/android/import-contacts

package org.waxworlds.importcontacts;

import java.util.Stack;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

public class ImportContacts extends Activity

{

	public static final int STATE_NONE = 0;

	public static final int STATE_IMPORT_VCF = 1;

	public static final int STATE_MERGE = 2;

	public static final int STATE_DOIT = 3;

	private Stack< Integer > _stateStack;

	/** Called when the activity is first created. */

	@Override

    public void onCreate(Bundle savedInstanceState)

    {

		super.onCreate(savedInstanceState);

		_stateStack = new Stack< Integer >();

		startState( STATE_IMPORT_VCF );

    }

	@Override

	protected void onActivityResult(int requestCode, int resultCode, Intent data)

	{

		super.onActivityResult(requestCode, resultCode, data);

		// quit?

		if( resultCode == RESULT_CANCELED ) {

			finish();

		}

		else {

			int newState = STATE_NONE;

			if( data != null ) {

				Bundle extras = data.getExtras();

				if( extras != null ) {

					Integer tmp = extras.getInt( "nextstate" );

					if( tmp != null ) {

						newState = tmp.intValue();

					}

				}

			}

			startState( newState );

		}

	}

	private void startState( int newState )

	{

		if( newState == STATE_NONE )

		{

			// we're going back, so pop top state off stack

			_stateStack.pop();

			newState = ( (Integer)_stateStack.peek() ).intValue();

		}

		else

		{

			// push new state on state

			_stateStack.push( new Integer( newState ) );

		}

		// figure out the class

		Class cls = null;

		switch( newState ) {

		case STATE_IMPORT_VCF: cls = ImportVCF.class; break;

		case STATE_MERGE: cls = Merge.class; break;

		case STATE_DOIT: cls = Doit.class; break;

		}

		// start activity

		Intent i = new Intent( this, cls );

		if( _stateStack.size() > 1 ) i.putExtra( "backstate", true );

		startActivityForResult( i, 0 );

	}

}