Add ImportantNoticeUtils class

/*

 * Copyright (C) 2014 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.inputmethod.latin.utils;

import android.content.Context;

import android.content.SharedPreferences;

import android.provider.Settings;

import android.provider.Settings.SettingNotFoundException;

import android.util.Log;

public final class ImportantNoticeUtils {

    private static final String TAG = ImportantNoticeUtils.class.getSimpleName();

    // The current version number of an important notice.

    // This number must be incremented whenever users should see a new important notice.

    private static final int CURRENT_IMPORTANT_NOTICE_VERSION = 0;

    // {@link SharedPreferences} name to save the last important notice version that has been

    // displayed to users.

    private static final String PREFERENCE_NAME = "important_notice";

    private static final String KEY_IMPORTANT_NOTICE_VERSION = "important_notice_version";

    // Copy of the hidden {@link Settings.Secure#USER_SETUP_COMPLETE} settings key.

    // The value is zero until each multiuser completes system setup wizard.

    // Caveat: This is a hidden API.

    private static final String Settings_Secure_USER_SETUP_COMPLETE = "user_setup_complete";

    private static final int USER_SETUP_IS_NOT_COMPLETE = 0;

    private ImportantNoticeUtils() {

        // This utility class is not publicly instantiable.

    }

    public static boolean isInSystemSetupWizard(final Context context) {

        try {

            final int userSetupComplete = Settings.Secure.getInt(

                    context.getContentResolver(), Settings_Secure_USER_SETUP_COMPLETE);

            return userSetupComplete == USER_SETUP_IS_NOT_COMPLETE;

        } catch (final SettingNotFoundException e) {

            Log.w(TAG, "Can't find settings in Settings.Secure: key="

                    + Settings_Secure_USER_SETUP_COMPLETE);

            return false;

        }

    }

    private static SharedPreferences getImportantNoticePreferences(final Context context) {

        return context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);

    }

    public static boolean hasNewImportantNotice(final Context context) {

        final SharedPreferences prefs = getImportantNoticePreferences(context);

        final int lastVersion = prefs.getInt(KEY_IMPORTANT_NOTICE_VERSION, 0);

        return CURRENT_IMPORTANT_NOTICE_VERSION > lastVersion;

    }

    public static void updateLastImportantNoticeVersion(final Context context) {

        final SharedPreferences prefs = getImportantNoticePreferences(context);

        prefs.edit()

                .putInt(KEY_IMPORTANT_NOTICE_VERSION, CURRENT_IMPORTANT_NOTICE_VERSION)

                .apply();

    }

}