Proyectos de Subversion Moodle

<?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/>.

/**

 * Renderer outputting the quiz editing UI.

 *

 * @package mod_quiz

 * @copyright 2013 The Open University.

 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

namespace mod_quiz\output;

use core_question\local\bank\question_version_status;

use mod_quiz\question\bank\qbank_helper;

use \mod_quiz\structure;

use \html_writer;

use qbank_previewquestion\question_preview_options;

use renderable;

/**

 * Renderer outputting the quiz editing UI.

 *

 * @copyright 2013 The Open University.

 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 * @since Moodle 2.7

 */

class edit_renderer extends \plugin_renderer_base {

    /** @var string The toggle group name of the checkboxes for the toggle-all functionality. */

    protected $togglegroup = 'quiz-questions';

    /**

     * Render the edit page

     *

     * @param \mod_quiz\quiz_settings $quizobj object containing all the quiz settings information.

     * @param structure $structure object containing the structure of the quiz.

     * @param \core_question\local\bank\question_edit_contexts $contexts the relevant question bank contexts.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @param array $pagevars the variables from {@link question_edit_setup()}.

     * @return string HTML to output.

     */

    public function edit_page(\mod_quiz\quiz_settings $quizobj, structure $structure,

        \core_question\local\bank\question_edit_contexts $contexts, \moodle_url $pageurl, array $pagevars) {

        $output = '';

        // Page title.

        $output .= $this->heading(get_string('questions', 'quiz'));

        // Information at the top.

        $output .= $this->quiz_state_warnings($structure);

        $output .= html_writer::start_div('mod_quiz-edit-top-controls');

        $output .= html_writer::start_div('d-flex justify-content-between flex-wrap mb-1');

        $output .= html_writer::start_div('d-flex align-items-center justify-content-around');

        $output .= $this->quiz_information($structure);

        $output .= html_writer::end_tag('div');

        $output .= $this->maximum_grade_input($structure, $pageurl);

        $output .= html_writer::end_tag('div');

        $output .= html_writer::start_div('d-flex justify-content-between flex-wrap mb-1');

        $output .= html_writer::start_div('mod_quiz-edit-action-buttons btn-group edit-toolbar', ['role' => 'group']);

        $output .= $this->repaginate_button($structure, $pageurl);

        $output .= $this->selectmultiple_button($structure);

        $output .= html_writer::end_tag('div');

        $output .= html_writer::start_div('d-flex flex-column justify-content-around');

        $output .= $this->total_marks($quizobj->get_quiz());

        $output .= html_writer::end_tag('div');

        $output .= html_writer::end_tag('div');

        $output .= $this->selectmultiple_controls($structure);

        $output .= html_writer::end_tag('div');

        // Show the questions organised into sections and pages.

        $output .= $this->start_section_list($structure);

        foreach ($structure->get_sections() as $section) {

            $output .= $this->start_section($structure, $section);

            $output .= $this->questions_in_section($structure, $section, $contexts, $pagevars, $pageurl);

            if ($structure->is_last_section($section)) {

                $output .= \html_writer::start_div('last-add-menu');

                $output .= html_writer::tag('span', $this->add_menu_actions($structure, 0,

                        $pageurl, $contexts, $pagevars), ['class' => 'add-menu-outer']);

                $output .= \html_writer::end_div();

            }

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

        }

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

        // Initialise the JavaScript.

        $this->initialise_editing_javascript($structure, $contexts, $pagevars, $pageurl);

        // Include the contents of any other popups required.

        if ($structure->can_be_edited()) {

            $thiscontext = $contexts->lowest();

            $this->page->requires->js_call_amd('mod_quiz/modal_quiz_question_bank', 'init', [

                $thiscontext->id

            ]);

            $this->page->requires->js_call_amd('mod_quiz/modal_add_random_question', 'init', [

                $thiscontext->id,

                $pagevars['cat'],

                $pageurl->out_as_local_url(true),

                $pageurl->param('cmid'),

                \core\plugininfo\qbank::is_plugin_enabled(\qbank_managecategories\helper::PLUGINNAME),

            ]);

            // Include the question chooser.

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

        }

        return $output;

    }

    /**

     * Render any warnings that might be required about the state of the quiz,

     * e.g. if it has been attempted, or if the shuffle questions option is

     * turned on.

     *

     * @param structure $structure the quiz structure.

     * @return string HTML to output.

     */

    public function quiz_state_warnings(structure $structure) {

        $warnings = $structure->get_edit_page_warnings();

        if (empty($warnings)) {

            return '';

        }

        $output = [];

        foreach ($warnings as $warning) {

            $output[] = \html_writer::tag('p', $warning);

        }

        return $this->box(implode("\n", $output), 'statusdisplay');

    }

    /**

     * Render the status bar.

