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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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/**
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 * Defines the renderer base class for question behaviours.
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 *
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 * @package    moodlecore
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 * @subpackage questionbehaviours
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 * @copyright  2009 The Open University
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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defined('MOODLE_INTERNAL') || die();
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/**
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 * Renderer base class for question behaviours.
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 *
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 * The methods in this class are mostly called from {@link core_question_renderer}
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 * which coordinates the overall output of questions.
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 *
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 * @copyright  2009 The Open University
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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abstract class qbehaviour_renderer extends plugin_renderer_base {
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    /**
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     * Generate some HTML (which may be blank) that appears in the question
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     * formulation area, afer the question type generated output.
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     *
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     * For example.
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     * immediatefeedback and interactive mode use this to show the Submit button,
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     * and CBM use this to display the certainty choices.
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     *
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     * @param question_attempt $qa a question attempt.
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     * @param question_display_options $options controls what should and should not be displayed.
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     * @return string HTML fragment.
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     */
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    public function controls(question_attempt $qa, question_display_options $options) {
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        return '';
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    }
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    /**
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     * Generate some HTML (which may be blank) that appears in the outcome area,
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     * after the question-type generated output.
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     *
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     * For example, the CBM models use this to display an explanation of the score
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     * adjustment that was made based on the certainty selected.
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     *
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     * @param question_attempt $qa a question attempt.
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     * @param question_display_options $options controls what should and should not be displayed.
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     * @return string HTML fragment.
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     */
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    public function feedback(question_attempt $qa, question_display_options $options) {
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        return '';
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    }
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    public function manual_comment_fields(question_attempt $qa, question_display_options $options) {
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        global $CFG;
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        require_once($CFG->dirroot.'/lib/filelib.php');
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        require_once($CFG->dirroot.'/repository/lib.php');
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        $inputname = $qa->get_behaviour_field_name('comment');
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        $id = $inputname . '_id';
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        list($commenttext, $commentformat, $commentstep) = $qa->get_current_manual_comment();
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        $editor = editors_get_preferred_editor($commentformat);
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        $strformats = format_text_menu();
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        $formats = $editor->get_supported_formats();
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        foreach ($formats as $fid) {
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            $formats[$fid] = $strformats[$fid];
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        }
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        $draftitemareainputname = $qa->get_behaviour_field_name('comment:itemid');
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        $draftitemid = optional_param($draftitemareainputname, false, PARAM_INT);
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        if (!$draftitemid && $commentstep === null) {
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            $commenttext = '';
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            $draftitemid = file_get_unused_draft_itemid();
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        } else if (!$draftitemid) {
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            list($draftitemid, $commenttext) = $commentstep->prepare_response_files_draft_itemid_with_text(
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                    'bf_comment', $options->context->id, $commenttext);
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        }
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        $editor->set_text($commenttext);
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        $editor->use_editor($id, question_utils::get_editor_options($options->context),
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                question_utils::get_filepicker_options($options->context, $draftitemid));
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        $commenteditor = html_writer::tag('div', html_writer::tag('textarea', s($commenttext),
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                array('id' => $id, 'name' => $inputname, 'rows' => 3, 'cols' => 60)));
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        $attributes = ['type'  => 'hidden', 'name'  => $draftitemareainputname, 'value' => $draftitemid];
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        $commenteditor .= html_writer::empty_tag('input', $attributes);
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        $editorformat = '';
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        if (count($formats) == 1) {
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            reset($formats);
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            $editorformat .= html_writer::empty_tag('input', array('type' => 'hidden',
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                    'name' => $inputname . 'format', 'value' => key($formats)));
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        } else {
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            $editorformat = html_writer::start_tag('div', array('class' => 'fitem'));
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            $editorformat .= html_writer::start_tag('div', array('class' => 'fitemtitle'));
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            $editorformat .= html_writer::tag('label', get_string('format'), array('for'=>'menu'.$inputname.'format'));
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            $editorformat .= html_writer::end_tag('div');
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            $editorformat .= html_writer::start_tag('div', array('class' => 'felement fhtmleditor'));
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            $editorformat .= html_writer::select($formats, $inputname.'format', $commentformat, '');
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            $editorformat .= html_writer::end_tag('div');
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            $editorformat .= html_writer::end_tag('div');
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        }
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        $comment = html_writer::tag('div', html_writer::tag('div',
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                html_writer::tag('label', get_string('comment', 'question'),
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                array('for' => $id)), array('class' => 'fitemtitle')) .
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                html_writer::tag('div', $commenteditor, array('class' => 'felement fhtmleditor', 'data-fieldtype' => "editor")),
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                array('class' => 'fitem'));
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        $comment .= $editorformat;
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        $mark = '';
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        if ($qa->get_max_mark()) {
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            $currentmark = $qa->get_current_manual_mark();
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            $maxmark = $qa->get_max_mark();
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            $fieldsize = strlen($qa->format_max_mark($options->markdp)) - 1;
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            $markfield = $qa->get_behaviour_field_name('mark');
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            $attributes = array(
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                'type' => 'text',
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                'size' => $fieldsize,
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                'name' => $markfield,
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                'id'=> $markfield
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            );
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            if (!is_null($currentmark)) {
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                $attributes['value'] = $currentmark;
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            }
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            $markrange = html_writer::empty_tag('input', array(
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                'type' => 'hidden',
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                'name' => $qa->get_behaviour_field_name('maxmark'),
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                'value' => $maxmark,
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            )) . html_writer::empty_tag('input', array(
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                'type' => 'hidden',
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                'name' => $qa->get_control_field_name('minfraction'),
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                'value' => $qa->get_min_fraction(),
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            )) . html_writer::empty_tag('input', array(
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                'type' => 'hidden',
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                'name' => $qa->get_control_field_name('maxfraction'),
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                'value' => $qa->get_max_fraction(),
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            ));
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            $error = $qa->validate_manual_mark($currentmark);
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            $errorclass = '';
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            if ($error !== '') {
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                $erroclass = ' error';
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                $error = html_writer::tag('span', $error,
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                        array('class' => 'error')) . html_writer::empty_tag('br');
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            }
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            $a = new stdClass();
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            $a->max = $qa->format_max_mark($options->markdp);
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            $a->mark = html_writer::empty_tag('input', $attributes);
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            $mark = html_writer::tag('div', html_writer::tag('div',
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                        html_writer::tag('label', get_string('mark', 'question'),
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                        array('for' => $markfield)),
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                    array('class' => 'fitemtitle')) .
