moodle-mod_htmlcert/lib.php

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<?php
// This file is part of the customcert module for Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Customcert module core interaction API
*
* @package mod_customcert
* @copyright 2013 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
/**
* Add customcert instance.
*
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* @param stdClass $data
* @param mod_customcert_mod_form $mform
* @return int new customcert instance id
*/
function customcert_add_instance($data, $mform) {
global $DB;
$data->protection = customcert_set_protection($data);
$data->timecreated = time();
$data->timemodified = $data->timecreated;
$data->id = $DB->insert_record('customcert', $data);
// Add a page to this customcert.
customcert_add_page($data);
return $data->id;
}
/**
* Update customcert instance.
*
* @param stdClass $data
* @param mod_customcert_mod_form $mform
* @return bool true
*/
function customcert_update_instance($data, $mform) {
global $DB;
$data->protection = customcert_set_protection($data);
$data->timemodified = time();
$data->id = $data->instance;
return $DB->update_record('customcert', $data);
}
/**
* Given an ID of an instance of this module,
* this function will permanently delete the instance
* and any data that depends on it.
*
* @param int $id
* @return bool true if successful
*/
function customcert_delete_instance($id) {
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global $CFG, $DB;
// Ensure the customcert exists.
if (!$DB->get_record('customcert', array('id' => $id))) {
return false;
}
// Get the course module as it is used when deleting files.
if (!$cm = get_coursemodule_from_instance('customcert', $id)) {
return false;
}
// Delete the customcert instance.
if (!$DB->delete_records('customcert', array('id' => $id))) {
return false;
}
// Delete the elements.
$sql = "SELECT e.*
FROM {customcert_elements} e
INNER JOIN {customcert_pages} p
ON e.pageid = p.id
WHERE p.customcertid = :customcertid";
if ($elements = $DB->get_records_sql($sql, array('customcertid' => $id))) {
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require_once($CFG->dirroot . '/mod/customcert/locallib.php');
foreach ($elements as $element) {
// Get an instance of the element class.
if ($e = customcert_get_element_instance($element)) {
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$e->delete_element();
} else {
// The plugin files are missing, so just remove the entry from the DB.
$DB->delete_records('customcert_elements', array('id' => $element->id));
}
}
}
// Delete the pages.
if (!$DB->delete_records('customcert_pages', array('customcertid' => $id))) {
return false;
}
// Delete the customcert issues.
if (!$DB->delete_records('customcert_issues', array('customcertid' => $id))) {
return false;
}
// Delete any files associated with the customcert.
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$context = context_module::instance($cm->id);
$fs = get_file_storage();
$fs->delete_area_files($context->id);
return true;
}
/**
* This function is used by the reset_course_userdata function in moodlelib.
* This function will remove all posts from the specified customcert
* and clean up any related data.
*
* @param $data the data submitted from the reset course.
* @return array status array
*/
function customcert_reset_userdata($data) {
global $DB;
$componentstr = get_string('modulenameplural', 'customcert');
$status = array();
if (!empty($data->reset_customcert)) {
$sql = "SELECT cert.id
FROM {customcert} cert
WHERE cert.course = :courseid";
$DB->delete_records_select('customcert_issues', "customcertid IN ($sql)", array('courseid' => $data->courseid));
$status[] = array('component' => $componentstr, 'item' => get_string('customcertremoved', 'customcert'), 'error' => false);
}
// Updating dates - shift may be negative too.
if ($data->timeshift) {
shift_course_mod_dates('customcert', array('timeopen', 'timeclose'), $data->timeshift, $data->courseid);
$status[] = array('component' => $componentstr, 'item' => get_string('datechanged'), 'error' => false);
}
return $status;
}
/**
* Implementation of the function for printing the form elements that control
* whether the course reset functionality affects the customcert.
*
* @param mod_customcert_mod_form $mform form passed by reference
*/
function customcert_reset_course_form_definition(&$mform) {
$mform->addElement('header', 'customcertheader', get_string('modulenameplural', 'customcert'));
$mform->addElement('advcheckbox', 'reset_customcert', get_string('deletissuedcustomcerts', 'customcert'));
}
/**
* Course reset form defaults.
*
* @param stdClass $course
* @return array
*/
function customcert_reset_course_form_defaults($course) {
return array('reset_customcert' => 1);
}
/**
* Returns information about received customcert.
* Used for user activity reports.
