[+] Create task manager

src/main/java/org/hydev/hyritone/task/Task.java

@@ -0,0 +1,27 @@
+package org.hydev.hyritone.task;
+
+/**
+ * A task waiting to be executed.
+ * <p>
+ * Class created by the HyDEV Team on 2020-01-24!
+ *
+ * @author HyDEV Team (https://github.com/HyDevelop)
+ * @author Hykilpikonna (https://github.com/hykilpikonna)
+ * @author Vanilla (https://github.com/VergeDX)
+ * @since 2020-01-24 18:06
+ */
+public interface Task
+{
+    /**
+     * Execute the task
+     */
+    void execute(TaskRunState state);
+
+    /**
+     * Stop the task
+     */
+    default void stop()
+    {
+        // Default nothing to do
+    }
+}

src/main/java/org/hydev/hyritone/task/TaskList.java

@@ -0,0 +1,28 @@
+package org.hydev.hyritone.task;
+
+import lombok.AllArgsConstructor;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+/**
+ * Instances of this class contains lists of tasks to be executed in order.
+ * <p>
+ * Class created by the HyDEV Team on 2020-01-24!
+ *
+ * @author HyDEV Team (https://github.com/HyDevelop)
+ * @author Hykilpikonna (https://github.com/hykilpikonna)
+ * @author Vanilla (https://github.com/VergeDX)
+ * @since 2020-01-24 18:05
+ */
+@AllArgsConstructor
+public class TaskList extends ArrayList<Task>
+{
+    public final String name;
+
+    public TaskList(String name, Task... tasks)
+    {
+        this(name);
+        Collections.addAll(this, tasks);
+    }
+}

src/main/java/org/hydev/hyritone/task/TaskManager.java

@@ -0,0 +1,76 @@
+package org.hydev.hyritone.task;
+
+import lombok.Getter;
+
+/**
+ * This class is used to manage tasks.
+ * <p>
+ * Class created by the HyDEV Team on 2020-01-24!
+ *
+ * @author HyDEV Team (https://github.com/HyDevelop)
+ * @author Hykilpikonna (https://github.com/hykilpikonna)
+ * @author Vanilla (https://github.com/VergeDX)
+ * @since 2020-01-24 19:03
+ */
+@Getter
+public class TaskManager
+{
+    private TaskRunState runState = null;
+
+    /**
+     * Run a task list
+     *
+     * @param list Task list
+     * @return Successfully started or not
+     */
+    public boolean run(TaskList list)
+    {
+        // Check already started
+        if (runState != null) return false;
+
+        // Reset values
+        runState = new TaskRunState(null, list, 0);
+
+        // Create thread
+        runState.thread = new Thread(() ->
+        {
+            // Execute step by step
+            while (runState.step < list.size())
+            {
+                list.get(runState.step).execute(runState);
+                runState.step++;
+            }
+
+            // Finished
+            stop();
+        }, "Hyritone Task");
+
+        // Start async
+        runState.thread.start();
+
+        // Success
+        return true;
+    }
+
+    /**
+     * Stop the task list
+     */
+    public void stop()
+    {
+        // Not started
+        if (runState == null) return;
+
+        // Stop thread
+        runState.thread.interrupt();
+
+        // Stop task
+        if (runState.getStep() < runState.getTaskList().size())
+        {
+            runState.getTaskList().get(runState.getStep()).stop();
+        }
+
+        runState = null;
+    }
+
+    // TODO: pause
+}

src/main/java/org/hydev/hyritone/task/TaskPresets.java

@@ -0,0 +1,98 @@
+package org.hydev.hyritone.task;
+
+import lombok.SneakyThrows;
+import org.apache.commons.io.FileUtils;
+import org.hydev.hyritone.Main;
+
+import javax.script.ScriptException;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.FileVisitOption;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.hydev.hyritone.utils.ScriptUtils.getEngine;
+
+/**
+ * This class contains preset tasks
+ * TODO: Make a UI for task list!
+ * <p>
+ * Class created by the HyDEV Team on 2020-01-24!
+ *
+ * @author HyDEV Team (https://github.com/HyDevelop)
+ * @author Hykilpikonna (https://github.com/hykilpikonna)
+ * @author Vanilla (https://github.com/VergeDX)
+ * @since 2020-01-24 18:23
+ */
+public class TaskPresets
+{
+    // Map<name.toLowerCase(), taskList>
+    public static Map<String, TaskList> presets = new HashMap<>();
+
+    /**
+     * Register a task list
+     *
+     * @param list Task list
+     */
+    public static void register(TaskList list)
+    {
+        presets.put(list.name.toLowerCase(), list);
+    }
+
+    /**
+     * Get preset by name
+     *
+     * @param name Lowercase name
+     * @return Task list by name, null if not found
+     */
+    public static TaskList getPreset(String name)
+    {
+        if (presets.containsKey(name.toLowerCase()))
+        {
+            return presets.get(name.toLowerCase());
+        }
+        return null;
+    }
+
+    /**
+     * Load presets from file
+     */
+    @SneakyThrows
+    public static void reloadPresets()
+    {
+        Path scriptDirPath = Main.taskPresetsDir.toPath();
+
+        presets.clear();
+
+        try
+        {
+            Files.walk(scriptDirPath, FileVisitOption.FOLLOW_LINKS)
+                .filter(Files::isRegularFile)
+                .forEach(path ->
+                {
+                    try
+                    {
+                        String script = FileUtils.readFileToString(path.toFile(), StandardCharsets.UTF_8);
+                        TaskList list = (TaskList) getEngine().eval(script);
+                        presets.put(list.name.toLowerCase(), list);
+                    }
+                    catch (IOException e)
+                    {
+                        throw new UncheckedIOException(e);
+                    }
+                    catch (ScriptException e)
+                    {
+                        e.printStackTrace();
+                    }
+                });
+        }
+        catch (IOException | UncheckedIOException e)
+        {
+            System.err.println("Error when loading hyritone scripts.");
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/org/hydev/hyritone/task/TaskRunState.java

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+package org.hydev.hyritone.task;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+/**
+ * TODO: Write a description for this class!
+ * <p>
+ * Class created by the HyDEV Team on 2020-01-24!
+ *
+ * @author HyDEV Team (https://github.com/HyDevelop)
+ * @author Hykilpikonna (https://github.com/hykilpikonna)
+ * @author Vanilla (https://github.com/VergeDX)
+ * @since 2020-01-24 20:38
+ */
+@Data
+@AllArgsConstructor
+public class TaskRunState
+{
+    public Thread thread;
+    public TaskList taskList;
+    public int step;
+
+    @Override
+    public String toString()
+    {
+        return "Task " + thread.getId() + " is executing step " + step + " of " + taskList.size() + " " +
+            "| Current Task: " + taskList.get(step).getClass().getSimpleName();
+    }
+}