/**
    * Copyright 2010 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.osedu.org/licenses/ECL-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.kuali.student.common.ui.client.application;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.kuali.student.common.rice.authorization.PermissionType;
  import org.kuali.student.common.ui.shared.IdAttributes.IdType;
  
  /**
   * ViewContext can be used to pass along context information when switching or initializing a view.
   * 
   * For example a display view requires the id of the object to display, the view context can be used
   * to pass along that information from a different controller or view.
   *
   */
  public class ViewContext implements Comparable<ViewContext>{
  	
  	public static final String ID_ATR = "docId";
  	public static final String ID_TYPE_ATR = "idType";
  	
  	
  	private Map<String, String> attributes = new HashMap<String, String>();
  	private String id = "";
  	private IdType idType = null;
  	// FIXME: change state to proper default or null
  	private String state = "draft";
  	private PermissionType permissionType;
  
  	public String getId() {
  		return id;
  	}
  
  	/**
  	 * Set the id for this view context, this will appear as part of the address bar when used in
  	 * a controller, the controller can use this id to determine what to show (determine the context)
  	 */
  	public void setId(String id) {
  		this.id = id;
  	}
  
  	public IdType getIdType() {
  		return idType;
  	}
  
  	/**
  	 * Set the type of id for this view context, this will appear as part of the address bar when used in
  	 * a controller
  	 */
  	public void setIdType(IdType idType) {
  		this.idType = idType;
  	}
  	
  	public void setIdType(String idTypeString){
  		this.idType = IdType.fromString(idTypeString);
  	}
  
  	public String getState() {
  		return state;
  	}
  
  	public void setState(String state) {
  		this.state = state;
  	}
  
  	public PermissionType getPermissionType() {
      	return permissionType;
      }
  
  	/**
  	 * Sets the type of permission needed to be at the the current view, this is interpreted by the controller
  	 * if set which checks with the server to see if the user has this kind of permission.  Doesn't appear in
  	 * the address bar
  	 */
  	public void setPermissionType(PermissionType permissionType) {
      	this.permissionType = permissionType;
      }
  
  	@Override
  	public int compareTo(ViewContext o) {
  		if(o.getId().equals(id) && o.getIdType() == idType && o.getAttributes().equals(attributes)){
  			return 0;
  		}
  		else{
  			return -1;
 		}
 	}
 
     /**
      * Add an additional attribute to the view context, this will appear in the address bar like id
      * and type does
      */
     public void setAttribute(String key, String value) {
 		attributes.put(key, value);
 	}
 	
 	public String getAttribute(String key){
 		return attributes.get(key);
 	}
 	
 	public Map<String, String> getAttributes(){
 		return attributes;
 	}
 
 }