X-Git-Url: http://git.shiar.nl/minimedit.git/blobdiff_plain/903ef7aadee5cee917ce10f775a47bcf77658bae..5638a5a96b13b91c26f35ac1d860a2c5305e47e9:/page.php

diff --git a/page.php b/page.php
index 856a08a..5aac31f 100644
--- a/page.php
+++ b/page.php
@@ -2,72 +2,205 @@
 error_reporting(E_ALL);
 ini_set('display_errors', TRUE);
 
-set_exception_handler(function ($error) {
+function abort($body, $status = NULL) {
+	if ($status) header("HTTP/1.1 $status");
+	print "$body\n";
+	exit;
+}
+
+function placeholder_include($name, $params = [])
+{
+	$path = stream_resolve_include_path("widget/$name.php");
+	if (!file_exists($path)) {
+		return '<strong class="warn"><em>'.$name.'</em> ontbreekt</strong>';
+	}
+
+	ob_start();
+	$Page = $GLOBALS['Page'] . $GLOBALS['Args'];
+	$Args = '';
+	$Place = $GLOBALS['Place'];
+	foreach ($params as $param) {
+		if ($set = strpos($param, '=')) {
+			$Place[ substr($param, 0, $set) ] = substr($param, $set + 1);
+		}
+		elseif (!empty($param)) {
+			$Args .= '/'.$param;
+		}
+	}
+	try {
+		include "widget/$name.php";
+		return ob_get_clean();
+	}
+	catch (Exception $e) {
+		return sprintf('<strong class="warn">%s</strong>',
+			"fout in <em>$name</em>: {$e->getMessage()}"
+		);
+	}
+}
+
+function getoutput($blocks = [])
+{
+	$doc = ob_get_clean();
+
+	if (!empty($blocks['warn'])) {
+		$warn = '<p class="warn">[[warn]]</p>';
+		if ($offset = strpos($doc, '</h2>')) {
+			$doc = substr_replace($doc, "\n\n".$warn, $offset + 5, 0);
+		}
+		else {
+			$doc = $warn . "\n\n" . $doc;
+		}
+	}
+
+	# keep either login or logout parts depending on user level
+	global $User;
+	$hideclass = $User && property_exists($User, 'login') && $User->login ? 'logout' : 'login';
+	$doc = preg_replace('{\s*<([a-z]+) class="'.$hideclass.'">.*?</\1>}s', '', $doc);
+
+	return preg_replace_callback(
+		'{ \[\[ ([^] ]+) ([^]]*) \]\] }x',
+		function ($sub) use ($blocks) {
+			list ($placeholder, $name, $params) = $sub;
+			$html = $blocks[$name] ??
+				placeholder_include($name, explode(' ', $params));
+			if (empty($html) or $html[0] != '<') {
+				$html = "<span>$html</span>";
+			}
+			$attr = sprintf(' data-dyn="%s"', is_numeric($name) ? '' : $name.$params);
+			# contents with identifier in first tag
+			return preg_replace( '/(?=>)/', $attr, $html, 1);
+		},
+		$doc
+	);
+}
+
+# custom error handling
+
+define('DOCROOT', getcwd());
+set_include_path(implode(PATH_SEPARATOR, [ DOCROOT, __DIR__ ]));
+
+function fail($error)
+{
+	global $User, $Page, $Args;
 	http_response_code(500);
+	if (!isset($Article)) {
+		require_once('article.inc.php');
+		$Article = new ArchiveArticle(NULL);
+		$Article->title = 'Fout';
+	}
 	include_once 'page.inc.php';
 	ob_start();
-	require_once './500.html';
-	print str_replace('[[debug]]', $error, ob_get_clean());
+	require '500.inc.html';
+	print getoutput(['debug' => htmlspecialchars($error)]);
+}
+
+set_exception_handler('fail');
+
+define('E_FATAL', E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR);
+
+set_error_handler(function ($level, $error, $file, $line) {
+	if ($level & E_FATAL) {
+		fail($error);
+		return;
+	}
+	return FALSE;
+});
+
+register_shutdown_function(function () {
+	# display failure page for fatal exceptions
+	$error = error_get_last();
+	if (!($error['type'] & E_FATAL)) return;
+	fail("Fatal: $error[message] in $error[file]:$error[line]");
 });
 
