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Differences Between: [Versions 310 and 402] [Versions 39 and 402]

   1  <?php
   2  
   3  // This file is part of Moodle - http://moodle.org/
   4  //
   5  // Moodle is free software: you can redistribute it and/or modify
   6  // it under the terms of the GNU General Public License as published by
   7  // the Free Software Foundation, either version 3 of the License, or
   8  // (at your option) any later version.
   9  //
  10  // Moodle is distributed in the hope that it will be useful,
  11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  // GNU General Public License for more details.
  14  //
  15  // You should have received a copy of the GNU General Public License
  16  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17  
  18  /**
  19   * Scheduled allocator that internally executes the random allocation later
  20   *
  21   * @package     workshopallocation_scheduled
  22   * @subpackage  mod_workshop
  23   * @copyright   2012 David Mudrak <david@moodle.com>
  24   * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  require_once (__DIR__ . '/../lib.php');            // interface definition
  30  require_once (__DIR__ . '/../../locallib.php');    // workshop internal API
  31  require_once (__DIR__ . '/../random/lib.php');     // random allocator
  32  require_once (__DIR__ . '/settings_form.php');     // our settings form
  33  
  34  /**
  35   * Allocates the submissions randomly in a cronjob task
  36   */
  37  class workshop_scheduled_allocator implements workshop_allocator {
  38  
  39      /** workshop instance */
  40      protected $workshop;
  41  
  42      /** workshop_scheduled_allocator_form with settings for the random allocator */
  43      protected $mform;
  44  
  45      /**
  46       * @param workshop $workshop Workshop API object
  47       */
  48      public function __construct(workshop $workshop) {
  49          $this->workshop = $workshop;
  50      }
  51  
  52      /**
  53       * Save the settings for the random allocator to execute it later
  54       */
  55      public function init() {
  56          global $PAGE, $DB;
  57  
  58          $result = new workshop_allocation_result($this);
  59  
  60          $customdata = array();
  61          $customdata['workshop'] = $this->workshop;
  62  
  63          $current = $DB->get_record('workshopallocation_scheduled',
  64              array('workshopid' => $this->workshop->id), '*', IGNORE_MISSING);
  65  
  66          $customdata['current'] = $current;
  67  
  68          $this->mform = new workshop_scheduled_allocator_form($PAGE->url, $customdata);
  69  
  70          if ($this->mform->is_cancelled()) {
  71              redirect($this->workshop->view_url());
  72          } else if ($settings = $this->mform->get_data()) {
  73              if (empty($settings->enablescheduled)) {
  74                  $enabled = false;
  75              } else {
  76                  $enabled = true;
  77              }
  78              if (empty($settings->reenablescheduled)) {
  79                  $reset = false;
  80              } else {
  81                  $reset = true;
  82              }
  83              $settings = workshop_random_allocator_setting::instance_from_object($settings);
  84              $this->store_settings($enabled, $reset, $settings, $result);
  85              if ($enabled) {
  86                  $msg = get_string('resultenabled', 'workshopallocation_scheduled');
  87              } else {
  88                  $msg = get_string('resultdisabled', 'workshopallocation_scheduled');
  89              }
  90              $result->set_status(workshop_allocation_result::STATUS_CONFIGURED, $msg);
  91              return $result;
  92          } else {
  93              // this branch is executed if the form is submitted but the data
  94              // doesn't validate and the form should be redisplayed
  95              // or on the first display of the form.
  96  
  97              if ($current !== false) {
  98                  $data = workshop_random_allocator_setting::instance_from_text($current->settings);
  99                  $data->enablescheduled = $current->enabled;
 100                  $this->mform->set_data($data);
 101              }
 102  
 103              $result->set_status(workshop_allocation_result::STATUS_VOID);
 104              return $result;
 105          }
 106      }
 107  
 108      /**
 109       * Returns the HTML code to print the user interface
 110       */
 111      public function ui() {
 112          global $PAGE;
 113  
 114          $output = $PAGE->get_renderer('mod_workshop');
 115  
 116          $out = $output->container_start('scheduled-allocator');
 117          // the nasty hack follows to bypass the sad fact that moodle quickforms do not allow to actually
 118          // return the HTML content, just to display it
 119          ob_start();
 120          $this->mform->display();
 121          $out .= ob_get_contents();
 122          ob_end_clean();
 123          $out .= $output->container_end();
 124  
 125          return $out;
 126      }
 127  
 128      /**
 129       * Executes the allocation
 130       *
 131       * @param bool $checksubmissionphase Check that the workshop is in submission phase before doing anything else.
 132       * @return workshop_allocation_result
 133       */
 134      public function execute(bool $checksubmissionphase = true) {
 135          global $DB;
 136  
 137          $result = new workshop_allocation_result($this);
 138  
 139          // Execution can occur in multiple places. Ensure we only allocate one at a time.
 140          $lockfactory = \core\lock\lock_config::get_lock_factory('mod_workshop_allocation_scheduled_execution');
 141          $executionlock = $lockfactory->get_lock($this->workshop->id, 1, 30);
 142          if (!$executionlock) {
 143              $result->set_status(workshop_allocation_result::STATUS_FAILED,
 144                  get_string('resultfailed', 'workshopallocation_scheduled'));
 145          }
 146  
 147          try {
 148              // Make sure the workshop itself is at the expected state.
