Backend, frontend and 404 handlers partially implemented.

* Backend layout done.
* Frontend theoretically done (untested).
* 404 handler done
* Added textprocessors.php

11 files changed, 1175 insertions, 19 deletions

diff --git a/ratatoeskr/backend/main.php b/ratatoeskr/backend/main.php
index cd7bb35..9767cb4 100644
--- a/ratatoeskr/backend/main.php
+++ b/ratatoeskr/backend/main.php
@@ -12,18 +12,23 @@
 require_once(dirname(__FILE__) . "/../sys/models.php");
 require_once(dirname(__FILE__) . "/../sys/pwhash.php");
 
+$admin_grp = Group::by_name("admins");
+
 $backend_subactions = url_action_subactions(array(
-	"_default" => url_action_alias(array("login")),
+	"_index" => url_action_alias(array("login")),
+	"index" => url_action_alias(array("login")),
+	/* _prelude guarantees that the user is logged in properly, so we do not have to care about that later. */
 	"_prelude" => function(&$data, $url_now, &$url_next)
 	{
-		global $ratatoeskr_settings;
+		global $ratatoeskr_settings, $admin_grp, $ste;
+		
 		/* Check authentification */
-		if(isset($_SESSION["uid"]))
+		if(isset($_SESSION["ratatoeskr_uid"]))
 		{
 			try
 			{
-				$user = User::by_id($_SESSION["uid"]);
-				if($user->pwhash == $_SESSION["pwhash"])
+				$user = User::by_id($_SESSION["ratatoeskr_uid"]);
+				if(($user->pwhash == $_SESSION["ratatoeskr_pwhash"]) and $user->member_of($admin_grp))
 				{
 					if(empty($user->language))
 					{
@@ -34,10 +39,12 @@ $backend_subactions = url_action_subactions(array(
 					
 					if($url_next[0] == "login")
 						$url_next = array("content", "write");
+					$data["user"] = $user;
+					$ste->vars["user"] = array("name" => $user->username);
 					return; /* Authentification successful, continue  */
 				}
 				else
-					unset($_SESSION["uid"]);
+					unset($_SESSION["ratatoeskr_uid"]);
 			}
 			catch(DoesNotExistError $e)
 			{
@@ -48,10 +55,9 @@ $backend_subactions = url_action_subactions(array(
 		/* If we are here, user is not logged in... */
 		$url_next = array("login");
 	},
-	"index" => url_action_alias(array("login")),
 	"login" => url_action_simple(function($data)
 	{
-		global $ste;
+		global $ste, $admin_grp;
 		if(!empty($_POST["user"]))
 		{
 			try
@@ -59,24 +65,51 @@ $backend_subactions = url_action_subactions(array(
 				$user = User::by_name($_POST["user"]);
 				if(!PasswordHash::validate($_POST["password"], $user->pwhash))
 					throw new Exception();
-				$_SESSION["uid"]    = $user->get_id();
-				$_SESSION["pwhash"] = $user->pwhash;
+				if(!$user->member_of($admin_grp))
+					throw new Exception();
+				$_SESSION["ratatoeskr_uid"]    = $user->get_id();
+				$_SESSION["ratatoeskr_pwhash"] = $user->pwhash;
 			}
 			catch(Exception $e)
 			{
 				$ste->vars["login_failed"] = True;
 			}
 			
-			/* Login successful. Now redirect... */
+			/* Login successful. */
+			$data["user"] = $user;
+			$ste->vars["user"] = array("name" => $user->username);
 			throw new Redirect(array("content", "write"));
 		}
 		
 		echo $ste->exectemplate("systemtemplates/backend_login.html");
 	}),
-	"content" => url_action_simple(function($data)
+	"logout" => url_action_simple(function($data)
 	{
-		print "hi";
-	})
+		echo "foo";
+		unset($_SESSION["ratatoeskr_uid"]);
+		unset($_SESSION["ratatoeskr_pwhash"]);
+		throw new Redirect(array("login"));
+	}),
+	"content" => url_action_subactions(array(
+		"write" => function(&$data, $url_now, &$url_next)
+		{
+			global $ste, $translation;
+			
+			$article = array_slice($url_next, 0);
+			$url_next = array();
+			
+			$ste->vars["section"] = "content";
+			$ste->vars["submenu"] = "newarticle";
+			
+			if(empty($article))
+			{
+				/* New Article */
+				$ste->vars["pagetitle"] = $translation["new_article"];
+			}
+			
+			echo $ste->exectemplate("systemtemplates/content_write.html");
+		}
+	))
 ));
 
 ?>
diff --git a/ratatoeskr/cms_style/images/dead_emoticon.png b/ratatoeskr/cms_style/images/dead_emoticon.png
new file mode 100644
index 0000000..1a07509
--- /dev/null
+++ b/ratatoeskr/cms_style/images/dead_emoticon.png
diff --git a/ratatoeskr/cms_style/layout.css b/ratatoeskr/cms_style/layout.css
new file mode 100644
index 0000000..42ea1bc
--- /dev/null
+++ b/ratatoeskr/cms_style/layout.css
@@ -0,0 +1,156 @@
+* {
+	font-family: sans-serif;
+	font-size: 10pt;
+}
+
+body, html {
+	margin: 0px;
+	padding:0px;
+}
+
+#bar_top {
+	margin: 0px;
+	position: fixed;
+	top: 0px;
+	left: 0px;
+	width: 100%;
+	background: black;
+	padding: 3px 15px 3px;
+	color: #ddd;
+	z-index: 1000;
+}
+#bar_top .user {
+	text-align: right;
+	position: absolute;
+	right: 45px;
+}
+
+#bar_top strong {
+	color: white;
+}
+
+#bar_top a {
+	color: #ddd;
+	text-decoration: underline;
+}
+
+#bar_top a:hover {
+	color: #fff;
+}
+
+#maincontainer {
+	position: absolute;
+	width: 95%;
+	left: 2.5%;
+	margin: 2.5em 0em 2em;
+	padding: 0px;
+}
+
+#mainmenu {
+	float:left;
+	width: 55mm
+}
+
+#mainmenu, #mainmenu ul {
+	padding: 0px;
+	margin: 0px;
+	list-style: none;
+}
+
+#mainmenu ul {
+	display: none;
