package com.atlassian.plugin.web.model;
   
   import com.atlassian.plugin.PluginParseException;
   import com.atlassian.plugin.web.ContextProvider;
   import com.atlassian.plugin.web.WebFragmentHelper;
   import com.atlassian.plugin.web.descriptors.WebFragmentModuleDescriptor;
   import org.dom4j.Element;
   
   import javax.servlet.http.HttpServletRequest;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * A simple bean to represent labels in the web interface.
   */
  public class DefaultWebLabel extends DefaultWebParam implements WebLabel {
      private final String key;
      private final String noKeyValue;
  
      public DefaultWebLabel(Element labelEl, WebFragmentHelper webFragmentHelper, ContextProvider contextProvider, WebFragmentModuleDescriptor descriptor) throws PluginParseException {
          super(labelEl, webFragmentHelper, contextProvider, descriptor);
          if (labelEl == null) {
              throw new PluginParseException("You must specify a label for the section.");
          } else {
              this.key = labelEl.attributeValue("key");
  
              if (this.key == null) {
                  this.noKeyValue = labelEl.getTextTrim();
              } else {
                  this.noKeyValue = null;
              }
          }
      }
  
      public String getKey() {
          return key;
      }
  
      public String getNoKeyValue() {
          return noKeyValue;
      }
  
      public String getDisplayableLabel(HttpServletRequest req, Map<String, Object> origContext) {
          final Map<String, Object> tmpContext = new HashMap<>(origContext);
          tmpContext.putAll(getContextMap(tmpContext));
          if (key != null) {
              if (params == null || params.isEmpty()) {
                  return getWebFragmentHelper().getI18nValue(key, null, tmpContext);
              } else {
                  final List<String> arguments = new ArrayList<>();
  
                  // we know here because it's a tree map that the params are in alphabetical order
                  for (Map.Entry<String, String> entry : params.entrySet()) {
                      if (entry.getKey().startsWith("param"))
                          arguments.add(getWebFragmentHelper().renderVelocityFragment(entry.getValue(), tmpContext));
                  }
  
                  return getWebFragmentHelper().getI18nValue(key, arguments, tmpContext);
              }
          } else {
              return getWebFragmentHelper().renderVelocityFragment(noKeyValue, tmpContext);
          }
      }
  }