/theme/bootstrap/renderers.php

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<?php
/* renderers to align Moodle's HTML with that expected by Bootstrap */

class theme_bootstrap_core_renderer extends core_renderer {

    static $icons_ignore = array(
            'icon' => '?',      // all the module icons have this name
            't/groups' => '?',
            't/groupn' => '?',
            't/groupv' => '?' );

    static $icons = array(
            'docs' => 'question-sign',
            'book' => 'book',
            'chapter' => 'file',
            'spacer' => 'spacer',
            'generate' => 'gift',
            'add' => 'plus',
            't/hide' => 'eye-open',
            'i/hide' => 'eye-open',
            't/show' => 'eye-close',
            'i/show' => 'eye-close',
            't/add' => 'plus',
            't/right' => 'arrow-right',
            't/left' => 'arrow-left',
            't/up' => 'arrow-up',
            't/down' => 'arrow-down',
            't/edit' => 'edit',
            't/editstring' => 'tag',
            't/delete' => 'remove',
            'i/edit' => 'pencil',
            't/copy' => 'copy', // created png from font awesome
            'i/settings' => 'list-alt',
            'i/grades' => 'grades',
            'i/group' => 'user',
            't/switch_plus' => 'plus-sign',
            't/switch_minus' => 'minus-sign',
            'i/filter' => 'filter',
            't/move' => 'resize-vertical',
            'i/move_2d' => 'move',
            'i/backup' => 'cog',
            'i/restore' => 'cog',
            'i/return' => 'repeat',
            'i/reload' => 'refresh',
            'i/roles' => 'user',
            'i/user' => 'user',
            'i/users' => 'user',
            'i/publish' => 'publish',
            'i/navigationitem' => 'chevron-right' );


    protected static function icon($name, $text=null) {
        if (!$text) {$text = $name;}
        return "<i class=icon-$name>$text</i>";
    }
    protected static function moodle_icon($name) {
        return self::icon(self::$icons[$name]);
    }
    public function icon_help() {
        return self::icon('question-sign');
    } 

    protected static function a($attributes, $content) {
        return html_writer::tag('a', $content, $attributes);
    }
    protected static function div($attributes, $content) {
        return html_writer::tag('div', $content, $attributes);
    }
    protected static function span($attributes, $content) {
        return html_writer::tag('span', $content, $attributes);
    }

    protected static function ul($items) {
        $lis = array();
        foreach ($items as $key => $string) {
            $lis[] = "<li>$string</li>";
        }
        return '<ul class=unstyled>'.implode($lis).'</ul>';
    }
    public function action_icon($url, pix_icon $pixicon, component_action $action = null, array $attributes = null, $linktext=false) {
        if (!($url instanceof moodle_url)) {
            $url = new moodle_url($url);
        }
        $attributes = (array)$attributes;

        if (empty($attributes['class'])) {
            // let ppl override the class via $options
            $attributes['class'] = 'action-icon';
        }

        $icon = $this->render($pixicon);

        if ($linktext) {
            $text = $pixicon->attributes['alt'];
        } else {
            $text = '';
        }

        return $this->action_link($url, $text.$icon, $action, $attributes);
    }
    public function home_link() {
        global $CFG, $SITE;
        $text = '';
        $linktext = 'Moodle';

        if ($this->page->pagetype == 'site-index') {
            $div_attributes['class'] = "sitelink";
            $text = 'Made with ';
            $a_attributes['href'] = 'http://moodle.org/';
        } else if (!empty($CFG->target_release) &&
                $CFG->target_release != $CFG->release) {
            // Special case for during install/upgrade.
            $div_attributes['class'] = "sitelink";
            $text = 'help with ';
            $a_attributes['href'] = 'http://docs.moodle.org/en/Administrator_documentation';
            $a_attributes['target'] = '_blank';
        } else if ($this->page->course->id == $SITE->id ||
                strpos($this->page->pagetype, 'course-view') === 0) {
            $div_attributes['class'] = "homelink";
            $linktext = get_string('home');
            $a_attributes['href'] = $CFG->wwwroot . '/';
        } else {
            $div_attributes['class'] = "homelink";
            $linktext = format_string($this->page->course->shortname, true, array('context' => $this->page->context));
            $a_attributes['href'] = $CFG->wwwroot . '/course/view.php?id=' . $this->page->course->id;
        }
        return self::div($div_attributes, $text . self::a($a_attributes, $linktext));
    }

    protected function render_pix_icon(pix_icon $icon) {

        if (isset(self::$icons_ignore[$icon->pix])) {
            return parent::render_pix_icon($icon);
        } else if (isset(self::$icons[$icon->pix])) {
            return self::icon(self::$icons[$icon->pix]);
        } else {
            return parent::render_pix_icon($icon);
            //return '<i class=icon-not-assigned data-debug-icon="'.$icon->pix.'"></i>';
        }


    }
    protected function render_custom_menu(custom_menu $menu) {
        if (!$menu->has_children()) {
            return '';
        }
        $content  = '<div class="navbar navbar-fixed-top">' .
        '<div class=navbar-inner>' .
        '<div class=container>' .
        '<ul class=nav>';

        foreach ($menu->get_children() as $item) {
            $content .= $this->render_custom_menu_item($item);
        }
        $content .= '</ul></div></div><div>'; 
        return $content;
    }

    protected function render_custom_menu_item(custom_menu_item $menunode) {
        // Required to ensure we get unique trackable id's
        static $submenucount = 0;

        if ($menunode->has_children()) {
            $content = '<li class=dropdown>';
            // If the child has menus render it as a sub menu
            $submenucount++;
            if ($menunode->get_url() !== null) {
                $url = $menunode->get_url();
            } else {
                $url = '#cm_submenu_'.$submenucount;
            }

