/
rcmail_output_html.php
2233 lines (1925 loc) · 77.7 KB
/
rcmail_output_html.php
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<?php
/**
+-----------------------------------------------------------------------+
| program/include/rcmail_output_html.php |
| |
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2006-2014, The Roundcube Dev Team |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| PURPOSE: |
| Class to handle HTML page output using a skin template. |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
*/
/**
* Class to create HTML page output using a skin template
*
* @package Webmail
* @subpackage View
*/
class rcmail_output_html extends rcmail_output
{
public $type = 'html';
protected $message;
protected $template_name;
protected $objects = array();
protected $js_env = array();
protected $js_labels = array();
protected $js_commands = array();
protected $skin_paths = array();
protected $scripts_path = '';
protected $script_files = array();
protected $css_files = array();
protected $scripts = array();
protected $default_template = "<html>\n<head><title></title></head>\n<body></body>\n</html>";
protected $header = '';
protected $footer = '';
protected $body = '';
protected $base_path = '';
protected $assets_path;
protected $assets_dir = RCUBE_INSTALL_PATH;
protected $devel_mode = false;
// deprecated names of templates used before 0.5
protected $deprecated_templates = array(
'contact' => 'showcontact',
'contactadd' => 'addcontact',
'contactedit' => 'editcontact',
'identityedit' => 'editidentity',
'messageprint' => 'printmessage',
);
/**
* Constructor
*/
public function __construct($task = null, $framed = false)
{
parent::__construct();
$this->devel_mode = $this->config->get('devel_mode');
$this->set_env('task', $task);
$this->set_env('standard_windows', (bool) $this->config->get('standard_windows'));
$this->set_env('locale', $_SESSION['language']);
$this->set_env('devel_mode', $this->devel_mode);
// Version number e.g. 1.4.2 will be 10402
$version = explode('.', preg_replace('/[^0-9.].*/', '', RCMAIL_VERSION));
$this->set_env('rcversion', $version[0] * 10000 + $version[1] * 100 + $version[2]);
// add cookie info
$this->set_env('cookie_domain', ini_get('session.cookie_domain'));
$this->set_env('cookie_path', ini_get('session.cookie_path'));
$this->set_env('cookie_secure', filter_var(ini_get('session.cookie_secure'), FILTER_VALIDATE_BOOLEAN));
// load the correct skin (in case user-defined)
$skin = $this->config->get('skin');
$this->set_skin($skin);
$this->set_env('skin', $skin);
$this->set_assets_path($this->config->get('assets_path'), $this->config->get('assets_dir'));
if (!empty($_REQUEST['_extwin']))
$this->set_env('extwin', 1);
if ($this->framed || $framed)
$this->set_env('framed', 1);
$lic = <<<EOF
/*
@licstart The following is the entire license notice for the
JavaScript code in this page.
Copyright (C) 2005-2014 The Roundcube Dev Team
The JavaScript code in this page is free software: you can redistribute
it and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
The code is distributed WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU GPL for more details.
@licend The above is the entire license notice
for the JavaScript code in this page.
*/
EOF;
// add common javascripts
$this->add_script($lic, 'head_top');
$this->add_script('var '.self::JS_OBJECT_NAME.' = new rcube_webmail();', 'head_top');
// don't wait for page onload. Call init at the bottom of the page (delayed)
$this->add_script(self::JS_OBJECT_NAME.'.init();', 'docready');
$this->scripts_path = 'program/js/';
$this->include_script('jquery.min.js');
$this->include_script('common.js');
$this->include_script('app.js');
// register common UI objects
$this->add_handlers(array(
'loginform' => array($this, 'login_form'),
'preloader' => array($this, 'preloader'),
'username' => array($this, 'current_username'),
'message' => array($this, 'message_container'),
'charsetselector' => array($this, 'charset_selector'),
