Initial commit of SurvivalPlus plugin

src/main/java/de/viper/survivalplus/Manager/BlockManager.java

@@ -0,0 +1,37 @@
+package de.viper.survivalplus.Manager;
+
+import java.util.*;
+
+import org.bukkit.entity.Player;
+
+public class BlockManager {
+
+    private final Map<UUID, Set<UUID>> blockedPlayers = new HashMap<>();
+
+    public void blockPlayer(Player blocker, Player toBlock) {
+        blockedPlayers.computeIfAbsent(blocker.getUniqueId(), k -> new HashSet<>()).add(toBlock.getUniqueId());
+    }
+
+    public void unblockPlayer(Player blocker, Player toUnblock) {
+    Set<UUID> blocked = blockedPlayers.get(blocker.getUniqueId());
+    if (blocked != null) {
+        blocked.remove(toUnblock.getUniqueId());
+        if (blocked.isEmpty()) {
+            blockedPlayers.remove(blocker.getUniqueId());
+        }
+    }
+}
+
+    public boolean hasBlocked(Player blocker, Player potentialBlocked) {
+        return blockedPlayers.getOrDefault(blocker.getUniqueId(), Collections.emptySet())
+                             .contains(potentialBlocked.getUniqueId());
+    }
+
+    public Set<UUID> getBlockedPlayers(Player player) {
+        return blockedPlayers.getOrDefault(player.getUniqueId(), Collections.emptySet());
+    }
+
+    public void clear(Player player) {
+        blockedPlayers.remove(player.getUniqueId());
+    }
+}