-include_once 'auth.inc.php';
+error_reporting(error_reporting() & ~E_FATAL);
+
+# user login and control
+
+include_once 'auth.inc.php'; // sets global $User
 $Edit = isset($_GET['edit']);
 
-# distinguish subpage Args from topmost Page script
+# setup requested page
 
 $Args = '';
-$Page = preg_replace('/\?.*/', '', $_SERVER['REQUEST_URI']);
+$Page = preg_replace('/\?.*/', '', @$_SERVER['PATH_INFO'] ?: $_SERVER['REQUEST_URI']);
 $Page = urldecode(trim($Page, '/')) ?: 'index';
-while (TRUE) {
-	if (file_exists("$Page.php")) {
-		break;
-	}
 
-	$up = strrpos($Page, '/');
-	$Args = substr($Page, $up) . $Args;
-	$Page = substr($Page, 0, $up);
-	if ($up === FALSE) {
-		break;
+$staticpage = "$Page.html";
+if (file_exists($staticpage)) {
+	if (is_link($staticpage)) {
+		$target = preg_replace('/\.html$/', '', readlink($staticpage));
+		header("HTTP/1.1 302 Shorthand");
+		header("Location: $target");
+		exit;
 	}
 }
+elseif (file_exists("$Page/index.html")) {
+	$staticpage = "$Page/index.html";
+}
 
-# load static contents
+require_once('article.inc.php');
+$Article = new ArchiveArticle($staticpage);
 
-ob_start(); # page body
-ob_start(); # inner html
-print '<div class="static">'."\n\n";
+$Page = $Article->handler;
+$Args = $Article->path;
 
-$found = FALSE;
-if (file_exists("$Page$Args/index.html")) {
-	$found = include "./$Page$Args/index.html";
-}
-elseif (file_exists("$Page$Args.html")) {
-	$found = include "./$Page$Args.html";
+if ($PageAccess = $Article->restricted) {
+	# access restriction
+	if (!$User->login) {
+		http_response_code(303);
+		$target = urlencode($Article->link);
+		header("Location: /login?goto=$target");
+		exit;
+	}
 }
 
-print "</div>\n\n";
+# prepare page contents
 
-# execute dynamic code
+header(sprintf('Content-Security-Policy: %s', implode('; ', [
+	"default-src 'self' 'unsafe-inline' http://cdn.ckeditor.com", # some overrides remain
+	"img-src 'self' data: http://cdn.ckeditor.com", # inline svg (in css)
+	"base-uri 'self'", # only local pages
+	"frame-ancestors 'none'", # prevent malicious embedding
+])));
+
+ob_start(); # page body
+$Place = [
+	'user'  => $User->login ?: '',
+	'url'   => htmlspecialchars($_SERVER['REQUEST_URI']),
+];
 
-if ($Page) {
-	$found |= require "./$Page.php";
+if (!isset($Article->raw) and $User->admin("edit {$Article->link}")) {
+	# open template as initial contents
+	$Article->raw(file_exists("$Page/template.inc.html") ? "$Page/template.inc.html" : 'template.inc.html');
 }
 
-# global html
+if (isset($Article->raw)) {
+	if ($User->admin("edit $Page$Args")) {
+		# restore meta tags in static contents for editing
+		foreach (array_reverse($Article->meta) as $metaprop => $val) {
+			$Article->raw = sprintf(
+				'<meta property="%s" content="%s">'."\n",
+				$metaprop, $val
+			) . $Article->raw;
+		}
+	}
+	$Article->raw = '<div class="static">'."\n\n".$Article->raw."</div>\n\n";
+}
 
-include_once 'page.inc.php';
+# output dynamic and/or static html
 
-if (!$found) {
-	# no resulting output
-	if (isset($User) and $User['admin']) {
-		require './template.html';
+if (!$Page or require("./$Page/index.php")) {
+	# static contents
+	if (isset($Article->raw)) {
+		print $Article->raw;
 	}
 	else {
+		# no resulting output
 		http_response_code(404);
-		ob_start();
-		require "./404.html";
-		$url = htmlspecialchars($_SERVER['REQUEST_URI']);
-		print str_replace('[[url]]', $url, ob_get_clean());
+		@require '404.inc.html';
 	}
 }
 
+include_once 'page.inc.php';
+