From c986506a982960dead20a69716a9a40cbe1507e6 Mon Sep 17 00:00:00 2001
From: Awilum <awilum@msn.com>
Date: Sat, 10 Aug 2019 23:57:40 +0300
Subject: [PATCH] Flextype Core: Add ability to work with different types of
 content #212 #186 - FrontmatterParser implementation

---
 flextype/parsers/FrontmatterParser.php | 50 ++++++++++++++++++++++++++
 flextype/parsers/Parser.php            | 15 +++++---
 2 files changed, 60 insertions(+), 5 deletions(-)
 create mode 100644 flextype/parsers/FrontmatterParser.php

diff --git a/flextype/parsers/FrontmatterParser.php b/flextype/parsers/FrontmatterParser.php
new file mode 100644
index 00000000..6163639e
--- /dev/null
+++ b/flextype/parsers/FrontmatterParser.php
@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Flextype (http://flextype.org)
+ * Founded by Sergey Romanenko and maintained Flextype Community.
+ */
+
+namespace Flextype;
+
+use const PHP_EOL;
+use function array_slice;
+use function count;
+use function implode;
+use function ltrim;
+use function preg_split;
+use function trim;
+
+class FrontmatterParser
+{
+    /**
+     * Front matter parser
+     *
+     * @param  string $content Content to parse
+     *
+     * @return array
+     *
+     * @access public
+     */
+    public static function frontMatterParser(string $content) : array
+    {
+        $parts = preg_split('/^[\s\r\n]?---[\s\r\n]?$/sm', PHP_EOL . ltrim($content));
+        if (count($parts) < 3) {
+            return ['matter' => [], 'body' => $content];
+        }
+
+        return ['matter' => trim($parts[1]), 'body' => implode(PHP_EOL . '---' . PHP_EOL, array_slice($parts, 2))];
+    }
+
+    public static function encode($input) : string
+    {
+        return '';
+    }
+
+    public static function decode(string $input)
+    {
+        return self::frontMatterParser($input);
+    }
+}
diff --git a/flextype/parsers/Parser.php b/flextype/parsers/Parser.php
index 79f1b9a7..1e14f668 100644
--- a/flextype/parsers/Parser.php
+++ b/flextype/parsers/Parser.php
@@ -18,12 +18,9 @@ class Parser
         ], 'yaml' => [
             'name' => 'yaml',
             'ext' => 'yaml',
-        ], 'md' => [
-            'name' => 'md',
+        ], 'frontmatter' => [
+            'name' => 'frontmatter',
             'ext' => 'md',
-        ], 'toml' => [
-            'name' => 'toml',
-            'ext' => 'toml',
         ],
     ];
 
@@ -37,6 +34,10 @@ class Parser
             case 'yaml':
                 return JsonParser::encode($input);
 
+                break;
+            case 'frontmatter':
+                return FrontmatterParser::encode($input);
+
                 break;
             default:
                 // code...
@@ -54,6 +55,10 @@ class Parser
             case 'yaml':
                 return YamlParser::decode($input);
 
+                break;
+            case 'frontmatter':
+                return FrontmatterParser::decode($input);
+
                 break;
             default:
                 // code...