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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 attachment 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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/**
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* Abstract xAPI attachment class.
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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_attachment extends item {
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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_attachment xAPI generated
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*/
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public static function create_from_data(stdClass $data): item {
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if (empty($data->usageType)) {
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throw new xapi_exception("missing attachment usageType");
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}
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if (!iri::check($data->usageType)) {
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throw new xapi_exception("attachment usageType $data->usageType is not a valid IRI");
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}
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if (empty($data->display)) {
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throw new xapi_exception("missing attachment display");
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}
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if (empty($data->contentType)) {
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throw new xapi_exception("missing attachment contentType");
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}
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if (empty($data->length)) {
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throw new xapi_exception("missing attachment length");
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}
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if (!is_numeric($data->length)) {
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throw new xapi_exception("invalid attachment length format");
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}
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if (empty($data->sha2)) {
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throw new xapi_exception("missing attachment sha2");
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}
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// More required property checks will appear here in the future.
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return new self($data);
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}
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}
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