<?php
// 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/>.

/**
 * This page provides the Administration -> ... -> Theme selector UI.
 *
 * @package core
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once(__DIR__ . '/../config.php');
require_once($CFG->libdir . '/adminlib.php');

$choose = optional_param('choose', '', PARAM_PLUGIN);
$reset  = optional_param('reset', 0, PARAM_BOOL);

< $device = optional_param('device', '', PARAM_TEXT);
< $unsettheme = optional_param('unsettheme', 0, PARAM_BOOL);


$confirmation = optional_param('confirmation', 0, PARAM_BOOL);

admin_externalpage_setup('themeselector');


< if (!empty($device)) {
<     // Make sure the device requested is valid.
<     $devices = core_useragent::get_device_type_list();
<     if (!in_array($device, $devices)) {
<         // The provided device isn't a valid device throw an error.
<         print_error('invaliddevicetype');
<     }
< }
< 


unset($SESSION->theme);


> $PAGE->set_primary_active_tab('siteadminnode');
if ($reset and confirm_sesskey()) {
> $PAGE->navbar->add(get_string('themeselector', 'admin'), $PAGE->url);
    theme_reset_all_caches();
> 
} else if ($choose && $confirmation) {
> // Clear theme cache.



< } else if ($choose && $confirmation) {



> }



<     $theme = theme_config::load($choose);
<     echo $OUTPUT->header();
<     echo $OUTPUT->heading(get_string('themesaved'));
<     echo $OUTPUT->box_start();
<     echo format_text(get_string('choosereadme', 'theme_'.$theme->name), FORMAT_MOODLE);
<     echo $OUTPUT->box_end();
<     echo $OUTPUT->continue_button($CFG->wwwroot . '/theme/index.php');
<     echo $OUTPUT->footer();
<     exit;



> $definedinconfig = array_key_exists('theme', $CFG->config_php_settings);
> if ($definedinconfig) {
>     $forcedthemename = get_string('pluginname', 'theme_'.$CFG->theme);
>     // Show a notification that the theme is defined in config.php.
>     \core\notification::info(get_string('themedefinedinconfigphp', 'admin', $forcedthemename));
> }
> 
> // Change theme.
> if (!$definedinconfig && !empty($choose) && confirm_sesskey()) {




< } else if ($choose && $device && !theme_is_device_locked($device) && !$unsettheme && confirm_sesskey()) {


    // Load the theme to make sure it is valid.
    $theme = theme_config::load($choose);


<     // Get the config argument for the chosen device.
<     $themename = core_useragent::get_device_type_cfg_var_name($device);
<     set_config($themename, $theme->name);
< 
<     $urlconfirm = new moodle_url('/theme/index.php', array('confirmation' => 1, 'choose' => $choose));
<     redirect($urlconfirm);
< } else if ($device && !theme_is_device_locked($device) && $unsettheme && confirm_sesskey() && ($device != 'default')) {
<     // Unset the theme and continue.
<     unset_config(core_useragent::get_device_type_cfg_var_name($device));
<     $device = '';
< }
< 
< // Otherwise, show either a list of devices, or is enabledevicedetection set to no or a
< // device is specified show a list of themes.
< 
< $table = new html_table();
< $table->data = array();
< $heading = '';
< if (!empty($CFG->enabledevicedetection) && empty($device)) {
<     $heading = get_string('selectdevice', 'admin');
<     // Display a list of devices that a user can select a theme for.
< 
<     $strthemenotselected = get_string('themenoselected', 'admin');
<     $strthemeselect = get_string('themeselect', 'admin');
< 
<     // Display the device selection screen.
<     $table->id = 'admindeviceselector';
<     $table->head = array(get_string('devicetype', 'admin'), get_string('currenttheme', 'admin'), get_string('info'));
< 
<     $devices = core_useragent::get_device_type_list();
<     foreach ($devices as $thedevice) {
< 
<         $headingthemename = ''; // To output the picked theme name when needed.
<         $themename = core_useragent::get_device_type_theme($thedevice);
<         if (!$themename && $thedevice == 'default') {
<             $themename = theme_config::DEFAULT_THEME;
<         }
<         $themelocked = theme_is_device_locked($thedevice);
< 
<         $screenshotcell = $strthemenotselected;
<         $unsetthemebutton = '';
<         if ($themename) {
<             // Check the theme exists.
<             $themename = clean_param($themename, PARAM_THEME);
<             if (empty($themename)) {
<                 // Likely the theme has been deleted.
<                 unset_config(core_useragent::get_device_type_cfg_var_name($thedevice));



