Initial commit

app/Http/Controllers/Concerns/ManagesCaptcha.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Http\Controllers\Concerns;
+
+use Illuminate\Http\Request;
+
+trait ManagesCaptcha
+{
+    protected function buildCaptchaQuestion(Request $request, string $context): string
+    {
+        $first = random_int(2, 9);
+        $second = random_int(1, 9);
+        $isSubtraction = random_int(0, 1) === 1;
+
+        if ($isSubtraction && $second > $first) {
+            [$first, $second] = [$second, $first];
+        }
+
+        $question = $isSubtraction ? "{$first} - {$second}" : "{$first} + {$second}";
+        $answer = (string) ($isSubtraction ? $first - $second : $first + $second);
+
+        $request->session()->put("captcha.{$context}.answer", $answer);
+
+        return $question;
+    }
+
+    protected function captchaIsValid(Request $request, string $context, string $field = 'captcha'): bool
+    {
+        $expected = (string) $request->session()->get("captcha.{$context}.answer", '');
+        $provided = trim((string) $request->input($field, ''));
+
+        return $expected !== '' && hash_equals($expected, $provided);
+    }
+
+    protected function clearCaptcha(Request $request, string $context): void
+    {
+        $request->session()->forget("captcha.{$context}.answer");
+    }
+}