add gemtext features

src/Gemtext/Body.php

@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Gemini\Gemtext;
+
+class Body
+{
+    private array $_lines = [];
+
+    public function __construct(string $gemtext)
+    {
+        foreach ((array) explode(PHP_EOL, $gemtext) as $line)
+        {
+            $this->_lines[] = $line;
+        }
+    }
+
+    public function getH1(): array
+    {
+        $matches = [];
+
+        foreach ($this->_lines as $line)
+        {
+            if (preg_match('/^#([^#]+)/', trim($line), $match))
+            {
+                $matches[] = trim(
+                    $match[1]
+                );
+            }
+        }
+
+        return $matches;
+    }
+
+    public function getH2(): array
+    {
+        $matches = [];
+
+        foreach ($this->_lines as $line)
+        {
+            if (preg_match('/^##([^#]+)/', trim($line), $match))
+            {
+                $matches[] = trim(
+                    $match[1]
+                );
+            }
+        }
+
+        return $matches;
+    }
+
+    public function getH3(): array
+    {
+        $matches = [];
+
+        foreach ($this->_lines as $line)
+        {
+            if (preg_match('/^###([^#]+)/', trim($line), $match))
+            {
+                $matches[] = trim(
+                    $match[1]
+                );
+            }
+        }
+
+        return $matches;
+    }
+
+    public function getLinks(): array
+    {
+        $matches = [];
+
+        foreach ($this->_lines as $i => $line)
+        {
+            if (preg_match('/^=>(.*)/', trim($line), $match))
+            {
+                $matches[] = trim(
+                    $match[1]
+                );
+            }
+        }
+
+        return $matches;
+    }
+}