/**
    * Copyright 2011-2019 PrimeFaces Extensions
    *
    * 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 org.primefaces.extensions.config;
  
  import javax.faces.context.FacesContext;
  import javax.servlet.ServletContext;
  import org.primefaces.util.LangUtils;
  
  /**
   * @since 8.0.1
   */
  public class PrimeExtensionsEnvironment {
  
      public static final String INSTANCE_KEY = PrimeExtensionsEnvironment.class.getName();
  
      private boolean libphonenumberAvailable;
  
      public PrimeExtensionsEnvironment(FacesContext facesContext) {
          libphonenumberAvailable = LangUtils.tryToLoadClassForName("com.google.i18n.phonenumbers.Phonenumber") != null;
      }
  
      public static PrimeExtensionsEnvironment getCurrentInstance(FacesContext context) {
          if (context == null || context.getExternalContext() == null) {
              return null;
          }
  
          PrimeExtensionsEnvironment pfeEnv = getFromContext(context);
          if (pfeEnv == null) {
              pfeEnv = new PrimeExtensionsEnvironment(context);
              setCurrentInstance(pfeEnv, context);
          }
  
          return pfeEnv;
      }
  
      private static PrimeExtensionsEnvironment getFromContext(FacesContext context) {
          return (PrimeExtensionsEnvironment) context.getExternalContext().getApplicationMap().get(INSTANCE_KEY);
      }
  
      public static void setCurrentInstance(PrimeExtensionsEnvironment pfeEnv, FacesContext context) {
          context.getExternalContext().getApplicationMap().put(INSTANCE_KEY, pfeEnv);
  
          if (context.getExternalContext().getContext() instanceof ServletContext) {
              ((ServletContext) context.getExternalContext().getContext()).setAttribute(INSTANCE_KEY, pfeEnv);
          }
      }
  
      public boolean isLibphonenumberAvailable() {
          return libphonenumberAvailable;
      }
  
  }