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efrain |
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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Library of functions for web output
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*
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* Library of all general-purpose Moodle PHP functions and constants
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* that produce HTML output
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*
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* Other main libraries:
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* - datalib.php - functions that access the database.
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* - moodlelib.php - general-purpose Moodle functions.
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*
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* @package core
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* @subpackage lib
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* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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// Constants.
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// Define text formatting types ... eventually we can add Wiki, BBcode etc.
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/**
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* Does all sorts of transformations and filtering.
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*/
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define('FORMAT_MOODLE', '0');
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/**
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* Plain HTML (with some tags stripped).
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*/
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define('FORMAT_HTML', '1');
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/**
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* Plain text (even tags are printed in full).
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*/
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define('FORMAT_PLAIN', '2');
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/**
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* Wiki-formatted text.
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* Deprecated: left here just to note that '3' is not used (at the moment)
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* and to catch any latent wiki-like text (which generates an error)
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* @deprecated since 2005!
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*/
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define('FORMAT_WIKI', '3');
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/**
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* Markdown-formatted text http://daringfireball.net/projects/markdown/
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*/
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define('FORMAT_MARKDOWN', '4');
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/**
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* A moodle_url comparison using this flag will return true if the base URLs match, params are ignored.
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*/
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define('URL_MATCH_BASE', 0);
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/**
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* A moodle_url comparison using this flag will return true if the base URLs match and the params of url1 are part of url2.
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*/
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define('URL_MATCH_PARAMS', 1);
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/**
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* A moodle_url comparison using this flag will return true if the two URLs are identical, except for the order of the params.
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*/
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define('URL_MATCH_EXACT', 2);
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// Functions.
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/**
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* Add quotes to HTML characters.
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*
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* Returns $var with HTML characters (like "<", ">", etc.) properly quoted.
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* Related function {@link p()} simply prints the output of this function.
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*
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* @param string $var the string potentially containing HTML characters
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* @return string
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*/
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function s($var) {
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if ($var === false) {
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return '0';
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}
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if ($var === null || $var === '') {
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return '';
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}
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return preg_replace(
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'/&#(\d+|x[0-9a-f]+);/i', '&#$1;',
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htmlspecialchars($var, ENT_QUOTES | ENT_HTML401 | ENT_SUBSTITUTE)
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);
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}
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/**
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* Add quotes to HTML characters.
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*
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* Prints $var with HTML characters (like "<", ">", etc.) properly quoted.
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* This function simply calls & displays {@link s()}.
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* @see s()
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*
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* @param string $var the string potentially containing HTML characters
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*/
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function p($var) {
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echo s($var);
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}
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/**
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* Does proper javascript quoting.
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*
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* Do not use addslashes anymore, because it does not work when magic_quotes_sybase is enabled.
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*
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* @param mixed $var String, Array, or Object to add slashes to
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* @return mixed quoted result
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*/
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function addslashes_js($var) {
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if (is_string($var)) {
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$var = str_replace('\\', '\\\\', $var);
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$var = str_replace(array('\'', '"', "\n", "\r", "\0"), array('\\\'', '\\"', '\\n', '\\r', '\\0'), $var);
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$var = str_replace('</', '<\/', $var); // XHTML compliance.
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} else if (is_array($var)) {
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$var = array_map('addslashes_js', $var);
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} else if (is_object($var)) {
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$a = get_object_vars($var);
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foreach ($a as $key => $value) {
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$a[$key] = addslashes_js($value);
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}
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$var = (object)$a;
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}
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return $var;
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}
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/**
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* Remove query string from url.
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*
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* Takes in a URL and returns it without the querystring portion.
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*
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* @param string $url the url which may have a query string attached.
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* @return string The remaining URL.
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*/
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function strip_querystring($url) {
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if ($url === null || $url === '') {
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return '';
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}
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if ($commapos = strpos($url, '?')) {
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return substr($url, 0, $commapos);
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} else {
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return $url;
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}
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}
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/**
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* Returns the name of the current script, WITH the querystring portion.
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*
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* This function is necessary because PHP_SELF and REQUEST_URI and SCRIPT_NAME
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* return different things depending on a lot of things like your OS, Web
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* server, and the way PHP is compiled (ie. as a CGI, module, ISAPI, etc.)
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* <b>NOTE:</b> This function returns false if the global variables needed are not set.
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*
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* @return mixed String or false if the global variables needed are not set.
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*/
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function me() {
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global $ME;
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return $ME;
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}
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/**
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* Guesses the full URL of the current script.
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*
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* This function is using $PAGE->url, but may fall back to $FULLME which
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* is constructed from PHP_SELF and REQUEST_URI or SCRIPT_NAME
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*
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* @return mixed full page URL string or false if unknown
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*/
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function qualified_me() {
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global $FULLME, $PAGE, $CFG;
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if (isset($PAGE) and $PAGE->has_set_url()) {
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// This is the only recommended way to find out current page.
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return $PAGE->url->out(false);
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} else {
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if ($FULLME === null) {
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// CLI script most probably.
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return false;
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}
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if (!empty($CFG->sslproxy)) {
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// Return only https links when using SSL proxy.
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return preg_replace('/^http:/', 'https:', $FULLME, 1);
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} else {
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return $FULLME;
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}
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}
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}
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/**
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* Determines whether or not the Moodle site is being served over HTTPS.
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*
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* This is done simply by checking the value of $CFG->wwwroot, which seems
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* to be the only reliable method.
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*
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* @return boolean True if site is served over HTTPS, false otherwise.
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*/
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function is_https() {
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global $CFG;
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return (strpos($CFG->wwwroot, 'https://') === 0);
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}
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/**
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* Returns the cleaned local URL of the HTTP_REFERER less the URL query string parameters if required.
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*
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* @param bool $stripquery if true, also removes the query part of the url.
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* @return string The resulting referer or empty string.
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*/
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function get_local_referer($stripquery = true) {
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if (isset($_SERVER['HTTP_REFERER'])) {
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$referer = clean_param($_SERVER['HTTP_REFERER'], PARAM_LOCALURL);
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if ($stripquery) {
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return strip_querystring($referer);
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} else {
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return $referer;
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}
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} else {
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return '';
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}
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}
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/**
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* Determine if there is data waiting to be processed from a form
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*
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* Used on most forms in Moodle to check for data
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* Returns the data as an object, if it's found.
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* This object can be used in foreach loops without
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* casting because it's cast to (array) automatically
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*
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* Checks that submitted POST data exists and returns it as object.
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*
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* @return mixed false or object
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*/
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function data_submitted() {
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if (empty($_POST)) {
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return false;
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} else {
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return (object)fix_utf8($_POST);
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}
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}
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/**
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* Given some normal text this function will break up any
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* long words to a given size by inserting the given character
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*
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* It's multibyte savvy and doesn't change anything inside html tags.
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*
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* @param string $string the string to be modified
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* @param int $maxsize maximum length of the string to be returned
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* @param string $cutchar the string used to represent word breaks
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* @return string
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*/
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function break_up_long_words($string, $maxsize=20, $cutchar=' ') {
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// First of all, save all the tags inside the text to skip them.
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$tags = array();
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filter_save_tags($string, $tags);
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// Process the string adding the cut when necessary.
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$output = '';
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$length = core_text::strlen($string);
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$wordlength = 0;
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for ($i=0; $i<$length; $i++) {
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$char = core_text::substr($string, $i, 1);
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if ($char == ' ' or $char == "\t" or $char == "\n" or $char == "\r" or $char == "<" or $char == ">") {
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$wordlength = 0;
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} else {
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$wordlength++;
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if ($wordlength > $maxsize) {
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$output .= $cutchar;
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$wordlength = 0;
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}
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}
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$output .= $char;
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}
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// Finally load the tags back again.
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if (!empty($tags)) {
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$output = str_replace(array_keys($tags), $tags, $output);
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}
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return $output;
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}
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/**
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* Try and close the current window using JavaScript, either immediately, or after a delay.
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*
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* Echo's out the resulting XHTML & javascript
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*
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* @param integer $delay a delay in seconds before closing the window. Default 0.
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* @param boolean $reloadopener if true, we will see if this window was a pop-up, and try
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* to reload the parent window before this one closes.
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*/
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function close_window($delay = 0, $reloadopener = false) {
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global $PAGE, $OUTPUT;
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if (!$PAGE->headerprinted) {
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$PAGE->set_title(get_string('closewindow'));
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echo $OUTPUT->header();
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} else {
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$OUTPUT->container_end_all(false);
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}
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if ($reloadopener) {
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// Trigger the reload immediately, even if the reload is after a delay.
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$PAGE->requires->js_function_call('window.opener.location.reload', array(true));
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}
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$OUTPUT->notification(get_string('windowclosing'), 'notifysuccess');
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$PAGE->requires->js_function_call('close_window', array(new stdClass()), false, $delay);
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echo $OUTPUT->footer();
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exit;
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}
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/**
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* Returns a string containing a link to the user documentation for the current page.
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*
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* Also contains an icon by default. Shown to teachers and admin only.
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*
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* @param string $text The text to be displayed for the link
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* @return string The link to user documentation for this current page
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*/
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function page_doc_link($text='') {
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global $OUTPUT, $PAGE;
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$path = page_get_doc_link_path($PAGE);
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if (!$path) {
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return '';
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}
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return $OUTPUT->doc_link($path, $text);
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}
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/**
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* Returns the path to use when constructing a link to the docs.
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*
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* @since Moodle 2.5.1 2.6
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* @param moodle_page $page
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* @return string
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*/
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function page_get_doc_link_path(moodle_page $page) {
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global $CFG;
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if (empty($CFG->docroot) || during_initial_install()) {
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return '';
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}
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if (!has_capability('moodle/site:doclinks', $page->context)) {
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return '';
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}
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$path = $page->docspath;
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|
374 |
if (!$path) {
|
|
|
375 |
return '';
|
|
|
376 |
}
|
|
|
377 |
return $path;
|
|
|
378 |
}
|
|
|
379 |
|
|
|
380 |
|
|
|
381 |
/**
|
|
|
382 |
* Validates an email to make sure it makes sense.
|
|
|
383 |
*
|
|
|
384 |
* @param string $address The email address to validate.
|
|
|
385 |
* @return boolean
|
|
|
386 |
*/
|
|
|
387 |
function validate_email($address) {
|
|
|
388 |
global $CFG;
|
|
|
389 |
|
|
|
390 |
if ($address === null || $address === false || $address === '') {
|
|
|
391 |
return false;
|
|
|
392 |
}
|
|
|
393 |
|
|
|
394 |
require_once("{$CFG->libdir}/phpmailer/moodle_phpmailer.php");
|
|
|
395 |
|
|
|
396 |
return moodle_phpmailer::validateAddress($address ?? '') && !preg_match('/[<>]/', $address);
|
|
|
397 |
}
|
|
|
398 |
|
|
|
399 |
/**
|
|
|
400 |
* Extracts file argument either from file parameter or PATH_INFO
|
|
|
401 |
*
|
|
|
402 |
* Note: $scriptname parameter is not needed anymore
|
|
|
403 |
*
|
|
|
404 |
* @return string file path (only safe characters)
|
|
|
405 |
*/
|
|
|
406 |
function get_file_argument() {
|
|
|
407 |
global $SCRIPT;
|
|
|
408 |
|
|
|
409 |
$relativepath = false;
|
|
|
410 |
$hasforcedslashargs = false;
|
|
|
411 |
|
|
|
412 |
if (isset($_SERVER['REQUEST_URI']) && !empty($_SERVER['REQUEST_URI'])) {
|
|
|
413 |
// Checks whether $_SERVER['REQUEST_URI'] contains '/pluginfile.php/'
|
|
|
414 |
// instead of '/pluginfile.php?', when serving a file from e.g. mod_imscp or mod_scorm.
|
|
|
415 |
if ((strpos($_SERVER['REQUEST_URI'], '/pluginfile.php/') !== false)
|
|
|
416 |
&& isset($_SERVER['PATH_INFO']) && !empty($_SERVER['PATH_INFO'])) {
|
|
|
417 |
// Exclude edge cases like '/pluginfile.php/?file='.
|
|
|
418 |
$args = explode('/', ltrim($_SERVER['PATH_INFO'], '/'));
|
|
|
419 |
$hasforcedslashargs = (count($args) > 2); // Always at least: context, component and filearea.
|
|
|
420 |
}
|
|
|
421 |
}
|
|
|
422 |
if (!$hasforcedslashargs) {
|
|
|
423 |
$relativepath = optional_param('file', false, PARAM_PATH);
|
|
|
424 |
}
|
|
|
425 |
|
|
|
426 |
if ($relativepath !== false and $relativepath !== '') {
|
|
|
427 |
return $relativepath;
|
|
|
428 |
}
|
|
|
429 |
$relativepath = false;
|
|
|
430 |
|
|
|
431 |
// Then try extract file from the slasharguments.
|
|
|
432 |
if (stripos($_SERVER['SERVER_SOFTWARE'], 'iis') !== false) {
|
|
|
433 |
// NOTE: IIS tends to convert all file paths to single byte DOS encoding,
|
|
|
434 |
// we can not use other methods because they break unicode chars,
|
|
|
435 |
// the only ways are to use URL rewriting
|
|
|
436 |
// OR
|
|
|
437 |
// to properly set the 'FastCGIUtf8ServerVariables' registry key.
|
|
|
438 |
if (isset($_SERVER['PATH_INFO']) and $_SERVER['PATH_INFO'] !== '') {
|
|
|
439 |
// Check that PATH_INFO works == must not contain the script name.
|
|
|
440 |
if (strpos($_SERVER['PATH_INFO'], $SCRIPT) === false) {
|
|
|
441 |
$relativepath = clean_param(urldecode($_SERVER['PATH_INFO']), PARAM_PATH);
|
|
|
442 |
}
|
|
|
443 |
}
|
|
|
444 |
} else {
|
|
|
445 |
// All other apache-like servers depend on PATH_INFO.
|
|
|
446 |
if (isset($_SERVER['PATH_INFO'])) {
|
|
|
447 |
if (isset($_SERVER['SCRIPT_NAME']) and strpos($_SERVER['PATH_INFO'], $_SERVER['SCRIPT_NAME']) === 0) {
|
|
|
448 |
$relativepath = substr($_SERVER['PATH_INFO'], strlen($_SERVER['SCRIPT_NAME']));
|
|
|
449 |
} else {
|
|
|
450 |
$relativepath = $_SERVER['PATH_INFO'];
|
|
|
451 |
}
|
|
|
452 |
$relativepath = clean_param($relativepath, PARAM_PATH);
|
|
|
453 |
}
|
|
|
454 |
}
|
|
|
455 |
|
|
|
456 |
return $relativepath;
|
|
|
457 |
}
|
|
|
458 |
|
|
|
459 |
/**
|
|
|
460 |
* Just returns an array of text formats suitable for a popup menu
|
|
|
461 |
*
|
|
|
462 |
* @return array
|
|
|
463 |
*/
|
|
|
464 |
function format_text_menu() {
|
|
|
465 |
return array (FORMAT_MOODLE => get_string('formattext'),
|
|
|
466 |
FORMAT_HTML => get_string('formathtml'),
|
|
|
467 |
FORMAT_PLAIN => get_string('formatplain'),
|
|
|
468 |
FORMAT_MARKDOWN => get_string('formatmarkdown'));
|
|
|
469 |
}
|
|
|
470 |
|
|
|
471 |
/**
|
|
|
472 |
* Given text in a variety of format codings, this function returns the text as safe HTML.
|
|
|
473 |
*
|
|
|
474 |
* This function should mainly be used for long strings like posts,
|
|
|
475 |
* answers, glossary items etc. For short strings {@link format_string()}.
|
|
|
476 |
*
|
|
|
477 |
* <pre>
|
|
|
478 |
* Options:
|
|
|
479 |
* trusted : If true the string won't be cleaned. Default false required noclean=true.
|
|
|
480 |
* noclean : If true the string won't be cleaned, unless $CFG->forceclean is set. Default false required trusted=true.
|
|
|
481 |
* filter : If true the string will be run through applicable filters as well. Default true.
|
|
|
482 |
* para : If true then the returned string will be wrapped in div tags. Default true.
|
|
|
483 |
* newlines : If true then lines newline breaks will be converted to HTML newline breaks. Default true.
|
|
|
484 |
* context : The context that will be used for filtering.
|
|
|
485 |
* overflowdiv : If set to true the formatted text will be encased in a div
|
|
|
486 |
* with the class no-overflow before being returned. Default false.
|
|
|
487 |
* allowid : If true then id attributes will not be removed, even when
|
|
|
488 |
* using htmlpurifier. Default false.
|
|
|
489 |
* blanktarget : If true all <a> tags will have target="_blank" added unless target is explicitly specified.
|
|
|
490 |
* </pre>
|
|
|
491 |
*
|
|
|
492 |
* @param string $text The text to be formatted. This is raw text originally from user input.
|
|
|
493 |
* @param int $format Identifier of the text format to be used
|
|
|
494 |
* [FORMAT_MOODLE, FORMAT_HTML, FORMAT_PLAIN, FORMAT_MARKDOWN]
|
|
|
495 |
* @param stdClass|array $options text formatting options
|
|
|
496 |
* @param int $courseiddonotuse deprecated course id, use context option instead
|
|
|
497 |
* @return string
|
|
|
498 |
*/
|
|
|
499 |
function format_text($text, $format = FORMAT_MOODLE, $options = null, $courseiddonotuse = null) {
|
|
|
500 |
global $CFG;
|
|
|
501 |
|
|
|
502 |
// Manually include the formatting class for now until after the release after 4.5 LTS.
|
|
|
503 |
require_once("{$CFG->libdir}/classes/formatting.php");
|
|
|
504 |
|
|
|
505 |
if ($format === FORMAT_WIKI) {
|
|
|
506 |
// This format was deprecated in Moodle 1.5.
