package com.squeakysand.sling.request;
   
   import com.squeakysand.commons.lang.NullParameterException;
   import com.squeakysand.commons.lang.StringUtils;
   import com.squeakysand.commons.lang.TrimStrategy;
   
   import org.apache.sling.api.request.RequestPathInfo;
   import org.apache.sling.api.resource.Resource;
   import org.apache.sling.engine.impl.request.SlingRequestPathInfo;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * 
   * @author <a href="http://craigsdickson.com">Craig S. Dickson</a>
   */
  public class RequestPathInfoFactory {
  
      private static class SimpleRequestPathInfo implements RequestPathInfo {
  
          private static final Logger LOG = LoggerFactory.getLogger(RequestPathInfoFactory.SimpleRequestPathInfo.class);
  
          private String path;
          private String selectorString;
          private String[] selectors;
          private String extension;
          private String suffix;
  
          /**
           * @param path
           */
          public SimpleRequestPathInfo(String urlPath) {
              if (urlPath == null) {
                  throw new NullParameterException("urlPath");
              }
              if (!urlPath.startsWith("/")) {
                  throw new IllegalArgumentException(String.format("urlPath must be an absolute path, was '%s'", urlPath));
              }
              // int lastDot = urlPath.lastIndexOf(".");
              if (urlPath.contains(".")) {
                  // String extPlusSuffix = urlPath.substring(lastDot + 1);
                  String extPlusSuffix = StringUtils.trimPrefix(urlPath, '.', TrimStrategy.AFTER_LAST);
                  // urlPath = urlPath.substring(0, lastDot);
                  urlPath = StringUtils.trimSuffix(urlPath, '.', TrimStrategy.AT_LAST);
                  // int firstSlash = extPlusSuffix.indexOf("/");
                  if (extPlusSuffix.contains("/")) {
                      // extension = extPlusSuffix.substring(0, firstSlash);
                      extension = StringUtils.trimSuffix(extPlusSuffix, '/', TrimStrategy.AT_FIRST);
                      // suffix = extPlusSuffix.substring(firstSlash);
                      suffix = StringUtils.trimPrefix(extPlusSuffix, '/', TrimStrategy.AT_FIRST);
                  } else {
                      extension = extPlusSuffix;
                      suffix = null;
                  }
                  // int lastSlash = urlPath.lastIndexOf("/");
                  String selectorStr;
                  if (urlPath.contains("/")) {
                      // selectorStr = urlPath.substring(lastSlash + 1);
                      selectorStr = StringUtils.trimPrefix(urlPath, '/', TrimStrategy.AFTER_LAST);
                      // urlPath = urlPath.substring(0, lastSlash + 1);
                      urlPath = StringUtils.trimSuffix(urlPath, '/', TrimStrategy.AFTER_LAST);
                  } else {
                      selectorStr = urlPath;
                  }
                  // int firstDot = selectorStr.indexOf(".");
                  if (selectorStr.contains(".")) {
                      // urlPath = urlPath + selectorStr.substring(0, firstDot);
                      urlPath = urlPath + StringUtils.trimSuffix(selectorStr, '.', TrimStrategy.AT_FIRST);
                      // selectorStr = selectorStr.substring(firstDot + 1);
                      selectorStr = StringUtils.trimPrefix(selectorStr, '.', TrimStrategy.AFTER_FIRST);
                  } else {
                      urlPath = urlPath + selectorStr;
                      selectorStr = null;
                  }
                  path = urlPath;
                  if (selectorStr == null) {
                      selectorString = null;
                      selectors = new String[0];
                  } else {
                      selectorString = selectorStr;
                      selectors = selectorStr.split("\\.");
                  }
              } else {
                  path = urlPath;
                  selectorString = null;
                  selectors = new String[0];
                  extension = null;
                  suffix = null;
              }
          }
  
          /**
           * @see org.apache.sling.api.request.RequestPathInfo#getExtension()
           */
          @Override
          public String getExtension() {
              return extension;
          }
  
         /**
          * @see org.apache.sling.api.request.RequestPathInfo#getResourcePath()
          */
         @Override
         public String getResourcePath() {
             return path;
         }
 
         /**
          * @see org.apache.sling.api.request.RequestPathInfo#getSelectors()
          */
         @Override
         public String[] getSelectors() {
             return selectors;
         }
 
         /**
          * @see org.apache.sling.api.request.RequestPathInfo#getSelectorString()
          */
         @Override
         public String getSelectorString() {
             return selectorString;
         }
 
         /**
          * @see org.apache.sling.api.request.RequestPathInfo#getSuffix()
          */
         @Override
         public String getSuffix() {
             return suffix;
         }
 
     }
 
     public static RequestPathInfo create(Resource resource) {
         return new SlingRequestPathInfo(resource);
     }
 
     public static RequestPathInfo create(String path) {
         return new SimpleRequestPathInfo(path);
     }
 
 }