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/>.

/**

 * This file contains main class for the course format Weeks

 *

 * @since     Moodle 2.0

 * @package   format_weeks

 * @copyright 2009 Sam Hemelryk

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

 */

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

require_once($CFG->dirroot. '/course/format/lib.php');

require_once($CFG->dirroot. '/course/lib.php');

/**

 * Main class for the Weeks course format

 *

 * @package    format_weeks

 * @copyright  2012 Marina Glancy

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

 */

class format_weeks extends core_courseformat\base {

    /**

     * Returns true if this course format uses sections

     *

     * @return bool

     */

    public function uses_sections() {

        return true;

    }

    public function uses_course_index() {

        return true;

    }

    public function uses_indentation(): bool {

        return (get_config('format_weeks', 'indentation')) ? true : false;

    }

    /**

     * Generate the title for this section page

     * @return string the page title

     */

    public function page_title(): string {

        return get_string('sectionoutline');

    }

    /**

     * Returns the display name of the given section that the course prefers.

     *

     * @param int|stdClass $section Section object from database or just field section.section

     * @return string Display name that the course format prefers, e.g. "Topic 2"

     */

    public function get_section_name($section) {

        $section = $this->get_section($section);

        if ((string)$section->name !== '') {

            // Return the name the user set.

            return format_string($section->name, true, array('context' => context_course::instance($this->courseid)));

        } else {

            return $this->get_default_section_name($section);

        }

    }

    /**

     * Returns the default section name for the weekly course format.

     *

     * If the section number is 0, it will use the string with key = section0name from the course format's lang file.

     * Otherwise, the default format of "[start date] - [end date]" will be returned.

     *

     * @param stdClass $section Section object from database or just field course_sections section

     * @return string The default value for the section name.

     */

    public function get_default_section_name($section) {

        if ($section->section == 0) {

            // Return the general section.

            return get_string('section0name', 'format_weeks');

        } else {

            $dates = $this->get_section_dates($section);

            // Find the prior day for display purposes.

            $enddate = new DateTime();

            $enddate->setTimezone(core_date::get_user_timezone_object());

            $enddate->setTimestamp(intval($dates->end));

            $enddate->modify('-1 day');

            $dates->end = $enddate->getTimestamp();

            $dateformat = get_string('strftimedateshort');

            $weekday = userdate($dates->start, $dateformat);

            $endweekday = userdate($dates->end, $dateformat);

            return $weekday.' - '.$endweekday;

        }

    }

    /**

     * Returns the name for the highlighted section.

     *

     * @return string The name for the highlighted section based on the given course format.

     */

    public function get_section_highlighted_name(): string {

        return get_string('currentsection', 'format_weeks');

    }

    /**

     * The URL to use for the specified course (with section)

     *

     * @param int|stdClass $section Section object from database or just field course_sections.section

     *     if omitted the course view page is returned

     * @param array $options options for view URL. At the moment core uses:

     *     'navigation' (bool) if true and section not empty, the function returns section page; otherwise, it returns course page.

     *     'sr' (int) used by course formats to specify to which section to return

     * @return null|moodle_url

     */

    public function get_view_url($section, $options = array()) {

        $course = $this->get_course();

        if (array_key_exists('sr', $options) && !is_null($options['sr'])) {

            $sectionno = $options['sr'];

        } else if (is_object($section)) {

            $sectionno = $section->section;

        } else {

            $sectionno = $section;

        }

        if ((!empty($options['navigation']) || array_key_exists('sr', $options)) && $sectionno !== null) {

            // Display section on separate page.

            $sectioninfo = $this->get_section($sectionno);

            return new moodle_url('/course/section.php', ['id' => $sectioninfo->id]);

        }

        return new moodle_url('/course/view.php', ['id' => $course->id]);

    }

    /**

     * Returns the information about the ajax support in the given source format

     *

     * The returned object's property (boolean)capable indicates that

     * the course format supports Moodle course ajax features.

