From cdbe8eedd5bc4dd309712a31b32d3842c02034a5 Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Tue, 3 Apr 2007 20:06:32 +0000
Subject: [PATCH] Added a system to extract the link map...

---
 Markdown.php | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/Markdown.php b/Markdown.php
index 1a02235..2481b3f 100644
--- a/Markdown.php
+++ b/Markdown.php
@@ -66,6 +66,12 @@ class BSMarkdown
 		'noscript'
 	);
 	
+	/**
+	* Map of link IDs to their link
+	* @var string
+	*/
+	private $linkMap = array();
+	
 	// ###################################################################
 	/**
 	* Quick parsing function that uses the system defaults for parsing.
@@ -108,6 +114,7 @@ class BSMarkdown
 		$this->text = preg_replace('/^\s*?$/m', '', $this->text);
 		
 		$this->_extractHtmlBlocks();
+		$this->_extractLinkMap();
 		
 		$this->_convertHardLineBreaks();
 		$this->_convertAtxHeaders();
@@ -174,6 +181,26 @@ class BSMarkdown
 		return str_replace(array_keys($this->htmlBlockMap), array_values($this->htmlBlockMap), $text);
 	}
 	
+	// ###################################################################
+	/**
+	* Extracts all links in the "[id]: link" form
+	*/
+	public function _extractLinkMap()
+	{
+		$this->text = preg_replace_callback('/\[(\w+)\]:\s*<?(\S+)>?(\s*(("|\')|\()(.*?)(\4|\)))?\n?/', array(&$this, '_extractLinkMapCallback'), $this->text);
+	}
+	
+	// ###################################################################
+	/**
+	* Converts extracted link definitions into the map
+	*
+	* @param	array	Matches array
+	*/
+	private function _extractLinkMapCallback($matches)
+	{
+		$this->linkMap[$matches[1]] = array($matches[2], $matches[6]);
+	}
+	
 	// ###################################################################
 	/**
 	* Converts text surrounded by #sings to headers (## Heading 2)
@@ -191,7 +218,7 @@ class BSMarkdown
 	*/
 	private function _convertAtxHeadersCallback($matches)
 	{
-		var_dump($matches);
+		// var_dump($matches);
 		$html = '<h' . strlen($matches[1]) . '>' . $this->_expandHtmlBlocks($matches[2]) . '</h' . strlen($matches[1]) . '>';
 		$hash = md5($html . microtime());
 		$this->htmlBlockMap[$hash] = $html;
-- 
2.22.5