diff --git a/composer.json b/composer.json
index 6ccb565..40b0f3b 100644
--- a/composer.json
+++ b/composer.json
@@ -13,6 +13,7 @@
         "league/commonmark": "^2.3"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5"
+        "phpunit/phpunit": "^9.5",
+        "mikey179/vfsstream": "^1.6"
     }
 }
diff --git a/composer.lock b/composer.lock
index 97409ef..0b30bce 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "cc27d276519ce69d017e43bec647a98a",
+    "content-hash": "848176d1d39c31f3ecc3bbea8204ac22",
     "packages": [
         {
             "name": "dflydev/dot-access-data",
@@ -688,6 +688,57 @@
             ],
             "time": "2022-03-03T08:28:38+00:00"
         },
+        {
+            "name": "mikey179/vfsstream",
+            "version": "v1.6.10",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/bovigo/vfsStream.git",
+                "reference": "250c0825537d501e327df879fb3d4cd751933b85"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/bovigo/vfsStream/zipball/250c0825537d501e327df879fb3d4cd751933b85",
+                "reference": "250c0825537d501e327df879fb3d4cd751933b85",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.5|^5.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.6.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "org\\bovigo\\vfs\\": "src/main/php"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Frank Kleine",
+                    "homepage": "http://frankkleine.de/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Virtual file system to mock the real file system in unit tests.",
+            "homepage": "http://vfs.bovigo.org/",
+            "support": {
+                "issues": "https://github.com/bovigo/vfsStream/issues",
+                "source": "https://github.com/bovigo/vfsStream/tree/master",
+                "wiki": "https://github.com/bovigo/vfsStream/wiki"
+            },
+            "time": "2021-09-25T08:05:01+00:00"
+        },
         {
             "name": "myclabs/deep-copy",
             "version": "1.11.0",
diff --git a/src/ArticleParser.php b/src/ArticleParser.php
new file mode 100644
index 0000000..d9755f8
--- /dev/null
+++ b/src/ArticleParser.php
@@ -0,0 +1,8 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LogseqGem;
+
+class ArticleParser extends Parser {
+}
diff --git a/src/GemlogParser.php b/src/GemlogParser.php
new file mode 100644
index 0000000..75c5eaa
--- /dev/null
+++ b/src/GemlogParser.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LogseqGem;
+
+use League\CommonMark\Node\Block\Document;
+use League\CommonMark\Node\Inline\Text;
+
+class GemlogParser extends Parser {
+    public function getTitles() {
+        $titles = [];
+
+        foreach ($this->document->iterator() as $node) {
+            if (!$node instanceof Text) {
+                continue;
+            }
+
+            $text = $node->getLiteral();
+
+            if (substr($text, 0, 2) !== '[[' && substr($text, -2) !== ']]') {
+                continue;
+            }
+
+            $titles[] = substr($text, 2, -2);
+        }
+
+        return $titles;
+    }
+}
diff --git a/src/Parser.php b/src/Parser.php
index 13c1ac5..e7a9b22 100644
--- a/src/Parser.php
+++ b/src/Parser.php
@@ -4,6 +4,8 @@ declare(strict_types=1);
 
 namespace LogseqGem;
 
+use League\CommonMark\Node\Block\Document;
+
 use League\CommonMark\Parser\MarkdownParser;
 use League\CommonMark\Environment\Environment;
 use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;
@@ -11,13 +13,17 @@ use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;
 abstract class Parser {
     private MarkdownParser $parser;
 
+    protected Document $document;
+
     public function __construct() {
         $environment = new Environment();
         $environment->addExtension(new CommonMarkCoreExtension());
         $this->parser = new MarkdownParser($environment);
     }
 
-    public function parse(string $input) {
-        return $this->parser->parse($input);
+    public function load(string $path) {
+        $markdown = file_get_contents($path);
+        $this->document = $this->parser->parse($markdown);
+        return $this->document;
     }
 }
diff --git a/tests/GemlogParserTest.php b/tests/GemlogParserTest.php
new file mode 100644
index 0000000..7f141b6
--- /dev/null
+++ b/tests/GemlogParserTest.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LogseqGem\Tests;
+
+use PHPUnit\Framework\TestCase;
+use org\bovigo\vfs\vfsStream;
+use org\bovigo\vfs\vfsStreamDirectory;
+
+use League\CommonMark\Node\Block\Document;
+use LogseqGem\GemlogParser;
+
+class GemlogParserTest extends TestCase {
+    private vfsStreamDirectory $root;
+
+    public function setUp(): void {
+        $this->root = vfsStream::setup();
+    }
+
+    public function testLoad() {
+        vfsStream::newFile('Gemlog.md')
+            ->withContent("- [[Test link]]\n- [[Link 2]]\n-")
+            ->at($this->root);
+        $parser = new GemlogParser;
+        $parser->load(vfsStream::url('root/Gemlog.md'));
+        $this->assertSame(['Test link', 'Link 2'], $parser->getTitles());
+    }
+}
diff --git a/tests/ParserTest.php b/tests/ParserTest.php
index cdc13c8..e1b2b2a 100644
--- a/tests/ParserTest.php
+++ b/tests/ParserTest.php
@@ -5,14 +5,26 @@ declare(strict_types=1);
 namespace LogseqGem\Tests;
 
 use PHPUnit\Framework\TestCase;
-use LogseqGem\Parser;
+use org\bovigo\vfs\vfsStream;
+use org\bovigo\vfs\vfsStreamDirectory;
 
 use League\CommonMark\Node\Block\Document;
 
+use LogseqGem\Parser;
+
 class ParserTest extends TestCase {
+    private vfsStreamDirectory $root;
+
+    public function setUp(): void {
+        $this->root = vfsStream::setup();
+    }
+
     public function testParse() {
+        vfsStream::newFile('test.md')
+            ->withContent("this is a test **markdown** file")
+            ->at($this->root);
         $parser = $this->getMockForAbstractClass(Parser::class);
-        $document = $parser->parse('**foo**');
+        $document = $parser->load(vfsStream::url('root/test.md'));
         $this->assertInstanceOf(Document::class, $document);
     }
 }