Introduce PageDao interface. Move file scanning logic to FilePageDao.

.gitignore

@@ -20,4 +20,7 @@ themes/*
 !themes/default/*
 
 # User config
-config.php
+config.php
+*.iml
+*.sublime-*
+.idea

lib/FilePageDao.php

@@ -0,0 +1,86 @@
+<?php
+
+class FilePageDao implements PageDao
+{
+    /**
+     * @var Pico
+     */
+    private $pico;
+
+    /**
+     * @param Pico $pico
+     */
+    function __construct($pico)
+    {
+        $this->pico = $pico;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    function get_pages($base_url, $order_by = 'alpha', $order = 'asc', $meta_max_length = 2048, $excerpt_length = 50)
+    {
+        global $config;
+
+        $pages = $this->pico->get_files(CONTENT_DIR, CONTENT_EXT);
+        $sorted_pages = array();
+        $date_id = 0;
+        foreach ($pages as $key => $page) {
+            // Skip 404
+            if (basename($page) == '404' . CONTENT_EXT) {
+                unset($pages[$key]);
+                continue;
+            }
+
+            // Ignore Emacs (and Nano) temp files
+            if (in_array(substr($page, -1), array('~', '#'))) {
+                unset($pages[$key]);
+                continue;
+            }
+            // Get title and format $page
+            $page_content = file_get_contents($page, NULL, NULL, 0, $meta_max_length);
+            $page_meta = $this->pico->read_file_meta($page_content);
+            $page_content = $this->pico->parse_content($page_content);
+            $url = str_replace(CONTENT_DIR, $base_url . '/', $page);
+            $url = str_replace('index' . CONTENT_EXT, '', $url);
+            $url = str_replace(CONTENT_EXT, '', $url);
+            $data = array(
+                'title' => isset($page_meta['title']) ? $page_meta['title'] : '',
+                'url' => $url,
+                'author' => isset($page_meta['author']) ? $page_meta['author'] : '',
+                'date' => isset($page_meta['date']) ? $page_meta['date'] : '',
+                'date_formatted' => isset($page_meta['date']) ? date($config['date_format'], strtotime($page_meta['date'])) : '',
+                'content' => $page_content,
+                'excerpt' => $this->limit_words(strip_tags($page_content), $excerpt_length),
+                'last_modified' => new DateTime('@' . filemtime($page))
+            );
+
+            // Extend the data provided with each page by hooking into the data array
+            $this->pico->run_hooks('get_page_data', array(&$data, $page_meta));
+
+            if ($order_by == 'date' && isset($page_meta['date'])) {
+                $sorted_pages[$page_meta['date'] . $date_id] = $data;
+                $date_id++;
+            } else $sorted_pages[] = $data;
+        }
+
+        if ($order == 'desc') krsort($sorted_pages);
+        else ksort($sorted_pages);
+
+        return $sorted_pages;
+    }
+
+    /**
+     * Helper function to limit the words in a string
+     *
+     * @param string $string the given string
+     * @param int $word_limit the number of words to limit to
+     * @return string the limited string
+     */
+    private function limit_words($string, $word_limit)
+    {
+        $words = explode(' ', $string);
+        return trim(implode(' ', array_splice($words, 0, $word_limit))) . '...';
+    }
+
+}

lib/pico.php

@@ -1,5 +1,21 @@
 <?php
-use \Michelf\MarkdownExtra;
+
+use Michelf\MarkdownExtra;
+
+interface PageDao
+{
+    /**
+     * Returns a list of pages.
