I'm trying to build an ajax-powered shopping cart in codeigniter, and now I'm facing a problem with how to get the response as a HTML, and encode it as a JSON response, then append the shopping cart page with the response.
Here is the javascript code:
$('.addtocart').on('click', function (event) {
event.preventDefault();
var AddedQty = parseInt($('#attr-quantity').val());
$('#shoppingcart div.cart, #shoppingcart div.loading').remove();
$('#shoppingcart').append('<div class="loading"></div>');
shoppingcart.open();
$.post('/mywebsite/cart/add', {
itemId: $('.addtocart').data('itemId'),
quantity: AddedQty
}, function (response) {
var html = $(response.ShoppingCartHtml).html();
shoppingcart.update(html);
shoppingcart.close();
});
});
And this is the code for the cart controller:
public function add() {
$this->load->model('cart_model');
$id = $this->input->post('itemId');
$qty = $this->input->post('quantity');
$cart = $this->cart->contents();
$exists = false;
$rowid = '';
foreach ($cart as $item) {
if ($item['id'] == $id) {
$exists = true;
$rowid = $item['rowid'];
$qty = $item['qty'] + $qty;
}
}
if ($exists) {
$this->cart_model->update_item($rowid, $qty);
} else {
$this->cart_model->add_cart_item();
}
$this->output->set_content_type('application/json');
$this->output->set_output(json_encode(array('ShoppingCartHtml'=> $theHTMLResponse)));
}
And the code below is the sample code (not the real code) that I want to encode it as the JSON response, as the ShoppingCartHtml:
<li>
<h3><?php echo $ProductName; ?></h3>
</li>
So far, I've tried to echo the view, and encode it using the json_encode, but I get an error. Here is what I've come with:
$theHTMLResponse= echo $this->load->view('pages/minicart.php', $data); //THIS LINE THROWS ERROR (I know that I cannot assign what echo-ed into a variable).
$this->output->set_content_type('application/json');
$this->output->set_output(json_encode(array('ShoppingCartHtml'=> $theHTMLResponse)));
The example of the correct response that we wanted is like the codes below (as shown in Firebug) :
{"MinicartHtml":"\u003cli\u003e\r\n\u003ch3\u003eThe Product Name\u003c/h3\u003e\u003c/li\u003e"}
Which if I inspected in the Firebug console, on the JSON tab, it should shows the ShoppingCartHtml's html codes, enclosed with quotes, as the ShoppingCartHtml JSON Response.
The question is: How can I encode the ShoppingCartHtml's html codes as a JSON response?
PS: My apologize if my question is confusing. English is not my cup of tea. Even to type this question, I need almost 1 hour to complete it. But I hope you guys understand what I asked.
Thank you in advance.