            //$content .= html_writer::link($url, $menunode->get_text(), array('title'=>,));
            $content .= '<a href="'.$url.'" class=dropdown-toggle data-toggle=dropdown>';
            $content .= $menunode->get_title();
            $content .= '<b class=caret></b></a>';
            $content .= '<ul class=dropdown-menu>';
            foreach ($menunode->get_children() as $menunode) {
                $content .= $this->render_custom_menu_item($menunode);
            }
            $content .= '</ul>';
        } else {
            $content = '<li>';
            // The node doesn't have children so produce a final menuitem

            if ($menunode->get_url() !== null) {
                $url = $menunode->get_url();
            } else {
                $url = '#';
            }
            $content .= html_writer::link($url, $menunode->get_text(), array('title'=>$menunode->get_title()));
        }
        $content .= '<li>';
        return $content;
    }
    public function block_controls($controls) {
        if (empty($controls)) {
            return '';
        }
        $controlshtml = array();
        foreach ($controls as $control) {
            $controlshtml[] = self::a(array('href'=>$control['url'], 'title'=>$control['caption']), self::moodle_icon($control['icon']));
        }
        return self::div(array('class'=>'commands'), implode($controlshtml));
    }

    public function list_block_contents($icons, $items) {
        return self::ul($items);
    }

    public function doc_link($path, $text = '') {
        $attributes['href'] = new moodle_url(get_docs_url($path));
        if ($text == '') {
            $linktext = $this->icon_help();
        } else {
            $linktext = $this->icon_help().' '.$text; }
        return self::a($attributes, $linktext);
    }

    public function icon_spacer(array $attributes = null, $br = false) {
        return self::icon('spacer', '');
        // don't output br's or attributes
    }
    public function error_text($message) {
        if (empty($message)) { return ''; }
        return self::span(array('class'=>'label label-important'), $message);
    }
    public function notification($message, $classes = 'notifyproblem') {
        // TODO rewrite recognized classnames to bootstrap alert equivalent 
        if ($classes = 'notifyproblem') { $classes = 'alert-error';}
        if ($classes = 'notifysuccess') { $classes = 'alert-success';}
        return self::div(array('class'=>'alert '.$classes), clean_text($message));
    }
    protected function render_paging_bar(paging_bar $pagingbar) {
        // this is more complicated than it needs to be, see MDL-35367 
        $pagingbar->maxdisplay = 11; // odd number for symmetry
        $pagingbar = clone($pagingbar);
        $pagingbar->prepare($this, $this->page, $this->target);
        $show_pagingbar = ($pagingbar->totalcount > $pagingbar->perpage);
        if ($show_pagingbar) {
            $baseurl = $pagingbar->baseurl;
            $pagevar = $pagingbar->pagevar;
            $maxdisplay = max($pagingbar->maxdisplay, 5);
            $page = $pagingbar->page;

            $output = '<div class="pagination pagination-centered"><ul>';

            // Note: page 0 is displayed to users as page 1 and so on.
            if ($pagingbar->perpage > 0) {
                $lastpage = floor($pagingbar->totalcount / $pagingbar->perpage);
            } else {
                $lastpage = 0;
            }
            if ($page != 0) {
                $previouslink = html_writer::link(new moodle_url($baseurl, array($pagevar=>$page-1)), get_string('previous'));
                $output .= "<li>$previouslink</li>";
            } else {
                $output .= '<li class=disabled><span>'.get_string('previous').'</span></li>';
            }

            $start = 0;
            $stop = $lastpage;
            $truncate = $lastpage + 1 > $maxdisplay ;
            $start_margin = floor($maxdisplay / 2);
            $end_margin = $lastpage - ceil($maxdisplay / 2);
            $near_to_start = $page < $start_margin;
            $near_to_end = $page > $end_margin;
            if ($truncate && $near_to_start) {
                $stop = $maxdisplay - 3;
            } else if ($truncate && $near_to_end) {
                $start = $lastpage - $maxdisplay + 3;
            } else if ($truncate) { // truncate both sides, centered on current page
                $before_current = ceil(($maxdisplay - 5) / 2) ;
                $start = $page - $before_current;
                $stop = $start + $maxdisplay - 5;
            }

            if ($truncate && !$near_to_start) {
                $link = html_writer::link(new moodle_url($baseurl, array($pagevar=>'0')), '1');
                $output .= "<li>$link</li>" . "<li class=disabled><span>…</span></li>";
            }

            for ($i = $start; $i <= $stop; $i++) {
                if ($page == $i) {
                    $pagename = $page + 1;
                    $output .= "<li class=active><span>$pagename</span></li>";
                } else {
                    $link = html_writer::link(new moodle_url($baseurl, array($pagevar=>$i)), $i+1);
                    $output .= "<li>$link</li>";
                }
            }

            if ($truncate && !$near_to_end) {
                $output .= "<li class=disabled><span>…</span>";
                $link = html_writer::link(new moodle_url($baseurl, array($pagevar=>$lastpage)), $lastpage + 1);
                $output .= "<li>$link</li>";
            }

            if ($page != $lastpage) {
                $nextlink = html_writer::link(new moodle_url($baseurl, array($pagevar=>$page+1)), get_string('next'));
                $output .= "<li>$nextlink</li>";
            } else {
                $output .= '<li class=disabled><span>'.get_string('next').'</span></li>';
            }

            return $output."</ul></div>";
        }
    }

    public function navbar() {
        $items = $this->page->navbar->get_items();
        $htmlblocks = array();
        //$divider = '<span class="divider">'.get_separator().'</span>';
        $divider = self::span(array('class'=>'divider'), '/');
        $navbarcontent = '<ul class=breadcrumb>';
        $itemcount = count($items);
        $lis = array();
        for ($i=1;$i <= $itemcount;$i++) {
            $item = $items[$i-1];
            $item->hideicon = true;
            if ($i===$itemcount) {
                $li= "<li>".$this->render($item)."</li>";
            } else {
                $li= "<li>".$this->render($item)." $divider</li>";
            }
            $lis[] = $li;
        }

