players need to be added/removed to the plugin

src/main/java/com/benjocraeft/sharehealth/AbsorptionManager.java

@@ -3,7 +3,6 @@ package com.benjocraeft.sharehealth;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 
-import java.util.ArrayList;
 import java.util.List;
 
 public class AbsorptionManager {
@@ -28,7 +27,7 @@ public class AbsorptionManager {
     }
 
     private void onSecond(){
-        if (Bukkit.getOnlinePlayers().size() == 0)
+        if (Sharehealth.GetPlayers().size() == 0)
             return;
 
         duration -= 20;
@@ -55,7 +54,7 @@ public class AbsorptionManager {
             amount = 0;
         }
         this.amount = amount;
-        List<Player> players = new ArrayList<>(Bukkit.getOnlinePlayers());
+        List<Player> players = Sharehealth.GetPlayers();
         players.remove(player);
         players.forEach(this::setAbsorption);
     }

src/main/java/com/benjocraeft/sharehealth/Commands.java

@@ -1,5 +1,7 @@
 package com.benjocraeft.sharehealth;
 
+import org.bukkit.Bukkit;
+import org.bukkit.OfflinePlayer;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
@@ -7,39 +9,48 @@ import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
 
 import java.util.*;
+import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 
 public class Commands implements TabExecutor {
 
-    final private Map<List<String>, Pair<Consumer<CommandSender>, String>> commands = new HashMap<>();
+    final private Map<List<String>, Pair<BiConsumer<CommandSender, String>, String>> commands = new HashMap<>();
     {
         commands.put(
                 Arrays.asList("get"),
-                Pair.pair(this::commandGetHealth, "Displays current health value.")
+                Pair.pair((sender, arg) -> commandGetHealth(sender), "Displays current health value.")
         );
         commands.put(
                 Arrays.asList("reset"),
-                Pair.pair(this::commandReset, "Gives every player full health and resets 'isFailed' to false. GameMode becomes Survival.")
+                Pair.pair((sender, arg) -> commandReset(sender), "Gives every player full health and resets 'isFailed' to false. GameMode becomes Survival.")
+        );
+        commands.put(
+                Arrays.asList("add"),
+                Pair.pair((sender, name) -> commandActivePlayer(sender, name, true), "Adds a player to the Plugin")
+        );
+        commands.put(
+                Arrays.asList("remove"),
+                Pair.pair((sender, name) -> commandActivePlayer(sender, name, false), "Removes a player from the Plugin")
         );
         commands.put(
                 Arrays.asList("log", "on"),
-                Pair.pair(sender -> this.commandSetLogging(sender, true), "Enables Logging.")
+                Pair.pair((sender, arg) -> commandSetLogging(sender, true), "Enables Logging.")
         );
         commands.put(
                 Arrays.asList("log", "off"),
-                Pair.pair(sender -> this.commandSetLogging(sender, false), "Disables Logging.")
+                Pair.pair((sender, arg) -> commandSetLogging(sender, false), "Disables Logging.")
         );
         commands.put(
                 Arrays.asList("log", "get"),
-                Pair.pair(this::commandGetLogging, "Displays if Logging is enabled.")
+                Pair.pair((sender, arg) -> commandGetLogging(sender), "Displays if Logging is enabled.")
         );
         commands.put(
                 Arrays.asList("stats"),
-                Pair.pair(this::commandSendStats, "Displays statistics about every player.")
+                Pair.pair((sender, arg) -> commandSendStats(sender), "Displays statistics about every player.")
         );
         commands.put(
                 Arrays.asList("help"),
-                Pair.pair(this::commandGetHelp, "Displays help message for command usage.")
+                Pair.pair((sender, arg) -> commandGetHelp(sender), "Displays help message for command usage.")
         );
     }
 
@@ -90,10 +101,13 @@ public class Commands implements TabExecutor {
     public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args){
 
         List<String> argList = Arrays.asList(args);
-        Pair<Consumer<CommandSender>, String> command = commands.get(argList);
+        Pair<BiConsumer<CommandSender, String>, String> command = commands.get(argList);
+        if (args.length > 1 && (args[0].equals("add") || args[0].equals("remove"))){
+            command = commands.get(Arrays.asList(args[0]));
+        }
         if (command == null)
-            command = Pair.pair(this::unknownCommand, "");
+            command = Pair.pair((cmdSender, arg) -> unknownCommand(cmdSender), "");
-        command.first.accept(sender);
+        command.first.accept(sender, args.length > 0 ? args[args.length - 1] : "");
 
         return true;
     }
@@ -106,6 +120,21 @@ public class Commands implements TabExecutor {
         Sharehealth.Instance.reset();
     }
 
