<?php
require_once dirname( __FILE__ ) . "/../model.php";

/**
 * Simple domain controller/facade that hides the hole complexity.
 *
 * @author Manuel Pichler <mapi@manuel-pichler.de>
 */
class mpDomainFacade
{
    /**
     * Adds a new product for the given name.
     *
     * @param string $productName
     * @throws mpDomainException
     */
    public function addProduct( $productName )
    {
        // Create a new product
        $product = new mpProduct( $productName );

        // Get the product catalog
        $catalog = mpProductCatalog::getInstance();
        // Create a new transaction
        $transaction = $catalog->createTransaction( $product );

        try
        {
            // Start transaction
            $transaction->begin();
            // Add new product to catalog
            $catalog->addProduct( $product );
            // Commit product transaction
            $transaction->commit();
        }
        catch ( mpProductInTransactionException $e )
        {
            throw new mpDomainException( "Transaction Error", $e->getMessage() );
        }
        catch ( mpProductExistsException $e )
        {
            try
            {
                // Rollback product transaction
                $transaction->rollback();
                // Show error message
                throw new mpDomainException( "Name Error", $e->getMessage() );
            }
            catch ( mpProductTransactionNotOpenException $e )
            {
                // Show error message
                throw new mpDomainException( "Transaction Error", $e->getMessage() );
            }
        }
    }
}

/**
 * Exception
 *
 * @author Manuel Pichler <mapi@manuel-pichler.de>
 */
class mpDomainException extends RuntimeException
{
    /**
     * The exception title.
     *
     * @type string
     * @var string $title
     */
    private $title = "";

    /**
     * The exception ctor.
     *
     * @param string $title
     * @param string $message
     */
    public function __construct( $title, $message )
    {
        parent::__construct( $message );

        $this->title = $title;
    }

    /**
     * Returns the exception title.
     *
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    }
}