package pl.psnc.dl.ege.webapp.request;
   
   import javax.servlet.http.HttpServletRequest;
   
   import pl.psnc.dl.ege.types.DataType;
   
   /**
    * <p>RequestResolver extension for validation operation of web service.</p>
    * Decodes request URL and marks one of the available validation operations.
   * 
   * @author mariuszs
   */
  public class ValidationRequestResolver extends RequestResolver
  {
  	private static final String SLICE_BASE = "Validation/";
  	
  	
  	public ValidationRequestResolver(HttpServletRequest request, Method method) throws RequestResolvingException{
  		this.request = request;
  		this.method = method;
  		init();
  	}
  	
  	private void init() throws RequestResolvingException{
  		if(method.equals(Method.POST)){
  			resolvePOST();
  		}
  		else if(method.equals(Method.GET)){
  			resolveGET();
  		}
  	}
  	
  	private void resolvePOST() throws RequestResolvingException{
  		String[] queries = resolveQueries();
  		if(queries.length > 1){
  			DataType dataType = decodeDataType(queries[1]);
  			data = dataType;
  			operation = OperationId.PERFORM_VALIDATION;
  		}
  		else{
  			throw new RequestResolvingException(RequestResolvingException.Status.BAD_REQUEST);
  		}
  	}
  	
  	private void resolveGET() throws RequestResolvingException{
  		String[] queries = resolveQueries();
  		if(queries.length == 1){
  			 operation = OperationId.PRINT_VALIDATIONS;
  		}
  		else{
  			throw new RequestResolvingException(RequestResolvingException.Status.WRONG_METHOD);
  		}
  	}
  	
  	private String[] resolveQueries()
  	{
  		String params = request.getRequestURL().toString();
  		params = (params.endsWith(SLASH) ? params : params + SLASH);
  		params = params.substring(params.indexOf(SLICE_BASE),
  			params.length());
  		String[] queries = params.split(SLASH);
  		return queries;
  	}
  	
  	
  	@Override
  	public String getLocale()
  	{
  		return null;
  	}
  	
  }