+    private void commandActivePlayer(CommandSender sender, String playerName, boolean add){
+        if (!sender.hasPermission("sharehealth.players")){
+            sender.sendMessage("You don't have permissions for this command!");
+            return;
+        }
+        UUID uuid = Bukkit.getOfflinePlayer(playerName).getUniqueId();
+        if (add){
+            Sharehealth.Instance.addPlayer(uuid);
+            sender.sendMessage("Added player " + playerName);
+        } else {
+            Sharehealth.Instance.removePlayer(uuid);
+            sender.sendMessage("Removed player " + playerName);
+        }
+    }
+
     private void commandGetHealth(CommandSender sender){
         String message = "Current health: " + Sharehealth.Instance.getHealthManager().getHealthString();
         sender.sendMessage(message);

src/main/java/com/benjocraeft/sharehealth/FileManager.java

@@ -9,6 +9,7 @@ public class FileManager {
     final private File settingsFile;
     final private File statisticsFile;
     final private File statusFile;
+    final private File playersFile;
 
     final private File pluginFolder = new File(System.getProperty("user.dir"), "plugins/sharehealth");
     final private String pluginPath = pluginFolder.getPath();
@@ -24,7 +25,7 @@ public class FileManager {
         settingsFile = new File(pluginPath + "/settings.txt");
         statisticsFile = new File(pluginPath + "/statistics.txt");
         statusFile = new File(pluginPath + "/status.txt");
-
+        playersFile = new File(pluginPath + "/players.txt");
 
         try {
             if (settingsFile.createNewFile())
@@ -33,6 +34,8 @@ public class FileManager {
                 logger.info(statisticsFile.getName() + " created");
             if (statusFile.createNewFile())
                 logger.info(statusFile.getName() + " created");
+            if (playersFile.createNewFile())
+                logger.info(playersFile.getName() + " created");
         } catch(IOException e){
             e.printStackTrace();
         }
@@ -41,7 +44,7 @@ public class FileManager {
     public Map<UUID, Boolean> loadSettings(){
         Map<UUID, Boolean> settingsMap = new HashMap<>();
 
-        Map<String, String> map = loadFromFile(settingsFile);
+        Map<String, String> map = loadMapFromFile(settingsFile);
         map.forEach((String uuidString, String hasLoggingString) -> {
             UUID uuid = UUID.fromString(uuidString);
             Boolean hasLogging = Boolean.parseBoolean(hasLoggingString);
@@ -50,10 +53,11 @@ public class FileManager {
 
         return settingsMap;
     }
+
     public Map<UUID, Pair<Double, Double>> loadStatistics(){
         Map<UUID, Pair<Double, Double>> statisticsMap = new HashMap<>();
 
-        Map<String, String> map = loadFromFile(statisticsFile);
+        Map<String, String> map = loadMapFromFile(statisticsFile);
         map.forEach((String s1, String s2) -> {
             UUID uuid = UUID.fromString(s1);
 
@@ -67,10 +71,11 @@ public class FileManager {
 
         return statisticsMap;
     }
+
     public Map<String, Object> loadStatus(){
         Map<String, Object> statusMap = new HashMap<>();
 
-        Map<String, String> map = loadFromFile(statusFile);
+        Map<String, String> map = loadMapFromFile(statusFile);
 
         map.forEach((String key, String value) -> {
             if (value.matches("-?\\d+"))
@@ -84,6 +89,13 @@ public class FileManager {
         return statusMap;
     }
 
+    public List<UUID> loadPlayers(){
+        Map<String, String> loaded = loadMapFromFile(playersFile);
+        List<UUID> playerUUIDs = new ArrayList<>();
+        loaded.keySet().forEach(s -> playerUUIDs.add(UUID.fromString(s)));
+        return playerUUIDs;
+    }
+
     public void saveStatistics(Map<UUID, Pair<Double, Double>> statistics){
         saveStatistics(statisticsFile, statistics);
     }
@@ -96,11 +108,11 @@ public class FileManager {
             map.put(uuidString, Statistics.Rounded(pair.first) + "," + Statistics.Rounded(pair.second));
         });
 
