feat(styles): administrator-managed style registry for the embedded editor

admin/styles.php

@@ -0,0 +1,183 @@
+<?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/>.
+
+/**
+ * Admin page for managing eXeLearning styles exposed to the embedded editor.
+ *
+ * @package    mod_exeweb
+ * @copyright  2025 eXeLearning
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+require('../../../config.php');
+require_once($CFG->libdir . '/adminlib.php');
+
+use mod_exeweb\local\styles_service;
+
+admin_externalpage_setup('mod_exeweb_styles');
+
+$context = \context_system::instance();
+require_capability('moodle/site:config', $context);
+require_capability('mod/exeweb:manageembeddededitor', $context);
+
+$action = optional_param('action', '', PARAM_ALPHA);
+$returnurl = new moodle_url('/mod/exeweb/admin/styles.php');
+$settingsurl = new moodle_url('/admin/settings.php', ['section' => 'modsettingexeweb']);
+
+// --------------------------------------------------------------------
+// Toggle/delete actions use GET + sesskey (simple URL handlers).
+// Upload happens inline in the plugin settings page.
+// --------------------------------------------------------------------
+if ($action !== '') {
+    require_sesskey();
+    switch ($action) {
+        case 'toggleuploaded':
+            $slug = required_param('slug', PARAM_TEXT);
+            $enabled = (bool) required_param('enabled', PARAM_INT);
+            styles_service::set_uploaded_enabled($slug, $enabled);
+            redirect($returnurl);
+            break;
+
+        case 'togglebuiltin':
+            $id = required_param('id', PARAM_TEXT);
+            $enabled = (bool) required_param('enabled', PARAM_INT);
+            styles_service::set_builtin_enabled($id, $enabled);
+            redirect($returnurl);
+            break;
+
+        case 'delete':
+            $slug = required_param('slug', PARAM_TEXT);
+            styles_service::delete_uploaded($slug);
+            redirect($returnurl,
+                get_string('stylesdelete_success', 'mod_exeweb'),
+                null,
+                \core\output\notification::NOTIFY_SUCCESS
+            );
+            break;
+    }
+}
+
+// --------------------------------------------------------------------
+// Render.
+// --------------------------------------------------------------------
+echo $OUTPUT->header();
+echo $OUTPUT->heading(get_string('stylesmanager', 'mod_exeweb'));
+
+if (get_config('exeweb', 'editormode') !== 'embedded') {
+    echo $OUTPUT->notification(get_string('stylesonlywhenembedded', 'mod_exeweb'),
+        \core\output\notification::NOTIFY_WARNING);
+}
+
+echo html_writer::tag('p', get_string('stylesmanager_intro', 'mod_exeweb'));
+
+// Point admins at the inline uploader on the plugin settings page —
+// the filemanager there is the single entry point for uploading styles.
+echo html_writer::tag('p',
+    html_writer::link(
+        $settingsurl,
+        get_string('stylesupload_goto_settings', 'mod_exeweb'),
+        ['class' => 'btn btn-secondary']
+    )
+);
+
+// Uploaded styles table.
+$uploaded = styles_service::list_uploaded_styles();
+echo $OUTPUT->heading(get_string('stylesuploaded', 'mod_exeweb'), 3);
+if (empty($uploaded)) {
+    echo html_writer::tag('p', get_string('stylesuploaded_empty', 'mod_exeweb'), ['class' => 'text-muted']);
+} else {
+    $table = new html_table();
+    $table->head = [
+        get_string('stylestable_title', 'mod_exeweb'),
+        get_string('stylestable_id', 'mod_exeweb'),
+        get_string('stylestable_version', 'mod_exeweb'),
+        get_string('stylestable_installed', 'mod_exeweb'),
+        get_string('stylestable_enabled', 'mod_exeweb'),
+        get_string('stylestable_actions', 'mod_exeweb'),
+    ];
+    foreach ($uploaded as $style) {
+        $toggleurl = new moodle_url('/mod/exeweb/admin/styles.php', [
+            'action' => 'toggleuploaded',
+            'slug' => $style['id'],
+            'enabled' => empty($style['enabled']) ? 1 : 0,
+            'sesskey' => sesskey(),
+        ]);
+        $togglelabel = empty($style['enabled'])
+            ? get_string('stylesenable', 'mod_exeweb')
+            : get_string('stylesdisable', 'mod_exeweb');
+        $deleteurl = new moodle_url('/mod/exeweb/admin/styles.php', [
+            'action' => 'delete',
+            'slug' => $style['id'],
+            'sesskey' => sesskey(),
+        ]);
+        $table->data[] = [
+            s($style['title'] ?? $style['id']),
+            html_writer::tag('code', s($style['id'])),
+            s($style['version'] ?? ''),
+            s($style['installed_at'] ?? ''),
+            html_writer::link($toggleurl, $togglelabel, ['class' => 'btn btn-secondary btn-sm']),
+            html_writer::link(
+                $deleteurl,
+                get_string('stylesdelete', 'mod_exeweb'),
+                [
+                    'class' => 'btn btn-danger btn-sm',
+                    'onclick' => "return confirm('"
+                        . addslashes_js(get_string('stylesdelete_confirm', 'mod_exeweb'))
+                        . "');",
+                ]
+            ),
+        ];
+    }
+    echo html_writer::table($table);
+}
+
+// Built-in styles table.
+$builtins = styles_service::list_builtin_themes();
+echo $OUTPUT->heading(get_string('stylesbuiltin', 'mod_exeweb'), 3);
+if (empty($builtins)) {
+    echo html_writer::tag('p', get_string('stylesbuiltin_empty', 'mod_exeweb'), ['class' => 'text-muted']);
+} else {
+    $registry = styles_service::get_registry();
+    $disabledlist = $registry['disabled_builtins'];
+    $table = new html_table();
+    $table->head = [
+        get_string('stylestable_title', 'mod_exeweb'),
+        get_string('stylestable_id', 'mod_exeweb'),
+        get_string('stylestable_version', 'mod_exeweb'),
+        get_string('stylestable_enabled', 'mod_exeweb'),
+    ];
+    foreach ($builtins as $style) {
+        $isdisabled = in_array($style['id'], $disabledlist, true);
+        $toggleurl = new moodle_url('/mod/exeweb/admin/styles.php', [
+            'action' => 'togglebuiltin',
+            'id' => $style['id'],
+            'enabled' => $isdisabled ? 1 : 0,
+            'sesskey' => sesskey(),
+        ]);
+        $togglelabel = $isdisabled
+            ? get_string('stylesenable', 'mod_exeweb')
+            : get_string('stylesdisable', 'mod_exeweb');
+        $table->data[] = [
+            s($style['title']),
+            html_writer::tag('code', s($style['id'])),
+            s($style['version']),
+            html_writer::link($toggleurl, $togglelabel, ['class' => 'btn btn-secondary btn-sm']),
+        ];
+    }
+    echo html_writer::table($table);
+}
+
+echo $OUTPUT->footer();

