/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
   *
   * 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 org.apache.myfaces.tobago.renderkit.html.scarborough.standard.tag;
  
  import org.apache.myfaces.tobago.internal.component.AbstractUIInput;
  import org.apache.myfaces.tobago.internal.util.DateFormatUtils;
  import org.apache.myfaces.tobago.renderkit.html.DataAttributes;
  import org.apache.myfaces.tobago.webapp.TobagoResponseWriter;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.faces.context.FacesContext;
  import javax.faces.convert.Converter;
  import javax.faces.convert.DateTimeConverter;
  import java.io.IOException;
  
  public class DateRenderer extends InRenderer {
  
    private static final Logger LOG = LoggerFactory.getLogger(DateRenderer.class);
  
    @Override
    protected void writeAdditionalAttributes(
        FacesContext facesContext, TobagoResponseWriter writer, AbstractUIInput input) throws IOException {
      super.writeAdditionalAttributes(facesContext, writer, input);
  
      String pattern = null;
      Converter help = getConverter(facesContext, input);
      if (help instanceof DateTimeConverter) {
        DateTimeConverter converter = (DateTimeConverter) help;
        pattern = DateFormatUtils.findPattern(converter);
      }
      if (pattern == null) {
        pattern = "yyyy-MM-dd";
        LOG.warn("Can't find the pattern for the converter! DatePicker may not work correctly. "
            + "Trying to use: '" + pattern + "'");
      }
  
      writer.writeAttribute(DataAttributes.PATTERN, pattern, true);
    }
  }