implement Helper methods

README.md

@@ -173,3 +173,38 @@ var_dump (
     )
 )
 ```
+
+### Helper
+
+Useful methods to minify controller codebase
+
+```
+$helper = new \Yggverse\Gemini\Dokuwiki\Helper(
+    new \Yggverse\Gemini\Dokuwiki\Filesystem(),
+    new \Yggverse\Gemini\Dokuwiki\Reader()
+);
+```
+
+#### Filesystem::getChildrenSectionLinksByUri
+
+Return simple array of children section links in Gemini format
+
+```
+var_dump (
+    $helper->getChildrenSectionLinksByUri(
+        'hello:world'
+    )
+)
+```
+
+#### Filesystem::getChildrenPageLinksByUri
+
+Return simple array of children page links in Gemini format
+
+```
+var_dump (
+    $helper->getChildrenPageLinksByUri(
+        'hello:world'
+    )
+)
+```

src/Dokuwiki/Helper.php

@@ -0,0 +1,141 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Gemini\Dokuwiki;
+
+class Helper
+{
+    private \Yggverse\Gemini\Dokuwiki\Filesystem $_filesystem;
+    private \Yggverse\Gemini\Dokuwiki\Reader $_reader;
+
+    public function __construct(
+        \Yggverse\Gemini\Dokuwiki\Filesystem $filesystem,
+        \Yggverse\Gemini\Dokuwiki\Reader $reader
+    ) {
+        $this->_filesystem = $filesystem;
+        $this->_reader = $reader;
+    }
+
+    public function getChildrenSectionLinksByUri(?string $uri = ''): array
+    {
+        $sections = [];
+
+        if ($directory = $this->_filesystem->getDirectoryPathByUri($uri))
+        {
+            foreach ((array) $this->_filesystem->getTree() as $path => $files)
+            {
+                if (str_starts_with($path, $directory) && $path != $directory)
+                {
+                    // Init link name
+                    $h1 = null;
+
+                    // Init this directory URI
+                    $thisUri = $this->_filesystem->getDirectoryUriByPath(
+                        $path
+                    );
+
+                    // Skip sections deeper this level
+                    if (substr_count($thisUri, ':') > ($uri ? substr_count($uri, ':') + 1 : 0))
+                    {
+                        continue;
+                    }
+
+                    // Get section names
+                    $segments = [];
+
+                    foreach ((array) explode(':', $thisUri) as $segment)
+                    {
+                        $segments[] = $segment;
+
+                        // Find section index if exists
+                        if ($file = $this->_filesystem->getPagePathByUri(implode(':', $segments) . ':' . $segment))
+                        {
+                            $h1 = $this->_reader->getH1(
+                                $this->_reader->toGemini(
+                                    file_get_contents(
+                                        $file
+                                    )
+                                )
+                            );
+                        }
+
+                        // Find section page if exists
+                        else if ($file = $this->_filesystem->getPagePathByUri(implode(':', $segments)))
+                        {
+                            $h1 = $this->_reader->getH1(
+                                $this->_reader->toGemini(
+                                    file_get_contents(
+                                        $file
+                                    )
+                                )
+                            );
+                        }
+
+                        // Reset title of undefined segment
+                        else
+                        {
+                            $h1 = null;
+                        }
+                    }
+
+                    // Register section link
+                    $sections[] = sprintf(
+                        '=> /%s %s',
+                        $thisUri,
+                        $h1
+                    );
+                }
+            }
+        }
+
+        // Keep unique
+        $sections = array_unique(
+            $sections
+        );
+
+        // Sort asc
+        sort(
+            $sections
+        );
+
+        return $sections;
+    }
+
+    public function getChildrenPageLinksByUri(?string $uri = ''): array
+    {
+        $pages = [];
+
+        if ($directory = $this->_filesystem->getDirectoryPathByUri($uri))
+        {
+            foreach ((array) $this->_filesystem->getPagePathsByPath($directory) as $file)
+            {
+                $pages[] = sprintf(
+                    '=> /%s %s',
+                    $this->_filesystem->getPageUriByPath(
+                        $file
+                    ),
+                    $this->_reader->getH1(
+                        $this->_reader->toGemini(
+                            file_get_contents(
+                                $file
+                            )
+                        )
+                    )
+                );
+            }
+        }
+
+        // Keep unique
+        $pages = array_unique(
+            $pages
+        );
+
+        // Sort asc
+        sort(
+            $pages
+        );
+
+        return $pages;
+    }
+}

src/Dokuwiki/Reader.php

@@ -60,7 +60,7 @@ class Reader
         '/\[\[doku>([^\]]+)\]\]/i' => '$1( https://www.dokuwiki.org/$1 )',
 
         /// Index
-        /// Server-side implementation: https://github.com/YGGverse/dokuwiki-gemini-server
+        /// Useful with src/Dokuwiki/Helper.php
         '/\{\{indexmenu>:([^\}]+)\}\}/i' => '',
         '/\{\{indexmenu_n>[\d]+\}\}/i' => '',