|
|
|
507 |
throw new \coding_exception(
|
|
|
508 |
'Wiki-like formatting is not supported.'
|
|
|
509 |
);
|
|
|
510 |
}
|
|
|
511 |
|
|
|
512 |
if ($options instanceof \core\context) {
|
|
|
513 |
// A common mistake has been to call this function with a context object.
|
|
|
514 |
// This has never been expected, or nor supported.
|
|
|
515 |
debugging(
|
|
|
516 |
'The options argument should not be a context object directly. ' .
|
|
|
517 |
' Please pass an array with a context key instead.',
|
|
|
518 |
DEBUG_DEVELOPER,
|
|
|
519 |
);
|
|
|
520 |
$params['context'] = $options;
|
|
|
521 |
$options = [];
|
|
|
522 |
}
|
|
|
523 |
|
|
|
524 |
if ($options) {
|
|
|
525 |
$options = (array) $options;
|
|
|
526 |
}
|
|
|
527 |
|
|
|
528 |
if (empty($CFG->version) || $CFG->version < 2013051400 || during_initial_install()) {
|
|
|
529 |
// Do not filter anything during installation or before upgrade completes.
|
|
|
530 |
$params['context'] = null;
|
|
|
531 |
} else if ($options && isset($options['context'])) { // First by explicit passed context option.
|
|
|
532 |
if (is_numeric($options['context'])) {
|
|
|
533 |
// A contextid was passed.
|
|
|
534 |
$params['context'] = \core\context::instance_by_id($options['context']);
|
|
|
535 |
} else if ($options['context'] instanceof \core\context) {
|
|
|
536 |
$params['context'] = $options['context'];
|
|
|
537 |
} else {
|
|
|
538 |
debugging(
|
|
|
539 |
'Unknown context passed to format_text(). Content will not be filtered.',
|
|
|
540 |
DEBUG_DEVELOPER,
|
|
|
541 |
);
|
|
|
542 |
}
|
|
|
543 |
|
|
|
544 |
// Unset the context from $options to prevent it overriding the configured value.
|
|
|
545 |
unset($options['context']);
|
|
|
546 |
} else if ($courseiddonotuse) {
|
|
|
547 |
// Legacy courseid.
|
|
|
548 |
$params['context'] = \core\context\course::instance($courseiddonotuse);
|
|
|
549 |
debugging(
|
|
|
550 |
"Passing a courseid to format_text() is deprecated, please pass a context instead.",
|
|
|
551 |
DEBUG_DEVELOPER,
|
|
|
552 |
);
|
|
|
553 |
}
|
|
|
554 |
|
|
|
555 |
$params['text'] = $text;
|
|
|
556 |
|
|
|
557 |
if ($options) {
|
|
|
558 |
// The smiley option was deprecated in Moodle 2.0.
|
|
|
559 |
if (array_key_exists('smiley', $options)) {
|
|
|
560 |
unset($options['smiley']);
|
|
|
561 |
debugging(
|
|
|
562 |
'The smiley option is deprecated and no longer used.',
|
|
|
563 |
DEBUG_DEVELOPER,
|
|
|
564 |
);
|
|
|
565 |
}
|
|
|
566 |
|
|
|
567 |
// The nocache option was deprecated in Moodle 2.3 in MDL-34347.
|
|
|
568 |
if (array_key_exists('nocache', $options)) {
|
|
|
569 |
unset($options['nocache']);
|
|
|
570 |
debugging(
|
|
|
571 |
'The nocache option is deprecated and no longer used.',
|
|
|
572 |
DEBUG_DEVELOPER,
|
|
|
573 |
);
|
|
|
574 |
}
|
|
|
575 |
|
|
|
576 |
$validoptions = [
|
|
|
577 |
'text',
|
|
|
578 |
'format',
|
|
|
579 |
'context',
|
|
|
580 |
'trusted',
|
|
|
581 |
'clean',
|
|
|
582 |
'filter',
|
|
|
583 |
'para',
|
|
|
584 |
'newlines',
|
|
|
585 |
'overflowdiv',
|
|
|
586 |
'blanktarget',
|
|
|
587 |
'allowid',
|
|
|
588 |
'noclean',
|
|
|
589 |
];
|
|
|
590 |
|
|
|
591 |
$invalidoptions = array_diff(array_keys($options), $validoptions);
|
|
|
592 |
if ($invalidoptions) {
|
|
|
593 |
debugging(sprintf(
|
|
|
594 |
'The following options are not valid: %s',
|
|
|
595 |
implode(', ', $invalidoptions),
|
|
|
596 |
), DEBUG_DEVELOPER);
|
|
|
597 |
foreach ($invalidoptions as $option) {
|
|
|
598 |
unset($options[$option]);
|
|
|
599 |
}
|
|
|
600 |
}
|
|
|
601 |
|
|
|
602 |
foreach ($options as $option => $value) {
|
|
|
603 |
$params[$option] = $value;
|
|
|
604 |
}
|
|
|
605 |
|
|
|
606 |
// The noclean option has been renamed to clean.
|
|
|
607 |
if (array_key_exists('noclean', $params)) {
|
|
|
608 |
$params['clean'] = !$params['noclean'];
|
|
|
609 |
unset($params['noclean']);
|
|
|
610 |
}
|
|
|
611 |
}
|
|
|
612 |
|
|
|
613 |
if ($format !== null) {
|
|
|
614 |
$params['format'] = $format;
|
|
|
615 |
}
|
|
|
616 |
|
|
|
617 |
return \core\di::get(\core\formatting::class)->format_text(...$params);
|
|
|
618 |
}
|
|
|
619 |
|
|
|
620 |
/**
|
|
|
621 |
* Resets some data related to filters, called during upgrade or when general filter settings change.
|
|
|
622 |
*
|
|
|
623 |
* @param bool $phpunitreset true means called from our PHPUnit integration test reset
|
|
|
624 |
* @return void
|
|
|
625 |
*/
|
|
|
626 |
function reset_text_filters_cache($phpunitreset = false) {
|
|
|
627 |
global $CFG, $DB;
|
|
|
628 |
|
|
|
629 |
if ($phpunitreset) {
|
|
|
630 |
// HTMLPurifier does not change, DB is already reset to defaults,
|
|
|
631 |
// nothing to do here, the dataroot was cleared too.
|
|
|
632 |
return;
|
|
|
633 |
}
|
|
|
634 |
|
|
|
635 |
// The purge_all_caches() deals with cachedir and localcachedir purging,
|
|
|
636 |
// the individual filter caches are invalidated as necessary elsewhere.
|
|
|
637 |
|
|
|
638 |
// Update $CFG->filterall cache flag.
|
|
|
639 |
if (empty($CFG->stringfilters)) {
|
|
|
640 |
set_config('filterall', 0);
|
|
|
641 |
return;
|
|
|
642 |
}
|
|
|
643 |
$installedfilters = core_component::get_plugin_list('filter');
|
|
|
644 |
$filters = explode(',', $CFG->stringfilters);
|
|
|
645 |
foreach ($filters as $filter) {
|
|
|
646 |
if (isset($installedfilters[$filter])) {
|
|
|
647 |
set_config('filterall', 1);
|
|
|
648 |
return;
|
|
|
649 |
}
|
|
|
650 |
}
|
|
|
651 |
set_config('filterall', 0);
|
|
|
652 |
}
|
|
|
653 |
|
|
|
654 |
/**
|
|
|
655 |
* Given a simple string, this function returns the string
|
|
|
656 |
* processed by enabled string filters if $CFG->filterall is enabled
|
|
|
657 |
*
|
|
|
658 |
* This function should be used to print short strings (non html) that
|
|
|
659 |
* need filter processing e.g. activity titles, post subjects,
|
|
|
660 |
* glossary concepts.
|
|
|
661 |
*
|
|
|
662 |
* @staticvar bool $strcache
|
|
|
663 |
* @param string $string The string to be filtered. Should be plain text, expect
|
|
|
664 |
* possibly for multilang tags.
|
|
|
665 |
* @param ?bool $striplinks To strip any link in the result text. Moodle 1.8 default changed from false to true! MDL-8713
|
|
|
666 |
* @param array $options options array/object or courseid
|
|
|
667 |
* @return string
|
|
|
668 |
*/
|
|
|
669 |
function format_string($string, $striplinks = true, $options = null) {
|
|
|
670 |
global $CFG;
|
|
|
671 |
|
|
|
672 |
// Manually include the formatting class for now until after the release after 4.5 LTS.
|
|
|
673 |
require_once("{$CFG->libdir}/classes/formatting.php");
|
|
|
674 |
|
|
|
675 |
$params = [
|
|
|
676 |
'string' => $string,
|
|
|
677 |
'striplinks' => (bool) $striplinks,
|
|
|
678 |
];
|
|
|
679 |
|
|
|
680 |
// This method only expects either:
|
|
|
681 |
// - an array of options;
|
|
|
682 |
// - a stdClass of options to be cast to an array; or
|
|
|
683 |
// - an integer courseid.
|
|
|
684 |
if ($options instanceof \core\context) {
|
|
|
685 |
// A common mistake has been to call this function with a context object.
|
|
|
686 |
// This has never been expected, or nor supported.
|
|
|
687 |
debugging(
|
|
|
688 |
'The options argument should not be a context object directly. ' .
|
|
|
689 |
' Please pass an array with a context key instead.',
|
|
|
690 |
DEBUG_DEVELOPER,
|
|
|
691 |
);
|
|
|
692 |
$params['context'] = $options;
|
|
|
693 |
$options = [];
|
|
|
694 |
} else if (is_numeric($options)) {
|
|
|
695 |
// Legacy courseid usage.
|
|
|
696 |
$params['context'] = \core\context\course::instance($options);
|
|
|
697 |
$options = [];
|
|
|
698 |
} else if (is_array($options) || is_a($options, \stdClass::class)) {
|
|
|
699 |
$options = (array) $options;
|
|
|
700 |
if (isset($options['context'])) {
|
|
|
701 |
if (is_numeric($options['context'])) {
|
|
|
702 |
// A contextid was passed usage.
|
|
|
703 |
$params['context'] = \core\context::instance_by_id($options['context']);
|
|
|
704 |
} else if ($options['context'] instanceof \core\context) {
|
|
|
705 |
$params['context'] = $options['context'];
|
|
|
706 |
} else {
|
|
|
707 |
debugging(
|
|
|
708 |
'An invalid value for context was provided.',
|
|
|
709 |
DEBUG_DEVELOPER,
|
|
|
710 |
);
|
|
|
711 |
}
|
|
|
712 |
}
|
|
|
713 |
} else if ($options !== null) {
|
|
|
714 |
// Something else was passed, so we'll just use an empty array.
|
|
|
715 |
debugging(sprintf(
|
|
|
716 |
'The options argument should be an Array, or stdclass. %s passed.',
|
|
|
717 |
gettype($options),
|
|
|
718 |
), DEBUG_DEVELOPER);
|
|
|
719 |
|
|
|
720 |
// Attempt to cast to array since we always used to, but throw in some debugging.
|
|
|
721 |
$options = array_filter(
|
|
|
722 |
(array) $options,
|
|
|
723 |
fn ($key) => !is_numeric($key),
|
|
|
724 |
ARRAY_FILTER_USE_KEY,
|
|
|
725 |
);
|
|
|
726 |
}
|
|
|
727 |
|
|
|
728 |
if (isset($options['filter'])) {
|
|
|
729 |
$params['filter'] = (bool) $options['filter'];
|
|
|
730 |
} else {
|
|
|
731 |
$params['filter'] = true;
|
|
|
732 |
}
|
|
|
733 |
|
|
|
734 |
if (isset($options['escape'])) {
|
|
|
735 |
$params['escape'] = (bool) $options['escape'];
|
|
|
736 |
} else {
|
|
|
737 |
$params['escape'] = true;
|
|
|
738 |
}
|
|
|
739 |
|
|
|
740 |
$validoptions = [
|
|
|
741 |
'string',
|
|
|
742 |
'striplinks',
|
|
|
743 |
'context',
|
|
|
744 |
'filter',
|
|
|
745 |
'escape',
|
|
|
746 |
];
|
|
|
747 |
|
|
|
748 |
if ($options) {
|
|
|
749 |
$invalidoptions = array_diff(array_keys($options), $validoptions);
|
|
|
750 |
if ($invalidoptions) {
|
|
|
751 |
debugging(sprintf(
|
|
|
752 |
'The following options are not valid: %s',
|
|
|
753 |
implode(', ', $invalidoptions),
|
|
|
754 |
), DEBUG_DEVELOPER);
|
|
|
755 |
}
|
|
|
756 |
}
|
|
|
757 |
|
|
|
758 |
return \core\di::get(\core\formatting::class)->format_string(
|
|
|
759 |
...$params,
|
|
|
760 |
);
|
|
|
761 |
}
|
|
|
762 |
|
|
|
763 |
/**
|
|
|
764 |
* Given a string, performs a negative lookahead looking for any ampersand character
|
|
|
765 |
* that is not followed by a proper HTML entity. If any is found, it is replaced
|
|
|
766 |
* by &. The string is then returned.
|
|
|
767 |
*
|
|
|
768 |
* @param string $string
|
|
|
769 |
* @return string
|
|
|
770 |
*/
|
|
|
771 |
function replace_ampersands_not_followed_by_entity($string) {
|
|
|
772 |
return preg_replace("/\&(?![a-zA-Z0-9#]{1,8};)/", "&", $string ?? '');
|
|
|
773 |
}
|
|
|
774 |
|
|
|
775 |
/**
|
|
|
776 |
* Given a string, replaces all <a>.*</a> by .* and returns the string.
|
|
|
777 |
*
|
|
|
778 |
* @param string $string
|
|
|
779 |
* @return string
|
|
|
780 |
*/
|
|
|
781 |
function strip_links($string) {
|
|
|
782 |
return preg_replace('/(<a\s[^>]+?>)(.+?)(<\/a>)/is', '$2', $string);
|
|
|
783 |
}
|
|
|
784 |
|
|
|
785 |
/**
|
|
|
786 |
* This expression turns links into something nice in a text format. (Russell Jungwirth)
|
|
|
787 |
*
|
|
|
788 |
* @param string $string
|
|
|
789 |
* @return string
|
|
|
790 |
*/
|
|
|
791 |
function wikify_links($string) {
|
|
|
792 |
return preg_replace('~(<a [^<]*href=["|\']?([^ "\']*)["|\']?[^>]*>([^<]*)</a>)~i', '$3 [ $2 ]', $string);
|
|
|
793 |
}
|
|
|
794 |
|
|
|
795 |
/**
|
|
|
796 |
* Given text in a variety of format codings, this function returns the text as plain text suitable for plain email.
|
|
|
797 |
*
|
|
|
798 |
* @param string $text The text to be formatted. This is raw text originally from user input.
|
|
|
799 |
* @param int $format Identifier of the text format to be used
|
|
|
800 |
* [FORMAT_MOODLE, FORMAT_HTML, FORMAT_PLAIN, FORMAT_WIKI, FORMAT_MARKDOWN]
|
|
|
801 |
* @return string
|
|
|
802 |
*/
|
|
|
803 |
function format_text_email($text, $format) {
|
|
|
804 |
|
|
|
805 |
switch ($format) {
|
|
|
806 |
|
|
|
807 |
case FORMAT_PLAIN:
|
|
|
808 |
return $text;
|
|
|
809 |
break;
|
|
|
810 |
|
|
|
811 |
case FORMAT_WIKI:
|
|
|
812 |
// There should not be any of these any more!
|
|
|
813 |
$text = wikify_links($text);
|
|
|
814 |
return core_text::entities_to_utf8(strip_tags($text), true);
|
|
|
815 |
break;
|
|
|
816 |
|
|
|
817 |
case FORMAT_HTML:
|
|
|
818 |
return html_to_text($text);
|
|
|
819 |
break;
|
|
|
820 |
|
|
|
821 |
case FORMAT_MOODLE:
|
|
|
822 |
case FORMAT_MARKDOWN:
|
|
|
823 |
default:
|
|
|
824 |
$text = wikify_links($text);
|
|
|
825 |
return core_text::entities_to_utf8(strip_tags($text), true);
|
|
|
826 |
break;
|
|
|
827 |
}
|
|
|
828 |
}
|
|
|
829 |
|
|
|
830 |
/**
|
|
|
831 |
* Formats activity intro text
|
|
|
832 |
*
|
|
|
833 |
* @param string $module name of module
|
|
|
834 |
* @param object $activity instance of activity
|
|
|
835 |
* @param int $cmid course module id
|
|
|
836 |
* @param bool $filter filter resulting html text
|
|
|
837 |
* @return string
|
|
|
838 |
*/
|
|
|
839 |
function format_module_intro($module, $activity, $cmid, $filter=true) {
|
|
|
840 |
global $CFG;
|
|
|
841 |
require_once("$CFG->libdir/filelib.php");
|
|
|
842 |
$context = context_module::instance($cmid);
|
|
|
843 |
$options = array('noclean' => true, 'para' => false, 'filter' => $filter, 'context' => $context, 'overflowdiv' => true);
|
|
|
844 |
$intro = file_rewrite_pluginfile_urls($activity->intro, 'pluginfile.php', $context->id, 'mod_'.$module, 'intro', null);
|
|
|
845 |
return trim(format_text($intro, $activity->introformat, $options, null));
|
|
|
846 |
}
|
|
|
847 |
|
|
|
848 |
/**
|
|
|
849 |
* Removes the usage of Moodle files from a text.
|
|
|
850 |
*
|
|
|
851 |
* In some rare cases we need to re-use a text that already has embedded links
|
|
|
852 |
* to some files hosted within Moodle. But the new area in which we will push
|
|
|
853 |
* this content does not support files... therefore we need to remove those files.
