Code cleanup

- Added license commetary to each file of module system
- Added default meta info generation for Module

.gitignore

@@ -37,3 +37,4 @@ build_packages/NSIS/*
 !build_packages/DEB
 build_packages/DEB/*
 !build_packages/DEB/template
+*.log

build.gradle

@@ -111,7 +111,9 @@ switch (OperatingSystem.current()) {
 }
 
 dependencies {
-	implementation platform("org.lwjgl:lwjgl-bom:$lwjglVersion")
+
+    implementation 'org.jetbrains:annotations:20.1.0'
+    implementation platform("org.lwjgl:lwjgl-bom:$lwjglVersion")
 
 	implementation "org.lwjgl:lwjgl"
 	implementation "org.lwjgl:lwjgl-glfw"

docs/CONTRIBUTING.md

@@ -0,0 +1,69 @@
+# Contributing Guidelines
+
+This document lists conventions adopted by Progressia developers.
+
+## git
+
+### Branches
+Progressia repository contains a `master` branch and several "feature" branches.
+
+`master` is expected to contain a version of the game suitable for demonstration and forking/branching. Do not commit directly to `master` without OLEGSHA's approval.
+- `master` must always correctly build without compiler warnings (see below).
+- `master` must always pass all unit tests.
+- `master` must always be able to launch successfully.
+- `master` must always only contain working features.
+- `master` should not contain excessive debug code.
+- `master` must always have its code and filenames formatted (see below).
+
+"Feature" branches are branches dedicated to the development of a single feature. When the feature reaches completion the branch is merged into `master` and removed. Intermediate merges into `master` may occur when some fitting milestone is reached. Intermediate merges from `master` may be done as necessary. Merges between "feature" branches should generally be avoided.
+
+When beginning work on a new feature, create a new branch based on `master` (or on another "feature" branch if absolutely necessary). Use `all-small-with-dashes` to name the branch: `add-trees` or `rebalance-plastics` are good names. Do not fix unrelated bugs or work on unrelated features in a "feature" branch - create a new one, switch to an existing one or commit directly to `master` if the changes are small enough.
+
+"Feature" branches may not be formatted properly. Formatting is required before merging into `master` or other branches.
+
+### Commits
+- Commits must leave the branch in a state that builds without compiler warnings (see below).
+- Changes should be grouped in commits semantically. Avoid committing many small related changes in sequence; if necessary, wait and accumulate them. Avoid committing unrelated changes together; if necessary, split staged changes into several commits. This should normally result in about 1-2 commits for a day's work.
+- Commit bulk changes (renaming, formatting, ...) separately. Don't ever commit whitespace changes outside formatting commits.
+- Message format:
+
+```
+Short description of changes
+<empty line>
+- Enumeration of changes
+  - Nest when appropriate
+- Use dashes only
+- List not needed for small commits
+```
+
+Example:
+
+```
+Changed packages for relations, renamed Face to ShapePart
+
+- Added BlockRelation as an abstract superclass to existing relations
+  - Must be given an absolute "up" direction before use
+- Moved AbsFace, AbsRelation and BlockRelation to .world.rels
+- Renamed Face to ShapePart to reduce confusion with AbsFace
+```
+
+- Only commit changes described in the commit message. Please double-check staged files before committing.
+- Avoid merge conflicts. Pull before committing.
+- Better sign commits than not. See: [git](https://git-scm.com/book/en/v2/Git-Tools-Signing-Your-Work), [GitHub](https://docs.github.com/en/github/authenticating-to-github/managing-commit-signature-verification).
+
+## Code
+
+### Warnings
+Make sure that all committed code contains no compiler warnings. This specifically includes unused imports, unused private members, missing `@Override`s and warnings related to generics.
+
+Warnings about unknown tokens in `@SuppressWarnings` are temporarily ignored. Please disable them in your IDE.
+
+### Code Style
+Formatting code is important.
+
+- The format is specified within the files inside `/templates_and_presets/eclipse_ide`. Import the specifications into Eclipse or IntelliJ IDEA and use the IDEs' format feature. Alternatively format the code manually in accordance with existing files.
+- Only use tabs for indentation. Never indent with spaces even when wrapping lines. This is to ensure that indentation does not break when tab width is different.
+- Don't use `I` prefix for interfaces (not `IDoable` but `Doable`).
+- Prioritize readability over compactness. Do not hesitate to use (very) long identifiers if they aid comprehension.
+- Document all mathematics unless it is trivial, especially when using math notation for variable names.
+- Use proper English when writing comments. Avoid boxes in comments. Use `//` for single-line comments.