+     *
+     * @param string $base_url the base URL of the site
+     * @param string $order_by order by "alpha" or "date"
+     * @param string $order order "asc" or "desc"
+     * @param int $meta_max_length Maximum length of page meta section
+     * @param int $excerpt_length Maximum length of the excerpt in words
+     * @return array $sorted_pages an array of pages
+     */
+    function get_pages($base_url, $order_by = 'alpha', $order = 'asc', $meta_max_length = 2048, $excerpt_length = 50);
+}
 
 /**
  * Pico
@@ -9,346 +25,293 @@ use \Michelf\MarkdownExtra;
  * @license http://opensource.org/licenses/MIT
  * @version 0.7
  */
-class Pico {
-
-	private $plugins;
-
-	/**
-	 * The constructor carries out all the processing in Pico.
-	 * Does URL routing, Markdown processing and Twig processing.
-	 */
-	public function __construct()
-	{
-		// Load plugins
-		$this->load_plugins();
-		$this->run_hooks('plugins_loaded');
-		
-		// Get request url and script url
-		$url = '';
-		$request_url = (isset($_SERVER['REQUEST_URI'])) ? $_SERVER['REQUEST_URI'] : '';
-		$script_url  = (isset($_SERVER['PHP_SELF'])) ? $_SERVER['PHP_SELF'] : '';
-
-		// Get our url path and trim the / of the left and the right
-		if($request_url != $script_url) $url = trim(preg_replace('/'. str_replace('/', '\/', str_replace('index.php', '', $script_url)) .'/', '', $request_url, 1), '/');
-		$url = preg_replace('/\?.*/', '', $url); // Strip query string
-		$this->run_hooks('request_url', array(&$url));
-
-		// Get the file path
-		if($url) $file = CONTENT_DIR . $url;
-		else $file = CONTENT_DIR .'index';
-
-		// Load the file
-		if(is_dir($file)) $file = CONTENT_DIR . $url .'/index'. CONTENT_EXT;
-		else $file .= CONTENT_EXT;
-
-		$this->run_hooks('before_load_content', array(&$file));
-		if(file_exists($file)){
-			$content = file_get_contents($file);
-		} else {
-			$this->run_hooks('before_404_load_content', array(&$file));
-			$content = file_get_contents(CONTENT_DIR .'404'. CONTENT_EXT);
-			header($_SERVER['SERVER_PROTOCOL'].' 404 Not Found');
-			$this->run_hooks('after_404_load_content', array(&$file, &$content));
-		}
-		$this->run_hooks('after_load_content', array(&$file, &$content));
-		
-		// Load the settings
-		$settings = $this->get_config();
-		$this->run_hooks('config_loaded', array(&$settings));
-
-		$meta = $this->read_file_meta($content);
-		$this->run_hooks('file_meta', array(&$meta));
-		$content = $this->parse_content($content);
-		$this->run_hooks('content_parsed', array(&$content));
-		
-		// Get all the pages
-		$pages = $this->get_pages($settings['base_url'], $settings['pages_order_by'], $settings['pages_order'], $settings['excerpt_length']);
-		$prev_page = array();
-		$current_page = array();
-		$next_page = array();
-		while($current_page = current($pages)){
-			if((isset($meta['title'])) && ($meta['title'] == $current_page['title'])){
-				break;
-			}
-			next($pages);
-		}
-		$prev_page = next($pages);
-		prev($pages);
-		$next_page = prev($pages);
-		$this->run_hooks('get_pages', array(&$pages, &$current_page, &$prev_page, &$next_page));
-
-		// Load the theme
-		$this->run_hooks('before_twig_register');
-		Twig_Autoloader::register();
-		$loader = new Twig_Loader_Filesystem(THEMES_DIR . $settings['theme']);
-		$twig = new Twig_Environment($loader, $settings['twig_config']);
-		$twig->addExtension(new Twig_Extension_Debug());
-		$twig_vars = array(
-			'config' => $settings,
-			'base_dir' => rtrim(ROOT_DIR, '/'),
-			'base_url' => $settings['base_url'],
-			'theme_dir' => THEMES_DIR . $settings['theme'],
-			'theme_url' => $settings['base_url'] .'/'. basename(THEMES_DIR) .'/'. $settings['theme'],
-			'site_title' => $settings['site_title'],
-			'meta' => $meta,
-			'content' => $content,
-			'pages' => $pages,
-			'prev_page' => $prev_page,
-			'current_page' => $current_page,
-			'next_page' => $next_page,
-			'is_front_page' => $url ? false : true,
-		);
+class Pico
+{
+    /**
+     * @var array
+     */
+    private $plugins;
+    /**
+     * @var PageDao
+     */
+    private $page_dao;
+
+    /**
+     * The constructor carries out all the processing in Pico.
