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✏️ Editing: base_moodleform.class.php

<?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/>.

/**
 * This file contains the generic moodleform bridge for the backup user interface
 * as well as the individual forms that relate to the different stages the user
 * interface can exist within.
 *
 * @package   core_backup
 * @copyright 2010 Sam Hemelryk
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

require_once($CFG->libdir . '/formslib.php');

/**
 * Base moodleform bridge
 *
 * Ahhh the mighty moodleform bridge! Strong enough to take the weight of 682 full
 * grown african swallows all of whom have been carring coconuts for several days.
 * EWWWWW!!!!!!!!!!!!!!!!!!!!!!!!
 *
 * @package   core_backup
 * @copyright 2010 Sam Hemelryk
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
abstract class base_moodleform extends moodleform {

/**
     * The stage this form belongs to
     * @var base_ui_stage
     */
    protected $uistage = null;

/**
     * True if we have a course div open, false otherwise
     * @var bool
     */
    protected $coursediv = false;

/**
     * True if we have a section div open, false otherwise
     * @var bool
     */
    protected $sectiondiv = false;

/**
     * True if we have an activity div open, false otherwise
     * @var bool
     */
    protected $activitydiv = false;

/**
     * Creates the form
     *
     * @param base_ui_stage $uistage
     * @param moodle_url|string $action
     * @param mixed $customdata
     * @param string $method get|post
     * @param string $target
     * @param array $attributes
     * @param bool $editable
     */
    public function __construct(base_ui_stage $uistage, $action = null, $customdata = null, $method = 'post',
                                $target = '', $attributes = null, $editable = true) {
        $this->uistage = $uistage;
        // Add a class to the attributes to prevent the default collapsible behaviour.
        if (!$attributes) {
            $attributes = array();
        }
        $attributes['class'] = 'unresponsive';
        if (!isset($attributes['enctype'])) {
            $attributes['enctype'] = 'application/x-www-form-urlencoded'; // Enforce compatibility with our max_input_vars hack.
        }
        parent::__construct($action, $customdata, $method, $target, $attributes, $editable);
    }

/**
     * The standard form definition... obviously not much here
     */
    public function definition() {
        $ui = $this->uistage->get_ui();
        $mform = $this->_form;
        $mform->setDisableShortforms();
        $stage = $mform->addElement('hidden', 'stage', $this->uistage->get_stage());
        $mform->setType('stage', PARAM_INT);
        $stage = $mform->addElement('hidden', $ui->get_name(), $ui->get_uniqueid());
        $mform->setType($ui->get_name(), PARAM_ALPHANUM);
        $params = $this->uistage->get_params();
        if (is_array($params) && count($params) > 0) {
            foreach ($params as $name => $value) {
                // TODO: Horrible hack, but current backup ui structure does not allow
                // to make this easy (only changing params to objects that would be
                // possible. MDL-38735.
                $intparams = array(
                        'contextid', 'importid', 'target');
                $stage = $mform->addElement('hidden', $name, $value);
                if (in_array($name, $intparams)) {
                    $mform->setType($name, PARAM_INT);
                } else {
                    // Adding setType() to avoid missing setType() warnings.
                    // MDL-39126: support $mform->setType() for additional backup parameters.
                    $mform->setType($name, PARAM_RAW);
                }
            }
        }
    }
    /**
     * Definition applied after the data is organised.. why's it here? because I want
     * to add elements on the fly.
     * @global moodle_page $PAGE
     */
    public function definition_after_data() {
        $buttonarray = array();
        if (!$this->uistage->is_first_stage()) {
            $buttonarray[] = $this->_form->createElement('submit', 'previous', get_string('previousstage', 'backup'));
        } else if ($this->uistage instanceof backup_ui_stage) {
            // Only display the button on the first stage of backup, they only place where it has an effect.
            $buttonarray[] = $this->_form->createElement('submit', 'oneclickbackup', get_string('jumptofinalstep', 'backup'),
                array('class' => 'oneclickbackup'));
        }

$cancelparams = [
            'data-modal' => 'confirmation',
            'data-modal-content-str' => json_encode([
                'confirmcancelquestion',
                'backup',
            ]),
            'data-modal-yes-button-str' => json_encode([
                'yes',
                'moodle',
            ]),
        ];
        if ($this->uistage->get_ui() instanceof import_ui) {
            $cancelparams['data-modal-title-str'] = json_encode([
                'confirmcancelimport',
                'backup',
            ]);
        } else if ($this->uistage->get_ui() instanceof restore_ui) {
            $cancelparams['data-modal-title-str'] = json_encode([
                'confirmcancelrestore',
                'backup',
            ]);
        } else {
            $cancelparams['data-modal-title-str'] = json_encode([
                'confirmcancel',
                'backup',
            ]);
        }