src/main/java/ru/windcorp/progressia/client/ClientProxy.java

@@ -28,6 +28,7 @@ import ru.windcorp.progressia.client.graphics.font.Typefaces;
 import ru.windcorp.progressia.client.graphics.texture.Atlases;
 import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
 import ru.windcorp.progressia.client.localization.Localizer;
+import ru.windcorp.progressia.common.modules.TaskManager;
 import ru.windcorp.progressia.common.resource.ResourceManager;
 import ru.windcorp.progressia.common.util.crash.CrashReports;
 import ru.windcorp.progressia.server.ServerState;
@@ -57,6 +58,8 @@ public class ClientProxy implements Proxy {
 		Atlases.loadAllAtlases();
 
 		AudioSystem.initialize();
+		TaskManager.getInstance().startLoading();
+
 
 		ServerState.startServer();
 		ClientState.connectToLocalServer();

src/main/java/ru/windcorp/progressia/client/audio/AudioSystem.java

@@ -15,24 +15,38 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
- 
+
 package ru.windcorp.progressia.client.audio;
 
+import org.apache.logging.log4j.LogManager;
+import ru.windcorp.progressia.common.modules.Module;
+import ru.windcorp.progressia.common.modules.Task;
+import ru.windcorp.progressia.common.modules.TaskManager;
 import ru.windcorp.progressia.common.resource.ResourceManager;
 
 public class AudioSystem {
 	static public void initialize() {
+		Module audioModule = new Module("AudioModule:System");
 		AudioManager.initAL();
 		Thread shutdownHook = new Thread(AudioManager::closeAL, "AL Shutdown Hook");
 		Runtime.getRuntime().addShutdownHook(shutdownHook);
-		loadAudioData();
+
+		Task t = new Task("AudioSystem:Initialize") {
+			@Override
+			protected void perform() {
+				loadAudioData();
+				LogManager.getLogger().info("Audio data is loaded");
+			}
+		};
+		audioModule.addTask(t);
+		TaskManager.getInstance().registerModule(audioModule);
 	}
 
 	static void loadAudioData() {
 		AudioManager.loadSound(
-			ResourceManager.getResource("assets/sounds/block_destroy_clap.ogg"),
-			"Progressia:BlockDestroy",
-			AudioFormat.MONO
+				ResourceManager.getResource("assets/sounds/block_destroy_clap.ogg"),
+				"Progressia:BlockDestroy",
+				AudioFormat.MONO
 		);
 	}
 }

src/main/java/ru/windcorp/progressia/client/graphics/gui/Button.java

@@ -1,83 +0,0 @@
-package ru.windcorp.progressia.client.graphics.gui;
-
-import java.util.function.Consumer;
-import java.util.function.Supplier;
-
-import com.google.common.eventbus.Subscribe;
-
-import glm.mat._4.Mat4;
-import glm.vec._2.i.Vec2i;
-import org.lwjgl.glfw.GLFW;
-import ru.windcorp.progressia.client.graphics.backend.InputTracker;
-import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
-import ru.windcorp.progressia.client.graphics.font.Font;
-import ru.windcorp.progressia.client.graphics.Colors;
-import ru.windcorp.progressia.client.graphics.gui.event.FocusEvent;
-import ru.windcorp.progressia.client.graphics.gui.event.HoverEvent;
-import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
-import ru.windcorp.progressia.client.graphics.input.bus.InputListener;
-import ru.windcorp.progressia.client.graphics.input.InputEvent;
-import ru.windcorp.progressia.client.graphics.input.KeyEvent;
-
-public class Button extends Interactable {
-	
-	public <T extends InputEvent> Button(String name, Label textLabel, Consumer<Button> onClick) {//, InputListener<T> onClick, Class<? extends T> onClickClass) {
-		super(name, textLabel);
-		setPreferredSize(107,34);
-        //Button inButton = (Button) setFocusable(true);
-        
-        addListener((Class<KeyEvent>) KeyEvent.class, (InputListener<KeyEvent>) e -> {if ((e.isLeftMouseButton() && containsCursor()) || (e.getKey()==GLFW.GLFW_KEY_ENTER && isFocused()) )
-        	{
-        		isClicked = e.isPress();
-        		if (!isDisabled())
-        		{
-        			onClick.accept(this);
-        			takeFocus();
-        		}
-        		requestReassembly();
-        		return true;
-        	}
-		  	return false;});
-        							
-	}
-	
-	@Override
-	protected void assembleSelf(RenderTarget target) {
-		//Border
-		if (isDisabled())
-		{
-			target.fill(getX(), getY(), getWidth(), getHeight(), 0xFFE5E5E5);
-		}
-		else if (isClicked() || isHovered() || isFocused())
-		{
-			target.fill(getX(), getY(), getWidth(), getHeight(), 0xFF37A2E6);
-		}
-		else
-		{
-			target.fill(getX(), getY(), getWidth(), getHeight(), 0xFFCBCBD0);
-		}
-		//Inside area
-		if (!isClicked() && isHovered() && !isDisabled())
-		{
-			target.fill(getX()+2, getY()+2, getWidth()-4, getHeight()-4, 0xFFC3E4F7);
-		}
-		else if (!isClicked() || isDisabled())
-		{
-			target.fill(getX()+2, getY()+2, getWidth()-4, getHeight()-4, Colors.WHITE);
-		}
-		Font tempFont = new Font().withColor(Colors.BLACK);
-		if (isDisabled())
-		{
-			tempFont = tempFont.withColor(Colors.GRAY_A);
-		}
-		else if (isClicked())
-		{
-			tempFont = tempFont.withColor(Colors.WHITE);
-		}
-		
-		target.pushTransform(new Mat4().identity().translate( getX()+.5f*getWidth()-.5f*label.getPreferredSize().x, getY(), 0));
-		label = new Label(label.getName(), tempFont, label.getContentSupplier());
-		label.assembleSelf(target);
-		target.popTransform();
-	}
-}

