/*
    * Copyright 2007-2008 The Kuali Foundation
    * 
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    * 
   * 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.kuali.rice.kns.authorization;
  
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.kns.datadictionary.mask.MaskFormatter;
  import org.kuali.rice.kns.util.KNSConstants;
  import org.kuali.rice.kns.web.ui.Field;
  
  public class BusinessObjectRestrictionsBase implements
  		BusinessObjectRestrictions {
  	private Map<String, MaskFormatter> partiallyMaskedFields;
  	private Map<String, MaskFormatter> fullyMaskedFields;
  
  	protected Set<String> allRestrictedFields;
  
  	public BusinessObjectRestrictionsBase() {
  		clearAllRestrictions();
  	}
  
  	public boolean hasAnyFieldRestrictions() {
  		return !partiallyMaskedFields.isEmpty() || !fullyMaskedFields.isEmpty();
  	}
  
  	public boolean hasRestriction(String fieldName) {
  		return isPartiallyMaskedField(fieldName) || isFullyMaskedField(fieldName);
  	}
  
  	public void addFullyMaskedField(String fieldName,
  			MaskFormatter maskFormatter) {
  		fullyMaskedFields.put(fieldName, maskFormatter);
  	}
  
  	public void addPartiallyMaskedField(String fieldName,
  			MaskFormatter maskFormatter) {
  		partiallyMaskedFields.put(fieldName, maskFormatter);
  	}
  
  	/**
  	 * 
  	 * This method returns the authorization setting for the given field name.
  	 * If the field name is not restricted in any way, a default full-editable
  	 * value is returned.
  	 * 
  	 * @param fieldName
  	 *            - name of field to get authorization restrictions for.
  	 * @return a populated FieldAuthorization class for this field
  	 * 
  	 */
  	public FieldRestriction getFieldRestriction(String fieldName) {
  		if (hasRestriction(fieldName)) {
  			FieldRestriction fieldRestriction = null;
  			if (isPartiallyMaskedField(fieldName)) {
  				fieldRestriction = new FieldRestriction(fieldName,
  						Field.PARTIALLY_MASKED);
  				fieldRestriction.setMaskFormatter(partiallyMaskedFields
  						.get(normalizeFieldName(fieldName)));
  			}
  			if (isFullyMaskedField(fieldName)) {
  				fieldRestriction = new FieldRestriction(fieldName, Field.MASKED);
  				fieldRestriction.setMaskFormatter(fullyMaskedFields
  						.get(normalizeFieldName(fieldName)));
  			}
  			return fieldRestriction;
  		} else {
  			return new FieldRestriction(fieldName, Field.EDITABLE);
  		}
  	}
  
  	public void clearAllRestrictions() {
  		partiallyMaskedFields = new HashMap<String, MaskFormatter>();
  		fullyMaskedFields = new HashMap<String, MaskFormatter>();
  		allRestrictedFields = null;
  	}
  	
  	
  	/**
  	 * This method is used to convert field names on forms into a format that's compatible with field names
  	 * that are registered with a restriction.  The base implementation of this method just returns the string.
  	 * 
  	 * @param fieldName The field name that would be rendered on a form
 	 * @return
 	 */
 	protected String normalizeFieldName(String fieldName) {
 		return fieldName;
 	}
 	
 	protected boolean isFullyMaskedField(String fieldName) {
 		String normalizedFieldName = normalizeFieldName(fieldName);
 		return fullyMaskedFields.containsKey(normalizedFieldName);
 	}
 	
 	protected boolean isPartiallyMaskedField(String fieldName) {
 		String normalizedFieldName = normalizeFieldName(fieldName);
 		return partiallyMaskedFields.containsKey(normalizedFieldName);
 	}
 }