|
|
|
854 |
*
|
|
|
855 |
* @param string $source The text
|
|
|
856 |
* @return string The stripped text
|
|
|
857 |
*/
|
|
|
858 |
function strip_pluginfile_content($source) {
|
|
|
859 |
$baseurl = '@@PLUGINFILE@@';
|
|
|
860 |
// Looking for something like < .* "@@pluginfile@@.*" .* >
|
|
|
861 |
$pattern = '$<[^<>]+["\']' . $baseurl . '[^"\']*["\'][^<>]*>$';
|
|
|
862 |
$stripped = preg_replace($pattern, '', $source);
|
|
|
863 |
// Use purify html to rebalence potentially mismatched tags and generally cleanup.
|
|
|
864 |
return purify_html($stripped);
|
|
|
865 |
}
|
|
|
866 |
|
|
|
867 |
/**
|
|
|
868 |
* Legacy function, used for cleaning of old forum and glossary text only.
|
|
|
869 |
*
|
|
|
870 |
* @param string $text text that may contain legacy TRUSTTEXT marker
|
|
|
871 |
* @return string text without legacy TRUSTTEXT marker
|
|
|
872 |
*/
|
|
|
873 |
function trusttext_strip($text) {
|
|
|
874 |
if (!is_string($text)) {
|
|
|
875 |
// This avoids the potential for an endless loop below.
|
|
|
876 |
throw new coding_exception('trusttext_strip parameter must be a string');
|
|
|
877 |
}
|
|
|
878 |
while (true) { // Removing nested TRUSTTEXT.
|
|
|
879 |
$orig = $text;
|
|
|
880 |
$text = str_replace('#####TRUSTTEXT#####', '', $text);
|
|
|
881 |
if (strcmp($orig, $text) === 0) {
|
|
|
882 |
return $text;
|
|
|
883 |
}
|
|
|
884 |
}
|
|
|
885 |
}
|
|
|
886 |
|
|
|
887 |
/**
|
|
|
888 |
* Must be called before editing of all texts with trust flag. Removes all XSS nasties from texts stored in database if needed.
|
|
|
889 |
*
|
|
|
890 |
* @param stdClass $object data object with xxx, xxxformat and xxxtrust fields
|
|
|
891 |
* @param string $field name of text field
|
|
|
892 |
* @param context $context active context
|
|
|
893 |
* @return stdClass updated $object
|
|
|
894 |
*/
|
|
|
895 |
function trusttext_pre_edit($object, $field, $context) {
|
|
|
896 |
$trustfield = $field.'trust';
|
|
|
897 |
$formatfield = $field.'format';
|
|
|
898 |
|
|
|
899 |
if ($object->$formatfield == FORMAT_MARKDOWN) {
|
|
|
900 |
// We do not have a way to sanitise Markdown texts,
|
|
|
901 |
// luckily editors for this format should not have XSS problems.
|
|
|
902 |
return $object;
|
|
|
903 |
}
|
|
|
904 |
|
|
|
905 |
if (!$object->$trustfield or !trusttext_trusted($context)) {
|
|
|
906 |
$object->$field = clean_text($object->$field, $object->$formatfield);
|
|
|
907 |
}
|
|
|
908 |
|
|
|
909 |
return $object;
|
|
|
910 |
}
|
|
|
911 |
|
|
|
912 |
/**
|
|
|
913 |
* Is current user trusted to enter no dangerous XSS in this context?
|
|
|
914 |
*
|
|
|
915 |
* Please note the user must be in fact trusted everywhere on this server!!
|
|
|
916 |
*
|
|
|
917 |
* @param context $context
|
|
|
918 |
* @return bool true if user trusted
|
|
|
919 |
*/
|
|
|
920 |
function trusttext_trusted($context) {
|
|
|
921 |
return (trusttext_active() and has_capability('moodle/site:trustcontent', $context));
|
|
|
922 |
}
|
|
|
923 |
|
|
|
924 |
/**
|
|
|
925 |
* Is trusttext feature active?
|
|
|
926 |
*
|
|
|
927 |
* @return bool
|
|
|
928 |
*/
|
|
|
929 |
function trusttext_active() {
|
|
|
930 |
global $CFG;
|
|
|
931 |
|
|
|
932 |
return !empty($CFG->enabletrusttext);
|
|
|
933 |
}
|
|
|
934 |
|
|
|
935 |
/**
|
|
|
936 |
* Cleans raw text removing nasties.
|
|
|
937 |
*
|
|
|
938 |
* Given raw text (eg typed in by a user) this function cleans it up and removes any nasty tags that could mess up
|
|
|
939 |
* Moodle pages through XSS attacks.
|
|
|
940 |
*
|
|
|
941 |
* The result must be used as a HTML text fragment, this function can not cleanup random
|
|
|
942 |
* parts of html tags such as url or src attributes.
|
|
|
943 |
*
|
|
|
944 |
* NOTE: the format parameter was deprecated because we can safely clean only HTML.
|
|
|
945 |
*
|
|
|
946 |
* @param string $text The text to be cleaned
|
|
|
947 |
* @param int|string $format deprecated parameter, should always contain FORMAT_HTML or FORMAT_MOODLE
|
|
|
948 |
* @param array $options Array of options; currently only option supported is 'allowid' (if true,
|
|
|
949 |
* does not remove id attributes when cleaning)
|
|
|
950 |
* @return string The cleaned up text
|
|
|
951 |
*/
|
|
|
952 |
function clean_text($text, $format = FORMAT_HTML, $options = array()) {
|
|
|
953 |
$text = (string)$text;
|
|
|
954 |
|
|
|
955 |
if ($format != FORMAT_HTML and $format != FORMAT_HTML) {
|
|
|
956 |
// TODO: we need to standardise cleanup of text when loading it into editor first.
|
|
|
957 |
// debugging('clean_text() is designed to work only with html');.
|
|
|
958 |
}
|
|
|
959 |
|
|
|
960 |
if ($format == FORMAT_PLAIN) {
|
|
|
961 |
return $text;
|
|
|
962 |
}
|
|
|
963 |
|
|
|
964 |
if (is_purify_html_necessary($text)) {
|
|
|
965 |
$text = purify_html($text, $options);
|
|
|
966 |
}
|
|
|
967 |
|
|
|
968 |
// Originally we tried to neutralise some script events here, it was a wrong approach because
|
|
|
969 |
// it was trivial to work around that (for example using style based XSS exploits).
|
|
|
970 |
// We must not give false sense of security here - all developers MUST understand how to use
|
|
|
971 |
// rawurlencode(), htmlentities(), htmlspecialchars(), p(), s(), moodle_url, html_writer and friends!!!
|
|
|
972 |
|
|
|
973 |
return $text;
|
|
|
974 |
}
|
|
|
975 |
|
|
|
976 |
/**
|
|
|
977 |
* Is it necessary to use HTMLPurifier?
|
|
|
978 |
*
|
|
|
979 |
* @private
|
|
|
980 |
* @param string $text
|
|
|
981 |
* @return bool false means html is safe and valid, true means use HTMLPurifier
|
|
|
982 |
*/
|
|
|
983 |
function is_purify_html_necessary($text) {
|
|
|
984 |
if ($text === '') {
|
|
|
985 |
return false;
|
|
|
986 |
}
|
|
|
987 |
|
|
|
988 |
if ($text === (string)((int)$text)) {
|
|
|
989 |
return false;
|
|
|
990 |
}
|
|
|
991 |
|
|
|
992 |
if (strpos($text, '&') !== false or preg_match('|<[^pesb/]|', $text)) {
|
|
|
993 |
// We need to normalise entities or other tags except p, em, strong and br present.
|
|
|
994 |
return true;
|
|
|
995 |
}
|
|
|
996 |
|
|
|
997 |
$altered = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8', true);
|
|
|
998 |
if ($altered === $text) {
|
|
|
999 |
// No < > or other special chars means this must be safe.
|
|
|
1000 |
return false;
|
|
|
1001 |
}
|
|
|
1002 |
|
|
|
1003 |
// Let's try to convert back some safe html tags.
|
|
|
1004 |
$altered = preg_replace('|<p>(.*?)</p>|m', '<p>$1</p>', $altered);
|
|
|
1005 |
if ($altered === $text) {
|
|
|
1006 |
return false;
|
|
|
1007 |
}
|
|
|
1008 |
$altered = preg_replace('|<em>([^<>]+?)</em>|m', '<em>$1</em>', $altered);
|
|
|
1009 |
if ($altered === $text) {
|
|
|
1010 |
return false;
|
|
|
1011 |
}
|
|
|
1012 |
$altered = preg_replace('|<strong>([^<>]+?)</strong>|m', '<strong>$1</strong>', $altered);
|
|
|
1013 |
if ($altered === $text) {
|
|
|
1014 |
return false;
|
|
|
1015 |
}
|
|
|
1016 |
$altered = str_replace('<br />', '<br />', $altered);
|
|
|
1017 |
if ($altered === $text) {
|
|
|
1018 |
return false;
|
|
|
1019 |
}
|
|
|
1020 |
|
|
|
1021 |
return true;
|
|
|
1022 |
}
|
|
|
1023 |
|
|
|
1024 |
/**
|
|
|
1025 |
* KSES replacement cleaning function - uses HTML Purifier.
|
|
|
1026 |
*
|
|
|
1027 |
* @param string $text The (X)HTML string to purify
|
|
|
1028 |
* @param array $options Array of options; currently only option supported is 'allowid' (if set,
|
|
|
1029 |
* does not remove id attributes when cleaning)
|
|
|
1030 |
* @return string
|
|
|
1031 |
*/
|
|
|
1032 |
function purify_html($text, $options = array()) {
|
|
|
1033 |
global $CFG;
|
|
|
1034 |
|
|
|
1035 |
$text = (string)$text;
|
|
|
1036 |
|
|
|
1037 |
static $purifiers = array();
|
|
|
1038 |
static $caches = array();
|
|
|
1039 |
|
|
|
1040 |
// Purifier code can change only during major version upgrade.
|
|
|
1041 |
$version = empty($CFG->version) ? 0 : $CFG->version;
|
|
|
1042 |
$cachedir = "$CFG->localcachedir/htmlpurifier/$version";
|
|
|
1043 |
if (!file_exists($cachedir)) {
|
|
|
1044 |
// Purging of caches may remove the cache dir at any time,
|
|
|
1045 |
// luckily file_exists() results should be cached for all existing directories.
|
|
|
1046 |
$purifiers = array();
|
|
|
1047 |
$caches = array();
|
|
|
1048 |
gc_collect_cycles();
|
|
|
1049 |
|
|
|
1050 |
make_localcache_directory('htmlpurifier', false);
|
|
|
1051 |
check_dir_exists($cachedir);
|
|
|
1052 |
}
|
|
|
1053 |
|
|
|
1054 |
$allowid = empty($options['allowid']) ? 0 : 1;
|
|
|
1055 |
$allowobjectembed = empty($CFG->allowobjectembed) ? 0 : 1;
|
|
|
1056 |
|
|
|
1057 |
$type = 'type_'.$allowid.'_'.$allowobjectembed;
|
|
|
1058 |
|
|
|
1059 |
if (!array_key_exists($type, $caches)) {
|
|
|
1060 |
$caches[$type] = cache::make('core', 'htmlpurifier', array('type' => $type));
|
|
|
1061 |
}
|
|
|
1062 |
$cache = $caches[$type];
|
|
|
1063 |
|
|
|
1064 |
// Add revision number and all options to the text key so that it is compatible with local cluster node caches.
|
|
|
1065 |
$key = "|$version|$allowobjectembed|$allowid|$text";
|
|
|
1066 |
$filteredtext = $cache->get($key);
|
|
|
1067 |
|
|
|
1068 |
if ($filteredtext === true) {
|
|
|
1069 |
// The filtering did not change the text last time, no need to filter anything again.
|
|
|
1070 |
return $text;
|
|
|
1071 |
} else if ($filteredtext !== false) {
|
|
|
1072 |
return $filteredtext;
|
|
|
1073 |
}
|
|
|
1074 |
|
|
|
1075 |
if (empty($purifiers[$type])) {
|
|
|
1076 |
require_once $CFG->libdir.'/htmlpurifier/HTMLPurifier.safe-includes.php';
|
|
|
1077 |
require_once $CFG->libdir.'/htmlpurifier/locallib.php';
|
|
|
1078 |
$config = HTMLPurifier_Config::createDefault();
|
|
|
1079 |
|
|
|
1080 |
$config->set('HTML.DefinitionID', 'moodlehtml');
|
|
|
1081 |
$config->set('HTML.DefinitionRev', 7);
|
| 1441 |
ariadna |
1082 |
$config->set('CSS.Proprietary', true);
|
| 1 |
efrain |
1083 |
$config->set('Cache.SerializerPath', $cachedir);
|
|
|
1084 |
$config->set('Cache.SerializerPermissions', $CFG->directorypermissions);
|
|
|
1085 |
$config->set('Core.NormalizeNewlines', false);
|
|
|
1086 |
$config->set('Core.ConvertDocumentToFragment', true);
|
|
|
1087 |
$config->set('Core.Encoding', 'UTF-8');
|
|
|
1088 |
$config->set('HTML.Doctype', 'XHTML 1.0 Transitional');
|
|
|
1089 |
$config->set('URI.AllowedSchemes', array(
|
|
|
1090 |
'http' => true,
|
|
|
1091 |
'https' => true,
|
|
|
1092 |
'ftp' => true,
|
|
|
1093 |
'irc' => true,
|
|
|
1094 |
'nntp' => true,
|
|
|
1095 |
'news' => true,
|
|
|
1096 |
'rtsp' => true,
|
|
|
1097 |
'rtmp' => true,
|
|
|
1098 |
'teamspeak' => true,
|
|
|
1099 |
'gopher' => true,
|
|
|
1100 |
'mms' => true,
|
|
|
1101 |
'mailto' => true
|
|
|
1102 |
));
|
|
|
1103 |
$config->set('Attr.AllowedFrameTargets', array('_blank'));
|
|
|
1104 |
|
|
|
1105 |
if ($allowobjectembed) {
|
|
|
1106 |
$config->set('HTML.SafeObject', true);
|
|
|
1107 |
$config->set('Output.FlashCompat', true);
|
|
|
1108 |
$config->set('HTML.SafeEmbed', true);
|
|
|
1109 |
}
|
|
|
1110 |
|
|
|
1111 |
if ($allowid) {
|
|
|
1112 |
$config->set('Attr.EnableID', true);
|
|
|
1113 |
}
|
|
|
1114 |
|
|
|
1115 |
if ($def = $config->maybeGetRawHTMLDefinition()) {
|
|
|
1116 |
$def->addElement('nolink', 'Inline', 'Flow', array()); // Skip our filters inside.
|
|
|
1117 |
$def->addElement('tex', 'Inline', 'Inline', array()); // Tex syntax, equivalent to $$xx$$.
|
|
|
1118 |
$def->addElement('algebra', 'Inline', 'Inline', array()); // Algebra syntax, equivalent to @@xx@@.
|
|
|
1119 |
$def->addElement('lang', 'Block', 'Flow', array(), array('lang'=>'CDATA')); // Original multilang style - only our hacked lang attribute.
|
|
|
1120 |
$def->addAttribute('span', 'xxxlang', 'CDATA'); // Current very problematic multilang.
|
|
|
1121 |
// Enable the bidirectional isolate element and its span equivalent.
|
|
|
1122 |
$def->addElement('bdi', 'Inline', 'Flow', 'Common');
|
|
|
1123 |
$def->addAttribute('span', 'dir', 'Enum#ltr,rtl,auto');
|
|
|
1124 |
|
|
|
1125 |
// Media elements.
|
|
|
1126 |
// https://html.spec.whatwg.org/#the-video-element
|
|
|
1127 |
$def->addElement('video', 'Inline', 'Optional: #PCDATA | Flow | source | track', 'Common', [
|
|
|
1128 |
'src' => 'URI',
|
|
|
1129 |
'crossorigin' => 'Enum#anonymous,use-credentials',
|
|
|
1130 |
'poster' => 'URI',
|
|
|
1131 |
'preload' => 'Enum#auto,metadata,none',
|
|
|
1132 |
'autoplay' => 'Bool',
|
|
|
1133 |
'playsinline' => 'Bool',
|
|
|
1134 |
'loop' => 'Bool',
|
|
|
1135 |
'muted' => 'Bool',
|
|
|
1136 |
'controls' => 'Bool',
|
|
|
1137 |
'width' => 'Length',
|
|
|
1138 |
'height' => 'Length',
|
|
|
1139 |
]);
|
|
|
1140 |
// https://html.spec.whatwg.org/#the-audio-element
|
|
|
1141 |
$def->addElement('audio', 'Inline', 'Optional: #PCDATA | Flow | source | track', 'Common', [
|
|
|
1142 |
'src' => 'URI',
|
|
|
1143 |
'crossorigin' => 'Enum#anonymous,use-credentials',
|
|
|
1144 |
'preload' => 'Enum#auto,metadata,none',
|
|
|
1145 |
'autoplay' => 'Bool',
|
|
|
1146 |
'loop' => 'Bool',
|
|
|
1147 |
'muted' => 'Bool',
|
|
|
1148 |
'controls' => 'Bool'
|
|
|
1149 |
]);
|
|
|
1150 |
// https://html.spec.whatwg.org/#the-source-element
|
|
|
1151 |
$def->addElement('source', false, 'Empty', null, [
|
|
|
1152 |
'src' => 'URI',
|
|
|
1153 |
'type' => 'Text'
|
|
|
1154 |
]);
|
|
|
1155 |
// https://html.spec.whatwg.org/#the-track-element
|
|
|
1156 |
$def->addElement('track', false, 'Empty', null, [
|
|
|
1157 |
'src' => 'URI',
|
|
|
1158 |
'kind' => 'Enum#subtitles,captions,descriptions,chapters,metadata',
|
|
|
1159 |
'srclang' => 'Text',
|
|
|
1160 |
'label' => 'Text',
|
|
|
1161 |
'default' => 'Bool',
|
|
|
1162 |
]);
|
|
|
1163 |
|
|
|
1164 |
// Use the built-in Ruby module to add annotation support.
