3.7-beta

- refactoring
- different requirements based on prestige

src/main/java/sh/okx/rankup/hook/PermissionManager.java

@@ -0,0 +1,30 @@
+package sh.okx.rankup.hook;
+
+import net.milkbowl.vault.permission.Permission;
+import org.bukkit.plugin.RegisteredServiceProvider;
+import sh.okx.rankup.RankupPlugin;
+
+public class PermissionManager {
+  private final RankupPlugin plugin;
+
+  public PermissionManager(RankupPlugin plugin) {
+    this.plugin = plugin;
+  }
+
+  public PermissionProvider findPermissionProvider() {
+    return getVaultPermissionProvider();
+  }
+
+  private PermissionProvider getVaultPermissionProvider() {
+    RegisteredServiceProvider<Permission> rsp = plugin.getServer().getServicesManager()
+        .getRegistration(Permission.class);
+    if (rsp == null) {
+      return null;
+    }
+    Permission provider = rsp.getProvider();
+    if (!provider.hasGroupSupport()) {
+      return null;
+    }
+    return new VaultPermissionProvider(provider);
+  }
+}