src/main/java/ru/windcorp/progressia/client/graphics/gui/Checkbox.java

@@ -1,117 +0,0 @@
-package ru.windcorp.progressia.client.graphics.gui;
-
-import java.util.function.Consumer;
-import java.util.function.Supplier;
-
-import com.google.common.eventbus.Subscribe;
-
-import glm.mat._4.Mat4;
-import glm.vec._2.i.Vec2i;
-import org.lwjgl.glfw.GLFW;
-import ru.windcorp.progressia.client.graphics.backend.InputTracker;
-import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
-import ru.windcorp.progressia.client.graphics.font.Font;
-import ru.windcorp.progressia.client.graphics.Colors;
-import ru.windcorp.progressia.client.graphics.gui.event.FocusEvent;
-import ru.windcorp.progressia.client.graphics.gui.event.HoverEvent;
-import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
-import ru.windcorp.progressia.client.graphics.input.bus.InputListener;
-import ru.windcorp.progressia.client.graphics.input.InputEvent;
-import ru.windcorp.progressia.client.graphics.input.KeyEvent;
-
-public class Checkbox extends Interactable {
-
-	private boolean isActive;
-	
-	public <T extends InputEvent> Checkbox(String name, Label textLabel, Consumer<Checkbox> onSet, Consumer<Checkbox> onReset) {//, InputListener<T> onClick, Class<? extends T> onClickClass) {
-		super(name, textLabel);
-		setPreferredSize(44 + textLabel.getPreferredSize().x,textLabel.getPreferredSize().y);
-        //Checkbox inCheck = (Checkbox) setFocusable(true);
-        
-        addListener((Class<KeyEvent>) KeyEvent.class, (InputListener<KeyEvent>) e -> {if (e.isLeftMouseButton() && containsCursor()|| (e.getKey()==GLFW.GLFW_KEY_ENTER && isFocused()))
-        	{
-        		isClicked = e.isPress();
-        		if (!isDisabled())
-        		{
-        			if (!isClicked && !isActive)
-        			{
-        				onSet.accept(this);
-            			isActive = !isActive;
-        			}
-        			else if (!isClicked && isActive)
-        			{
-        				onReset.accept(this);
-            			isActive = !isActive;
-        			}
-        			else if (isClicked)
-        			{
-        				takeFocus();
-        			}
-        		}
-        		requestReassembly();
-        		return true;
-        	}
-		  	return false;});			
-	}
-	
-	public boolean isActive()
-	{
-		return isActive;
-	}
-	
-	@Override
-	protected void assembleSelf(RenderTarget target) {
-		//Border
-		if (isDisabled())
-		{
-			target.fill(getX()+label.getPreferredSize().x, getY(), getWidth()-label.getPreferredSize().x, getHeight(), 0xFFE5E5E5);
-		}
-		else if (isClicked() || isHovered() || isFocused())
-		{
-			target.fill(getX()+label.getPreferredSize().x, getY(), getWidth()-label.getPreferredSize().x, getHeight(), 0xFF37A2E6); // blue
-		}
-		else
-		{
-			target.fill(getX()+label.getPreferredSize().x, getY(), getWidth()-label.getPreferredSize().x, getHeight(), 0xFFCBCBD0);
-		}
-		//Inside area
-		if (!isClicked() && isHovered() && !isDisabled())
-		{
-			target.fill(getX()+2+label.getPreferredSize().x, getY()+2, getWidth()-label.getPreferredSize().x-4, getHeight()-4, 0xFFC3E4F7); // light blue
-		}
-		else if (!isClicked() || isDisabled())
-		{
-			target.fill(getX()+2+label.getPreferredSize().x, getY()+2, getWidth()-label.getPreferredSize().x-4, getHeight()-4, Colors.WHITE);
-		}
-		if (isActive() && !isClicked())
-		{
-			if (isDisabled())
-			{
-				target.fill(getX()+getWidth()-getHeight()+4, getY()+4, getHeight()-8, getHeight()-8, 0xFFB3D7EF);
-			}
-			else
-			{
-				target.fill(getX()+getWidth()-getHeight()+4, getY()+4, getHeight()-8, getHeight()-8, 0xFF37A2E6); // blue
-			}
-		}
-		else if (!isClicked())
-		{
-			if (isDisabled())
-			{
-				target.fill(getX()+label.getPreferredSize().x+4, getY()+4, getHeight()-8, getHeight()-8, 0xFFE5E5E5);
-			}
-			else if (isFocused() || isHovered())
-			{
-				target.fill(getX()+label.getPreferredSize().x+4, getY()+4, getHeight()-8, getHeight()-8, 0xFF37A2E6); // blue
-			}
-			else
-			{
-				target.fill(getX()+label.getPreferredSize().x+4, getY()+4, getHeight()-8, getHeight()-8, 0xFFCBCBD0);
-			}
-			target.fill(getX()+label.getPreferredSize().x+6, getY()+6, getHeight()-12, getHeight()-12, Colors.WHITE);
-		}
-		target.pushTransform(new Mat4().identity().translate( getX(), getY(), 0));
-		label.assembleSelf(target);
-		target.popTransform();
-	}
-}

