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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Segment.io, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.segment.analytics;

import android.content.SharedPreferences;

class StringCache {
  private final SharedPreferences preferences;
  private final String key;
  private final String defaultValue;

  StringCache(SharedPreferences preferences, String key) {
    this(preferences, key, null);
  }

  StringCache(SharedPreferences preferences, String key, String defaultValue) {
    this.preferences = preferences;
    this.key = key;
    this.defaultValue = defaultValue;
  }

  String get() {
    return preferences.getString(key, defaultValue);
  }

  boolean isSet() {
    return preferences.contains(key);
  }

  void set(String value) {
    preferences.edit().putString(key, value).apply();
  }

  void delete() {
    preferences.edit().remove(key).apply();
  }
}