     *

     * @return stdClass

     */

    public function supports_ajax() {

        $ajaxsupport = new stdClass();

        $ajaxsupport->capable = true;

        return $ajaxsupport;

    }

    public function supports_components() {

        return true;

    }

    /**

     * Loads all of the course sections into the navigation

     *

     * @param global_navigation $navigation

     * @param navigation_node $node The course node within the navigation

     */

    public function extend_course_navigation($navigation, navigation_node $node) {

        global $PAGE;

        // if section is specified in course/view.php, make sure it is expanded in navigation

        if ($navigation->includesectionnum === false) {

            $selectedsection = optional_param('section', null, PARAM_INT);

            if ($selectedsection !== null && (!defined('AJAX_SCRIPT') || AJAX_SCRIPT == '0') &&

                    $PAGE->url->compare(new moodle_url('/course/view.php'), URL_MATCH_BASE)) {

                $navigation->includesectionnum = $selectedsection;

            }

        }

        parent::extend_course_navigation($navigation, $node);

        // We want to remove the general section if it is empty.

        $modinfo = get_fast_modinfo($this->get_course());

        $sections = $modinfo->get_sections();

        if (!isset($sections[0])) {

            // The general section is empty to find the navigation node for it we need to get its ID.

            $section = $modinfo->get_section_info(0);

            $generalsection = $node->get($section->id, navigation_node::TYPE_SECTION);

            if ($generalsection) {

                // We found the node - now remove it.

                $generalsection->remove();

            }

        }

    }

    /**

     * Custom action after section has been moved in AJAX mode

     *

     * Used in course/rest.php

     *

     * @return array This will be passed in ajax respose

     */

    function ajax_section_move() {

        global $PAGE;

        $titles = array();

        $current = -1;

        $course = $this->get_course();

        $modinfo = get_fast_modinfo($course);

        $renderer = $this->get_renderer($PAGE);

        if ($renderer && ($sections = $modinfo->get_section_info_all())) {

            foreach ($sections as $number => $section) {

                $titles[$number] = $renderer->section_title($section, $course);

                if ($this->is_section_current($section)) {

                    $current = $number;

                }

            }

        }

        return array('sectiontitles' => $titles, 'current' => $current, 'action' => 'move');

    }

    /**

     * Returns the list of blocks to be automatically added for the newly created course

     *

     * @return array of default blocks, must contain two keys BLOCK_POS_LEFT and BLOCK_POS_RIGHT

     *     each of values is an array of block names (for left and right side columns)

     */

    public function get_default_blocks() {

        return array(

            BLOCK_POS_LEFT => array(),

            BLOCK_POS_RIGHT => array()

        );

    }

    /**

     * Definitions of the additional options that this course format uses for course

     *

     * Weeks format uses the following options:

     * - coursedisplay

     * - hiddensections

     * - automaticenddate

     *

     * @param bool $foreditform

     * @return array of options

     */

    public function course_format_options($foreditform = false) {

        static $courseformatoptions = false;

        if ($courseformatoptions === false) {

            $courseconfig = get_config('moodlecourse');

            $courseformatoptions = array(

                'hiddensections' => array(

                    'default' => $courseconfig->hiddensections,

                    'type' => PARAM_INT,

                ),

                'coursedisplay' => array(

                    'default' => $courseconfig->coursedisplay ?? COURSE_DISPLAY_SINGLEPAGE,

                    'type' => PARAM_INT,

                ),

                'automaticenddate' => array(

                    'default' => 1,

                    'type' => PARAM_BOOL,

                ),

            );

        }

        if ($foreditform && !isset($courseformatoptions['coursedisplay']['label'])) {

            $courseformatoptionsedit = array(

                'hiddensections' => array(

                    'label' => new lang_string('hiddensections'),

                    'help' => 'hiddensections',

                    'help_component' => 'moodle',

                    'element_type' => 'select',

                    'element_attributes' => array(

                        array(

                            1 => new lang_string('hiddensectionsinvisible')

