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Differences Between: [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * This file contains main class for the course format Weeks
  19   *
  20   * @since     Moodle 2.0
  21   * @package   format_weeks
  22   * @copyright 2009 Sam Hemelryk
  23   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  defined('MOODLE_INTERNAL') || die();
  27  require_once($CFG->dirroot. '/course/format/lib.php');
  28  require_once($CFG->dirroot. '/course/lib.php');
  29  
  30  /**
  31   * Main class for the Weeks course format
  32   *
  33   * @package    format_weeks
  34   * @copyright  2012 Marina Glancy
  35   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  36   */
  37  class format_weeks extends format_base {
  38  
  39      /**
  40       * Returns true if this course format uses sections
  41       *
  42       * @return bool
  43       */
  44      public function uses_sections() {
  45          return true;
  46      }
  47  
  48      /**
  49       * Returns the display name of the given section that the course prefers.
  50       *
  51       * @param int|stdClass $section Section object from database or just field section.section
  52       * @return string Display name that the course format prefers, e.g. "Topic 2"
  53       */
  54      public function get_section_name($section) {
  55          $section = $this->get_section($section);
  56          if ((string)$section->name !== '') {
  57              // Return the name the user set.
  58              return format_string($section->name, true, array('context' => context_course::instance($this->courseid)));
  59          } else {
  60              return $this->get_default_section_name($section);
  61          }
  62      }
  63  
  64      /**
  65       * Returns the default section name for the weekly course format.
  66       *
  67       * If the section number is 0, it will use the string with key = section0name from the course format's lang file.
  68       * Otherwise, the default format of "[start date] - [end date]" will be returned.
  69       *
  70       * @param stdClass $section Section object from database or just field course_sections section
  71       * @return string The default value for the section name.
  72       */
  73      public function get_default_section_name($section) {
  74          if ($section->section == 0) {
  75              // Return the general section.
  76              return get_string('section0name', 'format_weeks');
  77          } else {
  78              $dates = $this->get_section_dates($section);
  79  
  80              // We subtract 24 hours for display purposes.
  81              $dates->end = ($dates->end - 86400);
  82  
  83              $dateformat = get_string('strftimedateshort');
  84              $weekday = userdate($dates->start, $dateformat);
  85              $endweekday = userdate($dates->end, $dateformat);
  86              return $weekday.' - '.$endweekday;
  87          }
  88      }
  89  
  90      /**
  91       * The URL to use for the specified course (with section)
  92       *
  93       * @param int|stdClass $section Section object from database or just field course_sections.section
  94       *     if omitted the course view page is returned
  95       * @param array $options options for view URL. At the moment core uses:
  96       *     'navigation' (bool) if true and section has no separate page, the function returns null
  97       *     'sr' (int) used by multipage formats to specify to which section to return
  98       * @return null|moodle_url
  99       */
 100      public function get_view_url($section, $options = array()) {
 101          global $CFG;
 102          $course = $this->get_course();
 103          $url = new moodle_url('/course/view.php', array('id' => $course->id));
 104  
 105          $sr = null;
 106          if (array_key_exists('sr', $options)) {
 107              $sr = $options['sr'];
 108          }
 109          if (is_object($section)) {
 110              $sectionno = $section->section;
 111          } else {
 112              $sectionno = $section;
 113          }
 114          if ($sectionno !== null) {
 115              if ($sr !== null) {
 116                  if ($sr) {
 117                      $usercoursedisplay = COURSE_DISPLAY_MULTIPAGE;
 118                      $sectionno = $sr;
 119                  } else {
 120                      $usercoursedisplay = COURSE_DISPLAY_SINGLEPAGE;
 121                  }
 122              } else {
 123                  $usercoursedisplay = $course->coursedisplay;
 124              }
 125              if ($sectionno != 0 && $usercoursedisplay == COURSE_DISPLAY_MULTIPAGE) {
 126                  $url->param('section', $sectionno);
 127              } else {
 128                  if (empty($CFG->linkcoursesections) && !empty($options['navigation'])) {
 129                      return null;
 130                  }
 131                  $url->set_anchor('section-'.$sectionno);
 132              }
 133          }
 134          return $url;
 135      }
 136  
 137      /**
 138       * Returns the information about the ajax support in the given source format
 139       *
 140       * The returned object's property (boolean)capable indicates that
 141       * the course format supports Moodle course ajax features.
