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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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 * Course completion critieria - completion on unenrolment
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 *
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 * @package core_completion
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 * @category completion
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 * @copyright 2009 Catalyst IT Ltd
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 * @author Aaron Barnes <aaronb@catalyst.net.nz>
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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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defined('MOODLE_INTERNAL') || die();
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/**
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 * Course completion critieria - completion on unenrolment
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 *
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 * @package core_completion
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 * @category completion
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 * @copyright 2009 Catalyst IT Ltd
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 * @author Aaron Barnes <aaronb@catalyst.net.nz>
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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 completion_criteria_unenrol extends completion_criteria {
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    /* @var int Criteria type constant [COMPLETION_CRITERIA_TYPE_UNENROL] */
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    public $criteriatype = COMPLETION_CRITERIA_TYPE_UNENROL;
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    /**
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     * Finds and returns a data_object instance based on params.
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     *
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     * @param array $params associative arrays varname=>value
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     * @return data_object data_object instance or false if none found.
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     */
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    public static function fetch($params) {
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        $params['criteriatype'] = COMPLETION_CRITERIA_TYPE_UNENROL;
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        return self::fetch_helper('course_completion_criteria', __CLASS__, $params);
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    }
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    /**
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     * Add appropriate form elements to the critieria form
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     *
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     * @param moodleform $mform Moodle forms object
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     * @param stdClass $data Form data
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     */
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    public function config_form_display(&$mform, $data = null) {
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        $mform->addElement('checkbox', 'criteria_unenrol', get_string('enable'));
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        if ($this->id) {
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            $mform->setDefault('criteria_unenrol', 1);
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        }
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    }
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    /**
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     * Update the criteria information stored in the database
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     *
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     * @param stdClass $data Form data
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     */
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    public function update_config(&$data) {
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        if (!empty($data->criteria_unenrol)) {
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            $this->course = $data->id;
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            $this->insert();
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        }
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    }
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    /**
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     * Review this criteria and decide if the user has completed
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     *
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     * @param completion_completion $completion The user's completion record
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     * @param bool $mark Optionally set false to not save changes to database
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     * @return bool
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     */
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    public function review($completion, $mark = true) {
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        // Check enrolment
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        return false;
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    }
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    /**
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     * Return criteria title for display in reports
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     *
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     * @return string
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     */
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    public function get_title() {
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        return get_string('unenrol', 'enrol');
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    }
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    /**
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     * Return a more detailed criteria title for display in reports
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     *
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     * @return string
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     */
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    public function get_title_detailed() {
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        return $this->get_title();
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    }
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    /**
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     * Return criteria type title for display in reports
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     *
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     * @return string
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     */
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    public function get_type_title() {
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        return get_string('unenrol', 'enrol');
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    }
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    /**
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     * Return criteria progress details for display in reports
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     *
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     * @param completion_completion $completion The user's completion record
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     * @return array An array with the following keys:
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     *     type, criteria, requirement, status
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     */
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    public function get_details($completion) {
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        $details = array();
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        $details['type'] = get_string('unenrolment', 'completion');
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        $details['criteria'] = get_string('unenrolment', 'completion');
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        $details['requirement'] = get_string('unenrolingfromcourse', 'completion');
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        $details['status'] = '';
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        return $details;
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    }
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    /**
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     * Return pix_icon for display in reports.
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     *
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     * @param string $alt The alt text to use for the icon
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     * @param array $attributes html attributes
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     * @return pix_icon
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     */
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    public function get_icon($alt, array $attributes = null) {
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        return new pix_icon('i/user', $alt, 'moodle', $attributes);
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    }
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}