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   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   * Defines restore_course_task class
  20   *
  21   * @package     core_backup
  22   * @subpackage  moodle2
  23   * @category    backup
  24   * @copyright   2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
  25   * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  26   */
  27  
  28  defined('MOODLE_INTERNAL') || die();
  29  
  30  /**
  31   * course task that provides all the properties and common steps to be performed
  32   * when one course is being restored
  33   *
  34   * TODO: Finish phpdocs
  35   */
  36  class restore_course_task extends restore_task {
  37  
  38      protected $info; // info related to course gathered from backup file
  39      protected $contextid; // course context id
  40  
  41      /**
  42       * Constructor - instantiates one object of this class
  43       */
  44      public function __construct($name, $info, $plan = null) {
  45          $this->info = $info;
  46          parent::__construct($name, $plan);
  47      }
  48  
  49      /**
  50       * Course tasks have their own directory to read files
  51       */
  52      public function get_taskbasepath() {
  53  
  54          return $this->get_basepath() . '/course';
  55      }
  56  
  57      public function get_contextid() {
  58          return $this->contextid;
  59      }
  60  
  61      /**
  62       * Create all the steps that will be part of this task
  63       */
  64      public function build() {
  65  
  66          // Define the task contextid (the course one)
  67          $this->contextid = context_course::instance($this->get_courseid())->id;
  68  
  69          // Executed conditionally if restoring to new course or if overwrite_conf setting is enabled
  70          if ($this->get_target() == backup::TARGET_NEW_COURSE || $this->get_setting_value('overwrite_conf') == true) {
  71              $this->add_step(new restore_course_structure_step('course_info', 'course.xml'));
  72          }
  73  
  74          $this->add_step(new restore_course_legacy_files_step('legacy_files'));
  75  
  76          // Deal with enrolment methods and user enrolments.
  77          if ($this->plan->get_mode() == backup::MODE_IMPORT) {
  78              // No need to do anything with enrolments.
  79  
  80          } else if (!$this->get_setting_value('users') or $this->plan->get_mode() == backup::MODE_HUB) {
  81              if ($this->get_target() == backup::TARGET_CURRENT_ADDING or $this->get_target() == backup::TARGET_EXISTING_ADDING) {
  82                  // Keep current enrolments unchanged.
  83              } else {
  84                  // If no instances yet add default enrol methods the same way as when creating new course in UI.
  85                  $this->add_step(new restore_default_enrolments_step('default_enrolments'));
  86              }
  87  
  88          } else {
  89              // Restore course enrolment data.
  90              $this->add_step(new restore_enrolments_structure_step('course_enrolments', 'enrolments.xml'));
  91          }
  92  
  93          // Populate groups, this must be done after enrolments because only enrolled users may be in groups.
  94          $this->add_step(new restore_groups_members_structure_step('create_groups_members', '../groups.xml'));
  95  
  96          // Restore course role assignments and overrides (internally will observe the role_assignments setting),
  97          // this must be done after all users are enrolled.
  98          $this->add_step(new restore_ras_and_caps_structure_step('course_ras_and_caps', 'roles.xml'));
  99  
 100          // Restore course filters (conditionally)
 101          if ($this->get_setting_value('filters')) {
 102              $this->add_step(new restore_filters_structure_step('course_filters', 'filters.xml'));
 103          }
 104  
 105          // Restore course comments (conditionally)
 106          if ($this->get_setting_value('comments')) {
 107              $this->add_step(new restore_comments_structure_step('course_comments', 'comments.xml'));
 108          }
 109  
 110          // Calendar events (conditionally)
 111          if ($this->get_setting_value('calendarevents')) {
 112              $this->add_step(new restore_calendarevents_structure_step('course_calendar', 'calendar.xml'));
 113          }
 114  
 115          // At the end, mark it as built
 116          $this->built = true;
 117      }
 118  
 119      /**
 120       * Define the contents in the course that must be
 121       * processed by the link decoder
 122       */
 123      static public function define_decode_contents() {
 124          $contents = array();
 125  
 126          $contents[] = new restore_decode_content('course', 'summary');
 127          $contents[] = new restore_decode_content('event', 'description');
 128  
 129          return $contents;
 130      }
 131  
 132      /**
 133       * Define the decoding rules for links belonging
 134       * to the course to be executed by the link decoder
 135       */
 136      static public function define_decode_rules() {
 137          $rules = array();
 138  
 139          // Link to the course main page (it also covers "&topic=xx" and "&week=xx"
 140          // because they don't become transformed (section number) in backup/restore.
