source: other-projects/tipple-android/trunk/src/org/greenstone/android/tipple/TippleLog.java@ 23977

package org.greenstone.android.tipple;

import java.io.File;
import java.io.PrintStream;
import java.text.DecimalFormat;
import java.util.Calendar;
import java.util.Date;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.location.Location;

public class TippleLog 
{
    protected Activity activity_;
    protected String log_directory_;
    
    public PrintStream TIPLOG = null;
    protected boolean logging_enabled_ = false;
    protected File    logging_file_;
    protected String  logging_filename_final_;

    
    public TippleLog(Activity activity, String logDirectory) 
    {
        activity_ = activity;
        log_directory_ = logDirectory;
        
        boolean logfile_ok = initLogging();
        alertLogging(logfile_ok);
    }
    
    protected void optStartLog()
    {
        if (TIPLOG!=null) {
               TIPLOG.println("<Log>");
        }
    }
    
    protected void optStopLog()
    {
        if (TIPLOG != null) {
               TIPLOG.println("</Log>");
               
               TIPLOG.close();
               
               
               File logging_file_final = new File(logging_filename_final_);
               logging_file_.renameTo(logging_file_final);
               
              
        }
    }
    
    public void optMessage(String action, String message_line)
    {
        if (logging_enabled_) {
            
            TIPLOG.println("  <LogEntry>");
            
            final long timestamp = System.currentTimeMillis();
            final Calendar cal = Calendar.getInstance();
            cal.setTimeInMillis(timestamp);
            Date date = cal.getTime();
            int hour = date.getHours();
            int minute = date.getMinutes();
            int seconds = date.getSeconds();
            
            TIPLOG.println("    <Timestamp>"+timestamp+"</Timestamp>");
            TIPLOG.println("    <Time>" + hour + ":" + minute + ":" + seconds + "</Time>");
            
            Location loc = TippleLocationListener.lastKnownLocation;
            if (loc!=null) {
                double longitude = loc.getLongitude();
                double latitude  = loc.getLatitude();
                double accuracy  = loc.getAccuracy();
                TIPLOG.println("    <Longitude>"+longitude+"</Longitude>");
                TIPLOG.println("    <Latitude>"+latitude+"</Latitude>");
                TIPLOG.println("    <Accuracy>"+accuracy+"</Accuracy>");
            }
            TIPLOG.println("    <Action>"+action+"</Action>");
            if (message_line != "") {
                TIPLOG.println("    <Message>"+message_line+"</Message>");
            }
            TIPLOG.println("  </LogEntry>");
        }
    }
    
    public void optMessage(String action)
    {
        optMessage(action,"");
    }
    

     DialogInterface.OnClickListener contEnableCallback = new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            logging_enabled_ = true;
            dialog.cancel();
            //dialog.notifyAll();
        }
    };
    
    DialogInterface.OnClickListener contDisableCallback = new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            
            // Delete logging file, then allow application to proceed 
            logging_file_.delete();
            logging_file_ = null;
            TIPLOG = null;
            
            logging_enabled_ = false;
            
            //SharedPreferences.Editor editor = activity_.sharedPreferences.edit();
            //editor.putBoolean("showUserTrail", false);
            //editor.commit();
            
            dialog.cancel();
        }
     };
     
    DialogInterface.OnClickListener stopCallback = new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            
            // Delete logging file, then finish application
            
            logging_file_.delete();
            logging_file_ = null;
            TIPLOG = null;
            
            logging_enabled_ = false;
            
            activity_.finish();
        }
    };
    
    protected boolean initLogging()
    {
         boolean logfile_ok = false;
        
        try {
            
            for (int i=1; i<1000; i++) {
                
                DecimalFormat zeroFill = new DecimalFormat("000");
                String formatted_i = zeroFill.format(i);
                
                File potential_log_file = new File(log_directory_,"UserInteract-" + formatted_i + ".log");
                
                if (potential_log_file.exists()) { continue; }
                
                logging_file_ = new File(log_directory_,"UserInteract-" + formatted_i);
                logging_filename_final_ = logging_file_.getAbsolutePath() + ".log";
                
                TIPLOG = new PrintStream(logging_file_);
                if (TIPLOG != null) {
                    logfile_ok = true;
                    break;
                }
            }
        }
        catch (Exception e) {
         logging_file_ = null;
             e.printStackTrace();      
        }
        
        return logfile_ok;
    }
    
    protected void alertLogging(boolean logfile_ok)
    {           
            AlertDialog.Builder confirm_log_alert = new AlertDialog.Builder(activity_);
            
            if (logfile_ok) {
                confirm_log_alert.setTitle("Logging Activity");
                confirm_log_alert.setMessage("Tipple can log your user interaction.  Do you want this activated?");
                confirm_log_alert.setPositiveButton(R.string.logging_ok_enable,contEnableCallback);
                confirm_log_alert.setNegativeButton(R.string.logging_ok_disable,contDisableCallback);   
            }
            else {
                confirm_log_alert.setTitle("Error");
                confirm_log_alert.setMessage("Failed to initialize user activity log file");
                confirm_log_alert.setPositiveButton(R.string.logging_error_continue,contDisableCallback);
                confirm_log_alert.setNegativeButton(R.string.logging_error_stop,stopCallback);      
            }
            
            confirm_log_alert.show();
    }
}