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/>.

namespace tool_usertours;

use context_system;

use stdClass;

/**

 * Step class.

 *

 * @package    tool_usertours

 * @copyright  2016 Andrew Nicols <andrew@nicols.co.uk>

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

 */

class step {

    /**

     * @var     int     $id         The id of the step.

     */

    protected $id;

    /**

     * @var     int     $tourid     The id of the tour that this step belongs to.

     */

    protected $tourid;

    /**

     * @var     tour    $tour       The tour class that this step belongs to.

     */

    protected $tour;

    /**

     * @var     string  $title      The title of the step.

     */

    protected $title;

    /**

     * @var     string  $content    The content of this step.

     */

    protected $content;

    /**

     * @var     int  $contentformat    The content format: FORMAT_MOODLE/FORMAT_HTML/FORMAT_PLAIN/FORMAT_MARKDOWN.

     */

    protected $contentformat;

    /**

     * @var     int     $targettype The type of target.

     */

    protected $targettype;

    /**

     * @var     string  $targetvalue    The value for this type of target.

     */

    protected $targetvalue;

    /**

     * @var     int     $sortorder  The sort order.

     */

    protected $sortorder;

    /**

     * @var     object  $config     The configuration as an object.

     */

    protected $config;

    /**

     * @var     bool    $dirty      Whether the step has been changed since it was loaded

     */

    protected $dirty = false;

    /**

     * @var bool $isimporting Whether the step is being imported or not.

     */

    protected $isimporting;

    /**

     * @var stdClass[] $files The list of attached files for this step.

     */

    protected $files = [];

    /**

     * Fetch the step instance.

     *

     * @param   int             $id         The id of the step to be retrieved.

     * @return  step

     */

    public static function instance($id) {

        $step = new step();

        return $step->fetch($id);

    }

    /**

     * Load the step instance.

     *

     * @param stdClass $record The step record to be loaded.

     * @param bool $clean Clean the values.

     * @param bool $isimporting Whether the step is being imported or not.

     * @return step

     */

    public static function load_from_record($record, $clean = false, bool $isimporting = false) {

        $step = new self();

        $step->set_importing($isimporting);

        return $step->reload_from_record($record, $clean);

    }

    /**

     * Fetch the step instance.

     *

     * @param   int             $id         The id of the step to be retrieved.

     * @return  step

     */

    protected function fetch($id) {

        global $DB;

        return $this->reload_from_record(

            $DB->get_record('tool_usertours_steps', ['id' => $id])

        );

    }

    /**

     * Refresh the current step from the datbase.

     *

     * @return  step

     */

    protected function reload() {

        return $this->fetch($this->id);

    }

    /**

     * Reload the current step from the supplied record.

     *

     * @param stdClass $record The step record to be loaded.

     * @param bool $clean Clean the values.

     * @return step

     */

    protected function reload_from_record($record, $clean = false) {

        $this->id           = $record->id;

        $this->tourid       = $record->tourid;

        if ($clean) {

            $this->title    = clean_param($record->title, PARAM_TEXT);

            $this->content  = clean_text($record->content);

        } else {

            $this->title    = $record->title;

            $this->content  = $record->content;

        }

        $this->contentformat = isset($record->contentformat) ? $record->contentformat : FORMAT_MOODLE;

        $this->targettype   = $record->targettype;

        $this->targetvalue  = $record->targetvalue;

        $this->sortorder    = $record->sortorder;

        $this->config       = json_decode($record->configdata);

        $this->dirty        = false;

        if ($this->isimporting && isset($record->files)) {

            // We are importing/exporting the step.

            $this->files = $record->files;

        }

        return $this;

    }

    /**

     * Set the import state for the step.

     *

     * @param bool $isimporting True if the step is imported, otherwise false.

     * @return void

     */

    protected function set_importing(bool $isimporting = false): void {

        $this->isimporting = $isimporting;

    }

    /**

     * Get the ID of the step.

