Antonio Carlos Mariani
9 years ago
5 changed files with 307 additions and 90 deletions
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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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* Class that computes summary of users points |
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* |
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* @package mod_attendance |
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* @copyright 2016 Antonio Carlos Mariani http://antonio.c.mariani@gmail.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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class mod_attendance_summary { |
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/** @var int attendance instance identifier */ |
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private $attendanceid; |
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/** @var stdclass course course data*/ |
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private $course; |
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/** @var int groupmode*/ |
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private $groupmode; |
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/** @var array userspoints (userid, numtakensessions, points, maxpoints) */ |
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private $userspoints; |
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/** @var array pointsbygroup (groupid, numsessions, maxpoints) */ |
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private $maxpointsbygroupsessions; |
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/** |
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* Initializes the class |
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* |
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* @param int attendance instance identifier |
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* @param array userids user instances identifier |
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* @param int $startdate Attendance sessions startdate |
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* @param int $enddate Attendance sessions enddate |
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*/ |
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public function __construct($attendanceid, $userids=array(), $startdate = '', $enddate = '') { |
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$this->attendanceid = $attendanceid; |
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$this->compute_users_points($userids, $startdate, $enddate); |
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} |
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/** |
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* Returns true if the user has some session with points |
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* |
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* @param int userid User instance id |
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* |
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* @return boolean |
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*/ |
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public function has_taken_sessions($userid) { |
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return isset($this->userspoints[$userid]); |
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} |
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/** |
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* Returns true if the corresponding attendance instance is currently configure to work with grades (points) |
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* |
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* @return boolean |
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*/ |
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public function with_groups() { |
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return $this->groupmode > 0; |
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} |
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/** |
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* Returns the groupmode of the corresponding attendance instance |
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* |
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* @return int |
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*/ |
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public function get_groupmode() { |
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return $this->groupmode; |
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} |
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/** |
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* Returns a summary of the points assigned to the user related to the taken sessions |
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* |
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* @param int userid User instance id |
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* |
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* @return array |
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*/ |
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public function get_taken_sessions_summary_for($userid) { |
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$usersummary = new stdClass(); |
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if ($this->has_taken_sessions($userid)) { |
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$usersummary->numtakensessions = $this->userspoints[$userid]->numtakensessions; |
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$usersummary->takensessionspoints = $this->userspoints[$userid]->points; |
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$usersummary->takensessionsmaxpoints = $this->userspoints[$userid]->maxpoints; |
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} else { |
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$usersummary->numtakensessions = 0; |
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$usersummary->takensessionspoints = 0; |
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$usersummary->takensessionsmaxpoints = 0; |
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} |
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$usersummary->takensessionspercentage = attendance_calc_fraction($usersummary->takensessionspoints, $usersummary->takensessionsmaxpoints); |
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return $usersummary; |
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} |
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/** |
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* Returns a summary of the points assigned to the user, both related to taken sessions and related to all sessions |
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* |
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* @param int userid User instance id |
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* |
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* @return array |
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*/ |
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public function get_all_sessions_summary_for($userid) { |
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$usersummary = $this->get_taken_sessions_summary_for($userid); |
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if (!isset($this->maxpointsbygroupsessions)) { |
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$this->compute_maxpoints_by_group_session(); |
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} |
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$usersummary->numallsessions = $this->maxpointsbygroupsessions[0]->numsessions; |
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$usersummary->allsessionsmaxpoints = $this->maxpointsbygroupsessions[0]->maxpoints; |
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if ($this->with_groups()) { |
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$groupids = array_keys(groups_get_all_groups($this->course->id, $userid)); |
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foreach ($groupids as $gid) { |
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if (isset($this->maxpointsbygroupsessions[$gid])) { |
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$usersummary->numallsessions += $this->maxpointsbygroupsessions[$gid]->numsessions; |
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$usersummary->allsessionsmaxpoints += $this->maxpointsbygroupsessions[$gid]->maxpoints; |
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} |
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} |
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} |
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$usersummary->allsessionspercentage = attendance_calc_fraction($usersummary->takensessionspoints, $usersummary->allsessionsmaxpoints); |
