src/de/steamwar/misslewars/MWTeam.java

@@ -19,6 +19,7 @@
 
 package de.steamwar.misslewars;
 
+import de.steamwar.misslewars.items.Missile;
 import org.bukkit.ChatColor;
 import org.bukkit.GameMode;
 import org.bukkit.Location;
@@ -133,6 +134,17 @@ public class MWTeam {
 			MissileWars.end(WinReasons.NO_ENEMY, enemy());
 	}
 
+	public void invitePlayer(Player p) {
+		if (enemy().openInvitations.contains(p)) return;
+
+		openInvitations.add(p);
+	}
+
+	public void acceptInvite(Player p) {
+		removeInvitations(p);
+		join(p);
+	}
+	
 	private MWTeam enemy() {
 		if (this == MissileWars.getRedTeam())
 			return MissileWars.getBlueTeam();
@@ -148,8 +160,17 @@ public class MWTeam {
 		return players.contains(p);
 	}
 
+	public boolean hasInvite(Player p) {
+		return openInvitations.contains(p);
+	}
+
 	public String getColoredName() {
 		return color.toString() + teamName;
 	}
 
+	public static void removeInvitations(Player p) {
+		MissileWars.getRedTeam().openInvitations.remove(p);
+		MissileWars.getBlueTeam().openInvitations.remove(p);
+	}
+
 }

src/de/steamwar/misslewars/MissileWars.java

@@ -19,6 +19,9 @@
 
 package de.steamwar.misslewars;
 
+import de.steamwar.misslewars.commands.CommandAccept;
+import de.steamwar.misslewars.commands.CommandDecline;
+import de.steamwar.misslewars.commands.CommandInvite;
 import de.steamwar.misslewars.commands.CommandSpectate;
 import de.steamwar.misslewars.countdowns.EndCountdown;
 import de.steamwar.misslewars.countdowns.ItemCountdown;
@@ -29,6 +32,7 @@ import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.GameMode;
 import org.bukkit.Sound;
+import org.bukkit.command.CommandExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
 
@@ -62,7 +66,14 @@ public class MissileWars extends JavaPlugin {
 		new FightListener();
 		new ChatListener();
 		getCommand("spectate").setExecutor(new CommandSpectate());
-		getCommand("invite").setExecutor(new CommandSpectate());
+
+		// Invitation Commands
+		CommandInvite commandInvite = new CommandInvite();
+		getCommand("invite").setExecutor(commandInvite);
+		getCommand("invite").setTabCompleter(commandInvite);
+
+		getCommand("accept").setExecutor(new CommandAccept());
+		getCommand("decline").setExecutor(new CommandDecline());
 
 		new WaitingCountdown();
 		new ItemCountdown();
@@ -137,6 +148,14 @@ public class MissileWars extends JavaPlugin {
 		return null;
 	}
 
+	public static MWTeam getInvitation(Player p) {
+		if(blueTeam.hasInvite(p))
+			return blueTeam;
+		if(redTeam.hasInvite(p))
+			return redTeam;
+		return null;
+	}
+
 	public static void join(Player p) {
 		if (MissileWars.getRedTeam().size() < MissileWars.getBlueTeam().size()) {
 			MissileWars.getRedTeam().join(p);

src/de/steamwar/misslewars/commands/CommandAccept.java

@@ -0,0 +1,53 @@
+/*
+ *
+ *     This file is a part of the SteamWar software.
+ *
+ *     Copyright (C) 2020  SteamWar.de-Serverteam
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Affero General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * /
+ */
+
+package de.steamwar.misslewars.commands;
+
+import de.steamwar.misslewars.Config;
+import de.steamwar.misslewars.MWTeam;
+import de.steamwar.misslewars.MissileWars;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+public class CommandAccept implements CommandExecutor {
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if (!(sender instanceof Player)) return false;
+        Player player = (Player) sender;
+        if (!Config.isChallenge()) {
+            player.sendMessage("§cDieser Command ist deaktiviert.");
+            return false;
+        }
+
+        MWTeam teamInvitation = MissileWars.getInvitation(player);
+        if (teamInvitation == null) {
+            player.sendMessage("§cDu wurdest nicht eingeladen.");
+            return false;
+        }
+
+        teamInvitation.acceptInvite(player);
+        return false;
+    }
+
+}