+}
+
+#mainmenu ul.active {
+	display: block;
+}
+
+#mainmenu li {
+	font-size: 12pt;
+}
+
+#mainmenu li a {
+	padding: 0.5ex 2mm 0.5ex 2mm;
+	border-top: 1px solid #eee;
+	font-size: 12pt;
+	color: #666;
+	text-decoration: none;
+	display:block;
+}
+
+#mainmenu li a.first {
+	border: none;
+}
+
+#mainmenu ul li a {
+	padding: 0.5ex 0px 0.5ex 7mm;
+}
+
+#mainmenu li a.active {
+	color: black;
+}
+
+#mainmenu li a:hover {
+	color: black;
+	background: #eee;
+}
+
+#content {
+	padding: 0mm 0mm 0mm 60mm;
+}
+
+h1 {
+	font-size: 14pt;
+	font-weight: normal;
+	margin: 0mm auto 1.5em;
+	color: #333;
+	text-align: center;
+	padding: 0px 0px 5px 0px;
+	border-bottom: 1px solid #eee;
+	/*background: url(images/hline.png) no-repeat bottom center;*/
+	min-width: 300px;
+}
+
+code, code pre {
+	font-family: monospace;
+	background: #eee;
+}
+
+h1 strong {
+	font-size: 14pt;
+	font-weight: bold;
+	color: black;
+}
+
+h2 {
+	font-size: 11pt;
+	font-weight: bold;
+}
+
+.triplecolumns .column_left{
+	float: left;
+	width: 50mm;
+	margin: 0px;
+	padding: 0px;
+}
+
+.triplecolumns .column_right {
+	float: right;
+	width: 50mm;
+	margin: 0px;
+	padding: 0px;
+}
+
+.triplecolumns .column_main {
+	margin: 0mm;
+	padding: 0mm 55mm 0mm;
+}
+
+.triplecolumns_stop {
+	clear: both;
+}
+
+form.fullwidthinputs input[type="text"], form.fullwidthinputs input[type="password"], form.fullwidthinputs select, form.fullwidthinputs textarea {
+	width: 100%;
+	margin:0mm;
+}
diff --git a/ratatoeskr/frontend.php b/ratatoeskr/frontend.php
new file mode 100644
index 0000000..eff7511
--- /dev/null
+++ b/ratatoeskr/frontend.php
@@ -0,0 +1,748 @@
+<?php
+/*
+ * File: ratatoeskr/frontend.php
+ * All the stuff for the frontend (i.e. what the visitor of the website sees).
+ * 
+ * License:
+ * This file is part of Ratatöskr.
+ * Ratatöskr is licensed unter the MIT / X11 License.
+ * See "ratatoeskr/licenses/ratatoeskr" for more information.
+ */
+
+require_once(dirname(__FILE__) . "/sys/utils.php");
+require_once(dirname(__FILE__) . "/languages.php");
+require_once(dirname(__FILE__) . "/sys/models.php");
+require_once(dirname(__FILE__) . "/sys/textprocessors.php");
+
+/*
+ * Function: section_transform_ste
+ * Transforms an <Section> object to an array, so it can be accessed via a STE template.
+ * 
+ * Parameters:
+ * 	$section - <Section> object.
+ * 	$lang - The current language.
+ * 
+ * Returns:
+ * 	Array with these fields:
+ * 	* id
+ * 	* name
+ * 	* title
+ */
+function section_transform_ste($section, $lang)
+{
+	return array(
+		"id"    => $section->get_id(),
+		"name"  => $section->name,
+		"title" => $section->title[$lang]->text
+	);
+}
+
+/*
+ * Function: tag_transform_ste
+ * Transforms an <Tag> object to an array, so it can be accessed via a STE template.
+ * 
+ * Parameters:
+ * 	$section - <Tag> object.
+ * 	$lang - The current language.
+ * 
+ * Returns:
+ * 	Array with these fields:
+ * 	* id
+ * 	* name
+ * 	* title
+ */
+function tag_transform_ste($tag, $lang)
+{
+	return array(
+		"id"    => $tag->get_id(),
+		"name"  => $tag->name,
+		"title" => $tag->title[$lang]->text
+	);
+}
+
+/*
+ * Function: article_transform_ste
+ * Transforms an <Article> object to an array, so it can be accessed via a STE template.
+ * 
+ * Parameters:
+ * 	$article - <Article> object.
+ * 	$lang - The current language.
+ * 
+ * Returns:
+ * 	Array with these fields:
+ * 	* id
+ * 	* urltitle
+ * 	* fullurl
+ * 	* title
+ * 	* text
+ * 	* excerpt
+ * 	* custom (array: name=>value)
+ * 	* status (numeric)
+ * 	* section (sub-fields: <section_transform_ste>)
+ * 	* timestamp, tags (array(sub-fields: <tag_transform_ste>))
+ * 	* languages (array: language name=>url)
+ * 	* comments_allowed
+ */
+function article_transform_ste($article, $lang)
+{
+	global $rel_path_to_root;
+	
+	$languages = array();
+	foreach($article->title as $language => $_)
+		$languages[$language] = "$rel_path_to_root/$language/{$article->section->name}/{$article->urltitle}";
+	
+	return array(
+		"id" => $article->get_id(),
+		"urltitle"         => $article->urltitle,
+		"fullurl"          => htmlesc("$rel_path_to_root/$lang/{$article->section->name}/{$article->urltitle}"),
+		"title"            => htmlesc($article->title[$lang]->text),
+		"text"             => textprocessor_apply_translation($article->text[$lang]),
+		"excerpt"          => textprocessor_apply_translation($article->excerpt[$lang]),
+		"custom"           => $article->custom,
+		"status"           => $article->status,
+		"section"          => section_transform_ste($article->section, $lang),
+		"timestamp"        => $article->timestamp,
+		"tags"             => array_map(function($tag) use ($lang) { return tag_transform_ste($tag, $lang); }, $article->tags),
+		"languages"        => $languages,
+		"comments_allowed" => $article->comments_allowed
+	);
+}
+
+/*
+ * Function: comment_transform_ste
+ * Transforms an <Comment> object to an array, so it can be accessed via a STE template.
+ * 
+ * Parameters:
+ * 	$comment - <Comment> object.