+     * Does URL routing, Markdown processing and Twig processing.
+     */
+    public function __construct()
+    {
+        // Load plugins
+        $this->load_plugins();
+        if (!isset($this->page_dao)) {
+            // If plugin not found - fallback to FilePageDao
+            @require_once(LIB_DIR . 'FilePageDao.php');
+            $this->page_dao = new FilePageDao($this);
+        }
+
+        $this->run_hooks('plugins_loaded');
+
+        // Get request url and script url
+        $url = '';
+        $request_url = (isset($_SERVER['REQUEST_URI'])) ? $_SERVER['REQUEST_URI'] : '';
+        $script_url = (isset($_SERVER['PHP_SELF'])) ? $_SERVER['PHP_SELF'] : '';
+
+        // Get our url path and trim the / of the left and the right
+        if ($request_url != $script_url) $url = trim(preg_replace('/' . str_replace('/', '\/', str_replace('index.php', '', $script_url)) . '/', '', $request_url, 1), '/');
+        $url = preg_replace('/\?.*/', '', $url); // Strip query string
+        $this->run_hooks('request_url', array(&$url));
+
+        // Get the file path
+        if ($url) $file = CONTENT_DIR . $url;
+        else $file = CONTENT_DIR . 'index';
+
+        // Load the file
+        if (is_dir($file)) $file = CONTENT_DIR . $url . '/index' . CONTENT_EXT;
+        else $file .= CONTENT_EXT;
+
+        $this->run_hooks('before_load_content', array(&$file));
+        if (file_exists($file)) {
+            $content = file_get_contents($file);
+        } else {
+            $this->run_hooks('before_404_load_content', array(&$file));
+            $content = file_get_contents(CONTENT_DIR . '404' . CONTENT_EXT);
+            header($_SERVER['SERVER_PROTOCOL'] . ' 404 Not Found');
+            $this->run_hooks('after_404_load_content', array(&$file, &$content));
+        }
+        $this->run_hooks('after_load_content', array(&$file, &$content));
+
+        // Load the settings
+        $settings = $this->get_config();
+        $this->run_hooks('config_loaded', array(&$settings));
+
+        $meta = $this->read_file_meta($content);
+        $this->run_hooks('file_meta', array(&$meta));
+        $content = $this->parse_content($content);
+        $this->run_hooks('content_parsed', array(&$content));
+
+        // Get all the pages
+        $pages = $this->page_dao->get_pages(
+            $settings['base_url'],
+            $settings['pages_order_by'],
+            $settings['pages_order'],
+            $settings['excerpt_length']);
+        $prev_page = array();
+        $current_page = array();
+        $next_page = array();
+        while ($current_page = current($pages)) {
+            if ((isset($meta['title'])) && ($meta['title'] == $current_page['title'])) {
+                break;
+            }
+            next($pages);
+        }
+        $prev_page = next($pages);
+        prev($pages);
+        $next_page = prev($pages);
+        $this->run_hooks('get_pages', array(&$pages, &$current_page, &$prev_page, &$next_page));
+
+        // Load the theme
+        $this->run_hooks('before_twig_register');
+        Twig_Autoloader::register();
+        $loader = new Twig_Loader_Filesystem(THEMES_DIR . $settings['theme']);
+        $twig = new Twig_Environment($loader, $settings['twig_config']);
+        $twig->addExtension(new Twig_Extension_Debug());
+        $twig_vars = array(
+            'config' => $settings,
+            'base_dir' => rtrim(ROOT_DIR, '/'),
+            'base_url' => $settings['base_url'],
+            'theme_dir' => THEMES_DIR . $settings['theme'],
+            'theme_url' => $settings['base_url'] . '/' . basename(THEMES_DIR) . '/' . $settings['theme'],
