Fixed issue where markdown drafts showed as HTML

Markdown content was not being stored, only the sent
HTML representation, causing the draft to show as HTML upon next edit.
Added test to cover.

Fixes #3054

app/Entities/Repos/PageRepo.php

@@ -252,9 +252,7 @@ class PageRepo
     {
         // If the page itself is a draft simply update that
         if ($page->draft) {
-            if (isset($input['html'])) {
-                (new PageContent($page))->setNewHTML($input['html']);
-            }
+            $this->updateTemplateStatusAndContentFromInput($page, $input);
             $page->fill($input);
             $page->save();
 

tests/Entity/PageDraftTest.php

@@ -178,4 +178,30 @@ class PageDraftTest extends TestCase
             'html' => $page->html,
         ]);
     }
+
+    public function test_updating_page_draft_with_markdown_retains_markdown_content()
+    {
+        /** @var Book $book */
+        $book = Book::query()->first();
+        $this->asEditor()->get($book->getUrl('/create-page'));
+        /** @var Page $draft */
+        $draft = Page::query()->where('draft', '=', true)->where('book_id', '=', $book->id)->firstOrFail();
+
+        $resp = $this->put('/ajax/page/' . $draft->id . '/save-draft', [
+            'name' => 'My updated draft',
+            'markdown' => "# My markdown page\n\n[A link](https://example.com)",
+            'html' => '<p>checking markdown takes priority over this</p>'
+        ]);
+        $resp->assertOk();
+
+        $this->assertDatabaseHas('pages', [
+            'id' => $draft->id,
+            'draft' => true,
+            'name' => 'My updated draft',
+            'markdown' => "# My markdown page\n\n[A link](https://example.com)",
+        ]);
+
+        $draft->refresh();
+        $this->assertStringContainsString('href="https://example.com"', $draft->html);
+    }
 }