+ * 
+ * Returns:
+ * 	Array with these fields:
+ * 	* id
+ * 	* text
+ * 	* author
+ * 	* timestamp
+ */
+function comment_transform_ste($comment)
+{
+	global $rel_path_to_root, $ratatoeskr_settings;
+	
+	return array(
+		"id"        => $comment->get_id(),
+		"text"      => textprocessor_apply($comment->text, $ratatoeskr_settings["comment_textprocessor"]),
+		"author"    => htmlesc($comment->author_name),
+		"timestamp" => $comment->get_timestamp()
+	);
+}
+
+/* Register some tags for the template engine */
+/*
+ * STETag: articles_get
+ * Get articles by custom criterias. Will only get articles, that are available in the current language ($language).
+ * The fields of an article can be looked up at <article_transform_ste>.
+ * 
+ * Parameters:
+ * 	var      - (mandatory) The name of the variable, where the current article should be stored at.
+ * 	id       - (optional)  Filter by ID.
+ * 	urltitle - (optional)  Filter by urltitle.
+ * 	section  - (optional)  Filter by section (section name).
+ * 	status   - (optional)  Filter by status (numeric, <ARTICLE_STATUS_>).
+ * 	tag      - (optional)  Filter by tag (tag name).
+ * 	sort     - (optional)  How to sort. Format: "fieldname direction" where fieldname is one of [id, urltitle, title, timestamp] and direction is one of [asc, desc].
+ * 	perpage  - (optional)  How many articles should be shown per page (default unlimited).
+ * 	page     - (optional)  On which page are we (starting with 1). Useful in combination with $current[page], <page_prev> and <page_next>. (Default: 1)
+ * 	maxpage  - (optional)  (variable name) If given, the number of pages are stored in this variable.
+ * 	skip     - (optional)  How many articles should be skipped? (Default: none)
+ * 	count    - (optional)  How many articles to output. (Default unlimited)
+ *
+ * Tag Content:
+ * 	The tag's content will be executed for every article. The current article will be written to the variable specified by the var parameter before.
+ *
+ * Returns:
+ * 	All results from the tag content.
+ */
+$ste->register_tag("articles_get", function($ste, $params, $sub)
+{
+	$lang = $ste->vars["language"];
+	
+	if(!isset($params["var"]))
+		throw new Exception("Parameter var is needed in article_get!");
+	
+	$result = Article::by_multi($params);
+	
+	if(isset($params["tag"]))
+	{
+		if(!isset($result))
+			$result = Article::all();
+		$result = array_filter($result, function($article) use ($params) { return isset($article->tags[$params["tag"]]); });
+	}
+	
+	/* Now filter out the articles, where the current language does not exist */
+	$result = array_filter($result, function($article) use ($lang) { return isset($article->title[$lang]); });
+	
+	/* Also filter the hidden ones out */
+	$result = array_filter($result, function($article) { return $article->status != ARTICLE_STATUS_HIDDEN; });
+	
+	/* Convert articles to arrays */
+	$result = array_map(function($article) use ($lang) { return article_transform_ste($article, $lang); }, $result);
+	
+	function sort_fx_factory($cmpfx, $field, $direction)
+	{
+		return function($a, $b) use ($sorter, $field, $direction) { return $cmpfx($a[$field], $b[$field]) * $direction; };
+	}
+	
+	if(isset($params["sort"]))
+	{
+		list($field, $direction) = explode(" ", $params["sort"]);
+		if((@$direction != "asc") and (@$direction != "desc"))
+			$direction = "asc";
+		$direction = ($direction == "asc") ? 1 : -1;
+		$sort_fx = NULL;
+		
+		switch($field)
+		{
+			case "id":        $sort_fx = sort_fx_factory("intcmp", "id",        $direction); break;
+			case "urltitle":  $sort_fx = sort_fx_factory("strcmp", "urltitle",  $direction); break;
+			case "title":     $sort_fx = sort_fx_factory("strcmp", "title",     $direction); break;
+			case "timestamp": $sort_fx = sort_fx_factory("intcmp", "timestamp", $direction); break;
+		}
+		
+		if($sort_fx !== NULL)
+			usort($result, $sort_fx);
+	}
+	if(isset($params["perpage"]))
+	{
+		if(isset($params["maxpage"]))
+			$ste->set_var_by_name($params["maxpage"], ceil(count($result) / $params["perpage"]));
+		$page = isset($params["page"]) ? $params["page"] : 1;
+		$result = array_slice($result, ($page - 1) * $params["perpage"], $params["perpage"]);
+	}
+	else if(isset($params["skip"]) and isset($params["count"]))
+		$result = array_slice($result, $params["skip"], $params["count"]);
+	else if(isset($params["skip"]))
+		$result = array_slice($result, $params["skip"]);
+	else if(isset($params["count"]))
+		$result = array_slice($result, 0, $params["count"]);
+	
+	$output = "";
+	foreach($result as $article)
+	{
+		$ste->set_var_by_name($params["var"], $article);
+		$output .= $sub($ste);
+	}
+	return $output;
+});
+
+/*
+ * STETag: section_list
+ * Iterate over all sections.
+ * The fields of a section can be looked up at <section_transform_ste>.
+ * 
+ * Parameters:
+ * 	var             - (mandatory) The name of the variable, where the current section should be stored at.
+ * 	exclude         - (optional)  Sections to exclude
+ * 	include_default - (optional)  Should the default section be included (default: No).
+ * 
+ * Tag Content:
+ * 	The tag's content will be executed for every section. The current section will be written to the variable specified by the var parameter before.
+ *
+ * Returns:
+ * 	All results from the tag content.
+ */
+$ste->register_tag("section_list", function($ste, $params, $sub)
+{
+	global $ratatoeskr_settings;
+	$lang = $ste->vars["language"];
+	
+	if(!isset($params["var"]))
+		throw new Exception("Parameter var is needed in article_get!");
+	
+	$result = Section::all();
+	
+	if(isset($params["exclude"]))
+	{
+		$exclude = explode(",", $params["exclude"]);
+		$result = array_filter($result, function($section) use ($exclude) { return !in_array($section->name, $exclude); });
+	}
+	
+	$result = array_filter($result, function($section) use ($default_section) { return $section->get_id() != $default_section; });
+	
+	$result = array_map(function($section) use ($lang) { return section_transform_ste($section, $lang); }, $result);
+	
+	if($ste->evalbool($params["include_default"]))
+	{
+		$default = section_transform_ste(Section::by_id($ratatoeskr_settings["default_section"]));
+		array_unshift($result, $default);
+	}
+	
+	$output = "";
+	foreach($result as $section)
+	{
+		$ste->set_var_by_name($params["var"], $section);
+		$output .= $sub($ste);
+	}
+	return $output;
+});
+
+/*
+ * STETag: article_comments_count
+ * Get the number of comments for an article.
