Fix shuffle with keys

.gitignore

@@ -1 +1,2 @@
 /vendor/
+/tests/cache/

src/AntiBotLinks.php

@@ -60,9 +60,8 @@ public function generateLinks(int $amount = 4): array
     {
         return Cache::remember($this->identifierHash, $this->expiresIn, function () use ($amount) {
             // Randomly get set of words and randomize it words order
-            $universe = collect(collect($this->wordUniverse)->random())
-                ->shuffle()
-                ->slice(0, $amount);
+            $words    = collect($this->wordUniverse)->random();
+            $universe = collect($this->getRandomShuffled((array) $words, $amount));
 
             // 50% of chance to flip solution/answers
             if (random_int(0, 1)) {

src/Traits/HasHelpers.php

@@ -11,4 +11,29 @@ protected function asset(string $path): string
     {
         return __DIR__ . '/../../assets/' . $path;
     }
+
+    /*
+     * Get random set of values from a shuffled with keys array.
+     */
+    protected function getRandomShuffled(array $array, int $amount): array
+    {
+        return array_slice($this->shuffleWithKeys($array), 0, $amount, true);
+    }
+
+    /**
+     * Shuffle array without loosing keys.
+     */
+    protected function shuffleWithKeys(array $array): array
+    {
+        $keys = array_keys($array);
+
+        shuffle($keys);
+
+        $new = [];
+        foreach ($keys as $key) {
+            $new[$key] = $array[$key];
+        }
+
+        return $new;
+    }
 }