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                    html_writer::tag('div', $error . get_string('xoutofmax', 'question', $a) .
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                        $markrange, array('class' => 'felement ftext' . $errorclass)
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                    ), array('class' => 'fitem'));
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        }
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        return html_writer::tag('fieldset', html_writer::tag('div', $comment . $mark,
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                array('class' => 'fcontainer clearfix')), array('class' => 'hidden'));
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    }
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    public function manual_comment_view(question_attempt $qa, question_display_options $options) {
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        $output = '';
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        if ($qa->has_manual_comment()) {
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            $output .= get_string('commentx', 'question',
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                    $qa->get_behaviour(false)->format_comment(null, null, $options->context));
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        }
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        if ($options->manualcommentlink) {
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            $url = new moodle_url($options->manualcommentlink, array('slot' => $qa->get_slot()));
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            $link = $this->output->action_link($url, get_string('commentormark', 'question'),
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                    new popup_action('click', $url, 'commentquestion',
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                    array('width' => 600, 'height' => 800)));
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            $output .= html_writer::tag('div', $link, array('class' => 'commentlink'));
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        }
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        return $output;
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    }
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    /**
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     * Display the manual comment, and a link to edit it, if appropriate.
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     *
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     * @param question_attempt $qa a question attempt.
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     * @param question_display_options $options controls what should and should not be displayed.
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     * @return string HTML fragment.
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     */
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    public function manual_comment(question_attempt $qa, question_display_options $options) {
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        if ($options->manualcomment == question_display_options::EDITABLE) {
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            return $this->manual_comment_fields($qa, $options);
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        } else if ($options->manualcomment == question_display_options::VISIBLE) {
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            return $this->manual_comment_view($qa, $options);
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        } else {
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            return '';
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        }
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    }
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    /**
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     * Several behaviours need a submit button, so put the common code here.
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     * The button is disabled if the question is displayed read-only.
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     * @param question_display_options $options controls what should and should not be displayed.
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     * @return string HTML fragment.
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     */
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    protected function submit_button(question_attempt $qa, question_display_options $options) {
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        if (!$qa->get_state()->is_active()) {
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            return '';
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        }
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        $attributes = array(
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            'type' => 'submit',
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            'id' => $qa->get_behaviour_field_name('submit'),
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            'name' => $qa->get_behaviour_field_name('submit'),
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            'value' => 1,
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            'class' => 'submit btn btn-secondary',
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            'data-savescrollposition' => 'true',
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        );
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        if ($options->readonly) {
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            $attributes['disabled'] = 'disabled';
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        }
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        $output = html_writer::tag('button',
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            $options->add_question_identifier_to_label(get_string('check', 'question'), true), $attributes);
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        if (!$options->readonly) {
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            $this->page->requires->js_call_amd('core_question/question_engine', 'initSubmitButton', [$attributes['id']]);
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        }
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        return $output;
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    }
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    /**
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     * Return any HTML that needs to be included in the page's <head> when
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     * questions using this model are used.
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     * @param $qa the question attempt that will be displayed on the page.
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     * @return string HTML fragment.
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     */
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    public function head_code(question_attempt $qa) {
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        return '';
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    }
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    /**
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     * Generate the display of the marks for this question.
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     * @param question_attempt $qa the question attempt to display.
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     * @param core_question_renderer $qoutput the renderer for standard parts of questions.
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     * @param question_display_options $options controls what should and should not be displayed.
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     * @return HTML fragment.
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     */
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    public function mark_summary(question_attempt $qa, core_question_renderer $qoutput,
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            question_display_options $options) {
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        return $qoutput->standard_mark_summary($qa, $this, $options);
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    }
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    /**
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     * Generate the display of the available marks for this question.
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     * @param question_attempt $qa the question attempt to display.
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     * @param core_question_renderer $qoutput the renderer for standard parts of questions.
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     * @param question_display_options $options controls what should and should not be displayed.
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     * @return HTML fragment.
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     */
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    public function marked_out_of_max(question_attempt $qa, core_question_renderer $qoutput,
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            question_display_options $options) {
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        return $qoutput->standard_marked_out_of_max($qa, $options);
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    }
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    /**
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     * Generate the display of the marks for this question out of the available marks.
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     * @param question_attempt $qa the question attempt to display.
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     * @param core_question_renderer $qoutput the renderer for standard parts of questions.
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     * @param question_display_options $options controls what should and should not be displayed.
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     * @return HTML fragment.
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     */
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    public function mark_out_of_max(question_attempt $qa, core_question_renderer $qoutput,
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            question_display_options $options) {
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        return $qoutput->standard_mark_out_of_max($qa, $options);
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    }
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}