From 60edcd04e52323050792252009512f7592f3b66c Mon Sep 17 00:00:00 2001
From: Lukas Fleischer <archlinux@cryptocrack.de>
Date: Sun, 3 Oct 2010 21:51:45 +0200
Subject: Make external links in comments clickable (FS#20137).

Comments are now split at link boundaries and links are converted
separately. I find this to be a much cleaner way than re-converting
comments that have already been converted using htmlspecialchars(). This
also doesn't require any callback procedure.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
---
 web/lib/aur.inc               | 24 ++++++++++++++++++++++++
 web/template/pkg_comments.php |  2 +-
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/web/lib/aur.inc b/web/lib/aur.inc
index bd69c4c0..a6292caa 100644
--- a/web/lib/aur.inc
+++ b/web/lib/aur.inc
@@ -494,3 +494,27 @@ function salted_hash($passwd, $salt)
 	}
 	return md5($salt . $passwd);
 }
+
+function parse_comment($comment)
+{
+	$url_pattern = '/(\b(?:https?|ftp):\/\/[\w\/\#~:.?+=&%@!\-;,]+?' .
+		'(?=[.:?\-;,]*(?:[^\w\/\#~:.?+=&%@!\-;,]|$)))/iS';
+
+	$matches = preg_split($url_pattern, $comment, -1,
+		PREG_SPLIT_DELIM_CAPTURE);
+
+	$html = '';
+	for ($i = 0; $i < count($matches); $i++) {
+		if ($i % 2) {
+			# convert links
+			$html .= '<a href="' . htmlspecialchars($matches[$i]) .
+				'">' .  htmlspecialchars($matches[$i]) . '</a>';
+		}
+		else {
+			# convert everything else
+			$html .= nl2br(htmlspecialchars($matches[$i]));
+		}
+	}
+
+	return $html;
+}
diff --git a/web/template/pkg_comments.php b/web/template/pkg_comments.php
index e4a9da13..dce3a171 100644
--- a/web/template/pkg_comments.php
+++ b/web/template/pkg_comments.php
@@ -25,7 +25,7 @@ while (list($indx, $carr) = each($comments)) { ?>
 ?></div>
 	<blockquote class="comment-body">
 	<div>
-<?php echo nl2br(htmlspecialchars($carr['Comments'])) ?>
+<?php echo parse_comment($carr['Comments']) ?>
 	</div>
 	</blockquote>
 <?php
-- 
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