Group Manager/Developers

There are various ways to hook into GM, although unless you are intending to do something complicated, it is best to just use SuperPerms. SuperPerms support is native to bukkit, and thus you will not need to hook any plugins, or write specific hacks for each plugin.

Source

You can find the source code of GM here: https://github.com/essentials/Essentials/tree/groupmanager/EssentialsGroupManager/src/org/anjocaido/groupmanager

Example GM Hook

import java.util.Arrays;
import java.util.List;
import org.anjocaido.groupmanager.GroupManager;
import org.anjocaido.groupmanager.dataholder.OverloadedWorldHolder;
import org.anjocaido.groupmanager.permissions.AnjoPermissionsHandler;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.server.PluginDisableEvent;
import org.bukkit.event.server.PluginEnableEvent;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.PluginManager;

public class GMHook
{
	private GroupManager groupManager;
	private Plugin plugin;

	public GMHook(final Plugin plugin)
	{
		this.plugin = plugin;
	}

	@EventHandler(priority = EventPriority.MONITOR)
	public void onPluginEnable(final PluginEnableEvent event)
	{
		final PluginManager pluginManager = plugin.getServer().getPluginManager();
		final Plugin GMplugin = pluginManager.getPlugin("GroupManager");

		if (GMplugin != null && GMplugin.isEnabled())
		{
			groupManager = (GroupManager)GMplugin;

		}
	}

	@EventHandler(priority = EventPriority.MONITOR)
	public void onPluginDisable(PluginDisableEvent event)
	{
		if (groupManager != null)
		{
			if (event.getPlugin().getDescription().getName().equals("GroupManager"))
			{
				groupManager = null;
			}
		}
	}

	public String getGroup(final Player base)
	{
		final AnjoPermissionsHandler handler = groupManager.getWorldsHolder().getWorldPermissions(base);
		if (handler == null)
		{
			return null;
		}
		return handler.getGroup(base.getName());
	}

	public boolean setGroup(final Player base, final String group)
	{
		final OverloadedWorldHolder handler = groupManager.getWorldsHolder().getWorldData(base);
		if (handler == null)
		{
			return false;
		}
		handler.getUser(base.getName()).setGroup(handler.getGroup(group));
		return true;
	}

	public List<String> getGroups(final Player base)
	{
		final AnjoPermissionsHandler handler = groupManager.getWorldsHolder().getWorldPermissions(base);
		if (handler == null)
		{
			return null;
		}
		return Arrays.asList(handler.getGroups(base.getName()));
	}

	public String getPrefix(final Player base)
	{
		final AnjoPermissionsHandler handler = groupManager.getWorldsHolder().getWorldPermissions(base);
		if (handler == null)
		{
			return null;
		}
		return handler.getUserPrefix(base.getName());
	}

	public String getSuffix(final Player base)
	{
		final AnjoPermissionsHandler handler = groupManager.getWorldsHolder().getWorldPermissions(base);
		if (handler == null)
		{
			return null;
		}
		return handler.getUserSuffix(base.getName());
	}

	public boolean hasPermission(final Player base, final String node)
	{
		final AnjoPermissionsHandler handler = groupManager.getWorldsHolder().getWorldPermissions(base);
		if (handler == null)
		{
			return false;
		}
		return handler.has(base, node);
	}
}