implement getLinks method

README.md

@@ -75,15 +75,33 @@ echo $reader->toGemini(
 Get document title
 
 ```
-echo $reader->getH1(
+$gemini = $reader->toGemini(
     file_get_contents(
         '/host/data/pages/index.txt'
     )
 );
+
+echo $reader->getH1(
+    $gemini
+);
 ```
 
 #### Reader::getLinks
 
+Get document links
+
+```
+$gemini = $reader->toGemini(
+    file_get_contents(
+        '/host/data/pages/index.txt'
+    )
+);
+
+echo $reader->getLinks(
+    $gemini
+);
+```
+
 ### Filesystem
 
 Provides methods for simple and secure interaction with DokuWiki file storage

src/Dokuwiki/Reader.php

@@ -246,12 +246,12 @@ class Reader
         );
     }
 
-    public function getH1(string $data): ?string
+    public function getH1(string $gemini, ?string $regex = '/^[\s]?#([^#]+)/'): ?string
     {
-        foreach ((array) explode(PHP_EOL, $data) as $line)
+        foreach ((array) explode(PHP_EOL, $gemini) as $line)
         {
             preg_match_all(
-                '/^[\s]?#([^#]+)/',
+                $regex,
                 $line,
                 $matches
             );
@@ -266,4 +266,27 @@ class Reader
             }
         }
     }
+
+    public function getLinks(string $gemini, ?string $regex = '/[A-z]+:\/\/\S+/'): array
+    {
+        $links = [];
+
+        preg_match_all(
+            $regex,
+            $gemini,
+            $matches
+        );
+
+        if (!empty($matches[0]))
+        {
+            foreach ((array) $matches[0] as $link)
+            {
+                $links[] = trim(
+                    $link
+                );
+            }
+        }
+
+        return $links;
+    }
 }