PrefsUtil.java

package net.hockeyapp.android.utils;

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

/**
 * <h3>Description</h3>
 *
 * {@link SharedPreferences} helper class
 *
 */
public class PrefsUtil {
    private SharedPreferences mFeedbackTokenPrefs;
    private SharedPreferences.Editor mFeedbackTokenPrefsEditor;
    private SharedPreferences mNameEmailSubjectPrefs;
    private SharedPreferences.Editor mNameEmailSubjectPrefsEditor;

    /**
     * Private constructor prevents instantiation from other classes
     */
    private PrefsUtil() {
    }

    /**
     * PrefsUtilHolder is loaded on the first execution of WbUtil.getInstance()
     * or the first access to PrefsUtilHolder.INSTANCE, not before.
     */
    private static class PrefsUtilHolder {
        public static final PrefsUtil INSTANCE = new PrefsUtil();
    }

    /**
     * Return the singleton.
     *
     * @return the singleton
     */
    public static PrefsUtil getInstance() {
        return PrefsUtilHolder.INSTANCE;
    }

    /**
     * Save feedback token to {@link SharedPreferences}
     *
     * @param context the context to use
     * @param token   the feedback token
     */
    public void saveFeedbackTokenToPrefs(Context context, String token) {
        if (context != null) {
            mFeedbackTokenPrefs = context.getSharedPreferences(Util.PREFS_FEEDBACK_TOKEN, 0);
            if (mFeedbackTokenPrefs != null) {
                mFeedbackTokenPrefsEditor = mFeedbackTokenPrefs.edit();
                mFeedbackTokenPrefsEditor.putString(Util.PREFS_KEY_FEEDBACK_TOKEN, token);
                mFeedbackTokenPrefsEditor.apply();
            }
        }
    }

    /**
     * Retrieves the feedback token from {@link SharedPreferences}
     *
     * @param context the context to use
     * @return the feedback token
     */
    public String getFeedbackTokenFromPrefs(Context context) {
        if (context == null) {
            return null;
        }

        mFeedbackTokenPrefs = context.getSharedPreferences(Util.PREFS_FEEDBACK_TOKEN, 0);
        if (mFeedbackTokenPrefs == null) {
            return null;
        }

        return mFeedbackTokenPrefs.getString(Util.PREFS_KEY_FEEDBACK_TOKEN, null);
    }

    /**
     * Save name and email to {@link SharedPreferences}
     *
     * @param context the context to use
     * @param name    the user's name
     * @param email   the user's email
     * @param subject the message subject
     */
    public void saveNameEmailSubjectToPrefs(Context context, String name, String email, String subject) {
        if (context != null) {
            mNameEmailSubjectPrefs = context.getSharedPreferences(Util.PREFS_NAME_EMAIL_SUBJECT, 0);
            if (mNameEmailSubjectPrefs != null) {
                mNameEmailSubjectPrefsEditor = mNameEmailSubjectPrefs.edit();
                if (name == null || email == null || subject == null) {
                    mNameEmailSubjectPrefsEditor.putString(Util.PREFS_KEY_NAME_EMAIL_SUBJECT, null);
                } else {
                    mNameEmailSubjectPrefsEditor.putString(Util.PREFS_KEY_NAME_EMAIL_SUBJECT, String.format("%s|%s|%s",
                            name, email, subject));
                }

                mNameEmailSubjectPrefsEditor.apply();
            }
        }
    }

    /**
     * Retrieves the name and email from {@link SharedPreferences}
     *
     * @param context the context to use
     * @return a string with name, email, and subject
     */
    public String getNameEmailFromPrefs(Context context) {
        if (context == null) {
            return null;
        }

        mNameEmailSubjectPrefs = context.getSharedPreferences(Util.PREFS_NAME_EMAIL_SUBJECT, 0);
        if (mNameEmailSubjectPrefs == null) {
            return null;
        }

        return mNameEmailSubjectPrefs.getString(Util.PREFS_KEY_NAME_EMAIL_SUBJECT, null);
    }

}