|
|
|
1165 |
$def->manager->addModule(new HTMLPurifier_HTMLModule_Ruby());
|
|
|
1166 |
}
|
|
|
1167 |
|
|
|
1168 |
$purifier = new HTMLPurifier($config);
|
|
|
1169 |
$purifiers[$type] = $purifier;
|
|
|
1170 |
} else {
|
|
|
1171 |
$purifier = $purifiers[$type];
|
|
|
1172 |
}
|
|
|
1173 |
|
|
|
1174 |
$multilang = (strpos($text, 'class="multilang"') !== false);
|
|
|
1175 |
|
|
|
1176 |
$filteredtext = $text;
|
|
|
1177 |
if ($multilang) {
|
|
|
1178 |
$filteredtextregex = '/<span(\s+lang="([a-zA-Z0-9_-]+)"|\s+class="multilang"){2}\s*>/';
|
|
|
1179 |
$filteredtext = preg_replace($filteredtextregex, '<span xxxlang="${2}">', $filteredtext);
|
|
|
1180 |
}
|
|
|
1181 |
$filteredtext = (string)$purifier->purify($filteredtext);
|
|
|
1182 |
if ($multilang) {
|
|
|
1183 |
$filteredtext = preg_replace('/<span xxxlang="([a-zA-Z0-9_-]+)">/', '<span lang="${1}" class="multilang">', $filteredtext);
|
|
|
1184 |
}
|
|
|
1185 |
|
|
|
1186 |
if ($text === $filteredtext) {
|
|
|
1187 |
// No need to store the filtered text, next time we will just return unfiltered text
|
|
|
1188 |
// because it was not changed by purifying.
|
|
|
1189 |
$cache->set($key, true);
|
|
|
1190 |
} else {
|
|
|
1191 |
$cache->set($key, $filteredtext);
|
|
|
1192 |
}
|
|
|
1193 |
|
|
|
1194 |
return $filteredtext;
|
|
|
1195 |
}
|
|
|
1196 |
|
|
|
1197 |
/**
|
|
|
1198 |
* Given plain text, makes it into HTML as nicely as possible.
|
|
|
1199 |
*
|
|
|
1200 |
* May contain HTML tags already.
|
|
|
1201 |
*
|
|
|
1202 |
* Do not abuse this function. It is intended as lower level formatting feature used
|
|
|
1203 |
* by {@link format_text()} to convert FORMAT_MOODLE to HTML. You are supposed
|
|
|
1204 |
* to call format_text() in most of cases.
|
|
|
1205 |
*
|
|
|
1206 |
* @param string $text The string to convert.
|
|
|
1207 |
* @param boolean $smileyignored Was used to determine if smiley characters should convert to smiley images, ignored now
|
|
|
1208 |
* @param boolean $para If true then the returned string will be wrapped in div tags
|
|
|
1209 |
* @param boolean $newlines If true then lines newline breaks will be converted to HTML newline breaks.
|
|
|
1210 |
* @return string
|
|
|
1211 |
*/
|
|
|
1212 |
function text_to_html($text, $smileyignored = null, $para = true, $newlines = true) {
|
|
|
1213 |
// Remove any whitespace that may be between HTML tags.
|
|
|
1214 |
$text = preg_replace("~>([[:space:]]+)<~i", "><", $text);
|
|
|
1215 |
|
|
|
1216 |
// Remove any returns that precede or follow HTML tags.
|
|
|
1217 |
$text = preg_replace("~([\n\r])<~i", " <", $text);
|
|
|
1218 |
$text = preg_replace("~>([\n\r])~i", "> ", $text);
|
|
|
1219 |
|
|
|
1220 |
// Make returns into HTML newlines.
|
|
|
1221 |
if ($newlines) {
|
|
|
1222 |
$text = nl2br($text);
|
|
|
1223 |
}
|
|
|
1224 |
|
|
|
1225 |
// Wrap the whole thing in a div if required.
|
|
|
1226 |
if ($para) {
|
|
|
1227 |
// In 1.9 this was changed from a p => div.
|
|
|
1228 |
return '<div class="text_to_html">'.$text.'</div>';
|
|
|
1229 |
} else {
|
|
|
1230 |
return $text;
|
|
|
1231 |
}
|
|
|
1232 |
}
|
|
|
1233 |
|
|
|
1234 |
/**
|
|
|
1235 |
* Given Markdown formatted text, make it into XHTML using external function
|
|
|
1236 |
*
|
|
|
1237 |
* @param string $text The markdown formatted text to be converted.
|
|
|
1238 |
* @return string Converted text
|
|
|
1239 |
*/
|
|
|
1240 |
function markdown_to_html($text) {
|
|
|
1241 |
if ($text === '' or $text === null) {
|
|
|
1242 |
return $text;
|
|
|
1243 |
}
|
|
|
1244 |
|
|
|
1245 |
return \Michelf\MarkdownExtra::defaultTransform($text);
|
|
|
1246 |
}
|
|
|
1247 |
|
|
|
1248 |
/**
|
|
|
1249 |
* Given HTML text, make it into plain text using external function
|
|
|
1250 |
*
|
|
|
1251 |
* @param string $html The text to be converted.
|
|
|
1252 |
* @param integer $width Width to wrap the text at. (optional, default 75 which
|
|
|
1253 |
* is a good value for email. 0 means do not limit line length.)
|
|
|
1254 |
* @param boolean $dolinks By default, any links in the HTML are collected, and
|
|
|
1255 |
* printed as a list at the end of the HTML. If you don't want that, set this
|
|
|
1256 |
* argument to false.
|
|
|
1257 |
* @return string plain text equivalent of the HTML.
|
|
|
1258 |
*/
|
|
|
1259 |
function html_to_text($html, $width = 75, $dolinks = true) {
|
|
|
1260 |
global $CFG;
|
|
|
1261 |
|
|
|
1262 |
require_once($CFG->libdir .'/html2text/lib.php');
|
|
|
1263 |
|
|
|
1264 |
$options = array(
|
|
|
1265 |
'width' => $width,
|
|
|
1266 |
'do_links' => 'table',
|
|
|
1267 |
);
|
|
|
1268 |
|
|
|
1269 |
if (empty($dolinks)) {
|
|
|
1270 |
$options['do_links'] = 'none';
|
|
|
1271 |
}
|
|
|
1272 |
$h2t = new core_html2text($html, $options);
|
|
|
1273 |
$result = $h2t->getText();
|
|
|
1274 |
|
|
|
1275 |
return $result;
|
|
|
1276 |
}
|
|
|
1277 |
|
|
|
1278 |
/**
|
|
|
1279 |
* Converts texts or strings to plain text.
|
|
|
1280 |
*
|
|
|
1281 |
* - When used to convert user input introduced in an editor the text format needs to be passed in $contentformat like we usually
|
|
|
1282 |
* do in format_text.
|
|
|
1283 |
* - When this function is used for strings that are usually passed through format_string before displaying them
|
|
|
1284 |
* we need to set $contentformat to false. This will execute html_to_text as these strings can contain multilang tags if
|
|
|
1285 |
* multilang filter is applied to headings.
|
|
|
1286 |
*
|
|
|
1287 |
* @param string $content The text as entered by the user
|
|
|
1288 |
* @param int|false $contentformat False for strings or the text format: FORMAT_MOODLE/FORMAT_HTML/FORMAT_PLAIN/FORMAT_MARKDOWN
|
|
|
1289 |
* @return string Plain text.
|
|
|
1290 |
*/
|
|
|
1291 |
function content_to_text($content, $contentformat) {
|
|
|
1292 |
|
|
|
1293 |
switch ($contentformat) {
|
|
|
1294 |
case FORMAT_PLAIN:
|
|
|
1295 |
// Nothing here.
|
|
|
1296 |
break;
|
|
|
1297 |
case FORMAT_MARKDOWN:
|
|
|
1298 |
$content = markdown_to_html($content);
|
|
|
1299 |
$content = html_to_text($content, 75, false);
|
|
|
1300 |
break;
|
|
|
1301 |
default:
|
|
|
1302 |
// FORMAT_HTML, FORMAT_MOODLE and $contentformat = false, the later one are strings usually formatted through
|
|
|
1303 |
// format_string, we need to convert them from html because they can contain HTML (multilang filter).
|
|
|
1304 |
$content = html_to_text($content, 75, false);
|
|
|
1305 |
}
|
|
|
1306 |
|
|
|
1307 |
return trim($content, "\r\n ");
|
|
|
1308 |
}
|
|
|
1309 |
|
|
|
1310 |
/**
|
|
|
1311 |
* Factory method for extracting draft file links from arbitrary text using regular expressions. Only text
|
|
|
1312 |
* is required; other file fields may be passed to filter.
|
|
|
1313 |
*
|
|
|
1314 |
* @param string $text Some html content.
|
|
|
1315 |
* @param bool $forcehttps force https urls.
|
|
|
1316 |
* @param int $contextid This parameter and the next three identify the file area to save to.
|
|
|
1317 |
* @param string $component The component name.
|
|
|
1318 |
* @param string $filearea The filearea.
|
|
|
1319 |
* @param int $itemid The item id for the filearea.
|
|
|
1320 |
* @param string $filename The specific filename of the file.
|
|
|
1321 |
* @return array
|
|
|
1322 |
*/
|
|
|
1323 |
function extract_draft_file_urls_from_text($text, $forcehttps = false, $contextid = null, $component = null,
|
|
|
1324 |
$filearea = null, $itemid = null, $filename = null) {
|
|
|
1325 |
global $CFG;
|
|
|
1326 |
|
|
|
1327 |
$wwwroot = $CFG->wwwroot;
|
|
|
1328 |
if ($forcehttps) {
|
|
|
1329 |
$wwwroot = str_replace('http://', 'https://', $wwwroot);
|
|
|
1330 |
}
|
|
|
1331 |
$urlstring = '/' . preg_quote($wwwroot, '/');
|
|
|
1332 |
|
|
|
1333 |
$urlbase = preg_quote('draftfile.php');
|
|
|
1334 |
$urlstring .= "\/(?<urlbase>{$urlbase})";
|
|
|
1335 |
|
|
|
1336 |
if (is_null($contextid)) {
|
|
|
1337 |
$contextid = '[0-9]+';
|
|
|
1338 |
}
|
|
|
1339 |
$urlstring .= "\/(?<contextid>{$contextid})";
|
|
|
1340 |
|
|
|
1341 |
if (is_null($component)) {
|
|
|
1342 |
$component = '[a-z_]+';
|
|
|
1343 |
}
|
|
|
1344 |
$urlstring .= "\/(?<component>{$component})";
|
|
|
1345 |
|
|
|
1346 |
if (is_null($filearea)) {
|
|
|
1347 |
$filearea = '[a-z_]+';
|
|
|
1348 |
}
|
|
|
1349 |
$urlstring .= "\/(?<filearea>{$filearea})";
|
|
|
1350 |
|
|
|
1351 |
if (is_null($itemid)) {
|
|
|
1352 |
$itemid = '[0-9]+';
|
|
|
1353 |
}
|
|
|
1354 |
$urlstring .= "\/(?<itemid>{$itemid})";
|
|
|
1355 |
|
|
|
1356 |
// Filename matching magic based on file_rewrite_urls_to_pluginfile().
|
|
|
1357 |
if (is_null($filename)) {
|
|
|
1358 |
$filename = '[^\'\",&<>|`\s:\\\\]+';
|
|
|
1359 |
}
|
|
|
1360 |
$urlstring .= "\/(?<filename>{$filename})/";
|
|
|
1361 |
|
|
|
1362 |
// Regular expression which matches URLs and returns their components.
|
|
|
1363 |
preg_match_all($urlstring, $text, $urls, PREG_SET_ORDER);
|
|
|
1364 |
return $urls;
|
|
|
1365 |
}
|
|
|
1366 |
|
|
|
1367 |
/**
|
|
|
1368 |
* This function will highlight search words in a given string
|
|
|
1369 |
*
|
|
|
1370 |
* It cares about HTML and will not ruin links. It's best to use
|
|
|
1371 |
* this function after performing any conversions to HTML.
|
|
|
1372 |
*
|
|
|
1373 |
* @param string $needle The search string. Syntax like "word1 +word2 -word3" is dealt with correctly.
|
|
|
1374 |
* @param string $haystack The string (HTML) within which to highlight the search terms.
|
|
|
1375 |
* @param boolean $matchcase whether to do case-sensitive. Default case-insensitive.
|
|
|
1376 |
* @param string $prefix the string to put before each search term found.
|
|
|
1377 |
* @param string $suffix the string to put after each search term found.
|
|
|
1378 |
* @return string The highlighted HTML.
|
|
|
1379 |
*/
|
|
|
1380 |
function highlight($needle, $haystack, $matchcase = false,
|
|
|
1381 |
$prefix = '<span class="highlight">', $suffix = '</span>') {
|
|
|
1382 |
|
|
|
1383 |
// Quick bail-out in trivial cases.
|
|
|
1384 |
if (empty($needle) or empty($haystack)) {
|
|
|
1385 |
return $haystack;
|
|
|
1386 |
}
|
|
|
1387 |
|
|
|
1388 |
// Break up the search term into words, discard any -words and build a regexp.
|
|
|
1389 |
$words = preg_split('/ +/', trim($needle));
|
|
|
1390 |
foreach ($words as $index => $word) {
|
|
|
1391 |
if (strpos($word, '-') === 0) {
|
|
|
1392 |
unset($words[$index]);
|
|
|
1393 |
} else if (strpos($word, '+') === 0) {
|
|
|
1394 |
$words[$index] = '\b' . preg_quote(ltrim($word, '+'), '/') . '\b'; // Match only as a complete word.
|
|
|
1395 |
} else {
|
|
|
1396 |
$words[$index] = preg_quote($word, '/');
|
|
|
1397 |
}
|
|
|
1398 |
}
|
|
|
1399 |
$regexp = '/(' . implode('|', $words) . ')/u'; // Char u is to do UTF-8 matching.
|
|
|
1400 |
if (!$matchcase) {
|
|
|
1401 |
$regexp .= 'i';
|
|
|
1402 |
}
|
|
|
1403 |
|
|
|
1404 |
// Another chance to bail-out if $search was only -words.
|
|
|
1405 |
if (empty($words)) {
|
|
|
1406 |
return $haystack;
|
|
|
1407 |
}
|
|
|
1408 |
|
|
|
1409 |
// Split the string into HTML tags and real content.
|
|
|
1410 |
$chunks = preg_split('/((?:<[^>]*>)+)/', $haystack, -1, PREG_SPLIT_DELIM_CAPTURE);
|
|
|
1411 |
|
|
|
1412 |
// We have an array of alternating blocks of text, then HTML tags, then text, ...
|
|
|
1413 |
// Loop through replacing search terms in the text, and leaving the HTML unchanged.
|
|
|
1414 |
$ishtmlchunk = false;
|
|
|
1415 |
$result = '';
|
|
|
1416 |
foreach ($chunks as $chunk) {
|
|
|
1417 |
if ($ishtmlchunk) {
|
|
|
1418 |
$result .= $chunk;
|
|
|
1419 |
} else {
|
|
|
1420 |
$result .= preg_replace($regexp, $prefix . '$1' . $suffix, $chunk);
|
|
|
1421 |
}
|
|
|
1422 |
$ishtmlchunk = !$ishtmlchunk;
|
|
|
1423 |
}
|
|
|
1424 |
|
|
|
1425 |
return $result;
|
|
|
1426 |
}
|
|
|
1427 |
|
|
|
1428 |
/**
|
|
|
1429 |
* This function will highlight instances of $needle in $haystack
|
|
|
1430 |
*
|
|
|
1431 |
* It's faster that the above function {@link highlight()} and doesn't care about
|
|
|
1432 |
* HTML or anything.
|
|
|
1433 |
*
|
|
|
1434 |
* @param string $needle The string to search for
|
|
|
1435 |
* @param string $haystack The string to search for $needle in
|
|
|
1436 |
* @return string The highlighted HTML
|
|
|
1437 |
*/
|
|
|
1438 |
function highlightfast($needle, $haystack) {
|
|
|
1439 |
|
|
|
1440 |
if (empty($needle) or empty($haystack)) {
|
|
|
1441 |
return $haystack;
|
|
|
1442 |
}
|
|
|
1443 |
|
|
|
1444 |
$parts = explode(core_text::strtolower($needle), core_text::strtolower($haystack));
|
|
|
1445 |
|
|
|
1446 |
if (count($parts) === 1) {
|
|
|
1447 |
return $haystack;
|
|
|
1448 |
}
|
|
|
1449 |
|
|
|
1450 |
$pos = 0;
|
|
|
1451 |
|
|
|
1452 |
foreach ($parts as $key => $part) {
|
|
|
1453 |
$parts[$key] = substr($haystack, $pos, strlen($part));
|
|
|
1454 |
$pos += strlen($part);
|
|
|
1455 |
|
|
|
1456 |
$parts[$key] .= '<span class="highlight">'.substr($haystack, $pos, strlen($needle)).'</span>';
|
|
|
1457 |
$pos += strlen($needle);
|
|
|
1458 |
}
|
|
|
1459 |
|
|
|
1460 |
return str_replace('<span class="highlight"></span>', '', join('', $parts));
|
|
|
1461 |
}
|
|
|
1462 |
|
|
|
1463 |
/**
|
|
|
1464 |
* Converts a language code to hyphen-separated format in accordance to the
|
|
|
1465 |
* {@link https://datatracker.ietf.org/doc/html/rfc5646#section-2.1 BCP47 syntax}.
|
|
|
1466 |
*
|
|
|
1467 |
* For additional information, check out
|
|
|
1468 |
* {@link https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/lang MDN web docs - lang}.
|
|
|
1469 |
*
|
|
|
1470 |
* @param string $langcode The language code to convert.
