help.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * Displays help via AJAX call or in a new page
  20  *
  21  * Use {@link core_renderer::help_icon()} or {@link addHelpButton()} to display
  22  * the help icon.
  23  *
  24  * @copyright 2002 onwards Martin Dougiamas
  25  * @package   core
  26  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  27  */
  28
  29 define('NO_MOODLE_COOKIES', true);
  30
  31 require_once(dirname(__FILE__) . '/config.php');
  32
  33 $identifier = required_param('identifier', PARAM_STRINGID);
  34 $component  = required_param('component', PARAM_COMPONENT);
  35 $lang       = required_param('lang', PARAM_LANG); // TODO: maybe split into separate scripts
  36 $ajax       = optional_param('ajax', 0, PARAM_BOOL);
  37
  38 if (!$lang) {
  39     $lang = 'en';
  40 }
  41 $SESSION->lang = $lang; // does not actually modify session because we do not use cookies here
  42
  43 $sm = get_string_manager();
  44
  45 $PAGE->set_url('/help.php');
  46 $PAGE->set_pagelayout('popup');
  47 $PAGE->set_context(context_system::instance());
  48
  49 if ($ajax) {
  50     @header('Content-Type: text/plain; charset=utf-8');
  51 } else {
  52     echo $OUTPUT->header();
  53 }
  54
  55 if (!$sm->string_exists($identifier.'_help', $component)) {
  56     // strings on-diskc cache may be dirty - try to rebuild it and check again
  57     $sm->load_component_strings($component, current_language(), true);
  58 }
  59
  60 if ($sm->string_exists($identifier.'_help', $component)) {
  61     $options = new stdClass();
  62     $options->trusted = false;
  63     $options->noclean = false;
  64     $options->smiley = false;
  65     $options->filter = false;
  66     $options->para = true;
  67     $options->newlines = false;
  68     $options->overflowdiv = !$ajax;
  69
  70     echo $OUTPUT->heading(format_string(get_string($identifier, $component)), 1, 'helpheading');
  71     // Should be simple wiki only MDL-21695
  72     echo format_text(get_string($identifier.'_help', $component), FORMAT_MARKDOWN, $options);
  73
  74     if ($sm->string_exists($identifier.'_link', $component)) {  // Link to further info in Moodle docs
  75         $link = get_string($identifier.'_link', $component);
  76         $linktext = get_string('morehelp');
  77         echo '<div class="helpdoclink">'.$OUTPUT->doc_link($link, $linktext).'</div>';
  78     }
  79
  80 } else {
  81     echo "<p><strong>TODO</strong>: missing help string [{$identifier}_help, $component]</p>";
  82 }
  83
  84 if (!$ajax) {
  85     echo $OUTPUT->footer();
  86 }