/*
 * Copyright (C) 2014 The CyanogenMod 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 org.cyanogenmod.themes.provider;

import android.content.Context;
import android.content.SharedPreferences;

import java.util.HashSet;
import java.util.Set;

public class PreferenceUtils {
    public static final String PREF_INSTALLED_THEMES_PROCESSING = "installed_themes_processing";

    public static SharedPreferences getSharedPreferences(Context context) {
        if (context == null) return null;
        return context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
    }

    public static Set<String> getInstalledThemesBeingProcessed(Context context) {
        SharedPreferences prefs = getSharedPreferences(context);
        if (prefs == null) return null;

        return prefs.getStringSet(PREF_INSTALLED_THEMES_PROCESSING, null);
    }

    public static void addThemeBeingProcessed(Context context, String pkgName) {
        SharedPreferences prefs = getSharedPreferences(context);
        if (prefs != null) {
            Set<String> updatedThemes = new HashSet<String>();
            Set<String> current = prefs.getStringSet(PREF_INSTALLED_THEMES_PROCESSING, null);
            if (current != null) {
                updatedThemes.addAll(current);
            }
            if (updatedThemes.add(pkgName)) {
                prefs.edit().putStringSet(PREF_INSTALLED_THEMES_PROCESSING, updatedThemes).apply();
            }
        }
    }

    public static void removeThemeBeingProcessed(Context context, String pkgName) {
        SharedPreferences prefs = getSharedPreferences(context);
        if (prefs != null) {
            Set<String> updatedThemes = new HashSet<String>();
            Set<String> current = prefs.getStringSet(PREF_INSTALLED_THEMES_PROCESSING, null);
            if (current != null) {
                updatedThemes.addAll(current);
            }
            if (updatedThemes.remove(pkgName)) {
                prefs.edit().putStringSet(PREF_INSTALLED_THEMES_PROCESSING, updatedThemes).apply();
            }
        }
    }
}