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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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* Statement definition object for xAPI structure checking and usage.
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*
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* @package core_xapi
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* @copyright 2020 Ferran Recio
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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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namespace core_xapi\local\statement;
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use core_xapi\xapi_exception;
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use core_xapi\iri;
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use stdClass;
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defined('MOODLE_INTERNAL') || die();
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/**
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* Validation and usage of xAPI definition.
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*
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* Definition contains extra information about user interaction with
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* questions and other activities inside a xAPI statement. For now
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* it performs a basic validation on the provided data.
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*
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* @copyright 2020 Ferran Recio
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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 item_definition extends item {
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/** @var string The statement. */
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protected $interactiontype;
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/**
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* Function to create a definition from part of the xAPI statement.
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*
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* @param stdClass $data the original xAPI element.
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*/
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protected function __construct(stdClass $data) {
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parent::__construct($data);
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$this->interactiontype = $data->interactionType ?? null;
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}
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/**
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* Function to create an item from part of the xAPI statement.
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*
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* @param stdClass $data the original xAPI element
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* @return item item_definition xAPI generated
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*/
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public static function create_from_data(stdClass $data): item {
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// Interaction Type is a optopnal param.
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if (!empty($data->interactionType)) {
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$posiblevalues = [
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'choice' => true,
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'fill-in' => true,
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'long-fill-in' => true,
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'true-false' => true,
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'matching' => true,
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'performance' => true,
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'sequencing' => true,
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'likert' => true,
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'numeric' => true,
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'other' => true,
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'compound' => true,
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];
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if (!isset($posiblevalues[$data->interactionType])) {
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throw new xapi_exception("Invalid definition \"{$data->interactionType}\"");
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}
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}
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return new self($data);
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}
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/**
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* Return the definition interaction type.
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*/
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public function get_interactiontype(): ?string {
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return $this->interactiontype;
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}
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}
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