                        )

                    ),

                ),

                'coursedisplay' => array(

                    'label' => new lang_string('coursedisplay'),

                    'element_type' => 'select',

                    'element_attributes' => array(

                        array(

                            COURSE_DISPLAY_SINGLEPAGE => new lang_string('coursedisplay_single'),

                            COURSE_DISPLAY_MULTIPAGE => new lang_string('coursedisplay_multi')

                        )

                    ),

                    'help' => 'coursedisplay',

                    'help_component' => 'moodle',

                ),

                'automaticenddate' => array(

                    'label' => new lang_string('automaticenddate', 'format_weeks'),

                    'help' => 'automaticenddate',

                    'help_component' => 'format_weeks',

                    'element_type' => 'advcheckbox',

                )

            );

            $courseformatoptions = array_merge_recursive($courseformatoptions, $courseformatoptionsedit);

        }

        return $courseformatoptions;

    }

    /**

     * Adds format options elements to the course/section edit form.

     *

     * This function is called from {@link course_edit_form::definition_after_data()}.

     *

     * @param MoodleQuickForm $mform form the elements are added to.

     * @param bool $forsection 'true' if this is a section edit form, 'false' if this is course edit form.

     * @return array array of references to the added form elements.

     */

    public function create_edit_form_elements(&$mform, $forsection = false) {

        global $COURSE;

        $elements = parent::create_edit_form_elements($mform, $forsection);

        if (!$forsection && (empty($COURSE->id) || $COURSE->id == SITEID)) {

            // Add "numsections" element to the create course form - it will force new course to be prepopulated

            // with empty sections.

            // The "Number of sections" option is no longer available when editing course, instead teachers should

            // delete and add sections when needed.

            $courseconfig = get_config('moodlecourse');

            $max = (int)$courseconfig->maxsections;

            $element = $mform->addElement('select', 'numsections', get_string('numberweeks'), range(0, $max ?: 52));

            $mform->setType('numsections', PARAM_INT);

            if (is_null($mform->getElementValue('numsections'))) {

                $mform->setDefault('numsections', $courseconfig->numsections);

            }

            array_unshift($elements, $element);

        }

        // Re-order things.

        $mform->insertElementBefore($mform->removeElement('automaticenddate', false), 'idnumber');

        $mform->disabledIf('enddate', 'automaticenddate', 'checked');

        foreach ($elements as $key => $element) {

            if ($element->getName() == 'automaticenddate') {

                unset($elements[$key]);

            }

        }

        return $elements;

    }

    /**

     * Updates format options for a course

     *

     * In case if course format was changed to 'weeks', we try to copy options

     * 'coursedisplay', 'numsections' and 'hiddensections' from the previous format.

     * If previous course format did not have 'numsections' option, we populate it with the

     * current number of sections

     *

     * @param stdClass|array $data return value from {@link moodleform::get_data()} or array with data

     * @param stdClass $oldcourse if this function is called from {@link update_course()}

     *     this object contains information about the course before update

     * @return bool whether there were any changes to the options values

     */

    public function update_course_format_options($data, $oldcourse = null) {

        global $DB;

        $data = (array)$data;

        if ($oldcourse !== null) {

            $oldcourse = (array)$oldcourse;

            $options = $this->course_format_options();

            foreach ($options as $key => $unused) {

                if (!array_key_exists($key, $data)) {

                    if (array_key_exists($key, $oldcourse)) {

                        $data[$key] = $oldcourse[$key];

                    }

                }

            }

        }

        return $this->update_format_options($data);

    }

    /**

     * Return the start and end date of the passed section

     *

     * @param int|stdClass|section_info $section section to get the dates for

     * @param int $startdate Force course start date, useful when the course is not yet created

     * @return stdClass property start for startdate, property end for enddate

     */

    public function get_section_dates($section, $startdate = false) {

        global $USER;

        if ($startdate === false) {

            $course = $this->get_course();

            $userdates = course_get_course_dates_for_user_id($course, $USER->id);

            $startdate = $userdates['start'];

        }

        if (is_object($section)) {

            $sectionnum = $section->section;

        } else {

            $sectionnum = $section;

        }

        // Create a DateTime object for the start date.

