/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

package org.libreoffice.androidapp;

import android.content.SharedPreferences;

public class SettingsListenerModel {

    public interface OnSettingsPreferenceChangedListener {
        void settingsPreferenceChanged(SharedPreferences sharedPreferences, String key);
    }

    private static SettingsListenerModel mInstance;
    private OnSettingsPreferenceChangedListener mListener;
    private SharedPreferences sharedPreferences;
    private String key;

    private SettingsListenerModel() {}

    public static SettingsListenerModel getInstance() {
        if(mInstance == null) {
            mInstance = new SettingsListenerModel();
        }
        return mInstance;
    }

    public void setListener(OnSettingsPreferenceChangedListener listener) {
        mListener = listener;
    }

    public void changePreferenceState(SharedPreferences sharedPreferences, String key) {
        if(mListener != null) {
            this.sharedPreferences = sharedPreferences;
            this.key = key;
            notifyPreferenceChange(sharedPreferences, key);
        }
    }

    public SharedPreferences getSharedPreferences() {
        return sharedPreferences;
    }

    public String getKey(){
        return key;
    }

    private void notifyPreferenceChange(SharedPreferences preferences, String key) {
        mListener.settingsPreferenceChanged(preferences, key);
    }
}

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