package foundation.menu;

import foundation.dao.preload.Node;
import foundation.data.entity.Entity;
import foundation.json.IJSONProvider;
import foundation.json.IJSONWriter;

public class Menu extends Node implements IJSONProvider {
	
	private String id;
	private String parentId;
	private int orderNo;
	private Entity entity;

	public Menu() {

	}

	public void load(Entity entity) {
		this.entity = entity;
		id = entity.getString("id");
		parentId = entity.getString("parent_id");
		orderNo = entity.getInteger("order_no", 0);
	}

	public void copyFrom(Menu menu) {
		this.id = menu.id;
		this.parentId = menu.parentId;
		this.orderNo = menu.orderNo;
		this.entity = menu.entity;
	}

	public void addOneChild(Menu child) {
		child.parent = this;
		children.add(child.getId(), child);
	}

	public Entity getEntity() {
		return entity;
	}

	public String getId() {
		return id;
	}

	public String getParentId() {
		return parentId;
	}
	
	public int getOrderNo() {
		return orderNo;
	}

	@Override
	public void writeJSON(IJSONWriter writer) {
		writer.beginObject();
		writeJSONBody(writer);
		writer.endObject();			
	}
	
	public void writeJSONBody(IJSONWriter writer) {
		entity.writeJSONBody(writer);
		
		if (!children.isEmpty()) {
			writer.beginArray("children");
			
			for (Node child: children) {
				child.writeJSON(writer);
			}
			
			writer.endArray();
		}		
	}

}