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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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* Configurable Reports
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* A Moodle block for creating customizable reports
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* @package blocks
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* @author: Juan leyva <http://www.twitter.com/jleyvadelgado>
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* @date: 2009
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*/
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/**
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* COHORT FILTER
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* A filter for configurable reports
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* @author: François Parlant <https://www.linkedin.com/in/francois-parlant/>
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* @date: 2020
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*/
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/* example of report query
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***********
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* Display the students from a cohort and all the courses they are enrolled in
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***********
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SELECT
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u.firstname AS Firstname,
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u.lastname AS Lastname,
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u.email AS Email,
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c.fullname AS Course
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FROM prefix_course AS c
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JOIN prefix_enrol AS en ON en.courseid = c.id
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JOIN prefix_user_enrolments AS ue ON ue.enrolid = en.id
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JOIN prefix_user AS u ON ue.userid = u.id
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WHERE u.id in (SELECT u.id
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FROM prefix_cohort AS h
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JOIN prefix_cohort_members AS hm ON h.id = hm.cohortid
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JOIN prefix_user AS u ON hm.userid = u.id
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WHERE 1=1
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%%FILTER_COHORTS:h.id%%
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ORDER BY u.firstname)
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*/
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require_once($CFG->dirroot.'/blocks/configurable_reports/plugin.class.php');
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class plugin_cohorts extends plugin_base{
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public function init() {
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$this->form = false;
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$this->unique = true;
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$this->fullname = get_string('filtercohorts', 'block_configurable_reports');
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$this->reporttypes = array('courses', 'sql');
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}
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public function summary($data) {
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return get_string('filtercohorts_summary', 'block_configurable_reports');
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}
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public function execute($finalelements, $data) {
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$filtercohorts = optional_param('filter_cohorts', 0, PARAM_INT);
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if (!$filtercohorts) {
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return $finalelements;
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}
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if ($this->report->type != 'sql') {
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return array($filtercohorts);
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} else {
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if (preg_match("/%%FILTER_COHORTS:([^%]+)%%/i", $finalelements, $output)) {
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$replace = ' AND '.$output[1].' = '.$filtercohorts;
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return str_replace('%%FILTER_COHORTS:'.$output[1].'%%', $replace, $finalelements);
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}
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}
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return $finalelements;
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}
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public function print_filter(&$mform) {
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global $remotedb, $COURSE, $PAGE, $CFG;
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$reportclassname = 'report_'.$this->report->type;
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$reportclass = new $reportclassname($this->report);
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if ($this->report->type != 'sql') {
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$components = cr_unserialize($this->report->components);
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$conditions = $components['conditions'];
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$cohortslist = $reportclass->elements_by_conditions($conditions);
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} else {
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$sql = 'SELECT h.id, h.name
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FROM {cohort} h
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';
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$studentlist = $remotedb->get_records_sql($sql);
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foreach ($studentlist as $student) {
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$cohortslist[] = $student->userid;
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}
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}
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$cohortsoptions = array();
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$cohortsoptions[0] = get_string('filter_all', 'block_configurable_reports');
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if (!empty($cohortslist)) {
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$cohorts = $remotedb->get_records_sql($sql);
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foreach ($cohorts as $c) {
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$cohortsoptions[$c->id] = $c->name;
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}
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}
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$elestr = get_string('cohorts', 'block_configurable_reports');
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$mform->addElement('select', 'filter_cohorts', $elestr, $cohortsoptions);
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$mform->setType('filter_cohorts', PARAM_INT);
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}
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}
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