     *

     * @param structure $structure the quiz structure.

     * @return string HTML to output.

     */

    public function quiz_information(structure $structure) {

        list($currentstatus, $explanation) = $structure->get_dates_summary();

        $output = html_writer::span(

                    get_string('numquestionsx', 'quiz', $structure->get_question_count()),

                    'numberofquestions') . ' | ' .

                html_writer::span($currentstatus, 'quizopeningstatus',

                    ['title' => $explanation]);

        return html_writer::div($output, 'statusbar');

    }

    /**

     * Render the form for setting a quiz' overall grade

     *

     * @param structure $structure the quiz structure.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @return string HTML to output.

     */

    public function maximum_grade_input($structure, \moodle_url $pageurl) {

        $output = '';

        $output .= html_writer::start_div('maxgrade', ['class' => 'mt-2 mt-sm-0']);

        $output .= html_writer::start_tag('form', ['method' => 'post', 'action' => 'edit.php',

                'class' => 'quizsavegradesform']);

        $output .= html_writer::start_tag('fieldset', ['class' => 'invisiblefieldset d-flex align-items-center']);

        $output .= html_writer::empty_tag('input', ['type' => 'hidden', 'name' => 'sesskey', 'value' => sesskey()]);

        $output .= html_writer::input_hidden_params($pageurl);

        $output .= html_writer::tag('label', get_string('maximumgrade') . ' ',

                ['for' => 'inputmaxgrade', 'class' => 'd-inline-block w-auto mb-0']);

        $output .= html_writer::empty_tag('input', ['type' => 'text', 'id' => 'inputmaxgrade',

                'name' => 'maxgrade', 'size' => ($structure->get_decimal_places_for_grades() + 2),

                'value' => $structure->formatted_quiz_grade(),

                'class' => 'form-control d-inline-block align-middle w-auto ml-1']);

        $output .= html_writer::empty_tag('input', ['type' => 'submit', 'class' => 'btn btn-secondary ml-1 d-inline-block w-auto ',

                'name' => 'savechanges', 'value' => get_string('save', 'quiz')]);

        $output .= html_writer::end_tag('fieldset');

        $output .= html_writer::end_tag('form');

        $output .= html_writer::end_tag('div');

        return $output;

    }

    /**

     * Return the repaginate button

     * @param structure $structure the structure of the quiz being edited.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @return string HTML to output.

     */

    protected function repaginate_button(structure $structure, \moodle_url $pageurl) {

        $header = html_writer::tag('span', get_string('repaginatecommand', 'quiz'), ['class' => 'repaginatecommand']);

        $form = $this->repaginate_form($structure, $pageurl);

        $buttonoptions = [

            'type'  => 'submit',

            'name'  => 'repaginate',

            'id'    => 'repaginatecommand',

            'value' => get_string('repaginatecommand', 'quiz'),

            'class' => 'btn btn-secondary mr-1',

            'data-header' => $header,

            'data-form'   => $form,

        ];

        if (!$structure->can_be_repaginated()) {

            $buttonoptions['disabled'] = 'disabled';

        } else {

            $this->page->requires->js_call_amd('mod_quiz/repaginate', 'init');

        }

        return html_writer::empty_tag('input', $buttonoptions);

    }

    /**

     * Generate the bulk action button.

     *

     * @param structure $structure the structure of the quiz being edited.

     * @return string HTML to output.

     */

    protected function selectmultiple_button(structure $structure) {

        $buttonoptions = [

            'type'  => 'button',

            'name'  => 'selectmultiple',

            'id'    => 'selectmultiplecommand',

            'value' => get_string('selectmultipleitems', 'quiz'),

            'class' => 'btn btn-secondary'

        ];

        if (!$structure->can_be_edited()) {

            $buttonoptions['disabled'] = 'disabled';

        }

        return html_writer::tag('button', get_string('selectmultipleitems', 'quiz'), $buttonoptions);

    }

    /**

     * Generate the controls that appear when the bulk action button is pressed.

     *

     * @param structure $structure the structure of the quiz being edited.

     * @return string HTML to output.

     */

    protected function selectmultiple_controls(structure $structure) {

        $output = '';

        // Bulk action button delete and bulk action button cancel.

