content: /*
   * Copyright 2015, The Android Open Source Project
   *
   * 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.example.android.testing.unittesting.BasicSample;
  
  import android.content.SharedPreferences;
  
  import java.util.Calendar;
  
  /**
   *  Helper class to manage access to {@link SharedPreferences}.
   */
  public class SharedPreferencesHelper {
  
      // Keys for saving values in SharedPreferences.
      static final String KEY_NAME = "key_name";
      static final String KEY_DOB = "key_dob_millis";
      static final String KEY_EMAIL = "key_email";
  
      // The injected SharedPreferences implementation to use for persistence.
      private final SharedPreferences mSharedPreferences;
  
      /**
       * Constructor with dependency injection.
       *
       * @param sharedPreferences The {@link SharedPreferences} that will be used in this DAO.
       */
      public SharedPreferencesHelper(SharedPreferences sharedPreferences) {
          mSharedPreferences = sharedPreferences;
      }
  
      /**
       * Saves the given {@link SharedPreferenceEntry} that contains the user's settings to
       * {@link SharedPreferences}.
       *
       * @param sharedPreferenceEntry contains data to save to {@link SharedPreferences}.
       * @return {@code true} if writing to {@link SharedPreferences} succeeded. {@code false}
       *         otherwise.
       */
      public boolean savePersonalInfo(SharedPreferenceEntry sharedPreferenceEntry){
          // Start a SharedPreferences transaction.
          SharedPreferences.Editor editor = mSharedPreferences.edit();
          editor.putString(KEY_NAME, sharedPreferenceEntry.getName());
          editor.putLong(KEY_DOB, sharedPreferenceEntry.getDateOfBirth().getTimeInMillis());
          editor.putString(KEY_EMAIL, sharedPreferenceEntry.getEmail());
  
          // Commit changes to SharedPreferences.
          return editor.commit();
      }
  
      /**
       * Retrieves the {@link SharedPreferenceEntry} containing the user's personal information from
       * {@link SharedPreferences}.
       *
       * @return the Retrieved {@link SharedPreferenceEntry}.
       */
      public SharedPreferenceEntry getPersonalInfo() {
          // Get data from the SharedPreferences.
          String name = mSharedPreferences.getString(KEY_NAME, "");
          Long dobMillis =
                  mSharedPreferences.getLong(KEY_DOB, Calendar.getInstance().getTimeInMillis());
          Calendar dateOfBirth = Calendar.getInstance();
          dateOfBirth.setTimeInMillis(dobMillis);
          String email = mSharedPreferences.getString(KEY_EMAIL, "");
  
          // Create and fill a SharedPreferenceEntry model object.
          return new SharedPreferenceEntry(name, dateOfBirth, email);
      }
  }
  