added a logger for debugging

.gitignore

@@ -1,2 +1,6 @@
 
 META-INF/MANIFEST.MF
+.idea/
+libs/
+out/
+*.iml

fr/rader/billy/Logger.java

@@ -0,0 +1,125 @@
+package fr.rader.billy;
+
+import javax.swing.*;
+import java.io.*;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+public class Logger {
+
+	private final File LOG_OUTPUT = new File(System.getenv("APPDATA") + "/.minecraft/logs/billy.log");
+
+	private List<String> unusedFields = new ArrayList<>();
+
+	public void writeln(String message) {
+		write(message + "\n");
+	}
+
+	public void write(String message) {
+		if(logExists()) {
+			try {
+				PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter(LOG_OUTPUT, true)));
+
+				writer.print("[" + currentTime() + "]: " + message);
+
+				writer.flush();
+				writer.close();
+			} catch (IOException ioException) {
+				ioException.printStackTrace();
+			}
+		}
+	}
+
+	public boolean logExists() {
+		return LOG_OUTPUT.exists();
+	}
+
+	public boolean createLog() {
+		try {
+			return LOG_OUTPUT.createNewFile();
+		} catch (IOException ioException) {
+			ioException.printStackTrace();
+		}
+
+		return false;
+	}
+
+	public void clearLog() {
+		LOG_OUTPUT.delete();
+
+		try {
+			LOG_OUTPUT.createNewFile();
+		} catch (IOException ioException) {
+			ioException.printStackTrace();
+		}
+	}
+
+	public String currentDate() {
+		LocalDate date = LocalDate.now();
+		DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd/MM/yyyy");
+		return date.format(formatter);
+	}
+
+	public String currentTime() {
+		LocalTime date = LocalTime.now();
+		DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss");
+		return date.format(formatter);
+	}
+
+	public String readProperties(Map<String, Object> properties) {
+		String out = "";
+
+		for(Map.Entry<String, Object> property : properties.entrySet()) {
+			out += property.getKey() + "=";
+			if(property.getValue() instanceof double[]) {
+				out += Arrays.toString((double[]) property.getValue()) + "; ";
+			} else {
+				out += property.getValue() + "; ";
+			}
+		}
+
+		return out;
+	}
+
+	public void exception(Exception exception) {
+		StringWriter sw = new StringWriter();
+		exception.printStackTrace(new PrintWriter(sw));
+		writeln("Caught exception:\n" + sw.toString().substring(0, sw.toString().length() - 2));
+	}
+
+	public void exception(Exception exception, String replay) {
+		String message = exception.getLocalizedMessage();
+		int index = Integer.parseInt(message.split("column ")[1].split(" ")[0]);
+		writeln("Crash occured here (index:" + index + "): " + replay.substring(Math.max(index - 30, 0), index));
+
+		printUnused(replay);
+		exception(exception);
+
+		writeln("Timelines dump: " + replay);
+
+		JOptionPane.showMessageDialog(null, "ERROR: " + exception.getLocalizedMessage() +
+				"\nPlease open an issue on https://github.com/Nemos59/Billy/issues, and provide the \".minecraft\\logs\\billy.log\" file.");
+	}
+
+	public void printUnused(String replay) {
+		for(String field : unusedFields) {
+			int min = replay.split(field)[0].length() - 50;
+			if(min < 0) min = 0;
+
+			writeln("Unused field: " + field + " => " + replay.split(field)[0].substring(min) + field + "\" <- HERE ");
+		}
+	}
+
+	public void addUnusedField(String field) {
+		unusedFields.add(field);
+	}
+
+	public void clearUnusedFields() {
+		unusedFields.clear();
+	}
+}

fr/rader/billy/Main.java

@@ -11,9 +11,21 @@ public class Main {
 
 	private static Main instance;
 
+	private Logger logger = new Logger();
+
 	public JCheckBoxMenuItem saveToDefaultFolder;
 
 	private void start() {
+		if(!logger.logExists()) {
+			logger.createLog();
+		} else {
+			logger.clearLog();
+		}
+
+		logger.writeln("Starting Billy");
+		logger.writeln("Current date is: " + logger.currentDate());
+
+		logger.writeln("Checking folders...");
 		// Check if every folders exists
 		File toCheck = new File(OpenReplayListener.REPLAY_RECORDINGS);
 		if(!toCheck.exists()) JOptionPane.showMessageDialog(null, "The replay_recordings folder does not exist.");
@@ -24,6 +36,7 @@ private void start() {
 		toCheck = new File(OpenReplayListener.RIGHT_SIDE);
 		if(!toCheck.exists()) toCheck.mkdirs();
 