        $buttondeleteoptions = [

            'type' => 'button',

            'id' => 'selectmultipledeletecommand',

            'value' => get_string('deleteselected', 'mod_quiz'),

            'class' => 'btn btn-secondary',

            'data-action' => 'toggle',

            'data-togglegroup' => $this->togglegroup,

            'data-toggle' => 'action',

            'disabled' => true

        ];

        $buttoncanceloptions = [

            'type' => 'button',

            'id' => 'selectmultiplecancelcommand',

            'value' => get_string('cancel', 'moodle'),

            'class' => 'btn btn-secondary'

        ];

        $groupoptions = [

            'class' => 'btn-group selectmultiplecommand actions m-1',

            'role' => 'group'

        ];

        $output .= html_writer::tag('div',

                        html_writer::tag('button', get_string('deleteselected', 'mod_quiz'), $buttondeleteoptions) .

                        " " .

                        html_writer::tag('button', get_string('cancel', 'moodle'),

                $buttoncanceloptions), $groupoptions);

        $toolbaroptions = [

            'class' => 'btn-toolbar m-1',

            'role' => 'toolbar',

            'aria-label' => get_string('selectmultipletoolbar', 'quiz'),

        ];

        // Select all/deselect all questions.

        $selectallid = 'questionselectall';

        $selectalltext = get_string('selectall', 'moodle');

        $deselectalltext = get_string('deselectall', 'moodle');

        $mastercheckbox = new \core\output\checkbox_toggleall($this->togglegroup, true, [

            'id' => $selectallid,

            'name' => $selectallid,

            'value' => 1,

            'label' => $selectalltext,

            'selectall' => $selectalltext,

            'deselectall' => $deselectalltext,

        ], true);

        $selectdeselect = html_writer::div($this->render($mastercheckbox), 'selectmultiplecommandbuttons');

        $output .= html_writer::tag('div', $selectdeselect, $toolbaroptions);

        return $output;

    }

    /**

     * Return the repaginate form

     * @param structure $structure the structure of the quiz being edited.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @return string HTML to output.

     */

    protected function repaginate_form(structure $structure, \moodle_url $pageurl) {

        $perpage = [];

        $perpage[0] = get_string('allinone', 'quiz');

        for ($i = 1; $i <= 50; ++$i) {

            $perpage[$i] = $i;

        }

        $hiddenurl = clone($pageurl);

        $hiddenurl->param('sesskey', sesskey());

        $select = html_writer::select($perpage, 'questionsperpage',

                $structure->get_questions_per_page(), false, ['class' => 'custom-select']);

        $buttonattributes = [

            'type' => 'submit',

            'name' => 'repaginate',

            'value' => get_string('go'),

            'class' => 'btn btn-secondary ml-1'

        ];

        $formcontent = html_writer::tag('form', html_writer::div(

                    html_writer::input_hidden_params($hiddenurl) .

                    get_string('repaginate', 'quiz', $select) .

                    html_writer::empty_tag('input', $buttonattributes)

                ), ['action' => 'edit.php', 'method' => 'post']);

        return html_writer::div($formcontent, '', ['id' => 'repaginatedialog']);

    }

    /**

     * Render the total marks available for the quiz.

     *

     * @param \stdClass $quiz the quiz settings from the database.

     * @return string HTML to output.

     */

    public function total_marks($quiz) {

        $totalmark = html_writer::span(quiz_format_grade($quiz, $quiz->sumgrades), 'mod_quiz_summarks');

        return html_writer::tag('span',

                get_string('totalmarksx', 'quiz', $totalmark),

                ['class' => 'totalpoints']);

    }

    /**

     * Generate the starting container html for the start of a list of sections

     * @param structure $structure the structure of the quiz being edited.

     * @return string HTML to output.

     */

    protected function start_section_list(structure $structure) {

        $class = 'slots';

        if ($structure->get_section_count() == 1) {

            $class .= ' only-one-section';

        }

        return html_writer::start_tag('ul', ['class' => $class, 'role' => 'presentation']);

    }

    /**

     * Generate the closing container html for the end of a list of sections

     * @return string HTML to output.

     */

    protected function end_section_list() {

        return html_writer::end_tag('ul');

    }

    /**

     * Display the start of a section, before the questions.

     *

     * @param structure $structure the structure of the quiz being edited.

     * @param \stdClass $section The quiz_section entry from DB

     * @return string HTML to output.

     */

    protected function start_section($structure, $section) {

        $output = '';

        $sectionstyle = '';

        if ($structure->is_only_one_slot_in_section($section)) {

            $sectionstyle .= ' only-has-one-slot';

        }

        if ($section->shufflequestions) {

            $sectionstyle .= ' shuffled';

        }

        if ($section->heading) {

            $sectionheadingtext = format_string($section->heading);

            $sectionheading = html_writer::span($sectionheadingtext, 'instancesection');

        } else {

            // Use a sr-only default section heading, so we don't end up with an empty section heading.

