From 0c45ffac2d8648fec4fa5e935754f4d34952983b Mon Sep 17 00:00:00 2001
From: Jonas Kohl
Date: Sat, 12 Oct 2024 19:54:01 +0200
Subject: Add rich text support

---
 src/index.php | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

(limited to 'src/index.php')

diff --git a/src/index.php b/src/index.php
index 6e1522c..4fe060c 100644
--- a/src/index.php
+++ b/src/index.php
@@ -12,7 +12,7 @@ use mystic\forum\utils\RequestUtils;
 
 header_remove("X-Powered-By");
 
-const MYSTICBB_VERSION = "0.4.6";
+const MYSTICBB_VERSION = "0.5.0";
 
 if (($_SERVER["HTTP_USER_AGENT"] ?? "") === "") {
     http_response_code(403);
@@ -163,6 +163,29 @@ function reArrayFiles(&$file_post) {
     return $file_ary;
 }
 
+const TAGS_REGEX = '/\[(b|i|u|s|\\^|_|spoiler)\](.+?)\[\/\1\]/s';
+
+function expandTags(string $contents): string {
+    return preg_replace_callback(TAGS_REGEX, function(array $m) {
+        $randomId = "target-" . bin2hex(random_bytes(8));
+        $inner = $m[2];
+        $tag = [
+            "b" => ["<strong>", "</strong>" ],
+            "i" => ["<em>", "</em>" ],
+            "s" => ["<del>", "</del>" ],
+            "^" => ["<sup>", "</sup>" ],
+            "_" => ["<sub>", "</sub>" ],
+            "spoiler" => [ "<div class=\"panel panel-default\"><div class=\"panel-heading\"><div class=\"panel-title\"><a role=\"button\" data-toggle=\"collapse\" href=\"#$randomId\"><i class=\"fa fa-eye\"></i> Spoiler</a></div></div><div id=\"$randomId\" class=\"panel-collapse collapse\"><div class=\"panel-body\">", "</div></div></div>" ],
+        ][$m[1]] ?? $m[1];
+        if (preg_match(TAGS_REGEX, $inner))
+            $inner = expandTags($inner);
+        if (!is_array($tag)) $tag = [ "<$tag>", "</$tag>" ];
+        $tagsBefore = $tag[0];
+        $tagsAfter = $tag[1];
+        return "{$tagsBefore}{$inner}{$tagsAfter}";
+    }, $contents);
+}
+
 function renderPost(string $contents): string {
     $contents = preg_replace('~\R~u', "\n", $contents);
     $contents = trim($contents);
@@ -197,6 +220,7 @@ function renderPost(string $contents): string {
     } else {
         $contents .= implode("\n", $lineBuf);
     }
+    $contents = expandTags($contents);
 
     return $contents;
 }
-- 
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