Comments

README.md

@@ -10,6 +10,7 @@ Yep! It's a looking glass for your [lava rocks](https://en.wikipedia.org/wiki/Ob
   - [x] Fully support [Obsidian's embedded image format](https://help.obsidian.md/How+to/Embed+files#Developer+notes)
     - [x] Including resizing
   - [ ] Safely support `iframe` embeds
+  - [ ] [Comments](https://help.obsidian.md/How+to/Format+your+notes#Comments)
   - [x] Allow marking certain folders as private
   - [x] Parsing/syntax highlighting of code blocks?
   - [x] Mermaid.js

app/Services/ArticleParser/InlineParser/ArticleCommentParser.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Services\ArticleParser\InlineParser;
+
+use League\CommonMark\Extension\CommonMark\Node\Inline\Link;
+use League\CommonMark\Parser\Inline\InlineParserMatch;
+use League\CommonMark\Parser\InlineParserContext;
+
+class ArticleCommentParser implements \League\CommonMark\Parser\Inline\InlineParserInterface
+{
+
+    public function getMatchDefinition(): InlineParserMatch
+    {
+        return InlineParserMatch::regex('%%(.*)%%');
+    }
+
+    public function parse(InlineParserContext $inlineContext): bool
+    {
+        $cursor = $inlineContext->getCursor();
+
+        // The # symbol must not have any other characters immediately prior
+        $previousChar = $cursor->peek(-1);
+        if (!in_array($previousChar, [null, ' ', "\n"])) {
+            // peek() doesn't modify the cursor, so no need to restore state first
+            return false;
+        }
+
+        // This seems to be a valid match
+        // Advance the cursor to the end of the match
+        $cursor->advanceBy($inlineContext->getFullMatchLength());
+
+        if($cursor->isAtEnd()) {
+            return true;
+        }
+
+        $nextChar = $cursor->peek();
+        if (!in_array($nextChar, [null, ' ', "\n"])) {
+            // peek() doesn't modify the cursor, so no need to restore state first
+            return false;
+        }
+
+        return true;
+    }
+}

app/Services/ArticleParser/Pipeline/ConvertMarkdownToHtml.php

@@ -3,6 +3,7 @@
 namespace App\Services\ArticleParser\Pipeline;
 
 use App\Models\Article;
+use App\Services\ArticleParser\InlineParser\ArticleCommentParser;
 use App\Services\ArticleParser\InlineParser\ArticleTagParser;
 use App\Services\ArticleParser\Pipe;
 use League\CommonMark\Environment\Environment;
@@ -98,6 +99,7 @@ private function createParser(): MarkdownConverter
         $environment->addExtension(new FrontMatterExtension());
 
         $environment->addInlineParser(new ArticleTagParser());
+        $environment->addInlineParser(new ArticleCommentParser());
 
         return new MarkdownConverter($environment);
     }