'aboutcontent' => array($this, 'about_content'),
));
}
/**
* Set environment variable
*
* @param string $name Property name
* @param mixed $value Property value
* @param boolean $addtojs True if this property should be added
* to client environment
*/
public function set_env($name, $value, $addtojs = true)
{
$this->env[$name] = $value;
if ($addtojs || isset($this->js_env[$name])) {
$this->js_env[$name] = $value;
}
}
/**
* Parse and set assets path
*
* @param string $path Assets path URL (relative or absolute)
* @param string $fs_dif Assets path in filesystem
*/
public function set_assets_path($path, $fs_dir = null)
{
if (empty($path)) {
return;
}
$path = rtrim($path, '/') . '/';
// handle relative assets path
if (!preg_match('|^https?://|', $path) && $path[0] != '/') {
// save the path to search for asset files later
$this->assets_dir = $path;
$base = preg_replace('/[?#&].*$/', '', $_SERVER['REQUEST_URI']);
$base = rtrim($base, '/');
// remove url token if exists
if ($len = intval($this->config->get('use_secure_urls'))) {
$_base = explode('/', $base);
$last = count($_base) - 1;
$length = $len > 1 ? $len : 16; // as in rcube::get_secure_url_token()
// we can't use real token here because it
// does not exists in unauthenticated state,
// hope this will not produce false-positive matches
if ($last > -1 && preg_match('/^[a-f0-9]{' . $length . '}$/', $_base[$last])) {
$path = '../' . $path;
}
}
}
// set filesystem path for assets
if ($fs_dir) {
if ($fs_dir[0] != '/') {
$fs_dir = realpath(RCUBE_INSTALL_PATH . $fs_dir);
}
// ensure the path ends with a slash
$this->assets_dir = rtrim($fs_dir, '/') . '/';
}
$this->assets_path = $path;
$this->set_env('assets_path', $path);
}
/**
* Getter for the current page title
*
* @return string The page title
*/
protected function get_pagetitle()
{
if (!empty($this->pagetitle)) {
$title = $this->pagetitle;
}
else if ($this->env['task'] == 'login') {
$title = $this->app->gettext(array(
'name' => 'welcome',
'vars' => array('product' => $this->config->get('product_name')
)));
}
else {
$title = ucfirst($this->env['task']);
}
return $title;
}
/**
* Set skin
*
* @param string $skin Skin name
*
* @return bool True if the skin exist and is readable, False otherwise
*/
public function set_skin($skin)
{
// Sanity check to prevent from path traversal vulnerability (#1490620)
if (strpos($skin, '/') !== false || strpos($skin, "\\") !== false) {
rcube::raise_error(array(
'file' => __FILE__,
'line' => __LINE__,
'message' => 'Invalid skin name'
), true, false);
return false;
}
$valid = false;
$path = RCUBE_INSTALL_PATH . 'skins/';
if (!empty($skin) && is_dir($path . $skin) && is_readable($path . $skin)) {
$skin_path = 'skins/' . $skin;
$valid = true;
}
else {
$skin_path = $this->config->get('skin_path');
if (!$skin_path) {
$skin_path = 'skins/' . rcube_config::DEFAULT_SKIN;
}
$valid = !$skin;
}
$skin_path = rtrim($skin_path, '/');
$this->config->set('skin_path', $skin_path);
$this->base_path = $skin_path;
// register skin path(s)
$this->skin_paths = array();
$this->load_skin($skin_path);
return $valid;
}
/**
* Helper method to recursively read skin meta files and register search paths
*/
private function load_skin($skin_path)
{
$this->skin_paths[] = $skin_path;
// read meta file and check for dependencies
$meta = @file_get_contents(RCUBE_INSTALL_PATH . $skin_path . '/meta.json');
$meta = @json_decode($meta, true);
$meta['path'] = $skin_path;
$path_elements = explode('/', $skin_path);
$skin_id = end($path_elements);
if (!$meta['name']) {
$meta['name'] = $skin_id;
}
$this->skins[$skin_id] = $meta;
if ($meta['extends']) {
$path = RCUBE_INSTALL_PATH . 'skins/';
if (is_dir($path . $meta['extends']) && is_readable($path . $meta['extends'])) {
$this->load_skin('skins/' . $meta['extends']);
}
}
foreach ((array) $meta['config'] as $key => $value) {
$this->config->set($key, $value, true);
}
if (!empty($meta['config'])) {
$value = array_merge((array) $this->config->get('dont_override'), array_keys($meta['config']));
