exportemailaddress.java

GPS Track connects to a GPS and records the path that you travel. Tracks can be uploaded to a web s

// J2ME GPS Track
// Copyright (C) 2006 Dana Peters
// http://www.qcontinuum.org/gpstrack

package org.qcontinuum.gpstrack;

import javax.microedition.lcdui.*;

public class ExportEmailAddress extends TextBox implements CommandListener {
    
    private Displayable mParent;
    private String mTrackName;
    private int mFormat;
    private Command mOkCommand, mCancelCommand;

    public ExportEmailAddress(Displayable parent, String trackName, int format) {
        super("Email Address", "", 50, TextField.EMAILADDR);
        mParent = parent;
        mTrackName = trackName;
        mFormat = format;
        Preferences preferences = GpsTrack.getPreferences();
        setString(preferences.getEmailAddress());
        addCommand(mOkCommand = new Command("OK", Command.OK, 0));
        addCommand(mCancelCommand = new Command("Cancel", Command.CANCEL, 0));
        setCommandListener(this);        
    }

    public void commandAction(Command c, Displayable d)  {
        if (c == mOkCommand) {
            Preferences preferences = GpsTrack.getPreferences();
            String emailAddress = getString();
            if (validateEmail(emailAddress)) {
                preferences.setEmailAddress(emailAddress);
                preferences.save();
                GpsTrack.display(new ExportEmailProgress(mParent, mTrackName, mFormat, emailAddress));
            } else {
                GpsTrack.display("Please enter a valid email address.", 3, this);
            }
        } else if (c == mCancelCommand) {
            GpsTrack.display(mParent);
        }
    }

    private boolean validateEmail(String email) {
        String legalChar = "abcdefghijklmnopqrstuvwxyz._-0123456789";
        int state = 0;
        int domainChars = 0;
        String lowerEmail = email.toLowerCase();
        for (int i = 0; i < email.length(); i++) {
            char c = email.charAt(i);
            switch (state) {
                case 0:
                    if (legalChar.indexOf(c) < 0)
                        state = -1;
                    else
                        state = 1;
                    break;
                case 1:
                    if (c == '@')
                        state = 2;
                    else
                        if (legalChar.indexOf(c) < 0)
                            state = -1;
                    break;
                case 2:
                    if (c == '.') {
                        domainChars = 0;
                        state = 3;
                    } else
                        if (legalChar.indexOf(c) < 0)
                            state = -1;
                    break;
                case 3:
                    if (c == '.')
                        domainChars = 0;
                    else {
                        domainChars++;
                        if (legalChar.indexOf(c) < 0)
                            state = -1;
                    }
                    break;
            }
            if (state < 0)
                break;
        }
        return state == 3 && domainChars > 1 && domainChars < 5;
    }

}