src/main/java/ru/windcorp/progressia/client/graphics/gui/Interactable.java

@@ -1,62 +0,0 @@
-package ru.windcorp.progressia.client.graphics.gui;
-
-import com.google.common.eventbus.Subscribe;
-
-import ru.windcorp.progressia.client.graphics.gui.event.FocusEvent;
-import ru.windcorp.progressia.client.graphics.gui.event.HoverEvent;
-import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
-import glm.vec._2.i.Vec2i;
-
-public class Interactable extends Component {
-	
-	private Vec2i currentSize;
-	protected boolean isDisabled;
-	protected boolean isClicked;
-	protected Label label;
-	
-	public Interactable(String name, Label textLabel)
-	{
-		super(name);
-		label = textLabel;
-		addChild(textLabel);
-		
-		addListener(new Object() {
-            @Subscribe
-            public void onHoverChanged(HoverEvent e) {
-                requestReassembly();
-            }
-        });
-        
-        addListener(new Object() {
-            @Subscribe
-            public void onFocusChanged(FocusEvent e) {
-            	//inButton.setText(new Label("dummy",new Font().withColor(Colors.BLACK),e.getNewState() ? "Is Focused" : "Isn't focused"));
-                requestReassembly();
-            }
-        });
-	}
-	
-	public boolean isClicked()
-	{
-		return isClicked;
-	}
-	
-	public void setDisable(boolean isDisabled)
-	{
-		this.isDisabled = isDisabled;
-        setFocusable(isDisabled);
-	}
-	
-	public boolean isDisabled()
-	{
-		return isDisabled;
-	}
-	
-	public void setText(Label newText)
-	{
-		removeChild(label);
-		label = newText;
-		addChild(label);
-		requestReassembly();
-	}
-}