+            'site_title' => $settings['site_title'],
+            'meta' => $meta,
+            'content' => $content,
+            'pages' => $pages,
+            'prev_page' => $prev_page,
+            'current_page' => $current_page,
+            'next_page' => $next_page,
+            'is_front_page' => $url ? false : true,
+        );
         // use a custom template if specified Template: [filename] in page meta e.g. Template: spesh to try and use spesh.html in theme folder
         $template = ((isset($meta['template']) && file_exists($twig_vars['theme_dir'] . '/' . $meta['template'] . $settings['template_ext'])) ? $meta['template'] . $settings['template_ext'] : 'index' . $settings['template_ext']);
 
-		$this->run_hooks('before_render', array(&$twig_vars, &$twig));
+        $this->run_hooks('before_render', array(&$twig_vars, &$twig));
         $output = $twig->render($template, $twig_vars);
-		$this->run_hooks('after_render', array(&$output));
-		echo $output;
-	}
-	
-	/**
-	 * Load any plugins
-	 */
-	private function load_plugins()
-	{
-		$this->plugins = array();
-		$plugins = $this->get_files(PLUGINS_DIR, '.php');
-		if(!empty($plugins)){
-			foreach($plugins as $plugin){
-				include_once($plugin);
-				$plugin_name = preg_replace("/\\.[^.\\s]{3}$/", '', basename($plugin));
-				if(class_exists($plugin_name)){
-					$obj = new $plugin_name;
-					$this->plugins[] = $obj;
-				}
-			}
-		}
-	}
-
-	/**
-	 * Parses the content using Markdown
-	 *
-	 * @param string $content the raw txt content
-	 * @return string $content the Markdown formatted content
-	 */
-    private function parse_content(&$content)
-	{
-		$content = preg_replace('#/\*.+?\*/#s', '', $content); // Remove comments and meta
-		$content = str_replace('%base_url%', $this->base_url(), $content);
-		$content = MarkdownExtra::defaultTransform($content);
-
-		return $content;
-	}
-
-	/**
-     * Parses the file meta from the txt file header.
-     * Meta keys are converted to lowercase automatically.
-	 *
-	 * @param string $content the raw txt content
-	 * @return array $headers an array of meta values
-	 */
-	private function read_file_meta($content)
-	{
-		global $config;
-		
-		$headers = array(
-			'title'       	=> 'Title',
-			'description' 	=> 'Description',
-			'author' 		=> 'Author',
-			'date' 			=> 'Date',
-			'robots'     	=> 'Robots'
-		);
-
-		// Add support for custom headers by hooking into the headers array
-		$this->run_hooks('before_read_file_meta', array(&$headers));
-
-	 	foreach ($headers as $field => $regex){
-			if (preg_match('/^[ \t\/*#@]*' . preg_quote($regex, '/') . ':(.*)$/mi', $content, $match) && $match[1]){
-				$headers[ $field ] = trim(preg_replace("/\s*(?:\*\/|\?>).*/", '', $match[1]));
-			} else {
-				$headers[ $field ] = '';
-			}
-		}
-		
-		if(isset($headers['date'])) $headers['date_formatted'] = date($config['date_format'], strtotime($headers['date']));
-
-		return $headers;
-	}
-
-	/**
-	 * Loads the config
-	 *
-	 * @return array $config an array of config values
-	 */
-	private function get_config()
-	{
-		global $config;
-		@include_once(ROOT_DIR .'config.php');
-
-		$defaults = array(
-			'site_title' => 'Pico',
-			'base_url' => $this->base_url(),
-			'theme' => 'default',
-			'date_format' => 'jS M Y',
-			'twig_config' => array('cache' => false, 'autoescape' => false, 'debug' => false),
-			'pages_order_by' => 'alpha',
-			'pages_order' => 'asc',
+        $this->run_hooks('after_render', array(&$output));
+        echo $output;
+    }
+
+    /**
+     * Load any plugins
+     */