 142       *
 143       * @return stdClass
 144       */
 145      public function supports_ajax() {
 146          $ajaxsupport = new stdClass();
 147          $ajaxsupport->capable = true;
 148          return $ajaxsupport;
 149      }
 150  
 151      /**
 152       * Loads all of the course sections into the navigation
 153       *
 154       * @param global_navigation $navigation
 155       * @param navigation_node $node The course node within the navigation
 156       */
 157      public function extend_course_navigation($navigation, navigation_node $node) {
 158          global $PAGE;
 159          // if section is specified in course/view.php, make sure it is expanded in navigation
 160          if ($navigation->includesectionnum === false) {
 161              $selectedsection = optional_param('section', null, PARAM_INT);
 162              if ($selectedsection !== null && (!defined('AJAX_SCRIPT') || AJAX_SCRIPT == '0') &&
 163                      $PAGE->url->compare(new moodle_url('/course/view.php'), URL_MATCH_BASE)) {
 164                  $navigation->includesectionnum = $selectedsection;
 165              }
 166          }
 167          parent::extend_course_navigation($navigation, $node);
 168  
 169          // We want to remove the general section if it is empty.
 170          $modinfo = get_fast_modinfo($this->get_course());
 171          $sections = $modinfo->get_sections();
 172          if (!isset($sections[0])) {
 173              // The general section is empty to find the navigation node for it we need to get its ID.
 174              $section = $modinfo->get_section_info(0);
 175              $generalsection = $node->get($section->id, navigation_node::TYPE_SECTION);
 176              if ($generalsection) {
 177                  // We found the node - now remove it.
 178                  $generalsection->remove();
 179              }
 180          }
 181      }
 182  
 183      /**
 184       * Custom action after section has been moved in AJAX mode
 185       *
 186       * Used in course/rest.php
 187       *
 188       * @return array This will be passed in ajax respose
 189       */
 190      function ajax_section_move() {
 191          global $PAGE;
 192          $titles = array();
 193          $current = -1;
 194          $course = $this->get_course();
 195          $modinfo = get_fast_modinfo($course);
 196          $renderer = $this->get_renderer($PAGE);
 197          if ($renderer && ($sections = $modinfo->get_section_info_all())) {
 198              foreach ($sections as $number => $section) {
 199                  $titles[$number] = $renderer->section_title($section, $course);
 200                  if ($this->is_section_current($section)) {
 201                      $current = $number;
 202                  }
 203              }
 204          }
 205          return array('sectiontitles' => $titles, 'current' => $current, 'action' => 'move');
 206      }
 207  
 208      /**
 209       * Returns the list of blocks to be automatically added for the newly created course
 210       *
 211       * @return array of default blocks, must contain two keys BLOCK_POS_LEFT and BLOCK_POS_RIGHT
 212       *     each of values is an array of block names (for left and right side columns)
 213       */
 214      public function get_default_blocks() {
 215          return array(
 216              BLOCK_POS_LEFT => array(),
 217              BLOCK_POS_RIGHT => array()
 218          );
 219      }
 220  
 221      /**
 222       * Definitions of the additional options that this course format uses for course
 223       *
 224       * Weeks format uses the following options:
 225       * - coursedisplay
 226       * - hiddensections
 227       * - automaticenddate
 228       *
 229       * @param bool $foreditform
 230       * @return array of options
 231       */
 232      public function course_format_options($foreditform = false) {
 233          static $courseformatoptions = false;
 234          if ($courseformatoptions === false) {
 235              $courseconfig = get_config('moodlecourse');
 236              $courseformatoptions = array(
 237                  'hiddensections' => array(
 238                      'default' => $courseconfig->hiddensections,
 239                      'type' => PARAM_INT,
 240                  ),
 241                  'coursedisplay' => array(
 242                      'default' => $courseconfig->coursedisplay,
 243                      'type' => PARAM_INT,
 244                  ),
 245                  'automaticenddate' => array(
 246                      'default' => 1,
 247                      'type' => PARAM_BOOL,
 248                  ),
 249              );
 250          }
 251          if ($foreditform && !isset($courseformatoptions['coursedisplay']['label'])) {
 252              $courseformatoptionsedit = array(
 253                  'hiddensections' => array(
 254                      'label' => new lang_string('hiddensections'),
 255                      'help' => 'hiddensections',
 256                      'help_component' => 'moodle',
 257                      'element_type' => 'select',
 258                      'element_attributes' => array(
 259                          array(
 260                              0 => new lang_string('hiddensectionscollapsed'),
 261                              1 => new lang_string('hiddensectionsinvisible')
 262                          )
 263                      ),
 264                  ),
 265                  'coursedisplay' => array(
 266                      'label' => new lang_string('coursedisplay'),
 267                      'element_type' => 'select',
 268                      'element_attributes' => array(
 269                          array(
 270                              COURSE_DISPLAY_SINGLEPAGE => new lang_string('coursedisplay_single'),
 271                              COURSE_DISPLAY_MULTIPAGE => new lang_string('coursedisplay_multi')
 272                          )
 273                      ),
 274                      'help' => 'coursedisplay',
 275                      'help_component' => 'moodle',
 276                  ),
 277                  'automaticenddate' => array(
 278                      'label' => new lang_string('automaticenddate', 'format_weeks'),
 279                      'help' => 'automaticenddate',
 280                      'help_component' => 'format_weeks',
 281                      'element_type' => 'advcheckbox',
 282                  )
 283              );
 284              $courseformatoptions = array_merge_recursive($courseformatoptions, $courseformatoptionsedit);
 285          }
 286          return $courseformatoptions;
 287      }
 288  
 289      /**
 290       * Adds format options elements to the course/section edit form.