-        saveToFile(file, map);
+        saveMapToFile(file, map);
     }
 
     public void saveStatus(Map<String, Object> statusMap){
-        saveToFile(statusFile, statusMap);
+        saveMapToFile(statusFile, statusMap);
     }
 
     public void saveSettings(Map<UUID, Boolean> settingsMap){
@@ -108,7 +120,15 @@ public class FileManager {
 
         settingsMap.forEach((UUID uuid, Boolean hasLogging) -> map.put(uuid.toString(), hasLogging));
 
-        saveToFile(settingsFile, map);
+        saveMapToFile(settingsFile, map);
+    }
+
+    public void savePlayers(List<UUID> playerUUIDs){
+        Map<String, Object> map = new HashMap<>();
+
+        playerUUIDs.forEach(uuid -> map.put(uuid.toString(), ""));
+
+        saveMapToFile(playersFile, map);
     }
 
     public void backupStats(Map<UUID, Pair<Double, Double>> statistics){
@@ -125,7 +145,7 @@ public class FileManager {
         }
     }
 
-    private Map<String, String> loadFromFile(File file) {
+    private Map<String, String> loadMapFromFile(File file) {
         Map<String, String> map = new HashMap<>();
 
         try{
@@ -136,7 +156,7 @@ public class FileManager {
                 String line;
                 while((line = reader.readLine()) != null){
                     String[] split = line.split("=");
-                    map.put(split[0], split[1]);
+                    map.put(split[0], split.length == 2 ? split[1] : "");
                 }
             } catch (NullPointerException ignore){}
 
@@ -149,7 +169,7 @@ public class FileManager {
         return map;
     }
 
-    private void saveToFile(File file, Map<String, Object> content){
+    private void saveMapToFile(File file, Map<String, Object> content){
         try{
             FileWriter stream = new FileWriter(file);
             BufferedWriter out = new BufferedWriter(stream);

src/main/java/com/benjocraeft/sharehealth/FoodRegeneration.java

@@ -11,12 +11,12 @@ public class FoodRegeneration extends BukkitRunnable {
 
     @Override
     public void run(){
-        int allPlayersCount = Sharehealth.GetAlivePlayers().size();
+        int allPlayersCount = Sharehealth.GetPlayers().size();
         if (allPlayersCount == 0)
             return;
 
         int allFoodPoints = 0;
-        for (Player p : Sharehealth.GetAlivePlayers()){
+        for (Player p : Sharehealth.GetPlayers()){
             allFoodPoints += p.getFoodLevel();
         }
 

src/main/java/com/benjocraeft/sharehealth/HealthManager.java

@@ -1,6 +1,5 @@
 package com.benjocraeft.sharehealth;
 
-import org.bukkit.Bukkit;
 import org.bukkit.GameMode;
 import org.bukkit.entity.Player;
 
@@ -51,7 +50,7 @@ public class HealthManager {
 
     void reset(){
         health = 20;
-        Bukkit.getOnlinePlayers().forEach(p -> p.setHealth(health));
+        Sharehealth.GetPlayers().forEach(p -> p.setHealth(health));
     }
 
     boolean onPlayerGotDamage(Player player, double damage, double absorptionDamage){
@@ -68,7 +67,7 @@ public class HealthManager {
     }
 
     void setHealthByPlayer(Player player){
-        for (Player p : Sharehealth.GetAlivePlayers()){
+        for (Player p : Sharehealth.GetPlayers()){
             if (p.equals(player))
                 continue;
             p.setHealth(health);

src/main/java/com/benjocraeft/sharehealth/Messenger.java

@@ -12,10 +12,10 @@ import org.bukkit.event.entity.EntityDamageEvent.DamageCause;
 import org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason;
 import org.bukkit.projectiles.ProjectileSource;
 
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import java.util.UUID;
+import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.logging.Logger;
 
