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/>.

defined('MOODLE_INTERNAL') OR die('not allowed');

require_once($CFG->dirroot.'/mod/feedback/item/feedback_item_class.php');

class feedback_item_numeric extends feedback_item_base {

    protected $type = "numeric";

    public function build_editform($item, $feedback, $cm) {

        global $DB, $CFG;

        require_once('numeric_form.php');

        //get the lastposition number of the feedback_items

        $position = $item->position;

        $lastposition = $DB->count_records('feedback_item', array('feedback'=>$feedback->id));

        if ($position == -1) {

            $i_formselect_last = $lastposition + 1;

            $i_formselect_value = $lastposition + 1;

            $item->position = $lastposition + 1;

        } else {

            $i_formselect_last = $lastposition;

            $i_formselect_value = $item->position;

        }

        //the elements for position dropdownlist

        $positionlist = array_slice(range(0, $i_formselect_last), 1, $i_formselect_last, true);

        $item->presentation = empty($item->presentation) ? '' : $item->presentation;

        $range_from_to = explode('|', $item->presentation);

        if (isset($range_from_to[0]) AND is_numeric($range_from_to[0])) {

            $range_from = $this->format_float($range_from_to[0]);

        } else {

            $range_from = '-';

        }

        if (isset($range_from_to[1]) AND is_numeric($range_from_to[1])) {

            $range_to = $this->format_float($range_from_to[1]);

        } else {

            $range_to = '-';

        }

        $item->rangefrom = $range_from;

        $item->rangeto = $range_to;

        //all items for dependitem

        $feedbackitems = feedback_get_depend_candidates_for_item($feedback, $item);

        $commonparams = array('cmid'=>$cm->id,

                             'id'=>isset($item->id) ? $item->id : null,

                             'typ'=>$item->typ,

                             'items'=>$feedbackitems,

                             'feedback'=>$feedback->id);

        //build the form

        $customdata = array('item' => $item,

                            'common' => $commonparams,

                            'positionlist' => $positionlist,

                            'position' => $position);

        $this->item_form = new feedback_numeric_form('edit_item.php', $customdata);

    }

    public function save_item() {

        global $DB;

        if (!$this->get_data()) {

            return false;

        }

        $item = $this->item;

        if (isset($item->clone_item) AND $item->clone_item) {

            $item->id = ''; //to clone this item

            $item->position++;

        }

        $item->hasvalue = $this->get_hasvalue();

        if (!$item->id) {

            $item->id = $DB->insert_record('feedback_item', $item);

        } else {

            $DB->update_record('feedback_item', $item);

        }

        return $DB->get_record('feedback_item', array('id'=>$item->id));

    }

    /**

     * Helper function for collected data, both for analysis page and export to excel

     *

     * @param stdClass $item the db-object from feedback_item

     * @param int $groupid

     * @param int $courseid

     * @return stdClass

     */

    protected function get_analysed($item, $groupid = false, $courseid = false) {

        global $DB;

        $analysed = new stdClass();

        $analysed->data = array();

        $analysed->name = $item->name;

        $values = feedback_get_group_values($item, $groupid, $courseid);

        $avg = 0.0;

        $counter = 0;

        if ($values) {

            $data = array();

            foreach ($values as $value) {

                if (is_numeric($value->value)) {

                    $data[] = $value->value;

                    $avg += $value->value;

                    $counter++;

                }

            }

            $avg = $counter > 0 ? $avg / $counter : null;

            $analysed->data = $data;

            $analysed->avg = $avg;

        }

        return $analysed;

    }

    public function get_printval($item, $value) {

        if (!isset($value->value)) {

            return '';

        }

        return $value->value;

    }

    public function print_analysed($item, $itemnr = '', $groupid = false, $courseid = false) {

        $values = $this->get_analysed($item, $groupid, $courseid);

        if (isset($values->data) AND is_array($values->data)) {

            echo "<table class=\"analysis itemtype_{$item->typ}\">";

            echo '<tr><th class="text-left">';

            echo $itemnr . ' ';

            if (strval($item->label) !== '') {

                echo '('. format_string($item->label).') ';

            }

            echo format_text($item->name, FORMAT_HTML, array('noclean' => true, 'para' => false));

            echo '</th></tr>';

            foreach ($values->data as $value) {

                echo '<tr><td class="singlevalue">';

                echo $this->format_float($value);

                echo '</td></tr>';

            }

            if (isset($values->avg)) {

                $avg = format_float($values->avg, 2);

            } else {

                $avg = '-';

            }

            echo '<tr><td><b>';

            echo get_string('average', 'feedback').': '.$avg;

            echo '</b></td></tr>';

            echo '</table>';

        }

    }

    public function excelprint_item(&$worksheet, $row_offset,

                             $xls_formats, $item,

                             $groupid, $courseid = false) {

        $analysed_item = $this->get_analysed($item, $groupid, $courseid);

        $worksheet->write_string($row_offset, 0, $item->label, $xls_formats->head2);

        $worksheet->write_string($row_offset, 1, $item->name, $xls_formats->head2);

        $data = $analysed_item->data;

        if (is_array($data)) {

            // Export average.