|
|
|
1471 |
* @return string
|
|
|
1472 |
*/
|
|
|
1473 |
function get_html_lang_attribute_value(string $langcode): string {
|
|
|
1474 |
$langcode = clean_param($langcode, PARAM_LANG);
|
|
|
1475 |
if ($langcode === '') {
|
|
|
1476 |
return 'en';
|
|
|
1477 |
}
|
|
|
1478 |
|
|
|
1479 |
// Grab language ISO code from lang config. If it differs from English, then it's been specified and we can return it.
|
|
|
1480 |
$langiso = (string) (new lang_string('iso6391', 'core_langconfig', null, $langcode));
|
|
|
1481 |
if ($langiso !== 'en') {
|
|
|
1482 |
return $langiso;
|
|
|
1483 |
}
|
|
|
1484 |
|
|
|
1485 |
// Where we cannot determine the value from lang config, use the first two characters from the lang code.
|
|
|
1486 |
return substr($langcode, 0, 2);
|
|
|
1487 |
}
|
|
|
1488 |
|
|
|
1489 |
/**
|
|
|
1490 |
* Return a string containing 'lang', xml:lang and optionally 'dir' HTML attributes.
|
|
|
1491 |
*
|
|
|
1492 |
* Internationalisation, for print_header and backup/restorelib.
|
|
|
1493 |
*
|
|
|
1494 |
* @param bool $dir Default false
|
|
|
1495 |
* @return string Attributes
|
|
|
1496 |
*/
|
|
|
1497 |
function get_html_lang($dir = false) {
|
|
|
1498 |
global $CFG;
|
|
|
1499 |
|
|
|
1500 |
$currentlang = current_language();
|
|
|
1501 |
if (isset($CFG->lang) && $currentlang !== $CFG->lang && !get_string_manager()->translation_exists($currentlang)) {
|
|
|
1502 |
// Use the default site language when the current language is not available.
|
|
|
1503 |
$currentlang = $CFG->lang;
|
|
|
1504 |
// Fix the current language.
|
|
|
1505 |
fix_current_language($currentlang);
|
|
|
1506 |
}
|
|
|
1507 |
|
|
|
1508 |
$direction = '';
|
|
|
1509 |
if ($dir) {
|
|
|
1510 |
if (right_to_left()) {
|
|
|
1511 |
$direction = ' dir="rtl"';
|
|
|
1512 |
} else {
|
|
|
1513 |
$direction = ' dir="ltr"';
|
|
|
1514 |
}
|
|
|
1515 |
}
|
|
|
1516 |
|
|
|
1517 |
// Accessibility: added the 'lang' attribute to $direction, used in theme <html> tag.
|
|
|
1518 |
$language = get_html_lang_attribute_value($currentlang);
|
|
|
1519 |
@header('Content-Language: '.$language);
|
|
|
1520 |
return ($direction.' lang="'.$language.'" xml:lang="'.$language.'"');
|
|
|
1521 |
}
|
|
|
1522 |
|
|
|
1523 |
|
|
|
1524 |
// STANDARD WEB PAGE PARTS.
|
|
|
1525 |
|
|
|
1526 |
/**
|
|
|
1527 |
* Send the HTTP headers that Moodle requires.
|
|
|
1528 |
*
|
|
|
1529 |
* There is a backwards compatibility hack for legacy code
|
|
|
1530 |
* that needs to add custom IE compatibility directive.
|
|
|
1531 |
*
|
|
|
1532 |
* Example:
|
|
|
1533 |
* <code>
|
|
|
1534 |
* if (!isset($CFG->additionalhtmlhead)) {
|
|
|
1535 |
* $CFG->additionalhtmlhead = '';
|
|
|
1536 |
* }
|
|
|
1537 |
* $CFG->additionalhtmlhead .= '<meta http-equiv="X-UA-Compatible" content="IE=8" />';
|
|
|
1538 |
* header('X-UA-Compatible: IE=8');
|
|
|
1539 |
* echo $OUTPUT->header();
|
|
|
1540 |
* </code>
|
|
|
1541 |
*
|
|
|
1542 |
* Please note the $CFG->additionalhtmlhead alone might not work,
|
|
|
1543 |
* you should send the IE compatibility header() too.
|
|
|
1544 |
*
|
|
|
1545 |
* @param string $contenttype
|
|
|
1546 |
* @param bool $cacheable Can this page be cached on back?
|
|
|
1547 |
* @return void, sends HTTP headers
|
|
|
1548 |
*/
|
|
|
1549 |
function send_headers($contenttype, $cacheable = true) {
|
|
|
1550 |
global $CFG;
|
|
|
1551 |
|
|
|
1552 |
@header('Content-Type: ' . $contenttype);
|
|
|
1553 |
@header('Content-Script-Type: text/javascript');
|
|
|
1554 |
@header('Content-Style-Type: text/css');
|
|
|
1555 |
|
|
|
1556 |
if (empty($CFG->additionalhtmlhead) or stripos($CFG->additionalhtmlhead, 'X-UA-Compatible') === false) {
|
|
|
1557 |
@header('X-UA-Compatible: IE=edge');
|
|
|
1558 |
}
|
|
|
1559 |
|
|
|
1560 |
if ($cacheable) {
|
|
|
1561 |
// Allow caching on "back" (but not on normal clicks).
|
|
|
1562 |
@header('Cache-Control: private, pre-check=0, post-check=0, max-age=0, no-transform');
|
|
|
1563 |
@header('Pragma: no-cache');
|
|
|
1564 |
@header('Expires: ');
|
|
|
1565 |
} else {
|
|
|
1566 |
// Do everything we can to always prevent clients and proxies caching.
|
| 1441 |
ariadna |
1567 |
@header('Cache-Control: no-store, no-cache, must-revalidate, no-transform');
|
| 1 |
efrain |
1568 |
@header('Pragma: no-cache');
|
|
|
1569 |
@header('Expires: Mon, 20 Aug 1969 09:23:00 GMT');
|
|
|
1570 |
@header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
|
|
|
1571 |
}
|
|
|
1572 |
@header('Accept-Ranges: none');
|
|
|
1573 |
|
|
|
1574 |
// The Moodle app must be allowed to embed content always.
|
|
|
1575 |
if (empty($CFG->allowframembedding) && !core_useragent::is_moodle_app()) {
|
|
|
1576 |
@header('X-Frame-Options: sameorigin');
|
|
|
1577 |
}
|
|
|
1578 |
|
|
|
1579 |
// If referrer policy is set, add a referrer header.
|
|
|
1580 |
if (!empty($CFG->referrerpolicy) && ($CFG->referrerpolicy !== 'default')) {
|
|
|
1581 |
@header('Referrer-Policy: ' . $CFG->referrerpolicy);
|
|
|
1582 |
}
|
|
|
1583 |
}
|
|
|
1584 |
|
|
|
1585 |
/**
|
|
|
1586 |
* Return the right arrow with text ('next'), and optionally embedded in a link.
|
|
|
1587 |
*
|
|
|
1588 |
* @param string $text HTML/plain text label (set to blank only for breadcrumb separator cases).
|
|
|
1589 |
* @param string $url An optional link to use in a surrounding HTML anchor.
|
|
|
1590 |
* @param bool $accesshide True if text should be hidden (for screen readers only).
|
|
|
1591 |
* @param string $addclass Additional class names for the link, or the arrow character.
|
|
|
1592 |
* @return string HTML string.
|
|
|
1593 |
*/
|
|
|
1594 |
function link_arrow_right($text, $url='', $accesshide=false, $addclass='', $addparams = []) {
|
|
|
1595 |
global $OUTPUT; // TODO: move to output renderer.
|
|
|
1596 |
$arrowclass = 'arrow ';
|
|
|
1597 |
if (!$url) {
|
|
|
1598 |
$arrowclass .= $addclass;
|
|
|
1599 |
}
|
|
|
1600 |
$arrow = '<span class="'.$arrowclass.'" aria-hidden="true">'.$OUTPUT->rarrow().'</span>';
|
|
|
1601 |
$htmltext = '';
|
|
|
1602 |
if ($text) {
|
|
|
1603 |
$htmltext = '<span class="arrow_text">'.$text.'</span> ';
|
|
|
1604 |
if ($accesshide) {
|
|
|
1605 |
$htmltext = get_accesshide($htmltext);
|
|
|
1606 |
}
|
|
|
1607 |
}
|
|
|
1608 |
if ($url) {
|
|
|
1609 |
$class = 'arrow_link';
|
|
|
1610 |
if ($addclass) {
|
|
|
1611 |
$class .= ' '.$addclass;
|
|
|
1612 |
}
|
|
|
1613 |
|
|
|
1614 |
$linkparams = [
|
|
|
1615 |
'class' => $class,
|
|
|
1616 |
'href' => $url,
|
|
|
1617 |
'title' => preg_replace('/<.*?>/', '', $text),
|
|
|
1618 |
];
|
|
|
1619 |
|
|
|
1620 |
$linkparams += $addparams;
|
|
|
1621 |
|
|
|
1622 |
return html_writer::link($url, $htmltext . $arrow, $linkparams);
|
|
|
1623 |
}
|
|
|
1624 |
return $htmltext.$arrow;
|
|
|
1625 |
}
|
|
|
1626 |
|
|
|
1627 |
/**
|
|
|
1628 |
* Return the left arrow with text ('previous'), and optionally embedded in a link.
|
|
|
1629 |
*
|
|
|
1630 |
* @param string $text HTML/plain text label (set to blank only for breadcrumb separator cases).
|
|
|
1631 |
* @param string $url An optional link to use in a surrounding HTML anchor.
|
|
|
1632 |
* @param bool $accesshide True if text should be hidden (for screen readers only).
|
|
|
1633 |
* @param string $addclass Additional class names for the link, or the arrow character.
|
|
|
1634 |
* @return string HTML string.
|
|
|
1635 |
*/
|
|
|
1636 |
function link_arrow_left($text, $url='', $accesshide=false, $addclass='', $addparams = []) {
|
|
|
1637 |
global $OUTPUT; // TODO: move to utput renderer.
|
|
|
1638 |
$arrowclass = 'arrow ';
|
|
|
1639 |
if (! $url) {
|
|
|
1640 |
$arrowclass .= $addclass;
|
|
|
1641 |
}
|
|
|
1642 |
$arrow = '<span class="'.$arrowclass.'" aria-hidden="true">'.$OUTPUT->larrow().'</span>';
|
|
|
1643 |
$htmltext = '';
|
|
|
1644 |
if ($text) {
|
|
|
1645 |
$htmltext = ' <span class="arrow_text">'.$text.'</span>';
|
|
|
1646 |
if ($accesshide) {
|
|
|
1647 |
$htmltext = get_accesshide($htmltext);
|
|
|
1648 |
}
|
|
|
1649 |
}
|
|
|
1650 |
if ($url) {
|
|
|
1651 |
$class = 'arrow_link';
|
|
|
1652 |
if ($addclass) {
|
|
|
1653 |
$class .= ' '.$addclass;
|
|
|
1654 |
}
|
|
|
1655 |
|
|
|
1656 |
$linkparams = [
|
|
|
1657 |
'class' => $class,
|
|
|
1658 |
'href' => $url,
|
|
|
1659 |
'title' => preg_replace('/<.*?>/', '', $text),
|
|
|
1660 |
];
|
|
|
1661 |
|
|
|
1662 |
$linkparams += $addparams;
|
|
|
1663 |
|
|
|
1664 |
return html_writer::link($url, $arrow . $htmltext, $linkparams);
|
|
|
1665 |
}
|
|
|
1666 |
return $arrow.$htmltext;
|
|
|
1667 |
}
|
|
|
1668 |
|
|
|
1669 |
/**
|
|
|
1670 |
* Return a HTML element with the class "accesshide", for accessibility.
|
|
|
1671 |
*
|
|
|
1672 |
* Please use cautiously - where possible, text should be visible!
|
|
|
1673 |
*
|
|
|
1674 |
* @param string $text Plain text.
|
|
|
1675 |
* @param string $elem Lowercase element name, default "span".
|
|
|
1676 |
* @param string $class Additional classes for the element.
|
|
|
1677 |
* @param string $attrs Additional attributes string in the form, "name='value' name2='value2'"
|
|
|
1678 |
* @return string HTML string.
|
|
|
1679 |
*/
|
|
|
1680 |
function get_accesshide($text, $elem='span', $class='', $attrs='') {
|
|
|
1681 |
return "<$elem class=\"accesshide $class\" $attrs>$text</$elem>";
|
|
|
1682 |
}
|
|
|
1683 |
|
|
|
1684 |
/**
|
|
|
1685 |
* Return the breadcrumb trail navigation separator.
|
|
|
1686 |
*
|
|
|
1687 |
* @return string HTML string.
|
|
|
1688 |
*/
|
|
|
1689 |
function get_separator() {
|
|
|
1690 |
// Accessibility: the 'hidden' slash is preferred for screen readers.
|
|
|
1691 |
return ' '.link_arrow_right($text='/', $url='', $accesshide=true, 'sep').' ';
|
|
|
1692 |
}
|
|
|
1693 |
|
|
|
1694 |
/**
|
|
|
1695 |
* Print (or return) a collapsible region, that has a caption that can be clicked to expand or collapse the region.
|
|
|
1696 |
*
|
|
|
1697 |
* If JavaScript is off, then the region will always be expanded.
|
|
|
1698 |
*
|
|
|
1699 |
* @param string $contents the contents of the box.
|
|
|
1700 |
* @param string $classes class names added to the div that is output.
|
|
|
1701 |
* @param string $id id added to the div that is output. Must not be blank.
|
|
|
1702 |
* @param string $caption text displayed at the top. Clicking on this will cause the region to expand or contract.
|
|
|
1703 |
* @param string $userpref the name of the user preference that stores the user's preferred default state.
|
|
|
1704 |
* (May be blank if you do not wish the state to be persisted.
|
|
|
1705 |
* @param boolean $default Initial collapsed state to use if the user_preference it not set.
|
|
|
1706 |
* @param boolean $return if true, return the HTML as a string, rather than printing it.
|
|
|
1707 |
* @return string|void If $return is false, returns nothing, otherwise returns a string of HTML.
|
|
|
1708 |
*/
|
|
|
1709 |
function print_collapsible_region($contents, $classes, $id, $caption, $userpref = '', $default = false, $return = false) {
|
|
|
1710 |
$output = print_collapsible_region_start($classes, $id, $caption, $userpref, $default, true);
|
|
|
1711 |
$output .= $contents;
|
|
|
1712 |
$output .= print_collapsible_region_end(true);
|
|
|
1713 |
|
|
|
1714 |
if ($return) {
|
|
|
1715 |
return $output;
|
|
|
1716 |
} else {
|
|
|
1717 |
echo $output;
|
|
|
1718 |
}
|
|
|
1719 |
}
|
|
|
1720 |
|
|
|
1721 |
/**
|
|
|
1722 |
* Print (or return) the start of a collapsible region
|
|
|
1723 |
*
|
|
|
1724 |
* The collapsibleregion has a caption that can be clicked to expand or collapse the region. If JavaScript is off, then the region
|
|
|
1725 |
* will always be expanded.
|
|
|
1726 |
*
|
|
|
1727 |
* @param string $classes class names added to the div that is output.
|
|
|
1728 |
* @param string $id id added to the div that is output. Must not be blank.
|
|
|
1729 |
* @param string $caption text displayed at the top. Clicking on this will cause the region to expand or contract.
|
|
|
1730 |
* @param string $userpref the name of the user preference that stores the user's preferred default state.
|
|
|
1731 |
* (May be blank if you do not wish the state to be persisted.
|
|
|
1732 |
* @param boolean $default Initial collapsed state to use if the user_preference it not set.
|
|
|
1733 |
* @param boolean $return if true, return the HTML as a string, rather than printing it.
|
|
|
1734 |
* @param string $extracontent the extra content will show next to caption, eg.Help icon.
|
|
|
1735 |
* @return string|void if $return is false, returns nothing, otherwise returns a string of HTML.
|
|
|
1736 |
*/
|
|
|
1737 |
function print_collapsible_region_start($classes, $id, $caption, $userpref = '', $default = false, $return = false,
|
|
|
1738 |
$extracontent = null) {
|
|
|
1739 |
global $PAGE;
|
|
|
1740 |
|
|
|
1741 |
// Work out the initial state.
|
|
|
1742 |
if (!empty($userpref) and is_string($userpref)) {
|
|
|
1743 |
$collapsed = get_user_preferences($userpref, $default);
|
|
|
1744 |
} else {
|
|
|
1745 |
$collapsed = $default;
|
|
|
1746 |
$userpref = false;
|
|
|
1747 |
}
|
|
|
1748 |
|
|
|
1749 |
if ($collapsed) {
|
|
|
1750 |
$classes .= ' collapsed';
|
|
|
1751 |
}
|
|
|
1752 |
|
|
|
1753 |
$output = '';
|
|
|
1754 |
$output .= '<div id="' . $id . '" class="collapsibleregion ' . $classes . '">';
|
|
|
1755 |
$output .= '<div id="' . $id . '_sizer">';
|
|
|
1756 |
$output .= '<div id="' . $id . '_caption" class="collapsibleregioncaption">';
|
|
|
1757 |
$output .= $caption . ' </div>';
|
|
|
1758 |
if ($extracontent) {
|
|
|
1759 |
$output .= html_writer::div($extracontent, 'collapsibleregionextracontent');
|
|
|
1760 |
}
|
|
|
1761 |
$output .= '<div id="' . $id . '_inner" class="collapsibleregioninner">';
|
|
|
1762 |
$PAGE->requires->js_init_call('M.util.init_collapsible_region', array($id, $userpref, get_string('clicktohideshow')));
|
|
|
1763 |
|
|
|
1764 |
if ($return) {
|
|
|
1765 |
return $output;
|
|
|
1766 |
} else {
|
|
|
1767 |
echo $output;
|
|
|
1768 |
}
|
|
|
1769 |
}
|
|
|
1770 |
|
|
|
1771 |
/**
|
|
|
1772 |
* Close a region started with print_collapsible_region_start.
