From 4147020aa49b65d08afcbff07d4f7d97acc7c4fb Mon Sep 17 00:00:00 2001
From: Ethan Dalool <ethan@voussoir.net>
Date: Thu, 2 Apr 2020 20:19:37 -0700
Subject: [PATCH] Add markdown rules for redditor, subreddit.

---
 voussoir.net/writing/vmarkdown.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/voussoir.net/writing/vmarkdown.py b/voussoir.net/writing/vmarkdown.py
index 23b78cb..afcc2d9 100644
--- a/voussoir.net/writing/vmarkdown.py
+++ b/voussoir.net/writing/vmarkdown.py
@@ -118,6 +118,8 @@ class VoussoirGrammar(mistune.InlineGrammar):
     supers = re.compile(r'(?:(\^+)([^\s]+))|(?:(\^+)\((.+?)\))')
     footnote_link = re.compile(r'\[footnote_link\]')
     footnote_text = re.compile(r'\[footnote_text\]')
+    subreddit = re.compile(r'/r/([^\s]+)')
+    redditor = re.compile(r'/u/([^\s]+)')
     # This `text` override is based on this article:
     # https://ana-balica.github.io/2015/12/21/mistune-custom-lexers-we-are-going-deeper/
     # in which we have to keep adding characters to the recognized list every
@@ -133,6 +135,8 @@ class VoussoirLexer(mistune.InlineLexer):
     default_rules.insert(0, 'supers')
     default_rules.insert(0, 'footnote_link')
     default_rules.insert(0, 'footnote_text')
+    default_rules.insert(0, 'subreddit')
+    default_rules.insert(0, 'redditor')
 
     def __init__(self, renderer, **kwargs):
         rules = VoussoirGrammar()
@@ -170,6 +174,12 @@ class VoussoirLexer(mistune.InlineLexer):
         text = self.output(text)
         return f'{"<sup>" * carets}{text}{"</sup>" * carets}'
 
+    def output_subreddit(self, m):
+        return f'<a href="https://old.reddit.com{m.group(0)}">{m.group(1)}</a>'
+
+    def output_redditor(self, m):
+        return f'<a href="https://old.reddit.com{m.group(0)}">{m.group(1)}</a>'
+
 footnote_link_index = 1
 footnote_text_index = 1