>     if ($theme instanceof \theme_config) {
>         set_config('theme', $theme->name);
>         $notifytype = 'success';
>         $notifymessage = get_string('themesaved');


            } else {

<                 $strthemename = get_string('pluginname', 'theme_'.$themename);
<                 // Link to the screenshot, now mandatory - the image path is hardcoded because we need image from other themes,
<                 // not the current one.
<                 $screenshoturl = new moodle_url('/theme/image.php',
<                     array('theme' => $themename, 'image' => 'screenshot', 'component' => 'theme'));
<                 // Contents of the screenshot/preview cell.
<                 $screenshotcell = html_writer::empty_tag('img', array('class' => 'img-responsive img-fluid',
<                     'src' => $screenshoturl, 'alt' => $strthemename));
<                 // Show the name of the picked theme.
<                 $headingthemename = $OUTPUT->heading($strthemename, 3);
<             }
<             // If not default device then show option to unset theme.
<             if ($thedevice != 'default' && !$themelocked) {
<                 $unsetthemestr = get_string('unsettheme', 'admin');
<                 $unsetthemeurl = new moodle_url('/theme/index.php',
<                     array('device' => $thedevice, 'sesskey' => sesskey(), 'unsettheme' => true));
<                 $unsetthemebutton = new single_button($unsetthemeurl, $unsetthemestr, 'get');
<                 $unsetthemebutton = $OUTPUT->render($unsetthemebutton);
<             }



>         $notifytype = 'error';
>         $notifymessage = get_string('error');


        }


<         $deviceurl = new moodle_url('/theme/index.php', array('device' => $thedevice, 'sesskey' => sesskey()));
< 
<         $select = '';
<         if (!$themelocked) {
<             $select = $OUTPUT->render(new single_button($deviceurl, $strthemeselect, 'get'));
<         }
< 
<         $lockwarning = '';
<         if ($themelocked) {
<             $lockwarning = html_writer::div(get_string('configoverride', 'admin'), 'alert alert-info');
<         }
< 
<         $table->data[] = array(
<             $OUTPUT->heading(ucfirst($thedevice), 3),
<             $screenshotcell,
<             $headingthemename . $lockwarning . $select . $unsetthemebutton
<         );
<     }
< } else {
<     // Either a device has been selected of $CFG->enabledevicedetection is off so display a list
<     // of themes to select.
<     $heading = get_string('selecttheme', 'admin', $device);
<     if (empty($device)) {
<         // If $CFG->enabledevicedetection is off this will return 'default'.
<         $device = core_useragent::get_device_type();



>     // Redirect with notification.
>     redirect(new moodle_url('/theme/index.php'), $notifymessage, null, $notifytype);


    }


<     $themelocked = theme_is_device_locked($device);



> $table = new html_table();
> $table->data = [];


    $table->id = 'adminthemeselector';

<     $table->head = array(get_string('theme'), get_string('info'));



> $table->head = [get_string('theme'), get_string('info')];
> $table->align = ['left', 'left'];




<     $themes = array();
<     if ($themelocked) {
<         $heading = get_string('currenttheme', 'admin');
<         $themename = theme_get_locked_theme_for_device($device);
<         $themedirectory = core_component::get_plugin_directory('theme', $themename);
<         $themes[$themename] = $themedirectory;
<     } else {


        $themes = core_component::get_plugin_list('theme');

<     }




> // Loop through available themes.


    foreach ($themes as $themename => $themedir) {


<         // Load the theme config.


        try {
            $theme = theme_config::load($themename);
        } catch (Exception $e) {
            // Bad theme, just skip it for now.
            continue;
        }
        if ($themename !== $theme->name) {
            // Obsoleted or broken theme, just skip for now.
            continue;
        }
        if (empty($CFG->themedesignermode) && $theme->hidefromselector) {
            // The theme doesn't want to be shown in the theme selector and as theme
            // designer mode is switched off we will respect that decision.
            continue;
        }