|
|
|
1773 |
*
|
|
|
1774 |
* @param boolean $return if true, return the HTML as a string, rather than printing it.
|
|
|
1775 |
* @return string|void if $return is false, returns nothing, otherwise returns a string of HTML.
|
|
|
1776 |
*/
|
|
|
1777 |
function print_collapsible_region_end($return = false) {
|
|
|
1778 |
$output = '</div></div></div>';
|
|
|
1779 |
|
|
|
1780 |
if ($return) {
|
|
|
1781 |
return $output;
|
|
|
1782 |
} else {
|
|
|
1783 |
echo $output;
|
|
|
1784 |
}
|
|
|
1785 |
}
|
|
|
1786 |
|
|
|
1787 |
/**
|
|
|
1788 |
* Print a specified group's avatar.
|
|
|
1789 |
*
|
|
|
1790 |
* @param array|stdClass $group A single {@link group} object OR array of groups.
|
|
|
1791 |
* @param int $courseid The course ID.
|
|
|
1792 |
* @param boolean $large Default small picture, or large.
|
|
|
1793 |
* @param boolean $return If false print picture, otherwise return the output as string
|
|
|
1794 |
* @param boolean $link Enclose image in a link to view specified course?
|
|
|
1795 |
* @param boolean $includetoken Whether to use a user token when displaying this group image.
|
|
|
1796 |
* True indicates to generate a token for current user, and integer value indicates to generate a token for the
|
|
|
1797 |
* user whose id is the value indicated.
|
|
|
1798 |
* If the group picture is included in an e-mail or some other location where the audience is a specific
|
|
|
1799 |
* user who will not be logged in when viewing, then we use a token to authenticate the user.
|
|
|
1800 |
* @return string|void Depending on the setting of $return
|
|
|
1801 |
*/
|
|
|
1802 |
function print_group_picture($group, $courseid, $large = false, $return = false, $link = true, $includetoken = false) {
|
|
|
1803 |
global $CFG;
|
|
|
1804 |
|
|
|
1805 |
if (is_array($group)) {
|
|
|
1806 |
$output = '';
|
|
|
1807 |
foreach ($group as $g) {
|
|
|
1808 |
$output .= print_group_picture($g, $courseid, $large, true, $link, $includetoken);
|
|
|
1809 |
}
|
|
|
1810 |
if ($return) {
|
|
|
1811 |
return $output;
|
|
|
1812 |
} else {
|
|
|
1813 |
echo $output;
|
|
|
1814 |
return;
|
|
|
1815 |
}
|
|
|
1816 |
}
|
|
|
1817 |
|
|
|
1818 |
$pictureurl = get_group_picture_url($group, $courseid, $large, $includetoken);
|
|
|
1819 |
|
|
|
1820 |
// If there is no picture, do nothing.
|
|
|
1821 |
if (!isset($pictureurl)) {
|
|
|
1822 |
return;
|
|
|
1823 |
}
|
|
|
1824 |
|
|
|
1825 |
$context = context_course::instance($courseid);
|
|
|
1826 |
|
|
|
1827 |
$groupname = s($group->name);
|
|
|
1828 |
$pictureimage = html_writer::img($pictureurl, $groupname, ['title' => $groupname]);
|
|
|
1829 |
|
|
|
1830 |
$output = '';
|
|
|
1831 |
if ($link or has_capability('moodle/site:accessallgroups', $context)) {
|
|
|
1832 |
$linkurl = new moodle_url('/user/index.php', ['id' => $courseid, 'group' => $group->id]);
|
|
|
1833 |
$output .= html_writer::link($linkurl, $pictureimage);
|
|
|
1834 |
} else {
|
|
|
1835 |
$output .= $pictureimage;
|
|
|
1836 |
}
|
|
|
1837 |
|
|
|
1838 |
if ($return) {
|
|
|
1839 |
return $output;
|
|
|
1840 |
} else {
|
|
|
1841 |
echo $output;
|
|
|
1842 |
}
|
|
|
1843 |
}
|
|
|
1844 |
|
|
|
1845 |
/**
|
|
|
1846 |
* Return the url to the group picture.
|
|
|
1847 |
*
|
|
|
1848 |
* @param stdClass $group A group object.
|
|
|
1849 |
* @param int $courseid The course ID for the group.
|
|
|
1850 |
* @param bool $large A large or small group picture? Default is small.
|
|
|
1851 |
* @param boolean $includetoken Whether to use a user token when displaying this group image.
|
|
|
1852 |
* True indicates to generate a token for current user, and integer value indicates to generate a token for the
|
|
|
1853 |
* user whose id is the value indicated.
|
|
|
1854 |
* If the group picture is included in an e-mail or some other location where the audience is a specific
|
|
|
1855 |
* user who will not be logged in when viewing, then we use a token to authenticate the user.
|
|
|
1856 |
* @return ?moodle_url Returns the url for the group picture.
|
|
|
1857 |
*/
|
|
|
1858 |
function get_group_picture_url($group, $courseid, $large = false, $includetoken = false) {
|
|
|
1859 |
global $CFG;
|
|
|
1860 |
|
|
|
1861 |
$context = context_course::instance($courseid);
|
|
|
1862 |
|
|
|
1863 |
// If there is no picture, do nothing.
|
|
|
1864 |
if (!$group->picture) {
|
|
|
1865 |
return;
|
|
|
1866 |
}
|
|
|
1867 |
|
|
|
1868 |
if ($large) {
|
|
|
1869 |
$file = 'f1';
|
|
|
1870 |
} else {
|
|
|
1871 |
$file = 'f2';
|
|
|
1872 |
}
|
|
|
1873 |
|
|
|
1874 |
$grouppictureurl = moodle_url::make_pluginfile_url(
|
|
|
1875 |
$context->id, 'group', 'icon', $group->id, '/', $file, false, $includetoken);
|
|
|
1876 |
$grouppictureurl->param('rev', $group->picture);
|
|
|
1877 |
return $grouppictureurl;
|
|
|
1878 |
}
|
|
|
1879 |
|
|
|
1880 |
|
|
|
1881 |
/**
|
|
|
1882 |
* Display a recent activity note
|
|
|
1883 |
*
|
|
|
1884 |
* @staticvar string $strftimerecent
|
|
|
1885 |
* @param int $time A timestamp int.
|
|
|
1886 |
* @param stdClass $user A user object from the database.
|
|
|
1887 |
* @param string $text Text for display for the note
|
|
|
1888 |
* @param string $link The link to wrap around the text
|
|
|
1889 |
* @param bool $return If set to true the HTML is returned rather than echo'd
|
|
|
1890 |
* @param string $viewfullnames
|
|
|
1891 |
* @return ?string If $retrun was true returns HTML for a recent activity notice.
|
|
|
1892 |
*/
|
|
|
1893 |
function print_recent_activity_note($time, $user, $text, $link, $return=false, $viewfullnames=null) {
|
|
|
1894 |
static $strftimerecent = null;
|
|
|
1895 |
$output = '';
|
|
|
1896 |
|
|
|
1897 |
if (is_null($viewfullnames)) {
|
|
|
1898 |
$context = context_system::instance();
|
|
|
1899 |
$viewfullnames = has_capability('moodle/site:viewfullnames', $context);
|
|
|
1900 |
}
|
|
|
1901 |
|
|
|
1902 |
if (is_null($strftimerecent)) {
|
|
|
1903 |
$strftimerecent = get_string('strftimerecent');
|
|
|
1904 |
}
|
|
|
1905 |
|
|
|
1906 |
$output .= '<div class="head">';
|
|
|
1907 |
$output .= '<div class="date">'.userdate($time, $strftimerecent).'</div>';
|
|
|
1908 |
$output .= '<div class="name">'.fullname($user, $viewfullnames).'</div>';
|
|
|
1909 |
$output .= '</div>';
|
|
|
1910 |
$output .= '<div class="info"><a href="'.$link.'">'.format_string($text, true).'</a></div>';
|
|
|
1911 |
|
|
|
1912 |
if ($return) {
|
|
|
1913 |
return $output;
|
|
|
1914 |
} else {
|
|
|
1915 |
echo $output;
|
|
|
1916 |
}
|
|
|
1917 |
}
|
|
|
1918 |
|
|
|
1919 |
/**
|
|
|
1920 |
* Returns a popup menu with course activity modules
|
|
|
1921 |
*
|
|
|
1922 |
* Given a course this function returns a small popup menu with all the course activity modules in it, as a navigation menu
|
|
|
1923 |
* outputs a simple list structure in XHTML.
|
|
|
1924 |
* The data is taken from the serialised array stored in the course record.
|
|
|
1925 |
*
|
|
|
1926 |
* @param stdClass $course A course object.
|
|
|
1927 |
* @param array $sections
|
|
|
1928 |
* @param course_modinfo $modinfo
|
|
|
1929 |
* @param string $strsection
|
|
|
1930 |
* @param string $strjumpto
|
|
|
1931 |
* @param int $width
|
|
|
1932 |
* @param string $cmid
|
|
|
1933 |
* @return string The HTML block
|
|
|
1934 |
*/
|
|
|
1935 |
function navmenulist($course, $sections, $modinfo, $strsection, $strjumpto, $width=50, $cmid=0) {
|
|
|
1936 |
|
|
|
1937 |
global $CFG, $OUTPUT;
|
|
|
1938 |
|
|
|
1939 |
$section = -1;
|
|
|
1940 |
$menu = array();
|
|
|
1941 |
$doneheading = false;
|
|
|
1942 |
|
|
|
1943 |
$courseformatoptions = course_get_format($course)->get_format_options();
|
|
|
1944 |
$coursecontext = context_course::instance($course->id);
|
|
|
1945 |
|
|
|
1946 |
$menu[] = '<ul class="navmenulist"><li class="jumpto section"><span>'.$strjumpto.'</span><ul>';
|
|
|
1947 |
foreach ($modinfo->cms as $mod) {
|
|
|
1948 |
if (!$mod->has_view()) {
|
|
|
1949 |
// Don't show modules which you can't link to!
|
|
|
1950 |
continue;
|
|
|
1951 |
}
|
|
|
1952 |
|
|
|
1953 |
// For course formats using 'numsections' do not show extra sections.
|
|
|
1954 |
if (isset($courseformatoptions['numsections']) && $mod->sectionnum > $courseformatoptions['numsections']) {
|
|
|
1955 |
break;
|
|
|
1956 |
}
|
|
|
1957 |
|
|
|
1958 |
if (!$mod->uservisible) { // Do not icnlude empty sections at all.
|
|
|
1959 |
continue;
|
|
|
1960 |
}
|
|
|
1961 |
|
|
|
1962 |
if ($mod->sectionnum >= 0 and $section != $mod->sectionnum) {
|
|
|
1963 |
$thissection = $sections[$mod->sectionnum];
|
|
|
1964 |
|
|
|
1965 |
if ($thissection->visible or
|
|
|
1966 |
(isset($courseformatoptions['hiddensections']) and !$courseformatoptions['hiddensections']) or
|
|
|
1967 |
has_capability('moodle/course:viewhiddensections', $coursecontext)) {
|
|
|
1968 |
$thissection->summary = strip_tags(format_string($thissection->summary, true));
|
|
|
1969 |
if (!$doneheading) {
|
|
|
1970 |
$menu[] = '</ul></li>';
|
|
|
1971 |
}
|
|
|
1972 |
if ($course->format == 'weeks' or empty($thissection->summary)) {
|
|
|
1973 |
$item = $strsection ." ". $mod->sectionnum;
|
|
|
1974 |
} else {
|
|
|
1975 |
if (core_text::strlen($thissection->summary) < ($width-3)) {
|
|
|
1976 |
$item = $thissection->summary;
|
|
|
1977 |
} else {
|
|
|
1978 |
$item = core_text::substr($thissection->summary, 0, $width).'...';
|
|
|
1979 |
}
|
|
|
1980 |
}
|
|
|
1981 |
$menu[] = '<li class="section"><span>'.$item.'</span>';
|
|
|
1982 |
$menu[] = '<ul>';
|
|
|
1983 |
$doneheading = true;
|
|
|
1984 |
|
|
|
1985 |
$section = $mod->sectionnum;
|
|
|
1986 |
} else {
|
|
|
1987 |
// No activities from this hidden section shown.
|
|
|
1988 |
continue;
|
|
|
1989 |
}
|
|
|
1990 |
}
|
|
|
1991 |
|
|
|
1992 |
$url = $mod->modname .'/view.php?id='. $mod->id;
|
|
|
1993 |
$mod->name = strip_tags(format_string($mod->name ,true));
|
|
|
1994 |
if (core_text::strlen($mod->name) > ($width+5)) {
|
|
|
1995 |
$mod->name = core_text::substr($mod->name, 0, $width).'...';
|
|
|
1996 |
}
|
|
|
1997 |
if (!$mod->visible) {
|
|
|
1998 |
$mod->name = '('.$mod->name.')';
|
|
|
1999 |
}
|
|
|
2000 |
$class = 'activity '.$mod->modname;
|
|
|
2001 |
$class .= ($cmid == $mod->id) ? ' selected' : '';
|
|
|
2002 |
$menu[] = '<li class="'.$class.'">'.
|
|
|
2003 |
$OUTPUT->image_icon('monologo', '', $mod->modname).
|
|
|
2004 |
'<a href="'.$CFG->wwwroot.'/mod/'.$url.'">'.$mod->name.'</a></li>';
|
|
|
2005 |
}
|
|
|
2006 |
|
|
|
2007 |
if ($doneheading) {
|
|
|
2008 |
$menu[] = '</ul></li>';
|
|
|
2009 |
}
|
|
|
2010 |
$menu[] = '</ul></li></ul>';
|
|
|
2011 |
|
|
|
2012 |
return implode("\n", $menu);
|
|
|
2013 |
}
|
|
|
2014 |
|
|
|
2015 |
/**
|
|
|
2016 |
* Print an error to STDOUT and exit with a non-zero code. For commandline scripts.
|
|
|
2017 |
*
|
|
|
2018 |
* Default errorcode is 1.
|
|
|
2019 |
*
|
|
|
2020 |
* Very useful for perl-like error-handling:
|
|
|
2021 |
* do_somethting() or mdie("Something went wrong");
|
|
|
2022 |
*
|
|
|
2023 |
* @param string $msg Error message
|
|
|
2024 |
* @param integer $errorcode Error code to emit
|
|
|
2025 |
*/
|
|
|
2026 |
function mdie($msg='', $errorcode=1) {
|
|
|
2027 |
trigger_error($msg);
|
|
|
2028 |
exit($errorcode);
|
|
|
2029 |
}
|
|
|
2030 |
|
|
|
2031 |
/**
|
|
|
2032 |
* Print a message and exit.
|
|
|
2033 |
*
|
|
|
2034 |
* @param string $message The message to print in the notice
|
|
|
2035 |
* @param moodle_url|string $link The link to use for the continue button
|
|
|
2036 |
* @param object $course A course object. Unused.
|
|
|
2037 |
* @return void This function simply exits
|
|
|
2038 |
*/
|
|
|
2039 |
function notice ($message, $link='', $course=null) {
|
|
|
2040 |
global $PAGE, $OUTPUT;
|
|
|
2041 |
|
|
|
2042 |
$message = clean_text($message); // In case nasties are in here.
|
|
|
2043 |
|
|
|
2044 |
if (CLI_SCRIPT) {
|
|
|
2045 |
echo("!!$message!!\n");
|
|
|
2046 |
exit(1); // No success.
|
|
|
2047 |
}
|
|
|
2048 |
|
|
|
2049 |
if (!$PAGE->headerprinted) {
|
|
|
2050 |
// Header not yet printed.
|
|
|
2051 |
$PAGE->set_title(get_string('notice'));
|
|
|
2052 |
echo $OUTPUT->header();
|
|
|
2053 |
} else {
|
|
|
2054 |
echo $OUTPUT->container_end_all(false);
|
|
|
2055 |
}
|
|
|
2056 |
|
|
|
2057 |
echo $OUTPUT->box($message, 'generalbox', 'notice');
|
|
|
2058 |
echo $OUTPUT->continue_button($link);
|
|
|
2059 |
|
|
|
2060 |
echo $OUTPUT->footer();
|
|
|
2061 |
exit(1); // General error code.
|
|
|
2062 |
}
|
|
|
2063 |
|
|
|
2064 |
/**
|
|
|
2065 |
* Redirects the user to another page, after printing a notice.
|
|
|
2066 |
*
|
|
|
2067 |
* This function calls the OUTPUT redirect method, echo's the output and then dies to ensure nothing else happens.
|
|
|
2068 |
*
|
|
|
2069 |
* <strong>Good practice:</strong> You should call this method before starting page
|
|
|
2070 |
* output by using any of the OUTPUT methods.
|
|
|
2071 |
*
|
|
|
2072 |
* @param moodle_url|string $url A moodle_url to redirect to. Strings are not to be trusted!
|
|
|
2073 |
* @param string $message The message to display to the user
|
|
|
2074 |
* @param int $delay The delay before redirecting
|
|
|
2075 |
* @param string $messagetype The type of notification to show the message in. See constants on \core\output\notification.
|
|
|
2076 |
* @throws moodle_exception
|
|
|
2077 |
*/
|
| 1441 |
ariadna |
2078 |
function redirect($url, $message='', $delay=null, $messagetype = \core\output\notification::NOTIFY_INFO): Never {
|
| 1 |
efrain |
2079 |
global $OUTPUT, $PAGE, $CFG;
|
|
|
2080 |
|
|
|
2081 |
if (CLI_SCRIPT or AJAX_SCRIPT) {
|
|
|
2082 |
// This is wrong - developers should not use redirect in these scripts but it should not be very likely.
