use encryption in cached settings

src/Settings.php

@@ -13,6 +13,7 @@
 use Spatie\LaravelSettings\Events\SettingsLoaded;
 use Spatie\LaravelSettings\Events\SettingsSaved;
 use Spatie\LaravelSettings\SettingsRepositories\SettingsRepository;
+use Spatie\LaravelSettings\Support\Crypto;
 
 abstract class Settings implements Arrayable, Jsonable, Responsable
 {
@@ -120,12 +121,35 @@ public function __isset($name)
 
     public function __serialize(): array
     {
-        return $this->toCollection()->all();
+        /** @var Collection $encrypted */
+        /** @var Collection $nonEncrypted */
+        [$encrypted, $nonEncrypted] = $this->toCollection()->partition(
+            fn($value, string $name) => $this->config->isEncrypted($name)
+        );
+
+        return array_merge(
+            $encrypted->map(fn($value) => Crypto::encrypt($value))->all(),
+            $nonEncrypted->all()
+        );
     }
 
     public function __unserialize(array $data): void
     {
         $this->loaded = false;
+
+        $this->ensureConfigIsLoaded();
+
+        /** @var Collection $encrypted */
+        /** @var Collection $nonEncrypted */
+        [$encrypted, $nonEncrypted] = collect($data)->partition(
+            fn($value, string $name) => $this->config->isEncrypted($name)
+        );
+
+        $data = array_merge(
+            $encrypted->map(fn($value) => Crypto::decrypt($value))->all(),
+            $nonEncrypted->all()
+        );
+
         $this->loadValues($data);
     }
 

tests/SettingsTest.php

@@ -435,7 +435,7 @@
 
     assertDatabaseMissing('migrations', ['migration' => '2018_11_21_091111_create_fake_settings']);
     assertDatabaseHas('migrations', ['migration' => '2018_11_21_091111_create_fake_table']);
-})->skip(fn () => Str::startsWith(app()->version(), '7'), 'No support for dumping migrations in Laravel 7');
+})->skip(fn() => Str::startsWith(app()->version(), '7'), 'No support for dumping migrations in Laravel 7');
 
 it('will not contact the repository when loading cached settings', function () {
     useEnabledCache($this->app);
@@ -458,6 +458,32 @@
     expect($log)->toHaveCount(0);
 });
 
+it('will cache encrypted setting', function () {
+    useEnabledCache($this->app);
+
+    $data = [
+        'string' => 'Hello',
+        'nullable' => null,
+        'cast' => new DateTime('2020-05-16'),
+    ];
+
+    $cache = resolve(SettingsCache::class);
+
+    $cache->put(new DummyEncryptedSettings($data));
+
+    $serialized = Cache::get('settings.'.DummyEncryptedSettings::class);
+
+    expect($serialized)->not()->toContain($data['string']);
+
+    $this->setRegisteredSettings([
+        DummyEncryptedSettings::class,
+    ]);
+
+    $decrypted = resolve(DummyEncryptedSettings::class);
+
+    expect($decrypted->string)->toEqual($data['string']);
+});
+
 it('can clear a settings cache', function () {
     useEnabledCache($this->app);