+    private function load_plugins()
+    {
+        $this->plugins = array();
+        $plugins = $this->get_files(PLUGINS_DIR, '.php');
+        if (!empty($plugins)) {
+            foreach ($plugins as $plugin) {
+                include_once($plugin);
+                $plugin_name = preg_replace("/\\.[^.\\s]{3}$/", '', basename($plugin));
+                if (class_exists($plugin_name)) {
+                    $obj = new $plugin_name;
+                    $this->plugins[] = $obj;
+
+                    if ($obj instanceof PageDao) {
+                        $this->page_dao = $obj;
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Helper function to recusively get all files in a directory
+     *
+     * @param string $directory start directory
+     * @param string $ext optional limit to file extensions
+     * @return array the matched files
+     */
+    static function get_files($directory, $ext = '')
+    {
+        $array_items = array();
+        if ($handle = opendir($directory)) {
+            while (false !== ($file = readdir($handle))) {
+                if (preg_match("/^(^\.)/", $file) === 0) {
+                    if (is_dir($directory . "/" . $file)) {
+                        $array_items = array_merge($array_items, self::get_files($directory . "/" . $file, $ext));
+                    } else {
+                        $file = $directory . "/" . $file;
+                        if (!$ext || strstr($file, $ext)) $array_items[] = preg_replace("/\/\//si", "/", $file);
+                    }
+                }
+            }
+            closedir($handle);
+        }
+        return $array_items;
+    }
+
+    /**
+     * Processes any hooks and runs them
+     *
+     * @param string $hook_id the ID of the hook
+     * @param array $args optional arguments
+     */
+    function run_hooks($hook_id, $args = array())
+    {
+        if (!empty($this->plugins)) {
+            foreach ($this->plugins as $plugin) {
+                if (is_callable(array($plugin, $hook_id))) {
+                    call_user_func_array(array($plugin, $hook_id), $args);
+                }
+            }
+        }
+    }
+
+    /**
+     * Loads the config
+     *
+     * @return array $config an array of config values
+     */
+    private function get_config()
+    {
+        global $config;
+        @include_once(ROOT_DIR . 'config.php');
+
+        $defaults = array(
+            'site_title' => 'Pico',
+            'base_url' => $this->base_url(),
+            'theme' => 'default',
+            'date_format' => 'jS M Y',
+            'twig_config' => array('cache' => false, 'autoescape' => false, 'debug' => false),
+            'pages_order_by' => 'alpha',
+            'pages_order' => 'asc',
             'excerpt_length' => 50,
             'template_ext' => '.html'
-		);
-
-		if(is_array($config)) $config = array_merge($defaults, $config);
-		else $config = $defaults;
-
-		return $config;
-	}
-	
-	/**
-	 * Get a list of pages
-	 *
-	 * @param string $base_url the base URL of the site
-	 * @param string $order_by order by "alpha" or "date"
-	 * @param string $order order "asc" or "desc"
-	 * @return array $sorted_pages an array of pages
-	 */
-    private function get_pages($base_url, $order_by = 'alpha', $order = 'asc', $meta_max_length = 2048, $excerpt_length = 50)
-	{
-		global $config;
-		
-		$pages = $this->get_files(CONTENT_DIR, CONTENT_EXT);
-		$sorted_pages = array();
-		$date_id = 0;
-		foreach($pages as $key=>$page){
-			// Skip 404
-			if(basename($page) == '404'. CONTENT_EXT){
-				unset($pages[$key]);
-				continue;
-			}
-
-			// Ignore Emacs (and Nano) temp files