|
|
|
2083 |
throw new moodle_exception('redirecterrordetected', 'error');
|
|
|
2084 |
}
|
|
|
2085 |
|
|
|
2086 |
if ($delay === null) {
|
|
|
2087 |
$delay = -1;
|
|
|
2088 |
}
|
|
|
2089 |
|
|
|
2090 |
// Prevent debug errors - make sure context is properly initialised.
|
|
|
2091 |
if ($PAGE) {
|
|
|
2092 |
$PAGE->set_context(null);
|
|
|
2093 |
$PAGE->set_pagelayout('redirect'); // No header and footer needed.
|
|
|
2094 |
$PAGE->set_title(get_string('pageshouldredirect', 'moodle'));
|
|
|
2095 |
}
|
|
|
2096 |
|
|
|
2097 |
if ($url instanceof moodle_url) {
|
|
|
2098 |
$url = $url->out(false);
|
|
|
2099 |
}
|
|
|
2100 |
|
|
|
2101 |
$debugdisableredirect = false;
|
|
|
2102 |
do {
|
|
|
2103 |
if (defined('DEBUGGING_PRINTED')) {
|
|
|
2104 |
// Some debugging already printed, no need to look more.
|
|
|
2105 |
$debugdisableredirect = true;
|
|
|
2106 |
break;
|
|
|
2107 |
}
|
|
|
2108 |
|
|
|
2109 |
if (core_useragent::is_msword()) {
|
|
|
2110 |
// Clicking a URL from MS Word sends a request to the server without cookies. If that
|
|
|
2111 |
// causes a redirect Word will open a browser pointing the new URL. If not, the URL that
|
|
|
2112 |
// was clicked is opened. Because the request from Word is without cookies, it almost
|
|
|
2113 |
// always results in a redirect to the login page, even if the user is logged in in their
|
|
|
2114 |
// browser. This is not what we want, so prevent the redirect for requests from Word.
|
|
|
2115 |
$debugdisableredirect = true;
|
|
|
2116 |
break;
|
|
|
2117 |
}
|
|
|
2118 |
|
|
|
2119 |
if (empty($CFG->debugdisplay) or empty($CFG->debug)) {
|
|
|
2120 |
// No errors should be displayed.
|
|
|
2121 |
break;
|
|
|
2122 |
}
|
|
|
2123 |
|
|
|
2124 |
if (!function_exists('error_get_last') or !$lasterror = error_get_last()) {
|
|
|
2125 |
break;
|
|
|
2126 |
}
|
|
|
2127 |
|
|
|
2128 |
if (!($lasterror['type'] & $CFG->debug)) {
|
|
|
2129 |
// Last error not interesting.
|
|
|
2130 |
break;
|
|
|
2131 |
}
|
|
|
2132 |
|
|
|
2133 |
// Watch out here, @hidden() errors are returned from error_get_last() too.
|
|
|
2134 |
if (headers_sent()) {
|
|
|
2135 |
// We already started printing something - that means errors likely printed.
|
|
|
2136 |
$debugdisableredirect = true;
|
|
|
2137 |
break;
|
|
|
2138 |
}
|
|
|
2139 |
|
|
|
2140 |
if (ob_get_level() and ob_get_contents()) {
|
|
|
2141 |
// There is something waiting to be printed, hopefully it is the errors,
|
|
|
2142 |
// but it might be some error hidden by @ too - such as the timezone mess from setup.php.
|
|
|
2143 |
$debugdisableredirect = true;
|
|
|
2144 |
break;
|
|
|
2145 |
}
|
|
|
2146 |
} while (false);
|
|
|
2147 |
|
|
|
2148 |
// Technically, HTTP/1.1 requires Location: header to contain the absolute path.
|
|
|
2149 |
// (In practice browsers accept relative paths - but still, might as well do it properly.)
|
|
|
2150 |
// This code turns relative into absolute.
|
|
|
2151 |
if (!preg_match('|^[a-z]+:|i', $url)) {
|
|
|
2152 |
// Get host name http://www.wherever.com.
|
|
|
2153 |
$hostpart = preg_replace('|^(.*?[^:/])/.*$|', '$1', $CFG->wwwroot);
|
|
|
2154 |
if (preg_match('|^/|', $url)) {
|
|
|
2155 |
// URLs beginning with / are relative to web server root so we just add them in.
|
|
|
2156 |
$url = $hostpart.$url;
|
|
|
2157 |
} else {
|
|
|
2158 |
// URLs not beginning with / are relative to path of current script, so add that on.
|
|
|
2159 |
$url = $hostpart.preg_replace('|\?.*$|', '', me()).'/../'.$url;
|
|
|
2160 |
}
|
|
|
2161 |
// Replace all ..s.
|
|
|
2162 |
while (true) {
|
|
|
2163 |
$newurl = preg_replace('|/(?!\.\.)[^/]*/\.\./|', '/', $url);
|
|
|
2164 |
if ($newurl == $url) {
|
|
|
2165 |
break;
|
|
|
2166 |
}
|
|
|
2167 |
$url = $newurl;
|
|
|
2168 |
}
|
|
|
2169 |
}
|
|
|
2170 |
|
|
|
2171 |
// Sanitise url - we can not rely on moodle_url or our URL cleaning
|
|
|
2172 |
// because they do not support all valid external URLs.
|
|
|
2173 |
$url = preg_replace('/[\x00-\x1F\x7F]/', '', $url);
|
|
|
2174 |
$url = str_replace('"', '%22', $url);
|
|
|
2175 |
$encodedurl = preg_replace("/\&(?![a-zA-Z0-9#]{1,8};)/", "&", $url);
|
|
|
2176 |
$encodedurl = preg_replace('/^.*href="([^"]*)".*$/', "\\1", clean_text('<a href="'.$encodedurl.'" />', FORMAT_HTML));
|
|
|
2177 |
$url = str_replace('&', '&', $encodedurl);
|
|
|
2178 |
|
|
|
2179 |
if (!empty($message)) {
|
|
|
2180 |
if (!$debugdisableredirect && !headers_sent()) {
|
|
|
2181 |
// A message has been provided, and the headers have not yet been sent.
|
|
|
2182 |
// Display the message as a notification on the subsequent page.
|
|
|
2183 |
\core\notification::add($message, $messagetype);
|
|
|
2184 |
$message = null;
|
|
|
2185 |
$delay = 0;
|
|
|
2186 |
} else {
|
|
|
2187 |
if ($delay === -1 || !is_numeric($delay)) {
|
|
|
2188 |
$delay = 3;
|
|
|
2189 |
}
|
|
|
2190 |
$message = clean_text($message);
|
|
|
2191 |
}
|
|
|
2192 |
} else {
|
|
|
2193 |
$message = get_string('pageshouldredirect');
|
|
|
2194 |
$delay = 0;
|
|
|
2195 |
}
|
|
|
2196 |
|
|
|
2197 |
// Make sure the session is closed properly, this prevents problems in IIS
|
|
|
2198 |
// and also some potential PHP shutdown issues.
|
|
|
2199 |
\core\session\manager::write_close();
|
|
|
2200 |
|
|
|
2201 |
if ($delay == 0 && !$debugdisableredirect && !headers_sent()) {
|
|
|
2202 |
|
|
|
2203 |
// This helps when debugging redirect issues like loops and it is not clear
|
|
|
2204 |
// which layer in the stack sent the redirect header. If debugging is on
|
|
|
2205 |
// then the file and line is also shown.
|
|
|
2206 |
$redirectby = 'Moodle';
|
|
|
2207 |
if (debugging('', DEBUG_DEVELOPER)) {
|
|
|
2208 |
$origin = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 1)[0];
|
|
|
2209 |
$redirectby .= ' /' . str_replace($CFG->dirroot . '/', '', $origin['file']) . ':' . $origin['line'];
|
|
|
2210 |
}
|
|
|
2211 |
@header("X-Redirect-By: $redirectby");
|
|
|
2212 |
|
|
|
2213 |
// 302 might not work for POST requests, 303 is ignored by obsolete clients.
|
|
|
2214 |
@header($_SERVER['SERVER_PROTOCOL'] . ' 303 See Other');
|
|
|
2215 |
@header('Location: '.$url);
|
|
|
2216 |
echo bootstrap_renderer::plain_redirect_message($encodedurl);
|
|
|
2217 |
exit;
|
|
|
2218 |
}
|
|
|
2219 |
|
|
|
2220 |
// Include a redirect message, even with a HTTP redirect, because that is recommended practice.
|
|
|
2221 |
if ($PAGE) {
|
|
|
2222 |
$CFG->docroot = false; // To prevent the link to moodle docs from being displayed on redirect page.
|
|
|
2223 |
echo $OUTPUT->redirect_message($encodedurl, $message, $delay, $debugdisableredirect, $messagetype);
|
|
|
2224 |
exit;
|
|
|
2225 |
} else {
|
|
|
2226 |
echo bootstrap_renderer::early_redirect_message($encodedurl, $message, $delay);
|
|
|
2227 |
exit;
|
|
|
2228 |
}
|
|
|
2229 |
}
|
|
|
2230 |
|
|
|
2231 |
/**
|
|
|
2232 |
* Given an email address, this function will return an obfuscated version of it.
|
|
|
2233 |
*
|
|
|
2234 |
* @param string $email The email address to obfuscate
|
|
|
2235 |
* @return string The obfuscated email address
|
|
|
2236 |
*/
|
|
|
2237 |
function obfuscate_email($email) {
|
|
|
2238 |
$i = 0;
|
|
|
2239 |
$length = strlen($email);
|
|
|
2240 |
$obfuscated = '';
|
|
|
2241 |
while ($i < $length) {
|
|
|
2242 |
if (rand(0, 2) && $email[$i]!='@') { // MDL-20619 some browsers have problems unobfuscating @.
|
|
|
2243 |
$obfuscated.='%'.dechex(ord($email[$i]));
|
|
|
2244 |
} else {
|
|
|
2245 |
$obfuscated.=$email[$i];
|
|
|
2246 |
}
|
|
|
2247 |
$i++;
|
|
|
2248 |
}
|
|
|
2249 |
return $obfuscated;
|
|
|
2250 |
}
|
|
|
2251 |
|
|
|
2252 |
/**
|
|
|
2253 |
* This function takes some text and replaces about half of the characters
|
|
|
2254 |
* with HTML entity equivalents. Return string is obviously longer.
|
|
|
2255 |
*
|
|
|
2256 |
* @param string $plaintext The text to be obfuscated
|
|
|
2257 |
* @return string The obfuscated text
|
|
|
2258 |
*/
|
|
|
2259 |
function obfuscate_text($plaintext) {
|
|
|
2260 |
$i=0;
|
|
|
2261 |
$length = core_text::strlen($plaintext);
|
|
|
2262 |
$obfuscated='';
|
|
|
2263 |
$prevobfuscated = false;
|
|
|
2264 |
while ($i < $length) {
|
|
|
2265 |
$char = core_text::substr($plaintext, $i, 1);
|
|
|
2266 |
$ord = core_text::utf8ord($char);
|
|
|
2267 |
$numerical = ($ord >= ord('0')) && ($ord <= ord('9'));
|
|
|
2268 |
if ($prevobfuscated and $numerical ) {
|
|
|
2269 |
$obfuscated.='&#'.$ord.';';
|
|
|
2270 |
} else if (rand(0, 2)) {
|
|
|
2271 |
$obfuscated.='&#'.$ord.';';
|
|
|
2272 |
$prevobfuscated = true;
|
|
|
2273 |
} else {
|
|
|
2274 |
$obfuscated.=$char;
|
|
|
2275 |
$prevobfuscated = false;
|
|
|
2276 |
}
|
|
|
2277 |
$i++;
|
|
|
2278 |
}
|
|
|
2279 |
return $obfuscated;
|
|
|
2280 |
}
|
|
|
2281 |
|
|
|
2282 |
/**
|
|
|
2283 |
* This function uses the {@link obfuscate_email()} and {@link obfuscate_text()}
|
|
|
2284 |
* to generate a fully obfuscated email link, ready to use.
|
|
|
2285 |
*
|
|
|
2286 |
* @param string $email The email address to display
|
|
|
2287 |
* @param string $label The text to displayed as hyperlink to $email
|
|
|
2288 |
* @param boolean $dimmed If true then use css class 'dimmed' for hyperlink
|
|
|
2289 |
* @param string $subject The subject of the email in the mailto link
|
|
|
2290 |
* @param string $body The content of the email in the mailto link
|
|
|
2291 |
* @return string The obfuscated mailto link
|
|
|
2292 |
*/
|
|
|
2293 |
function obfuscate_mailto($email, $label='', $dimmed=false, $subject = '', $body = '') {
|
|
|
2294 |
|
|
|
2295 |
if (empty($label)) {
|
|
|
2296 |
$label = $email;
|
|
|
2297 |
}
|
|
|
2298 |
|
|
|
2299 |
$label = obfuscate_text($label);
|
|
|
2300 |
$email = obfuscate_email($email);
|
|
|
2301 |
$mailto = obfuscate_text('mailto');
|
|
|
2302 |
$url = new moodle_url("mailto:$email");
|
|
|
2303 |
$attrs = array();
|
|
|
2304 |
|
|
|
2305 |
if (!empty($subject)) {
|
|
|
2306 |
$url->param('subject', format_string($subject));
|
|
|
2307 |
}
|
|
|
2308 |
if (!empty($body)) {
|
|
|
2309 |
$url->param('body', format_string($body));
|
|
|
2310 |
}
|
|
|
2311 |
|
|
|
2312 |
// Use the obfuscated mailto.
|
|
|
2313 |
$url = preg_replace('/^mailto/', $mailto, $url->out());
|
|
|
2314 |
|
|
|
2315 |
if ($dimmed) {
|
|
|
2316 |
$attrs['title'] = get_string('emaildisable');
|
|
|
2317 |
$attrs['class'] = 'dimmed';
|
|
|
2318 |
}
|
|
|
2319 |
|
|
|
2320 |
return html_writer::link($url, $label, $attrs);
|
|
|
2321 |
}
|
|
|
2322 |
|
|
|
2323 |
/**
|
|
|
2324 |
* This function is used to rebuild the <nolink> tag because some formats (PLAIN and WIKI)
|
|
|
2325 |
* will transform it to html entities
|
|
|
2326 |
*
|
|
|
2327 |
* @param string $text Text to search for nolink tag in
|
|
|
2328 |
* @return string
|
|
|
2329 |
*/
|
|
|
2330 |
function rebuildnolinktag($text) {
|
|
|
2331 |
|
|
|
2332 |
$text = preg_replace('/<(\/*nolink)>/i', '<$1>', $text);
|
|
|
2333 |
|
|
|
2334 |
return $text;
|
|
|
2335 |
}
|
|
|
2336 |
|
|
|
2337 |
/**
|
|
|
2338 |
* Prints a maintenance message from $CFG->maintenance_message or default if empty.
|
|
|
2339 |
*/
|
|
|
2340 |
function print_maintenance_message() {
|
|
|
2341 |
global $CFG, $SITE, $PAGE, $OUTPUT;
|
|
|
2342 |
|
|
|
2343 |
header($_SERVER['SERVER_PROTOCOL'] . ' 503 Moodle under maintenance');
|
|
|
2344 |
header('Status: 503 Moodle under maintenance');
|
|
|
2345 |
header('Retry-After: 300');
|
|
|
2346 |
|
|
|
2347 |
$PAGE->set_pagetype('maintenance-message');
|
|
|
2348 |
$PAGE->set_pagelayout('maintenance');
|
|
|
2349 |
$PAGE->set_heading($SITE->fullname);
|
|
|
2350 |
echo $OUTPUT->header();
|
|
|
2351 |
echo $OUTPUT->heading(get_string('sitemaintenance', 'admin'));
|
|
|
2352 |
if (isset($CFG->maintenance_message) and !html_is_blank($CFG->maintenance_message)) {
|
|
|
2353 |
echo $OUTPUT->box_start('maintenance_message generalbox boxwidthwide boxaligncenter');
|
|
|
2354 |
echo $CFG->maintenance_message;
|
|
|
2355 |
echo $OUTPUT->box_end();
|
|
|
2356 |
}
|
|
|
2357 |
echo $OUTPUT->footer();
|
|
|
2358 |
die;
|
|
|
2359 |
}
|
|
|
2360 |
|
|
|
2361 |
/**
|
|
|
2362 |
* Returns a string containing a nested list, suitable for formatting into tabs with CSS.
|
|
|
2363 |
*
|
|
|
2364 |
* It is not recommended to use this function in Moodle 2.5 but it is left for backward
|
|
|
2365 |
* compartibility.
|
|
|
2366 |
*
|
|
|
2367 |
* Example how to print a single line tabs:
|
|
|
2368 |
* $rows = array(
|
|
|
2369 |
* new tabobject(...),
|
|
|
2370 |
* new tabobject(...)
|
|
|
2371 |
* );
|
|
|
2372 |
* echo $OUTPUT->tabtree($rows, $selectedid);
|
|
|
2373 |
*
|
|
|
2374 |
* Multiple row tabs may not look good on some devices but if you want to use them
|
|
|
2375 |
* you can specify ->subtree for the active tabobject.
|
|
|
2376 |
*
|
|
|
2377 |
* @param array $tabrows An array of rows where each row is an array of tab objects
|
|
|
2378 |
* @param string $selected The id of the selected tab (whatever row it's on)
|
|
|
2379 |
* @param array $inactive An array of ids of inactive tabs that are not selectable.
|
|
|
2380 |
* @param array $activated An array of ids of other tabs that are currently activated
|
|
|
2381 |
* @param bool $return If true output is returned rather then echo'd
|
|
|
2382 |
* @return string HTML output if $return was set to true.