+ * 
+ * Parameters:
+ * 	article - (mandatory) The name of the variable, where the article is stored at.
+ * 
+ * Returns:
+ * 	The number of comments.
+ */
+$ste->register_tag("article_comments_count", function($ste, $params, $sub)
+{
+	if(!isset($params["article"]))
+		throw new Exception("Need parameter 'article' in ste:article_comments_count.");
+	$tpl_article = $ste->get_var_by_name($params["article"]);
+	$lang = $ste->vars["language"];
+	
+	try
+	{
+		$article = Article::by_id(@$tpl_article["id"]);
+		return count($article->get_comments($lang, True));
+	}
+	catch(DoesNotExistError $e)
+	{
+		return 0;
+	}
+});
+
+/*
+ * STETag: article_comments
+ * List all comments for an article.
+ * The fields of a comment can be looked up at <comment_transform_ste>.
+ * 
+ * Parameters:
+ * 	var     - (mandatory) The name of the variable, where the current comment should be stored at.
+ * 	article - (mandatory) The name of the variable, where the article is stored at.
+ * 
+ * Tag Content:
+ * 	The tag's content will be executed for every comment. The current comment will be written to the variable specified by the var parameter before.
+ * 
+ * Returns:
+ * 	All results from the tag content.
+ */
+$ste->register_tag("article_comments", function($ste, $params, $sub)
+{
+	if(!isset($params["var"]))
+		throw new Exception("Need parameter 'var' in ste:article_comments.");
+	if(!isset($params["article"]))
+		throw new Exception("Need parameter 'article' in ste:article_comments.");
+	$tpl_article = $ste->get_var_by_name($params["article"]);
+	$lang = $ste->vars["language"];
+	
+	try
+	{
+		$article = Article::by_id(@$tpl_article["id"]);
+	}
+	catch(DoesNotExistError $e)
+	{
+		return "";
+	}
+	
+	$comments = $article->get_comments($lang, True);
+	usort($comments, function($a,$b) { intcmp($a->get_timestamp(), $b->get_timestamp()); });
+	
+	$comments = array_map("comment_transform_ste", $comments);
+	
+	$output = "";
+	foreach($comments as $comment)
+	{
+		$ste->set_var_by_name($params["var"], $comment);
+		$output .= $sub($ste);
+	}
+	return $output;
+});
+
+/*
+ * STETag: comment_form
+ * Generates a HTML form tag that allows the visitor to write a comment.
+ * 
+ * Parameters:
+ * 	article - (mandatory) The name of the variable, where the article is stored at.
+ * 	default - (optional)  If not empty, a default formular with the mandatory fields will be generated.
+ * 
+ * Tag Content:
+ * 	The tag's content will be written into the HTML form tag.
+ * 	You have at least to define these fields:
+ * 	
+ * 	* <input type="text" name="author_name" />    - The Name of the author.
+ * 	* <input type="text" name="author_mail" />    - The E-Mailaddress of the author.
+ * 	* <textarea name="comment_text"></textarea>   - The Text of the comment.
+ * 	* <input type="submit" name="post_comment" /> - Submit button.
+ * 	
+ * 	You might also want to define this:
+ * 	
+ * 	* <input type="submit" name="preview_comment" /> - For a preview of the comment.
+ * 	
+ * 	If the parameter default is not empty, the tag's content will be thrown away.
+ * 
+ * Returns:
+ * 	The finished HTML form.
+ */
+$ste->register_tag("comment_form", function($ste, $params, $sub)
+{
+	global $translation;
+	if(!isset($params["article"]))
+		throw new Exception("Need parameter 'article' in ste:comment_form.");
+	$tpl_article = $ste->get_var_by_name($params["article"]);
+	
+	try
+	{
+		$article = Article::by_id($tpl_article["id"]);
+	}
+	catch (DoesNotExistError $e)
+	{
+		return "";
+	}
+	
+	if(!$article->allow_comments)
+		return "";
+	
+	$form_header = "<form action=\"{$tpl_article["fullurl"]}?comment\" method=\"POST\" accept-charset=\"UTF-8\">";
+	
+	if($ste->evalbool(@$params["default"]))
+		$form_body = "<p>{$translation["comment_form_name"]}: <input type=\"text\" name=\"author_name\" /></p>
+<p>{$translation["comment_form_mail"]}: <input type=\"text\" name=\"author_mail\" /></p>
+<p>{$translation["comment_form_text"]}:<br /><textarea name=\"comment_text\" cols=\"50\" rows=\"10\"></textarea></p>
+<p><input type=\"submit\" name=\"post_comment\" /></p>";
+	else
+		$form_body = $sub($ste);
+	
+	return "$form_header\n$form_body\n</form>";
+});
+
+/*
+ * STETags: Page control
+ * These tags can create links to the previous/next page.
+ * 
+ * page_prev - Link to the previous page (if available).
+ * page_next - Link to the next page (if available).
+ * 
+ * Parameters:
+ * 	current - (mandatory) The current page number.
+ * 	maxpage - (mandatory) How many pages in total?
+ * 	default - (optional)  If not empty, a default localized link text will be used.
+ * 
+ * Tag Content:
+ * 	The tag's content will be used as the link text.
+ * 
+ * Returns:
+ * 	A Link to the previous / next page.