$this->config->set('dont_override', $value, true);
}
}
/**
* Check if a specific template exists
*
* @param string $name Template name
*
* @return boolean True if template exists
*/
public function template_exists($name)
{
foreach ($this->skin_paths as $skin_path) {
$filename = RCUBE_INSTALL_PATH . $skin_path . '/templates/' . $name . '.html';
if ((is_file($filename) && is_readable($filename))
|| ($this->deprecated_templates[$name] && $this->template_exists($this->deprecated_templates[$name]))
) {
return true;
}
}
return false;
}
/**
* Find the given file in the current skin path stack
*
* @param string $file File name/path to resolve (starting with /)
* @param string &$skin_path Reference to the base path of the matching skin
* @param string $add_path Additional path to search in
*
* @return mixed Relative path to the requested file or False if not found
*/
public function get_skin_file($file, &$skin_path = null, $add_path = null)
{
$skin_paths = $this->skin_paths;
if ($add_path) {
array_unshift($skin_paths, $add_path);
}
foreach ($skin_paths as $skin_path) {
if (realpath(RCUBE_INSTALL_PATH . $skin_path . $file)) {
return $skin_path . $file;
}
if ($this->assets_dir != RCUBE_INSTALL_PATH) {
if (realpath($this->assets_dir . $skin_path . $file)) {
return $skin_path . $file;
}
}
}
return false;
}
/**
* Register a GUI object to the client script
*
* @param string $obj Object name
* @param string $id Object ID
*/
public function add_gui_object($obj, $id)
{
$this->add_script(self::JS_OBJECT_NAME.".gui_object('$obj', '$id');");
}
/**
* Call a client method
*
* @param string Method to call
* @param ... Additional arguments
*/
public function command()
{
$cmd = func_get_args();
if (strpos($cmd[0], 'plugin.') !== false)
$this->js_commands[] = array('triggerEvent', $cmd[0], $cmd[1]);
else
$this->js_commands[] = $cmd;
}
/**
* Add a localized label to the client environment
*/
public function add_label()
{
$args = func_get_args();
if (count($args) == 1 && is_array($args[0])) {
$args = $args[0];
}
foreach ($args as $name) {
$this->js_labels[$name] = $this->app->gettext($name);
}
}
/**
* Invoke display_message command
*
* @param string $message Message to display
* @param string $type Message type [notice|confirm|error]
* @param array $vars Key-value pairs to be replaced in localized text
* @param boolean $override Override last set message
* @param int $timeout Message display time in seconds
*
* @uses self::command()
*/
public function show_message($message, $type='notice', $vars=null, $override=true, $timeout=0)
{
if ($override || !$this->message) {
if ($this->app->text_exists($message)) {
if (!empty($vars))
$vars = array_map(array('rcube','Q'), $vars);
$msgtext = $this->app->gettext(array('name' => $message, 'vars' => $vars));
}
else
$msgtext = $message;
$this->message = $message;
$this->command('display_message', $msgtext, $type, $timeout * 1000);
}
}
/**
* Delete all stored env variables and commands
*
* @param bool $all Reset all env variables (including internal)
*/
public function reset($all = false)
{
$framed = $this->framed;
$env = $all ? null : array_intersect_key($this->env, array('extwin'=>1, 'framed'=>1));
parent::reset();
// let some env variables survive
$this->env = $this->js_env = $env;
$this->framed = $framed || $this->env['framed'];
$this->js_labels = array();
$this->js_commands = array();
$this->script_files = array();
$this->scripts = array();
$this->header = '';
$this->footer = '';
$this->body = '';
// load defaults
if (!$all) {
$this->__construct();
}
}
/**
* Redirect to a certain url
*
* @param mixed $p Either a string with the action or url parameters as key-value pairs
* @param int $delay Delay in seconds
* @param bool $secure Redirect to secure location (see rcmail::url())
*/
public function redirect($p = array(), $delay = 1, $secure = false)
{
if ($this->env['extwin'])
$p['extwin'] = 1;
$location = $this->app->url($p, false, false, $secure);
header('Location: ' . $location);
exit;
}
/**
* Send the request output to the client.