        $navbarcontent .= join('', $lis).'</ul>';
        return $navbarcontent;
    }
    protected function render_single_button(single_button $button) {
        $attributes = array('type'     => 'submit',
                'class'    => 'btn',
                'value'    => $button->label,
                'disabled' => $button->disabled ? 'disabled' : null,
                'title'    => $button->tooltip);

        if ($button->actions) {
            $id = html_writer::random_id('single_button');
            $attributes['id'] = $id;
            foreach ($button->actions as $action) {
                $this->add_action_handler($action, $id);
            }
        }

        // first the input element
        $output = html_writer::empty_tag('input', $attributes);

        // then hidden fields
        $params = $button->url->params();
        if ($button->method === 'post') {
            $params['sesskey'] = sesskey();
        }
        foreach ($params as $var => $val) {
            $output .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => $var, 'value' => $val));
        }

        // then div wrapper for xhtml strictness
        $output = html_writer::tag('div', $output);

        // now the form itself around it
        if ($button->method === 'get') {
            $url = $button->url->out_omit_querystring(true); // url without params, the anchor part allowed
        } else {
            $url = $button->url->out_omit_querystring();     // url without params, the anchor part not allowed
        }
        if ($url === '') {
            $url = '#'; // there has to be always some action
        }
        $attributes = array('method' => $button->method,
                'class' => 'form-inline',
                'action' => $url,
                'id'     => $button->formid);
        $output = html_writer::tag('form', $output, $attributes);

        return self::div(array('class' => $button->class), $output);
    }
    protected function render_single_select(single_select $select) {
        $select = clone($select);
        if (empty($select->formid)) {
            $select->formid = html_writer::random_id('single_select_f');
        }
        $output = '';
        $params = $select->url->params();
        if ($select->method === 'post') {
            $params['sesskey'] = sesskey();
        }
        foreach ($params as $name=>$value) {
            $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>$name, 'value'=>$value));
        }

        if (empty($select->attributes['id'])) {
            $select->attributes['id'] = html_writer::random_id('single_select');
        }

        if ($select->disabled) {
            $select->attributes['disabled'] = 'disabled';
        }

        if ($select->tooltip) {
            $select->attributes['title'] = $select->tooltip;
        }

        if ($select->label) {
            $output .= html_writer::label($select->label, $select->attributes['id'], false, $select->labelattributes);
        }

        if ($select->helpicon instanceof help_icon) {
            $output .= $this->render($select->helpicon);
        } else if ($select->helpicon instanceof old_help_icon) {
            $output .= $this->render($select->helpicon);
        }
        $output .= html_writer::select($select->options, $select->name, $select->selected, $select->nothing, $select->attributes);

        $go = html_writer::empty_tag('input', array('type'=>'submit', 'value'=>get_string('go')));
        $output .= html_writer::tag('noscript', $go);

        $nothing = empty($select->nothing) ? false : key($select->nothing);
        $this->page->requires->js_init_call('M.util.init_select_autosubmit', array($select->formid, $select->attributes['id'], $nothing));

        // then div wrapper for xhtml strictness
        $output = html_writer::tag('div', $output);

        // now the form itself around it
        if ($select->method === 'get') {
            $url = $select->url->out_omit_querystring(true); // url without params, the anchor part allowed
        } else {
            $url = $select->url->out_omit_querystring();     // url without params, the anchor part not allowed
        }
        $formattributes = array('method' => $select->method,
                'class' => 'form-inline',
                'action' => $url,
                'id'     => $select->formid);
        $output = html_writer::tag('form', $output, $formattributes);

        // and finally one more wrapper with class
        return self::div(array('class' => $select->class), $output);
    }
    protected function init_block_hider_js(block_contents $bc) { }

}

    include_once($CFG->dirroot . "/admin/renderer.php");
class theme_bootstrap_core_admin_renderer extends core_admin_renderer {
         
    /**
     * Display the 'Do you acknowledge the terms of the GPL' page. The first page
     * during install.
     * @return string HTML to output.
     */
    public function install_licence_page() {
        global $CFG;
        $output = '';

        $copyrightnotice = text_to_html(get_string('gpl3'));
        $copyrightnotice = str_replace('target="_blank"', 'onclick="this.target=\'_blank\'"', $copyrightnotice); // extremely ugly validation hack

        $continue = new single_button(new moodle_url('/admin/index.php', array('lang'=>$CFG->lang, 'agreelicense'=>1)), get_string('continue'), 'get');

