X-Git-Url: http://git.shiar.net/minimedit.git/blobdiff_plain/2b56d0fa69a4608fb1b582fca5f08d343f5b90eb..1f8560a20d5d1aa8886688bd7553b8a8fd704fff:/page.php

diff --git a/page.php b/page.php
index f6c2346..175c2eb 100644
--- a/page.php
+++ b/page.php
@@ -2,16 +2,133 @@
 error_reporting(E_ALL);
 ini_set('display_errors', TRUE);
 
+function abort($body, $status = NULL) {
+	if ($status) header("HTTP/1.1 $status");
+	print "$body\n";
+	exit;
+}
+
+function placeholder_include($name, $params = [])
+{
+	$path = stream_resolve_include_path("$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 "$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;
+		}
+	}
+
+	return preg_replace_callback(
+		'< \[\[ ([^] ]+) ([^]]*) \]\] >x',
+		function ($sub) use ($blocks) {
+			list ($placeholder, $name, $params) = $sub;
+			if (isset($blocks[$name])) {
+				$html = $blocks[$name];
+			}
+			else {
+				$html = placeholder_include($name, explode(' ', $params));
+			}
+			return sprintf('<!--BLOCK:%s-->%s<!--/-->',
+				is_numeric($name) ? '' : $placeholder, # edit replacement
+				preg_replace('{<!--[^-]*-->}', '', $html) # contents
+			);
+		},
+		$doc
+	);
+}
+
+# custom error handling
+
+define('DOCROOT', getcwd());
+set_include_path(implode(PATH_SEPARATOR, [ DOCROOT, __DIR__ ]));
+
+function fail($error)
+{
+	http_response_code(500);
+	include_once 'page.inc.php';
+	ob_start();
+	require_once '500.html';
+	print getoutput(['debug' => $error]);
+}
+
+set_exception_handler('fail');
+
+define('E_FATAL', E_ERROR | E_CORE_ERROR | E_COMPILE_ERROR | E_USER_ERROR);
+
+set_error_handler(function ($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]");
+});
+
+error_reporting(error_reporting() & ~E_FATAL);
+
+# user login and control
+
 include_once 'auth.inc.php';
 $Edit = isset($_GET['edit']);
 
 # distinguish subpage Args from topmost Page script
 
 $Args = '';
-$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("$Page.php")) {
+	if (file_exists("$Page/.private")) {
+		# access restriction
+		if (empty($User)) {
+			http_response_code(303);
+			$target = urlencode($_SERVER['REQUEST_URI']);
+			header("Location: /login?goto=$target");
+			exit;
+		}
+		$PageAccess = $Page;
+	}
+
+	if (file_exists("$Page/index.php")) {
 		break;
 	}
 
@@ -23,44 +140,56 @@ while (TRUE) {
 	}
 }
 
-# execute dynamic code
-
-$prepend = $append = '';
-if ($Page) {
-	require "./$Page.php";
-	if (ob_get_level() > 1) $append  = ob_get_clean();
-	if (ob_get_level() > 0) $prepend = ob_get_clean();
+$staticpage = NULL;
+if (file_exists("$Page$Args.html")) {
+	$staticpage = "$Page$Args.html";
+	if (is_link($staticpage)) {
+		$target = preg_replace('/\.html$/', '', readlink($staticpage));
+		header("HTTP/1.1 302 Shorthand");
+		header("Location: $target");
+		exit;
+	}
+}
+elseif (file_exists("$Page$Args/index.html")) {
+	$staticpage = "$Page$Args/index.html";
+}
+elseif (!empty($User['admin'])) {
+	$staticpage = (file_exists("$Page/template.html") ? "$Page/template.html" : 'template.html');
 }
 
-# prepare static contents
+# load static contents
 
-include_once 'page.inc.php'; # global html
+ob_start(); # page body
+ob_start(); # inner html
+print '<div class="static">'."\n\n";
 
-if (file_exists("$Page$Args/index.html")) {
-	$Args .= '/index';
+$found = FALSE;
+if (isset($staticpage)) {
+	$found = include "./$staticpage";
 }
 
-if (!$Page and !file_exists("$Page$Args.html")) {
-	# include not found
-	$Args = '';
-	if (isset($User) and $User['admin']) {
-		$Page = 'template';
-	}
-	else {
-		$Page = '404';
-		require "./$Page.php";
-	}
+print "</div>\n\n";
+
+# execute dynamic code
+
+$Place = [];
+
+if ($Page) {
+	$found |= require "./$Page/index.php";
 }
 
-# output prepared html
+$Place += [
+	'user'  => empty($User) ? '' : $User['name'],
+	'url'   => htmlspecialchars($_SERVER['REQUEST_URI']),
+];
 
-print $prepend;
+# global html
 
-print '<div class="static">'."\n\n";
-if (file_exists("$Page$Args.html")) {
-include "./$Page$Args.html"; # static contents
+if (!$found) {
+	# no resulting output
+	http_response_code(404);
+	@require '404.html';
 }
-print "</div>\n\n";
 
-print $append;
+include_once 'page.inc.php';