            $sectionheadingtext = get_string('sectionnoname', 'quiz');

            $sectionheading = html_writer::span($sectionheadingtext, 'instancesection sr-only');

        }

        $output .= html_writer::start_tag('li', ['id' => 'section-'.$section->id,

            'class' => 'section main clearfix'.$sectionstyle, 'role' => 'presentation',

            'data-sectionname' => $sectionheadingtext]);

        $output .= html_writer::start_div('content');

        $output .= html_writer::start_div('section-heading');

        $headingtext = $this->heading(html_writer::span($sectionheading, 'sectioninstance'), 3);

        if (!$structure->can_be_edited()) {

            $editsectionheadingicon = '';

        } else {

            $editsectionheadingicon = html_writer::link(new \moodle_url('#'),

                $this->pix_icon('t/editstring', get_string('sectionheadingedit', 'quiz', $sectionheadingtext),

                        'moodle', ['class' => 'editicon visibleifjs']),

                        ['class' => 'editing_section', 'data-action' => 'edit_section_title', 'role' => 'button']);

        }

        $output .= html_writer::div($headingtext . $editsectionheadingicon, 'instancesectioncontainer');

        if (!$structure->is_first_section($section) && $structure->can_be_edited()) {

            $output .= $this->section_remove_icon($section);

        }

        $output .= $this->section_shuffle_questions($structure, $section);

        $output .= html_writer::end_div($output, 'section-heading');

        return $output;

    }

    /**

     * Display a checkbox for shuffling question within a section.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param \stdClass $section data from the quiz_section table.

     * @return string HTML to output.

     */

    public function section_shuffle_questions(structure $structure, $section) {

        $checkboxattributes = [

            'type' => 'checkbox',

            'id' => 'shuffle-' . $section->id,

            'value' => 1,

            'data-action' => 'shuffle_questions',

            'class' => 'cm-edit-action',

        ];

        if (!$structure->can_be_edited()) {

            $checkboxattributes['disabled'] = 'disabled';

        }

        if ($section->shufflequestions) {

            $checkboxattributes['checked'] = 'checked';

        }

        if ($structure->is_first_section($section)) {

            $help = $this->help_icon('shufflequestions', 'quiz');

        } else {

            $help = '';

        }

        $helpspan = html_writer::span($help, 'shuffle-help-tip');

        $progressspan = html_writer::span('', 'shuffle-progress');

        $checkbox = html_writer::empty_tag('input', $checkboxattributes);

        $label = html_writer::label(get_string('shufflequestions', 'quiz'),

                $checkboxattributes['id'], false);

        return html_writer::span($progressspan . $checkbox . $label. ' ' . $helpspan,

                'instanceshufflequestions', ['data-action' => 'shuffle_questions']);

    }

    /**

     * Display the end of a section, after the questions.

     *

     * @return string HTML to output.

     */

    protected function end_section() {

        $output = html_writer::end_tag('div');

        $output .= html_writer::end_tag('li');

        return $output;

    }

    /**

     * Render an icon to remove a section from the quiz.

     *

     * @param stdClass $section the section to be removed.

     * @return string HTML to output.

     */

    public function section_remove_icon($section) {

        $title = get_string('sectionheadingremove', 'quiz', format_string($section->heading));

        $url = new \moodle_url('/mod/quiz/edit.php',

                ['sesskey' => sesskey(), 'removesection' => '1', 'sectionid' => $section->id]);

        $image = $this->pix_icon('t/delete', $title);

        return $this->action_link($url, $image, null, [

                'class' => 'cm-edit-action editing_delete', 'data-action' => 'deletesection']);

    }

    /**

     * Renders HTML to display the questions in a section of the quiz.

     *

     * This function calls {@link core_course_renderer::quiz_section_question()}

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param \stdClass $section information about the section.

     * @param \core_question\local\bank\question_edit_contexts $contexts the relevant question bank contexts.

     * @param array $pagevars the variables from {@link \question_edit_setup()}.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @return string HTML to output.

     */

    public function questions_in_section(structure $structure, $section,

            $contexts, $pagevars, $pageurl) {

        $output = '';

        foreach ($structure->get_slots_in_section($section->id) as $slot) {

            $output .= $this->question_row($structure, $slot, $contexts, $pagevars, $pageurl);

        }

        return html_writer::tag('ul', $output, ['class' => 'section img-text']);

    }

    /**

     * Displays one question with the surrounding controls.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot which slot we are outputting.

     * @param \core_question\local\bank\question_edit_contexts $contexts the relevant question bank contexts.

     * @param array $pagevars the variables from {@link \question_edit_setup()}.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @return string HTML to output.