* This will either parse a skin tempalte or send an AJAX response
*
* @param string $templ Template name
* @param boolean $exit True if script should terminate (default)
*/
public function send($templ = null, $exit = true)
{
if ($templ != 'iframe') {
// prevent from endless loops
if ($exit != 'recur' && $this->app->plugins->is_processing('render_page')) {
rcube::raise_error(array('code' => 505, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => 'Recursion alert: ignoring output->send()'), true, false);
return;
}
$this->parse($templ, false);
}
else {
$this->framed = true;
$this->write();
}
// set output asap
ob_flush();
flush();
if ($exit) {
exit;
}
}
/**
* Process template and write to stdOut
*
* @param string $template HTML template content
*/
public function write($template = '')
{
if (!empty($this->script_files)) {
$this->set_env('request_token', $this->app->get_request_token());
}
$commands = $this->get_js_commands($framed);
// if all js commands go to parent window we can ignore all
// script files and skip rcube_webmail initialization (#1489792)
if ($framed) {
$this->scripts = array();
$this->script_files = array();
$this->header = '';
$this->footer = '';
}
// write all javascript commands
if (!empty($commands)) {
$this->add_script($commands, 'head_top');
}
// allow (legal) iframe content to be loaded
$iframe = $this->framed || $this->env['framed'];
if (!headers_sent() && $iframe && ($xopt = $this->app->config->get('x_frame_options', 'sameorigin'))) {
if (strtolower($xopt) != 'sameorigin') {
header('X-Frame-Options: sameorigin', true);
}
}
// call super method
$this->_write($template, $this->config->get('skin_path'));
}
/**
* Parse a specific skin template and deliver to stdout (or return)
*
* @param string $name Template name
* @param boolean $exit Exit script
* @param boolean $write Don't write to stdout, return parsed content instead
*
* @link http://php.net/manual/en/function.exit.php
*/
function parse($name = 'main', $exit = true, $write = true)
{
$plugin = false;
$realname = $name;
$plugin_skin_paths = array();
$this->template_name = $realname;
$temp = explode('.', $name, 2);
if (count($temp) > 1) {
$plugin = $temp[0];
$name = $temp[1];
$skin_dir = $plugin . '/skins/' . $this->config->get('skin');
// apply skin search escalation list to plugin directory
foreach ($this->skin_paths as $skin_path) {
$plugin_skin_paths[] = $this->app->plugins->url . $plugin . '/' . $skin_path;
}
// add fallback to default skin
if (is_dir($this->app->plugins->dir . $plugin . '/skins/default')) {
$skin_dir = $plugin . '/skins/default';
$plugin_skin_paths[] = $this->app->plugins->url . $skin_dir;
}
// prepend plugin skin paths to search list
$this->skin_paths = array_merge($plugin_skin_paths, $this->skin_paths);
}
// find skin template
$path = false;
foreach ($this->skin_paths as $skin_path) {
$path = RCUBE_INSTALL_PATH . "$skin_path/templates/$name.html";
// fallback to deprecated template names
if (!is_readable($path) && ($dname = $this->deprecated_templates[$realname])) {
$path = RCUBE_INSTALL_PATH . "$skin_path/templates/$dname.html";
if (is_readable($path)) {
rcube::raise_error(array(
'code' => 502, 'file' => __FILE__, 'line' => __LINE__,
'message' => "Using deprecated template '$dname' in $skin_path/templates. Please rename to '$realname'"
), true, false);
}
}
if (is_readable($path)) {
$this->config->set('skin_path', $skin_path);
// set base_path to core skin directory (not plugin's skin)
$this->base_path = preg_replace('!plugins/\w+/!', '', $skin_path);
$skin_dir = preg_replace('!^plugins/!', '', $skin_path);
break;
}
else {
$path = false;
}
}
// read template file
if (!$path || ($templ = @file_get_contents($path)) === false) {
rcube::raise_error(array(
'code' => 404,
'type' => 'php',
'line' => __LINE__,
'file' => __FILE__,
'message' => 'Error loading template for '.$realname
), true, $write);
$this->skin_paths = array_slice($this->skin_paths, count($plugin_skin_paths));
return false;
}
// replace all path references to plugins/... with the configured plugins dir
// and /this/ to the current plugin skin directory
if ($plugin) {
$templ = preg_replace(
array('/\bplugins\//', '/(["\']?)\/this\//'),
array($this->app->plugins->url, '\\1'.$this->app->plugins->url.$skin_dir.'/'),
$templ
);
}
// parse for specialtags
$output = $this->parse_conditions($templ);
$output = $this->parse_xml($output);
// trigger generic hook where plugins can put additional content to the page
$hook = $this->app->plugins->exec_hook("render_page", array(
'template' => $realname, 'content' => $output, 'write' => $write));
// save some memory
$output = $hook['content'];
unset($hook['content']);
// remove plugin skin paths from current context
$this->skin_paths = array_slice($this->skin_paths, count($plugin_skin_paths));
if (!$write) {
return $this->postrender($output);
}
$this->write(trim($output));
if ($exit) {
exit;
}
}
/**
* Return executable javascript code for all registered commands
*/
protected function get_js_commands(&$framed = null)
{
$out = '';
$parent_commands = 0;
$top_commands = array();