+ */
+
+$ste->register_tag("page_prev", function($ste, $params, $sub)
+{
+	if(!isset($params["current"]))
+		throw new Exception("Need parameter 'current' in ste:page_prev.");
+	if(!isset($params["maxpage"]))
+		throw new Exception("Need parameter 'maxpage' in ste:page_prev.");
+	
+	if($params["page"] == 1)
+		return "";
+	
+	parse_str(parse_url($_SERVER["REQUEST_URI"], PHP_URL_QUERY), $query);
+	$query["page"] = $params["page"] - 1;
+	$url = $_SERVER["REDIRECT_URL"] . "?" . http_build_query($query);
+	return "<a href=\"" . htmlesc($url) . "\">" . (($ste->evalbool(@$params["default"])) ? $translation["page_prev"] : $sub($ste)) . "</a>";
+});
+
+$ste->register_tag("page_next", function($ste, $params, $sub)
+{
+	if(!isset($params["current"]))
+		throw new Exception("Need parameter 'current' in ste:page_next.");
+	if(!isset($params["maxpage"]))
+		throw new Exception("Need parameter 'maxpage' in ste:page_next.");
+	
+	if($params["page"] == $params["maxpage"])
+		return "";
+	
+	parse_str(parse_url($_SERVER["REQUEST_URI"], PHP_URL_QUERY), $query);
+	$query["page"] = $params["page"] + 1;
+	$url = $_SERVER["REDIRECT_URL"] . "?" . http_build_query($query);
+	return "<a href=\"" . htmlesc($url) . "\">" . (($ste->evalbool(@$params["default"])) ? $translation["page_next"] : $sub($ste)) . "</a>";
+});
+
+/*
+ * STETag: languages
+ * List all languages available in the current context.
+ * 
+ * Parameters:
+ * 	var - (mandatory) The name of the variable, where the current language information should be stored at.
+ * 
+ * Sub-fields of var:
+ * 	short    - 2 letter code of language
+ * 	fullname - The full name of the language
+ * 	url      - URL to the current page in this language
+ *
+ * Tag Content:
+ * 	The tag's content will be executed for every language. The current language will be written to the variable specified by the var parameter before.
+ * 
+ * Returns:
+ * 	All results from the tag content.
+ */
+$ste->register_tag("languages", function($ste, $params, $sub)
+{
+	global $languages, $ratatoeskr_settings, $rel_path_to_root;
+	
+	if(!isset($params["var"]))
+		throw new Exception("Need parameter 'var' in ste:languages.");
+	
+	$langs = array();
+	if(isset($ste->vars["current"]["article"]))
+	{
+		try
+		{
+			$article = Article::by_id($ste->vars["current"]["article"]["id"]);
+			foreach($article->title as $lang => $_)
+				$langs[] = $lang;
+		}
+		catch(DoesNotExistError $e) {}
+	}
+	else
+	{
+		
+		foreach($ratatoeskr_settings["languages"] as $lang)
+			$langs[] = $lang;
+	}
+	
+	$output = "";
+	foreach($langs as $lang)
+	{
+		$ste->set_var_by_name($params["var"], array(
+			"short"    => $lang,
+			"fullname" => urlesc($languages[$lang]["language"]),
+			"url"      => urlesc("$rel_path_to_root/$lang/" . implode("/", array_slice($ste->vars["current"]["url_fragments"], 1)))
+		));
+		$output .= $sub($ste);
+	}
+	return $output;
+});
+
+/*
+ * STETag: styles_load
+ * Load all current styles.
+ * 
+ * Parameters:
+ * 	mode - (optional) Either "embed" or "link". Default: link
+ * 
+ * Returns:
+ * 	The current styles (either linked or embedded)
+ */
+$ste->register_tag("styles_load", function($ste, $params, $sub)
+{
+	global $rel_path_to_root;
+	if(isset($params["mode"]) and (($params["mode"] == "embed") or ($params["mode"] == "link")))
+		$mode = $params["mode"];
+	else
+		$mode = "link";
+	
+	if($mode == "embed")
+	{
+		$output = "";
+		foreach($ste->vars["current"]["styles"] as $stylename)
+		{
+			try
+			{
+				$style = Style::by_name($stylename);
+				$output .= "/* Style: $stylename */\n" . $style->code . "\n";
+			}
+			catch(DoesNotExistError $e)
+			{
+				$output .= "/* Warning: Failed to load style: $stylename */\n";
+			}
+		}
+		$output = "<style type=\"text/css\">\n" . htmlesc($output) . "</style>";
+	}
+	else
+	{
+		$output = "";
+		foreach($ste->vars["current"]["styles"] as $stylename)
+		{
+			try
+			{
+				$style = Style::by_name($stylename);
+				$output .= "<link rel=\"stylesheet\" type=\"text/css\" href=\"" . htmlesc($rel_path_to_root . "css.php?name=" . urlencode($style->name)) . "\" />\n";
+			}
+			catch(DoesNotExistError $e)
+			{
+				$output .= "<!-- Warning: Failed to load style: $stylename */ -->\n";
+			}
+		}
+	}
+	return $output;
+});
+
+/*
+ * STEVar: $current
+ * Holds information about the current page in the frontend (the part of the webpage, the visitor sees).
+ * 
+ * $current has these fields:
+ * 	* article       - Only set if a single article is shown. Holds information about an article. (sub-fields are described at <article_transform_ste>).
+ * 	* section       - Only set if a whole section is shown. Holds information about an section. (sub-fields are described at <section_transform_ste>).
+ * 	* tag           - Only set if all articles with the same tag should be shown. Holds information about a tag. (sub-fields are described at <tag_transform_ste>).
+ * 	* page          - Which subpage is shown? Useful with <page_prev>, <page_next> and the page parameter of <articles_get>. Default: 1
+ * 	* commented     - True, if the visitor has successfully written a comment.
+ * 	* comment_fail  - If the user tried to comment, but the system rejected the comment, this will be set and will contain the error message.
+ * 	* comment_prev  - If the user wanted to preview the article, this will be set and contain the HTML code of the comment.
+ * 	* styles        - The styles, that should be loaded. You can also just use <styles_load>.
+ * 	* url_fragments - Array of URL parts. Mainly used internally, so you *really* should not modify this one...
+ * 	
+ * 	Plugins might insert their own $current fields.
+ */
+
+/*
+ * STEVar: $language
+ * The short form (e.g. "en" for English, "de" for German, ...) of the current language.
+ */
+
+$comment_validators = array(
+	function()
+	{
+		global $translation;
+		if(empty($_POST["author_name"]))
+			throw new CommentRejected($translation["author_name_missing"]);
+		if(empty($_POST["author_email"]))
+			throw new CommentRejected($translation["author_email_missing"]);
+		if(empty($_POST["comment_text"]))
+			throw new CommentRejected($translation["comment_text_missing"]);
+	}
+);
+
+/*
+ * Function: register_comment_validator
+ * Register a comment validator.
+ * 
+ * A comment validator is a function, that checks the $_POST fields and decides whether a comment should be stored or not (throws an <CommentRejected> exception with the rejection reason as the message).
