package org.kuali.student.core.dto;
   
   public class DtoConstants {
    
   	public static final String DTO_STATE = "DtoState";
   	public static final String DTO_NEXT_STATE = "DtoNextState"; 
   
   	//FIXME: Need to split out proposal states (ie. workflow states) versus dto states
   	public enum DtoState {
  		DRAFT, SUBMITTED, APPROVED, ACTIVE, INACTIVE, RETIRED, SUPERSEDED, SAVED, ENROUTE;
  
  		public boolean equalsString(String state){
  			if (state != null){
  				return this.toString().equals(state.toUpperCase());
  			}
  			
  			return false;
  		}
  		
  		/**
  	     * This is used to determine the next state.
  	     * 
  	     * TODO: Ideally this method should not be hardcoded here.  Also determining next state may
  	     * be a more complicated and not just be a simple sequence.
  	     * 
  	     * @param state
  	     * @return the next state
  	     */
  		public static DtoState getNextState(String state){
  			// Element States
  			if (DRAFT.equalsString(state)) {
  	            return SUBMITTED;
  	        } else if (SUBMITTED.equalsString(state)) {
  	            return APPROVED;
  	        } else if (APPROVED.equalsString(state)) {
  	        	return ACTIVE;
  	        } else if (ACTIVE.equalsString(state)) {
  	        	return INACTIVE;
  	        } else if (INACTIVE.equalsString(state)) {
  	        	return RETIRED;
  	        
  	        // Proposal States
  	        } else if (SAVED.equalsString(state)) {
  	        	return ENROUTE;
  	        } else if (ENROUTE.equalsString(state)) {
  	        	return APPROVED;
  	        }
  					
  			
  			return null;
  		}
  		
  		public static String getNextStateAsString(String state){
  			DtoState dtoState = getNextState(state);
  			if (dtoState == null){
  				return null;
  			} else {
  				return dtoState.toString();
  			}
  		}
  	}
  }