classes/admin/admin_setting_stylesbuiltins.php

@@ -0,0 +1,124 @@
+<?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/>.
+
+/**
+ * Admin setting that renders built-in styles as a list of checkboxes.
+ *
+ * @package    mod_exeweb
+ * @copyright  2025 eXeLearning
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_exeweb\admin;
+
+defined('MOODLE_INTERNAL') || die();
+
+use mod_exeweb\local\styles_service;
+
+/**
+ * Per-built-in style enable/disable checkboxes, inline in the plugin
+ * settings page. Source of truth stays in the styles registry
+ * (`config_plugin(exeweb).styles_registry`), so the widget reads state
+ * from it at render time and writes back through the service.
+ */
+class admin_setting_stylesbuiltins extends \admin_setting {
+
+    /**
+     * @param string $name Setting key (used for the HTML input name).
+     */
+    public function __construct(string $name) {
+        parent::__construct(
+            $name,
+            get_string('stylesbuiltin', 'mod_exeweb'),
+            get_string('stylesbuiltin_hint', 'mod_exeweb'),
+            []
+        );
+    }
+
+    /**
+     * This setting does not live in $CFG; the registry owns the state.
+     *
+     * @return array
+     */
+    public function get_setting() {
+        return [];
+    }
+
+    /**
+     * @return array
+     */
+    public function get_defaultsetting() {
+        return [];
+    }
+
+    /**
+     * Persist checkbox state back into the registry.
+     *
+     * @param array $data Posted value map (slug => '1' when checked).
+     * @return string Empty on success.
+     */
+    public function write_setting($data) {
+        if (!is_array($data)) {
+            $data = [];
+        }
+        foreach (styles_service::list_builtin_themes() as $theme) {
+            $id = $theme['id'];
+            $enabled = !empty($data[$id]);
+            styles_service::set_builtin_enabled($id, $enabled);
+        }
+        return '';
+    }
+
+    /**
+     * Render the checkbox list.
+     *
+     * @param mixed  $data  Unused — current state comes from the registry.
+     * @param string $query Current admin search query.
+     * @return string
+     */
+    public function output_html($data, $query = '') {
+        $registry = styles_service::get_registry();
+        $disabled = $registry['disabled_builtins'];
+        $builtins = styles_service::list_builtin_themes();
+        if (empty($builtins)) {
+            $html = \html_writer::tag('p',
+                get_string('stylesbuiltin_empty', 'mod_exeweb'),
+                ['class' => 'text-muted']
+            );
+            return format_admin_setting($this, $this->visiblename, $html, $this->description);
+        }
+        $rows = '';
+        foreach ($builtins as $theme) {
+            $id = $theme['id'];
+            $checked = in_array($id, $disabled, true) ? '' : 'checked';
+            $inputname = $this->get_full_name() . '[' . $id . ']';
+            $version = !empty($theme['version'])
+                ? ' <span class="text-muted small">v' . s($theme['version']) . '</span>'
+                : '';
+            $rows .= '<li style="margin-bottom:.25em;">'
+                . '<label>'
+                . '<input type="checkbox" name="' . s($inputname) . '" value="1" ' . $checked . '> '
+                . s($theme['title'])
+                . $version
+                . ' <code class="text-muted small">' . s($id) . '</code>'
+                . '</label>'
+                . '</li>';
+        }
+        $html = '<ul class="mod_exeweb-styles-builtins list-unstyled" '
+            . 'style="list-style:none;padding:0;margin:0;">' . $rows . '</ul>';
+        return format_admin_setting($this, $this->visiblename, $html, $this->description);
+    }
+}