+ * 
+ * Parameters:
+ * 	$fx - The validator function (function()).
+ */
+function register_comment_validator($fx)
+{
+	global $comment_validators;
+	$comment_validators[] = $fx;
+}
+
+/*
+ * Function: frontend_url_handler
+ */
+function frontend_url_handler(&$data, $url_now, &$url_next)
+{
+	global $ste, $ratatoeskr_settings, $languages, $metasections, $comment_validators;
+	$path = array_merge(array($url_now), $url_next);
+	$url_next  = array();
+	
+	$default_section = Section::by_id($ratatoeskr_settings["default_section"]);
+	
+	/* If no language or an invalid language was given, fix it. */
+	if((count($path) == 0) or (!isset($languages[$path[0]])))
+	{
+		if(count($path > 0))
+			array_shift($path);
+		array_unshift($path, $ratatoeskr_settings["default_language"]);
+	}
+	
+	$ste->vars["current"]["url_fragments"] = $path;
+	
+	$lang = array_shift($path);
+	$ste->vars["language"] = $lang;
+	load_language($languages[$lang]["translation_exist"] ? $lang : "en"); /* English is always available */
+	
+	if(count($path) == 0)
+		array_unshift($path, $ratatoeskr_settings["default_section"]->name);
+	
+	$section_name = array_shift($path);
+	
+	if($section_name == "_tags")
+	{
+		try
+		{
+			$tag = Tag::by_name(array_shift($path));
+		}
+		catch(DoesNotExistError $e)
+		{
+			throw new NotFoundError();
+		}
+		$ste->vars["current"]["tag"] = tag_transform_ste($tag);
+	}
+	else
+	{
+		try
+		{
+			$section = Section::by_name($section_name);
+		}
+		catch(DoesNotExistError $e)
+		{
+			throw new NotFoundError();
+		}
+		
+		if(count($path == 0))
+			$ste->vars["current"]["section"] = section_transform_ste($section);
+		else
+		{
+			try
+			{
+				$article = Article::by_urlname(array_shift($path));
+			}
+			catch(DoesNotExistError $e)
+			{
+				throw new NotFoundError();
+			}
+			$ste->vars["current"]["article"] = article_transform_ste($article);
+			
+			if(isset($_GET["comment"]))
+			{
+				if(isset($_POST["comment_prev"]))
+					$ste->vars["current"]["comment_prev"] = textprocessor_apply($_POST["comment_text"], $ratatoeskr_settings["comment_textprocessor"]);
+				else if(isset($_POST["post_comment"]))
+				{
+					$rejected = False;
+					try
+					{
+						foreach($comment_validators as $validator)
+							call_user_func($validator);
+					}
+					catch(CommentRejected $e)
+					{
+						$ste->vars["current"]["comment_fail"] = htmlesc($e->getMessage());
+						$rejected = True;
+					}
+					if(!$rejected)
+					{
+						$comment = Comment::create($article, $lang);
+						$comment->author_name = $_POST["author_name"];
+						$comment->author_mail = $_POST["author_email"];
+						$comment->text        = $_POST["comment_text"];
+						$comment->save();
+						$ste->vars["current"]["commented"] = "Yes";
+					}
+				}
+			}
+		}
+	}
+	
+	$ste->vars["current"]["page"] = (isset($_GET["page"]) and is_numeric($_GET["page"])) ? $_GET["page"] : 1;
+	
+	if(!isset($section))
+		$section = $default_section;
+	
+	foreach($section->styles as $style)
+		$ste->vars["current"]["styles"][] = $style->name;
+	echo $ste->exectemplate("/usertemplates/" . $section->template);
+}
+
+/*
+ * Class: CommentRejected
+ * An Exeption a comment validator can throw, if the validation failed.
+ * 
+ * See Also:
+ * 	<register_comment_validator>
+ */
+class CommentValidationFailed extends Exception {}
+
+?>
diff --git a/ratatoeskr/main.php b/ratatoeskr/main.php
index 09f4d8d..041b96e 100644
--- a/ratatoeskr/main.php
+++ b/ratatoeskr/main.php
@@ -15,7 +15,7 @@ require_once(dirname(__FILE__) . "/sys/models.php");
 require_once(dirname(__FILE__) . "/sys/init_ste.php");
 require_once(dirname(__FILE__) . "/sys/translation.php");
 require_once(dirname(__FILE__) . "/sys/urlprocess.php");
-#require_once(dirname(__FILE__) . "/frontend.php");
+require_once(dirname(__FILE__) . "/frontend.php");
 require_once(dirname(__FILE__) . "/backend/main.php");
 
 function ratatoeskr()
@@ -38,12 +38,20 @@ function ratatoeskr()
 	}
 	
 	/* Register URL handlers */
-	#register_url_handler("_default", "frontend_url_handler");
+	register_url_handler("_default", "frontend_url_handler");
 	register_url_handler("backend", $backend_subactions);
-	#register_url_handler("_notfound", "e404handler");
+	register_url_handler("_notfound", url_action_simple(function($data)
+	{
+		global $ste;
+		//header("HTTP/1.1 404 Not Found");
+		$ste->vars["title"]   = "404 Not Found";
+		$ste->vars["details"] = str_replace("[[URL]]", $_SERVER["REQUEST_URI"], (isset($translation) ? $translation["e404_details"] : "The page [[URL]] could not be found. Sorry."));
+		echo $ste->exectemplate("systemtemplates/error.html");
+	}));
 	
 	$urlpath = explode("/", $_GET["action"]);
 	$rel_path_to_root = implode("/", array_merge(array("."), array_repeat("..", count($urlpath) - 1)));
+	$GLOBALS["rel_path_to_root"] = $rel_path_to_root;
 	$data = array("rel_path_to_root" => $rel_path_to_root);
 	$ste->vars["rel_path_to_root"] = $rel_path_to_root;
 	
diff --git a/ratatoeskr/sys/default_settings.php b/ratatoeskr/sys/default_settings.php
index 7b42028..cb755cb 100644
--- a/ratatoeskr/sys/default_settings.php
+++ b/ratatoeskr/sys/default_settings.php
@@ -4,7 +4,8 @@ $default_settings = array(
 	"comment_visible_default" => False,
 	"default_language"        => "en",
 	"default_section"         => 0/* Must be created */
-	"allow_comments_default"  => True
+	"allow_comments_default"  => True,
+	"comment_textprocessor"   => "Markdown"
 );
 
 ?>
diff --git a/ratatoeskr/sys/textprocessors.php b/ratatoeskr/sys/textprocessors.php
new file mode 100644
index 0000000..3e67b01
--- /dev/null
+++ b/ratatoeskr/sys/textprocessors.php
@@ -0,0 +1,78 @@
+<?php
+/*
+ * File: ratatoeskr/textprocessors.php
+ * Manage text processors (functions that transform text to HTML) and implement some default ones.