*
* @param stdClass $course
* @param stdClass $user
* @param stdClass $mod
* @param stdClass $customcert
* @return stdClass the user outline object
*/
function customcert_user_outline($course, $user, $mod, $customcert) {
global $DB;
$result = new stdClass();
if ($issue = $DB->get_record('customcert_issues', array('customcertid' => $customcert->id, 'userid' => $user->id))) {
$result->info = get_string('issued', 'customcert');
$result->time = $issue->timecreated;
} else {
$result->info = get_string('notissued', 'customcert');
}
return $result;
}
/**
* Returns information about received customcert.
* Used for user activity reports.
*
* @param stdClass $course
* @param stdClass $user
* @param stdClass $mod
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* @param stdClass $customcert
* @return string the user complete information
*/
function customcert_user_complete($course, $user, $mod, $customcert) {
global $DB, $OUTPUT;
if ($issue = $DB->get_record('customcert_issues', array('customcertid' => $customcert->id, 'userid' => $user->id))) {
echo $OUTPUT->box_start();
echo get_string('issued', 'customcert') . ": ";
echo userdate($issue->timecreated);
customcert_print_user_files($customcert->id, $user->id);
echo '<br />';
echo $OUTPUT->box_end();
} else {
print_string('notissuedyet', 'customcert');
}
}
/**
* Serves certificate issues and other files.
*
* @param stdClass $course
* @param stdClass $cm
* @param context $context
* @param string $filearea
* @param array $args
* @param bool $forcedownload
* @return bool|nothing false if file not found, does not return anything if found - just send the file
*/
function customcert_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload) {
global $CFG;
require_once($CFG->libdir . '/filelib.php');
// We are positioning the elements.
if ($filearea === 'image') {
if ($context->contextlevel == CONTEXT_MODULE) {
require_login($course, false, $cm);
} else if ($context->contextlevel == CONTEXT_SYSTEM && !has_capability('mod/certificate:manage', $context)) {
return false;
}
$relativepath = implode('/', $args);
$fullpath = '/' . $context->id . '/mod_customcert/image/' . $relativepath;
$fs = get_file_storage();
if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
return false;
}
send_stored_file($file, 0, 0, $forcedownload);
}
}
/**
* @uses FEATURE_GROUPS
* @uses FEATURE_GROUPINGS
* @uses FEATURE_GROUPMEMBERSONLY
* @uses FEATURE_MOD_INTRO
* @uses FEATURE_COMPLETION_TRACKS_VIEWS
* @uses FEATURE_GRADE_HAS_GRADE
* @uses FEATURE_GRADE_OUTCOMES
* @param string $feature FEATURE_xx constant for requested feature
* @return mixed True if module supports feature, null if doesn't know
*/
function customcert_supports($feature) {
switch ($feature) {
case FEATURE_GROUPS:
return true;
case FEATURE_GROUPINGS:
return true;
case FEATURE_GROUPMEMBERSONLY:
return true;
case FEATURE_MOD_INTRO:
return true;
case FEATURE_COMPLETION_TRACKS_VIEWS:
return true;
case FEATURE_BACKUP_MOODLE2:
return true;
default:
return null;
}
}
/**
* Used for course participation report (in case customcert is added).
*
* @return array
*/
function customcert_get_view_actions() {
return array('view', 'view all', 'view report');
}
/**
* Used for course participation report (in case customcert is added).
*
* @return array
*/
function customcert_get_post_actions() {
return array('received');
}
/**
* Function to be run periodically according to the moodle cron.
*/
function customcert_cron() {
return true;
}
/**
* This function extends the settings navigation block for the site.
*
* It is safe to rely on PAGE here as we will only ever be within the module
* context when this is called.
*
* @param settings_navigation $settings
* @param navigation_node $customcertnode
*/
function customcert_extend_settings_navigation(settings_navigation $settings, navigation_node $customcertnode) {
global $PAGE;
$keys = $customcertnode->get_children_key_list();
$beforekey = null;
$i = array_search('modedit', $keys);
if ($i === false and array_key_exists(0, $keys)) {
$beforekey = $keys[0];
} else if (array_key_exists($i + 1, $keys)) {
$beforekey = $keys[$i + 1];
}
if (has_capability('mod/customcert:manage', $PAGE->cm->context)) {
$node = navigation_node::create(get_string('editcustomcert', 'customcert'),
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new moodle_url('/mod/customcert/edit.php', array('cmid' => $PAGE->cm->id)),
navigation_node::TYPE_SETTING, null, 'mod_customcert_edit',
new pix_icon('t/edit', ''));
$customcertnode->add_node($node, $beforekey);
}
return $customcertnode->trim_if_empty();
}