-			if (in_array(substr($page, -1), array('~','#'))) {
-				unset($pages[$key]);
-				continue;
-			}			
-			// Get title and format $page
-            $page_content = file_get_contents($page, NULL, NULL, 0, $meta_max_length);
-			$page_meta = $this->read_file_meta($page_content);
-			$page_content = $this->parse_content($page_content);
-			$url = str_replace(CONTENT_DIR, $base_url .'/', $page);
-			$url = str_replace('index'. CONTENT_EXT, '', $url);
-			$url = str_replace(CONTENT_EXT, '', $url);
-			$data = array(
-				'title' => isset($page_meta['title']) ? $page_meta['title'] : '',
-				'url' => $url,
-				'author' => isset($page_meta['author']) ? $page_meta['author'] : '',
-				'date' => isset($page_meta['date']) ? $page_meta['date'] : '',
-				'date_formatted' => isset($page_meta['date']) ? date($config['date_format'], strtotime($page_meta['date'])) : '',
-				'content' => $page_content,
-				'excerpt' => $this->limit_words(strip_tags($page_content), $excerpt_length),
-                'last_modified' => new DateTime('@' . filemtime($page))
-			);
-
-			// Extend the data provided with each page by hooking into the data array
-			$this->run_hooks('get_page_data', array(&$data, $page_meta));
-
-			if($order_by == 'date' && isset($page_meta['date'])){
-				$sorted_pages[$page_meta['date'].$date_id] = $data;
-				$date_id++;
-			}
-			else $sorted_pages[] = $data;
-		}
-		
-		if($order == 'desc') krsort($sorted_pages);
-		else ksort($sorted_pages);
-		
-		return $sorted_pages;
-	}
-	
-	/**
-	 * Processes any hooks and runs them
-	 *
-	 * @param string $hook_id the ID of the hook
-	 * @param array $args optional arguments
-	 */
-	private function run_hooks($hook_id, $args = array())
-	{
-		if(!empty($this->plugins)){
-			foreach($this->plugins as $plugin){
-				if(is_callable(array($plugin, $hook_id))){
-					call_user_func_array(array($plugin, $hook_id), $args);
-				}
-			}
-		}
-	}
-
-	/**
-	 * Helper function to work out the base URL
-	 *
-	 * @return string the base url
-	 */
-	private function base_url()
-	{
-		global $config;
-		if(isset($config['base_url']) && $config['base_url']) return $config['base_url'];
-
-		$url = '';
-		$request_url = (isset($_SERVER['REQUEST_URI'])) ? $_SERVER['REQUEST_URI'] : '';
-		$script_url  = (isset($_SERVER['PHP_SELF'])) ? $_SERVER['PHP_SELF'] : '';
-		if($request_url != $script_url) $url = trim(preg_replace('/'. str_replace('/', '\/', str_replace('index.php', '', $script_url)) .'/', '', $request_url, 1), '/');
-
-		$protocol = $this->get_protocol();
-		return rtrim(str_replace($url, '', $protocol . "://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']), '/');
-	}
-
-	/**
-	 * Tries to guess the server protocol. Used in base_url()
-	 *
-	 * @return string the current protocol
-	 */
-	private function get_protocol()
-	{
-		preg_match("|^HTTP[S]?|is",$_SERVER['SERVER_PROTOCOL'],$m);
-		return strtolower($m[0]);
-	}
-	     
-	/**
-	 * Helper function to recusively get all files in a directory
-	 *
-	 * @param string $directory start directory
-	 * @param string $ext optional limit to file extensions
-	 * @return array the matched files
-	 */ 
-	private function get_files($directory, $ext = '')
-	{
-	    $array_items = array();
-	    if($handle = opendir($directory)){
-	        while(false !== ($file = readdir($handle))){
-	            if(preg_match("/^(^\.)/", $file) === 0){
-	                if(is_dir($directory. "/" . $file)){
-	                    $array_items = array_merge($array_items, $this->get_files($directory. "/" . $file, $ext));
-	                } else {
