api/services/nginx/app/objects/order_items_o.php

<?php

namespace objects;

use classes\db;
use classes\object_property;
use traits\db_object_t;

class order_items_o extends db
{
    use db_object_t;

    /**
     * The associated order id
     * @var object_property
     */
    public object_property $order_id;
    /**
     * The associated product id
     * @var object_property
     */
    public object_property $product_id;
    /**
     * The text reference assigned to the product at the time of the order
     * @var object_property
     */
    public object_property $reference;
    /**
     * The notes added to the order item
     * @var object_property
     */
    public object_property $notes;
    /**
     * The cashier (id) who added the item to the order
     * @var object_property
     */
    public object_property $cashier_id;
    /**
     * The price of the product at the time of the order
     * @var object_property
     */
    public object_property $price;
    /**
     * The quantity of the product ordered
     * @var object_property
     */
    public object_property $quantity;
    /**
     * The id of the related item, if it exists
     * @var object_property
     */
    public object_property $related_item_id;

    public function structure(): void
    {
        $this->setTable('order_items');
    }

    public function objectChanged(): void
    {
        // No need to invalidate the cache, since the order_items object is not cached
    }

    public function getOrderItemById(int $id): order_items_o
    {
        global $db;
        // Get the record from the database
        $sql = "SELECT * FROM $this->table WHERE id = $id";
        $result = $db->query($sql);
        if ($result->num_rows > 0) {
            $this->id = $id;
            $this->getObjectProperties();
        }
        return $this;
    }

    public function getObjectProperties(): void
    {
        $this->order_id = new object_property($this->table, $this->id, 'order_id', 'int', true);
        $this->product_id = new object_property($this->table, $this->id, 'product_id', 'int', true);
        $this->reference = new object_property($this->table, $this->id, 'reference', 'string', true);
        $this->notes = new object_property($this->table, $this->id, 'notes', 'string', false);
        $this->cashier_id = new object_property($this->table, $this->id, 'cashier_id', 'int', true);
        $this->price = new object_property($this->table, $this->id, 'price', 'int', true);
        $this->quantity = new object_property($this->table, $this->id, 'quantity', 'int', true);
        $this->related_item_id = new object_property($this->table, $this->id, 'related_item_id', 'int', false);
    }

    public function add(int $order_id, int $product_id, string $reference, string $notes, int $cashier_id, int $price, int $quantity): void
    {
        global $db, $response;
        try {
            // Avoid SQL injection
            $reference = $db->escape_string($reference);
            $notes = $db->escape_string($notes);
            // Create a new record in the database
            $sql = "INSERT INTO $this->table (order_id, product_id, reference, notes, cashier_id, price, quantity) VALUES ($order_id, $product_id, '$reference', '$notes', $cashier_id, $price, $quantity)";
            $db->query($sql);

            // Get the id of the new record
            $this->id = $db->insert_id();

            // Set the values of the object properties
            $this->getObjectProperties();
        } catch (\Exception $e) {
            $response->error($e->getMessage());
        }
    }

    public function edit(int $id, int $order_id, int $product_id, string $reference, string $notes, int $cashier_id, int $price, int $quantity): void
    {
        global $db, $response;
        $this->id = $id;
        try {
            // Avoid SQL injection
            $reference = $db->escape_string($reference);
            $notes = $db->escape_string($notes);
            // Update the record in the database
            $sql = "UPDATE $this->table SET order_id = $order_id, product_id = $product_id, reference = '$reference', notes = '$notes', cashier_id = $cashier_id, price = $price, quantity = $quantity WHERE id = $this->id";
            $db->query($sql);

            // Set the values of the object properties
            $this->getObjectProperties();
        } catch (\Exception $e) {
            $response->error($e->getMessage());
        }
    }

    public function addItemToOrder(int $order_id, int $product_id, int $cashier_id, int $quantity, $related_item_id = null): void
    {
        global $db, $response;
        try {
            // Get the order
            $order = (new orders_o())->getOrderById($order_id);
            // Get the product price
            $price = (new products_o())->getProductById($product_id)->getDepartmentPrice((int)$order->department_id->value());

            // Check if the user has a discount on the product, or category
            $customer = (new orders_o())->getOrderCustomer($order_id);
            $discount = $customer->getCustomPrice($product_id, false);
            if ($discount) {
                $price = $price - ($price * $discount / 100);
            }

            // Create a new record in the database
            $sql = "INSERT INTO $this->table (order_id, product_id, price, cashier_id, quantity) VALUES ($order_id, $product_id, $price, $cashier_id, $quantity)";
            $db->query($sql);
            // Get the id of the new record
            $this->id = $db->insert_id();
            // Set the values of the object properties
            $this->getObjectProperties();
            // Set the related item id, if it is set
            if ($related_item_id) {
                $this->related_item_id->set($related_item_id);
            }

        } catch (\Exception $e) {
            $response->error($e->getMessage());
        }
    }


    public function removeOrderItem(int $id): void
    {
        // TODO: Implement delete() method instead
        global $db;
        $this->id = $id;
        $sql = "DELETE FROM $this->table WHERE id = $this->id or related_item_id = $this->id";
        $db->query($sql);
    }

    public function getItemAsArray(): array
    {
        return [
            'id' => (int)$this->id,
            'order_id' => (int)$this->order_id->value(),
            'product_id' => (int)$this->product_id->value(),
            'reference' => (string)$this->reference->value(),
            'notes' => (string)$this->notes->value(),
            'cashier_id' => (int)$this->cashier_id->value(),
            'price' => (int)$this->price->value(),
            'quantity' => (int)$this->quantity->value(),
            'related_item_id' => (int)$this->related_item_id->value(),
            'product' => (array)(new products_o())->getProductById($this->product_id->value())->asArray(),
            'cashier' => (array)(new users_o())->getUserById($this->cashier_id->value())->asArray()
        ];
    }

    public function getAllItemsAsArray(int $orderId): array
    {
        global $db;
        $sql = "SELECT * FROM $this->table WHERE order_id = $orderId AND deleted_at IS NULL";
        $result = $db->query($sql);
        // Circumvent the repeated instantiation of the object, by just selecting the fields
        $items = [];
        if ($result->num_rows > 0) {
            while ($row = $result->fetch_assoc()) {
                $items[] = $row;
            }
        }
        return $items;
    }

    public function updateOrderItem(int $id, int $price, string $notes, string $reference, int $quantity): void
    {
        global $db, $response;
        $this->id = $id;
        try {
            // Avoid SQL injection
            $price = $db->escape_string($price);
            $notes = $db->escape_string($notes);
            $reference = $db->escape_string($reference);
            // Update the record in the database
            $sql = "UPDATE $this->table SET price = $price, notes = '$notes', reference = '$reference', quantity = $quantity WHERE id = $this->id";
            $db->query($sql);
            // Set the values of the object properties
            $this->getObjectProperties();
        } catch (\Exception $e) {
            $response->error($e->getMessage());
        }
    }
}