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Merge pull request #1 from tonicospinelli/01-flat-php
guest user adds product at its wishlist
2 parents d5bd1d8 + 800d570 commit 7e8697a

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‎.gitignore‎

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/data/*
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!/data/.gitkeep

‎README.md‎

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Developing for Business
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=======================
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#### User Story
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I as a guest user, I want to add a product sold out in my wish list, so that I receive a notification when it becomes available.
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Eu como um usuário convidado, quero adicionar um produto esgotado em minha lista de desejos para que eu receba uma notificação quando ele estiver disponível.
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#### Requirements
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* PHP 5.6+
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* PDO + SQLite Driver
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#### Run Application
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create sqlite database
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```shell
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$ php cli/create_tables.php
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```
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start php built-in server
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```shell
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$ php -S localhost:8000 -t public
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```

‎cli/create_tables.php‎

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<?php
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require_once __DIR__ . '/../lib/dbconn.php';
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$db->query("CREATE TABLE IF NOT EXISTS wishlists (id INTEGER PRIMARY KEY AUTOINCREMENT, email varchar(255), product_id int, status VARCHAR(1) DEFAULT 'P');");
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$db->query('CREATE TABLE IF NOT EXISTS products (id INTEGER PRIMARY KEY AUTOINCREMENT, name varchar(255), unit_price DECIMAL(10,2), stock int);');
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$stm = $db->query("INSERT INTO products VALUES (null, 'Camiseta', 59.9, 10);");
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$stm = $db->query("INSERT INTO products VALUES (null, 'Bermuda', 69.9, 10);");

‎cli/wishlist_notification.php‎

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<?php
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require_once __DIR__ . '/../lib/functions.php';
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require_once __DIR__ . '/../lib/dbconn.php';
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$query = <<<SQL
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SELECT
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wishlists.id, wishlists.email, products.name as product_name
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FROM
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wishlists
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INNER JOIN
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products ON products.id = product_id
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WHERE
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products.stock > 0
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AND wishlists.status = 'P'
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SQL;
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$stm = $db->prepare($query);
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$stm->execute();
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$wishlists = $stm->fetchAll(PDO::FETCH_ASSOC);
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foreach ($wishlists as $wishlist) {
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echo sprintf(
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'sending email for: %s with "%s".',
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$wishlist['email'],
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$wishlist['product_name']
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) . PHP_EOL;
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$stm = $db->prepare("UPDATE wishlists SET status = 'S' WHERE id = ?");
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$stm->execute([$wishlist['id']]);
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}

‎data/.gitkeep‎

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‎lib/dbconn.php‎

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<?php
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$database = __DIR__ . '/../data/business.db';
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$dsn = 'sqlite:' . $database;
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$db = new PDO($dsn);
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‎lib/functions.php‎

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<?php
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/**
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* validate wish list data
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* @param array $data
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* @return bool
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*/
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function isValidProduct(array $data)
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{
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if (!isset($data['name']) || !assert(is_string($data['name']) !== false)) {
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return false;
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}
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if (!isset($data['stock']) || !assert(is_numeric($data['stock']))) {
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return false;
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}
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return true;
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}
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/**
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* Gets wish list data.
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* @param array $data
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* @return array
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*/
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function getProduct(array $data)
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{
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return array(
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'id' => (isset($data['id']) ? $data['id'] : null),
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'name' => $data['name'],
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'price' => $data['price'],
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'stock' => $data['stock']
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);
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}
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/**
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* Creates a url to remove product from wish list
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* @param int $id
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* @return string
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*/
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function removeUrl($uri, $id, array $extraQuery = array())
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{
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$query = http_build_query(array_merge(['remove' => $id], $extraQuery));
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return sprintf('<a href="/%s?%s">remove</a>', $uri, $query);
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}
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/**
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* validate wish list data
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* @param array $data
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* @return bool
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*/
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function isValidWishList(array $data)
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{
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if (!isset($data['product_id']) || !assert(is_numeric($data['product_id']))) {
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return false;
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}
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if (!isset($data['email']) || !assert(filter_var($data['email'], FILTER_VALIDATE_EMAIL) !== false)) {
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return false;
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}
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return true;
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}
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/**
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* Gets wish list data.
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* @param array $data
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* @return array
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*/
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function getWishList(array $data)
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{
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return array(
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'email' => $data['email'],
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'product_id' => $data['product_id'],
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'status' => 'P',
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);
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}

