Fixed markdown content not stored on first page save

HTML content was still saved.
This changes makes the back-end check for md content
instead of html to ensure that gets stored in cases
where both are sent to the system.

Closes #2446

app/Entities/Repos/PageRepo.php

@@ -210,10 +210,10 @@ class PageRepo
         }
 
         $pageContent = new PageContent($page);
-        if (isset($input['html'])) {
-            $pageContent->setNewHTML($input['html']);
-        } else {
+        if (isset($input['markdown'])) {
             $pageContent->setNewMarkdown($input['markdown']);
+        } else {
+            $pageContent->setNewHTML($input['html']);
         }
     }
 

tests/Entity/PageTest.php

@@ -1,10 +1,40 @@
 <?php namespace Tests\Entity;
 
+use BookStack\Entities\Models\Book;
 use BookStack\Entities\Models\Page;
 use Tests\TestCase;
 
 class PageTest extends TestCase
 {
+    public function test_page_creation_with_markdown_content()
+    {
+        $this->setSettings(['app-editor' => 'markdown']);
+        $book = Book::query()->first();
+
+        $this->asEditor()->get($book->getUrl('/create-page'));
+        $draft = Page::query()->where('book_id', '=', $book->id)
+            ->where('draft', '=', true)->first();
+
+        $details = [
+            'markdown' => '# a title',
+            'html' => '<h1>a title</h1>',
+            'name' => 'my page',
+        ];
+        $resp = $this->post($book->getUrl("/draft/{$draft->id}"), $details);
+        $resp->assertRedirect();
+
+        $this->assertDatabaseHas('pages', [
+            'markdown' => $details['markdown'],
+            'name' => $details['name'],
+            'id' => $draft->id,
+            'draft' => false
+        ]);
+
+        $draft->refresh();
+        $resp = $this->get($draft->getUrl("/edit"));
+        $resp->assertSee("# a title");
+    }
+
     public function test_page_delete()
     {
         $page = Page::query()->first();