src/main/java/ru/windcorp/progressia/client/graphics/gui/RadioButton.java

@@ -1,87 +0,0 @@
-package ru.windcorp.progressia.client.graphics.gui;
-
-import java.util.function.Consumer;
-
-import org.lwjgl.glfw.GLFW;
-
-import glm.mat._4.Mat4;
-import glm.vec._2.i.Vec2i;
-import ru.windcorp.progressia.client.graphics.Colors;
-import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
-import ru.windcorp.progressia.client.graphics.input.KeyEvent;
-import ru.windcorp.progressia.client.graphics.input.bus.InputListener;
-
-public class RadioButton extends Interactable {
-	private RadioManager manager;
-	private boolean isSelected;
-
-	public RadioButton(String name, Label textLabel, Consumer<RadioButton> onSelect, RadioManager myManager)
-	{
-		super(name, textLabel);
-		setPreferredSize(textLabel.getPreferredSize().x+23,textLabel.getPreferredSize().y);
-		manager = myManager;
-		manager.addOption(this);
-		
-		addListener((Class<KeyEvent>) KeyEvent.class, (InputListener<KeyEvent>) e -> {if ((e.isLeftMouseButton() && containsCursor()) || (e.getKey()==GLFW.GLFW_KEY_ENTER && isFocused()) )
-    	{
-    		isClicked = e.isPress();
-    		if (!isDisabled() && !isClicked)
-    		{
-    			onSelect.accept(this);
-    			manager.selectSelf(this);
-    		}
-    		requestReassembly();
-    		return true;
-    	}
-	  	return false;});
-	}
-	
-	public boolean isSelected()
-	{
-		return isSelected;
-	}
-	
-	public void setSelected(boolean selected)
-	{
-		isSelected = selected;
-	}
-	
-	protected void assembleSelf(RenderTarget target) {
-		if (isDisabled())
-		{
-			target.fill(getX()+getWidth()-getHeight(), getY(), getHeight(), getHeight(), 0xFFE5E5E5);
-		}
-		else if (isClicked() || isHovered() || isFocused())
-		{
-			target.fill(getX()+getWidth()-getHeight(), getY(), getHeight(), getHeight(), 0xFF37A2E6);
-		}
-		else
-		{
-			target.fill(getX()+getWidth()-getHeight(), getY(), getHeight(), getHeight(), 0xFFCBCBD0);
-		}
-		//Inside area
-		if (!isClicked() && isHovered() && !isDisabled())
-		{
-			target.fill(getX()+getWidth()-getHeight()+2, getY()+2, getHeight()-4, getHeight()-4, 0xFFC3E4F7);
-		}
-		else if (!isClicked() || isDisabled())
-		{
-			target.fill(getX()+getWidth()-getHeight()+2, getY()+2, getHeight()-4, getHeight()-4, Colors.WHITE);
-		}
-		if (isSelected())
-		{
-			if (!isDisabled())
-			{
-				target.fill(getX()+getWidth()-getHeight()+4, getY()+4, getHeight()-8, getHeight()-8, 0xFF37A2E6);
-			}
-			else
-			{
-				target.fill(getX()+getWidth()-getHeight()+4, getY()+4, getHeight()-8, getHeight()-8, 0xFFC3E4F7);
-			}
-		}
-		
-		target.pushTransform(new Mat4().identity().translate( getX(), getY(), 0));
-		label.assembleSelf(target);
-		target.popTransform();
-	}
-}

src/main/java/ru/windcorp/progressia/client/graphics/gui/RadioManager.java

@@ -1,37 +0,0 @@
-package ru.windcorp.progressia.client.graphics.gui;
-
-import java.util.Collections;
-import java.util.List;
-import java.util.concurrent.CopyOnWriteArrayList;
-
-public class RadioManager {
-	private List<RadioButton> options;
-	private int selectedOption;
-	
-	public RadioManager()
-	{
-		options = Collections.synchronizedList(new CopyOnWriteArrayList<>());
-	}
-	
-	public void addOption(RadioButton option)
-	{
-		options.add(option);
-	}
-	
-	public int getSelected()
-	{
-		return selectedOption;
-	}
-	
-	public void selectSelf(RadioButton option)
-	{
-		if (!options.contains(option))
-		{
-			return;
-		}
-		options.get(selectedOption).setSelected(false);
-		selectedOption = options.indexOf(option);
-		option.takeFocus();
-		option.setSelected(true);
-	}
-}

src/main/java/ru/windcorp/progressia/common/modules/Module.java

@@ -0,0 +1,59 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.common.modules;
+
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
+
+import java.util.*;
+
+public class Module extends Namespaced {
+
+	private final Set<Task> tasks = new HashSet<>();
+	private final Map<String, String> meta = new HashMap<>();
+
+	/**
+	 * @param id the identifier of a task object.
+	 * Its format is restricted by {@link Namespaced}.
+	 * @see Namespaced#Namespaced
+	 */
+	public Module(String id) {
+		super(id);
+		meta.put("id", id);
+	}
+
+	/**
+	 * @return meta information of the module as {@link Map}.
+	 */
+	public Map<String, String> getMeta() {
+		return Collections.unmodifiableMap(meta);
+	}
+
+	public Set<Task> getTasks() {
+		return Collections.unmodifiableSet(tasks);
+	}
+
+	/**
+	 * @param task that will be attached to the module.
+	 * A task can't be added to any module second time.
+	 */
+	public void addTask(Task task) {
+		task.setOwner(this);
+		tasks.add(task);
+	}
+
+}

src/main/java/ru/windcorp/progressia/common/modules/ModuleBuilder.java

@@ -0,0 +1,31 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.common.modules;
+
+public class ModuleBuilder {
+	private final Module module;
+
+	public ModuleBuilder(String id) {
+		module = new Module(id);
+	}
+
+	public ModuleBuilder AddTask(Task task) {
+		module.addTask(task);
+		return this;
+	}
+}

