Parent tag classes

app/Activity/Models/Tag.php

@@ -12,6 +12,8 @@
  * @property int    $id
  * @property string $name
  * @property string $value
+ * @property int    $entity_id
+ * @property string $entity_type
  * @property int    $order
  */
 class Tag extends Model

app/Activity/Tools/TagClassGenerator.php

@@ -3,17 +3,15 @@
 namespace BookStack\Activity\Tools;
 
 use BookStack\Activity\Models\Tag;
+use BookStack\Entities\Models\BookChild;
+use BookStack\Entities\Models\Entity;
+use BookStack\Entities\Models\Page;
 
 class TagClassGenerator
 {
-    protected array $tags;
-
-    /**
-     * @param Tag[] $tags
-     */
-    public function __construct(array $tags)
-    {
-        $this->tags = $tags;
+    public function __construct(
+        protected Entity $entity
+    ) {
     }
 
     /**
@@ -22,14 +20,23 @@ public function __construct(array $tags)
     public function generate(): array
     {
         $classes = [];
+        $tags = $this->entity->tags->all();
+
+        foreach ($tags as $tag) {
+             array_push($classes, ...$this->generateClassesForTag($tag));
+        }
+
+        if ($this->entity instanceof BookChild && userCan('view', $this->entity->book)) {
+            $bookTags = $this->entity->book->tags;
+            foreach ($bookTags as $bookTag) {
+                 array_push($classes, ...$this->generateClassesForTag($bookTag, 'book-'));
+            }
+        }
 
-        foreach ($this->tags as $tag) {
-            $name = $this->normalizeTagClassString($tag->name);
-            $value = $this->normalizeTagClassString($tag->value);
-            $classes[] = 'tag-name-' . $name;
-            if ($value) {
-                $classes[] = 'tag-value-' . $value;
-                $classes[] = 'tag-pair-' . $name . '-' . $value;
+        if ($this->entity instanceof Page && $this->entity->chapter && userCan('view', $this->entity->chapter)) {
+            $chapterTags = $this->entity->chapter->tags;
+            foreach ($chapterTags as $chapterTag) {
+                 array_push($classes, ...$this->generateClassesForTag($chapterTag, 'chapter-'));
             }
         }
 
@@ -41,6 +48,22 @@ public function generateAsString(): string
         return implode(' ', $this->generate());
     }
 
+    /**
+     * @return string[]
+     */
+    protected function generateClassesForTag(Tag $tag, string $prefix = ''): array
+    {
+        $classes = [];
+        $name = $this->normalizeTagClassString($tag->name);
+        $value = $this->normalizeTagClassString($tag->value);
+        $classes[] = "{$prefix}tag-name-{$name}";
+        if ($value) {
+            $classes[] = "{$prefix}tag-value-{$value}";
+            $classes[] = "{$prefix}tag-pair-{$name}-{$value}";
+        }
+        return $classes;
+    }
+
     protected function normalizeTagClassString(string $value): string
     {
         $value = str_replace(' ', '', strtolower($value));

resources/views/entities/body-tag-classes.blade.php

@@ -1 +1 @@
-@push('body-class', e((new \BookStack\Activity\Tools\TagClassGenerator($entity->tags->all()))->generateAsString() . ' '))
+@push('body-class', e((new \BookStack\Activity\Tools\TagClassGenerator($entity))->generateAsString() . ' '))

tests/Entity/TagTest.php

@@ -230,4 +230,39 @@ public function test_tag_classes_are_escaped()
         $resp->assertDontSee('tag-name-<>', false);
         $resp->assertSee('tag-name-&lt;&gt;', false);
     }
+
+    public function test_parent_tag_classes_visible()
+    {
+        $page = $this->entities->pageWithinChapter();
+        $page->chapter->tags()->create(['name' => 'My Chapter Tag', 'value' => 'abc123']);
+        $page->book->tags()->create(['name' => 'My Book Tag', 'value' => 'def456']);
+        $this->asEditor();
+
+        $html = $this->withHtml($this->get($page->getUrl()));
+        $html->assertElementExists('body.chapter-tag-pair-mychaptertag-abc123');
+        $html->assertElementExists('body.book-tag-pair-mybooktag-def456');
+
+        $html = $this->withHtml($this->get($page->chapter->getUrl()));
+        $html->assertElementExists('body.book-tag-pair-mybooktag-def456');
+    }
+
+    public function test_parent_tag_classes_not_visible_if_cannot_see_parent()
+    {
+        $page = $this->entities->pageWithinChapter();
+        $page->chapter->tags()->create(['name' => 'My Chapter Tag', 'value' => 'abc123']);
+        $page->book->tags()->create(['name' => 'My Book Tag', 'value' => 'def456']);
+        $editor = $this->users->editor();
+        $this->actingAs($editor);
+
+        $this->permissions->setEntityPermissions($page, ['view'], [$editor->roles()->first()]);
+        $this->permissions->disableEntityInheritedPermissions($page->chapter);
+
+        $html = $this->withHtml($this->get($page->getUrl()));
+        $html->assertElementNotExists('body.chapter-tag-pair-mychaptertag-abc123');
+        $html->assertElementExists('body.book-tag-pair-mybooktag-def456');
+
+        $this->permissions->disableEntityInheritedPermissions($page->book);
+        $html = $this->withHtml($this->get($page->getUrl()));
+        $html->assertElementNotExists('body.book-tag-pair-mybooktag-def456');
+    }
 }