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/*
 * Beangle, Agile Development Scaffold and Toolkit
 *
 * Copyright (c) 2005-2014, Beangle Software.
 *
 * Beangle is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Beangle is distributed in the hope that it will be useful.
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Beangle.  If not, see .
 */
package org.beangle.struts2.view.component;

import java.util.Collection;
import java.util.List;

import org.beangle.commons.collection.CollectUtils;
import org.beangle.struts2.convention.ActionMessages;
import org.beangle.struts2.convention.Flash;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.util.ValueStack;

public class Messages extends UIBean {

  List actionMessages = null;
  List actionErrors = null;

  private String clear = "true";

  public Messages(ValueStack stack) {
    super(stack);
  }

  protected Flash getFlash() {
    Flash flash = (Flash) ActionContext.getContext().getSession().get("flash");
    if (null == flash) {
      flash = new Flash();
      ActionContext.getContext().getSession().put("flash", flash);
    }
    return flash;
  }

  @Override
  protected void evaluateParams() {
    ActionMessages messages = (ActionMessages) getFlash().get(Flash.MESSAGES);
    if (null != messages && (!messages.getMessages().isEmpty() || !messages.getErrors().isEmpty())) {
      generateIdIfEmpty();
      actionMessages = CollectUtils.newArrayList(messages.getMessages());
      actionErrors = CollectUtils.newArrayList(messages.getErrors());
      if ("true".equals(clear)) {
        messages.clear();
      }
    }
  }

  public boolean hasActionErrors() {
    return !actionErrors.isEmpty();
  }

  public boolean hasActionMessages() {
    return !actionMessages.isEmpty();
  }

  public void setClear(String clear) {
    this.clear = clear;
  }

  public Collection getActionMessages() {
    return actionMessages;
  }

  public Collection getActionErrors() {
    return actionErrors;
  }

}