feat: initial foundation for collaborative canteen ordering system in vanilla PHP

2026-08-27 17:29:13 +07:00
commit 5effce30cb
52 changed files with 4915 additions and 0 deletions
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use App\Core\Database\Database;
+use PDO;
+
+class Product
+{
+    public static function all(): array
+    {
+        $db = Database::getConnection();
+        $stmt = $db->query("SELECT * FROM products ORDER BY name ASC");
+        return $stmt->fetchAll();
+    }
+
+    public static function find(int $id): ?array
+    {
+        $db = Database::getConnection();
+        $stmt = $db->prepare("SELECT * FROM products WHERE id = ?");
+        $stmt->execute([$id]);
+        $row = $stmt->fetch();
+        return $row ?: null;
+    }
+
+    public static function count(): int
+    {
+        $db = Database::getConnection();
+        return (int)$db->query("SELECT COUNT(*) FROM products")->fetchColumn();
+    }
+
+    public static function lowStockCount(int $threshold = 25): int
+    {
+        $db = Database::getConnection();
+        $stmt = $db->prepare("SELECT COUNT(*) FROM products WHERE stock <= ?");
+        $stmt->execute([$threshold]);
+        return (int)$stmt->fetchColumn();
+    }
+
+    public static function create(array $data): int
+    {
+        $db = Database::getConnection();
+        $stmt = $db->prepare("
+            INSERT INTO products (sku, name, description, price, stock, category) 
+            VALUES (:sku, :name, :description, :price, :stock, :category)
+        ");
+        $stmt->execute([
+            ':sku' => $data['sku'],
+            ':name' => $data['name'],
+            ':description' => $data['description'] ?? '',
+            ':price' => $data['price'],
+            ':stock' => (int)($data['stock'] ?? 0),
+            ':category' => $data['category'] ?? 'General',
+        ]);
+        return (int)$db->lastInsertId();
+    }
+
+    public static function update(int $id, array $data): bool
+    {
+        $db = Database::getConnection();
+        $stmt = $db->prepare("
+            UPDATE products 
+            SET sku = :sku, name = :name, description = :description, 
+                price = :price, stock = :stock, category = :category
+            WHERE id = :id
+        ");
+        return $stmt->execute([
+            ':id' => $id,
+            ':sku' => $data['sku'],
+            ':name' => $data['name'],
+            ':description' => $data['description'] ?? '',
+            ':price' => $data['price'],
+            ':stock' => (int)($data['stock'] ?? 0),
+            ':category' => $data['category'] ?? 'General',
+        ]);
+    }
+
+    public static function deductStock(int $id, int $quantity): bool
+    {
+        $db = Database::getConnection();
+        $stmt = $db->prepare("UPDATE products SET stock = MAX(0, stock - ?) WHERE id = ?");
+        return $stmt->execute([$quantity, $id]);
+    }
+}