+		logger.writeln("Creating interface");
 		createInterface();
 	}
 
@@ -96,4 +109,8 @@ private Main() {
 	public static Main getInstance() {
 		return instance;
 	}
+
+	public Logger getLogger() {
+		return this.logger;
+	}
 }

fr/rader/billy/gui/inspector/listeners/SaveKeyframeListener.java

@@ -1,5 +1,7 @@
 package fr.rader.billy.gui.inspector.listeners;
 
+import fr.rader.billy.Logger;
+import fr.rader.billy.Main;
 import fr.rader.billy.gui.inspector.TimelineInspector;
 import fr.rader.billy.timeline.Keyframe;
 
@@ -10,6 +12,8 @@
 
 public class SaveKeyframeListener implements ActionListener {
 
+	private Logger logger = Main.getInstance().getLogger();
+
 	@Override
 	public void actionPerformed(ActionEvent e) {
 		TimelineInspector timelineInspector = TimelineInspector.getInstance();
@@ -33,21 +37,33 @@ public void actionPerformed(ActionEvent e) {
 
 			boolean isSpectator = timelineInspector.spectatorKeyframeCheck.isSelected();
 
+			logger.writeln("Started saving position keyframe #" + selectedKeyframe);
+			logger.writeln("Writing timestamp: " + timestamp);
+			logger.writeln("Writing spectator: " + isSpectator);
+
 			Map<String, Object> properties = new HashMap<>();
 			properties.put("camera:rotation", rotation);
 			properties.put("camera:position", position);
 			if(isSpectator) properties.put("spectate", 1);
 
+			logger.writeln("Writing properties: " + logger.readProperties(properties));
+
 			Keyframe newKeyframe = new Keyframe(timestamp, properties);
 			timelineInspector.positionPath.getKeyframes().set(selectedKeyframe, newKeyframe);
 		} else {
 			int timestamp = Integer.parseInt(timelineInspector.keyframeTimestampField.getText());
 
 			int replayTimestamp = Integer.parseInt(timelineInspector.replayTimestampField.getText());
 
+			logger.writeln("Started saving time keyframe #" + selectedKeyframe);
+			logger.writeln("Writing keyframe timestamp: " + timestamp);
+			logger.writeln("Writing replay timestamp: " + replayTimestamp);
+
 			Map<String, Object> properties = new HashMap<>();
 			properties.put("timestamp", replayTimestamp);
 
+			logger.writeln("Writing properties: " + logger.readProperties(properties));
+
 			Keyframe newKeyframe = new Keyframe(timestamp, properties);
 			timelineInspector.timePath.getKeyframes().set(selectedKeyframe, newKeyframe);
 		}

fr/rader/billy/gui/inspector/listeners/ShiftReplayTimestampListener.java

@@ -1,5 +1,7 @@
 package fr.rader.billy.gui.inspector.listeners;
 
+import fr.rader.billy.Logger;
+import fr.rader.billy.Main;
 import fr.rader.billy.gui.inspector.TimelineInspector;
 import fr.rader.billy.timeline.Keyframe;
 
@@ -8,12 +10,16 @@
 
 public class ShiftReplayTimestampListener implements ActionListener {
 
+	private Logger logger = Main.getInstance().getLogger();
+
 	@Override
 	public void actionPerformed(ActionEvent e) {
 		TimelineInspector timelineInspector = TimelineInspector.getInstance();
 
 		int shift = (int) timelineInspector.shiftTimelineSpinner.getValue();
 
+		logger.writeln("Shifting replay timestamps: " + shift);
+
 		for(Keyframe keyframe : timelineInspector.timePath.getKeyframes()) {
 			keyframe.getProperties().replace("timestamp", (Integer) keyframe.getProperties().get("timestamp") + shift);
 		}

fr/rader/billy/gui/inspector/listeners/ShiftTimelineListener.java

@@ -1,5 +1,7 @@
 package fr.rader.billy.gui.inspector.listeners;
 
+import fr.rader.billy.Logger;
+import fr.rader.billy.Main;
 import fr.rader.billy.gui.inspector.TimelineInspector;
 import fr.rader.billy.timeline.Keyframe;
 
@@ -8,12 +10,16 @@
 
 public class ShiftTimelineListener implements ActionListener {
 
+	private Logger logger = Main.getInstance().getLogger();
+
 	@Override
 	public void actionPerformed(ActionEvent e) {
 		TimelineInspector timelineInspector = TimelineInspector.getInstance();
 
 		int shift = (int) timelineInspector.shiftTimelineSpinner.getValue();
 
