package com.atlassian.plugin.web.renderer;
   
   import com.atlassian.plugin.Plugin;
   import com.google.common.io.CharStreams;
   
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.InputStreamReader;
   import java.io.Writer;
  import java.util.Map;
  
  /**
   * Static {@link WebPanelRenderer}, just returns the supplied text.
   */
  public class StaticWebPanelRenderer implements WebPanelRenderer {
      public static final StaticWebPanelRenderer RENDERER = new StaticWebPanelRenderer();
      public static final String RESOURCE_TYPE = "static";
  
      public String getResourceType() {
          return RESOURCE_TYPE;
      }
  
      public void render(String templateName, Plugin plugin, Map<String, Object> context, Writer writer) throws RendererException, IOException {
          try (InputStreamReader in = new InputStreamReader(loadTemplate(plugin, templateName))) {
              CharStreams.copy(in, writer);
          }
      }
  
      public String renderFragment(String fragment, Plugin plugin, Map<String, Object> context) throws RendererException {
          return fragment;
      }
  
      public void renderFragment(Writer writer, String fragment, Plugin plugin, Map<String, Object> context) throws RendererException, IOException {
          writer.write(fragment);
      }
  
      private InputStream loadTemplate(Plugin plugin, String templateName) throws IOException {
          InputStream in = plugin.getClassLoader().getResourceAsStream(templateName);
          if (in == null) {
              // template not found in the plugin, try the host application:
              if ((in = getClass().getResourceAsStream(templateName)) == null) {
                  throw new RendererException(String.format("Static web panel template %s not found.", templateName));
              }
          }
          return in;
      }
  }