A simple shopping cart implementation for Laravel
PHP
Latest commit 3ec0cef Nov 2, 2016 @Crinsane committed on GitHub Merge pull request #242 from sweet-greg/master
return row on update

README.md

LaravelShoppingcart

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A simple shoppingcart implementation for Laravel.

Installation

Install the package through Composer.

Run the Composer require command from the Terminal:

composer require gloudemans/shoppingcart

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

Add a new line to the providers array:

Gloudemans\Shoppingcart\ShoppingcartServiceProvider::class

And optionally add a new line to the aliases array:

'Cart' => Gloudemans\Shoppingcart\Facades\Cart::class,

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

As of version 2 of this package it's possibly to use dependency injection to inject an instance of the Cart class into your controller or other class

Overview

Look at one of the following topics to learn more about LaravelShoppingcart

Usage

The shoppingcart gives you the following methods to use:

Cart::add()

Adding an item to the cart is really simple, you just use the add() method, which accepts a variety of parameters.

In its most basic form you can specify the id, name, quantity, price of the product you'd like to add to the cart.

Cart::add('293ad', 'Product 1', 1, 9.99);

As an optional fifth parameter you can pass it options, so you can add multiple items with the same id, but with (for instance) a different size.

Cart::add('293ad', 'Product 1', 1, 9.99, ['size' => 'large']);

The add() method will return an CartItem instance of the item you just added to the cart.

Maybe you prefer to add the item using an array? As long as the array contains the required keys, you can pass it to the method. The options key is optional.

Cart::add(['id' => '293ad', 'name' => 'Product 1', 'qty' => 1, 'price' => 9.99, 'options' => ['size' => 'large']]);

New in version 2 of the package is the possibility to work with the Buyable interface. The way this works is that you have a model implement the Buyable interface, which will make you implement a few methods so the package knows how to get the id, name and price from your model. This way you can just pass the add() method a model and the quantity and it will automatically add it to the cart.

As an added bonus it will automatically associate the model with the CartItem

Cart::add($product, 1, ['size' => 'large']);

As an optional third parameter you can add options.

Cart::add($product, 1, ['size' => 'large']);

Finally, you can also add multipe items to the cart at once. You can just pass the add() method an array of arrays, or an array of Buyables and they will be added to the cart.

When adding multiple items to the cart, the add() method will return an array of CartItems.

Cart::add([
  ['id' => '293ad', 'name' => 'Product 1', 'qty' => 1, 'price' => 10.00],
  ['id' => '4832k', 'name' => 'Product 2', 'qty' => 1, 'price' => 10.00, 'options' => ['size' => 'large']]
]);

Cart::add([$product1, $product2]);

Cart::update()

To update an item in the cart, you'll first need the rowId of the item. Next you can use the update() method to update it.

If you simply want to update the quantity, you'll pass the update method the rowId and the new quantity:

$rowId = 'da39a3ee5e6b4b0d3255bfef95601890afd80709';

Cart::update($rowId, 2); // Will update the quantity

If you want to update more attributes of the item, you can either pass the update method an array or a Buyable as the second parameter. This way you can update all information of the item with the given rowId.

Cart::update($rowId, ['name' => 'Product 1']); // Will update the name

Cart::update($rowId, $product); // Will update the id, name and price

Cart::remove()

To remove an item for the cart, you'll again need the rowId. This rowId you simply pass to the remove() method and it will remove the item from the cart.

$rowId = 'da39a3ee5e6b4b0d3255bfef95601890afd80709';

Cart::remove($rowId);

Cart::get()

If you want to get an item from the cart using its rowId, you can simply call the get() method on the cart and pass it the rowId.

$rowId = 'da39a3ee5e6b4b0d3255bfef95601890afd80709';

Cart::get($rowId);

Cart::content()

Of course you also want to get the carts content. This is where you'll use the content method. This method will return a Collection of CartItems which you can iterate over and show the content to your customers.

Cart::content();

This method will return the content of the current cart instance, if you want the content of another instance, simply chain the calls.

Cart::instance('wishlist')->content();

Cart::destroy()

If you want to completely remove the content of a cart, you can call the destroy method on the cart. This will remove all CartItems from the cart for the current cart instance.

Cart::destroy();

Cart::total()

The total() method can be used to get the calculated total of all items in the cart, given there price and quantity.

Cart::total();

The method will automatically format the result, which you can tweak using the three optional parameters

Cart::total($decimals, $decimalSeperator, $thousandSeperator);

You can set the default number format in the config file.

If you're not using the Facade, but use dependency injection in your (for instance) Controller, you can also simply get the total property $cart->total

Cart::tax()

The tax() method can be used to get the calculated amount of tax for all items in the cart, given there price and quantity.

