/assets/addons/cart/addon.php

<?php

/*

	Cart v0.1

	---------------------------------------------------------------------------

	Author:		Giel Berkers

	Website:	www.gielberkers.com

	---------------------------------------------------------------------------

	This addon makes use of Code Igniters Cart-library to create a simple

	shopping cart addon.

	

	Usage:

	

	To add a product to the cart, use a form with certain hidden fields:

	

	<form method="post" action="">

		Quantity: <input name="cart[qty]" type="text" value="1" size="3" />		

		<input type="hidden" name="cart[id]" value="{$idContent}" />

		<!-- $name and $price could be fields of your dataobject: -->

		<input type="hidden" name="cart[name]" value="{$name}" />

		<input type="hidden" name="cart[price]" value="{$price}" />

		<input type="submit" name="cart[add]" value="Add to cart" />

		<!-- Add specific product options like this: -->

		<input type="hidden" name="cart[options][code]" value="{$code}" />

		<select name="cart[options][size]">

			<option value="S">Small</option>

			<option value="M">Medium</option>

			<option value="L">Large</option>

		</select>

	</form>

	

	To destroy (empty) your cart you can use a form:

	

	<form method="post" action="">

		<input type="submit" name="cart[destroy]" value="Empty cart" />	

	</form>

	

	Or a function:

	

	{$cart->destroy()}

	

	Other functions:

	

	{$cart->totalItems()}		Returns the total amount of items in your cart

	{$cart->total()}			Returns the total amount of your cart

	{$cart->getCart()}			Gets the content of your cart

	

*/



class Cart extends AddonBaseModel

{

	var $cart;

	var $email;

	

	/**

	 * Initialize

	 */

	function init()

	{

		@session_start();

		$this->frontEnd = true;

	}

	

	/**

	 * This function tells Three CMS on which hook a function needs to be called

	 */

	function getHooks()

	{

		// Since this addon only does something on the frontend, there are no hooks:

		$hooks = array(

			array(

				'hook'=>'LoadPage',

				'callback'=>'loadUtilities'

			),

			array(

				'hook'=>'PreRenderPage',

				'callback'=>'preRender'

			)

		);

		return $hooks;

	}

	

	// Load the Code Igniter shopping cart and stuff:

	function loadUtilities($context)

	{

		// Load the CI-cart library:

		$context['page']->load->library('cart');

		// Make a reference to the cart-object, since it will not be automaticly

		// coupled this this Addon-Object:

		$this->cart = $context['page']->cart;

		

		// Do the same for the e-mail class:

		$context['page']->load->library('email');

		$this->email = $context['page']->email;

	}

	

	// Check for POST-data

	function preRender($context)

	{

		if(isset($_POST['cart'])) {

			$data = $this->input->post('cart');

			if(isset($data['add'])) {

				// Add product to the cart:

				// Check if the item already exists, if so, perform an update:

				$update = false;

				foreach($this->cart->contents() as $row) {

					if($row['id']==$data['id']) {

						$update = true;

						$this->cart->update(array('rowid'=>$row['rowid'], 'qty'=>$row['qty'] + $data['qty']));

					}

				}

				if(!$update) {

					// No update performed, insert as a new item:

					$this->cart->insert($data);

				}

			} elseif(isset($data['update'])) {

				// Update cart	

				if(isset($_POST['cart']['update_qty'])) {

					foreach($_POST['cart']['update_qty'] as $rowid=>$value) {						

						$this->cart->update(array('rowid'=>$rowid, 'qty'=>$value));

					}

				}

			} elseif(isset($data['remove'])) {

				// Remove from cart

				if(isset($_POST['cart']['remove_id'])) {

					foreach($_POST['cart']['remove_id'] as $rowid=>$value) {						

						$this->cart->update(array('rowid'=>$rowid, 'qty'=>0));

					}

				}

			} elseif(isset($data['destroy'])) {

				// Destroy (empty) the cart:

				$this->destroy();

			} elseif(isset($data['order_complete'])) {				

				$this->complete($data);

			}

			

		}

	}

	

	

	

	//// Frontend functions:

	

	/**

	 * Get the shopping cart

	 * @return	array	A 2-dimensional array with the content of the shopping cart

	 */

	function getCart()

	{

		return $this->cart->contents();

	}

	

	/**

	 * Get the total amount of products in the cart:

	 * @return	int		The total amount products

	 */

	function totalItems()

	{

		$quantity = 0;

		foreach($this->getCart() as $item) {

			$quantity += $item['qty'];

		}

		return $quantity;

	}

	

	/**

	 * Get the total amount of the cart:

	 * @return	number	The total amount of the cart

	 */

	function total()

	{

		return $this->cart->total();

	}

	

	/**

	 * Destroy (empty) your cart:

	 */

	function destroy()

	{

		$this->cart->destroy();

	}

	

	/**

	 * Complete the order:

	 */

	function complete($data)

	{

		if(isset($data['order_type'])) {

			switch($data['order_type']) {

				case 'email' :

					{						

						// Send an e-mail to a user:

						if(isset($data['order_recipient'])) {

							$this->db->select('email');

							$this->db->where('username', $data['order_recipient']);

							$query = $this->db->get('users');

							if($query->num_rows==1) {

								$result = $query->result();								

								$email_address = $result[0]->email;

								$cart  = $this->getCart();

								$clientDetails = $data['client'];

								// Create message:

								ob_start();

								include('email.tpl');

								$content = ob_get_clean();

								

								// Load Configuration:

								// $cartConfig = array();

								include('cart_config.php');

								$this->email->initialize($cartConfig);

								

								// Send HTML mail:

								$this->email->from($cartConfig['from']);

								$this->email->to($email_address);

								$this->email->subject($cartConfig['subject']);

								$this->email->message($content);								

								$ok = $this->email->send();

							}

							die();

						}

						break;					

					}

			}

		}

	}

}

?>