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<?php
// This file is part of 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/>.
/**
* Helper class for gradehistory report.
*
* @package gradereport_history
* @copyright 2014 onwards Ankit Agarwal <ankit.agrr@gmail.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace gradereport_history;
defined('MOODLE_INTERNAL') || die;
/**
* Helper class for gradehistory report.
*
* @since Moodle 2.8
* @package gradereport_history
* @copyright 2014 onwards Ankit Agarwal <ankit.agrr@gmail.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class helper {
/**
* Initialise the js to handle the user selection {@link gradereport_history_user_button}.
*
* @param int $courseid course id.
* @param array $currentusers List of currently selected users.
*
* @return output\user_button the user select button.
*/
public static function init_js($courseid, array $currentusers = null) {
global $PAGE;
// Load the strings for js.
$PAGE->requires->strings_for_js(array(
'errajaxsearch',
'finishselectingusers',
'foundoneuser',
'foundnusers',
'loadmoreusers',
'selectusers',
), 'gradereport_history');
$PAGE->requires->strings_for_js(array(
'loading'
), 'admin');
$PAGE->requires->strings_for_js(array(
'noresults',
'search'
), 'moodle');
$arguments = array(
'courseid' => $courseid,
'ajaxurl' => '/grade/report/history/users_ajax.php',
'url' => $PAGE->url->out(false),
'selectedUsers' => $currentusers,
);
// Load the yui module.
$PAGE->requires->yui_module(
'moodle-gradereport_history-userselector',
'Y.M.gradereport_history.UserSelector.init',
array($arguments)
);
}
/**
* Retrieve a list of users.
*
* We're interested in anyone that had a grade history in this course. This api returns a list of such users based on various
* criteria passed.
*
* @param \context $context Context of the page where the results would be shown.
* @param string $search the text to search for (empty string = find all).
* @param int $page page number, defaults to 0.
* @param int $perpage Number of entries to display per page, defaults to 0.
*
* @return array list of users.
*/
public static function get_users($context, $search = '', $page = 0, $perpage = 25) {
global $DB;
list($sql, $params) = self::get_users_sql_and_params($context, $search);
$limitfrom = $page * $perpage;
$limitto = $limitfrom + $perpage;
$users = $DB->get_records_sql($sql, $params, $limitfrom, $limitto);
return $users;
}
/**
* Get total number of users present for the given search criteria.
*
* @param \context $context Context of the page where the results would be shown.
* @param string $search the text to search for (empty string = find all).
*
* @return int number of users found.
*/
public static function get_users_count($context, $search = '') {
global $DB;
list($sql, $params) = self::get_users_sql_and_params($context, $search, true);
return $DB->count_records_sql($sql, $params);
}
/**
* Get sql and params to use to get list of users.
*
* @param \context $context Context of the page where the results would be shown.
* @param string $search the text to search for (empty string = find all).
* @param bool $count setting this to true, returns an sql to get count only instead of the complete data records.
*
* @return array sql and params list
*/
protected static function get_users_sql_and_params($context, $search = '', $count = false) {
global $DB, $USER;
// Fields we need from the user table.
$extrafields = get_extra_user_fields($context);
$params = array();
if (!empty($search)) {
list($filtersql, $params) = users_search_sql($search, 'u', true, $extrafields);
$filtersql .= ' AND ';
} else {
$filtersql = '';
}
$ufields = \user_picture::fields('u', $extrafields).',u.username';
if ($count) {
$select = "SELECT COUNT(DISTINCT u.id) ";
$orderby = "";
} else {
$select = "SELECT DISTINCT $ufields ";
$orderby = " ORDER BY u.lastname ASC, u.firstname ASC";
}
$groupjoinsql = '';
$groupwheresql = '';
$courseid = $context->instanceid;
$groupmode = groups_get_course_groupmode(get_course($courseid));
// We're only interested in separate groups mode because it's the only group mode that requires the user to be a member of
// specific group(s), except when they have the 'moodle/site:accessallgroups' capability.
if ($groupmode == SEPARATEGROUPS && !has_capability('moodle/site:accessallgroups', $context)) {
// Fetch the groups that the user can see.
$groups = groups_get_all_groups($courseid, $USER->id, 0, 'g.id');
// Add join condition to include users that only belong to the same group as the user.
list($insql, $inparams) = $DB->get_in_or_equal(array_keys($groups), SQL_PARAMS_NAMED, 'gid', true, 0);
$groupjoinsql = " JOIN {groups_members} gm ON gm.userid = u.id ";
$groupwheresql = " AND gm.groupid $insql ";
$params = array_merge($params, $inparams);
}
$sql = "$select
FROM {user} u
JOIN {grade_grades_history} ggh ON u.id = ggh.userid
JOIN {grade_items} gi ON gi.id = ggh.itemid
$groupjoinsql
WHERE $filtersql gi.courseid = :courseid $groupwheresql";
$sql .= $orderby;
$params['courseid'] = $courseid;
return array($sql, $params);
}
/**
* Get a list of graders.
*
* @param int $courseid Id of course for which we need to fetch graders.
*
* @return array list of graders.
*/
public static function get_graders($courseid) {
global $DB, $USER;
$groupjoinsql = $groupwheresql = '';
$inparams = [];
$groupmode = groups_get_course_groupmode(get_course($courseid));
if ($groupmode == SEPARATEGROUPS && !has_capability('moodle/site:accessallgroups', \context_course::instance($courseid))) {
// Fetch the groups that the user can see.
$groups = groups_get_all_groups($courseid, $USER->id, 0, 'g.id');
// Add join condition to include users that only belong to the same group as the user.
list($insql, $inparams) = $DB->get_in_or_equal(array_keys($groups), SQL_PARAMS_NAMED, 'gid', true, 0);
$groupjoinsql = " JOIN {groups_members} gm ON gm.userid = u.id ";
$groupwheresql = " AND gm.groupid $insql ";
}
$ufields = get_all_user_name_fields(true, 'u');
$sql = "SELECT u.id, $ufields
FROM {user} u
JOIN {grade_grades_history} ggh ON ggh.usermodified = u.id
JOIN {grade_items} gi ON gi.id = ggh.itemid
$groupjoinsql
WHERE gi.courseid = :courseid $groupwheresql
GROUP BY u.id, $ufields
ORDER BY u.lastname ASC, u.firstname ASC";
$graders = $DB->get_records_sql($sql, array('courseid' => $courseid) + $inparams);
$return = array(0 => get_string('allgraders', 'gradereport_history'));
foreach ($graders as $grader) {
$return[$grader->id] = fullname($grader);
}
return $return;
}
}