src/main/java/ru/windcorp/progressia/common/modules/Task.java

@@ -0,0 +1,130 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.common.modules;
+
+import ru.windcorp.jputil.chars.StringUtil;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
+
+import java.util.*;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+public abstract class Task
+		extends Namespaced
+		implements Runnable {
+
+	private final Set<Task> requiredTasks = new HashSet<>();
+	private final AtomicBoolean isDone = new AtomicBoolean(false);
+	private final AtomicBoolean isActive = new AtomicBoolean(false);
+	private Module owner;
+
+	/**
+	 * @param id the identifier of a task object.
+	 * Its format is restricted by {@link Namespaced}.
+	 * @see Namespaced#Namespaced
+	 */
+	protected Task(String id) {
+		super(id);
+	}
+
+	@Override
+	public void run() {
+		if (!canRun()) {
+			List<Task> undoneTasks = new ArrayList<>();
+			for (Iterator<Task> iterator = requiredTasks.iterator(); iterator.hasNext(); ) {
+				Task t = iterator.next();
+				if (!t.isDone()) {
+					undoneTasks.add(t);
+				}
+			}
+
+			throw CrashReports.report(new Throwable(),
+					"The following required Tasks are not done:\n%s",
+					StringUtil.iterableToString(undoneTasks, "\n"));
+		} else if (isDone()) {
+			throw CrashReports.report(new Throwable(),
+					"The task cannot be performed second time");
+		} else {
+			isActive.set(true);
+			perform();
+			isActive.set(false);
+			isDone.set(true);
+		}
+	}
+
+	/**
+	 * The method is to be invoked in run().
+	 * @see Task#run()
+	 */
+	protected abstract void perform();
+
+	public boolean isDone() {
+		return isDone.get();
+	}
+
+	/**
+	 * @return if the {@link Task#run()} method is being invoked at the moment or not.
+	 */
+	public boolean isActive() {
+		return isActive.get();
+	}
+
+	/**
+	 *
+	 * @return true - the method is not done and not active
+	 * and all requirement tasks are done, false - otherwise.
+	 */
+	public boolean canRun() {
+		if (this.isActive.get() || isDone.get()) return false;
+		for (Iterator<Task> iterator = requiredTasks.iterator(); iterator.hasNext(); ) {
+			Task reqTask = iterator.next();
+			if (!reqTask.isDone()) return false;
+		}
+		return true;
+	}
+
+	public Set<Task> getRequiredTasks() {
+		return Collections.unmodifiableSet(requiredTasks);
+	}
+
+	public void addRequiredTask(Task task) {
+		requiredTasks.add(task);
+	}
+
+	/**
+	 * @return the module the task is attached to.
+	 */
+	public Module getOwner() {
+		return owner;
+	}
+
+	/**
+	 * @param module to which the task will be attached.
+	 * Only one module can be the owner of the task.
+ 	 */
+	public void setOwner(Module module) {
+		if (owner != null) {
+			throw CrashReports.crash(
+					null
+					, "Could not set %s as owner of %s, because %s is already owner of it.",
+					module.getId(), this.getId(), this.owner.getId());
+		} else {
+			owner = module;
+		}
+	}
+}