        $startdateobj = new DateTime("@$startdate");

        $startdateobj->setTimezone(core_date::get_user_timezone_object());

        // Calculate the interval for one week.

        $oneweekinterval = new DateInterval('P7D');

        // Calculate the interval for the specified number of sections.

        for ($i = 1; $i < $sectionnum; $i++) {

            $startdateobj->add($oneweekinterval);

        }

        // Calculate the end date.

        $enddateobj = clone $startdateobj;

        $enddateobj->add($oneweekinterval);

        $dates = new stdClass();

        $dates->start = $startdateobj->getTimestamp();

        $dates->end = $enddateobj->getTimestamp();

        return $dates;

    }

    /**

     * Returns true if the specified week is current

     *

     * @param int|stdClass|section_info $section

     * @return bool

     */

    public function is_section_current($section) {

        if (is_object($section)) {

            $sectionnum = $section->section;

        } else {

            $sectionnum = $section;

        }

        if ($sectionnum < 1) {

            return false;

        }

        $timenow = time();

        $dates = $this->get_section_dates($section);

        return (($timenow >= $dates->start) && ($timenow < $dates->end));

    }

    /**

     * Whether this format allows to delete sections

     *

     * Do not call this function directly, instead use {@link course_can_delete_section()}

     *

     * @param int|stdClass|section_info $section

     * @return bool

     */

    public function can_delete_section($section) {

        return true;

    }

    /**

     * Returns the default end date for weeks course format.

     *

     * @param moodleform $mform

     * @param array $fieldnames The form - field names mapping.

     * @return int

     */

    public function get_default_course_enddate($mform, $fieldnames = array()) {

        if (empty($fieldnames['startdate'])) {

            $fieldnames['startdate'] = 'startdate';

        }

        if (empty($fieldnames['numsections'])) {

            $fieldnames['numsections'] = 'numsections';

        }

        $startdate = $this->get_form_start_date($mform, $fieldnames);

        if ($mform->elementExists($fieldnames['numsections'])) {

            $numsections = $mform->getElementValue($fieldnames['numsections']);

            $numsections = $mform->getElement($fieldnames['numsections'])->exportValue($numsections);

        } else if ($this->get_courseid()) {

            // For existing courses get the number of sections.

            $numsections = $this->get_last_section_number();

        } else {

            // Fallback to the default value for new courses.

            $numsections = get_config('moodlecourse', $fieldnames['numsections']);

        }

        // Final week's last day.

        $dates = $this->get_section_dates(intval($numsections), $startdate);

        return $dates->end;

    }

    /**

     * Indicates whether the course format supports the creation of a news forum.

     *

     * @return bool

     */

    public function supports_news() {

        return true;

    }

    /**

     * Returns whether this course format allows the activity to

     * have "triple visibility state" - visible always, hidden on course page but available, hidden.

     *

     * @param stdClass|cm_info $cm course module (may be null if we are displaying a form for adding a module)

     * @param stdClass|section_info $section section where this module is located or will be added to

     * @return bool

     */

    public function allow_stealth_module_visibility($cm, $section) {

        // Allow the third visibility state inside visible sections or in section 0.

        return !$section->section || $section->visible;

    }

    public function section_action($section, $action, $sr) {

        global $PAGE;

        // Call the parent method and return the new content for .section_availability element.