+ * 
+ * License:
+ * This file is part of Ratatöskr.
+ * Ratatöskr is licensed unter the MIT / X11 License.
+ * See "ratatoeskr/licenses/ratatoeskr" for more information.
+ */
+
+require_once(dirname(__FILE__) . "/../libs/markdown.php");
+require_once(dirname(__FILE__) . "/utils.php");
+
+/*
+ * Function: textprocessor_register
+ * Register a textprocessor.
+ * 
+ * Parameters:
+ * 	$namen              - The name of the textprocessor
+ * 	$fx                 - The textprocessor function (function($input), returns HTML)
+ * 	$visible_in_backend - Should this textprocessor be visible in the backend? Defaults to True.
+ */
+function textprocessor_register($name, $fx, $visible_in_backend=True)
+{
+	global $textprocessors;
+	$textprocessors[$name] = array($fx, $visible_in_backend);
+}
+
+/*
+ * Function: textprocessor_apply
+ * Apply a textprocessor on a text.
+ * 
+ * Parameters:
+ * 	$text          - The input text.
+ * 	$textprocessor - The name of the textprocessor.
+ * 
+ * Returns:
+ * 	HTML
+ */
+function textprocessor_apply($text, $textprocessor)
+{
+	global $textprocessors;
+	if(!isset($textprocessors[$textprocessor]))
+		throw new Exception("Unknown Textprocessor: $textprocessor");
+	
+	$fx = @$textprocessors[$textprocessor][0];
+	if(!is_callable($fx))
+		throw new Exception("Invalid Textprocessor: $textprocessor");
+	
+	return call_user_func($fx, $text);
+}
+
+/*
+ * Function: textprocessor_apply_translation
+ * Applys a textprocessor automatically on a <Translation> object. The used textprocessor is determined by the $texttype property.
+ * 
+ * Parameters:
+ * 	$translationobj - The <Translation> object.
+ * 
+ * Returns:
+ * 	HTML
+ */
+function textprocessor_apply_translation($translationobj)
+{
+	return textprocessor_apply($translationobj->text, $translationobj->texttype);
+}
+
+if(!isset($textprocessors))
+{
+	$textprocessors = array(
+		"Markdown" => array("Markdown", True),
+		"Plain Text" => array(function($text) { return str_replace(array("\r\n", "\n"), array("<br />", "<br />"), htmlesc($text)); }, True),
+		"HTML" => array(function($text) { return $text; }, True)
+	);
+}
+
+?>
diff --git a/ratatoeskr/templates/src/systemtemplates/content_write.html b/ratatoeskr/templates/src/systemtemplates/content_write.html
new file mode 100644
index 0000000..962f116
--- /dev/null
+++ b/ratatoeskr/templates/src/systemtemplates/content_write.html
@@ -0,0 +1,22 @@
+<ste:load name="master.html" />
+<ste:block name="content">
+	<form action="$rel_path_to_root/content/write?{$article_editurl|/$article_editurl|}" method="POST" accept_charset="utf-8" class="fullwidthinputs">
+	<div class="triplecolumns">
+		<div class="column_left">
+			<h2>Markdown Cheat Sheet</h2>
+		</div>
+		<div class="column_right">
+			<h2>Settings / Metadata</h2>
+			
+			<p>Unique URL Title: <input type="text" name="urltitle" value="<ste:escape>$urltitle</ste:escape>" /></p>
+			<p></p>
+		</div>
+		<div class="column_main">
+			<p><ste:get_translation for="articleedit_title" />: <input type="text" name="title" value="<ste:escape>$title</ste:escape>" /></p>
+			<p><ste:get_translation for="articleedit_content" />: <textarea name="content" cols="80" rows="20"><ste:escape>$content</ste:escape></textarea></p>
+			<p><ste:get_translation for="articleedit_excerpt" />: <textarea name="excerpt" cols="80" rows="10"><ste:escape>$excerpt</ste:escape></textarea></p>
+		</div>
+	</div>
+	<div class="triplecolumns_stop"></div>
+	</form>
+</ste:block>
diff --git a/ratatoeskr/templates/src/systemtemplates/error.html b/ratatoeskr/templates/src/systemtemplates/error.html
new file mode 100644
index 0000000..c8ece93
--- /dev/null
+++ b/ratatoeskr/templates/src/systemtemplates/error.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+	<meta http-equiv="Content-Style-Type" content="text/css" />
+	<title>$title</title>
+	<style type="text/css" media="screen">
+		* { font-family: sans-serif; color: #bfbfbf; text-align: center;}
+		body { background: #3f3f3f; }
+	</style>
+</head>
+<body>
+	<h1><ste:escape>$title</ste:escape></h1>
+	<img src="$rel_path_to_root/ratatoeskr/cms_style/images/dead_emoticon.png" alt="" />
+	<p><ste:escape>$details</ste:escape></p>
+</body>
+</html>
diff --git a/ratatoeskr/templates/src/systemtemplates/master.html b/ratatoeskr/templates/src/systemtemplates/master.html
new file mode 100755
index 0000000..ca7175f
--- /dev/null
+++ b/ratatoeskr/templates/src/systemtemplates/master.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+	<meta http-equiv="Content-Style-Type" content="text/css" />
+	<title><ste:get_translation for="section_$section" />::<ste:escape>$pagetitle</ste:escape> - Ratatöskr</title>
+	<ste:mktag name="cms_style"><link rel="stylesheet" type="text/css" media="screen" href="$rel_path_to_root/ratatoeskr/cms_style/<ste:tagcontent />" /></ste:mktag>
+	<ste:cms_style>layout.css</ste:cms_style>
+	<ste:foreach array="additional_styles" value="cssfile"><ste:cms_style>$cssfile</ste:cms_style></ste:foreach>
+</head>
+<body>
+	<div id="bar_top">
+		<span class="branding"><strong>Ratatöskr</strong>::Noctilucent clouds (v. 0.1)</span>
+		<span class="user">
