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package me.chanjar.weixin.mp.util.json;

import com.google.gson.*;
import me.chanjar.weixin.common.util.json.GsonHelper;
import me.chanjar.weixin.mp.bean.material.WxMpMaterialNews;
import me.chanjar.weixin.mp.bean.material.WxMpNewsArticle;

import java.lang.reflect.Type;
import java.text.SimpleDateFormat;
import java.util.Date;

public class WxMpMaterialNewsGsonAdapter implements JsonSerializer, JsonDeserializer {

  @Override
  public JsonElement serialize(WxMpMaterialNews wxMpMaterialNews, Type typeOfSrc, JsonSerializationContext context) {
    JsonObject newsJson = new JsonObject();

    JsonArray articleJsonArray = new JsonArray();
    for (WxMpNewsArticle article : wxMpMaterialNews.getArticles()) {
      JsonObject articleJson = WxMpGsonBuilder.create().toJsonTree(article, WxMpNewsArticle.class).getAsJsonObject();
      articleJsonArray.add(articleJson);
    }
    newsJson.add("articles", articleJsonArray);

    if (wxMpMaterialNews.getCreateTime() != null) {
      newsJson.addProperty("create_time",
        SimpleDateFormat.getDateTimeInstance().format(wxMpMaterialNews.getCreateTime()));
    }

    if (wxMpMaterialNews.getUpdateTime() != null) {
      newsJson.addProperty("update_time",
        SimpleDateFormat.getDateTimeInstance().format(wxMpMaterialNews.getUpdateTime()));
    }

    return newsJson;
  }

  @Override
  public WxMpMaterialNews deserialize(JsonElement jsonElement, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
    WxMpMaterialNews wxMpMaterialNews = new WxMpMaterialNews();
    JsonObject json = jsonElement.getAsJsonObject();
    if (json.get("news_item") != null && !json.get("news_item").isJsonNull()) {
      JsonArray articles = json.getAsJsonArray("news_item");
      for (JsonElement article1 : articles) {
        JsonObject articleInfo = article1.getAsJsonObject();
        WxMpNewsArticle article = WxMpGsonBuilder.create().fromJson(articleInfo, WxMpNewsArticle.class);
        wxMpMaterialNews.addArticle(article);
      }
    }

    if (json.get("create_time") != null && !json.get("create_time").isJsonNull()) {
      Date createTime = new Date(GsonHelper.getAsLong(json.get("create_time"))* 1000);
      wxMpMaterialNews.setCreateTime(createTime);
    }

    if (json.get("update_time") != null && !json.get("update_time").isJsonNull()) {
      Date updateTime = new Date(GsonHelper.getAsLong(json.get("update_time"))* 1000);
      wxMpMaterialNews.setUpdateTime(updateTime);
    }

    return wxMpMaterialNews;
  }
}