README

A simple shoppingcart implementation for Laravel 4.

Installation

Install the package through Composer. Edit your project's composer.json file by adding:

"require": {
	"laravel/framework": "4.1.*",
	"nat_bjorkgard/shopping_cart": "dev-master"
}

Next, run the Composer update command from the Terminal:

composer update

Now all you have to do is add the service provider of the package and alias the package. To do this open your app/config/app.php file.

Add a new line to the service providers array:

'Bjorkgard\Shoppingcart\ShoppingcartServiceProvider'

And finally add a new line to the aliases array:

'Cart'            => 'Bjorkgard\Shoppingcart\Facades\Cart',

Now you're ready to start using the shopping cart in your application.

Overview

Look at one of the following topics to learn more about the Shopping cart

Usage
Collections
Instances
Models
Exceptions
Events
Example

Usage

The shopping cart gives you the following methods to use:

Cart::add()

/**
 * Add a row to the cart
 *
 * @param string|Array $id      Unique ID of the item|Item formatted as array|Array of items
 * @param string       $name    Name of the item
 * @param int          $qty     Item qty to add to the cart
 * @param float        $price   Price of one item
 * @param float        $weight  Weight of one item
 * @param Array        $options Array of additional options, such as 'size' or 'color'
 */

// Basic form
Cart::add('293ad', 'Product 1', 1, 9.99, array('size' => 'large'));

// Array form
Cart::add(array('id' => '293ad', 'name' => 'Product 1', 'qty' => 1, 'price' => 9.99, 'weight' => 250, 'options' => array('size' => 'large')));

// Batch method
Cart::add(array(
  array('id' => '293ad', 'name' => 'Product 1', 'qty' => 1, 'price' => 10.00, 'weight' => 12.5),
  array('id' => '4832k', 'name' => 'Product 2', 'qty' => 1, 'price' => 10.00, 'options' => array('size' => 'large'))
));

Cart::update()

/**
 * Update the quantity of one row of the cart
 *
 * @param  string        $rowId       The row id of the item you want to update
 * @param  integer|Array $attribute   New quantity of the item|Array of attributes to update
 * @return boolean
 */
 $rowId = 'da39a3ee5e6b4b0d3255bfef95601890afd80709';

Cart::update($rowId, 2);

OR

Cart::update($rowId, array('name' => 'Product 1'));

Cart::remove()

/**
 * Remove a row from the cart
 *
 * @param  string  $rowId The row id of the item
 * @return boolean
 */

 $rowId = 'da39a3ee5e6b4b0d3255bfef95601890afd80709';

Cart::remove($rowId);

Cart::get()

/**
 * Get a row of the cart by its ID
 *
 * @param  string $rowId The ID of the row to fetch
 * @return CartRowCollection
 */

$rowId = 'da39a3ee5e6b4b0d3255bfef95601890afd80709';

Cart::get($rowId);

Cart::content()

/**
 * Get the cart content
 *
 * @return CartCollection
 */

Cart::content();

Cart::destroy()

/**
 * Empty the cart
 *
 * @return boolean
 */

Cart::destroy();

Cart::total()

/**
 * Get the price total
 *
 * @return float
 */

Cart::total();

Cart::count()

/**
 * Get the number of items in the cart
 *
 * @param  boolean $totalItems Get all the items (when false, will return the number of rows)
 * @return int
 */

 Cart::count();      // Total items
 Cart::count(false); // Total rows

Cart::search()

/**
 * Search if the cart has a item
 *
 * @param  Array  $search An array with the item ID and optional options
 * @return Array|boolean
 */

 Cart::search(array('id' => 1, 'options' => array('size' => 'L'))); // Returns an array of rowid(s) of found item(s) or false on failure

Collections

As you might have seen, the Cart::content() and Cart::get() methods both return a Collection, a CartCollection and a CartRowCollection.

These Collections extends the 'native' Laravel 4 Collection class, so all methods you know from this class can also be used on your shopping cart. With some addition to easily work with your carts content.

