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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 tool_usertours\local\filter;
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use tool_usertours\tour;
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use context;
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/**
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* Theme filter.
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*
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* @package tool_usertours
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* @copyright 2016 Andrew Nicols <andrew@nicols.co.uk>
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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 theme extends base {
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/**
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* The name of the filter.
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*
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* @return string
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*/
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public static function get_filter_name() {
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return 'theme';
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}
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/**
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* Retrieve the list of available filter options.
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*
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* @return array An array whose keys are the valid options
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* And whose values are the values to display
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*/
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public static function get_filter_options() {
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$manager = \core_plugin_manager::instance();
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$themes = $manager->get_installed_plugins('theme');
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$options = [];
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foreach (array_keys($themes) as $themename) {
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try {
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$theme = \theme_config::load($themename);
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} catch (Exception $e) {
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// Bad theme, just skip it for now.
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continue;
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}
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if ($themename !== $theme->name) {
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// Obsoleted or broken theme, just skip for now.
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continue;
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}
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if ($theme->hidefromselector) {
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// The theme doesn't want to be shown in the theme selector and as theme
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// designer mode is switched off we will respect that decision.
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continue;
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}
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$options[$theme->name] = get_string('pluginname', "theme_{$theme->name}");
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}
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return $options;
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}
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/**
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* Check whether the filter matches the specified tour and/or context.
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*
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* @param tour $tour The tour to check
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* @param context $context The context to check
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* @return boolean
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*/
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public static function filter_matches(tour $tour, context $context) {
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global $PAGE;
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$values = $tour->get_filter_values('theme');
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if (empty($values)) {
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// There are no values configured.
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// No values means all.
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return true;
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}
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// Presence within the array is sufficient. Ignore any value.
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$values = array_flip($values);
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return isset($values[$PAGE->theme->name]);
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}
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}
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