/*
    * Copyright 2008 FatWire Corporation. All Rights Reserved.
    *
    * Licensed under the Apache 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.apache.org/licenses/LICENSE-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 com.fatwire.gst.foundation.facade.assetapi;
  
  import COM.FutureTense.Interfaces.ICS;
  
  import com.fatwire.assetapi.data.AssetId;
  import com.openmarket.xcelerate.asset.AssetIdImpl;
  
  import org.apache.commons.lang.StringUtils;
  
  /**
   * Utility class for working with Asset IDs
   * 
   * @author Tony Field
   * @since Mar 9, 2011
   */
  public final class AssetIdUtils {
      private AssetIdUtils() {
      }
  
      /**
       * Convert a string in the form assettype:assetid into an AssetId object.
       * 
       * @param s string in the form assettype:assetid
       * @return AsseId object
       * @throws IllegalArgumentException if input is bad
       * 
       */
      public static AssetId fromString(String s) {
          if (s == null)
              throw new IllegalArgumentException("Invalid null input.");
          int colon = s.indexOf(":");
          if (colon < 1)
              throw new IllegalArgumentException("Invalid input: " + s);
          if (colon == s.length())
              throw new IllegalArgumentException("Invalid input: " + s);
          String type = s.substring(0, colon);
          String sId = s.substring(colon + 1);
          try {
              return new AssetIdImpl(type, Long.valueOf(sId));
          } catch (NumberFormatException e) {
              throw new IllegalArgumentException("Invalid input: " + s, e);
          }
      }
  
      /**
       * Converts an AssetId into a String of the form assettype:id.
       * 
       * @param id
       * @return the assetid as a String in the form of assettype:id.
       */
      public static String toString(AssetId id) {
          if (id == null)
              throw new IllegalArgumentException("Invalid null input.");
          return id.getType() + ":" + Long.toString(id.getId());
      }
  
      /**
       * Creates an AssetId out of 'c' and 'cid' variables on ICS context.
       * 
       * @param ics
       * @return AssetId from c and cid
       * @throws IllegalArgumentException if c or cid is blank.
       */
      public static AssetId currentId(ICS ics) {
          String c = ics.GetVar("c");
          String cid = ics.GetVar("cid");
          if (StringUtils.isBlank(c)) {
              throw new IllegalArgumentException(
                      "CS variable 'c' is not found, cannot make an AssetId of current ICS context");
          }
          if (StringUtils.isBlank(cid)) {
              throw new IllegalArgumentException(
                      "CS variable 'cid' is not found, cannot make an AssetId of current ICS context");
          }
          return new AssetIdImpl(c, Long.parseLong(cid));
      }
  
      /**
       * Creates an AssetId out of 'p' variable on ICS context with type 'Page'.
       * 
       * @param ics
       * @return AssetId with id from 'p'.
       * @throws IllegalArgumentException if p is blank.
      */
     public static AssetId currentPageId(ICS ics) {
         String p = ics.GetVar("p");
 
         if (StringUtils.isBlank(p)) {
             throw new IllegalArgumentException(
                     "CS variable 'p' is not found, cannot make an AssetId of current ICS context");
         }
         return new AssetIdImpl("Page", Long.parseLong(p));
     }
 
     /**
      * Creates an AssetId from c and cid parameters.
      * 
      * @param c the assetype
      * @param cid the assetid, must be a String representing a long value
      * @return AssetId with c and cid paramters
      * @throws IllegalArgumentException if c or cid is blank.
      */
     public static AssetId createAssetId(String c, String cid) {
         if (StringUtils.isBlank(c)) {
             throw new IllegalArgumentException("'c' is blank, cannot make an AssetId of current ICS context");
         }
         if (StringUtils.isBlank(cid)) {
             throw new IllegalArgumentException("'cid' is blank, cannot make an AssetId of current ICS context");
         }
         return new AssetIdImpl(c, Long.parseLong(cid));
     }
 
     /**
      * Creates an AssetId from c and cid parameters.
      * 
      * @param c the assetype.
      * @param cid the assetid.
      * @return AssetId with c and cid paramters.
      * @throws IllegalArgumentException is c is blank
      */
     public static AssetId createAssetId(String c, long cid) {
         if (StringUtils.isBlank(c)) {
             throw new IllegalArgumentException("'c' is blank, cannot make an AssetId of current ICS context");
         }
         return new AssetIdImpl(c, cid);
     }
 
 }