     */

    public function question_row(structure $structure, $slot, $contexts, $pagevars, $pageurl) {

        $output = '';

        $output .= $this->page_row($structure, $slot, $contexts, $pagevars, $pageurl);

        // Page split/join icon.

        $joinhtml = '';

        if ($structure->can_be_edited() && !$structure->is_last_slot_in_quiz($slot) &&

                                            !$structure->is_last_slot_in_section($slot)) {

            $joinhtml = $this->page_split_join_button($structure, $slot);

        }

        // Question HTML.

        $questionhtml = $this->question($structure, $slot, $pageurl);

        $qtype = $structure->get_question_type_for_slot($slot);

        $questionclasses = 'activity ' . $qtype . ' qtype_' . $qtype . ' slot';

        $output .= html_writer::tag('li', $questionhtml . $joinhtml,

                ['class' => $questionclasses, 'id' => 'slot-' . $structure->get_slot_id_for_slot($slot),

                        'data-canfinish' => $structure->can_finish_during_the_attempt($slot)]);

        return $output;

    }

    /**

     * Displays one question with the surrounding controls.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot the first slot on the page we are outputting.

     * @param \core_question\local\bank\question_edit_contexts $contexts the relevant question bank contexts.

     * @param array $pagevars the variables from {@link \question_edit_setup()}.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @return string HTML to output.

     */

    public function page_row(structure $structure, $slot, $contexts, $pagevars, $pageurl) {

        $output = '';

        $pagenumber = $structure->get_page_number_for_slot($slot);

        // Put page in a heading for accessibility and styling.

        $page = $this->heading(get_string('page') . ' ' . $pagenumber, 4);

        if ($structure->is_first_slot_on_page($slot)) {

            // Add the add-menu at the page level.

            $addmenu = html_writer::tag('span', $this->add_menu_actions($structure,

                    $pagenumber, $pageurl, $contexts, $pagevars),

                    ['class' => 'add-menu-outer']);

            $addquestionform = $this->add_question_form($structure,

                    $pagenumber, $pageurl, $pagevars);

            $output .= html_writer::tag('li', $page . $addmenu . $addquestionform,

                    ['class' => 'pagenumber activity yui3-dd-drop page', 'id' => 'page-' . $pagenumber]);

        }

        return $output;

    }

    /**

     * Returns the add menu that is output once per page.

     * @param structure $structure object containing the structure of the quiz.

     * @param int $page the page number that this menu will add to.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @param \core_question\local\bank\question_edit_contexts $contexts the relevant question bank contexts.

     * @param array $pagevars the variables from {@link \question_edit_setup()}.

     * @return string HTML to output.

     */

    public function add_menu_actions(structure $structure, $page, \moodle_url $pageurl,

            \core_question\local\bank\question_edit_contexts $contexts, array $pagevars) {

        $actions = $this->edit_menu_actions($structure, $page, $pageurl, $pagevars);

        if (empty($actions)) {

            return '';

        }

        $menu = new \action_menu();

        $trigger = html_writer::tag('span', get_string('add', 'quiz'), ['class' => 'add-menu']);

        $menu->set_menu_trigger($trigger);

        // The menu appears within an absolutely positioned element causing width problems.

        // Make sure no-wrap is set so that we don't get a squashed menu.

        $menu->set_nowrap_on_items(true);

        // Disable the link if quiz has attempts.

        if (!$structure->can_be_edited()) {

            return $this->render($menu);

        }

        foreach ($actions as $action) {

            if ($action instanceof \action_menu_link) {

                $action->add_class('add-menu');

            }

            $menu->add($action);

        }

        $menu->attributes['class'] .= ' page-add-actions commands';

        // Prioritise the menu ahead of all other actions.

        $menu->prioritise = true;

        return $this->render($menu);

    }

    /**

     * Returns the list of actions to go in the add menu.

     * @param structure $structure object containing the structure of the quiz.

     * @param int $page the page number that this menu will add to.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @param array $pagevars the variables from {@link \question_edit_setup()}.

     * @return array the actions.

     */

    public function edit_menu_actions(structure $structure, $page,

            \moodle_url $pageurl, array $pagevars) {

        $questioncategoryid = question_get_category_id_from_pagevars($pagevars);

        static $str;

        if (!isset($str)) {

            $str = get_strings(['addasection', 'addaquestion', 'addarandomquestion',

                    'addarandomselectedquestion', 'questionbank'], 'quiz');

        }

        // Get section, page, slotnumber and maxmark.

        $actions = [];

        // Add a new question to the quiz.

