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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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 * Cohort related management functions, this file needs to be included manually.
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 *
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 * @package    core_cohort
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 * @copyright  2010 Petr Skoda  {@link http://skodak.org}
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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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require('../config.php');
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require_once($CFG->dirroot.'/course/lib.php');
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require_once($CFG->dirroot.'/cohort/lib.php');
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require_once($CFG->dirroot.'/cohort/edit_form.php');
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$id        = optional_param('id', 0, PARAM_INT);
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$contextid = optional_param('contextid', 0, PARAM_INT);
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$delete    = optional_param('delete', 0, PARAM_BOOL);
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$show      = optional_param('show', 0, PARAM_BOOL);
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$hide      = optional_param('hide', 0, PARAM_BOOL);
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$confirm   = optional_param('confirm', 0, PARAM_BOOL);
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$returnurl = optional_param('returnurl', '', PARAM_LOCALURL);
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require_login();
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$category = null;
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if ($id) {
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    $cohort = $DB->get_record('cohort', array('id'=>$id), '*', MUST_EXIST);
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    $context = context::instance_by_id($cohort->contextid, MUST_EXIST);
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} else {
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    $context = context::instance_by_id($contextid, MUST_EXIST);
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    if ($context->contextlevel != CONTEXT_COURSECAT and $context->contextlevel != CONTEXT_SYSTEM) {
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        throw new \moodle_exception('invalidcontext');
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    }
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    $cohort = new stdClass();
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    $cohort->id          = 0;
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    $cohort->contextid   = $context->id;
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    $cohort->name        = '';
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    $cohort->description = '';
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}
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require_capability('moodle/cohort:manage', $context);
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if ($returnurl) {
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    $returnurl = new moodle_url($returnurl);
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} else {
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    $returnurl = new moodle_url('/cohort/index.php', array('contextid'=>$context->id));
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}
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if (!empty($cohort->component)) {
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    // We can not manually edit cohorts that were created by external systems, sorry.
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    redirect($returnurl);
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}
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$PAGE->set_context($context);
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$baseurl = new moodle_url('/cohort/edit.php', array('contextid' => $context->id, 'id' => $cohort->id));
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$PAGE->set_url($baseurl);
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$PAGE->set_context($context);
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$PAGE->set_pagelayout('admin');
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if ($context->contextlevel == CONTEXT_COURSECAT) {
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    core_course_category::page_setup();
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    // Set the cohorts node active in the settings navigation block.
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    if ($cohortsnode = $PAGE->settingsnav->find('cohort', navigation_node::TYPE_SETTING)) {
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        $cohortsnode->make_active();
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    }
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    $PAGE->set_secondary_active_tab('cohort');
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} else {
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    navigation_node::override_active_url(new moodle_url('/cohort/index.php', array()));
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    $PAGE->set_heading($COURSE->fullname);
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}
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if ($delete and $cohort->id) {
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    $PAGE->url->param('delete', 1);
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    if ($confirm and confirm_sesskey()) {
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        cohort_delete_cohort($cohort);
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        redirect($returnurl);
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    }
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    $strheading = get_string('delcohort', 'cohort');
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    $PAGE->navbar->add($strheading);
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    $PAGE->set_title($strheading);
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    echo $OUTPUT->header();
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    echo $OUTPUT->heading($strheading);
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    $yesurl = new moodle_url('/cohort/edit.php', array('id' => $cohort->id, 'delete' => 1,
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        'confirm' => 1, 'sesskey' => sesskey(), 'returnurl' => $returnurl->out_as_local_url()));
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    $message = get_string('delconfirm', 'cohort', format_string($cohort->name));
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    echo $OUTPUT->confirm($message, $yesurl, $returnurl);
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    echo $OUTPUT->footer();
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    die;
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}
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if ($show && $cohort->id && confirm_sesskey()) {
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    if (!$cohort->visible) {
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        $record = (object)array('id' => $cohort->id, 'visible' => 1, 'contextid' => $cohort->contextid);
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        cohort_update_cohort($record);
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    }
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    redirect($returnurl);
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}
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if ($hide && $cohort->id && confirm_sesskey()) {
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    if ($cohort->visible) {
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        $record = (object)array('id' => $cohort->id, 'visible' => 0, 'contextid' => $cohort->contextid);
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        cohort_update_cohort($record);
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    }
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    redirect($returnurl);
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}
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$editoroptions = array('maxfiles' => EDITOR_UNLIMITED_FILES,
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    'maxbytes' => $SITE->maxbytes, 'context' => $context);
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if ($cohort->id) {
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    // Edit existing.
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    $cohort = file_prepare_standard_editor($cohort, 'description', $editoroptions,
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            $context, 'cohort', 'description', $cohort->id);
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    $strheading = get_string('editcohort', 'cohort');
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} else {
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    // Add new.
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    $cohort = file_prepare_standard_editor($cohort, 'description', $editoroptions,
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            $context, 'cohort', 'description', null);
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    $strheading = get_string('addcohort', 'cohort');
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}
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$PAGE->set_title($strheading);
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$PAGE->navbar->add($strheading);
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$editform = new cohort_edit_form(null, array('editoroptions'=>$editoroptions, 'data'=>$cohort, 'returnurl'=>$returnurl));
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if ($editform->is_cancelled()) {
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    redirect($returnurl);
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} else if ($data = $editform->get_data()) {
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    $oldcontextid = $context->id;
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    $editoroptions['context'] = $context = context::instance_by_id($data->contextid);
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    if ($data->id) {
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        if ($data->contextid != $oldcontextid) {
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            // Cohort was moved to another context.
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            get_file_storage()->move_area_files_to_new_context($oldcontextid, $context->id,
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                    'cohort', 'description', $data->id);
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        }
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        $data = file_postupdate_standard_editor($data, 'description', $editoroptions,
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                $context, 'cohort', 'description', $data->id);
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        cohort_update_cohort($data);
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    } else {
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        $data->descriptionformat = $data->description_editor['format'];
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        $data->description = $description = $data->description_editor['text'];
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        $data->id = cohort_add_cohort($data);
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        $editoroptions['context'] = $context = context::instance_by_id($data->contextid);
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        $data = file_postupdate_standard_editor($data, 'description', $editoroptions,
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                $context, 'cohort', 'description', $data->id);
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        if ($description != $data->description) {
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            $updatedata = (object)array('id' => $data->id,
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                'description' => $data->description, 'contextid' => $context->id);
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            cohort_update_cohort($updatedata);
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        }
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    }
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    if ($returnurl->get_param('showall') || $returnurl->get_param('contextid') == $data->contextid) {
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        // Redirect to where we were before.
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        redirect($returnurl);
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    } else {
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        // Use new context id, it has been changed.
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        redirect(new moodle_url('/cohort/index.php', array('contextid' => $data->contextid)));
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    }
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}
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echo $OUTPUT->header();
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echo $OUTPUT->heading($strheading);
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if (!$id && ($editcontrols = cohort_edit_controls($context, $baseurl))) {
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    echo $OUTPUT->render($editcontrols);
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}
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echo $editform->display();
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echo $OUTPUT->footer();
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