Split off the Events subsystem from the server class and set it up for easy expansion later.

src/server/EventWatcher.cpp

@@ -0,0 +1,60 @@
+// ===============================
+//  PC-BSD REST API Server
+// Available under the 3-clause BSD License
+// Written by: Ken Moore <ken@pcbsd.org> 2015-2016
+// =================================
+#include "EventWatcher.h"
+
+// === PUBLIC ===
+EventWatcher::EventWatcher(){
+  watcher = new QFileSystemWatcher(this);
+	
+  connect(watcher, SIGNAL(fileChanged(const QString&)), this, SLOT(WatcherUpdate(QString)) );
+  connect(watcher, SIGNAL(directoryChanged(const QString&)), this, SLOT(WatcherUpdate(QString)) );
+}
+
+EventWatcher::~EventWatcher(){
+	
+}
+
+void EventWatcher::start(){
+  // - DISPATCH Events
+  if(!QFile::exists(DISPATCHWORKING)){ QProcess::execute("touch "+DISPATCHWORKING); }
+  qDebug() << " Dispatcher Events:" << DISPATCHWORKING;
+  watcher->addPath(DISPATCHWORKING);
+  WatcherUpdate(DISPATCHWORKING); //load it initially
+}
+
+QString EventWatcher::lastEvent(EVENT_TYPE type){
+  if(HASH.contains(type)){ return HASH.value(type); }
+  else{ return ""; }
+}
+
+// === PRIVATE ===
+QString EventWatcher::readFile(QString path){
+  QFile file(path);
+  if(!file.open(QIODevice::ReadOnly | QIODevice::Text)){ return ""; }
+  QTextStream in(&file);
+  QString contents = in.readAll();
+  file.close();
+  if(contents.endsWith("\n")){ contents.chop(1); }
+  return contents;  
+}
+
+// === PRIVATE SLOTS ===
+void EventWatcher::WatcherUpdate(QString path){
+  if(path==DISPATCHWORKING){
+    //Read the file contents
+    QString stat = readFile(DISPATCHWORKING);
+    if(stat.simplified().isEmpty()){ stat = "idle"; }
+    qDebug() << "Dispatcher Update:" << stat;
+    HASH.insert(DISPATCHER,stat); //save for later
+    //Forward those contents on to the currently-open sockets
+    emit NewEvent(DISPATCHER, stat);
+  }
+  
+  //Make sure this file/dir is not removed from the watcher
+  if(!watcher->files().contains(path) && !watcher->directories().contains(path)){
+    watcher->addPath(path); //re-add it to the watcher. This happens when the file is removed/re-created instead of just overwritten
+  }
+}