package gboat2.base.view.components;
   
   import gboat2.base.bridge.util.json.JsonUtil;
   import gboat2.base.view.GboatViewException;
   
   import java.util.Map;
   import java.util.Map.Entry;
   import java.util.Set;
   
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.struts2.components.UIBean;
  import org.apache.struts2.views.annotations.StrutsTag;
  import org.apache.struts2.views.annotations.StrutsTagAttribute;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.node.ArrayNode;
  import com.fasterxml.jackson.databind.node.ObjectNode;
  import com.opensymphony.xwork2.util.ValueStack;
  
  /**
   * <p>
   * 创建一个浮动的附件查看列表
   * </p>
   * 示例代码：
   * <pre>
   * <code>
   * &lt;g2:attachSequence attachMap="attachMap"/&gt;
   * </code>
   * </pre>
   * @date 2014年7月8日
   * @author <a href="mailto:[email protected]">何明旺</a>
   * @since 3.0.0-SNAPSHOT
   */
  @StrutsTag(
          name = "attachSequence",
          tldTagClass = "gboat2.base.view.jsp.AttachSequenceTag",
          description = "创建一个浮动的附件查看列表",
          allowDynamicAttributes=true)
  public class AttachSequence extends UIBean {
  
  	public static final String TEMPLATE = "attach-sequence";
  
  	protected String attachMap;
  	protected String downloadUrl;
  
  	public AttachSequence(ValueStack stack, HttpServletRequest request, HttpServletResponse response) {
  		super(stack, request, response);
  	}
  
  	@Override
  	protected String getDefaultTemplate() {
  		return TEMPLATE;
  	}
  
  	@SuppressWarnings({ "unchecked", "rawtypes" })
      @Override
  	public void evaluateExtraParams() {
  		super.evaluateExtraParams();
  		
  		Object obj = findValue(attachMap);
  		if(obj == null)
  		    throw new GboatViewException("附件的配置对象及其对应的附件列表的映射关系（Map）不能为空");
  
          ObjectMapper om = JsonUtil.generateMapper();
          ArrayNode array = om.createArrayNode();
          if (obj instanceof Map) {
              Set<Entry> entrySet = ((Map) obj).entrySet();
              for (Entry entry : entrySet) {
                  ObjectNode node = om.createObjectNode();
                  node.put("attachConfig", om.valueToTree(entry.getKey()));
                  node.put("uploadeds", om.valueToTree(entry.getValue()));
                  array.add(node);
              }
          } else if ((obj instanceof String) && ((String) obj).startsWith("{")) {
              // 此 if 是为了与老版本的附件上传组件使用的 JSON 数据保持兼容
              // 老版本返回的 JSON 串中全部都是使用的单引号
              String json = ((String) obj).replace('\'', '"');
              ObjectNode root = JsonUtil.json2Object(json, ObjectNode.class);
              ArrayNode types = root.withArray("types");
              ArrayNode allUploadeds = root.withArray("uploadeds");
              for (int i = 0; i < types.size(); i++) {
                  JsonNode attachConfig = types.get(i);
                  ArrayNode uploadeds = om.createArrayNode();
                  for (int j = 0; j < allUploadeds.size(); j++) {
                      JsonNode attach = allUploadeds.get(j);
                      if (attach.get("configId").asText().equals(attachConfig.get("configId").asText())) {
                          uploadeds.add(attach);
                      }
                  }
  
                  ObjectNode node = om.createObjectNode();
                  node.put("attachConfig", attachConfig);
                  node.put("uploadeds", uploadeds);
                  array.add(node);
              }
          } else {
             throw new GboatViewException("附件上传组件的 attachMap 属性值类型不匹配，只支持 java.util.Map 和 java.lang.String");
         }
 
 		addParameter("attachMap", obj);
 		addParameter("attachArray", array);
 		
 		if(downloadUrl != null)
 		    addParameter("downloadUrl", findString(downloadUrl));
 		
 	}
 
     @StrutsTagAttribute(description="附件的配置对象及其对应的附件列表的映射关系（Map）， key 的类型为 gboat2.attachment.model.AttachConfig， value 的类型为 java.util.List<gboat2.attachment.model.Attachment>", required = true)
     public void setAttachMap(String attachMap) {
         this.attachMap = attachMap;
     }
 
     @StrutsTagAttribute(description = "下载附件的 URL", defaultValue = "upload!download.do")
     public void setDownloadUrl(String downloadUrl) {
         this.downloadUrl = downloadUrl;
     }
 
 }