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$deltapoints = $usersummary->allsessionsmaxpoints - $usersummary->takensessionsmaxpoints; |
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$usersummary->maxpossiblepoints = $usersummary->takensessionspoints + $deltapoints; |
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$usersummary->maxpossiblepercentage = attendance_calc_fraction($usersummary->maxpossiblepoints, $usersummary->allsessionsmaxpoints); |
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return $usersummary; |
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} |
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/** |
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* Computes the summary of points for the users that have some taken session |
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* |
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* @param array userids user instances identifier |
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* @param int $startdate Attendance sessions startdate |
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* @param int $enddate Attendance sessions enddate |
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* @return (userid, numtakensessions, points, maxpoints) |
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*/ |
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private function compute_users_points($userids=array(), $startdate = '', $enddate = '') { |
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global $DB; |
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list($this->course, $cm) = get_course_and_cm_from_instance($this->attendanceid, 'attendance'); |
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$this->groupmode = $cm->effectivegroupmode; |
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$params = array( |
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'attid' => $this->attendanceid, |
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'attid2' => $this->attendanceid, |
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'cstartdate' => $this->course->startdate, |
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); |
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$where = ''; |
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if (!empty($userids)) { |
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list($insql, $inparams) = $DB->get_in_or_equal($userids, SQL_PARAMS_NAMED); |
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$where .= ' AND atl.studentid ' . $insql; |
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$params = array_merge($params, $inparams); |
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} |
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if (!empty($startdate)) { |
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$where .= ' AND ats.sessdate >= :startdate'; |
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$params['startdate'] = $startdate; |
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} |
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if (!empty($enddate)) { |
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$where .= ' AND ats.sessdate < :enddate '; |
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$params['enddate'] = $enddate; |
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} |
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$joingroup = ''; |
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if ($this->with_groups()) { |
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$joingroup = 'LEFT JOIN {groups_members} gm ON (gm.userid = atl.studentid AND gm.groupid = ats.groupid)'; |
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$where .= ' AND (ats.groupid = 0 or gm.id is NOT NULL)'; |
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} else { |
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$where .= ' AND ats.groupid = 0'; |
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} |
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$sql = "SELECT userid, COUNT(*) AS numtakensessions, SUM(grade) AS points, SUM(maxgrade) AS maxpoints |
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FROM (SELECT atl.studentid AS userid, ats.id AS sessionid, stg.grade, stm.maxgrade |
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FROM {attendance_sessions} ats |
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JOIN {attendance_log} atl ON (atl.sessionid = ats.id) |
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JOIN {attendance_statuses} stg ON (stg.id = atl.statusid AND stg.deleted = 0 AND stg.visible = 1) |
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JOIN (SELECT setnumber, MAX(grade) AS maxgrade |
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FROM {attendance_statuses} |
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WHERE attendanceid = :attid2 |
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AND deleted = 0 |
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AND visible = 1 |
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GROUP BY setnumber) stm |
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ON (stm.setnumber = ats.statusset) |
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{$joingroup} |
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WHERE ats.attendanceid = :attid |
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AND ats.sessdate >= :cstartdate |
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AND ats.lasttakenby != 0 |
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{$where} |
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) sess |
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GROUP BY userid"; |
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$this->userspoints = $DB->get_records_sql($sql, $params); |
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} |
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/** |
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* Computes and store the maximum points possible for each group session |
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* |
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* @return null |
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*/ |
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private function compute_maxpoints_by_group_session() { |
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global $DB; |
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$params = array( |
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'attid' => $this->attendanceid, |
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'attid2' => $this->attendanceid, |
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'cstartdate' => $this->course->startdate, |
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); |
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$where = ''; |
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if (!$this->with_groups()) { |
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$where = 'AND sess.groupid = 0'; |
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} |
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$sql = "SELECT sess.groupid, COUNT(*) AS numsessions, SUM(stamax.maxgrade) AS maxpoints |
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FROM {attendance_sessions} sess |
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JOIN (SELECT setnumber, MAX(grade) AS maxgrade |
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FROM {attendance_statuses} |
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WHERE attendanceid = :attid2 |
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AND deleted = 0 |
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AND visible = 1 |
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GROUP BY setnumber) stamax |
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ON (stamax.setnumber = sess.statusset) |
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WHERE sess.attendanceid = :attid |
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AND sess.sessdate >= :cstartdate |
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{$where} |
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GROUP BY sess.groupid"; |
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$this->maxpointsbygroupsessions = $DB->get_records_sql($sql, $params); |
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if (!isset($this->maxpointsbygroupsessions[0])) { |
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$gpoints = new stdClass(); |
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$gpoints->numsessions = 0; |
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$gpoints->maxpoints = 0; |
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$this->maxpointsbygroupsessions[0] = $gpoints; |
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} |
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} |
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} |
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