{{!
    This file is part of Moodle - http://moodle.org/

    Moodle is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Moodle is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
}}
{{!
    @template core_admin/setting_configmultiselect_optgroup

    Admin multiselect setting template with optgroup support.

    Context variables required for this template:
    * name - form element name
    * id - element id
    * size - element size
    * options - list of options not grouped
    * optgroups - list of options grouped containing the group label and for each option: name, value, selected

    Example context (json):
    {
        "name": "test",
        "id": "test0",
        "size": "3",
        "options": [
            { "name": "Option 1", "value": "V", "selected": false },
            { "name": "Option 2", "value": "V", "selected": true }
        ],
        "optgroups": [
            {
                "label": "Group 1",
                "options": [
                    { "name": "Option 3", "value": "V", "selected": false },
                    { "name": "Option 4", "value": "V", "selected": true }
                ]
            },
            {
                "label": "Group 2",
                "options": [
                    { "name": "Option 5", "value": "V", "selected": false },
                    { "name": "Option 6", "value": "V", "selected": true }
                ]
            }
        ]
    }
}}
<div class="form-select">
    <input type="hidden" name="{{name}}[xxxxx]" value="1">
    <select id="{{id}}" name="{{name}}[]" size="{{size}}" multiple>
        {{#options}}
            <option value="{{value}}" {{#selected}}selected{{/selected}}>{{name}}</option>
        {{/options}}
        {{#optgroups}}
            <optgroup label="{{label}}">
                {{#options}}
                    <option value="{{value}}" {{#selected}}selected{{/selected}}>{{name}}</option>
                {{/options}}
            </optgroup>
        {{/optgroups}}
    </select>
</div>