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/**
 * Copyright (c) 2012-2016, www.tinygroup.org ([email protected]).
 *
 *  Licensed under the GPL, Version 3.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.gnu.org/licenses/gpl.html
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.tinygroup.menucommand.handler;

import org.tinygroup.commons.tools.StringUtil;
import org.tinygroup.context.Context;
import org.tinygroup.menucommand.CommandHandler;
import org.tinygroup.menucommand.MenuCommandConstants;
import org.tinygroup.menucommand.config.MenuCommand;
import org.tinygroup.menucommand.config.MenuConfig;
import org.tinygroup.menucommand.config.SystemCommand;

/**
 * 抽象的系统命令的钩子
 *
 * @author yancheng11334
 */
public abstract class SystemCommandHandler implements CommandHandler {

    public void beforeExecute(Context context) {
        MenuConfig config = context.get(MenuCommandConstants.MENU_CONFIG_PAGE_NAME);
        SystemCommand systemCommand = context.get(MenuCommandConstants.SYSTEM_COMMAND_NAME);
        String command = context.get(MenuCommandConstants.USER_INPUT_COMMAND_NAME);
        execute(command, systemCommand, config, context);
    }

    public void afterExecute(Context context) {
        context.remove(MenuCommandConstants.MENU_CONFIG_PAGE_NAME);
        context.remove(MenuCommandConstants.GOTO_MENU_ID_NAME);
        context.remove(MenuCommandConstants.RENDER_PAGE_PATH_NAME);
        context.remove(MenuCommandConstants.SYSTEM_COMMAND_NAME);
        context.remove(MenuCommandConstants.USER_INPUT_COMMAND_NAME);
    }

    protected String getRenderPath(SystemCommand systemCommand, Context context) {
        return StringUtil.isEmpty(systemCommand.getPath()) ? MenuCommandConstants.getRenderPath(context) : systemCommand.getPath();
    }

    /**
     * 执行退出操作
     *
     * @param config
     * @param context
     */
    protected void dealExitEvent(String command, MenuConfig config, Context context) {
        MenuCommand menuCommand = config.matchEvent(MenuCommandConstants.EXIT_EVENT_TYPE);
        if (menuCommand != null) {
            MenuCommandHandler handler = menuCommand.createCommandObject();
            if (handler != null) {
                //执行操作
                handler.execute(command, menuCommand, context);
            }

        }

    }

    /**
     * 执行相关菜单逻辑，保存渲染路径和跳转菜单id
     *
     * @param command
     * @param systemCommand
     * @param config
     * @param context
     */
    protected abstract void execute(String command, SystemCommand systemCommand, MenuConfig config, Context context);

}