     *

     * @return  int

     */

    public function get_id() {

        return $this->id;

    }

    /**

     * Get the Tour ID of the step.

     *

     * @return  int

     */

    public function get_tourid() {

        return $this->tourid;

    }

    /**

     * Get the Tour instance that this step belongs to.

     *

     * @return  tour

     */

    public function get_tour() {

        if ($this->tour === null) {

            $this->tour = tour::instance($this->tourid);

        }

        return $this->tour;

    }

    /**

     * Set the id of the tour.

     *

     * @param   int             $value      The id of the tour.

     * @return  self

     */

    public function set_tourid($value) {

        $this->tourid = $value;

        $this->tour = null;

        $this->dirty = true;

        return $this;

    }

    /**

     * Get the Title of the step.

     *

     * @return  string

     */

    public function get_title() {

        return $this->title;

    }

    /**

     * Set the title for this step.

     *

     * @param   string      $value      The new title to use.

     * @return  $this

     */

    public function set_title($value) {

        $this->title = clean_text($value);

        $this->dirty = true;

        return $this;

    }

    /**

     * Get the content format of the step.

     *

     * @return  int

     */

    public function get_contentformat(): int {

        return $this->contentformat;

    }

    /**

     * Get the body content of the step.

     *

     * @return  string

     */

    public function get_content() {

        return $this->content;

    }

    /**

     * Set the content value for this step.

     *

     * @param   string      $value      The new content to use.

     * @param   int         $format     The new format to use: FORMAT_MOODLE/FORMAT_HTML/FORMAT_PLAIN/FORMAT_MARKDOWN.

     * @return  $this

     */

    public function set_content($value, $format = FORMAT_HTML) {

        $this->content = clean_text($value);

        $this->contentformat = $format;

        $this->dirty = true;

        return $this;

    }

    /**

     * Get the content value for this step.

     *

     * @return  string

     */

    public function get_targettype() {

        return $this->targettype;

    }

    /**

     * Set the type of target for this step.

     *

     * @param   string      $value      The new target to use.

     * @return  $this

     */

    public function set_targettype($value) {

        $this->targettype = $value;

        $this->dirty = true;

        return $this;

    }

    /**

     * Get the target value for this step.

     *

     * @return  string

     */

    public function get_targetvalue() {

        return $this->targetvalue;

    }

    /**

     * Set the target value for this step.

     *

     * @param   string      $value      The new target value to use.

     * @return  $this

     */

    public function set_targetvalue($value) {

        $this->targetvalue = $value;

        $this->dirty = true;

        return $this;

    }

    /**

     * Get the target instance for this step.

     *

     * @return  target

     */

    public function get_target() {

        return target::get_target_instance($this);

    }

    /**

     * Get the current sortorder for this step.

     *

     * @return  int

     */

    public function get_sortorder() {

        return (int) $this->sortorder;

    }

    /**

     * Whether this step is the first step in the tour.

     *

     * @return  boolean

     */

    public function is_first_step() {

        return ($this->get_sortorder() === 0);

    }

    /**

     * Whether this step is the last step in the tour.

     *

     * @return  boolean

     */

    public function is_last_step() {

        $stepcount = $this->get_tour()->count_steps();

        return ($this->get_sortorder() === $stepcount - 1);

    }

    /**

     * Set the sortorder for this step.

     *

     * @param   int         $value      The new sortorder to use.

     * @return  $this

     */

    public function set_sortorder($value) {

        $this->sortorder = $value;

        $this->dirty = true;

        return $this;

    }

    /**

     * Get the link to move this step up in the sortorder.

     *

     * @return  \moodle_url

     */

    public function get_moveup_link() {

        return helper::get_move_step_link($this->get_id(), helper::MOVE_UP);

    }

    /**

     * Get the link to move this step down in the sortorder.

