From ff7b0607aa4de3140f9ff938d258cad826ed09fe Mon Sep 17 00:00:00 2001
From: Lucas Yang <yangchenshin77@gmail.com>
Date: Sun, 16 Jun 2019 16:12:28 +0800
Subject: [PATCH] Fix back step no save data bug

---
 resources/views/base.blade.php            | 36 ++++++++++++-----------
 src/Http/Controllers/WizardController.php | 24 ++++++++-------
 src/Step.php                              |  2 +-
 tests/Feature/HttpTest.php                | 23 +++++++++++++--
 4 files changed, 53 insertions(+), 32 deletions(-)

diff --git a/resources/views/base.blade.php b/resources/views/base.blade.php
index a4cd892..72761b0 100644
--- a/resources/views/base.blade.php
+++ b/resources/views/base.blade.php
@@ -32,24 +32,26 @@
 
                     @include($step->view(), compact('step', 'errors'))
 
-                    <div class="d-flex justify-content-between align-items-center">
-                        @if ($stepRepo->hasPrev())
-                            <a href="{{ action($formAction, ['step' => $stepRepo->prevSlug()]) }}?trigger=back" class="btn btn-primary">
-                                @lang('wizard::generic.back')
-                            </a>
-                        @else
-                            <span></span>
-                        @endif
+                    <div class="d-flex align-items-center">
+                        <div class="mr-auto">
+                            @if ($stepRepo->hasPrev())
+                                <button type="button" class="btn btn-primary" onclick="this.form.action = '{{ action($postAction, [$step->slug(), '_trigger' => 'back']) }}'; this.form.submit();">
+                                    @lang('wizard::generic.back')
+                                </button>
+                            @endif
+                        </div>
 
-                        @if ($stepRepo->hasNext())
-                            <button type="submit" class="btn btn-primary">
-                                @lang('wizard::generic.next')
-                            </button>
-                        @else
-                            <button type="submit" class="btn btn-primary">
-                                @lang('wizard::generic.done')
-                            </button>
-                        @endif
+                        <div class="ml-auto">
+                            @if ($stepRepo->hasNext())
+                                <button type="submit" class="btn btn-primary">
+                                    @lang('wizard::generic.next')
+                                </button>
+                            @else
+                                <button type="submit" class="btn btn-primary">
+                                    @lang('wizard::generic.done')
+                                </button>
+                            @endif
+                        </div>
                     </div>
                 </form>
             </div>
diff --git a/src/Http/Controllers/WizardController.php b/src/Http/Controllers/WizardController.php
index f2b3ef6..f0c6d4a 100644
--- a/src/Http/Controllers/WizardController.php
+++ b/src/Http/Controllers/WizardController.php
@@ -95,13 +95,6 @@ public function create(Request $request, $step = null)
 
         // Check this step is not last processed step.
         if ($step->index() !== $lastProcessedIndex) {
-
-            // If trigger from 'back',
-            // Set this step index and redirect to this step.
-            if ($request->query('trigger') === 'back') {
-                return $this->setThisStepAndRedirectTo($request, $step);
-            }
-
             // Redirect to last processed step.
             return $this->redirectToLastProcessedStep(
                 $request,
@@ -137,6 +130,13 @@ public function store(Request $request, string $step)
             $step->saveData($request, $step->getRequestData($request), $step->model());
         }
 
+        // If trigger from 'back',
+        // Set this step index and redirect to prev step.
+        if ($request->query('_trigger') === 'back') {
+            $prevStep = $this->wizard()->stepRepo()->prev();
+            return $this->setThisStepAndRedirectTo($request, $prevStep);
+        }
+
         if (!$this->getNextStepSlug()) {
             // Wizard done...
             if ($this->wizard()->option('cache')) {
@@ -174,10 +174,12 @@ public function done(Request $request)
      */
     protected function setThisStepAndRedirectTo(Request $request, Step $step)
     {
-        $this->wizard()->cacheStepData(
-            $this->wizard()->cache()->get(),
-            $step->index()
-        );
+        if ($this->wizard()->option('cache')) {
+            $this->wizard()->cacheStepData(
+                $this->wizard()->cache()->get(),
+                $step->index()
+            );
+        }
 
         return redirect()->route(
             $request->route()->getName(),
diff --git a/src/Step.php b/src/Step.php
index fd2de5a..73a177c 100644
--- a/src/Step.php
+++ b/src/Step.php
@@ -53,7 +53,7 @@ abstract class Step
      *
      * @var array
      */
-    protected $inputExcept = ['_token', '_method'];
+    protected $inputExcept = ['_token', '_method', '_trigger'];
 
     /**
      * Create a new step instance.
diff --git a/tests/Feature/HttpTest.php b/tests/Feature/HttpTest.php
index b7882fa..56513ba 100644
--- a/tests/Feature/HttpTest.php
+++ b/tests/Feature/HttpTest.php
@@ -84,7 +84,7 @@ public function testRunAllWizardSteps()
         $this->assertDatabaseHas('users', [
             'name' => 'John',
         ]);
-        $this->assertDatabaseHas('posts',[
+        $this->assertDatabaseHas('posts', [
             'title' => 'Title',
             'content' => 'Content.',
         ]);
@@ -108,16 +108,33 @@ public function testWizardStepNotEquialToLastProcessedStep()
         $response->assertRedirect('/wizard/test/post-step-stub');
     }
 
-    public function testWizardStepTriggerFromBack()
+    public function testWizardStepTriggerToBack()
     {
         $this->session([
             'laravel_wizard.test' => [
+                'user-step-stub' => [
+                    'name' => 'John',
+                ],
                 '_last_index' => 1,
             ],
         ]);
 
-        $response = $this->get('/wizard/test/user-step-stub?trigger=back');
+        $response = $this->post('/wizard/test/post-step-stub?_trigger=back', [
+            'title' => 'Title',
+            'content' => 'Content.',
+        ]);
         $response->assertRedirect('/wizard/test/user-step-stub');
+
+        $this->assertEquals([
+            'user-step-stub' => [
+                'name' => 'John',
+            ],
+            'post-step-stub' => [
+                'title' => 'Title',
+                'content' => 'Content.',
+            ],
+            '_last_index' => 0,
+        ], $this->app['session']->get('laravel_wizard.test'));
     }
 
     public function testWizardCacheDatabaseDriver()