// these should be always on top,
// e.g. hide_message() below depends on env.framed
if (!$this->framed && !empty($this->js_env)) {
$top_commands[] = array('set_env', $this->js_env);
}
if (!empty($this->js_labels)) {
$top_commands[] = array('add_label', $this->js_labels);
}
// unlock interface after iframe load
$unlock = preg_replace('/[^a-z0-9]/i', '', $_REQUEST['_unlock']);
if ($this->framed) {
$top_commands[] = array('iframe_loaded', $unlock);
}
else if ($unlock) {
$top_commands[] = array('hide_message', $unlock);
}
$commands = array_merge($top_commands, $this->js_commands);
foreach ($commands as $i => $args) {
$method = array_shift($args);
$parent = $this->framed || preg_match('/^parent\./', $method);
foreach ($args as $i => $arg) {
$args[$i] = self::json_serialize($arg, $this->devel_mode);
}
if ($parent) {
$parent_commands++;
$method = preg_replace('/^parent\./', '', $method);
$parent_prefix = 'if (window.parent && parent.' . self::JS_OBJECT_NAME . ') parent.';
$method = $parent_prefix . self::JS_OBJECT_NAME . '.' . $method;
}
else {
$method = self::JS_OBJECT_NAME . '.' . $method;
}
$out .= sprintf("%s(%s);\n", $method, implode(',', $args));
}
$framed = $parent_prefix && $parent_commands == count($commands);
// make the output more compact if all commands go to parent window
if ($framed) {
$out = "if (window.parent && parent." . self::JS_OBJECT_NAME . ") {\n"
. str_replace($parent_prefix, "\tparent.", $out)
. "}\n";
}
return $out;
}
/**
* Make URLs starting with a slash point to skin directory
*
* @param string $str Input string
* @param bool $search_path True if URL should be resolved using the current skin path stack
*
* @return string URL
*/
public function abs_url($str, $search_path = false)
{
if ($str[0] == '/') {
if ($search_path && ($file_url = $this->get_skin_file($str, $skin_path))) {
return $file_url;
}
return $this->base_path . $str;
}
return $str;
}
/**
* Show error page and terminate script execution
*
* @param int $code Error code
* @param string $message Error message
*/
public function raise_error($code, $message)
{
global $__page_content, $ERROR_CODE, $ERROR_MESSAGE;
$ERROR_CODE = $code;
$ERROR_MESSAGE = $message;
include RCUBE_INSTALL_PATH . 'program/steps/utils/error.inc';
exit;
}
/**
* Modify path by adding URL prefix if configured
*/
public function asset_url($path)
{
// iframe content can't be in a different domain
// @TODO: check if assests are on a different domain
if (!$this->assets_path || in_array($path[0], array('?', '/', '.')) || strpos($path, '://')) {
return $path;
}
return $this->assets_path . $path;
}
/***** Template parsing methods *****/
/**
* Replace all strings ($varname)
* with the content of the according global variable.
*/
protected function parse_with_globals($input)
{
$GLOBALS['__version'] = html::quote(RCMAIL_VERSION);
$GLOBALS['__comm_path'] = html::quote($this->app->comm_path);
$GLOBALS['__skin_path'] = html::quote($this->base_path);
return preg_replace_callback('/\$(__[a-z0-9_\-]+)/',
array($this, 'globals_callback'), $input);
}
/**
* Callback function for preg_replace_callback() in parse_with_globals()
*/
protected function globals_callback($matches)
{
return $GLOBALS[$matches[1]];
}
/**
* Correct absolute paths in images and other tags
* add timestamp to .js and .css filename
*/
protected function fix_paths($output)
{
return preg_replace_callback(
'!(src|href|background)=(["\']?)([a-z0-9/_.-]+)(["\'\s>])!i',
array($this, 'file_callback'), $output);
}
/**
* Callback function for preg_replace_callback in fix_paths()
*
* @return string Parsed string
*/
protected function file_callback($matches)
{
$file = $matches[3];
$file = preg_replace('!^/this/!', '/', $file);
// correct absolute paths
if ($file[0] == '/') {
$this->get_skin_file($file, $skin_path);
$file = $skin_path . $file;
}
// add file modification timestamp
if (preg_match('/\.(js|css)$/', $file, $m)) {
$file = $this->file_mod($file);
}
return $matches[1] . '=' . $matches[2] . $file . $matches[4];
}
/**
* Correct paths of asset files according to assets_path
*/
protected function fix_assets_paths($output)
{
return preg_replace_callback(
'!(src|href|background)=(["\']?)([a-z0-9/_.?=-]+)(["\'\s>])!i',
array($this, 'assets_callback'), $output);
}
/**
* Callback function for preg_replace_callback in fix_assets_paths()
*
* @return string Parsed string
*/
protected function assets_callback($matches)
{
$file = $this->asset_url($matches[3]);
return $matches[1] . '=' . $matches[2] . $file . $matches[4];
}
/**
* Modify file by adding mtime indicator
*/
protected function file_mod($file)
{
$fs = false;
$ext = substr($file, strrpos($file, '.') + 1);
// use minified file if exists (not in development mode)
if (!$this->devel_mode && !preg_match('/\.min\.' . $ext . '$/', $file)) {
$minified_file = substr($file, 0, strlen($ext) * -1) . 'min.' . $ext;
if ($fs = @filemtime($this->assets_dir . $minified_file)) {
return $minified_file . '?s=' . $fs;
}
}
if ($fs = @filemtime($this->assets_dir . $file)) {
$file .= '?s=' . $fs;
}
return $file;
}
/**
* Public wrapper to dipp into template parsing.
