1 files changed, 30 insertions, 0 deletions
diff --git a/lib/markup.php b/lib/markup.php
new file mode 100644
index 0000000..52ccf24
--- /dev/null
+++ b/lib/markup.php
@@ -0,0 +1,30 @@
+<?php
+
+class markup {
+
+    public static function markdownToHtml(string $md, bool $use_image_previews = true): string {
+        $pd = new MyParsedown(useImagePreviews: $use_image_previews);
+        return $pd->text($md);
+    }
+
+    public static function htmlToText(string $html): string {
+        $text = html_entity_decode(strip_tags($html));
+        $lines = explode("\n", $text);
+        $lines = array_map('trim', $lines);
+        $text = implode("\n", $lines);
+        $text = preg_replace("/(\r?\n){2,}/", "\n\n", $text);
+        return $text;
+    }
+
+    public static function htmlRetinaFix(string $html): string {
+        global $config;
+        return preg_replace_callback(
+            '/('.preg_quote($config['uploads_host'], '/').'\/\w{8}\/p)(\d+)x(\d+)(\.jpg)/',
+            function($match) {
+                return $match[1].(intval($match[2])*2).'x'.(intval($match[3])*2).$match[4];
+            },
+            $html
+        );
+    }
+
+}
+\ No newline at end of file