        $output .= $this->header();
        $output .= $this->heading('<a href="http://moodle.org">Moodle</a> - Modular Object-Oriented Dynamic Learning Environment');
        $output .= $this->heading(get_string('copyrightnotice'));
        $output .= $this->box($copyrightnotice, 'copyrightnotice');
        $output .= html_writer::empty_tag('br');
        $output .= $this->confirm(get_string('doyouagree'), $continue, "http://docs.moodle.org/dev/License");
        $output .= $this->footer();

        return $output;
    }

    /**
     * Display page explaining proper upgrade process,
     * there can not be any PHP file leftovers...
     *
     * @return string HTML to output.
     */
    public function upgrade_stale_php_files_page() {
        $output = '';
        $output .= $this->header();
        $output .= $this->heading(get_string('upgradestalefiles', 'admin'));
        $output .= $this->box_start('generalbox', 'notice');
        $output .= format_text(get_string('upgradestalefilesinfo', 'admin', get_docs_url('Upgrading')), FORMAT_MARKDOWN);
        $output .= html_writer::empty_tag('br');
        $output .= html_writer::tag('div', $this->single_button($this->page->url, get_string('reload'), 'get'), array('class' => 'buttons'));
        $output .= $this->box_end();
        $output .= $this->footer();

        return $output;
    }

    /**
     * Display the 'environment check' page that is displayed during install.
     * @param int $maturity
     * @param boolean $envstatus final result of the check (true/false)
     * @param array $environment_results array of results gathered
     * @param string $release moodle release
     * @return string HTML to output.
     */
    public function install_environment_page($maturity, $envstatus, $environment_results, $release) {
        global $CFG;
        $output = '';

        $output .= $this->header();
        $output .= $this->maturity_warning($maturity);
        $output .= $this->heading("Moodle $release");
        $output .= $this->release_notes_link();

        $output .= $this->environment_check_table($envstatus, $environment_results);

        if (!$envstatus) {
            $output .= $this->upgrade_reload(new moodle_url('/admin/index.php', array('agreelicense' => 1, 'lang' => $CFG->lang)));
        } else {
            $output .= $this->notification(get_string('environmentok', 'admin'), 'notifysuccess');
            $output .= $this->continue_button(new moodle_url('/admin/index.php', array('agreelicense'=>1, 'confirmrelease'=>1, 'lang'=>$CFG->lang)));
        }

        $output .= $this->footer();
        return $output;
    }

    /**
     * Displays the list of plugins with unsatisfied dependencies
     *
     * @param double|string|int $version Moodle on-disk version
     * @param array $failed list of plugins with unsatisfied dependecies
     * @param moodle_url $reloadurl URL of the page to recheck the dependencies
     * @return string HTML
     */
    public function unsatisfied_dependencies_page($version, array $failed, moodle_url $reloadurl) {
        $output = '';

        $output .= $this->header();
        $output .= $this->heading(get_string('pluginscheck', 'admin'));
        $output .= $this->warning(get_string('pluginscheckfailed', 'admin', array('pluginslist' => implode(', ', array_unique($failed)))));
        $output .= $this->plugins_check_table(plugin_manager::instance(), $version, array('xdep' => true));
        $output .= $this->warning(get_string('pluginschecktodo', 'admin'));
        $output .= $this->continue_button($reloadurl);

        $output .= $this->footer();

        return $output;
    }

    /**
     * Display the 'You are about to upgrade Moodle' page. The first page
     * during upgrade.
     * @param string $strnewversion
     * @param int $maturity
     * @return string HTML to output.
     */
    public function upgrade_confirm_page($strnewversion, $maturity) {
        $output = '';

        $continueurl = new moodle_url('index.php', array('confirmupgrade' => 1));
        $cancelurl = new moodle_url('index.php');

        $output .= $this->header();
        $output .= $this->maturity_warning($maturity);
        $output .= $this->confirm(get_string('upgradesure', 'admin', $strnewversion), $continueurl, $cancelurl);
        $output .= $this->footer();

        return $output;
    }

    /**
     * Display the environment page during the upgrade process.
     * @param string $release
     * @param boolean $envstatus final result of env check (true/false)
     * @param array $environment_results array of results gathered
     * @return string HTML to output.
     */
    public function upgrade_environment_page($release, $envstatus, $environment_results) {
        global $CFG;
        $output = '';

        $output .= $this->header();
        $output .= $this->heading("Moodle $release");
        $output .= $this->release_notes_link();
        $output .= $this->environment_check_table($envstatus, $environment_results);

        if (!$envstatus) {
            $output .= $this->upgrade_reload(new moodle_url('/admin/index.php'), array('confirmupgrade' => 1));

        } else {
            $output .= $this->notification(get_string('environmentok', 'admin'), 'notifysuccess');

            if (empty($CFG->skiplangupgrade) and current_language() !== 'en') {
                $output .= $this->box(get_string('langpackwillbeupdated', 'admin'), 'generalbox', 'notice');
            }

            $output .= $this->continue_button(new moodle_url('/admin/index.php', array('confirmupgrade' => 1, 'confirmrelease' => 1)));
        }

        $output .= $this->footer();

        return $output;
    }

    /**
     * Display the upgrade page that lists all the plugins that require attention.
     * @param plugin_manager $pluginman provides information about the plugins.
     * @param available_update_checker $checker provides information about available updates.
     * @param int $version the version of the Moodle code from version.php.
     * @param bool $showallplugins
     * @param moodle_url $reloadurl
     * @param moodle_url $continueurl
     * @return string HTML to output.
     */
    public function upgrade_plugin_check_page(plugin_manager $pluginman, available_update_checker $checker,
            $version, $showallplugins, $reloadurl, $continueurl) {
        global $CFG;

        $output = '';

