package com.jeecms.cms.action.directive;
import static com.jeecms.cms.Constants.TPL_STYLE_LIST;
import static com.jeecms.cms.Constants.TPL_SUFFIX;
import static com.jeecms.cms.web.FrontUtils.PARAM_STYLE_LIST;
import static com.jeecms.common.web.Constants.UTF8;
import static com.jeecms.common.web.freemarker.DirectiveUtils.OUT_LIST;
import static freemarker.template.ObjectWrapper.DEFAULT_WRAPPER;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import com.jeecms.cms.entity.main.CmsSite;
import com.jeecms.cms.entity.main.CmsTopic;
import com.jeecms.cms.manager.main.CmsTopicMng;
import com.jeecms.cms.web.FrontUtils;
import com.jeecms.common.web.freemarker.DirectiveUtils;
import com.jeecms.common.web.freemarker.ParamsRequiredException;
import com.jeecms.common.web.freemarker.DirectiveUtils.InvokeType;
import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;
/**
* 专题列表标签
*
* @author liufang
*
*/
public class CmsTopicListDirective implements TemplateDirectiveModel {
/**
* 模板名称
*/
public static final String TPL_NAME = "topic_list";
/**
* 输入参数，栏目ID。
*/
public static final String PARAM_CHANNEL_ID = "channelId";
/**
* 输入参数，是否推荐。
*/
public static final String PARAM_RECOMMEND = "recommend";
@SuppressWarnings("unchecked")
public void execute(Environment env, Map params, TemplateModel[] loopVars,
TemplateDirectiveBody body) throws TemplateException, IOException {
CmsSite site = FrontUtils.getSite(env);
List<CmsTopic> list = cmsTopicMng.getListForTag(getChannelId(params),
getRecommend(params), FrontUtils.getCount(params));
Map<String, TemplateModel> paramWrap = new HashMap<String, TemplateModel>(
params);
paramWrap.put(OUT_LIST, DEFAULT_WRAPPER.wrap(list));
Map<String, TemplateModel> origMap = DirectiveUtils
.addParamsToVariable(env, paramWrap);
InvokeType type = DirectiveUtils.getInvokeType(params);
String listStyle = DirectiveUtils.getString(PARAM_STYLE_LIST, params);
if (InvokeType.sysDefined == type) {
if (StringUtils.isBlank(listStyle)) {
throw new ParamsRequiredException(PARAM_STYLE_LIST);
}
env.include(TPL_STYLE_LIST + listStyle + TPL_SUFFIX, UTF8, true);
} else if (InvokeType.userDefined == type) {
if (StringUtils.isBlank(listStyle)) {
throw new ParamsRequiredException(PARAM_STYLE_LIST);
}
FrontUtils.includeTpl(TPL_STYLE_LIST, site, env);
} else if (InvokeType.custom == type) {
FrontUtils.includeTpl(TPL_NAME, site, params, env);
} else if (InvokeType.body == type) {
body.render(env.getOut());
} else {
throw new RuntimeException("invoke type not handled: " + type);
}
DirectiveUtils.removeParamsFromVariable(env, paramWrap, origMap);
}
private Integer getChannelId(Map<String, TemplateModel> params)
throws TemplateException {
return DirectiveUtils.getInt(PARAM_CHANNEL_ID, params);
}
private boolean getRecommend(Map<String, TemplateModel> params)
throws TemplateException {
Boolean recommend = DirectiveUtils.getBool(PARAM_RECOMMEND, params);
return recommend != null ? recommend : false;
}
@Autowired
private CmsTopicMng cmsTopicMng;
}