Android Open Source - imperialscrmenu Main Activity

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Back to project page imperialscrmenu.

License

The source code is released under:

GNU General Public License

Java Source Code

/*    
    Copyright (C) 2014 Christian Jacobs.
/* w w  w . ja v a2  s.c o  m*/
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>. 
*/

package ctjacobs.imperialscrmenu;

import java.net.*;
import java.io.*;
import java.util.regex.*;
import java.util.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;

import android.app.Activity;
import android.app.Dialog;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.text.Html;
import android.graphics.Paint;
import android.widget.*;
import android.view.*;
import android.graphics.Color;
import android.graphics.Typeface;

public class MainActivity extends Activity
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        /* Update the title text with the current date. */
        TextView textTitle = (TextView) this.findViewById(R.id.textTitle);
        DateFormat dateFormat = new SimpleDateFormat("EEEE, dd MMM");
        Date date = new Date();
        textTitle.setTextAppearance(this, android.R.style.TextAppearance_Large);
        textTitle.setTypeface(Typeface.SERIF, Typeface.NORMAL);
        textTitle.setText("Menu for " + dateFormat.format(date));
        textTitle.setTextColor(Color.BLACK);
        
        LinearLayout layout = (LinearLayout) this.findViewById(R.id.layoutMain);
        
        /* Add a divider between the title and the menu itself. */
        TextView divider = new TextView(this);
        divider.setGravity(Gravity.CENTER);
        divider.setText("~~~~~~");
        divider.setTextColor(Color.BLUE);
        layout.addView(divider);
            
        /* Retrieve and parse the menu. */
        String menu = (String) this.getMenu();
        
        /* Display the menu to the user. */
        Calendar calendar = Calendar.getInstance();
        int day = calendar.get(Calendar.DAY_OF_WEEK);
        if(day != 1 && day != 7) /* If the current day is not Saturday nor Sunday... */
        {
            List<String> foodChoices = this.parseMenu(menu, day);
            
            for(int i = 0; i < foodChoices.size(); i++) 
            {
                String choice = foodChoices.get(i);
                TextView tv = new TextView(this);
                tv.setPadding(10, 3, 10, 3);
                tv.setGravity(Gravity.CENTER);
                tv.setTextColor(Color.BLACK);
                tv.setTypeface(Typeface.SERIF, Typeface.ITALIC);
                tv.setText(choice);
                layout.addView(tv);
               
                /* Add a divider between each food choice. */
                divider = new TextView(this);
                divider.setGravity(Gravity.CENTER);
                divider.setText("~~~~~~");
                divider.setTextColor(Color.BLUE);
                layout.addView(divider);
            }
            
            if(foodChoices.size() != 0)
            {
                TextView tv = new TextView(this);
                tv.setPadding(10, 3, 10, 3);
                tv.setGravity(Gravity.CENTER);
                tv.setText("V = Suitable for Vegetarians, GF = Gluten Free, NF = Nuts Free, DF = Dairy Free");
                tv.setTextAppearance(this, android.R.style.TextAppearance_Small);
                tv.setTypeface(Typeface.SERIF, Typeface.NORMAL);
                tv.setTextColor(Color.RED);
                layout.addView(tv);
            }
            
            /* Warn the user if the current time is before 10 am. */
            if(isEarly())
            {
                showAlert("You are accessing the menu before 10 am. It might therefore be out-of-date.");
            }
        }
        else
        {
            showAlert("No menu exists for today. The SCR is not open on weekends.");
        }

        return;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        MenuInflater menuInflater = getMenuInflater();
        menuInflater.inflate(R.layout.menu, menu);
        return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        switch (item.getItemId())
        {
           case R.id.menu_about:
               Intent intent = new Intent(getApplicationContext(), AboutDialogActivity.class);
               startActivity(intent);
               return true;
    
           default:
               return super.onOptionsItemSelected(item);
        }
    }    
      
    /** Retrieve the menu from the SCR's webpage. */
    private String getMenu()
    {
        try
        {
            /* Open a connection to the SCR menu's website. */
            URL url = new URL(this.getString(R.string.menu_page_url));
            URLConnection connection = url.openConnection();
            connection.setRequestProperty("User-Agent", "Mozilla/5.0 (compatible)");
            connection.setRequestProperty("Accept", "*/*");
            connection.setDoInput(true);
            connection.setDoOutput(true);
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            
            /* Searches for the portion of the HTML that contains the menu title. */
            String line;
            String menuPageTitle = this.getString(R.string.menu_page_title);
            while((line = reader.readLine()) != null)
            {
                if(line.contains(menuPageTitle))
                {
                    return line.toString();
                }
            }
        }
        catch(RuntimeException e)
        {
            showAlert("Could not obtain the menu from the SCR website. Check Internet connection?");
            e.printStackTrace();
        }
        catch(IOException e)
        {
            showAlert("Could not obtain the menu from the SCR website. An IOException occurred.");
            e.printStackTrace();
        }
        return "";
    }
    
    private List<String> parseMenu(String menu, int day)
    {
        String[] days = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
        
        /** Grab all the food choices from the current day's menu and strip all the HTML tags. */
        String regex = "";
        if(day == 6)
        {
           /* Nothing after Friday, so just read until the end of the page. */
           regex = Pattern.quote(days[day-1]) + "(.*?)$";
        }
        else
        {
           regex = Pattern.quote(days[day-1]) + "(.*?)" + Pattern.quote(days[day]);
        }
        Pattern p = Pattern.compile(regex);
        Matcher m = p.matcher(menu);
        String menuOfTheDay = "";
        List<String> foodChoices = new ArrayList<String>();
        
        /* If m.find() is true, then we are dealing with the old form of the menu (with all days listed). */
        if(m.find()) 
        {
           menuOfTheDay = m.group(1);
        }
        else
        {
           /* This handles the new form of the menu. */
           /* Use the whole string, since it contains the menu only for the current day. */
           menuOfTheDay = menu;
        }
        
        System.out.println(menuOfTheDay);
        /* This assumes that each food choice is presented as a separate bullet point. */
        regex = Pattern.quote("<li>") + "(.*?)" + Pattern.quote("</li>");
        p = Pattern.compile(regex);
        m = p.matcher(menuOfTheDay);
        while(m.find())
        {
           System.out.println(m.group(1));
           foodChoices.add(Html.fromHtml(m.group(1)).toString());
        }
        return foodChoices;
    }
    
    private Boolean isEarly()
    {
        /** Warn the user that the menu might not be up-to-date yet, if it is before 10 am. */
        Calendar present = Calendar.getInstance();
        if(present.get(Calendar.HOUR_OF_DAY) < 10)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    
    private void showAlert(String message)
    {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage(message);
        builder.setPositiveButton("OK",
                                  new DialogInterface.OnClickListener() 
                                  {
                                      @Override
                                      public void onClick(DialogInterface dialog, int which) 
                                      {
                                          dialog.dismiss();
                                      }
                                  });
        AlertDialog dialog = builder.create();
        dialog.show();
        return;
    }
    
}

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