        $output .= $this->header();
        $output .= $this->box_start('generalbox');
        $output .= $this->container_start('generalbox', 'notice');
        $output .= html_writer::tag('p', get_string('pluginchecknotice', 'core_plugin'));
        if (empty($CFG->disableupdatenotifications)) {
            $output .= $this->container_start('checkforupdates');
            $output .= $this->single_button(new moodle_url($reloadurl, array('fetchupdates' => 1)), get_string('checkforupdates', 'core_plugin'));
            if ($timefetched = $checker->get_last_timefetched()) {
                $output .= $this->container(get_string('checkforupdateslast', 'core_plugin',
                    userdate($timefetched, get_string('strftimedatetime', 'core_langconfig'))));
            }
            $output .= $this->container_end();
        }
        $output .= $this->container_end();

        $output .= $this->plugins_check_table($pluginman, $version, array('full' => $showallplugins));
        $output .= $this->box_end();
        $output .= $this->upgrade_reload($reloadurl);

        if ($pluginman->some_plugins_updatable()) {
            $output .= $this->container_start('upgradepluginsinfo');
            $output .= $this->help_icon('upgradepluginsinfo', 'core_admin', get_string('upgradepluginsfirst', 'core_admin'));
            $output .= $this->container_end();
        }

        $button = new single_button($continueurl, get_string('upgradestart', 'admin'), 'get');
        $button->class = 'continuebutton';
        $output .= $this->render($button);
        $output .= $this->footer();

        return $output;
    }


    /**
     * Output a warning message, of the type that appears on the admin notifications page.
     * @param string $message the message to display.
     * @param string $type type class
     * @return string HTML to output.
     */
    protected function warning($message, $type = '') {
        if ($type == 'error') { $type = ' alert-error';}
        return html_writer::tag('div', $message, array('class'=>('alert' . $type)));
    }


    /**
     * Display a warning about installing development code if necesary.
     * @param int $maturity
     * @return string HTML to output.
     */
    protected function maturity_warning($maturity) {
        if ($maturity == MATURITY_STABLE) {
            return ''; // No worries.
        }

        $maturitylevel = get_string('maturity' . $maturity, 'admin');
        return html_writer::tag('div',
                    $this->container(get_string('maturitycorewarning', 'admin', $maturitylevel)) .
                    $this->container($this->doc_link('admin/versions', get_string('morehelp'))),
                'alert maturitywarning');
    }

    /**
     * Output the copyright notice.
     * @return string HTML to output.
     */
    protected function moodle_copyright() {
        global $CFG;

        //////////////////////////////////////////////////////////////////////////////////////////////////
        ////  IT IS ILLEGAL AND A VIOLATION OF THE GPL TO HIDE, REMOVE OR MODIFY THIS COPYRIGHT NOTICE ///
        $copyrighttext = '<p><a href="http://moodle.org/">Moodle</a> '.
                         '<a href="http://docs.moodle.org/dev/Releases" title="'.$CFG->version.'">'.$CFG->release.'</a></p>'.
                         '<p>Copyright &copy; 1999 onwards, Martin Dougiamas '.
                         'and <a href="http://docs.moodle.org/dev/Credits">many other contributors</a>.</p>'.
                         '<p><a href="http://docs.moodle.org/dev/License">GNU Public License</a><p>';
        //////////////////////////////////////////////////////////////////////////////////////////////////
        return html_writer::tag('div', $copyrighttext, array('class'=>'alert alert-info copyright'));
    }

    /**
     * Display a warning about installing development code if necesary.
     * @param int $maturity
     * @return string HTML to output.
     */
    protected function maturity_info($maturity) {
        if ($maturity == MATURITY_STABLE) {
            return ''; // No worries.
        }

        $maturitylevel = get_string('maturity' . $maturity, 'admin');
        return $this->box(
                    get_string('maturitycoreinfo', 'admin', $maturitylevel) . ' ' .
                    $this->doc_link('admin/versions', get_string('morehelp')),
                'alert maturityinfo maturity'.$maturity);
    }

    /**
     * Displays the info about available Moodle updates
     *
     * @param array|null $updates array of available_update_info objects or null
     * @param int|null $fetch timestamp of the most recent updates fetch or null (unknown)
     * @return string
     */
    protected function available_updates($updates, $fetch) {

        $updateinfo = $this->box_start('alert alert-info availableupdatesinfo');
        if (is_array($updates)) {
            $updateinfo .= $this->heading(get_string('updateavailable', 'core_admin'), 3);
            foreach ($updates as $update) {
                $updateinfo .= $this->moodle_available_update_info($update);
            }
        } else {
            $now = time();
            if ($fetch and ($fetch <= $now) and ($now - $fetch < HOURSECS)) {
                $updateinfo .= $this->heading(get_string('updateavailablenot', 'core_admin'), 3);
            }
        }

        $updateinfo .= $this->container_start('checkforupdates');
        $updateinfo .= $this->single_button(new moodle_url($this->page->url, array('fetchupdates' => 1)), get_string('checkforupdates', 'core_plugin'));
        if ($fetch) {
            $updateinfo .= $this->container(get_string('checkforupdateslast', 'core_plugin',
                userdate($fetch, get_string('strftimedatetime', 'core_langconfig'))));
        }
        $updateinfo .= $this->container_end();

        $updateinfo .= $this->box_end();

        return $updateinfo;
    }


    function upgrade_reload($url) {
        return '<div><a class=btn href="' . $url. '"><i class=icon-refresh></i> ' . get_string('reload') . '</a></div>';
    }