     *

     * @return  \moodle_url

     */

    public function get_movedown_link() {

        return helper::get_move_step_link($this->get_id(), helper::MOVE_DOWN);

    }

    /**

     * Get the value of the specified configuration item.

     *

     * If notvalue was found, and no default was specified, the default for the tour will be used.

     *

     * @param   string      $key        The configuration key to set.

     * @param   mixed       $default    The default value to use if a value was not found.

     * @return  mixed

     */

    public function get_config($key = null, $default = null) {

        if ($this->config === null) {

            $this->config = (object) [];

        }

        if ($key === null) {

            return $this->config;

        }

        if ($this->get_targettype() !== null) {

            $target = $this->get_target();

            if ($target->is_setting_forced($key)) {

                return $target->get_forced_setting_value($key);

            }

        }

        if (property_exists($this->config, $key)) {

            return $this->config->$key;

        }

        if ($default !== null) {

            return $default;

        }

        return $this->get_tour()->get_config($key);

    }

    /**

     * Set the configuration item as specified.

     *

     * @param   string      $key        The configuration key to set.

     * @param   mixed       $value      The new value for the configuration item.

     * @return  $this

     */

    public function set_config($key, $value) {

        if ($this->config === null) {

            $this->config = (object) [];

        }

        if ($value === null) {

            unset($this->config->$key);

        } else {

            $this->config->$key = $value;

        }

        $this->dirty = true;

        return $this;

    }

    /**

     * Get the edit link for this step.

     *

     * @return  \moodle_url

     */

    public function get_edit_link() {

        return helper::get_edit_step_link($this->tourid, $this->id);

    }

    /**

     * Get the delete link for this step.

     *

     * @return  \moodle_url

     */

    public function get_delete_link() {

        return helper::get_delete_step_link($this->id);

    }

    /**

     * Embed attached file to the json file for step.

     *

     * @return array List of files.

     */

    protected function embed_files(): array {

        $systemcontext = context_system::instance();

        $fs = get_file_storage();

        $areafiles = $fs->get_area_files($systemcontext->id, 'tool_usertours', 'stepcontent', $this->id);

        $files = [];

        foreach ($areafiles as $file) {

            if ($file->is_directory()) {

                continue;

            }

            $files[] = [

                'name' => $file->get_filename(),

                'path' => $file->get_filepath(),

                'content' => base64_encode($file->get_content()),

                'encode' => 'base64',

            ];

        }

        return $files;

    }

    /**

     * Get the embed files information and create store_file for this step.

     *

     * @return void

     */

    protected function extract_files() {

        $fs = get_file_storage();

        $systemcontext = context_system::instance();

        foreach ($this->files as $file) {

            $filename = $file->name;

            $filepath = $file->path;

            $filecontent = $file->content;

            $filerecord = [

                'contextid' => $systemcontext->id,

                'component' => 'tool_usertours',

                'filearea' => 'stepcontent',

                'itemid' => $this->get_id(),

                'filepath' => $filepath,

                'filename' => $filename,

            ];

            $fs->create_file_from_string($filerecord, base64_decode($filecontent));

        }

    }

    /**

     * Prepare this step for saving to the database.

     *

     * @param bool $isexporting Whether the step is being exported or not.

     * @return  object

     */

    public function to_record(bool $isexporting = false) {

        $record = [

            'id'            => $this->id,

            'tourid'        => $this->tourid,

            'title'         => $this->title,

            'content'       => $this->content,

            'contentformat' => $this->contentformat,

            'targettype'    => $this->targettype,

            'targetvalue'   => $this->targetvalue,

            'sortorder'     => $this->sortorder,

            'configdata'    => json_encode($this->config),

        ];

        if ($isexporting) {

            // We are exporting the step, adding files node to the json record.

            $record['files'] = $this->embed_files();

        }

        return (object) $record;

    }

    /**

     * Calculate the next sort-order value.