        $rv = parent::section_action($section, $action, $sr);

        $renderer = $PAGE->get_renderer('format_weeks');

        if (!($section instanceof section_info)) {

            $modinfo = course_modinfo::instance($this->courseid);

            $section = $modinfo->get_section_info($section->section);

        }

        $elementclass = $this->get_output_classname('content\\section\\availability');

        $availability = new $elementclass($this, $section);

        $rv['section_availability'] = $renderer->render($availability);

        return $rv;

    }

    /**

     * Updates the end date for a course in weeks format if option automaticenddate is set.

     *

     * This method is called from event observers and it can not use any modinfo or format caches because

     * events are triggered before the caches are reset.

     *

     * @param int $courseid

     */

    public static function update_end_date($courseid) {

        global $DB, $COURSE;

        // Use one DB query to retrieve necessary fields in course, value for automaticenddate and number of the last

        // section. This query will also validate that the course is indeed in 'weeks' format.

        $insql = "SELECT c.id, c.format, c.startdate, c.enddate, MAX(s.section) AS lastsection

                    FROM {course} c

                    JOIN {course_sections} s

                      ON s.course = c.id

                   WHERE c.format = :format

                     AND c.id = :courseid

                GROUP BY c.id, c.format, c.startdate, c.enddate";

        $sql = "SELECT co.id, co.format, co.startdate, co.enddate, co.lastsection, fo.value AS automaticenddate

                  FROM ($insql) co

             LEFT JOIN {course_format_options} fo

                    ON fo.courseid = co.id

                   AND fo.format = co.format

                   AND fo.name = :optionname

                   AND fo.sectionid = 0";

        $course = $DB->get_record_sql($sql,

            ['optionname' => 'automaticenddate', 'format' => 'weeks', 'courseid' => $courseid]);

        if (!$course) {

            // Looks like it is a course in a different format, nothing to do here.

            return;

        }

        // Create an instance of this class and mock the course object.

        $format = new format_weeks('weeks', $courseid);

        $format->course = $course;

        // If automaticenddate is not specified take the default value.

        if (!isset($course->automaticenddate)) {

            $defaults = $format->course_format_options();

            $course->automaticenddate = $defaults['automaticenddate']['default'];

        }

        // Check that the course format for setting an automatic date is set.

        if (!empty($course->automaticenddate)) {

            // Get the final week's last day.

            $dates = $format->get_section_dates((int)$course->lastsection);

            // Set the course end date.

            if ($course->enddate != $dates->end) {

                $DB->set_field('course', 'enddate', $dates->end, array('id' => $course->id));

                if (isset($COURSE->id) && $COURSE->id == $courseid) {

                    $COURSE->enddate = $dates->end;

                }

            }

        }

    }

    /**

     * Return the plugin configs for external functions.

     *

     * @return array the list of configuration settings

     * @since Moodle 3.5

     */

    public function get_config_for_external() {

        // Return everything (nothing to hide).

        $formatoptions = $this->get_format_options();

        $formatoptions['indentation'] = get_config('format_weeks', 'indentation');

        return $formatoptions;

    }

    /**

     * Get the required javascript files for the course format.

     *

     * @return array The list of javascript files required by the course format.

     */

    public function get_required_jsfiles(): array {

        return [];

    }

}

/**

 * Implements callback inplace_editable() allowing to edit values in-place

 *

 * @param string $itemtype

 * @param int $itemid

 * @param mixed $newvalue

 * @return \core\output\inplace_editable

 */

function format_weeks_inplace_editable($itemtype, $itemid, $newvalue) {

    global $DB, $CFG;

    require_once($CFG->dirroot . '/course/lib.php');

    if ($itemtype === 'sectionname' || $itemtype === 'sectionnamenl') {

        $section = $DB->get_record_sql(

            'SELECT s.* FROM {course_sections} s JOIN {course} c ON s.course = c.id WHERE s.id = ? AND c.format = ?',

            array($itemid, 'weeks'), MUST_EXIST);

        return course_get_format($section->course)->inplace_editable_update_section_name($section, $itemtype, $newvalue);

    }

}