        $returnurl = new \moodle_url($pageurl, ['addonpage' => $page]);

        $params = ['returnurl' => $returnurl->out_as_local_url(false),

                'cmid' => $structure->get_cmid(), 'category' => $questioncategoryid,

                'addonpage' => $page, 'appendqnumstring' => 'addquestion'];

        $actions['addaquestion'] = new \action_menu_link_secondary(

            new \moodle_url('/question/bank/editquestion/addquestion.php', $params),

            new \pix_icon('t/add', $str->addaquestion, 'moodle', ['class' => 'iconsmall', 'title' => '']),

            $str->addaquestion, ['class' => 'cm-edit-action addquestion', 'data-action' => 'addquestion']

        );

        // Call question bank.

        $icon = new \pix_icon('t/add', $str->questionbank, 'moodle', ['class' => 'iconsmall', 'title' => '']);

        if ($page) {

            $title = get_string('addquestionfrombanktopage', 'quiz', $page);

        } else {

            $title = get_string('addquestionfrombankatend', 'quiz');

        }

        $attributes = ['class' => 'cm-edit-action questionbank',

                'data-header' => $title, 'data-action' => 'questionbank', 'data-addonpage' => $page];

        $actions['questionbank'] = new \action_menu_link_secondary($pageurl, $icon, $str->questionbank, $attributes);

        // Add a random question.

        if ($structure->can_add_random_questions()) {

            $returnurl = new \moodle_url('/mod/quiz/edit.php', ['cmid' => $structure->get_cmid(), 'data-addonpage' => $page]);

            $params = ['returnurl' => $returnurl, 'cmid' => $structure->get_cmid(), 'appendqnumstring' => 'addarandomquestion'];

            $url = new \moodle_url('/mod/quiz/edit.php', $params);

            $icon = new \pix_icon('t/add', $str->addarandomquestion, 'moodle', ['class' => 'iconsmall', 'title' => '']);

            $attributes = ['class' => 'cm-edit-action addarandomquestion', 'data-action' => 'addarandomquestion'];

            if ($page) {

                $title = get_string('addrandomquestiontopage', 'quiz', $page);

            } else {

                $title = get_string('addrandomquestionatend', 'quiz');

            }

            $attributes = array_merge(['data-header' => $title, 'data-addonpage' => $page], $attributes);

            $actions['addarandomquestion'] = new \action_menu_link_secondary($url, $icon, $str->addarandomquestion, $attributes);

        }

        // Add a new section to the add_menu if possible. This is always added to the HTML

        // then hidden with CSS when no needed, so that as things are re-ordered, etc. with

        // Ajax it can be relevaled again when necessary.

        $params = ['cmid' => $structure->get_cmid(), 'addsectionatpage' => $page];

        $actions['addasection'] = new \action_menu_link_secondary(

            new \moodle_url($pageurl, $params),

            new \pix_icon('t/add', $str->addasection, 'moodle', ['class' => 'iconsmall', 'title' => '']),

            $str->addasection, ['class' => 'cm-edit-action addasection', 'data-action' => 'addasection']

        );

        return $actions;

    }

    /**

     * Render the form that contains the data for adding a new question to the quiz.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $page the page number that this menu will add to.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @param array $pagevars the variables from {@link \question_edit_setup()}.

     * @return string HTML to output.

     */

    protected function add_question_form(structure $structure, $page, \moodle_url $pageurl, array $pagevars) {

        $questioncategoryid = question_get_category_id_from_pagevars($pagevars);

        $output = html_writer::tag('input', null,

                ['type' => 'hidden', 'name' => 'returnurl',

                        'value' => $pageurl->out_as_local_url(false, ['addonpage' => $page])]);

        $output .= html_writer::tag('input', null,

                ['type' => 'hidden', 'name' => 'cmid', 'value' => $structure->get_cmid()]);

        $output .= html_writer::tag('input', null,

                ['type' => 'hidden', 'name' => 'appendqnumstring', 'value' => 'addquestion']);

        $output .= html_writer::tag('input', null,

                ['type' => 'hidden', 'name' => 'category', 'value' => $questioncategoryid]);

        return html_writer::tag('form', html_writer::div($output),

                ['class' => 'addnewquestion', 'method' => 'post',

                        'action' => new \moodle_url('/question/bank/editquestion/addquestion.php')]);

    }

    /**

     * Display a question.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot the first slot on the page we are outputting.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @return string HTML to output.

     */

    public function question(structure $structure, int $slot, \moodle_url $pageurl) {

        // Get the data required by the question_slot template.