 141          $rules[] = new restore_decode_rule('COURSEVIEWBYID',       '/course/view.php?id=$1',        'course');
 142  
 143          // A few other key course links.
 144          $rules[] = new restore_decode_rule('GRADEINDEXBYID',       '/grade/index.php?id=$1',        'course');
 145          $rules[] = new restore_decode_rule('GRADEREPORTINDEXBYID', '/grade/report/index.php?id=$1', 'course');
 146          $rules[] = new restore_decode_rule('BADGESVIEWBYID',       '/badges/view.php?type=2&id=$1', 'course');
 147          $rules[] = new restore_decode_rule('USERINDEXVIEWBYID',    '/user/index.php?id=$1',         'course');
 148  
 149          return $rules;
 150      }
 151  
 152  // Protected API starts here
 153  
 154      /**
 155       * Define the common setting that any restore course will have
 156       */
 157      protected function define_settings() {
 158  
 159          //$name, $vtype, $value = null, $visibility = self::VISIBLE, $status = self::NOT_LOCKED
 160          $fullname = new restore_course_generic_text_setting('course_fullname', base_setting::IS_TEXT, $this->get_info()->original_course_fullname);
 161          $fullname->get_ui()->set_label(get_string('setting_course_fullname', 'backup'));
 162          $this->add_setting($fullname);
 163  
 164          $shortname = new restore_course_generic_text_setting('course_shortname', base_setting::IS_TEXT, $this->get_info()->original_course_shortname);
 165          $shortname->get_ui()->set_label(get_string('setting_course_shortname', 'backup'));
 166          $this->add_setting($shortname);
 167  
 168          $startdate = new restore_course_generic_text_setting('course_startdate', base_setting::IS_INTEGER, $this->get_info()->original_course_startdate);
 169          $startdate->set_ui(new backup_setting_ui_dateselector($startdate, get_string('setting_course_startdate', 'backup')));
 170          $this->add_setting($startdate);
 171  
 172          $keep_enrols = new restore_course_generic_setting('keep_roles_and_enrolments', base_setting::IS_BOOLEAN, false);
 173          $keep_enrols->set_ui(new backup_setting_ui_select($keep_enrols, $keep_enrols->get_name(), array(1=>get_string('yes'), 0=>get_string('no'))));
 174          $keep_enrols->get_ui()->set_label(get_string('setting_keep_roles_and_enrolments', 'backup'));
 175          if ($this->get_target() != backup::TARGET_CURRENT_DELETING and $this->get_target() != backup::TARGET_EXISTING_DELETING) {
 176              $keep_enrols->set_value(false);
 177              $keep_enrols->set_status(backup_setting::LOCKED_BY_CONFIG);
 178              $keep_enrols->set_visibility(backup_setting::HIDDEN);
 179          }
 180          $this->add_setting($keep_enrols);
 181  
 182          $keep_groups = new restore_course_generic_setting('keep_groups_and_groupings', base_setting::IS_BOOLEAN, false);
 183          $keep_groups->set_ui(new backup_setting_ui_select($keep_groups, $keep_groups->get_name(), array(1=>get_string('yes'), 0=>get_string('no'))));
 184          $keep_groups->get_ui()->set_label(get_string('setting_keep_groups_and_groupings', 'backup'));
 185          if ($this->get_target() != backup::TARGET_CURRENT_DELETING and $this->get_target() != backup::TARGET_EXISTING_DELETING) {
 186              $keep_groups->set_value(false);
 187              $keep_groups->set_status(backup_setting::LOCKED_BY_CONFIG);
 188              $keep_groups->set_visibility(backup_setting::HIDDEN);
 189          }
 190          $this->add_setting($keep_groups);
 191  
 192          // Define overwrite_conf to decide if course configuration will be restored over existing one
 193          $overwrite = new restore_course_overwrite_conf_setting('overwrite_conf', base_setting::IS_BOOLEAN, false);
 194          $overwrite->set_ui(new backup_setting_ui_select($overwrite, $overwrite->get_name(), array(1=>get_string('yes'), 0=>get_string('no'))));
 195          $overwrite->get_ui()->set_label(get_string('setting_overwriteconf', 'backup'));
 196          if ($this->get_target() == backup::TARGET_NEW_COURSE) {
 197              $overwrite->set_value(true);
 198              $overwrite->set_status(backup_setting::LOCKED_BY_CONFIG);
 199              $overwrite->set_visibility(backup_setting::HIDDEN);
 200          }
 201          $this->add_setting($overwrite);
 202  
 203      }
 204  }