+			<a href="$rel_path_to_root/backend/admin/users/_self">$user[name]</a> | <a href="$rel_path_to_root/backend/logout"><ste:get_translation for="logout" /></a>
+		</span>
+	</div>
+	<div id="maincontainer">
+		<h1><strong><ste:get_translation for="section_$section" /></strong>::<ste:escape>$pagetitle</ste:escape></h1>
+		<ul id="mainmenu">
+			<li>
+				<a href="$rel_path_to_root/backend/content/write" class="first"><ste:get_translation for="section_content" /></a>
+				<ul?{~{content|eq|$section}| class="active"|}>
+					<li><a href="$rel_path_to_root/backend/content/articles"?{~{articles|eq|$submenu}| class="active"|}><ste:get_translation for="menu_articles" /></a></li>
+					<li><a href="$rel_path_to_root/backend/content/write"?{~{newarticle|eq|$submenu}| class="active"|}><ste:get_translation for="menu_newarticles" /></a></li>
+					<li><a href="$rel_path_to_root/backend/content/tags"?{~{tags|eq|$submenu}| class="active"|}><ste:get_translation for="menu_tags" /></a></li>
+					<li><a href="$rel_path_to_root/backend/content/images"?{~{images|eq|$submenu}| class="active"|}><ste:get_translation for="menu_images" /></a></li>
+					<li><a href="$rel_path_to_root/backend/content/comments"?{~{comments|eq|$submenu}| class="active"|}><ste:get_translation for="menu_comments" /></a></li>
+				</ul>
+			</li>
+			<li>
+				<a href="$rel_path_to_root/backend/design/templates"><ste:get_translation for="section_design" /></a>
+				<ul?{~{design|eq|$section}| class="active"|}>
+					<li><a href="$rel_path_to_root/backend/design/sections"?{~{sections|eq|$submenu}| class="active"|}><ste:get_translation for="menu_pagesections" /></a></li>
+					<li><a href="$rel_path_to_root/backend/design/templates"?{~{templates|eq|$submenu}| class="active"|}><ste:get_translation for="menu_templates" /></a></li>
+					<li><a href="$rel_path_to_root/backend/design/styles"?{~{styles|eq|$submenu}| class="active"|}><ste:get_translation for="menu_styles" /></a></li>
+				</ul>
+			</li>
+			<li>
+				<a href="$rel_path_to_root/backend/admin/settings"><ste:get_translation for="section_admin" /></a>
+				<ul?{~{admin|eq|$section}| class="active"|}>
+					<li><a href="$rel_path_to_root/backend/admin/users"?{~{users|eq|$submenu}| class="active"|}><ste:get_translation for="menu_users_groups" /></a></li>
+					<li><a href="$rel_path_to_root/backend/admin/languages"?{~{comments|eq|$submenu}| class="active"|}><ste:get_translation for="menu_languages" /></a></li>
+					<li><a href="$rel_path_to_root/backend/admin/repos"?{~{repos|eq|$submenu}| class="active"|}><ste:get_translation for="menu_plugin_repos" /></a></li>
+					<li><a href="$rel_path_to_root/backend/admin/settings"?{~{settings|eq|$submenu}| class="active"|}><ste:get_translation for="menu_settings" /></a></li>
+				</ul>
+			</li>
+			<li>
+				<a href="$rel_path_to_root/backend/plugin/list"><ste:get_translation for="section_plugins" /></a>
+				<ul?{~{plugins|eq|$section}| class="active"|}>
+					<li><a href="$rel_path_to_root/backend/plugin/list"?{~{pluginlist|eq|$submenu}| class="active"|}><ste:get_translation for="menu_pluginlist" /></a></li>
+					<li><a href="$rel_path_to_root/backend/plugin/install"?{~{installplugins|eq|$submenu}| class="active"|}><ste:get_translation for="menu_plugininstall" /></a></li>
+				</ul>
+			</li>
+		</ul>
+		<div id="content">
+			<ste:block name="content"></ste:block>
+		</div>
+	</div>
+</body>
+</html>
diff --git a/ratatoeskr/translations/en.php b/ratatoeskr/translations/en.php
index 20c87b9..93951b4 100644
--- a/ratatoeskr/translations/en.php
+++ b/ratatoeskr/translations/en.php
@@ -6,7 +6,39 @@ $translation = array(
 	"login_form_header" => "Login",
 	"login_form_button" => "Login",
 	"login_background_image" => "Background image: <a href=\"[[URL]]\">[[FILENAME]]</a> by [[AUTHOR]]. License: [[LICENSE]]",
-	"login_failed" => "Login failed."
+	"login_failed" => "Login failed (Username/Password is wrong or you are not an admin).",
+	"logout" => "Logout",
+	"section_admin" => "Administration",
+	"section_content" => "Content",
+	"section_design" => "Design",
+	"section_plugins" => "Plugins",
+	"menu_articles" => "Articles",
+	"menu_comments" => "Comments",
+	"menu_images" => "Images",
+	"menu_languages" => "Languages",
+	"menu_newarticles" => "New Article",
+	"menu_pagesections" => "Page Sections",
+	"menu_plugin_repos" => "Plugin Repositories",
+	"menu_plugininstall" => "Install Plugin",
+	"menu_pluginlist" => "Plugin List",
+	"menu_settings" => "Settings",
+	"menu_styles" => "Styles",
+	"menu_tags" => "Tags",
+	"menu_templates" => "Templates",
+	"menu_users_groups" => "Users / Groups",
+	"new_article" => "New Article",
+	"articleedit_title" => "Article Title",
+	"articleedit_content" => "Content",
+	"articleedit_excerpt" => "Excerpt",
+	"comment_form_name" => "Your name",
+	"comment_form_mail" => "Your E-Mailaddress",
+	"comment_form_text" => "Your comment (Markdown format)",
+	"page_prev" => "&lt;-- previous page",
+	"page_next" => "next page --&gt;",
+	"e404_details" => "The page [[URL]] could not be found. Sorry.",
+	"author_name_missing" => "No author name given.",
+	"author_email_missing" => "No author E-Mailaddress given.",
+	"comment_text_missing" => "An empty comment can not be posted."
 );
 
 ?>