     *

     * @return  int

     */

    protected function calculate_sortorder() {

        $count = $this->get_tour()->count_steps();

        $this->sortorder = $count;

        return $this;

    }

    /**

     * Save the tour and it's configuration to the database.

     *

     * @param   boolean     $force      Whether to force writing to the database.

     * @return  $this

     */

    public function persist($force = false) {

        global $CFG, $DB;

        require_once("{$CFG->libdir}/filelib.php");

        if (!$this->dirty && !$force) {

            return $this;

        }

        if ($this->id) {

            $record = $this->to_record();

            $DB->update_record('tool_usertours_steps', $record);

        } else {

            $this->calculate_sortorder();

            $record = $this->to_record();

            unset($record->id);

            $this->id = $DB->insert_record('tool_usertours_steps', $record);

            $this->get_tour()->reset_step_sortorder();

        }

        $systemcontext = context_system::instance();

        if ($draftid = file_get_submitted_draft_itemid('content')) {

            // Take any files added to the stepcontent draft file area and

            // convert them into the proper event description file area. Also

            // parse the content text and replace the URLs to the draft files

            // with the @@PLUGIN_FILE@@ placeholder to be persisted in the DB.

            $this->content = file_save_draft_area_files(

                $draftid,

                $systemcontext->id,

                'tool_usertours',

                'stepcontent',

                $this->id,

                ['subdirs' => true],

                $this->content

            );

            $DB->set_field('tool_usertours_steps', 'content', $this->content, ['id' => $this->id]);

        }

        if ($this->isimporting) {

            // We are importing the step, we need to create store_file from the json record.

            $this->extract_files();

        }

        $this->reload();

        // Notify of a change to the step configuration.

        // This must be done separately to tour change notifications.

        cache::notify_step_change($this->get_tourid());

        // Notify the cache that a tour has changed.

        // Tours are only stored in the cache if there are steps.

        // If there step count has changed for some reason, this will change the potential cache results.

        cache::notify_tour_change();

        return $this;

    }

    /**

     * Remove this step.

     */

    public function remove() {

        global $DB;

        if ($this->id === null) {

            return;

        }

        $DB->delete_records('tool_usertours_steps', ['id' => $this->id]);

        $this->get_tour()->reset_step_sortorder();

        // Notify of a change to the step configuration.

        // This must be done separately to tour change notifications.

        cache::notify_step_change($this->get_id());

        // Notify the cache that a tour has changed.

        // Tours are only stored in the cache if there are steps.

        // If there step count has changed for some reason, this will change the potential cache results.

        cache::notify_tour_change();

    }

    /**

     * Get the list of possible placement options.

     *

     * @return  array

     */

    public function get_placement_options() {

        return configuration::get_placement_options(true);

    }

    /**

     * The list of possible configuration keys.

     *

     * @return  array

     */

    public static function get_config_keys() {

        return [

            'placement',

            'orphan',

            'backdrop',

            'reflex',

        ];

    }

    /**

     * Add the step configuration to the form.

     *

     * @param   \MoodleQuickForm $mform     The form to add configuration to.

     * @return  $this

     */

    public function add_config_to_form(\MoodleQuickForm $mform) {

        $tour = $this->get_tour();

        $options = configuration::get_placement_options($tour->get_config('placement'));

        $mform->addElement('select', 'placement', get_string('placement', 'tool_usertours'), $options);

        $mform->addHelpButton('placement', 'placement', 'tool_usertours');

        $this->add_config_field_to_form($mform, 'orphan');

        $this->add_config_field_to_form($mform, 'backdrop');

        $this->add_config_field_to_form($mform, 'reflex');

        return $this;

    }

    /**

     * Add the specified step field configuration to the form.

     *

     * @param   \MoodleQuickForm $mform     The form to add configuration to.

     * @param   string          $key        The key to add.