    /**
     * Displays all known plugins and information about their installation or upgrade
     *
     * This default implementation renders all plugins into one big table. The rendering
     * options support:
     *     (bool)full = false: whether to display up-to-date plugins, too
     *     (bool)xdep = false: display the plugins with unsatisified dependecies only
     *
     * @param plugin_manager $pluginman provides information about the plugins.
     * @param int $version the version of the Moodle code from version.php.
     * @param array $options rendering options
     * @return string HTML code
     */
    public function plugins_check_table(plugin_manager $pluginman, $version, array $options = array()) {
        global $CFG;

        $plugininfo = $pluginman->get_plugins();

        if (empty($plugininfo)) {
            return '';
        }

        $options['full'] = isset($options['full']) ? (bool)$options['full'] : false;
        $options['xdep'] = isset($options['xdep']) ? (bool)$options['xdep'] : false;

        $table = new html_table();
        $table->id = 'plugins-check';
        $table->head = array(
            get_string('displayname', 'core_plugin'),
            get_string('rootdir', 'core_plugin'),
            get_string('source', 'core_plugin'),
            get_string('versiondb', 'core_plugin'),
            get_string('versiondisk', 'core_plugin'),
            get_string('requires', 'core_plugin'),
            get_string('status', 'core_plugin'),
        );
        $table->colclasses = array(
            'displayname', 'rootdir', 'source', 'versiondb', 'versiondisk', 'requires', 'status',
        );
        $table->data = array();

        $numofhighlighted = array();    // number of highlighted rows per this subsection

        foreach ($plugininfo as $type => $plugins) {

            $header = new html_table_cell($pluginman->plugintype_name_plural($type));
            $header->header = true;
            $header->colspan = count($table->head);
            $header = new html_table_row(array($header));
            $header->attributes['class'] = 'plugintypeheader type-' . $type;

            $numofhighlighted[$type] = 0;

            if (empty($plugins) and $options['full']) {
                $msg = new html_table_cell(get_string('noneinstalled', 'core_plugin'));
                $msg->colspan = count($table->head);
                $row = new html_table_row(array($msg));
                $row->attributes['class'] .= 'warning msg-noneinstalled';
                $table->data[] = $header;
                $table->data[] = $row;
                continue;
            }

            $plugintyperows = array();

            foreach ($plugins as $name => $plugin) {
                $row = new html_table_row();
                $row->attributes['class'] = 'type-' . $plugin->type . ' name-' . $plugin->type . '_' . $plugin->name;

                if ($this->page->theme->resolve_image_location('icon', $plugin->type . '_' . $plugin->name)) {
                    $icon = $this->output->pix_icon('icon', '', $plugin->type . '_' . $plugin->name, array('class' => 'smallicon pluginicon'));
                } else {
                    //$icon = this::icon_spacer();
                }
                $displayname  = $icon . ' ' . $plugin->displayname;
                $displayname = new html_table_cell($displayname);

                $rootdir = new html_table_cell($plugin->get_dir());

                if ($isstandard = $plugin->is_standard()) {
                    $row->attributes['class'] .= ' standard';
                    $source = new html_table_cell(get_string('sourcestd', 'core_plugin'));
                } else {
                    $row->attributes['class'] .= ' extension';
                    $source = new html_table_cell(get_string('sourceext', 'core_plugin'));
                }

                $versiondb = new html_table_cell($plugin->versiondb);
                $versiondisk = new html_table_cell($plugin->versiondisk);

                $statuscode = $plugin->get_status();
                $row->attributes['class'] .= ' status-' . $statuscode;
                $status = get_string('status_' . $statuscode, 'core_plugin');

                $availableupdates = $plugin->available_updates();
                if (!empty($availableupdates) and empty($CFG->disableupdatenotifications)) {
                    foreach ($availableupdates as $availableupdate) {
                        $status .= $this->plugin_available_update_info($availableupdate);
                    }
                }

                $status = new html_table_cell($status);

                $requires = new html_table_cell($this->required_column($plugin, $pluginman, $version));

                $statusisboring = in_array($statuscode, array(
                        plugin_manager::PLUGIN_STATUS_NODB, plugin_manager::PLUGIN_STATUS_UPTODATE));

                $coredependency = $plugin->is_core_dependency_satisfied($version);
                $otherpluginsdependencies = $pluginman->are_dependencies_satisfied($plugin->get_other_required_plugins());
                $dependenciesok = $coredependency && $otherpluginsdependencies;

                if ($options['xdep']) {
                    // we want to see only plugins with failed dependencies
                    if ($dependenciesok) {
                        continue;
                    }

                } else if ($isstandard and $statusisboring and $dependenciesok and empty($availableupdates)) {
                    // no change is going to happen to the plugin - display it only
                    // if the user wants to see the full list
                    if (empty($options['full'])) {
                        continue;
                    }
                }

                // ok, the plugin should be displayed
                $numofhighlighted[$type]++;

                $row->cells = array($displayname, $rootdir, $source,
                    $versiondb, $versiondisk, $requires, $status);
                $plugintyperows[] = $row;
            }

            if (empty($numofhighlighted[$type]) and empty($options['full'])) {
                continue;
            }

            $table->data[] = $header;
            $table->data = array_merge($table->data, $plugintyperows);
        }

        $sumofhighlighted = array_sum($numofhighlighted);

        if ($options['xdep']) {
            // we do not want to display no heading and links in this mode
            $out = '';