-	                    $file = $directory . "/" . $file;
-	                    if(!$ext || strstr($file, $ext)) $array_items[] = preg_replace("/\/\//si", "/", $file);
-	                }
-	            }
-	        }
-	        closedir($handle);
-	    }
-	    return $array_items;
-	}
-	
-	/**
-	 * Helper function to limit the words in a string
-	 *
-	 * @param string $string the given string
-	 * @param int $word_limit the number of words to limit to
-	 * @return string the limited string
-	 */ 
-	private function limit_words($string, $word_limit)
-	{
-		$words = explode(' ',$string);
-		return trim(implode(' ', array_splice($words, 0, $word_limit))) .'...';
-	}
+        );
+
+        if (is_array($config)) $config = array_merge($defaults, $config);
+        else $config = $defaults;
+
+        return $config;
+    }
 
+    /**
+     * Helper function to work out the base URL
+     *
+     * @return string the base url
+     */
+    private function base_url()
+    {
+        global $config;
+        if (isset($config['base_url']) && $config['base_url']) return $config['base_url'];
+
+        $url = '';
+        $request_url = (isset($_SERVER['REQUEST_URI'])) ? $_SERVER['REQUEST_URI'] : '';
+        $script_url = (isset($_SERVER['PHP_SELF'])) ? $_SERVER['PHP_SELF'] : '';
+        if ($request_url != $script_url) $url = trim(preg_replace('/' . str_replace('/', '\/', str_replace('index.php', '', $script_url)) . '/', '', $request_url, 1), '/');
+
+        $protocol = $this->get_protocol();
+        return rtrim(str_replace($url, '', $protocol . "://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']), '/');
+    }
+
+    /**
+     * Tries to guess the server protocol. Used in base_url()
+     *
+     * @return string the current protocol
+     */
+    private function get_protocol()
+    {
+        preg_match("|^HTTP[S]?|is", $_SERVER['SERVER_PROTOCOL'], $m);
+        return strtolower($m[0]);
+    }
+
+    /**
+     * Parses the file meta from the txt file header.
+     * Meta keys are converted to lowercase automatically.
+     *
+     * @param string $content the raw txt content
+     * @return array $headers an array of meta values
+     */
+    function read_file_meta($content)
+    {
+        global $config;
+
+        $headers = array(
+            'title' => 'Title',
+            'description' => 'Description',
+            'author' => 'Author',
+            'date' => 'Date',
+            'robots' => 'Robots'
+        );
+
+        // Add support for custom headers by hooking into the headers array
+        $this->run_hooks('before_read_file_meta', array(&$headers));
+
+        foreach ($headers as $field => $regex) {
+            if (preg_match('/^[ \t\/*#@]*' . preg_quote($regex, '/') . ':(.*)$/mi', $content, $match) && $match[1]) {
+                $headers[$field] = trim(preg_replace("/\s*(?:\*\/|\?>).*/", '', $match[1]));
+            } else {
+                $headers[$field] = '';
+            }
+        }
+
+        if (isset($headers['date'])) $headers['date_formatted'] = date($config['date_format'], strtotime($headers['date']));
+
+        return $headers;
+    }
+
+    /**
+     * Parses the content using Markdown
+     *
+     * @param string $content the raw txt content
+     * @return string $content the Markdown formatted content
+     */
+    function parse_content(&$content)
+    {
+        $content = preg_replace('#/\*.+?\*/#s', '', $content); // Remove comments and meta
+        $content = str_replace('%base_url%', $this->base_url(), $content);
+        $content = MarkdownExtra::defaultTransform($content);
+
+        return $content;
+    }
 }
+