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/*
* Copyright (C) 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.android.tv.common.feature;
import android.content.Context;
import android.content.SharedPreferences;
import android.util.Log;
import com.android.tv.common.SharedPreferencesUtils;
/**
* Feature controlled by shared preferences.
*/
public final class SharedPreferencesFeature implements Feature {
private static final String TAG = "SharedPrefFeature";
private static final boolean DEBUG = false;
private final String mKey;
private boolean mEnabled;
private final boolean mDefaultValue;
private SharedPreferences mSharedPreferences;
private final Feature mBaseFeature;
/**
* Create SharedPreferences controlled feature.
*
* @param key the SharedPreferences key.
* @param defaultValue the value to return if the property is undefined or empty.
* @param baseFeature if {@code baseFeature} is turned off, this feature is always disabled.
*/
public SharedPreferencesFeature(String key, boolean defaultValue, Feature baseFeature) {
mKey = key;
mDefaultValue = defaultValue;
mBaseFeature = baseFeature;
}
@Override
public boolean isEnabled(Context context) {
if (!mBaseFeature.isEnabled(context)) {
return false;
}
if (mSharedPreferences == null) {
mSharedPreferences = context.getSharedPreferences(
SharedPreferencesUtils.SHARED_PREF_FEATURES, Context.MODE_PRIVATE);
mEnabled = mSharedPreferences.getBoolean(mKey, mDefaultValue);
}
if (DEBUG) Log.d(TAG, mKey + " is " + mEnabled);
return mEnabled;
}
@Override
public String toString() {
return "SharedPreferencesFeature:key=" + mKey + ",value=" + mEnabled;
}
public void setEnabled(Context context, boolean enable) {
if (DEBUG) Log.d(TAG, mKey + " is set to " + enable);
if (mSharedPreferences == null) {
mSharedPreferences = context.getSharedPreferences(
SharedPreferencesUtils.SHARED_PREF_FEATURES, Context.MODE_PRIVATE);
mEnabled = enable;
mSharedPreferences.edit().putBoolean(mKey, enable).apply();
} else if (mEnabled != enable) {
mEnabled = enable;
mSharedPreferences.edit().putBoolean(mKey, enable).apply();
}
}
}
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