prevent selling more than owned

2024-08-31 22:05:47 -05:00
parent d6cf867c6d
commit a19a58fca9
4 changed files with 54 additions and 1 deletions
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Rules;
+
+use App\Models\Portfolio;
+use Illuminate\Contracts\Validation\ValidationRule;
+
+class QuantityValidationRule implements ValidationRule
+{
+    /**
+     * Create a new rule instance.
+     *
+     * @return void
+     */
+    public function __construct(
+        protected Portfolio $portfolio, 
+        protected string $symbol, 
+        protected string $transactionType
+    ) {
+        $this->portfolio = $portfolio;
+        $this->symbol = $symbol;
+        $this->transactionType = $transactionType;
+    }
+
+    /**
+     * Validate the attribute.
+     *
+     * @param  string  $attribute
+     * @param  mixed  $value
+     * @param  \Closure  $fail
+     * @return void
+     */
+    public function validate(string $attribute, mixed $value, \Closure $fail): void
+    {
+        if ($this->transactionType == 'SELL') {
+            $holding = $this->portfolio->holdings()->symbol($this->symbol)->first();
+            $maxQuantity = $holding ? $holding->quantity : 0;
+            
+            if ($value > $maxQuantity) {
+                $fail(__('The quantity must not be greater than the available quantity.'));
+            }
+        }
+    }
+}