 149  
 150              if ($checksubmissionphase && $this->workshop->phase != workshop::PHASE_SUBMISSION) {
 151                  $executionlock->release();
 152                  $result->set_status(workshop_allocation_result::STATUS_FAILED,
 153                      get_string('resultfailedphase', 'workshopallocation_scheduled'));
 154                  return $result;
 155              }
 156  
 157              if (empty($this->workshop->submissionend)) {
 158                  $executionlock->release();
 159                  $result->set_status(workshop_allocation_result::STATUS_FAILED,
 160                      get_string('resultfaileddeadline', 'workshopallocation_scheduled'));
 161                  return $result;
 162              }
 163  
 164              if ($this->workshop->submissionend > time()) {
 165                  $executionlock->release();
 166                  $result->set_status(workshop_allocation_result::STATUS_VOID,
 167                      get_string('resultvoiddeadline', 'workshopallocation_scheduled'));
 168                  return $result;
 169              }
 170  
 171              $current = $DB->get_record('workshopallocation_scheduled',
 172                  array('workshopid' => $this->workshop->id, 'enabled' => 1), '*', IGNORE_MISSING);
 173  
 174              if ($current === false) {
 175                  $executionlock->release();
 176                  $result->set_status(workshop_allocation_result::STATUS_FAILED,
 177                      get_string('resultfailedconfig', 'workshopallocation_scheduled'));
 178                  return $result;
 179              }
 180  
 181              if (!$current->enabled) {
 182                  $executionlock->release();
 183                  $result->set_status(workshop_allocation_result::STATUS_VOID,
 184                      get_string('resultdisabled', 'workshopallocation_scheduled'));
 185                  return $result;
 186              }
 187  
 188              if (!is_null($current->timeallocated) and $current->timeallocated >= $this->workshop->submissionend) {
 189                  $executionlock->release();
 190                  $result->set_status(workshop_allocation_result::STATUS_VOID,
 191                      get_string('resultvoidexecuted', 'workshopallocation_scheduled'));
 192                  return $result;
 193              }
 194  
 195              // So now we know that we are after the submissions deadline and either the scheduled allocation was not
 196              // executed yet or it was but the submissions deadline has been prolonged (and hence we should repeat the
 197              // allocations).
 198  
 199              $settings = workshop_random_allocator_setting::instance_from_text($current->settings);
 200              $randomallocator = $this->workshop->allocator_instance('random');
 201              $randomallocator->execute($settings, $result);
 202  
 203              // Store the result in the instance's table.
 204              $update = new stdClass();
 205              $update->id = $current->id;
 206              $update->timeallocated = $result->get_timeend();
 207              $update->resultstatus = $result->get_status();
 208              $update->resultmessage = $result->get_message();
 209              $update->resultlog = json_encode($result->get_logs());
 210  
 211              $DB->update_record('workshopallocation_scheduled', $update);
 212  
 213          } catch (\Exception $e) {
 214              $executionlock->release();
 215              $result->set_status(workshop_allocation_result::STATUS_FAILED,
 216                  get_string('resultfailed', 'workshopallocation_scheduled'));
 217  
 218              throw $e;
 219          }
 220  
 221          $executionlock->release();
 222  
 223          return $result;
 224      }
 225  
 226      /**
 227       * Delete all data related to a given workshop module instance
 228       *
 229       * @see workshop_delete_instance()
 230       * @param int $workshopid id of the workshop module instance being deleted
 231       * @return void
 232       */
 233      public static function delete_instance($workshopid) {
 234          // TODO
 235          return;
 236      }
 237  
 238      /**
 239       * Stores the pre-defined random allocation settings for later usage
 240       *
 241       * @param bool $enabled is the scheduled allocation enabled
 242       * @param bool $reset reset the recent execution info
 243       * @param workshop_random_allocator_setting $settings settings form data
 244       * @param workshop_allocation_result $result logger
 245       */
 246      protected function store_settings($enabled, $reset, workshop_random_allocator_setting $settings, workshop_allocation_result $result) {
 247          global $DB;
 248  
 249  
 250          $data = new stdClass();
 251          $data->workshopid = $this->workshop->id;
 252          $data->enabled = $enabled;
 253          $data->submissionend = $this->workshop->submissionend;
 254          $data->settings = $settings->export_text();
 255  
 256          if ($reset) {
 257              $data->timeallocated = null;
 258              $data->resultstatus = null;
 259              $data->resultmessage = null;
 260              $data->resultlog = null;
 261          }
 262  
 263          $result->log($data->settings, 'debug');
 264  
 265          $current = $DB->get_record('workshopallocation_scheduled', array('workshopid' => $data->workshopid), '*', IGNORE_MISSING);
 266  
 267          if ($current === false) {
 268              $DB->insert_record('workshopallocation_scheduled', $data);
 269  
 270          } else {
 271              $data->id = $current->id;
 272              $DB->update_record('workshopallocation_scheduled', $data);
 273          }
 274      }
 275  }