 291       *
 292       * This function is called from {@link course_edit_form::definition_after_data()}.
 293       *
 294       * @param MoodleQuickForm $mform form the elements are added to.
 295       * @param bool $forsection 'true' if this is a section edit form, 'false' if this is course edit form.
 296       * @return array array of references to the added form elements.
 297       */
 298      public function create_edit_form_elements(&$mform, $forsection = false) {
 299          global $COURSE;
 300          $elements = parent::create_edit_form_elements($mform, $forsection);
 301  
 302          if (!$forsection && (empty($COURSE->id) || $COURSE->id == SITEID)) {
 303              // Add "numsections" element to the create course form - it will force new course to be prepopulated
 304              // with empty sections.
 305              // The "Number of sections" option is no longer available when editing course, instead teachers should
 306              // delete and add sections when needed.
 307              $courseconfig = get_config('moodlecourse');
 308              $max = (int)$courseconfig->maxsections;
 309              $element = $mform->addElement('select', 'numsections', get_string('numberweeks'), range(0, $max ?: 52));
 310              $mform->setType('numsections', PARAM_INT);
 311              if (is_null($mform->getElementValue('numsections'))) {
 312                  $mform->setDefault('numsections', $courseconfig->numsections);
 313              }
 314              array_unshift($elements, $element);
 315          }
 316  
 317          // Re-order things.
 318          $mform->insertElementBefore($mform->removeElement('automaticenddate', false), 'idnumber');
 319          $mform->disabledIf('enddate', 'automaticenddate', 'checked');
 320          foreach ($elements as $key => $element) {
 321              if ($element->getName() == 'automaticenddate') {
 322                  unset($elements[$key]);
 323              }
 324          }
 325  
 326          return $elements;
 327      }
 328  
 329      /**
 330       * Updates format options for a course
 331       *
 332       * In case if course format was changed to 'weeks', we try to copy options
 333       * 'coursedisplay', 'numsections' and 'hiddensections' from the previous format.
 334       * If previous course format did not have 'numsections' option, we populate it with the
 335       * current number of sections
 336       *
 337       * @param stdClass|array $data return value from {@link moodleform::get_data()} or array with data
 338       * @param stdClass $oldcourse if this function is called from {@link update_course()}
 339       *     this object contains information about the course before update
 340       * @return bool whether there were any changes to the options values
 341       */
 342      public function update_course_format_options($data, $oldcourse = null) {
 343          global $DB;
 344          $data = (array)$data;
 345          if ($oldcourse !== null) {
 346              $oldcourse = (array)$oldcourse;
 347              $options = $this->course_format_options();
 348              foreach ($options as $key => $unused) {
 349                  if (!array_key_exists($key, $data)) {
 350                      if (array_key_exists($key, $oldcourse)) {
 351                          $data[$key] = $oldcourse[$key];
 352                      }
 353                  }
 354              }
 355          }
 356          return $this->update_format_options($data);
 357      }
 358  
 359      /**
 360       * Return the start and end date of the passed section
 361       *
 362       * @param int|stdClass|section_info $section section to get the dates for
 363       * @param int $startdate Force course start date, useful when the course is not yet created
 364       * @return stdClass property start for startdate, property end for enddate
 365       */
 366      public function get_section_dates($section, $startdate = false) {
 367          global $USER;
 368  
 369          if ($startdate === false) {
 370              $course = $this->get_course();
 371              $userdates = course_get_course_dates_for_user_id($course, $USER->id);
 372              $startdate = $userdates['start'];
 373          }
 374  
 375          if (is_object($section)) {
 376              $sectionnum = $section->section;
 377          } else {
 378              $sectionnum = $section;
 379          }
 380          $oneweekseconds = 604800;
 381          // Hack alert. We add 2 hours to avoid possible DST problems. (e.g. we go into daylight
 382          // savings and the date changes.