        } else if ($sumofhighlighted == 0) {
            $out  = $this->output->container_start('nonehighlighted', 'plugins-check-info');
            $out .= $this->output->heading(get_string('nonehighlighted', 'core_plugin'));
            if (empty($options['full'])) {
                $out .= html_writer::link(new moodle_url('/admin/index.php',
                    array('confirmupgrade' => 1, 'confirmrelease' => 1, 'showallplugins' => 1)),
                    get_string('nonehighlightedinfo', 'core_plugin'));
            }
            $out .= $this->output->container_end();

        } else {
            $out  = $this->output->container_start('somehighlighted', 'plugins-check-info');
            $out .= $this->output->heading(get_string('somehighlighted', 'core_plugin', $sumofhighlighted));
            if (empty($options['full'])) {
                $out .= html_writer::link(new moodle_url('/admin/index.php',
                    array('confirmupgrade' => 1, 'confirmrelease' => 1, 'showallplugins' => 1)),
                    get_string('somehighlightedinfo', 'core_plugin'));
            } else {
                $out .= html_writer::link(new moodle_url('/admin/index.php',
                    array('confirmupgrade' => 1, 'confirmrelease' => 1, 'showallplugins' => 0)),
                    get_string('somehighlightedonly', 'core_plugin'));
            }
            $out .= $this->output->container_end();
        }

        if ($sumofhighlighted > 0 or $options['full']) {
            $out .= html_writer::table($table);
        }

        return $out;
    }

    /**
     * Formats the information that needs to go in the 'Requires' column.
     * @param plugininfo_base $plugin the plugin we are rendering the row for.
     * @param plugin_manager $pluginman provides data on all the plugins.
     * @param string $version
     * @return string HTML code
     */
    protected function required_column(plugininfo_base $plugin, plugin_manager $pluginman, $version) {
        $requires = array();

        if (!empty($plugin->versionrequires)) {
            if ($plugin->versionrequires <= $version) {
                $class = 'requires-ok';
            } else {
                $class = 'requires-failed';
            }
            $requires[] = html_writer::tag('li',
                get_string('moodleversion', 'core_plugin', $plugin->versionrequires),
                array('class' => $class));
        }

        foreach ($plugin->get_other_required_plugins() as $component => $requiredversion) {
            $ok = true;
            $otherplugin = $pluginman->get_plugin_info($component);

            if (is_null($otherplugin)) {
                $ok = false;
            } else if ($requiredversion != ANY_VERSION and $otherplugin->versiondisk < $requiredversion) {
                $ok = false;
            }

            if ($ok) {
                $class = 'requires-ok';
            } else {
                $class = 'requires-failed';
            }

            if ($requiredversion != ANY_VERSION) {
                $str = 'otherpluginversion';
            } else {
                $str = 'otherplugin';
            }
            $requires[] = html_writer::tag('li',
                    get_string($str, 'core_plugin',
                            array('component' => $component, 'version' => $requiredversion)),
                    array('class' => $class));
        }

        if (!$requires) {
            return '';
        }
        return html_writer::tag('ul', implode("\n", $requires));
    }

    /**
     * Prints an overview about the plugins - number of installed, number of extensions etc.
     *
     * @param plugin_manager $pluginman provides information about the plugins
     * @return string as usually
     */
    public function plugins_overview_panel(plugin_manager $pluginman) {
        global $CFG;

        $plugininfo = $pluginman->get_plugins();

        $numtotal = $numdisabled = $numextension = $numupdatable = 0;

        foreach ($plugininfo as $type => $plugins) {
            foreach ($plugins as $name => $plugin) {
                if ($plugin->get_status() === plugin_manager::PLUGIN_STATUS_MISSING) {
                    continue;
                }
                $numtotal++;
                if ($plugin->is_enabled() === false) {
                    $numdisabled++;
                }
                if (!$plugin->is_standard()) {
                    $numextension++;
                }
                if (empty($CFG->disableupdatenotifications) and $plugin->available_updates()) {
                    $numupdatable++;
                }
            }
        }

        $info = array();
        $info[] = html_writer::tag('span', get_string('numtotal', 'core_plugin', $numtotal), array('class' => 'info total'));
        $info[] = html_writer::tag('span', get_string('numdisabled', 'core_plugin', $numdisabled), array('class' => 'info disabled'));
        $info[] = html_writer::tag('span', get_string('numextension', 'core_plugin', $numextension), array('class' => 'info extension'));
        if ($numupdatable > 0) {
            $info[] = html_writer::tag('span', get_string('numupdatable', 'core_plugin', $numupdatable), array('class' => 'info updatable'));
        }

        return $this->output->box(implode(html_writer::tag('span', ' ', array('class' => 'separator')), $info), '', 'plugins-overview-panel');
    }

    /**
     * Displays all known plugins and links to manage them
     *
     * This default implementation renders all plugins into one big table.
     *
     * @param plugin_manager $pluginman provides information about the plugins.
     * @return string HTML code
     */
    public function plugins_control_panel(plugin_manager $pluginman) {
        global $CFG;

