moodle/admin/modules.php

<?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/>.

/**
 * A page to manage activity modules.
 *
 * @package   core_admin
 * @copyright 2023 Andrew Lyons <andrew@nicols.co.uk>
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once('../config.php');
require_once('../course/lib.php');
require_once("{$CFG->libdir}/adminlib.php");
require_once("{$CFG->libdir}/tablelib.php");

define('MODULE_TABLE', 'module_administration_table');

admin_externalpage_setup('managemodules');

$show = optional_param('show', '', PARAM_PLUGIN);
$hide = optional_param('hide', '', PARAM_PLUGIN);

// Print headings.
$stractivities = get_string("activities");
$struninstall = get_string('uninstallplugin', 'core_admin');
$strversion = get_string("version");
$strhide = get_string("hide");
$strshow = get_string("show");
$strsettings = get_string("settings");
$stractivities = get_string("activities");
$stractivitymodule = get_string("activitymodule");
$strshowmodulecourse = get_string('showmodulecourse');

// If data submitted, then process and store.
if (!empty($hide) && confirm_sesskey()) {
    $class = \core_plugin_manager::resolve_plugininfo_class('mod');
    if ($class::enable_plugin($hide, false)) {
        // Settings not required - only pages.
        admin_get_root(true, false);
    }
    redirect(new moodle_url('/admin/modules.php'));
}

if (!empty($show) && confirm_sesskey()) {
    $class = \core_plugin_manager::resolve_plugininfo_class('mod');
    if ($class::enable_plugin($show, true)) {
        // Settings not required - only pages.
        admin_get_root(true, false);
    }
    redirect(new moodle_url('/admin/modules.php'));
}

echo $OUTPUT->header();
echo $OUTPUT->heading($stractivities);

// Get and sort the existing modules.
if (!$modules = $DB->get_records('modules', [], 'name ASC')) {
    throw new \moodle_exception('moduledoesnotexist', 'error');
}

// Print the table of all modules.
// Construct the flexible table ready to display.
$table = new flexible_table(MODULE_TABLE);
$table->define_columns(['name', 'instances', 'version', 'hideshow', 'uninstall', 'settings']);
$table->define_headers([$stractivitymodule, $stractivities, $strversion, "$strhide/$strshow", $strsettings, $struninstall]);
$table->define_baseurl($CFG->wwwroot . '/' . $CFG->admin . '/modules.php');
$table->set_attribute('id', 'modules');
$table->set_attribute('class', 'admintable generaltable');
$table->setup();

$pluginmanager = core_plugin_manager::instance();

foreach ($modules as $module) {
    $plugininfo = $pluginmanager->get_plugin_info('mod_' . $module->name);
    $status = $plugininfo->get_status();

    if ($status === core_plugin_manager::PLUGIN_STATUS_MISSING) {
        $strmodulename = '<span class="notifyproblem">' . $module->name . ' (' . get_string('missingfromdisk') . ')</span>';
        $missing = true;
    } else {
        $icon = "<img src=\"" . $OUTPUT->image_url('monologo', $module->name) . "\" class=\"icon\" alt=\"\" />";
        $strmodulename = $icon . ' ' . get_string('modulename', $module->name);
        $missing = false;
    }

    $uninstall = '';
    if ($uninstallurl = core_plugin_manager::instance()->get_uninstall_url('mod_' . $module->name, 'manage')) {
        $uninstall = html_writer::link($uninstallurl, $struninstall);
    }

    if (
        file_exists("$CFG->dirroot/mod/$module->name/settings.php") ||
        file_exists("$CFG->dirroot/mod/$module->name/settingstree.php")
    ) {
        $settings = "<a href=\"settings.php?section=modsetting$module->name\">$strsettings</a>";
    } else {
        $settings = "";
    }

    try {
        $count = $DB->count_records_select($module->name, "course<>0");
    } catch (dml_exception $e) {
        $count = -1;
    }
    if ($count > 0) {
        $countlink = $OUTPUT->action_link(
            new moodle_url('/course/search.php', ['modulelist' => $module->name]),
            $count,
            null,
            ['title' => $strshowmodulecourse]
        );
    } else if ($count < 0) {
        $countlink = get_string('error');
    } else {
        $countlink = "$count";
    }

    if ($missing) {
        $visible = '';
        $class = '';
    } else if ($module->visible) {
        $visible = "<a href=\"modules.php?hide=$module->name&amp;sesskey=" . sesskey() . "\" title=\"$strhide\">" .
            $OUTPUT->pix_icon('t/hide', $strhide) . '</a>';
        $class = '';
    } else {
        $visible = "<a href=\"modules.php?show=$module->name&amp;sesskey=" . sesskey() . "\" title=\"$strshow\">" .
            $OUTPUT->pix_icon('t/show', $strshow) . '</a>';
        $class = 'dimmed_text';
    }
    if ($module->name == "forum") {
        $uninstall = "";
        $visible = "";
        $class = "";
    }
    $version = get_config('mod_' . $module->name, 'version');

    $table->add_data([
        $strmodulename,
        $countlink,
        $version,
        $visible,
        $settings,
        $uninstall,
    ], $class);
}

$table->finish_html();

echo $OUTPUT->footer();