cpp
index ddd41a8..01de599 100644
--- a/src/kiwixapp.cpp
+++ b/src/kiwixapp.cpp
@@ -101,9 +101,13 @@ void KiwixApp::init()
             this->openZimFile(message);
         }
     });
+    connect(&m_watcher, &QFileSystemWatcher::directoryChanged, this, [=](QString monitorDir) {
+        m_library.asyncLoadMonitorDir(monitorDir);
+    });
     QString monitorDir = m_settingsManager.getMonitorDir();
     if (monitorDir != "") {
         m_library.setMonitorDirZims(m_library.getLibraryZimsFromDir(monitorDir));
+        m_watcher.addPath(monitorDir);
         m_library.asyncLoadMonitorDir(monitorDir);
     }
 }
@@ -281,7 +285,11 @@ bool KiwixApp::isCurrentArticleBookmarked()
 void KiwixApp::setMonitorDir(const QString &dir) {
     m_settingsManager.setMonitorDir(dir);
     m_library.setMonitorDirZims(QStringList());
+    for (auto path : m_watcher.directories()) {
+        m_watcher.removePath(path);
+    }
     if (dir != "") {
+        m_watcher.addPath(dir);
         m_library.asyncLoadMonitorDir(dir);
     }
 }
diff --git a/src/kiwixapp.h b/src/kiwixapp.h
index 79534a3..268e544 100644
--- a/src/kiwixapp.h
+++ b/src/kiwixapp.h
@@ -108,6 +108,7 @@ private:
     kiwix::UpdatableNameMapper m_nameMapper;
     kiwix::Server m_server;
     Translation m_translation;
+    QFileSystemWatcher m_watcher;
 
     QAction*     mpa_actions[MAX_ACTION];