package com.abc.intech1;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONException;
import org.json.JSONObject;

/**
 * Created by selva on 3/7/2018.
 */

public class loginactivity extends Activity
{
    Button btnlogin;
    EditText tusername,tpassword;
    TextView msg;
    ProgressDialog pDialog;
    String username,password;
    private static final String url_login = "http://192.168.1.79:8080/webapp1/loginservlet";
    JSONParser jsonParser = new JSONParser();
    public void onCreate(Bundle b)
    {
        super.onCreate(b);
        setContentView(R.layout.loginlayout);
        //mapping
        btnlogin=findViewById(R.id.btnlogin);
        tusername=findViewById(R.id.tusername);
        tpassword=findViewById(R.id.tpassword);
        msg=findViewById(R.id.msg);

        btnlogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                username=tusername.getText().toString();
                password=tpassword.getText().toString();
                if(username.length()==0 || password.length()==0)
                {
                    msg.setText("Username or password is missing");
                }
                else
                {
                    username=tusername.getText().toString();
                    password=tpassword.getText().toString();
                    new getlogindetails().execute();

                }
            }
        });
    }
    class getlogindetails extends AsyncTask<String, String, String>
    {
        protected void onPreExecute()
        {
            super.onPreExecute();
            pDialog = new ProgressDialog(loginactivity.this);
            pDialog.setMessage("Logging in. Please wait...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }
        protected String doInBackground(String... params)
        {
            int success;
            try
            {
                Uri.Builder builder = new Uri.Builder()
                        .appendQueryParameter("username", username)
                        .appendQueryParameter("password", password);
                String query = builder.build().getEncodedQuery();
                JSONObject json = jsonParser.makeHttpRequest(url_login, query);
                if(json !=null)
                {
                    Log.d("Login", json.toString());
                    success = json.getInt("result");
                    if (success == 1)
                    {
                        Intent myintent = new Intent(getApplicationContext(), menuactivity.class);
                        startActivity(myintent);
                    }
                    else
                    {
                        loginactivity.this.runOnUiThread(new Runnable()
                        {
                            public void run()
                            {
                                Toast.makeText(getApplicationContext(), "Not Found", Toast.LENGTH_LONG).show();
                            }
                        });
                    }
                }
                else
                {
                    loginactivity.this.runOnUiThread(new Runnable()
                    {
                        public void run()
                        {
                            Toast.makeText(loginactivity.this,"Unable to contact server",Toast.LENGTH_LONG).show();

                        }
                    });
                    return null;
                }
            }
            catch (JSONException e)
            {
                e.printStackTrace();
            }
            return null;
        }
        protected void onPostExecute(String file_url)
        {
            pDialog.dismiss();
        }
    }
}





package org.webapp.servlets;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.json.JSONException;
import org.json.JSONObject;
import org.webapp.engine.users;

public class loginservlet extends HttpServlet implements Servlet {
	private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public loginservlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.getWriter().append("Served at: ").append(request.getContextPath());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
	{
		PrintWriter out = response.getWriter();
		JSONObject json=new JSONObject();
		try
		{
			//response.setContentType("application/json");
			response.setContentType("text/html");

			String username,password;
			username=request.getParameter("username");
			password=request.getParameter("password");

			users u=new users();
			u.init();
			if(u.opencon())
			{

				if(u.validate(username, password))
				{
					json.put("result", 1);
				}
				else
				{
					json.put("result", 2);
				}
			}
			else
			{
				json.put("result", 2);
			}
		}
		catch(JSONException e)
		{

		}
		out.flush();
		out.print(json);
	}

}