src/main/java/ru/windcorp/progressia/common/modules/TaskManager.java

@@ -0,0 +1,173 @@
+/*
+ * Progressia
+ * Copyright (C)  2020-2021  Wind Corporation and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package ru.windcorp.progressia.common.modules;
+
+import org.apache.logging.log4j.LogManager;
+import ru.windcorp.progressia.common.util.crash.CrashReports;
+import ru.windcorp.progressia.common.util.namespaces.Namespaced;
+
+import java.util.*;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import static java.util.concurrent.Executors.newFixedThreadPool;
+
+public final class TaskManager {
+	private static final TaskManager INSTANCE = new TaskManager();
+
+	private final Set<Task> tasks = new HashSet<>();
+	private final Set<Module> modules = new HashSet<>();
+	private final ExecutorService executorService;
+
+	final AtomicBoolean loadingDone;
+	final AtomicInteger activeThreadsCount;
+
+	private final Map<Thread, Namespaced> loadersMonitorMap;
+
+	private TaskManager() {
+		loadingDone = new AtomicBoolean(false);
+		activeThreadsCount = new AtomicInteger(0);
+		executorService = newFixedThreadPool(
+				Runtime.getRuntime().availableProcessors(), Thread::new);
+		loadersMonitorMap = new HashMap<>(Runtime.getRuntime().availableProcessors());
+	}
+
+	public static TaskManager getInstance() {
+		return TaskManager.INSTANCE;
+	}
+
+	/**
+	 * Registers the module and its tasks that are
+	 * to be performed by {@link TaskManager#startLoading()}.
+	 *
+	 * @param module from where to register tasks for loading.
+	 */
+	public void registerModule(Module module) {
+		tasks.addAll(module.getTasks());
+		modules.add(module);
+	}
+
+	/**
+	 * Registers a task that is to be performed
+	 * by {@link TaskManager#startLoading()}.
+	 *
+	 * @param task to register for loading.
+	 */
+	public void addTask(Task task) {
+		tasks.add(task);
+	}
+
+	public boolean isLoadingDone() {
+		return loadingDone.get();
+	}
+
+	/**
+	 * The method to start loading. It will perform every registered task.
+	 */
+	public void startLoading() {
+		LogManager.getLogger().info("Loading is started");
+		int procAmount = Runtime.getRuntime().availableProcessors();
+		for (int i = 0; i < procAmount; i++) {
+			executorService.submit(loaderTask);
+		}
+
+		waitForLoadingEnd();
+		if (!tasks.isEmpty()) {
+			throw CrashReports.crash(null, "Loading is failed");
+		}
+		LogManager.getLogger().info("Loading is finished");
+		executorService.shutdownNow();
+	}
+
+	/**
+	 * @return Task - founded registered task with {@link Task#canRun()} = true;
+	 * null - there is no available task found.
+	 * @see Task#canRun()
+	 */
+	synchronized Task getRunnableTask() {
+		if (!tasks.isEmpty()) {
+			for (Iterator<Task> iterator = tasks.iterator(); iterator.hasNext(); ) {
+				Task t = iterator.next();
+				if (t.canRun()) {
+					tasks.remove(t);
+					return t;
+				}
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * Makes the thread that is performing this method
+	 * to wait until the loading is not done.
+	 */
+	private void waitForLoadingEnd() {
+		synchronized (tasks) {
+			while (!loadingDone.get()) {
+				try {
+					tasks.wait();
+				} catch (InterruptedException ignored) {}
+			}
+		}
+	}
+
+	private void stopLoading() {
+		loadingDone.set(true);
+		synchronized (tasks) {
+			tasks.notifyAll();
+		}
+	}
+
+	/**
+	 * @return a map where key is a thread making loading
+	 * and where value is a {@link Namespaced} of {@link Task} that is being performed by it
+	 * at the moment.
+	 * @see Namespaced
+	 */
+	public Map<Thread, Namespaced> getLoadersMonitorMap() {
+		return Collections.unmodifiableMap(loadersMonitorMap);
+	}
+
+	private final Runnable loaderTask = new Runnable() {
+		@Override
+		public void run() {
+			while (!loadingDone.get()) {
+				Task t = getRunnableTask();
+				if (t != null) {
+					activeThreadsCount.incrementAndGet();
+					loadersMonitorMap.put(Thread.currentThread(), t);
+					t.run();
+					loadersMonitorMap.put(Thread.currentThread(), null);
+					activeThreadsCount.decrementAndGet();
+					synchronized (tasks) {
+						tasks.notifyAll();
+					}
+				} else if (activeThreadsCount.get() > 0) {
+					try {
+						synchronized (tasks) {
+							tasks.wait();
+						}
+					} catch (InterruptedException ignored) {}
+				} else {
+					stopLoading();
+				}
+			}
+		}
+	};
+}

src/main/java/ru/windcorp/progressia/test/LayerTestGUI.java

@@ -26,15 +26,10 @@ import ru.windcorp.progressia.client.graphics.Colors;
 import ru.windcorp.progressia.client.graphics.backend.GraphicsBackend;
 import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
 import ru.windcorp.progressia.client.graphics.font.Font;
-import ru.windcorp.progressia.client.graphics.gui.Button;
-import ru.windcorp.progressia.client.graphics.gui.Checkbox;
 import ru.windcorp.progressia.client.graphics.gui.DynamicLabel;
 import ru.windcorp.progressia.client.graphics.gui.GUILayer;
-import ru.windcorp.progressia.client.graphics.gui.Button;
 import ru.windcorp.progressia.client.graphics.gui.Label;
 import ru.windcorp.progressia.client.graphics.gui.Panel;
-import ru.windcorp.progressia.client.graphics.gui.RadioButton;
-import ru.windcorp.progressia.client.graphics.gui.RadioManager;
 import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
 import ru.windcorp.progressia.client.graphics.gui.layout.LayoutVertical;
 import ru.windcorp.progressia.client.localization.Localizer;
@@ -61,54 +56,6 @@ public class LayerTestGUI extends GUILayer {
 		Font font = new Font().withColor(color).deriveOutlined();
 