            $worksheet->write_string($row_offset,

                                     2,

                                     get_string('average', 'feedback'),

                                     $xls_formats->value_bold);

            if (isset($analysed_item->avg)) {

                $worksheet->write_number($row_offset + 1,

                                         2,

                                         $analysed_item->avg,

                                         $xls_formats->value_bold);

            } else {

                $worksheet->write_string($row_offset + 1,

                                         2,

                                         '',

                                         $xls_formats->value_bold);

            }

            $row_offset++;

        }

        $row_offset++;

        return $row_offset;

    }

    /**

     * Prints the float nicely in the localized format

     *

     * Similar to format_float() but automatically calculates the number of decimal places

     *

     * @param float $value The float to print

     * @return string

     */

    protected function format_float($value) {

        if (!is_numeric($value)) {

            return null;

        }

        $decimal = is_int($value) ? 0 : strlen(substr(strrchr($value, '.'), 1));

        return format_float($value, $decimal);

    }

    /**

     * Returns human-readable boundaries (min - max)

     * @param stdClass $item

     * @return string

     */

    protected function get_boundaries_for_display($item) {

        list($rangefrom, $rangeto) = explode('|', $item->presentation);

        if (!isset($rangefrom) || !is_numeric($rangefrom)) {

            $rangefrom = null;

        }

        if (!isset($rangeto) || !is_numeric($rangeto)) {

            $rangeto = null;

        }

        if (is_null($rangefrom) && is_numeric($rangeto)) {

            return ' (' . get_string('maximal', 'feedback') .

                        ': ' . $this->format_float($rangeto) . ')';

        }

        if (is_numeric($rangefrom) && is_null($rangeto)) {

            return ' (' . get_string('minimal', 'feedback') .

                        ': ' . $this->format_float($rangefrom) . ')';

        }

        if (is_null($rangefrom) && is_null($rangeto)) {

            return '';

        }

        return ' (' . $this->format_float($rangefrom) .

                ' - ' . $this->format_float($rangeto) . ')';

    }

    /**

     * Returns the postfix to be appended to the display name that is based on other settings

     *

     * @param stdClass $item

     * @return string

     */

    public function get_display_name_postfix($item) {

        return html_writer::span($this->get_boundaries_for_display($item), 'boundaries');

    }

    /**

     * Adds an input element to the complete form

     *

     * @param stdClass $item

     * @param mod_feedback_complete_form $form

     */

    public function complete_form_element($item, $form) {

        $name = $this->get_display_name($item);

        $inputname = $item->typ . '_' . $item->id;

        $form->add_form_element($item,

                ['text', $inputname, $name],

                true,

                false

                );

        $form->set_element_type($inputname, PARAM_NOTAGS);

        $tmpvalue = $this->format_float($form->get_item_value($item));

        $form->set_element_default($inputname, $tmpvalue);

        // Add form validation rule to check for boundaries.

        $form->add_validation_rule(function($values, $files) use ($item) {

            $inputname = $item->typ . '_' . $item->id;

            list($rangefrom, $rangeto) = explode('|', $item->presentation);

            if (!isset($values[$inputname]) || trim($values[$inputname]) === '') {

                return $item->required ? array($inputname => get_string('required')) : true;

            }

            $value = unformat_float($values[$inputname], true);

            if ($value === false) {

                return array($inputname => get_string('invalidnum', 'error'));

            }

            if ((is_numeric($rangefrom) && $value < floatval($rangefrom)) ||

                    (is_numeric($rangeto) && $value > floatval($rangeto))) {

                return array($inputname => get_string('numberoutofrange', 'feedback'));

            }

            return true;

        });

    }

    public function create_value($data) {

        $data = unformat_float($data, true);

        if (is_numeric($data)) {

            $data = floatval($data);

        } else {

            $data = '';

        }

        return $data;

    }

    /**

     * Return the analysis data ready for external functions.

     *

     * @param stdClass $item     the item (question) information

     * @param int      $groupid  the group id to filter data (optional)

     * @param int      $courseid the course id (optional)

     * @return array an array of data with non scalar types json encoded

     * @since  Moodle 3.3

     */

    public function get_analysed_for_external($item, $groupid = false, $courseid = false) {

        $externaldata = array();

        $data = $this->get_analysed($item, $groupid, $courseid);

        if (is_array($data->data)) {

            return $data->data; // No need to json, scalar type.

        }

        return $externaldata;

    }

}