Separate command classes into files

src/main/java/pw/kaboom/extras/commands/CommandUsername.java

@@ -0,0 +1,95 @@
+package pw.kaboom.extras;
+
+import java.io.InputStreamReader;
+import java.net.URL;
+
+import javax.net.ssl.HttpsURLConnection;
+
+import org.bukkit.ChatColor;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+
+import org.bukkit.entity.Player;
+
+import org.bukkit.scheduler.BukkitRunnable;
+
+import com.destroystokyo.paper.profile.PlayerProfile;
+import com.destroystokyo.paper.profile.ProfileProperty;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+
+class CommandUsername implements CommandExecutor {
+	private Main main;
+	public CommandUsername(Main main) {
+		this.main = main;
+	}
+
+	private void changeUsernameSkin(final Player player, final String[] name) {
+		new BukkitRunnable() {
+			public void run() {
+				try {
+					String texture = "";
+					String signature = "";
+
+					final String nameColor = ChatColor.translateAlternateColorCodes('&', String.join(" ", name));
+					final String nameShort = nameColor.substring(0, Math.min(16, nameColor.length()));
+
+					final URL nameUrl = new URL("https://api.mojang.com/users/profiles/minecraft/" + nameShort);
+					final HttpsURLConnection nameConnection = (HttpsURLConnection) nameUrl.openConnection();
+
+					if (nameConnection.getResponseCode() == HttpsURLConnection.HTTP_OK) {
+						final InputStreamReader nameStream = new InputStreamReader(nameConnection.getInputStream());
+						final String uuid = new JsonParser().parse(nameStream).getAsJsonObject().get("id").getAsString();
+						nameStream.close();
+						nameConnection.disconnect();
+
+						final URL uuidUrl = new URL("https://sessionserver.mojang.com/session/minecraft/profile/" + uuid + "?unsigned=false");
+						final HttpsURLConnection uuidConnection = (HttpsURLConnection) uuidUrl.openConnection();
+
+						if (uuidConnection.getResponseCode() == HttpsURLConnection.HTTP_OK) {
+							final InputStreamReader uuidStream = new InputStreamReader(uuidConnection.getInputStream());
+							final JsonObject response = new JsonParser().parse(uuidStream).getAsJsonObject().get("properties").getAsJsonArray().get(0).getAsJsonObject();
+							texture = response.get("value").getAsString();
+							signature = response.get("signature").getAsString();
+
+							uuidStream.close();
+							uuidConnection.disconnect();
+						}
+					}
+
+					final PlayerProfile profile = player.getPlayerProfile();
+					profile.clearProperties();
+					profile.setName(nameShort);
+
+					if (!("".equals(texture)) &&
+						!("".equals(signature))) {
+						profile.setProperty(new ProfileProperty("textures", texture, signature));
+					}
+
+					new BukkitRunnable() {
+						public void run() {
+							player.setPlayerProfile(profile);
+							player.sendMessage("Successfully set your username to \"" + nameShort + "\"");
+						}
+					}.runTask(main);
+				} catch (Exception exception) {
+				}
+			}
+		}.runTaskAsynchronously(main);
+	}
+
+	public boolean onCommand(CommandSender sender, Command command, String label, final String[] args) {
+		final Player player = (Player) sender;
+
+		if (args.length == 0) {
+			player.sendMessage(ChatColor.RED + "Usage: /" + label + " <username>");
+		} else {
+			final String[] name = args;
+			changeUsernameSkin(player, name);
+		}
+		return true;
+	}
+}