Add RecordNode disk space check

Author: medengineer

Source/Processors/RecordNode/RecordNode.cpp

@@ -75,12 +75,31 @@ RecordNode::RecordNode()
 
 	eventMonitor = new EventMonitor();
 
+	checkDiskSpace();
+
 }
 
 RecordNode::~RecordNode()
 {
 }
 
+void RecordNode::checkDiskSpace()
+{
+	int diskSpaceWarningThreshold = 5; //GB
+
+	File dataDir(dataDirectory);
+	int64 freeSpace = dataDir.getBytesFreeOnVolume();
+
+	float avaialableBytes = freeSpace / pow(2, 30); //1 GB == 2^30 bytes
+
+	if (avaialableBytes < diskSpaceWarningThreshold)
+	{
+		String msg = "Less than " + String(diskSpaceWarningThreshold) + " GB of disk space available in " + String(dataDirectory.getFullPathName());
+		msg += ". Recording may fail. Please free up space or change the recording directory.";
+		AlertWindow::showMessageBoxAsync(AlertWindow::WarningIcon, "WARNING", msg);
+	}
+}
+
 
 String RecordNode::handleConfigMessage(String msg)
 {
@@ -192,6 +211,8 @@ void RecordNode::setDataDirectory(File directory)
 {
 	dataDirectory = directory;
 	newDirectoryNeeded = true;
+
+	checkDiskSpace();
 }
 
 void RecordNode::createNewDirectory()

Source/Processors/RecordNode/RecordNode.h

@@ -160,6 +160,9 @@ class RecordNode :
 	/** Returns the parent directory for this Record Node (can be different from default directory) */
 	File getDataDirectory();
 
+	/** Checks if the current recording directory has sufficient space to record */
+	void checkDiskSpace();
+
 	/** Returns true if this Record Node is writing data*/
 	bool getRecordingStatus() const;