src/de/steamwar/misslewars/commands/CommandDecline.java

@@ -0,0 +1,54 @@
+/*
+ *
+ *     This file is a part of the SteamWar software.
+ *
+ *     Copyright (C) 2020  SteamWar.de-Serverteam
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ *     You should have received a copy of the GNU Affero General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * /
+ */
+
+package de.steamwar.misslewars.commands;
+
+import de.steamwar.misslewars.Config;
+import de.steamwar.misslewars.MWTeam;
+import de.steamwar.misslewars.MissileWars;
+import de.steamwar.misslewars.items.Missile;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+public class CommandDecline implements CommandExecutor {
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if (!(sender instanceof Player)) return false;
+        Player player = (Player) sender;
+        if (!Config.isChallenge()) {
+            player.sendMessage("§cDieser Command ist deaktiviert.");
+            return false;
+        }
+
+        MWTeam teamInvitation = MissileWars.getInvitation(player);
+        if (teamInvitation == null) {
+            player.sendMessage("§cDu wurdest nicht eingeladen.");
+            return false;
+        }
+
+        MWTeam.removeInvitations(player);
+        return false;
+    }
+
+}

src/de/steamwar/misslewars/commands/CommandInvite.java

@@ -22,12 +22,19 @@
 package de.steamwar.misslewars.commands;
 
 import de.steamwar.misslewars.Config;
+import de.steamwar.misslewars.MissileWars;
+import org.bukkit.Bukkit;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
 import org.bukkit.entity.Player;
 
-public class CommandInvite implements CommandExecutor {
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class CommandInvite implements CommandExecutor, TabCompleter {
 
     @Override
     public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
@@ -37,7 +44,48 @@ public class CommandInvite implements CommandExecutor {
             player.sendMessage("§cDieser Command ist deaktiviert.");
             return false;
         }
+
+        if (!Config.RedLeader.equals(player.getUniqueId()) && !Config.BlueLeader.equals(player.getUniqueId())) {
+            player.sendMessage("§cDu kannst keine Spieler einladen.");
+            return false;
+        }
+        if (MissileWars.getTeam(player) == null) {
+            player.sendMessage("§cDu kannst keine Spieler einladen.");
             return false;
         }
 
+        if (args.length != 1) {
+            player.sendMessage("§c/invite <PLAYER>");
+            return false;
+        }
+
+        Player invitedPlayer = Bukkit.getPlayer(args[0]);
+        if (MissileWars.getTeam(invitedPlayer) != null) {
+            player.sendMessage("§cDieser Spieler ist bereits in einem Team.");
+            return false;
+        }
+        if (MissileWars.getInvitation(invitedPlayer) != null) {
+            player.sendMessage("§cDieser Spieler wurde bereits eingeladen.");
+            return false;
+        }
+
+        MissileWars.getTeam(player).invitePlayer(invitedPlayer);
+        invitedPlayer.sendMessage("§7Du wurdest von §6" + player.getName() + "§7 in das Team §6" + MissileWars.getTeam(player).getColoredName() + "§7 eingeladen.");
+        invitedPlayer.sendMessage("§8/§6accept §8- §7Zum akzeptieren.");
+        invitedPlayer.sendMessage("§8/§6decline §8- §7Zum ablehnen.");
+        return false;
+    }
+
+    @Override
+    public List<String> onTabComplete(CommandSender sender, Command command, String label, String[] args) {
+        if (args.length != 1) return new ArrayList<>();
+        return Bukkit.getOnlinePlayers()
+                .stream()
+                .filter(p -> MissileWars.getTeam(p) != null)
+                .filter(p -> MissileWars.getInvitation(p) != null)
+                .map(Player::getName)
+                .filter(s -> s.startsWith(args[0]))
+                .collect(Collectors.toList());
+    }
+
 }

src/de/steamwar/misslewars/listener/ConnectionListener.java

@@ -20,6 +20,7 @@
 package de.steamwar.misslewars.listener;
 
 import de.steamwar.misslewars.FightState;
+import de.steamwar.misslewars.MWTeam;
 import de.steamwar.misslewars.MissileWars;
 import org.bukkit.GameMode;
 import org.bukkit.event.EventHandler;
@@ -42,6 +43,7 @@ public class ConnectionListener extends BasicListener{
 
 	@EventHandler
 	public void onLeave(PlayerQuitEvent e) {
+		MWTeam.removeInvitations(e.getPlayer());
 		MissileWars.leave(e.getPlayer());
 	}
 

src/plugin.yml

@@ -13,3 +13,5 @@ depend:
 commands:
  spectate:
  invite:
+ accept:
+ decline: