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package xlogo.storage;
import java.io.File;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import net.samuelcampos.usbdrivedectector.USBDeviceDetectorManager;
import net.samuelcampos.usbdrivedectector.USBStorageDevice;
import net.samuelcampos.usbdrivedectector.events.IUSBDriveListener;
import net.samuelcampos.usbdrivedectector.events.USBStorageEvent;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import xlogo.storage.workspace.WorkspaceConfig;
import xlogo.storage.workspace.WorkspaceConfigJSONSerializer;
import xlogo.storage.workspace.WorkspaceConfig.WorkspaceProperty;
public class USBWorkspaceManager {
private static Logger logger = LogManager.getLogger(USBWorkspaceManager.class.getSimpleName());
private USBDeviceDetectorManager driveDetector;
private WorkspaceContainer wm;
private Map<String, StorableObject<WorkspaceConfig, WorkspaceProperty>> usbWorkspaces;
public USBWorkspaceManager(WorkspaceContainer workspaceManager) {
this.wm = workspaceManager;
usbWorkspaces = new HashMap<String, StorableObject<WorkspaceConfig, WorkspaceProperty>>();
}
/**
* Detect External Drives
*/
public void init() {
if (driveDetector != null) { return; }
driveDetector = new USBDeviceDetectorManager(800);
for (USBStorageDevice rmDevice : driveDetector.getRemovableDevices()) {
if (rmDevice.canRead() && rmDevice.canWrite()) {
addUSBDrive(rmDevice);
}
}
driveDetector.addDriveListener(new IUSBDriveListener(){
@Override
public void usbDriveEvent(USBStorageEvent event) {
USBStorageDevice rmDevice = event.getStorageDevice();
switch (event.getEventType()) {
case CONNECTED:
addUSBDrive(rmDevice);
break;
case REMOVED:
removeUSBDrive(rmDevice);
break;
}
}
});
}
public void stop() {
driveDetector.stop();
}
private void addUSBDrive(USBStorageDevice rmDevice) {
logger.trace("USB Drive attached: " + rmDevice);
StorableObject<WorkspaceConfig, WorkspaceProperty> usbwc = initUSBDrive(rmDevice);
if (usbwc != null && usbwc.get() == null) {
// TODO fail case
return;
}
usbWorkspaces.put(usbwc.get().getWorkspaceName(), usbwc);
wm.add(usbwc);
}
private void removeUSBDrive(USBStorageDevice rmDevice) {
logger.trace("USB Drive removed: " + rmDevice);
String deviceName = rmDevice.getSystemDisplayName();
StorableObject<WorkspaceConfig, WorkspaceProperty> usbwc = usbWorkspaces.get(deviceName);
wm.remove(usbwc);
// remove cached version from the same workspace
//File usbRoot = rmDevice.getRootDirectory();
//File usbWsDir = StorableObject.getDirectory(usbRoot, WorkspaceConfig.USB_DEFAULT_WORKSPACE);
//ObjectCache.getInstance().remove(usbWsDir, WorkspaceConfig.class);
}
private StorableObject<WorkspaceConfig, WorkspaceProperty> initUSBDrive(USBStorageDevice rmDevice) {
logger.trace("Initializing USB Drive: " + rmDevice.getDeviceName());
String deviceName = rmDevice.getSystemDisplayName();
File usbRoot = rmDevice.getRootDirectory();
File usbWsDir = StorableObject.getDirectory(usbRoot, WorkspaceConfig.USB_DEFAULT_WORKSPACE);
StorableObject<WorkspaceConfig, WorkspaceProperty> usbwc = WorkspaceConfigJSONSerializer.createOrLoad(usbWsDir, true, true);
try {
usbwc = usbwc.createOrLoad();
usbwc.get().setDirectory(usbWsDir);
usbwc.get().setWorkspaceName(deviceName);
}
catch (Exception e) {
// TODO
e.printStackTrace();
return null;
}
return usbwc;
}
public StorableObject<WorkspaceConfig, WorkspaceProperty> createOrLoad(String deviceName) {
logger.trace("Initializing USB Drive: " + deviceName);
File usbRoot = null;
for (USBStorageDevice device : driveDetector.getRemovableDevices()) {
if (deviceName.equals(device.getSystemDisplayName())) {
usbRoot = device.getRootDirectory();
break;
}
}
if (usbRoot == null) { return null; }
File usbWsDir = StorableObject.getDirectory(usbRoot, WorkspaceConfig.USB_DEFAULT_WORKSPACE);
StorableObject<WorkspaceConfig, WorkspaceProperty> wsc = WorkspaceConfigJSONSerializer.createOrLoad(usbWsDir, true);
wsc.get().setWorkspaceName(deviceName);
return wsc;
}
public String getFirstUSBWorkspace(String[] workspaceNamesc) {
for (String ws : workspaceNamesc) {
if (isUSBDrive(ws)) {
return ws;
}
}
return null;
}
public boolean isUSBDrive(String workspaceName) {
if (driveDetector == null) { return false; }
List<USBStorageDevice> devices = driveDetector.getRemovableDevices();
logger.trace("Is '" + workspaceName + "' on a USB Drive?");
for (USBStorageDevice device : devices) {
if (workspaceName.contains(device.getSystemDisplayName())) {
logger.trace("\t = Yes, corresponding USB Device found.");
return true;
}
else {
logger.trace("\t Does not correspond to " + device.getSystemDisplayName());
}
}
logger.trace("\t = No, could not find corresponding USB Drive.");
return false;
}
public File getWorkspaceDirectory(String workspaceName){
if (driveDetector == null) { return null; }
if(usbWorkspaces.containsKey(workspaceName)){
return usbWorkspaces.get(workspaceName).getLocation();
}
List<USBStorageDevice> devices = driveDetector.getRemovableDevices();
logger.trace("Is '" + workspaceName + "' on a USB Drive?");
for (USBStorageDevice device : devices) {
if (workspaceName.contains(device.getSystemDisplayName())) {
logger.trace("\t = Yes, corresponding USB Device found.");
return new File(device.getRootDirectory().toString() + File.separator + WorkspaceConfig.USB_DEFAULT_WORKSPACE);
}
else {
logger.trace("\t Does not correspond to " + device.getSystemDisplayName());
}
}
return null;
}
public interface WorkspaceContainer {
public void add(StorableObject<WorkspaceConfig, WorkspaceProperty> wc);
public void remove(StorableObject<WorkspaceConfig, WorkspaceProperty> wc);
}
}
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