     * @return  $this

     */

    public function add_config_field_to_form(\MoodleQuickForm $mform, $key) {

        $tour = $this->get_tour();

        $default = (bool) $tour->get_config($key);

        $options = [

            true    => get_string('yes'),

            false   => get_string('no'),

        ];

        if (!isset($options[$default])) {

            $default = configuration::get_default_value($key);

        }

        $options = array_reverse($options, true);

        $options[configuration::TOURDEFAULT] = get_string('defaultvalue', 'tool_usertours', $options[$default]);

        $options = array_reverse($options, true);

        $mform->addElement('select', $key, get_string($key, 'tool_usertours'), $options);

        $mform->setDefault($key, configuration::TOURDEFAULT);

        $mform->addHelpButton($key, $key, 'tool_usertours');

        return $this;

    }

    /**

     * Prepare the configuration data for the moodle form.

     *

     * @return  object

     */

    public function prepare_data_for_form() {

        global $CFG;

        require_once("{$CFG->libdir}/filelib.php");

        $data = $this->to_record();

        foreach (self::get_config_keys() as $key) {

            $data->$key = $this->get_config($key, configuration::get_step_default_value($key));

        }

        if ($this->get_targettype() !== null) {

            $this->get_target()->prepare_data_for_form($data);

        }

        // Prepare content for editing in a form 'editor' field type.

        $draftitemid = file_get_submitted_draft_itemid('tool_usertours');

        $systemcontext = context_system::instance();

        $data->content = [

            'format' => $data->contentformat,

            'itemid' => $draftitemid,

            'text' => file_prepare_draft_area(

                $draftitemid,

                $systemcontext->id,

                'tool_usertours',

                'stepcontent',

                $this->id,

                ['subdirs' => true],

                $data->content

            ),

        ];

        return $data;

    }

    /**

     * Handle submission of the step editing form.

     *

     * @param   local\forms\editstep  $mform      The sumitted form.

     * @param   stdClass        $data       The submitted data.

     * @return  $this

     */

    public function handle_form_submission(local\forms\editstep &$mform, stdClass $data) {

        $this->set_title($data->title);

        $this->set_content($data->content['text'], $data->content['format']);

        $this->set_targettype($data->targettype);

        $this->set_targetvalue($this->get_target()->get_value_from_form($data));

        foreach (self::get_config_keys() as $key) {

            if (!$this->get_target()->is_setting_forced($key)) {

                if (isset($data->$key)) {

                    $value = $data->$key;

                } else {

                    $value = configuration::TOURDEFAULT;

                }

                if ($value === configuration::TOURDEFAULT) {

                    $this->set_config($key, null);

                } else {

                    $this->set_config($key, $value);

                }

            }

        }

        $this->persist();

        return $this;

    }

    /**

     * Attempt to fetch any matching langstring if the string is in the

     * format identifier,component.

     *

     * @deprecated since Moodle 4.0 MDL-72783. Please use helper::get_string_from_input() instead.

     * @param   string  $string

     * @return  string

     */

    public static function get_string_from_input($string) {

        debugging('Use of ' . __FUNCTION__ .

            '() have been deprecated, please update your code to use helper::get_string_from_input()', DEBUG_DEVELOPER);

        return helper::get_string_from_input($string);

    }

    /**

     * Attempt to replace PIXICON placeholder with the correct images for tour step content.

     *

     * @param string $content Tour content

     * @return string Processed tour content

     */

    public static function get_step_image_from_input(string $content): string {

        if (strpos($content, '@@PIXICON') === false) {

            return $content;

        }

        $content = preg_replace_callback(

            '%@@PIXICON::(?P<identifier>([^::]*))::(?P<component>([^@@]*))@@%',

            function (array $matches) {

                global $OUTPUT;

                $component = $matches['component'];

                if ($component == 'moodle') {

                    $component = 'core';

                }

                return \html_writer::img(

                    $OUTPUT->image_url($matches['identifier'], $component)->out(false),

                    '',

                    ['class' => 'img-fluid']

                );

            },

            $content

        );

        return $content;

    }

}