SessionManager.java

package com.mydietitian.android.utils;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import com.mydietitian.android.activities.LoginActivity;

/**
 * User: jpotts
 * Date: 8/27/13
 * Time: 7:00 PM
 */

public class SessionManager {

    private static SessionManager instance;

    SharedPreferences pref;
    Editor editor;
    Context context;

    private int PRIVATE_MODE = 0;
    private static String PREF_NAME = "";
    private static final String IS_LOGIN = "IsLoggedIn";
    public static final String KEY_TOKEN = "name";
    public static final String KEY_EMAIL = "email";

    // Constructor
    private SessionManager(Context context){
        this.context = context;
        PREF_NAME = context.getPackageName();
        pref = this.context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
        editor = pref.edit();
    }

    public SessionManager getInstance(Context context){
        if(instance == null){
            instance = new SessionManager(context);
        }
        return instance;
    }

    public void createLoginSession(String token, String email){
        editor.putBoolean(IS_LOGIN, true);
        editor.putString(KEY_TOKEN, token);
        editor.putString(KEY_EMAIL, email);
        editor.commit();
    }

    public void checkLogin(){
        // Check login status
        if(!this.isLoggedIn()){
            redirectOnLogout(LoginActivity.class);
        }
    }


    public void logoutUser(){
        clearUserSettings();
        redirectOnLogout(LoginActivity.class);
    }

    public void redirectOnLogout(Class loginActivity){

        Intent i = new Intent(context, loginActivity);

        // clear stack and start new activity
        i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        context.startActivity(i);
    }

    public void clearUserSettings(){
        // Clearing all data from Shared Preferences
        editor.clear();
        editor.commit();
    }

    // Get Login State
    public boolean isLoggedIn(){
        return pref.getBoolean(IS_LOGIN, false);
    }

    public String getToken() {
        return pref.getString(KEY_TOKEN, "");
    }

    public void setToken(String token) {
        editor.putString(KEY_TOKEN, token);
        editor.commit();
    }

    public String getEmail(){
        return pref.getString(KEY_EMAIL, "");

    }

    public void setEmail(String email) {
        editor.putString(KEY_EMAIL, "");
        editor.commit();
    }
}