$buttonarray[] = $this->_form->createElement('cancel', 'cancel', get_string('cancel'), $cancelparams);
        $buttonarray[] = $this->_form->createElement(
            'submit',
            'submitbutton',
            get_string($this->uistage->get_ui()->get_name().'stage'.$this->uistage->get_stage().'action', 'backup'),
            array('class' => 'proceedbutton')
        );
        $this->_form->addGroup($buttonarray, 'buttonar', '', array(' '), false);
        $this->_form->closeHeaderBefore('buttonar');

$this->_definition_finalized = true;
    }

/**
     * Closes any open divs
     */
    public function close_task_divs() {
        if ($this->activitydiv) {
            $this->_form->addElement('html', html_writer::end_tag('div'));
            $this->activitydiv = false;
        }
        if ($this->sectiondiv) {
            $this->_form->addElement('html', html_writer::end_tag('div'));
            $this->sectiondiv = false;
        }
        if ($this->coursediv) {
            $this->_form->addElement('html', html_writer::end_tag('div'));
            $this->coursediv = false;
        }
    }

/**
     * Adds the backup_setting as a element to the form
     * @param backup_setting $setting
     * @param base_task $task
     * @return bool
     */
    public function add_setting(backup_setting $setting, base_task $task = null) {
        return $this->add_settings(array(array($setting, $task)));
    }

/**
     * Adds multiple backup_settings as elements to the form
     * @param array $settingstasks Consists of array($setting, $task) elements
     * @return bool
     */
    public function add_settings(array $settingstasks) {
        global $OUTPUT;

// Determine highest setting level, which is displayed in this stage. This is relevant for considering only
        // locks of dependency settings for parent settings, which are not displayed in this stage.
        $highestlevel = backup_setting::ACTIVITY_LEVEL;
        foreach ($settingstasks as $st) {
            list($setting, $task) = $st;
            if ($setting->get_level() < $highestlevel) {
                $highestlevel = $setting->get_level();
            }
        }

$defaults = array();
        foreach ($settingstasks as $st) {
            list($setting, $task) = $st;
            // If the setting cant be changed or isn't visible then add it as a fixed setting.
            if (!$setting->get_ui()->is_changeable($highestlevel) ||
                $setting->get_visibility() != backup_setting::VISIBLE) {
                $this->add_fixed_setting($setting, $task);
                continue;
            }

// First add the formatting for this setting.
            $this->add_html_formatting($setting);

// Then call the add method with the get_element_properties array.
            call_user_func_array(array($this->_form, 'addElement'),
                array_values($setting->get_ui()->get_element_properties($task, $OUTPUT)));
            $this->_form->setType($setting->get_ui_name(), $setting->get_param_validation());
            $defaults[$setting->get_ui_name()] = $setting->get_value();
            if ($setting->has_help()) {
                list($identifier, $component) = $setting->get_help();
                $this->_form->addHelpButton($setting->get_ui_name(), $identifier, $component);
            }
            $this->_form->addElement('html', html_writer::end_tag('div'));
        }
        $this->_form->setDefaults($defaults);
        return true;
    }

/**
     * Adds a heading to the form
     * @param string $name
     * @param string $text
     */
    public function add_heading($name , $text) {
        $this->_form->addElement('header', $name, $text);
    }

/**
     * Adds HTML formatting for the given backup setting, needed to group/segment
     * correctly.
     * @param backup_setting $setting
     */
    protected function add_html_formatting(backup_setting $setting) {
        $mform = $this->_form;
        $isincludesetting = (strpos($setting->get_name(), '_include') !== false);
        if ($isincludesetting && $setting->get_level() != backup_setting::ROOT_LEVEL) {
            switch ($setting->get_level()) {
                case backup_setting::COURSE_LEVEL:
                    if ($this->activitydiv) {
                        $this->_form->addElement('html', html_writer::end_tag('div'));
                        $this->activitydiv = false;
                    }
                    if ($this->sectiondiv) {
                        $this->_form->addElement('html', html_writer::end_tag('div'));
                        $this->sectiondiv = false;
                    }
                    if ($this->coursediv) {
                        $this->_form->addElement('html', html_writer::end_tag('div'));
                    }
                    $mform->addElement('html', html_writer::start_tag('div', array('class' => 'grouped_settings course_level')));
                    $mform->addElement('html', html_writer::start_tag('div', array('class' => 'include_setting course_level')));
                    $this->coursediv = true;
                    break;
                case backup_setting::SECTION_LEVEL:
                    if ($this->activitydiv) {
                        $this->_form->addElement('html', html_writer::end_tag('div'));
                        $this->activitydiv = false;
                    }
                    if ($this->sectiondiv) {
                        $this->_form->addElement('html', html_writer::end_tag('div'));
                    }
                    $mform->addElement('html', html_writer::start_tag('div', array('class' => 'grouped_settings section_level')));
                    $mform->addElement('html', html_writer::start_tag('div', array('class' => 'include_setting section_level')));
                    $this->sectiondiv = true;
                    break;
                case backup_setting::ACTIVITY_LEVEL:
                    if ($this->activitydiv) {
                        $this->_form->addElement('html', html_writer::end_tag('div'));
                    }
                    $mform->addElement('html', html_writer::start_tag('div', array('class' => 'grouped_settings activity_level')));
                    $mform->addElement('html', html_writer::start_tag('div', array('class' => 'include_setting activity_level')));
                    $this->activitydiv = true;
                    break;
                default:
                    $mform->addElement('html', html_writer::start_tag('div', array('class' => 'normal_setting')));
                    break;
            }
        } else if ($setting->get_level() == backup_setting::ROOT_LEVEL) {
            $mform->addElement('html', html_writer::start_tag('div', array('class' => 'root_setting')));
        } else {
            $mform->addElement('html', html_writer::start_tag('div', array('class' => 'normal_setting')));
        }
    }

