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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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 * Renderer for outputting parts of a question belonging to the legacy
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 * adaptive behaviour.
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 *
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 * @package    qbehaviour
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 * @subpackage adaptive
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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 for outputting parts of a question belonging to the legacy
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 * adaptive behaviour.
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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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class qbehaviour_adaptive_renderer extends qbehaviour_renderer {
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    public function controls(question_attempt $qa, question_display_options $options) {
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        return $this->submit_button($qa, $options);
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    }
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    public function feedback(question_attempt $qa, question_display_options $options) {
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        // If the latest answer was invalid, display an informative message.
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        if ($qa->get_state() == question_state::$invalid) {
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            return html_writer::nonempty_tag('div', $this->disregarded_info(),
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                    array('class' => 'gradingdetails'));
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        }
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        // Otherwise get the details.
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        return $this->render_adaptive_marks(
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                $qa->get_behaviour()->get_adaptive_marks(), $options);
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    }
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    /**
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     * Display the scoring information about an adaptive attempt.
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     * @param qbehaviour_adaptive_mark_details contains all the score details we need.
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     * @param question_display_options $options display options.
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     */
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    public function render_adaptive_marks(qbehaviour_adaptive_mark_details $details, question_display_options $options) {
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        if ($details->state == question_state::$todo || $options->marks < question_display_options::MARK_AND_MAX) {
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            // No grades yet.
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            return '';
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        }
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        // Display the grading details from the last graded state.
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        $class = $details->state->get_feedback_class();
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        return html_writer::tag('div', get_string($class, 'question'),
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                        array('class' => 'correctness badge ' . $class))
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                . html_writer::tag('div', $this->grading_details($details, $options),
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                        array('class' => 'gradingdetails'));
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    }
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    /**
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     * Display the information about the penalty calculations.
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     * @param qbehaviour_adaptive_mark_details contains all the score details we need.
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     * @param question_display_options $options display options.
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     * @return string html fragment
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     */
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    protected function grading_details(qbehaviour_adaptive_mark_details $details, question_display_options $options) {
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        $mark = $details->get_formatted_marks($options->markdp);
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        if ($details->currentpenalty == 0 && $details->totalpenalty == 0) {
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            return get_string('gradingdetails', 'qbehaviour_adaptive', $mark);
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        }
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        $output = '';
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        // Print details of grade adjustment due to penalties
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        if ($details->rawmark != $details->actualmark) {
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            if (!$details->improvable) {
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                return get_string('gradingdetailswithadjustment', 'qbehaviour_adaptive', $mark);
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            } else if ($details->totalpenalty > $details->currentpenalty) {
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                return get_string('gradingdetailswithadjustmenttotalpenalty', 'qbehaviour_adaptive', $mark);
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            } else {
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                return get_string('gradingdetailswithadjustmentpenalty', 'qbehaviour_adaptive', $mark);
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            }
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        } else {
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            if (!$details->improvable) {
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                return get_string('gradingdetails', 'qbehaviour_adaptive', $mark);
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            } else if ($details->totalpenalty > $details->currentpenalty) {
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                return get_string('gradingdetailswithtotalpenalty', 'qbehaviour_adaptive', $mark);
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            } else {
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                return get_string('gradingdetailswithpenalty', 'qbehaviour_adaptive', $mark);
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            }
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        }
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        return $output;
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    }
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    /**
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     * Display information about a disregarded (incomplete) response.
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     */
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    protected function disregarded_info() {
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        return get_string('disregardedwithoutpenalty', 'qbehaviour_adaptive');
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    }
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}