Watch changes in connected inputs

src/com/limelight/input/EvdevLoader.java

@@ -0,0 +1,92 @@
+package com.limelight.input;
+
+import com.limelight.LimeLog;
+import com.limelight.nvstream.NvConnection;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FilenameFilter;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardWatchEventKinds;
+import java.nio.file.WatchEvent;
+import java.nio.file.WatchKey;
+import java.nio.file.WatchService;
+import java.util.List;
+
+/**
+ * Class that handles input devices and a new ones when connected
+ * @author Iwan Timmer
+ */
+public class EvdevLoader implements Runnable {
+	
+	private NvConnection conn;
+	
+	private GamepadMapping mapping;
+	
+	private List<String> inputs;
+	
+	private File input;
+	private FilenameFilter filter;
+	
+	public EvdevLoader(NvConnection conn, GamepadMapping mapping, List<String> inputs) {
+		this.conn = conn;
+		this.mapping = mapping;
+		this.inputs = inputs;
+		this.input = new File("/dev/input");
+		this.filter = new FilenameFilter() {
+			@Override
+			public boolean accept(File dir, String name) {
+				return name.startsWith("event");
+			}
+		};
+	}
+	
+	public void start() throws FileNotFoundException, IOException {
+		boolean watcher = false;
+		
+		if (inputs.isEmpty()) {
+			watcher = true;
+			
+			String[] events = input.list(filter);
+			
+			for (String event:events)
+				inputs.add(new File(input, event).getAbsolutePath());
+		}
+		
+		for (String input:inputs)
+			new EvdevHandler(conn, input, mapping).start();
+		
+		if (watcher) {
+			Thread thread = new Thread(this);
+			thread.setDaemon(true);
+			thread.setName("Input - Search");
+			thread.start();
+		}
+	}
+	
+	@Override
+	public void run() {
+		try {
+			Path evdev = Paths.get("/dev/input");
+			
+			WatchService watcher = evdev.getFileSystem().newWatchService();
+			evdev.register(watcher, StandardWatchEventKinds.ENTRY_CREATE);
+			
+			WatchKey watckKey = watcher.take();
+			List<WatchEvent<?>> events = watckKey.pollEvents();
+			for (WatchEvent event:events) {
+				if (event.kind() == StandardWatchEventKinds.ENTRY_CREATE) {
+					String name = event.context().toString();
+					if (filter.accept(input, name)) {
+						LimeLog.info("Input " + name + " added");
+						new EvdevHandler(conn, new File(input, name).getAbsolutePath(), mapping).start();
+					}
+				}
+			}
+		} catch (IOException | InterruptedException ex) {
+			LimeLog.severe(ex.getMessage());
+		}
+	}
+	
+}