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Comments on How to to make a store tree view cart
Post
How to to make a store tree view cart
I am building an MVC cart system. I have the MERCHANTS table and the PRODUCTS table. A merchant (store) can have one or more products, everything works fine but what I want is to display products by store, I mean say that once a user adds, for example, some products that belong to the same shop, the cart should display like a treeview. I have designed two functions, one that builds the HTML view and the other function which builds the model.
CREATE TABLE `cart` (
`cartId` int(10) UNSIGNED NOT NULL,
`product_id` int(10) UNSIGNED NOT NULL,
`user_id` int(10) UNSIGNED DEFAULT NULL,
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `merchants` (
`merchant_id` int(11) UNSIGNED NOT NULL,
`merchant_name` varchar(255) DEFAULT NULL,
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
CREATE TABLE `products` (
`product_id` int(11) UNSIGNED NOT NULL,
`merchant_id` int(11) UNSIGNED NOT NULL,
`product_name` varchar(255) NOT NULL,
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Model
$userId = 1; // This is just for an example
$itemsInCart= getCart($userId); // Fetch the items in cart from the DB on session
function getCart($userId): array
{
try {
$db = createConnection();
$sql = 'SELECT * FROM cart
LEFT JOIN products p ON cart.product_id = p.product_id
LEFT JOIN merchants m ON p.merchant_id = m.merchant_id
WHERE user_id = :userId ';
$stmt = $db->prepare($sql);
$stmt->bindValue(':userId', $userId, PDO::PARAM_INT);
$stmt->execute();
$invInfo = $stmt->fetchAll(PDO::FETCH_ASSOC);
$stmt->closeCursor();
return $invInfo;
} catch (PDOException $e) {
exit($e->getMessage()) ;
return [];
}
}
View
$userCartDisplay = buildUserCartDisplay($itemsInCart); // Builds the cart elements' view
function buildUserCartDisplay($itemsInCart)
{
$html = '';
foreach($itemsInCart as $cart) {
$html .= '<ul> Store name goes right here';
$html .= '<li> store Products name go right here <li> ';
$html .= '</ul> ';
}
return $html;
}
echo $userCartDisplay; // Display the view
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