*
* @param string $input Template content
*
* @return string
* @uses rcmail_output_html::parse_xml()
* @since 0.1-rc1
*/
public function just_parse($input)
{
$input = $this->parse_conditions($input);
$input = $this->parse_xml($input);
$input = $this->postrender($input);
return $input;
}
/**
* Parse for conditional tags
*/
protected function parse_conditions($input)
{
$matches = preg_split('/<roundcube:(if|elseif|else|endif)\s+([^>]+)>\n?/is', $input, 2, PREG_SPLIT_DELIM_CAPTURE);
if ($matches && count($matches) == 4) {
if (preg_match('/^(else|endif)$/i', $matches[1])) {
return $matches[0] . $this->parse_conditions($matches[3]);
}
$attrib = html::parse_attrib_string($matches[2]);
if (isset($attrib['condition'])) {
$condmet = $this->check_condition($attrib['condition']);
$submatches = preg_split('/<roundcube:(elseif|else|endif)\s+([^>]+)>\n?/is', $matches[3], 2, PREG_SPLIT_DELIM_CAPTURE);
if ($condmet) {
$result = $submatches[0];
if ($submatches[1] != 'endif') {
$result .= preg_replace('/.*<roundcube:endif\s+[^>]+>\n?/Uis', '', $submatches[3], 1);
}
else {
$result .= $submatches[3];
}
}
else {
$result = "<roundcube:$submatches[1] $submatches[2]>" . $submatches[3];
}
return $matches[0] . $this->parse_conditions($result);
}
rcube::raise_error(array(
'code' => 500, 'line' => __LINE__, 'file' => __FILE__,
'message' => "Unable to parse conditional tag " . $matches[2]
), true, false);
}
return $input;
}
/**
* Determines if a given condition is met
*
* @param string $condition Condition statement
*
* @return boolean True if condition is met, False if not
* @todo Extend this to allow real conditions, not just "set"
*/
protected function check_condition($condition)
{
return $this->eval_expression($condition);
}
/**
* Inserts hidden field with CSRF-prevention-token into POST forms
*/
protected function alter_form_tag($matches)
{
$out = $matches[0];
$attrib = html::parse_attrib_string($matches[1]);
if (strtolower($attrib['method']) == 'post') {
$hidden = new html_hiddenfield(array('name' => '_token', 'value' => $this->app->get_request_token()));
$out .= "\n" . $hidden->show();
}
return $out;
}
/**
* Parse & evaluate a given expression and return its result.
*
* @param string $expression Expression statement
*
* @return mixed Expression result
*/
protected function eval_expression($expression)
{
$expression = preg_replace(
array(
'/session:([a-z0-9_]+)/i',
'/config:([a-z0-9_]+)(:([a-z0-9_]+))?/i',
'/env:([a-z0-9_]+)/i',
'/request:([a-z0-9_]+)/i',
'/cookie:([a-z0-9_]+)/i',
'/browser:([a-z0-9_]+)/i',
'/template:name/i',
),
array(
"\$_SESSION['\\1']",
"\$this->app->config->get('\\1',rcube_utils::get_boolean('\\3'))",
"\$this->env['\\1']",