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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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namespace qbank_customfields;
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use core_question\local\bank\plugin_features_base;
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use core_question\local\bank\view;
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use qbank_customfields\customfield\question_handler;
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/**
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 * Class plugin_feature is the entrypoint for the columns.
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 *
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 * @package    qbank_customfields
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 * @copyright  2021 Catalyst IT Australia Pty Ltd
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 * @author     Ghaly Marc-Alexandre <marc-alexandreghaly@catalyst-ca.net>
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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 plugin_feature extends plugin_features_base {
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    /**
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     * This method will return the array of objects to be rendered as a prt of question bank columns/actions.
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     *
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     * @param view $qbank
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     * @return array
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     */
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    public function get_question_columns(view $qbank): array {
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        // We make a column for each custom field and load the data into it.
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        $columns = [];
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        // First get all the available question custom fields.
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        $customfieldhandler = question_handler::create();
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        $fields = $customfieldhandler->get_fields();
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        $context = $qbank->get_most_specific_context();
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        // Iterate through the fields initialising a column for each.
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        // We don't need to know the values that questions have at this stage.
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        foreach ($fields as $field) {
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            if ($customfieldhandler->can_view_type($field, $context)) {
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                $customfieldcolumn = new custom_field_column($qbank, $field);
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                $columns[] = $customfieldcolumn;
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            }
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        }
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        return $columns;
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    }
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}