/**
     * Adds a fixed or static setting to the form
     * @param backup_setting $setting
     * @param base_task $task
     */
    public function add_fixed_setting(backup_setting $setting, base_task $task) {
        global $OUTPUT;
        $settingui = $setting->get_ui();
        if ($setting->get_visibility() == backup_setting::VISIBLE) {
            $this->add_html_formatting($setting);
            switch ($setting->get_status()) {
                case backup_setting::LOCKED_BY_PERMISSION:
                    $icon = ' '.$OUTPUT->pix_icon('i/permissionlock', get_string('lockedbypermission', 'backup'), 'moodle',
                            array('class' => 'smallicon lockedicon permissionlock'));
                    break;
                case backup_setting::LOCKED_BY_CONFIG:
                    $icon = ' '.$OUTPUT->pix_icon('i/configlock', get_string('lockedbyconfig', 'backup'), 'moodle',
                            array('class' => 'smallicon lockedicon configlock'));
                    break;
                case backup_setting::LOCKED_BY_HIERARCHY:
                    $icon = ' '.$OUTPUT->pix_icon('i/hierarchylock', get_string('lockedbyhierarchy', 'backup'), 'moodle',
                            array('class' => 'smallicon lockedicon configlock'));
                    break;
                default:
                    $icon = '';
                    break;
            }
            $context = context_course::instance($task->get_courseid());
            $label = format_string($settingui->get_label($task), true, array('context' => $context));
            $labelicon = $settingui->get_icon();
            if (!empty($labelicon)) {
                $label .= $OUTPUT->render($labelicon);
            }
            $this->_form->addElement('static', 'static_'.$settingui->get_name(), $label, $settingui->get_static_value().$icon);
            $this->_form->addElement('html', html_writer::end_tag('div'));
        }
        $this->_form->addElement('hidden', $settingui->get_name(), $settingui->get_value());
        $this->_form->setType($settingui->get_name(), $settingui->get_param_validation());
    }

/**
     * Adds dependencies to the form recursively
     *
     * @param backup_setting $setting
     */
    public function add_dependencies(backup_setting $setting) {
        $mform = $this->_form;
        // Apply all dependencies for backup.
        foreach ($setting->get_my_dependency_properties() as $key => $dependency) {
            call_user_func_array(array($this->_form, 'disabledIf'), array_values($dependency));
        }
    }

/**
     * Returns true if the form was cancelled, false otherwise
     * @return bool
     */
    public function is_cancelled() {
        return (optional_param('cancel', false, PARAM_BOOL) || parent::is_cancelled());
    }

/**
     * Removes an element from the form if it exists
     * @param string $elementname
     * @return bool
     */
    public function remove_element($elementname) {
        if ($this->_form->elementExists($elementname)) {
            return $this->_form->removeElement($elementname);
        } else {
            return false;
        }
    }

/**
     * Gets an element from the form if it exists
     *
     * @param string $elementname
     * @return HTML_QuickForm_input|MoodleQuickForm_group
     */
    public function get_element($elementname) {
        if ($this->_form->elementExists($elementname)) {
            return $this->_form->getElement($elementname);
        } else {
            return false;
        }
    }

/**
     * Displays the form
     */
    public function display() {
        global $PAGE, $COURSE;

$this->require_definition_after_data();

// Get list of module types on course.
        $modinfo = get_fast_modinfo($COURSE);
        $modnames = array_map('strval', $modinfo->get_used_module_names(true));
        core_collator::asort($modnames);
        $PAGE->requires->yui_module('moodle-backup-backupselectall', 'M.core_backup.backupselectall',
                array($modnames));
        $PAGE->requires->strings_for_js(array('select', 'all', 'none'), 'moodle');
        $PAGE->requires->strings_for_js(array('showtypes', 'hidetypes'), 'backup');

parent::display();
    }

/**
     * Ensures the the definition after data is loaded
     */
    public function require_definition_after_data() {
        if (!$this->_definition_finalized) {
            $this->definition_after_data();
        }
    }
}

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