Cart::tax();

The method will automatically format the result, which you can tweak using the three optional parameters

Cart::tax($decimals, $decimalSeperator, $thousandSeperator);

You can set the default number format in the config file.

If you're not using the Facade, but use dependency injection in your (for instance) Controller, you can also simply get the tax property $cart->tax

Cart::subtotal()

The subtotal() method can be used to get the total of all items in the cart, minus the total amount of tax.

Cart::subtotal();

The method will automatically format the result, which you can tweak using the three optional parameters

Cart::subtotal($decimals, $decimalSeperator, $thousandSeperator);

You can set the default number format in the config file.

If you're not using the Facade, but use dependency injection in your (for instance) Controller, you can also simply get the subtotal property $cart->subtotal

Cart::count()

If you want to know how many items there are in your cart, you can use the count() method. This method will return the total number of items in the cart. So if you've added 2 books and 1 shirt, it will return 3 items.

Cart::count();

Cart::search()

To find an item in the cart, you can use the search() method.

This method was changed on version 2

Behind the scenes, the method simply uses the search method of the Laravel Collection class. This means you must pass it a Closure in which you'll specify you search terms.

If you for instance want to find all items with an id of 1:

$cart->search(function ($cartItem, $rowId) {
    return $cartItem->id === 1;
});

As you can see the Closure will receive two parameters. The first is the CartItem to perform the check against. The second parameter is the rowId of this CartItem.

The method will return a Collection containing all CartItems that where found

This way of searching gives you total control over the search process and gives you the ability to create very precise and specific searches.

Collections

On multiple instances the Cart will return to you a Collection. This is just a simple Laravel Collection, so all methods you can call on a Laravel Collection are also available on the result.

As an example, you can quicky get the number of unique products in a cart:

Cart::content()->count();

Or you can group the content by the id of the products:

Cart::content()->groupBy('id');

Instances

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

You can set the current instance of the cart by calling Cart::instance('newInstance'). From this moment, the active instance of the cart will be newInstance, so when you add, remove or get the content of the cart, you're 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, ['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 default, so when you're not using instances,Cart::content(); is the same as Cart::instance('default')->content().

Models

Because it can be very convenient to be able to directly access a model from a CartItem is it possible to associate a model with the items in the cart. Let's say you have a Product model in your application. With the 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 CartItem!

The model can be accessed via the model property on the CartItem.

If your model implements the Buyable interface and you used your model to add the item to the cart, it will associate automatically.

Here is an example:


// First we'll add the item to the cart.
$cartItem = Cart::add('293ad', 'Product 1', 1, 9.99, ['size' => 'large']);

// Next we associate a model with the item.
Cart::associate($cartItem->rowId, 'Product');

// Or even easier, call the associate method on the CartItem!
$cartItem->associate('Product');

// You can even make it a one-liner
Cart::add('293ad', 'Product 1', 1, 9.99, ['size' => 'large'])->associate('Product');

// Now, when iterating over the content of the cart, you can access the model.
foreach(Cart::content() as $row) {
    echo 'You have ' . $row->qty . ' items of ' . $row->model->name . ' with description: "' . $row->model->description . '" in your cart.';
}

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
CartAlreadyStoredException When trying to store a cart that was already stored using the specified identifier
InvalidRowIDException When the rowId that got passed doesn't exists in the current cart instance
UnknownModelException When you try to associate an none existing model to a CartItem.

Events

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

Event Fired Parameter
cart.add When an item was added to the cart. The CartItem that was added.
cart.update When an item in the cart was updated. The CartItem that was updated.
cart.remove When an item is removed from the cart. The CartItem that was removed.
cart.stored When the content of a cart was stored. -
cart.restored When the content of a cart was restored. -

Example

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


// Add some items in your Controller.
Cart::add('192ao12', 'Product 1', 1, 9.99);
Cart::add('1239ad0', 'Product 2', 2, 5.95, ['size' => 'large']);

// Display the content in a View.
<table>
    <thead>
        <tr>
            <th>Product</th>
            <th>Qty</th>
            <th>Price</th>
            <th>Subtotal</th>
        </tr>
    </thead>

    <tbody>

        <?php foreach(Cart::content() 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->total; ?></td>
            </tr>

        <?php endforeach;?>

    </tbody>

    <tfoot>
        <tr>
            <td colspan="2">&nbsp;</td>
            <td>Subtotal</td>
            <td><?php echo Cart::subtotal(); ?></td>
        </tr>
        <tr>
            <td colspan="2">&nbsp;</td>
            <td>Tax</td>
            <td><?php echo Cart::tax(); ?></td>
        </tr>
        <tr>
            <td colspan="2">&nbsp;</td>
            <td>Total</td>
            <td><?php echo Cart::total(); ?></td>
        </tr>
    </tfoot>
</table>