package com.foxinmy.weixin4j.tuple;
   
   import java.util.Arrays;
   import java.util.LinkedList;
   import java.util.List;
   
   import javax.xml.bind.annotation.XmlElement;
   import javax.xml.bind.annotation.XmlTransient;
   
  import com.alibaba.fastjson.annotation.JSONField;
  
  /**
   * 图文对象(mpnews消息与news消息类似，不同的是图文消息内容存储在微信后台，并且支持保密选项。每个应用每天最多可以发送100次)
   * <p>
   * <font color="red">可用于「公众平台的群发消息」「客服消息」</font>
   * </p>
   * <li>当用于发送公众平台的群发消息和客服消息时：其中mediaId与articles请至少保持一个有值 <li>
   * 当用于发送企业号的客服消息时：其中articles必须有值
   *
   * @className MpNews
   * @author jinyu(foxinmy@gmail.com)
   * @date 2014年9月29日
   * @since JDK 1.6
   * @see
   */
  public class MpNews implements MassTuple, NotifyTuple {
  
  	private static final long serialVersionUID = 8853054484809101524L;
  
  	/**
  	 * 允许最多的图文列表数
  	 */
  	private static final int MAX_ARTICLE_COUNT = 8;
  
  	@Override
  	public String getMessageType() {
  		return "mpnews";
  	}
  
  	/**
  	 * 上传图文列表后微信返回的媒体ID
  	 */
  	@JSONField(name = "media_id")
  	@XmlElement(name = "MediaId")
  	private String mediaId;
  	/**
  	 * 图文列表
  	 */
  	@XmlTransient
  	private LinkedList<MpArticle> articles;
  
  	/**
  	 * 群发消息、客服消息 预先上传List#MpArticle得到mediaId
  	 *
  	 * @param mediaId
  	 *            群发素材的媒体ID
  	 */
  	public MpNews(String mediaId) {
  		this.mediaId = mediaId;
  		this.articles = new LinkedList<MpArticle>();
  	}
  
  	/**
  	 * 群发消息 自动上传List#MpArticle得到mediaId
  	 *
  	 * @param articles
  	 *            文章列表
  	 */
  	public MpNews(MpArticle... articles) {
  		this.articles = new LinkedList<MpArticle>(Arrays.asList(articles));
  	}
  
  	/**
  	 * @param thumbMediaId
  	 *            缩略图
  	 * @param title
  	 *            标题
  	 * @param content
  	 *            内容
  	 */
  	public MpNews addArticle(String thumbMediaId, String title, String content) {
  		return addArticle(new MpArticle(thumbMediaId, title, content));
  	}
  
  	public MpNews addArticle(MpArticle... articles) {
  		for (MpArticle article : articles) {
  			this.articles.add(article);
  		}
  		return this;
  	}
  
  	public MpNews addFirstArticle(MpArticle article) {
  		articles.addFirst(article);
  		return this;
  	}
  
  	public MpNews addLastArticle(MpArticle article) {
  		articles.addLast(article);
  		return this;
 	}
 
 	public MpNews removeFirstArticle() {
 		articles.removeFirst();
 		return this;
 	}
 
 	public MpNews removeLastArticle() {
 		articles.removeLast();
 		return this;
 	}
 
 	@JSONField(serialize = false)
 	@XmlTransient
 	public boolean isMaxCount() {
 		return articles.size() == MAX_ARTICLE_COUNT;
 	}
 
 	public List<MpArticle> getArticles() {
 		if (articles.size() > MAX_ARTICLE_COUNT) {
 			return articles.subList(0, MAX_ARTICLE_COUNT);
 		} else {
 			return articles;
 		}
 	}
 
 	@JSONField(serialize = false)
 	@XmlTransient
 	public List<MpArticle> getFullArticles() {
 		return articles;
 	}
 
 	public String getMediaId() {
 		return mediaId;
 	}
 
 	@Override
 	public String toString() {
 		return "MpNews [articles=" + articles + ", mediaId=" + mediaId + "]";
 	}
 }