‎public/product.php‎

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<?php
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require_once __DIR__ . '/../lib/functions.php';
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require_once __DIR__ . '/../lib/dbconn.php';
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$errormsg = null;
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$successmsg = null;
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if (isset($_POST['submit']) && isValidProduct($_POST['product'])) {
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$product = getProduct($_POST['product']);
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$db->beginTransaction();
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try {
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$stm = $db->prepare('INSERT INTO products (name, unit_price, stock) VALUES (?, ?, ?)');
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$stm->execute([$product['name'], $product['unit_price'], $product['stock']]);
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$db->commit();
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$successmsg = 'Product was saved successfully!';
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} catch (Exception $e) {
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$db->rollBack();
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$errormsg = 'Product could not be added! :(';
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}
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}
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$stm = $db->prepare('SELECT * FROM products');
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$stm->execute();
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$products = $stm->fetchAll(PDO::FETCH_ASSOC);
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?>
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<html>
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<head></head>
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<body>
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<?php if (null !== $errormsg): ?>
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<div class="alert error"><?php echo $errormsg; ?> </div>
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<?php elseif (isset($product)): ?>
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<div class="alert success"><?php echo $successmsg; ?></div>
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<?php endif; ?>
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<h3>Products</h3>
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<table>
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<thead>
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<tr>
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<th>ID</th>
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<th>PRODUCT</th>
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<th>UNIT PRICE</th>
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<th>STOCK</th>
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<th>ACTIONS</th>
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</tr>
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</thead>
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<tbody>
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<?php foreach ($products as $product): ?>
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<tr>
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<td><?php echo $product['id']; ?> </td>
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<td><?php echo $product['name']; ?> </td>
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<td><?php echo $product['unit_price']; ?> </td>
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<td><?php echo $product['stock']; ?> </td>
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<td><?php echo removeUrl('product.php', $product['id']); ?> </td>
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</tr>
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<?php endforeach; ?>
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</tbody>
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</table>
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</body>
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</html>

‎public/wishlist.php‎

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<?php
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require_once __DIR__ . '/../lib/functions.php';
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require_once __DIR__ . '/../lib/dbconn.php';
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$errormsg = null;
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$successmsg = null;
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if (isset($_POST['submit']) && isValidWishList($_POST['wish_item'])) {
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$wishItem = getWishList($_POST['wish_item']);
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$db->beginTransaction();
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try {
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$stm = $db->prepare('INSERT INTO wishlists (email, product_id) VALUES (?, ?)');
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$stm->execute([$wishItem['email'], $wishItem['product_id']]);
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$db->commit();
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$successmsg = 'Product was added at wish list successfully!';
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} catch (Exception $e) {
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$db->rollBack();
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$errormsg = 'Product could not be added at wishlist! :(';
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}
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}
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if (isset($_GET['remove'])) {
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$db->beginTransaction();
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try {
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$stm = $db->prepare('DELETE FROM wishlists WHERE id = ?');
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$stm->execute([$_GET['remove']]);
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$db->commit();
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$successmsg = 'Product was removed from wish list successfully!';
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} catch (Exception $e) {
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$db->rollBack();
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$errormsg = 'Product could not be removed at wishlist! :(';
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}
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header('Location: /wishlist.php?'.http_build_query(['email' => $_GET['email']]));
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}
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$query = <<<SQL
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SELECT
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wishlists.id, products.name as product_name, products.stock as product_stock, wishlists.status
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FROM
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wishlists
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INNER JOIN
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products ON products.id = product_id
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WHERE email = ?
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SQL;
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$stm = $db->prepare($query);
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$stm->execute([$_GET['email']]);
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$wishlist = $stm->fetchAll(PDO::FETCH_ASSOC);
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?>
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<html>
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<head></head>
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<body>
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<?php if (null !== $errormsg): ?>
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<div class="alert error"><?php echo $errormsg; ?> </div>
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<?php elseif (isset($wishItem)): ?>
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<div class="alert success"><?php echo $successmsg; ?></div>
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<?php endif; ?>
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<h3>My Wish List</h3>
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<table>
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<thead>
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<tr>
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<th>ID</th>
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<th>PRODUCT</th>
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<th>STATUS</th>
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<th>ACTIONS</th>
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</tr>
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</thead>
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<tbody>
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<?php foreach ($wishlist as $wish): ?>
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<tr>
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<td><?php echo $wish['id']; ?> </td>
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<td><?php echo $wish['product_name']; ?> </td>
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<td><?php echo ($wish['status'] == 'P' && $wish['product_stock'] == 0 ? 'Not Available' : 'Available'); ?> </td>
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<td><?php echo removeUrl('wishlist.php', $wish['id'], ['email' => $_GET['email']]); ?> </td>
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</tr>
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<?php endforeach; ?>
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</tbody>
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</table>
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</body>
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</html>

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