+		logger.writeln("Shifting timeline: " + shift);
+
 		for(Keyframe keyframe : timelineInspector.timePath.getKeyframes()) {
 			keyframe.setTime(keyframe.getTime() + shift);
 		}

fr/rader/billy/gui/inspector/listeners/TranslateTimelineListener.java

@@ -1,13 +1,18 @@
 package fr.rader.billy.gui.inspector.listeners;
 
+import fr.rader.billy.Logger;
+import fr.rader.billy.Main;
 import fr.rader.billy.gui.inspector.TimelineInspector;
 import fr.rader.billy.timeline.Keyframe;
 
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.util.Arrays;
 
 public class TranslateTimelineListener implements ActionListener {
 
+	private Logger logger = Main.getInstance().getLogger();
+
 	@Override
 	public void actionPerformed(ActionEvent e) {
 		TimelineInspector timelineInspector = TimelineInspector.getInstance();
@@ -22,6 +27,8 @@ public void actionPerformed(ActionEvent e) {
 			position[0] += diffX;
 			position[1] += diffY;
 			position[2] += diffZ;
+
+			logger.writeln("Translating timeline: " + Arrays.toString(position));
 		}
 
 		timelineInspector.xField.setText(String.valueOf(Double.parseDouble(timelineInspector.xField.getText()) + diffX));

fr/rader/billy/gui/main/listeners/CopyTimelineListener.java

@@ -1,16 +1,21 @@
 package fr.rader.billy.gui.main.listeners;
 
+import fr.rader.billy.Logger;
+import fr.rader.billy.Main;
 import fr.rader.billy.gui.main.MainInterface;
 import fr.rader.billy.timeline.Timeline;
 
 import javax.swing.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
 public class CopyTimelineListener implements ActionListener {
 
+	private Logger logger = Main.getInstance().getLogger();
+
 	private MainInterface mainInterface;
 
 	@Override
@@ -35,6 +40,8 @@ public void actionPerformed(ActionEvent e) {
 	private void copyToList(List<String> selectedTimelines, Map<String, Timeline> fromList, Map<String, Timeline> toList, String replayName) {
 		if(replayName.equals("Open Replay")) return;
 
+		logger.writeln("Copying timelines " + Arrays.toString(selectedTimelines.toArray()) + " to '" + replayName + "'");
+
 		for(String name : selectedTimelines) {
 			String oldName = name;
 			while(toList.containsKey(name)) {

fr/rader/billy/gui/main/listeners/DeleteTimelineListener.java

@@ -1,15 +1,20 @@
 package fr.rader.billy.gui.main.listeners;
 
+import fr.rader.billy.Logger;
+import fr.rader.billy.Main;
 import fr.rader.billy.gui.main.MainInterface;
 import fr.rader.billy.timeline.Timeline;
 
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
 public class DeleteTimelineListener implements ActionListener {
 
+	private Logger logger = Main.getInstance().getLogger();
+
 	private MainInterface mainInterface;
 
 	@Override
@@ -28,6 +33,8 @@ public void actionPerformed(ActionEvent e) {
 	}
 
 	private void deleteSelectedTimelines(List<String> selectedTimelines, Map<String, Timeline> timelinesList) {
+		logger.writeln("Deleting timelines " + Arrays.toString(selectedTimelines.toArray()));
+
 		for(String name : selectedTimelines) {
 			timelinesList.remove(name);
 		}

fr/rader/billy/gui/main/listeners/MoveTimelineListener.java

@@ -1,16 +1,21 @@
 package fr.rader.billy.gui.main.listeners;
 
+import fr.rader.billy.Logger;
+import fr.rader.billy.Main;
 import fr.rader.billy.gui.main.MainInterface;
 import fr.rader.billy.timeline.Timeline;
 
 import javax.swing.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
 public class MoveTimelineListener implements ActionListener {
 
+	private Logger logger = Main.getInstance().getLogger();
+
 	private MainInterface mainInterface;
 
 	@Override
@@ -35,6 +40,8 @@ public void actionPerformed(ActionEvent e) {
 	private void moveToList(List<String> selectedTimelines, Map<String, Timeline> fromList, Map<String, Timeline> toList, String replayName) {
 		if(replayName.equals("Open Replay")) return;
 
+		logger.writeln("Moving timelines " + Arrays.toString(selectedTimelines.toArray()) + " to '" + replayName + "'");
+
 		for(String name : selectedTimelines) {
 			String oldName = name;
 			while(toList.containsKey(name)) {