nieuws/feed: atom content type and link attributes

[minimedit.git] / page.php

diff --git a/page.php b/page.php
index 9acacc2a949a87cf39e23079615ecb71d8125e66..175c2eb30f71e51c3cbf1509425b1e2987221953 100644 (file)
--- a/page.php
+++ b/page.php
@@ -2,21 +2,133 @@
 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 = [])
+{
+       $path = stream_resolve_include_path("$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';
-       include_once '500.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;
        }
 
@@ -28,44 +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';