        $plugininfo = $pluginman->get_plugins();

        if (empty($plugininfo)) {
            return '';
        }

        $table = new html_table();
        $table->id = 'plugins-control-panel';
        $table->head = array(
            get_string('displayname', 'core_plugin'),
            get_string('source', 'core_plugin'),
            get_string('version', 'core_plugin'),
            get_string('availability', 'core_plugin'),
            get_string('actions', 'core_plugin'),
            get_string('notes','core_plugin'),
        );
        $table->colclasses = array(
            'pluginname', 'source', 'version', 'availability', 'actions', 'notes'
        );

        foreach ($plugininfo as $type => $plugins) {

            $header = new html_table_cell($pluginman->plugintype_name_plural($type));
            $header->header = true;
            $header->colspan = count($table->head);
            $header = new html_table_row(array($header));
            $header->attributes['class'] = 'plugintypeheader type-' . $type;
            $table->data[] = $header;

            if (empty($plugins)) {
                $msg = new html_table_cell(get_string('noneinstalled', 'core_plugin'));
                $msg->colspan = count($table->head);
                $row = new html_table_row(array($msg));
                $row->attributes['class'] .= 'msg msg-noneinstalled';
                $table->data[] = $row;
                continue;
            }

            foreach ($plugins as $name => $plugin) {
                $row = new html_table_row();
                $row->attributes['class'] = 'type-' . $plugin->type . ' name-' . $plugin->type . '_' . $plugin->name;

                if ($this->page->theme->resolve_image_location('icon', $plugin->type . '_' . $plugin->name)) {
                    $icon = $this->output->pix_icon('icon', '', $plugin->type . '_' . $plugin->name, array('class' => 'smallicon pluginicon'));
                } else {
                    $icon = $this->output->pix_icon('spacer', '', 'moodle', array('class' => 'smallicon pluginicon noicon'));
                }
                if ($plugin->get_status() === plugin_manager::PLUGIN_STATUS_MISSING) {
                    $msg = html_writer::tag('span', get_string('status_missing', 'core_plugin'), array('class' => 'notifyproblem'));
                    $row->attributes['class'] .= ' missingfromdisk';
                } else {
                    $msg = '';
                }
                $pluginname  = html_writer::tag('div', $icon . ' ' . $plugin->displayname . ' ' . $msg, array('class' => 'displayname')).
                               html_writer::tag('div', $plugin->component, array('class' => 'componentname'));
                $pluginname  = new html_table_cell($pluginname);

                if ($plugin->is_standard()) {
                    $row->attributes['class'] .= ' standard';
                    $source = new html_table_cell(get_string('sourcestd', 'core_plugin'));
                } else {
                    $row->attributes['class'] .= ' extension';
                    $source = new html_table_cell(get_string('sourceext', 'core_plugin'));
                }

                $version = new html_table_cell($plugin->versiondb);

                $isenabled = $plugin->is_enabled();
                if (is_null($isenabled)) {
                    $availability = new html_table_cell('');
                } else if ($isenabled) {
                    $row->attributes['class'] .= ' enabled';
                    $icon = $this->output->pix_icon('i/hide', get_string('pluginenabled', 'core_plugin'));
                    $availability = new html_table_cell($icon . ' ' . get_string('pluginenabled', 'core_plugin'));
                } else {
                    $row->attributes['class'] .= ' disabled';
                    $icon = $this->output->pix_icon('i/show', get_string('plugindisabled', 'core_plugin'));
                    $availability = new html_table_cell($icon . ' ' . get_string('plugindisabled', 'core_plugin'));
                }

                $actions = array();

                $settingsurl = $plugin->get_settings_url();
                if (!is_null($settingsurl)) {
                    $actions[] = html_writer::link($settingsurl, get_string('settings', 'core_plugin'), array('class' => 'settings'));
                }

                $uninstallurl = $plugin->get_uninstall_url();
                if (!is_null($uninstallurl)) {
                    $actions[] = html_writer::link($uninstallurl, get_string('uninstall', 'core_plugin'), array('class' => 'uninstall'));
                }

                $actions = new html_table_cell(implode(html_writer::tag('span', ' ', array('class' => 'separator')), $actions));

                $requriedby = $pluginman->other_plugins_that_require($plugin->component);
                if ($requriedby) {
                    $requiredby = html_writer::tag('div', get_string('requiredby', 'core_plugin', implode(', ', $requriedby)),
                        array('class' => 'requiredby'));
                } else {
                    $requiredby = '';
                }

                $updateinfo = '';
                if (empty($CFG->disableupdatenotifications) and is_array($plugin->available_updates())) {
                    foreach ($plugin->available_updates() as $availableupdate) {
                        $updateinfo .= $this->plugin_available_update_info($availableupdate);
                    }
                }

                $notes = new html_table_cell($requiredby.$updateinfo);

                $row->cells = array(
                    $pluginname, $source, $version, $availability, $actions, $notes
                );
                $table->data[] = $row;
            }
        }

        return html_writer::table($table);
    }

    /**
     * Helper method to render the information about the available plugin update
     *
     * The passed objects always provides at least the 'version' property containing
     * the (higher) version of the plugin available.
     *
     * @param available_update_info $updateinfo information about the available update for the plugin
     */
    protected function plugin_available_update_info(available_update_info $updateinfo) {

        $boxclasses = 'pluginupdateinfo';
        $info = array();

        if (isset($updateinfo->release)) {
            $info[] = html_writer::tag('span', get_string('updateavailable_release', 'core_plugin', $updateinfo->release),
                array('class' => 'info release'));
        }

        if (isset($updateinfo->maturity)) {
            $info[] = html_writer::tag('span', get_string('maturity'.$updateinfo->maturity, 'core_admin'),
                array('class' => 'info maturity'));
            $boxclasses .= ' maturity'.$updateinfo->maturity;
        }

        if (isset($updateinfo->download)) {
            $info[] = html_writer::link($updateinfo->download, get_string('download'), array('class' => 'info download'));
        }

        if (i…