Matt's Software Blog

ANU green news page

Editor screen for ANU green

This was my first experiment in Domain Driven Development. The entire user interaction model was modeled in xtUML (iUMLlite was the IDE) and the code was translated by hand to the PHP code at the rate of over 1000 lines of code per day.

Development statistics;

• Requirements – 7 days
• Design -3 days
• Development – 3 days
• ~3000 lines of PHP code
• ~ 300 lines of MySQL

Running sites;

• http://heritage.anu.edu.au/
• http://www.anu.edu.au/anugreen/
• http://facilities.anu.edu.au/

A few details on how I implemented state machines in PHP

Signal handling

switch ($_SESSION['state']) {
     case 'Main':
          if ($_POST['signal']=='attributes') {$_SESSION['state']='Attributes';}
     break;

     case 'Attributes':
          if ($_POST['signal']=='add_attribute') {$_SESSION['state']='AddAttribute';}
          if ($_POST['signal']=='delete_attribute') {$_SESSION['state']='DeleteAttribute';}
          if ($_POST['signal']=='cancel_attribute') {$_SESSION['state']='Main';}
          if ($_POST['signal']=='strip_clean') {$_SESSION['state']='StripClean';}
          if ($_POST['signal']=='resize_images') {$_SESSION['state']='ResizeImages';}
          if ($_POST['signal']=='includes_attribute') {$_SESSION['state']='IncludesAttribute';}
     break;

     case 'AddAttribute': break;
     case 'DeleteAttribute': break;
     case 'StripClean': break;

     case 'ResizeImages':
          if ($_POST['signal']=='cancel') {$_SESSION['state']='Main';}
     break;

     case 'IncludesAttribute':
          if ($_POST['signal']=='exit') {$_SESSION['state']='Main';}
     break;

     default : $_SESSION['state']='Main';
     break;

}

Body

	case 'ViewPage':
		if (isset($_POST['attribute_Item_ID'])) {
			$attribute_Item_ID = $_POST['attribute_Item_ID'];
		} else {
			if (isset($_SESSION['attribute_Item_ID'])) {
				$attribute_Item_ID = $_SESSION['attribute_Item_ID'];
				unset ($_SESSION['attribute_Item_ID']);
			}
		}
		$url_page_id=$attribute_Item_ID;
		$Attributes[] = array('name' => 'Item_ID', 'value' => $attribute_Item_ID);
		$webpage = getPage($site_prefix, $attribute_Item_ID);
		$Attributes[] = array('name' => 'State', 'value' => $webpage['State']);
		$Attributes[] = array('name' => 'Parent_ID', 'value' => $webpage['Parent_ID']);
		$row[] = buildForm($site_IconDir, 'Back', 'cancel');
		$row[] = buildAttributeForm($site_IconDir, 'Edit', 'edit_page',$Attributes);
		$webpage['Content'] = buildHorozontalTable($row).$webpage['Content'];
		unset($Attributes);
	break;