Henning Bostelmann
220 lines
7.9 KiB
PHP
220 lines
7.9 KiB
PHP
<?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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* Question behaviour for the old adaptive mode.
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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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* Question behaviour for adaptive mode.
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*
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* This is the old version of interactive mode.
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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 extends question_behaviour_with_save {
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const IS_ARCHETYPAL = true;
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public function is_compatible_question(question_definition $question) {
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return $question instanceof question_automatically_gradable;
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}
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public function get_expected_data() {
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if ($this->qa->get_state()->is_active()) {
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return array('submit' => PARAM_BOOL);
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}
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return parent::get_expected_data();
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}
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public function get_state_string($showcorrectness) {
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$laststep = $this->qa->get_last_step();
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if ($laststep->has_behaviour_var('_try')) {
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$state = question_state::graded_state_for_fraction(
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$laststep->get_behaviour_var('_rawfraction'));
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return $state->default_string(true);
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}
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$state = $this->qa->get_state();
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if ($state == question_state::$todo) {
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return get_string('notcomplete', 'qbehaviour_adaptive');
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} else {
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return parent::get_state_string($showcorrectness);
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}
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}
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public function get_right_answer_summary() {
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return $this->question->get_right_answer_summary();
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}
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public function adjust_display_options(question_display_options $options) {
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parent::adjust_display_options($options);
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if (!$this->qa->get_state()->is_finished() &&
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$this->qa->get_last_behaviour_var('_try')) {
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$options->feedback = true;
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}
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}
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public function process_action(question_attempt_pending_step $pendingstep) {
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if ($pendingstep->has_behaviour_var('comment')) {
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return $this->process_comment($pendingstep);
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} else if ($pendingstep->has_behaviour_var('finish')) {
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return $this->process_finish($pendingstep);
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} else if ($pendingstep->has_behaviour_var('submit')) {
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return $this->process_submit($pendingstep);
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} else {
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return $this->process_save($pendingstep);
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}
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}
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public function summarise_action(question_attempt_step $step) {
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if ($step->has_behaviour_var('comment')) {
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return $this->summarise_manual_comment($step);
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} else if ($step->has_behaviour_var('finish')) {
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return $this->summarise_finish($step);
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} else if ($step->has_behaviour_var('submit')) {
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return $this->summarise_submit($step);
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} else {
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return $this->summarise_save($step);
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}
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}
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public function process_save(question_attempt_pending_step $pendingstep) {
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$status = parent::process_save($pendingstep);
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$prevgrade = $this->qa->get_fraction();
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if (!is_null($prevgrade)) {
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$pendingstep->set_fraction($prevgrade);
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}
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$pendingstep->set_state(question_state::$todo);
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return $status;
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}
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protected function adjusted_fraction($fraction, $prevtries) {
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return $fraction - $this->question->penalty * $prevtries;
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}
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public function process_submit(question_attempt_pending_step $pendingstep) {
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$status = $this->process_save($pendingstep);
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$response = $pendingstep->get_qt_data();
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if (!$this->question->is_complete_response($response)) {
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$pendingstep->set_state(question_state::$invalid);
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if ($this->qa->get_state() != question_state::$invalid) {
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$status = question_attempt::KEEP;
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}
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return $status;
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}
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$prevstep = $this->qa->get_last_step_with_behaviour_var('_try');
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$prevresponse = $prevstep->get_qt_data();
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$prevtries = $this->qa->get_last_behaviour_var('_try', 0);
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$prevbest = $pendingstep->get_fraction();
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if (is_null($prevbest)) {
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$prevbest = 0;
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}
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if ($this->question->is_same_response($response, $prevresponse)) {
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return question_attempt::DISCARD;
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}
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list($fraction, $state) = $this->question->grade_response($response);
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$pendingstep->set_fraction(max($prevbest, $this->adjusted_fraction($fraction, $prevtries)));
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if ($prevstep->get_state() == question_state::$complete) {
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$pendingstep->set_state(question_state::$complete);
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} else if ($state == question_state::$gradedright) {
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$pendingstep->set_state(question_state::$complete);
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} else {
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$pendingstep->set_state(question_state::$todo);
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}
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$pendingstep->set_behaviour_var('_try', $prevtries + 1);
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$pendingstep->set_behaviour_var('_rawfraction', $fraction);
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$pendingstep->set_new_response_summary($this->question->summarise_response($response));
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return question_attempt::KEEP;
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}
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public function process_finish(question_attempt_pending_step $pendingstep) {
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if ($this->qa->get_state()->is_finished()) {
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return question_attempt::DISCARD;
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}
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$prevtries = $this->qa->get_last_behaviour_var('_try', 0);
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$prevbest = $this->qa->get_fraction();
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if (is_null($prevbest)) {
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$prevbest = 0;
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}
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$laststep = $this->qa->get_last_step();
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$response = $laststep->get_qt_data();
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if (!$this->question->is_gradable_response($response)) {
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$state = question_state::$gaveup;
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$fraction = 0;
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} else {
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if ($laststep->has_behaviour_var('_try')) {
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// Last answer was graded, we want to regrade it. Otherwise the answer
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// has changed, and we are grading a new try.
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$prevtries -= 1;
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}
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list($fraction, $state) = $this->question->grade_response($response);
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$pendingstep->set_behaviour_var('_try', $prevtries + 1);
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$pendingstep->set_behaviour_var('_rawfraction', $fraction);
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$pendingstep->set_new_response_summary($this->question->summarise_response($response));
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}
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$pendingstep->set_state($state);
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$pendingstep->set_fraction(max($prevbest, $this->adjusted_fraction($fraction, $prevtries)));
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return question_attempt::KEEP;
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}
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/**
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* Got the most recently graded step. This is mainly intended for use by the
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* renderer.
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* @return question_attempt_step the most recently graded step.
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*/
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public function get_graded_step() {
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$step = $this->qa->get_last_step_with_behaviour_var('_try');
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if ($step->has_behaviour_var('_try')) {
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return $step;
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} else {
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return null;
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}
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}
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/**
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* Determine whether a question state represents an "improvable" result,
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* that is, whether the user can still improve their score.
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*
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* @param question_state $state the question state.
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* @return bool whether the state is improvable
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*/
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public function is_state_improvable(question_state $state) {
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return $state == question_state::$todo;
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}
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}
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