From eeb84c5be16ecca239adae9c851bc0f7db0875a1 Mon Sep 17 00:00:00 2001
From: Evgeny Zinoviev <me@ch1p.io>
Date: Sat, 4 Mar 2023 01:46:45 +0300
Subject: blog: support ToC

---
 lib/MyParsedown.php |  9 +++++++--
 lib/markup.php      | 13 +++++++++++++
 2 files changed, 20 insertions(+), 2 deletions(-)

(limited to 'lib')

diff --git a/lib/MyParsedown.php b/lib/MyParsedown.php
index cd537bc..85ed9c4 100644
--- a/lib/MyParsedown.php
+++ b/lib/MyParsedown.php
@@ -3,13 +3,18 @@
 class MyParsedown extends ParsedownExtended {
 
     public function __construct(
+        ?array $opts = null,
         protected bool $useImagePreviews = false
     ) {
-        parent::__construct([
+        $parsedown_opts = [
             'tables' => [
                 'tablespan' => true
             ]
-        ]);
+        ];
+        if (!is_null($opts)) {
+            $parsedown_opts = array_merge($parsedown_opts, $opts);
+        }
+        parent::__construct($parsedown_opts);
 
         $this->InlineTypes['{'][] = 'FileAttach';
         $this->InlineTypes['{'][] = 'Image';
diff --git a/lib/markup.php b/lib/markup.php
index 2f25c6c..f6ddd0f 100644
--- a/lib/markup.php
+++ b/lib/markup.php
@@ -7,6 +7,19 @@ class markup {
         return $pd->text($md);
     }
 
+    public static function toc(string $md): string {
+        $pd = new MyParsedown([
+            'toc' => [
+                'lowercase' => true,
+                'transliterate' => true,
+                'urlencode' => false,
+                'headings' => ['h1', 'h2', 'h3']
+            ]
+        ]);
+        $pd->text($md);
+        return $pd->contentsList();
+    }
+
     public static function htmlToText(string $html): string {
         $text = html_entity_decode(strip_tags($html));
         $lines = explode("\n", $text);
-- 
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