 383          $startdate = $startdate + 7200;
 384  
 385          $dates = new stdClass();
 386          $dates->start = $startdate + ($oneweekseconds * ($sectionnum - 1));
 387          $dates->end = $dates->start + $oneweekseconds;
 388  
 389          return $dates;
 390      }
 391  
 392      /**
 393       * Returns true if the specified week is current
 394       *
 395       * @param int|stdClass|section_info $section
 396       * @return bool
 397       */
 398      public function is_section_current($section) {
 399          if (is_object($section)) {
 400              $sectionnum = $section->section;
 401          } else {
 402              $sectionnum = $section;
 403          }
 404          if ($sectionnum < 1) {
 405              return false;
 406          }
 407          $timenow = time();
 408          $dates = $this->get_section_dates($section);
 409          return (($timenow >= $dates->start) && ($timenow < $dates->end));
 410      }
 411  
 412      /**
 413       * Whether this format allows to delete sections
 414       *
 415       * Do not call this function directly, instead use {@link course_can_delete_section()}
 416       *
 417       * @param int|stdClass|section_info $section
 418       * @return bool
 419       */
 420      public function can_delete_section($section) {
 421          return true;
 422      }
 423  
 424      /**
 425       * Prepares the templateable object to display section name
 426       *
 427       * @param \section_info|\stdClass $section
 428       * @param bool $linkifneeded
 429       * @param bool $editable
 430       * @param null|lang_string|string $edithint
 431       * @param null|lang_string|string $editlabel
 432       * @return \core\output\inplace_editable
 433       */
 434      public function inplace_editable_render_section_name($section, $linkifneeded = true,
 435                                                           $editable = null, $edithint = null, $editlabel = null) {
 436          if (empty($edithint)) {
 437              $edithint = new lang_string('editsectionname', 'format_weeks');
 438          }
 439          if (empty($editlabel)) {
 440              $title = get_section_name($section->course, $section);
 441              $editlabel = new lang_string('newsectionname', 'format_weeks', $title);
 442          }
 443          return parent::inplace_editable_render_section_name($section, $linkifneeded, $editable, $edithint, $editlabel);
 444      }
 445  
 446      /**
 447       * Returns the default end date for weeks course format.
 448       *
 449       * @param moodleform $mform
 450       * @param array $fieldnames The form - field names mapping.
 451       * @return int
 452       */
 453      public function get_default_course_enddate($mform, $fieldnames = array()) {
 454  
 455          if (empty($fieldnames['startdate'])) {
 456              $fieldnames['startdate'] = 'startdate';
 457          }
 458  
 459          if (empty($fieldnames['numsections'])) {
 460              $fieldnames['numsections'] = 'numsections';
 461          }
 462  
 463          $startdate = $this->get_form_start_date($mform, $fieldnames);
 464          if ($mform->elementExists($fieldnames['numsections'])) {
 465              $numsections = $mform->getElementValue($fieldnames['numsections']);
 466              $numsections = $mform->getElement($fieldnames['numsections'])->exportValue($numsections);
 467          } else if ($this->get_courseid()) {
 468              // For existing courses get the number of sections.
 469              $numsections = $this->get_last_section_number();
 470          } else {
 471              // Fallback to the default value for new courses.
 472              $numsections = get_config('moodlecourse', $fieldnames['numsections']);
 473          }
 474  
 475          // Final week's last day.
 476          $dates = $this->get_section_dates(intval($numsections), $startdate);
 477          return $dates->end;
 478      }
 479  
 480      /**
 481       * Indicates whether the course format supports the creation of a news forum.
 482       *
 483       * @return bool
 484       */
 485      public function supports_news() {
 486          return true;
 487      }
 488  
 489      /**
 490       * Returns whether this course format allows the activity to
 491       * have "triple visibility state" - visible always, hidden on course page but available, hidden.