        $slotid = $structure->get_slot_id_for_slot($slot);

        $output = '';

        $output .= html_writer::start_tag('div');

        if ($structure->can_be_edited()) {

            $output .= $this->question_move_icon($structure, $slot);

        }

        if ($structure->can_display_number_be_customised($slot)) {

            $questionnumber = $this->output->render($structure->make_slot_display_number_in_place_editable(

                    $slotid, $structure->get_context()));

        } else {

            $questionnumber = $structure->get_displayed_number_for_slot($slot);

        }

        $data = [

            'slotid' => $slotid,

            'canbeedited' => $structure->can_be_edited(),

            'checkbox' => $this->get_checkbox_render($structure, $slot),

            'questionnumber' => $this->question_number($questionnumber, $structure->get_slot_by_number($slot)->defaultnumber),

            'questionname' => $this->get_question_name_for_slot($structure, $slot, $pageurl),

            'questionicons' => $this->get_action_icon($structure, $slot, $pageurl),

            'questiondependencyicon' => ($structure->can_be_edited() ? $this->question_dependency_icon($structure, $slot) : ''),

            'versionselection' => false,

            'draftversion' => $structure->get_question_in_slot($slot)->status == question_version_status::QUESTION_STATUS_DRAFT,

        ];

        $data['versionoptions'] = [];

        if ($structure->get_slot_by_number($slot)->qtype !== 'random') {

            $data['versionselection'] = true;

            $data['versionoption'] = $structure->get_version_choices_for_slot($slot);

            $this->page->requires->js_call_amd('mod_quiz/question_slot', 'init', [$slotid]);

        }

        // Render the question slot template.

        $output .= $this->render_from_template('mod_quiz/question_slot', $data);

        $output .= html_writer::end_tag('div');

        return $output;

    }

    /**

     * Get the checkbox render.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot the slot on the page we are outputting.

     * @return string HTML to output.

     */

    public function get_checkbox_render(structure $structure, int $slot): string {

        $questionslot = $structure->get_displayed_number_for_slot($slot);

        $checkbox = new \core\output\checkbox_toggleall($this->togglegroup, false,

            [

                'id' => 'selectquestion-' . $slot,

                'name' => 'selectquestion[]',

                'classes' => 'select-multiple-checkbox',

                'label' => get_string('selectquestionslot', 'quiz', $questionslot),

                'labelclasses' => 'sr-only',

            ]);

        return $this->render($checkbox);

    }

    /**

     * Get the question name for the slot.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot the slot on the page we are outputting.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @return string HTML to output.

     */

    public function get_question_name_for_slot(structure $structure, int $slot, \moodle_url $pageurl): string {

        // Display the link to the question (or do nothing if question has no url).

        if ($structure->get_question_type_for_slot($slot) === 'random') {

            $questionname = $this->random_question($structure, $slot, $pageurl);

        } else {

            $questionname = $this->question_name($structure, $slot, $pageurl);

        }

        return $questionname;

    }

    /**

     * Get the action icons render.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot the slot on the page we are outputting.

     * @param \moodle_url $pageurl the canonical URL of this page.

     * @return string HTML to output.

     */

    public function get_action_icon(structure $structure, int $slot, \moodle_url $pageurl): string {

        // Action icons.

        $qtype = $structure->get_question_type_for_slot($slot);

        $slotinfo = $structure->get_slot_by_number($slot);

        $questionicons = '';

        if ($qtype !== 'random') {

            $questionicons .= $this->question_preview_icon($structure->get_quiz(),

                    $structure->get_question_in_slot($slot),

                    null, null, $slotinfo->requestedversion ?: question_preview_options::ALWAYS_LATEST);

        }

        if ($structure->can_be_edited() && $structure->has_use_capability($slot)) {

            $questionicons .= $this->question_remove_icon($structure, $slot, $pageurl);

        }

        $questionicons .= $this->marked_out_of_field($structure, $slot);

        return $questionicons;

    }

    /**

     * Render the move icon.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot the first slot on the page we are outputting.

     * @return string The markup for the move action.

     */

    public function question_move_icon(structure $structure, $slot) {

        return html_writer::link(new \moodle_url('#'),

            $this->pix_icon('i/dragdrop', get_string('move'), 'moodle', ['class' => 'iconsmall', 'title' => '']),

            ['class' => 'editing_move', 'data-action' => 'move']

        );

    }

    /**

     * Output the question number.

     *

     * @param string $editablenumber The, which may be an in-place editable.

     * @param string $uncustomisednumber The un-customised number number, or 'i'.

     * @return string HTML to output.

     */

    public function question_number(string $editablenumber, string $uncustomisednumber) {

        if ($editablenumber !== get_string('infoshort', 'quiz')) {

            $editablenumber = html_writer::span(get_string('question'), 'accesshide') . ' ' . $editablenumber;

            $uncustomisednumber = html_writer::span(get_string('question'), 'accesshide') . ' ' . $uncustomisednumber;

        }

        return html_writer::tag('span', $editablenumber, ['class' => 'slotnumber unshuffled']) .

                html_writer::tag('span', $uncustomisednumber, ['class' => 'slotnumber shuffled']);

    }

    /**

     * Render the preview icon.