 		TestPlayerControls tpc = TestPlayerControls.getInstance();
-		
-		Button disableButton = new Button("TestButton",
-				new Label("TestButtonLabel", new Font().withColor(Colors.BLACK), "I'm in TestGUI"), 
-				b -> {b.setDisable(!b.isDisabled());}
-				);
-		
-		panel.addChild(disableButton);
-		
-		panel.addChild(
-				new Button(
-						"TestButton2",
-						new Label("TestButtonLabel2", new Font().withColor(Colors.BLACK), "I enable the above button"), 
-						b -> {disableButton.setDisable(false);}
-						)
-				);
-		
-		panel.addChild(
-				new Checkbox(
-						"Checkbox1",
-						new Label("CheckboxLabel", font,"Reset"),
-						c -> {c.setText(
-								new Label("CheckboxLabel", font, "Set")
-								);},
-						c -> {c.setText(
-								new Label("CheckboxLabel", font, "Reset")
-								);}
-						)
-				);
-		
-		RadioManager manager = new RadioManager();
-		
-		panel.addChild(
-				new RadioButton(
-						"Radio1,1",
-						new Label("RadioLabel1,1",font,"Option 1"),
-						rb -> {},
-						manager
-						)
-				);
-		
-		panel.addChild(
-				new RadioButton(
-						"Radio1,2",
-						new Label("RadioLabel1,2",font,"Option 2"),
-						rb -> {},
-						manager
-						)
-				);
 
 		panel.addChild(
 			new Label(
@@ -313,127 +260,13 @@ public class LayerTestGUI extends GUILayer {
 		}
 
 	}
-	
-	private static class Counter {
 
-        private int DISPLAY_INERTIA = 200;
-        private long AVERAGE_TIME = 10000;
-        private long first_time;
-
-        private final long[] values;
-        private int size;
-        private int head;
-        
-        private long lastUpdate;
-
-        public Counter(long averageTime, int maxTPS)
-        {
-            DISPLAY_INERTIA = (int) averageTime*maxTPS/1000;
-            AVERAGE_TIME = averageTime;
-            first_time = -1;
-            values = new long[DISPLAY_INERTIA];
-        }
-
-        public void add(long value) {
-        	if (first_time==-1)
-        	{
-        		first_time=System.currentTimeMillis();
-        	}
-            if (size == values.length) {
-                values[head] = value;
-                head++;
-                if (head == values.length)
-                    head = 0;
-            } else {
-                values[size] = value;
-                size++;
-            }
-        }
-
-        public double average() {
-            double count=0;
-            long ctime = System.currentTimeMillis();
-            for (int i=0;i<size;i++)
-            {
-                if ((ctime-values[i])<AVERAGE_TIME)
-                {
-                    count++;
-                }
-            }
-            if ((ctime-first_time)<AVERAGE_TIME)
-            {
-            	if ((ctime-first_time)<10)
-            	{
-            		return 20.0;
-            	}
-                return count/(ctime-first_time)*1000;
-            }
-            return count/AVERAGE_TIME*1000;
-        }
-
-        public double update() {
-        	long now = (long) (GraphicsInterface.getTime() / .05);
-        	if (lastUpdate != now) {
-        		lastUpdate = now;
-        		add(System.currentTimeMillis());
-        	}
-
-            return average();
-        }
-
-    }
-
-	private static class Queue {
-
-		private static final int DISPLAY_INERTIA = 32;
-		private static final double UPDATE_INTERVAL = Units.get(50.0, "ms");
-
-		private final double[] values = new double[DISPLAY_INERTIA];
-		private int size;
-		private int head;
-
-		private long lastUpdate;
-
-		public void add(double value) {
-			if (size == values.length) {
-				values[head] = value;
-				head++;
-				if (head == values.length)
-					head = 0;
-			} else {
-				values[size] = value;
-				size++;
-			}
-		}
-
-		public double average() {
-			if (size == values.length && head!=0) {
-				return (values[head-1]-values[head])/DISPLAY_INERTIA*20;
-			} else if (head==0) {
-				return (values[size-1]-values[0])/DISPLAY_INERTIA*20;
-			} else {
-				return values[head-1]/size*20;
-			}
-		}
-
-		public double update(double value) {
-			long now = (long) (GraphicsInterface.getTime() / UPDATE_INTERVAL);
-			if (lastUpdate != now) {
-				lastUpdate = now;
-				add(value);
-			}
-
-			return average();
-		}
-
-	}
-	
 	private static final Averager FPS_RECORD = new Averager();
-	private static final Queue TPS_RECORD = new Queue();
+	private static final Averager TPS_RECORD = new Averager();
 
 	private static final Supplier<CharSequence> TPS_STRING = DynamicStrings.builder()
 		.addDyn(new MutableStringLocalized("LayerTestGUI.TPSDisplay"))
-		.addDyn(() -> TPS_RECORD.update(ServerState.getInstance().getUptimeTicks()), 5, 1)
+		.addDyn(() -> TPS_RECORD.update(ServerState.getInstance().getTPS()), 5, 1)
 		.buildSupplier();
 
 	private static final Supplier<CharSequence> POS_STRING = DynamicStrings.builder()