reorganize engine bits into engine package, same with commands, reimplement player state as FSM

src/main/java/gg/malloc/defense/commands/AddPlayerCommand.java

@@ -0,0 +1,27 @@
+package gg.malloc.defense.commands;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+import gg.malloc.defense.engine.GameRunner;
+
+import gg.malloc.defense.Plugin;
+
+public class AddPlayerCommand implements CommandExecutor {
+  Plugin m_plugin;
+
+  public AddPlayerCommand(Plugin plugin) {
+    m_plugin = plugin;
+  }
+
+  @Override
+  public boolean onCommand(CommandSender sender, Command command, String s, String[] args) {
+    String worldName = args[0];
+    GameRunner runner = m_plugin.getRunnerForWorld(m_plugin.getServer().getWorld(worldName));
+    Player player = m_plugin.getServer().getPlayer(args[1]);
+    runner.addPlayer(player);
+    return true;
+  }
+}

src/main/java/gg/malloc/defense/commands/SetStageCommand.java

@@ -0,0 +1,42 @@
+package gg.malloc.defense.commands;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.World;
+
+import gg.malloc.defense.engine.GameRunner;
+
+import gg.malloc.defense.Plugin;
+
+public class SetStageCommand implements CommandExecutor {
+  Plugin m_plugin;
+
+  public SetStageCommand(Plugin plugin) {
+    m_plugin = plugin;
+  }
+
+  @Override
+  public boolean onCommand(CommandSender sender, Command command, String s, String[] args) {
+    World world = m_plugin.getServer().getWorld(args[1]);
+    GameRunner runner = m_plugin.getRunnerForWorld(world);
+    String stateName = args[0].toLowerCase();
+    boolean ret = false;
+    if (stateName.equals("idle")) {
+      ret = runner.requestTransition(GameRunner.Stage.Idle);
+    } else if (stateName.equals("warmup")) {
+      ret = runner.requestTransition(GameRunner.Stage.Warmup);
+    } else if (stateName.equals("playing")) {
+      ret = runner.requestTransition(GameRunner.Stage.Playing);
+    } else if (stateName.equals("gameover")) {
+      ret = runner.requestTransition(GameRunner.Stage.GameOver);
+    } else {
+      sender.sendMessage("Unknown state " + stateName);
+      return false;
+    }
+    if (!ret) {
+      sender.sendMessage("Could not set state to " + stateName);
+    }
+    return ret;
+  }
+}