Instances

Now the packages also supports multiple instances of the cart. The way this works is like this:

You can set the current instance of the cart with Cart::instance('newInstance'), at that moment, the active instance of the cart is newInstance, so when you add, remove or get the content of the cart, you work with the newInstance instance of the cart. If you want to switch instances, you just call Cart::instance('otherInstance') again, and you're working with the otherInstance again.

So a little example:

Cart::instance('shopping')->add('192ao12', 'Product 1', 1, 9.99);

// Get the content of the 'shopping' cart
Cart::content();

Cart::instance('wishlist')->add('sdjk922', 'Product 2', 1, 19.95, array('size' => 'medium'));

// Get the content of the 'wishlist' cart
Cart::content();

// If you want to get the content of the 'shopping' cart again...
Cart::instance('shopping')->content();

// And the count of the 'wishlist' cart again
Cart::instance('wishlist')->count();

N.B. Keep in mind that the cart stays in the last set instance for as long as you don't set a different one during script execution.

N.B.2 The default cart instance is called main, so when you're not using instances,Cart::content(); is the same as Cart::instance('main')->content().

Models

A new feature is associating a model with the items in the cart. Let's say you have a Product model in your application. With the new associate() method, you can tell the cart that an item in the cart, is associated to the Product model.

That way you can access your model right from the CartRowCollection!

Here is an example:

<?php 

/**
 * Let say we have a Product model that has a name and description.
 */

Cart::associate('Product')->add('293ad', 'Product 1', 1, 9.99, array('size' => 'large'));


$content = Cart::content();


foreach($content as $row)
{
	echo 'You have ' . $row->qty . ' items of ' . $row->product->name . ' with description: "' . $row->product->description . '" in your cart.';
}

The key to access the model is the same as the model name you associated (lowercase). The associate() method has a second optional parameter for specifying the model namespace.

Exceptions

The Cart package will throw exceptions if something goes wrong. This way it's easier to debug your code using the Cart package or to handle the error based on the type of exceptions. The Cart packages can throw the following exceptions:

Exception	Reason
ShoppingcartInstanceException	When no instance is passed to the instance() method
ShoppingcartInvalidItemException	When a new product misses one of it's arguments (`id`, `name`, `qty`, `price`)
ShoppingcartInvalidPriceException	When a non-numeric price is passed
ShoppingcartInvalidWeightException	When a non-numeric weight is passed
ShoppingcartInvalidQtyException	When a non-numeric quantity is passed
ShoppingcartInvalidRowIDException	When the `$rowId` that got passed doesn't exists in the current cart
ShoppingcartUnknownModelException	When an unknown model is associated to a cart row

Events

The cart also has events build in. There are five events available for you to listen for.

Event	Fired
cart.add($item)	When a single item is added
cart.batch($items)	When a batch of items is added
cart.update($rowId)	When an item in the cart is updated
cart.remove($rowId)	When an item is removed from the cart
cart.destroy()	When the cart is destroyed

Example

Below is a little example of how to list the cart content in a table:

// Controller

Cart::add('192ao12', 'Product 1', 1, 9.99);
Cart::add('1239ad0', 'Product 2', 2, 5.95, array('size' => 'large'));

// View

<table>
   	<thead>
       	<tr>
           	<th>Product</th>
           	<th>Qty</th>
           	<th>Item Price</th>
           	<th>Subtotal</th>
       	</tr>
   	</thead>

   	<tbody>

   	<?php foreach($cart as $row) :?>

       	<tr>
           	<td>
               	<p><strong><?php echo $row->name;?></strong></p>
               	<p><?php echo ($row->options->has('size') ? $row->options->size : '');?></p>
           	</td>
           	<td><input type="text" value="<?php echo $row->qty;?>"></td>
           	<td>$<?php echo $row->price;?></td>
           	<td>$<?php echo $row->subtotal;?></td>
       </tr>

   	<?php endforeach;?>

   	</tbody>
</table>

nat_bjorkgard / shopping_cart

Maintainers

Details