From 3cd9f24935ac1c1e4970dee94542b978a7e00627 Mon Sep 17 00:00:00 2001
From: Rockingcool <aadhavan@twomorecents.org>
Date: Fri, 9 May 2025 16:12:09 -0500
Subject: [PATCH] Wrote helper functions for parseBlockquote, to parse a quoted
 line and multiple quoted lines.

---
 src/MdToHTML.hs | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/MdToHTML.hs b/src/MdToHTML.hs
index 7889863..20ac344 100644
--- a/src/MdToHTML.hs
+++ b/src/MdToHTML.hs
@@ -208,6 +208,36 @@ parsePara = do
   let parsedText = fst $ leftmostLongestParse parseLine text -- Parse a line
   return (Para parsedText)
 
+-- Parse a line starting with '>', return the line except for the '>'.
+parseQuotedLine :: ReadP String
+parseQuotedLine = do
+  char '>'
+  restOfLine <- munch (/= '\n')
+  Text.ParserCombinators.ReadP.optional (char '\n') >> return ""
+  return restOfLine
+
+-- Parse many 'quoted lines' until I see a non-quoted line.
+-- There HAS to be a better way of doing this, but I'm not sure what it is.
+-- I rewrote it because I wanted it to consume all input, rather than being non-deterministic
+-- and giving all intermediate parse results.
+parseQuotedLines :: ReadP [String]
+parseQuotedLines =
+  manyTill
+    ( do
+        look >>= \line ->
+          case line of
+            ('>' : _) -> parseQuotedLine
+            _ -> pfail
+    )
+    ( ( do
+          look >>= \line ->
+            case line of
+              ('>' : _) -> pfail
+              _ -> return ()
+      )
+        <* eof
+    )
+
 -- Parse a blockquote, which is a greater-than sign followed by a paragraph.
 parseBlockquote :: ReadP MdToken
 parseBlockquote = do