Proyectos de Subversion Moodle

<?php

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/**

 *

 * Data structure to count responses for each of the sub parts of a question.

 *

 * @package    core_question

 * @copyright  2014 The Open University

 * @author     James Pratt me@jamiep.org

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

 */

namespace core_question\statistics\responses;

/**

 * Representing the analysis of each of the sub parts of each variant of the question.

 *

 * - There is a separate data structure for each question or sub question's analysis

 * {@link \core_question\statistics\responses\analysis_for_question}

 * or {@link \core_question\statistics\responses\analysis_for_question_all_tries}.

 * - There are separate analysis for each variant in this top level instance.

 * - Then there are class instances representing the analysis of each of the sub parts of each variant of the question.

 * {@link \core_question\statistics\responses\analysis_for_subpart}.

 * - Then within the sub part analysis there are response class analysis

 * {@link \core_question\statistics\responses\analysis_for_class}.

 * - Then within each class analysis there are analysis for each actual response

 * {@link \core_question\statistics\responses\analysis_for_actual_response}.

 *

 * @package    core_question

 * @copyright  2014 The Open University

 * @author     James Pratt me@jamiep.org

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

 */

class analysis_for_subpart {

    /**

     * @var analysis_for_class[]

     */

    protected $responseclasses;

    /**

     * Takes an array of possible_responses as returned from {@link \question_type::get_possible_responses()}.

     *

     * @param \question_possible_response[] $responseclasses as returned from {@link \question_type::get_possible_responses()}.

     */

    public function __construct(array $responseclasses = null) {

        if (is_array($responseclasses)) {

            foreach ($responseclasses as $responseclassid => $responseclass) {

                $this->responseclasses[$responseclassid] = new analysis_for_class($responseclass, $responseclassid);

            }

        } else {

            $this->responseclasses = [];

        }

    }

    /**

     * Unique ids for response classes.

     *

     * @return string[]

     */

    public function get_response_class_ids() {

        return array_keys($this->responseclasses);

    }

    /**

     * Get the instance of the class handling the analysis of $classid for this sub part.

     *

     * @param string $classid id for response class.

     * @return analysis_for_class

     */

    public function get_response_class($classid) {

        if (!isset($this->responseclasses[$classid])) {

            debugging('Unexpected class id ' . $classid . ' encountered.');

            $this->responseclasses[$classid] = new analysis_for_class('[Unknown]', $classid);

        }

        return $this->responseclasses[$classid];

    }

    /**

     * Whether there is more than one response class for responses in this question sub part?

     *

     * @return bool Are there?

     */

    public function has_multiple_response_classes() {

        return count($this->get_response_class_ids()) > 1;

    }

    /**

     * Count a part of a response.

     *

     * @param \question_classified_response $subpart

     * @param int $try the try number or zero if not keeping track of try number

     */

    public function count_response($subpart, $try = 0) {

        $responseanalysisforclass = $this->get_response_class($subpart->responseclassid);

        $responseanalysisforclass->count_response($subpart->response, $subpart->fraction, $try);

    }

    /**

     * Cache analysis for sub part.

     *

     * @param \qubaid_condition $qubaids    which question usages have been analysed.

     * @param string            $whichtries which tries have been analysed?

     * @param int               $questionid which question.

     * @param int               $variantno  which variant.

     * @param string            $subpartid  which sub part.

     * @param int|null          $calculationtime time when the analysis was done. (Defaults to time()).

     */

    public function cache($qubaids, $whichtries, $questionid, $variantno, $subpartid, $calculationtime = null) {

        foreach ($this->get_response_class_ids() as $responseclassid) {

            $analysisforclass = $this->get_response_class($responseclassid);

            $analysisforclass->cache($qubaids, $whichtries, $questionid, $variantno, $subpartid, $calculationtime);

        }

    }

    /**

     * Has actual responses different to the model response for this class?

     *

     * @return bool whether this analysis has a response class with more than one

     *      different actual response, or if the actual response is different from

     *      the model response.

     */

    public function has_actual_responses() {

        foreach ($this->get_response_class_ids() as $responseclassid) {

            if ($this->get_response_class($responseclassid)->has_actual_responses()) {

                return true;

            }

        }

        return false;

    }

    /**

     * What is the highest try number for this sub part?

     *

     * @return int max tries

     */

    public function get_maximum_tries() {

        $max = 1;

        foreach ($this->get_response_class_ids() as $responseclassid) {

            $max = max($max, $this->get_response_class($responseclassid)->get_maximum_tries());

        }

        return $max;

    }

}