@@ -28,7 +28,7 @@ public class Messenger {
     }
 
     private List<Player> playersToSendLogs(){
-        List<Player> players = new ArrayList<>(Bukkit.getOnlinePlayers());
+        List<Player> players = Sharehealth.GetPlayers();
         players.removeIf(p -> !Sharehealth.Instance.getLogging(p));
         return players;
     }
@@ -43,7 +43,7 @@ public class Messenger {
     void sendFailedMessage(Player cause){
         String playerName = getPlayerName(cause);
         String message = "Mission failed, go next! CAUSE: " + ChatColor.RED + playerName;
-        Bukkit.getOnlinePlayers().forEach(p -> p.sendMessage(message));
+        Sharehealth.GetPlayers().forEach(p -> p.sendMessage(message));
     }
 
     void onPlayerGotDamageMessage(Player player, double damage, DamageCause cause){
@@ -131,7 +131,7 @@ public class Messenger {
         return stats.toString();
     }
 
-    String helpMessage(Map<List<String>, Pair<Consumer<CommandSender>, String>> commands){
+    String helpMessage(Map<List<String>, Pair<BiConsumer<CommandSender, String>, String>> commands){
         StringBuilder helpMessage = new StringBuilder("Usage:");
         commands.forEach((nameList, pair) -> {
             StringBuilder name = new StringBuilder();

src/main/java/com/benjocraeft/sharehealth/Sharehealth.java

@@ -17,6 +17,7 @@ public class Sharehealth extends JavaPlugin {
     static Sharehealth Instance;
 
     private FileManager fileManager;
+
     public FileManager getFileManager(){
         return fileManager;
     }
@@ -66,9 +67,12 @@ public class Sharehealth extends JavaPlugin {
         statistics = new Statistics(fileManager.loadStatistics(), fileManager.loadSettings());
         getLogger().info("Statistics and Settings loaded");
 
+        //Load status (current health, absorption, etc)
         loadStatus();
         getLogger().info("Status loaded");
 
+        //Load players
+        ActiveUUIDs = fileManager.loadPlayers();
 
         //Starts custom health regeneration
         new FoodRegeneration();
@@ -171,7 +175,7 @@ public class Sharehealth extends JavaPlugin {
             return;
         isFailed = true;
         messenger.sendFailedMessage(cause);
-        Bukkit.getOnlinePlayers().forEach(p -> p.setGameMode(GameMode.SPECTATOR));
+        GetPlayers().forEach(p -> p.setGameMode(GameMode.SPECTATOR));
 
         saveStatus();
     }
@@ -182,7 +186,7 @@ public class Sharehealth extends JavaPlugin {
         statistics.reset();
         fileManager.saveStatistics(statistics.getStatistics());
         healthManager.reset();
-        Bukkit.getOnlinePlayers().forEach(p -> p.setGameMode(GameMode.SURVIVAL));
+        Sharehealth.GetPlayers().forEach(p -> p.setGameMode(GameMode.SURVIVAL));
 
         saveStatus();
     }
@@ -195,10 +199,21 @@ public class Sharehealth extends JavaPlugin {
         }
     }
 
-    static List<Player> GetAlivePlayers(){
+    private static List<UUID> ActiveUUIDs = new ArrayList<>();
-        List<Player> list = new ArrayList<>(Bukkit.getOnlinePlayers());
+    static List<Player> GetPlayers(){
-        list.removeIf(Entity::isDead);
+        List<Player> players = new ArrayList<>(Bukkit.getOnlinePlayers());
-        return list;
+        players.removeIf(p -> !ActiveUUIDs.contains(p.getUniqueId()));
+        return players;
+    }
+
+    public void addPlayer(UUID uuid){
+        ActiveUUIDs.add(uuid);
+        fileManager.savePlayers(ActiveUUIDs);
+    }
+
+    public void removePlayer(UUID uuid){
+        ActiveUUIDs.remove(uuid);
+        fileManager.savePlayers(ActiveUUIDs);
     }
 
     void saveStatus(){

src/main/java/com/benjocraeft/sharehealth/Statistics.java

@@ -1,6 +1,5 @@
 package com.benjocraeft.sharehealth;
 
-import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 
 import java.util.HashMap;
@@ -59,7 +58,7 @@ public class Statistics {
 
     void reset(){
         statistics.clear();
-        Bukkit.getOnlinePlayers().forEach(this::putIfAbsent);
+        Sharehealth.GetPlayers().forEach(this::putIfAbsent);
     }
 
 }