     *

     * @param \stdClass $quiz the quiz settings from the database.

     * @param \stdClass $questiondata which question to preview.

     *      If ->questionid is set, that is used instead of ->id.

     * @param bool $label if true, show the preview question label after the icon

     * @param int $variant which question variant to preview (optional).

     * @param int $restartversion version to use when restarting the preview

     * @return string HTML to output.

     */

    public function question_preview_icon($quiz, $questiondata, $label = null, $variant = null, $restartversion = null) {

        $question = clone($questiondata);

        if (isset($question->questionid)) {

            $question->id = $question->questionid;

        }

        $url = quiz_question_preview_url($quiz, $question, $variant, $restartversion);

        // Do we want a label?

        $strpreviewlabel = '';

        if ($label) {

            $strpreviewlabel = ' ' . get_string('preview', 'quiz');

        }

        // Build the icon.

        $strpreviewquestion = get_string('previewquestion', 'quiz');

        $image = $this->pix_icon('t/preview', $strpreviewquestion);

        $action = new \popup_action('click', $url, 'questionpreview',

                \qbank_previewquestion\helper::question_preview_popup_params());

        return $this->action_link($url, $image . $strpreviewlabel, $action,

                ['title' => $strpreviewquestion, 'class' => 'preview']);

    }

    /**

     * Render an icon to remove a question from the quiz.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot the first slot on the page we are outputting.

     * @param \moodle_url $pageurl the canonical URL of the edit page.

     * @return string HTML to output.

     */

    public function question_remove_icon(structure $structure, $slot, $pageurl) {

        $url = new \moodle_url($pageurl, ['sesskey' => sesskey(), 'remove' => $slot]);

        $strdelete = get_string('delete');

        $image = $this->pix_icon('t/delete', $strdelete);

        return $this->action_link($url, $image, null, ['title' => $strdelete,

                    'class' => 'cm-edit-action editing_delete', 'data-action' => 'delete']);

    }

    /**

     * Display an icon to split or join two pages of the quiz.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot the first slot on the page we are outputting.

     * @return string HTML to output.

     */

    public function page_split_join_button($structure, $slot) {

        $insertpagebreak = !$structure->is_last_slot_on_page($slot);

        $url = new \moodle_url('repaginate.php', ['quizid' => $structure->get_quizid(),

                'slot' => $slot, 'repag' => $insertpagebreak ? 2 : 1, 'sesskey' => sesskey()]);

        if ($insertpagebreak) {

            $title = get_string('addpagebreak', 'quiz');

            $image = $this->image_icon('e/insert_page_break', $title);

            $action = 'addpagebreak';

        } else {

            $title = get_string('removepagebreak', 'quiz');

            $image = $this->image_icon('e/remove_page_break', $title);

            $action = 'removepagebreak';

        }

        // Disable the link if quiz has attempts.

        $disabled = null;

        if (!$structure->can_be_edited()) {

            $disabled = 'disabled';

        }

        return html_writer::span($this->action_link($url, $image, null, ['title' => $title,

                    'class' => 'page_split_join cm-edit-action', 'disabled' => $disabled, 'data-action' => $action]),

                'page_split_join_wrapper');

    }

    /**

     * Display the icon for whether this question can only be seen if the previous

     * one has been answered.

     *

     * @param structure $structure object containing the structure of the quiz.

     * @param int $slot the first slot on the page we are outputting.

     * @return string HTML to output.

     */

    public function question_dependency_icon($structure, $slot) {

        $a = [

            'thisq' => $structure->get_displayed_number_for_slot($slot),

            'previousq' => $structure->get_displayed_number_for_slot(max($slot - 1, 1)),

        ];

        if ($structure->is_question_dependent_on_previous_slot($slot)) {

            $title = get_string('questiondependencyremove', 'quiz', $a);

            $image = $this->pix_icon('t/locked', get_string('questiondependsonprevious', 'quiz'),

                    'moodle', ['title' => '']);

            $action = 'removedependency';

        } else {

            $title = get_string('questiondependencyadd', 'quiz', $a);

            $image = $this->pix_icon('t/unlocked', get_string('questiondependencyfree', 'quiz'),

                    'moodle', ['title' => '']);

            $action = 'adddependency';

        }

        // Disable the link if quiz has attempts.

        $disabled = null;

        if (!$structure->can_be_edited()) {

            $disabled = 'disabled';

        }

        $extraclass = '';

        if (!$structure->can_question_depend_on_previous_slot($slot)) {