reupload

app/Rules/ProductStockIsAvailable.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Rules;
+
+use Closure;
+use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Support\Facades\DB;
+
+class ProductStockIsAvailable implements ValidationRule
+{
+    /**
+     * Check given request of items is available in stock
+     */
+    public function __construct(
+        public int $product_quantity
+    ) {}
+
+    /**
+     * Run the validation rule.
+     *
+     * @param  \Closure(string): \Illuminate\Translation\PotentiallyTranslatedString  $fail
+     */
+    public function validate(string $attribute, mixed $value, Closure $fail): void
+    {
+        if (is_null($value) || ! is_int($value)) {
+            return;
+        }
+
+        $product = DB::table('products')->where('id', $value)->select(['id', 'stock', 'security_stock'])->first();
+
+        if (is_null($product)) {
+            $fail(__('product_id is invalid'));
+
+            return;
+        }
+
+        // Get the sellable stock
+        $sellable_stock = ($product->security_stock) ? $product->stock - $product->security_stock : $product->stock;
+
+        if ($this->product_quantity > $sellable_stock) {
+            $fail(sprintf(':attribute (%s) too much requested, product stock is: %s', $this->product_quantity, $product->stock));
+        }
+    }
+}