 492       *
 493       * @param stdClass|cm_info $cm course module (may be null if we are displaying a form for adding a module)
 494       * @param stdClass|section_info $section section where this module is located or will be added to
 495       * @return bool
 496       */
 497      public function allow_stealth_module_visibility($cm, $section) {
 498          // Allow the third visibility state inside visible sections or in section 0.
 499          return !$section->section || $section->visible;
 500      }
 501  
 502      public function section_action($section, $action, $sr) {
 503          global $PAGE;
 504  
 505          // Call the parent method and return the new content for .section_availability element.
 506          $rv = parent::section_action($section, $action, $sr);
 507          $renderer = $PAGE->get_renderer('format_weeks');
 508          $rv['section_availability'] = $renderer->section_availability($this->get_section($section));
 509          return $rv;
 510      }
 511  
 512      /**
 513       * Updates the end date for a course in weeks format if option automaticenddate is set.
 514       *
 515       * This method is called from event observers and it can not use any modinfo or format caches because
 516       * events are triggered before the caches are reset.
 517       *
 518       * @param int $courseid
 519       */
 520      public static function update_end_date($courseid) {
 521          global $DB, $COURSE;
 522  
 523          // Use one DB query to retrieve necessary fields in course, value for automaticenddate and number of the last
 524          // section. This query will also validate that the course is indeed in 'weeks' format.
 525          $insql = "SELECT c.id, c.format, c.startdate, c.enddate, MAX(s.section) AS lastsection
 526                      FROM {course} c
 527                      JOIN {course_sections} s
 528                        ON s.course = c.id
 529                     WHERE c.format = :format
 530                       AND c.id = :courseid
 531                  GROUP BY c.id, c.format, c.startdate, c.enddate";
 532          $sql = "SELECT co.id, co.format, co.startdate, co.enddate, co.lastsection, fo.value AS automaticenddate
 533                    FROM ($insql) co
 534               LEFT JOIN {course_format_options} fo
 535                      ON fo.courseid = co.id
 536                     AND fo.format = co.format
 537                     AND fo.name = :optionname
 538                     AND fo.sectionid = 0";
 539          $course = $DB->get_record_sql($sql,
 540              ['optionname' => 'automaticenddate', 'format' => 'weeks', 'courseid' => $courseid]);
 541  
 542          if (!$course) {
 543              // Looks like it is a course in a different format, nothing to do here.
 544              return;
 545          }
 546  
 547          // Create an instance of this class and mock the course object.
 548          $format = new format_weeks('weeks', $courseid);
 549          $format->course = $course;
 550  
 551          // If automaticenddate is not specified take the default value.
 552          if (!isset($course->automaticenddate)) {
 553              $defaults = $format->course_format_options();
 554              $course->automaticenddate = $defaults['automaticenddate']['default'];
 555          }
 556  
 557          // Check that the course format for setting an automatic date is set.
 558          if (!empty($course->automaticenddate)) {
 559              // Get the final week's last day.
 560              $dates = $format->get_section_dates((int)$course->lastsection);
 561  
 562              // Set the course end date.
 563              if ($course->enddate != $dates->end) {
 564                  $DB->set_field('course', 'enddate', $dates->end, array('id' => $course->id));
 565                  if (isset($COURSE->id) && $COURSE->id == $courseid) {
 566                      $COURSE->enddate = $dates->end;
 567                  }
 568              }
 569          }
 570      }
 571  
 572      /**
 573       * Return the plugin configs for external functions.
 574       *
 575       * @return array the list of configuration settings
 576       * @since Moodle 3.5
 577       */
 578      public function get_config_for_external() {
 579          // Return everything (nothing to hide).
 580          return $this->get_format_options();
 581      }
 582  }
 583  
 584  /**
 585   * Implements callback inplace_editable() allowing to edit values in-place
 586   *
 587   * @param string $itemtype
 588   * @param int $itemid
 589   * @param mixed $newvalue
 590   * @return \core\output\inplace_editable
 591   */
 592  function format_weeks_inplace_editable($itemtype, $itemid, $newvalue) {
 593      global $DB, $CFG;
 594      require_once($CFG->dirroot . '/course/lib.php');
 595      if ($itemtype === 'sectionname' || $itemtype === 'sectionnamenl') {
 596          $section = $DB->get_record_sql(
 597              'SELECT s.* FROM {course_sections} s JOIN {course} c ON s.course = c.id WHERE s.id = ? AND c.format = ?',
 598              array($itemid, 'weeks'), MUST_EXIST);
 599          return course_get_format($section->course)->inplace_editable_update_section_name($section, $itemtype, $newvalue);
 600      }
 601  }