支援者♡限定記事対応

src/Site/Controller/BlogPost.php

@@ -11,6 +11,7 @@ class BlogPost {
     $path = ROOT.$section;
     $posts = [];
     $isMember = $user !== NULL && $user->role !== \Roles::BANNED;
+    $isPaywall = $user !== NULL && $user->role >= \Roles::SUBSCRIBER;
     $isStaff = $user !== NULL && $user->role & (\Roles::ADMIN | \Roles::STAFF);
 
     if (!is_dir($path)) return $posts;
@@ -46,6 +47,9 @@ class BlogPost {
       $preview = mb_substr(strip_tags($articleBody), 0, 50).'...';
       $slug = basename($file, '.md');
       if (isset($metadata['draft']) && !$isStaff) continue;
+      $cannotPreview = (!$isMember && in_array('memberonly', $metadata['category']))
+                    || ((!$isPaywall && !$isStaff) && in_array('subscriberonly', $metadata['category']))
+                    || (!$isStaff && in_array('staffonly', $metadata['category']));
 
       $posts[] = [
         'title' => $metadata['title'] ?? '',
@@ -54,7 +58,7 @@ class BlogPost {
         'thumborient' => $metadata['thumborient'] ?? '',
         'category' => $metadata['category'] ?? [],
         'uuid' => $metadata['uuid'] ?? '',
-        'preview' => ((!$isMember && in_array('memberonly', $metadata['category'])) || (!$isStaff && in_array('staffonly', $metadata['category'])) ? '未許可' : $preview),
+        'preview' => ($cannotPreview ? '未許可' : $preview),
         'slug' => $slug,
       ];
     }