|
|
|
2383 |
*/
|
|
|
2384 |
function print_tabs($tabrows, $selected = null, $inactive = null, $activated = null, $return = false) {
|
|
|
2385 |
global $OUTPUT;
|
|
|
2386 |
|
|
|
2387 |
$tabrows = array_reverse($tabrows);
|
|
|
2388 |
$subtree = array();
|
|
|
2389 |
foreach ($tabrows as $row) {
|
|
|
2390 |
$tree = array();
|
|
|
2391 |
|
|
|
2392 |
foreach ($row as $tab) {
|
|
|
2393 |
$tab->inactive = is_array($inactive) && in_array((string)$tab->id, $inactive);
|
|
|
2394 |
$tab->activated = is_array($activated) && in_array((string)$tab->id, $activated);
|
|
|
2395 |
$tab->selected = (string)$tab->id == $selected;
|
|
|
2396 |
|
|
|
2397 |
if ($tab->activated || $tab->selected) {
|
|
|
2398 |
$tab->subtree = $subtree;
|
|
|
2399 |
}
|
|
|
2400 |
$tree[] = $tab;
|
|
|
2401 |
}
|
|
|
2402 |
$subtree = $tree;
|
|
|
2403 |
}
|
|
|
2404 |
$output = $OUTPUT->tabtree($subtree);
|
|
|
2405 |
if ($return) {
|
|
|
2406 |
return $output;
|
|
|
2407 |
} else {
|
|
|
2408 |
print $output;
|
|
|
2409 |
return !empty($output);
|
|
|
2410 |
}
|
|
|
2411 |
}
|
|
|
2412 |
|
|
|
2413 |
/**
|
|
|
2414 |
* Alter debugging level for the current request,
|
|
|
2415 |
* the change is not saved in database.
|
|
|
2416 |
*
|
|
|
2417 |
* @param int $level one of the DEBUG_* constants
|
|
|
2418 |
* @param bool $debugdisplay
|
|
|
2419 |
*/
|
|
|
2420 |
function set_debugging($level, $debugdisplay = null) {
|
|
|
2421 |
global $CFG;
|
|
|
2422 |
|
|
|
2423 |
$CFG->debug = (int)$level;
|
|
|
2424 |
$CFG->debugdeveloper = (($CFG->debug & DEBUG_DEVELOPER) === DEBUG_DEVELOPER);
|
|
|
2425 |
|
|
|
2426 |
if ($debugdisplay !== null) {
|
|
|
2427 |
$CFG->debugdisplay = (bool)$debugdisplay;
|
|
|
2428 |
}
|
|
|
2429 |
}
|
|
|
2430 |
|
|
|
2431 |
/**
|
|
|
2432 |
* Standard Debugging Function
|
|
|
2433 |
*
|
|
|
2434 |
* Returns true if the current site debugging settings are equal or above specified level.
|
|
|
2435 |
* If passed a parameter it will emit a debugging notice similar to trigger_error(). The
|
|
|
2436 |
* routing of notices is controlled by $CFG->debugdisplay
|
|
|
2437 |
* eg use like this:
|
|
|
2438 |
*
|
|
|
2439 |
* 1) debugging('a normal debug notice');
|
|
|
2440 |
* 2) debugging('something really picky', DEBUG_ALL);
|
|
|
2441 |
* 3) debugging('annoying debug message only for developers', DEBUG_DEVELOPER);
|
|
|
2442 |
* 4) if (debugging()) { perform extra debugging operations (do not use print or echo) }
|
|
|
2443 |
*
|
|
|
2444 |
* In code blocks controlled by debugging() (such as example 4)
|
|
|
2445 |
* any output should be routed via debugging() itself, or the lower-level
|
|
|
2446 |
* trigger_error() or error_log(). Using echo or print will break XHTML
|
|
|
2447 |
* JS and HTTP headers.
|
|
|
2448 |
*
|
|
|
2449 |
* It is also possible to define NO_DEBUG_DISPLAY which redirects the message to error_log.
|
|
|
2450 |
*
|
|
|
2451 |
* @param string $message a message to print
|
|
|
2452 |
* @param int $level the level at which this debugging statement should show
|
|
|
2453 |
* @param array $backtrace use different backtrace
|
|
|
2454 |
* @return bool
|
|
|
2455 |
*/
|
|
|
2456 |
function debugging($message = '', $level = DEBUG_NORMAL, $backtrace = null) {
|
|
|
2457 |
global $CFG, $USER;
|
|
|
2458 |
|
|
|
2459 |
$forcedebug = false;
|
|
|
2460 |
if (!empty($CFG->debugusers) && $USER) {
|
|
|
2461 |
$debugusers = explode(',', $CFG->debugusers);
|
|
|
2462 |
$forcedebug = in_array($USER->id, $debugusers);
|
|
|
2463 |
}
|
|
|
2464 |
|
|
|
2465 |
if (!$forcedebug and (empty($CFG->debug) || ($CFG->debug != -1 and $CFG->debug < $level))) {
|
|
|
2466 |
return false;
|
|
|
2467 |
}
|
|
|
2468 |
|
|
|
2469 |
if (!isset($CFG->debugdisplay)) {
|
|
|
2470 |
$CFG->debugdisplay = ini_get_bool('display_errors');
|
|
|
2471 |
}
|
|
|
2472 |
|
|
|
2473 |
if ($message) {
|
|
|
2474 |
if (!$backtrace) {
|
|
|
2475 |
$backtrace = debug_backtrace();
|
|
|
2476 |
}
|
|
|
2477 |
$from = format_backtrace($backtrace, CLI_SCRIPT || NO_DEBUG_DISPLAY);
|
|
|
2478 |
if (PHPUNIT_TEST) {
|
|
|
2479 |
if (phpunit_util::debugging_triggered($message, $level, $from)) {
|
|
|
2480 |
// We are inside test, the debug message was logged.
|
|
|
2481 |
return true;
|
|
|
2482 |
}
|
|
|
2483 |
}
|
|
|
2484 |
|
|
|
2485 |
if (NO_DEBUG_DISPLAY) {
|
|
|
2486 |
// Script does not want any errors or debugging in output,
|
|
|
2487 |
// we send the info to error log instead.
|
|
|
2488 |
error_log('Debugging: ' . $message . ' in '. PHP_EOL . $from);
|
|
|
2489 |
} else if ($forcedebug or $CFG->debugdisplay) {
|
|
|
2490 |
if (!defined('DEBUGGING_PRINTED')) {
|
|
|
2491 |
define('DEBUGGING_PRINTED', 1); // Indicates we have printed something.
|
|
|
2492 |
}
|
|
|
2493 |
|
|
|
2494 |
if (CLI_SCRIPT) {
|
|
|
2495 |
echo "++ $message ++\n$from";
|
|
|
2496 |
} else {
|
|
|
2497 |
if (property_exists($CFG, 'debug_developer_debugging_as_error')) {
|
|
|
2498 |
$showaserror = $CFG->debug_developer_debugging_as_error;
|
|
|
2499 |
} else {
|
|
|
2500 |
$showaserror = (bool) get_whoops();
|
|
|
2501 |
}
|
|
|
2502 |
|
|
|
2503 |
if ($showaserror) {
|
|
|
2504 |
trigger_error($message, E_USER_NOTICE);
|
|
|
2505 |
} else {
|
|
|
2506 |
echo '<div class="notifytiny debuggingmessage" data-rel="debugging">', $message, $from, '</div>';
|
|
|
2507 |
}
|
|
|
2508 |
}
|
|
|
2509 |
} else {
|
|
|
2510 |
trigger_error($message . $from, E_USER_NOTICE);
|
|
|
2511 |
}
|
|
|
2512 |
}
|
|
|
2513 |
return true;
|
|
|
2514 |
}
|
|
|
2515 |
|
|
|
2516 |
/**
|
|
|
2517 |
* Outputs a HTML comment to the browser.
|
|
|
2518 |
*
|
|
|
2519 |
* This is used for those hard-to-debug pages that use bits from many different files in very confusing ways (e.g. blocks).
|
|
|
2520 |
*
|
|
|
2521 |
* <code>print_location_comment(__FILE__, __LINE__);</code>
|
|
|
2522 |
*
|
|
|
2523 |
* @param string $file
|
|
|
2524 |
* @param integer $line
|
|
|
2525 |
* @param boolean $return Whether to return or print the comment
|
|
|
2526 |
* @return string|void Void unless true given as third parameter
|
|
|
2527 |
*/
|
|
|
2528 |
function print_location_comment($file, $line, $return = false) {
|
|
|
2529 |
if ($return) {
|
|
|
2530 |
return "<!-- $file at line $line -->\n";
|
|
|
2531 |
} else {
|
|
|
2532 |
echo "<!-- $file at line $line -->\n";
|
|
|
2533 |
}
|
|
|
2534 |
}
|
|
|
2535 |
|
|
|
2536 |
|
|
|
2537 |
/**
|
|
|
2538 |
* Returns true if the user is using a right-to-left language.
|
|
|
2539 |
*
|
|
|
2540 |
* @return boolean true if the current language is right-to-left (Hebrew, Arabic etc)
|
|
|
2541 |
*/
|
|
|
2542 |
function right_to_left() {
|
|
|
2543 |
return (get_string('thisdirection', 'langconfig') === 'rtl');
|
|
|
2544 |
}
|
|
|
2545 |
|
|
|
2546 |
|
|
|
2547 |
/**
|
|
|
2548 |
* Returns swapped left<=> right if in RTL environment.
|
|
|
2549 |
*
|
|
|
2550 |
* Part of RTL Moodles support.
|
|
|
2551 |
*
|
|
|
2552 |
* @param string $align align to check
|
|
|
2553 |
* @return string
|
|
|
2554 |
*/
|
|
|
2555 |
function fix_align_rtl($align) {
|
|
|
2556 |
if (!right_to_left()) {
|
|
|
2557 |
return $align;
|
|
|
2558 |
}
|
|
|
2559 |
if ($align == 'left') {
|
|
|
2560 |
return 'right';
|
|
|
2561 |
}
|
|
|
2562 |
if ($align == 'right') {
|
|
|
2563 |
return 'left';
|
|
|
2564 |
}
|
|
|
2565 |
return $align;
|
|
|
2566 |
}
|
|
|
2567 |
|
|
|
2568 |
|
|
|
2569 |
/**
|
|
|
2570 |
* Returns true if the page is displayed in a popup window.
|
|
|
2571 |
*
|
|
|
2572 |
* Gets the information from the URL parameter inpopup.
|
|
|
2573 |
*
|
|
|
2574 |
* @todo Use a central function to create the popup calls all over Moodle and
|
|
|
2575 |
* In the moment only works with resources and probably questions.
|
|
|
2576 |
*
|
|
|
2577 |
* @return boolean
|
|
|
2578 |
*/
|
|
|
2579 |
function is_in_popup() {
|
|
|
2580 |
$inpopup = optional_param('inpopup', '', PARAM_BOOL);
|
|
|
2581 |
|
|
|
2582 |
return ($inpopup);
|
|
|
2583 |
}
|
|
|
2584 |
|
|
|
2585 |
/**
|
|
|
2586 |
* Returns a localized sentence in the current language summarizing the current password policy
|
|
|
2587 |
*
|
|
|
2588 |
* @todo this should be handled by a function/method in the language pack library once we have a support for it
|
|
|
2589 |
* @uses $CFG
|
|
|
2590 |
* @return string
|
|
|
2591 |
*/
|
|
|
2592 |
function print_password_policy() {
|
|
|
2593 |
global $CFG;
|
|
|
2594 |
|
|
|
2595 |
$message = '';
|
|
|
2596 |
if (!empty($CFG->passwordpolicy)) {
|
|
|
2597 |
$messages = array();
|
|
|
2598 |
if (!empty($CFG->minpasswordlength)) {
|
|
|
2599 |
$messages[] = get_string('informminpasswordlength', 'auth', $CFG->minpasswordlength);
|
|
|
2600 |
}
|
|
|
2601 |
if (!empty($CFG->minpassworddigits)) {
|
|
|
2602 |
$messages[] = get_string('informminpassworddigits', 'auth', $CFG->minpassworddigits);
|
|
|
2603 |
}
|
|
|
2604 |
if (!empty($CFG->minpasswordlower)) {
|
|
|
2605 |
$messages[] = get_string('informminpasswordlower', 'auth', $CFG->minpasswordlower);
|
|
|
2606 |
}
|
|
|
2607 |
if (!empty($CFG->minpasswordupper)) {
|
|
|
2608 |
$messages[] = get_string('informminpasswordupper', 'auth', $CFG->minpasswordupper);
|
|
|
2609 |
}
|
|
|
2610 |
if (!empty($CFG->minpasswordnonalphanum)) {
|
|
|
2611 |
$messages[] = get_string('informminpasswordnonalphanum', 'auth', $CFG->minpasswordnonalphanum);
|
|
|
2612 |
}
|
|
|
2613 |
|
|
|
2614 |
// Fire any additional password policy functions from plugins.
|
|
|
2615 |
// Callbacks must return an array of message strings.
|
|
|
2616 |
$pluginsfunction = get_plugins_with_function('print_password_policy');
|
|
|
2617 |
foreach ($pluginsfunction as $plugintype => $plugins) {
|
|
|
2618 |
foreach ($plugins as $pluginfunction) {
|
|
|
2619 |
$messages = array_merge($messages, $pluginfunction());
|
|
|
2620 |
}
|
|
|
2621 |
}
|
|
|
2622 |
|
|
|
2623 |
$messages = join(', ', $messages); // This is ugly but we do not have anything better yet...
|
|
|
2624 |
// Check if messages is empty before outputting any text.
|
|
|
2625 |
if ($messages != '') {
|
|
|
2626 |
$message = get_string('informpasswordpolicy', 'auth', $messages);
|
|
|
2627 |
}
|
|
|
2628 |
}
|
|
|
2629 |
return $message;
|
|
|
2630 |
}
|
|
|
2631 |
|
|
|
2632 |
/**
|
|
|
2633 |
* Get the value of a help string fully prepared for display in the current language.
|
|
|
2634 |
*
|
|
|
2635 |
* @param string $identifier The identifier of the string to search for.
|
|
|
2636 |
* @param string $component The module the string is associated with.
|
|
|
2637 |
* @param boolean $ajax Whether this help is called from an AJAX script.
|
|
|
2638 |
* This is used to influence text formatting and determines
|
|
|
2639 |
* which format to output the doclink in.
|
|
|
2640 |
* @param string|object|array $a An object, string or number that can be used
|
|
|
2641 |
* within translation strings
|
|
|
2642 |
* @return stdClass An object containing:
|
|
|
2643 |
* - heading: Any heading that there may be for this help string.
|
|
|
2644 |
* - text: The wiki-formatted help string.
|
|
|
2645 |
* - doclink: An object containing a link, the linktext, and any additional
|
|
|
2646 |
* CSS classes to apply to that link. Only present if $ajax = false.
|
|
|
2647 |
* - completedoclink: A text representation of the doclink. Only present if $ajax = true.
|
|
|
2648 |
*/
|
|
|
2649 |
function get_formatted_help_string($identifier, $component, $ajax = false, $a = null) {
|
|
|
2650 |
global $CFG, $OUTPUT;
|
|
|
2651 |
$sm = get_string_manager();
|
|
|
2652 |
|
|
|
2653 |
// Do not rebuild caches here!
|
|
|
2654 |
// Devs need to learn to purge all caches after any change or disable $CFG->langstringcache.
|
|
|
2655 |
|
|
|
2656 |
$data = new stdClass();
|
|
|
2657 |
|
|
|
2658 |
if ($sm->string_exists($identifier, $component)) {
|
|
|
2659 |
$data->heading = format_string(get_string($identifier, $component));
|
|
|
2660 |
} else {
|
|
|
2661 |
// Gracefully fall back to an empty string.
|
|
|
2662 |
$data->heading = '';
|
|
|
2663 |
}
|
|
|
2664 |
|
|
|
2665 |
if ($sm->string_exists($identifier . '_help', $component)) {
|
|
|
2666 |
$options = new stdClass();
|
|
|
2667 |
$options->trusted = false;
|
|
|
2668 |
$options->noclean = false;
|
|
|
2669 |
$options->filter = false;
|
|
|
2670 |
$options->para = true;
|
|
|
2671 |
$options->newlines = false;
|
|
|
2672 |
$options->overflowdiv = !$ajax;
|
|
|
2673 |
|
|
|
2674 |
// Should be simple wiki only MDL-21695.
|
|
|
2675 |
$data->text = format_text(get_string($identifier.'_help', $component, $a), FORMAT_MARKDOWN, $options);
|
|
|
2676 |
|
|
|
2677 |
$helplink = $identifier . '_link';
|
|
|
2678 |
if ($sm->string_exists($helplink, $component)) { // Link to further info in Moodle docs.
|
| 1441 |
ariadna |
2679 |
// The link is stored in a language file but should not be translated, use value for English.
|
|
|
2680 |
$link = $sm->get_string($helplink, $component, null, 'en');
|
|
|
2681 |
// The text 'More help' should be in the current language.
|
| 1 |
efrain |
2682 |
$linktext = get_string('morehelp');
|
|
|
2683 |
|
|
|
2684 |
$data->doclink = new stdClass();
|
|
|
2685 |
$url = new moodle_url(get_docs_url($link));
|
|
|
2686 |
if ($ajax) {
|
|
|
2687 |
$data->doclink->link = $url->out();
|
|
|
2688 |
$data->doclink->linktext = $linktext;
|
|
|
2689 |
$data->doclink->class = ($CFG->doctonewwindow) ? 'helplinkpopup' : '';
|
|
|
2690 |
} else {
|
|
|
2691 |
$data->completedoclink = html_writer::tag('div', $OUTPUT->doc_link($link, $linktext),
|
|
|
2692 |
array('class' => 'helpdoclink'));
|
|
|
2693 |
}
|
|
|
2694 |
}
|
|
|
2695 |
} else {
|
|
|
2696 |
$data->text = html_writer::tag('p',
|
|
|
2697 |
html_writer::tag('strong', 'TODO') . ": missing help string [{$identifier}_help, {$component}]");
|
|
|
2698 |
}
|
|
|
2699 |
return $data;
|
|
|
2700 |
}
|