<         $strthemename = get_string('pluginname', 'theme_'.$themename);
< 
<         // Build the table row, and also a list of items to go in the second cell.
<         $row = array();
<         $infoitems = array();
<         $rowclasses = array();




<         // Set up bools whether this theme is chosen either main or legacy.
<         $ischosentheme = ($themename == core_useragent::get_device_type_theme($device));



>     // Build the table rows.
>     $row = [];
>     $rowclasses = [];
>     $strthemename = get_string('pluginname', 'theme_'.$themename);




<         if ($ischosentheme) {
<             // Is the chosen main theme.
<             $rowclasses[] = 'selectedtheme';
<         }



>     // Screenshot/preview cell.
>     $screenshotpath = new moodle_url('/theme/image.php', ['theme' => $themename, 'image' => 'screenshot', 'component' => 'theme']);
>     $row[] = html_writer::empty_tag('img', ['class' => 'img-fluid', 'src' => $screenshotpath, 'alt' => $strthemename]);




<         // Link to the screenshot, now mandatory - the image path is hardcoded because we need image from other themes,
<         // not the current one.
<         $screenshotpath = new moodle_url('/theme/image.php',
<             array('theme' => $themename, 'image' => 'screenshot', 'component' => 'theme'));
<         // Contents of the first screenshot/preview cell.
<         $row[] = html_writer::empty_tag('img', array('class' => 'img-responsive img-fluid',
<             'src' => $screenshotpath, 'alt' => $strthemename));
<         // Contents of the second cell.



>     // Info cell.


        $infocell = $OUTPUT->heading($strthemename, 3);


<         if ($themelocked) {



>     // Is this the current theme?
>     if ($themename == $CFG->theme) {
>         $rowclasses[] = 'selectedtheme';
>         if ($definedinconfig) {


            $infocell .= html_writer::div(get_string('configoverride', 'admin'), 'alert alert-info');
        }

< 
<         // Button to choose this as the main theme or unset this theme for devices other then default.
<         if (!$themelocked) {
<             if (($ischosentheme) && ($device != 'default')) {
<                 $unsetthemestr = get_string('unsettheme', 'admin');
<                 $unsetthemeurl = new moodle_url('/theme/index.php',
<                     array('device' => $device, 'unsettheme' => true, 'sesskey' => sesskey()));
<                 $unsetbutton = new single_button($unsetthemeurl, $unsetthemestr, 'get');
<                 $infocell .= $OUTPUT->render($unsetbutton);
<             } else if ((!$ischosentheme)) {



>     } else if (!$definedinconfig) {
>         // Button to choose this as the main theme.


                $setthemestr = get_string('usetheme');

<                 $setthemeurl = new moodle_url('/theme/index.php',
<                     array('device' => $device, 'choose' => $themename, 'sesskey' => sesskey()));
<                 $setthemebutton = new single_button($setthemeurl, $setthemestr, 'get');
<                 $infocell .= $OUTPUT->render($setthemebutton);
<             }



>         $setthemeurl = new moodle_url('/theme/index.php', ['choose' => $themename, 'sesskey' => sesskey()]);
>         $setthemebutton = new single_button($setthemeurl, $setthemestr, 'post');
>         $infocell .= html_writer::div($OUTPUT->render($setthemebutton), 'mt-2');


        }

< 


        $row[] = $infocell;

        $table->data[$themename] = $row;
        $table->rowclasses[$themename] = join(' ', $rowclasses);

>     $table->responsive = false;


    }

< }
< echo $OUTPUT->header('themeselector');
< echo $OUTPUT->heading($heading);




< $params = array('sesskey' => sesskey(), 'reset' => 1);
< if (!empty($device)) {
<     $params['device'] = $device;
< }
< echo $OUTPUT->single_button(new moodle_url('index.php', $params), get_string('themeresetcaches', 'admin'));



> // Show heading.
> echo $OUTPUT->header();
> echo $OUTPUT->heading(get_string('themeselector', 'admin'));




< echo html_writer::table($table);



> // Reset theme caches button.
> $reseturl = new moodle_url('index.php', ['sesskey' => sesskey(), 'reset' => 1]);
> echo $OUTPUT->single_button($reseturl, get_string('themeresetcaches', 'admin'), 'post');




> // Render main table.
echo $OUTPUT->footer();
> echo html_writer::table($table);