/**
 *
 * Copyright
 * 2009-2015 Jayway Products AB
 * 2016-2017 Föreningen Sambruk
 *
 * Licensed under AGPL, Version 3.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.gnu.org/licenses/agpl.txt
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package se.streamsource.streamflow.web.rest.resource.admin;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.reflect.Method;

/**
 * Utility for reading template files from resources
 */
public class TemplateUtil
{
   public static String getTemplate( String resourceName, Class resourceClass ) throws IOException
   {
      StringBuilder template = new StringBuilder( "" );
      InputStream in = resourceClass.getResourceAsStream( resourceName );
      BufferedReader reader = new BufferedReader( new InputStreamReader( in ) );
      String line;
      while ((line = reader.readLine()) != null)
         template.append( line + "\n" );
      reader.close();

      return template.toString();
   }

   public static String eval( String template, String... parameters )
   {
      for (int i = 0; i < parameters.length; i += 2)
      {
         String variable = parameters[i];
         String value = parameters[i + 1];

         if (value == null)
            throw new IllegalArgumentException("Value for variable "+variable+" is null");

         template = template.replace( variable, value );
      }

      return template;
   }

   public static String methodList( Class methodClass )
   {
      // List methods
      StringBuilder links = new StringBuilder( "" );
      Method[] methods = methodClass.getMethods();
      for (Method method : methods)
      {
         links.append( "<li><a href=\"" ).append( method.getName() ).append( "/\" rel=\"" )
               .append( method.getName() ).append( "\">" ).append( method.getName() ).append( "</a></li>\n" );
      }

      return links.toString();
   }
}