/**
  * Creates the backup_schema_form instance for this stage
  *
  * @return backup_schema_form
  */
 protected function initialise_stage_form()
 {
     global $PAGE;
     if ($this->stageform === null) {
         $form = new restore_schema_form($this, $PAGE->url);
         $tasks = $this->ui->get_tasks();
         $content = '';
         $courseheading = false;
         foreach ($tasks as $task) {
             if (!$task instanceof restore_root_task) {
                 if (!$courseheading) {
                     // If we havn't already display a course heading to group nicely
                     $form->add_heading('coursesettings', get_string('coursesettings', 'backup'));
                     $courseheading = true;
                 }
                 // First add each setting
                 foreach ($task->get_settings() as $setting) {
                     $form->add_setting($setting, $task);
                 }
                 // The add all the dependencies
                 foreach ($task->get_settings() as $setting) {
                     $form->add_dependencies($setting);
                 }
             } else {
                 if ($this->ui->enforce_changed_dependencies()) {
                     // Only show these settings if dependencies changed them.
                     // Add a root settings heading to group nicely
                     $form->add_heading('rootsettings', get_string('rootsettings', 'backup'));
                     // Iterate all settings and add them to the form as a fixed
                     // setting. We only want schema settings to be editable
                     foreach ($task->get_settings() as $setting) {
                         if ($setting->get_name() != 'filename') {
                             $form->add_fixed_setting($setting, $task);
                         }
                     }
                 }
             }
         }
         $this->stageform = $form;
     }
     return $this->stageform;
 }
 /**
  * Creates the backup_schema_form instance for this stage
  *
  * @return backup_schema_form
  */
 protected function initialise_stage_form()
 {
     global $PAGE;
     if ($this->stageform === null) {
         $form = new restore_schema_form($this, $PAGE->url);
         $tasks = $this->ui->get_tasks();
         $courseheading = false;
         // Track progress through each stage.
         $progress = $this->ui->get_progress_reporter();
         $progress->start_progress('Initialise schema stage form', 3);
         $progress->start_progress('', count($tasks));
         $done = 1;
         $allsettings = array();
         foreach ($tasks as $task) {
             if (!$task instanceof restore_root_task) {
                 if (!$courseheading) {
                     // If we haven't already display a course heading to group nicely.
                     $form->add_heading('coursesettings', get_string('coursesettings', 'backup'));
                     $courseheading = true;
                 }
                 // Put each setting into an array of settings to add. Adding
                 // a setting individually is a very slow operation, so we add.
                 // them all in a batch later on.
                 foreach ($task->get_settings() as $setting) {
                     $allsettings[] = array($setting, $task);
                 }
             } else {
                 if ($this->ui->enforce_changed_dependencies()) {
                     // Only show these settings if dependencies changed them.
                     // Add a root settings heading to group nicely.
                     $form->add_heading('rootsettings', get_string('rootsettings', 'backup'));
                     // Iterate all settings and add them to the form as a fixed
                     // setting. We only want schema settings to be editable.
                     foreach ($task->get_settings() as $setting) {
                         if ($setting->get_name() != 'filename') {
                             $form->add_fixed_setting($setting, $task);
                         }
                     }
                 }
             }
             // Update progress.
             $progress->progress($done++);
         }
         $progress->end_progress();
         // Add settings for tasks in batches of up to 1000. Adding settings
         // in larger batches improves performance, but if it takes too long,
         // we won't be able to update the progress bar so the backup might.
         // time out. 1000 is chosen to balance this.
         $numsettings = count($allsettings);
         $progress->start_progress('', ceil($numsettings / self::MAX_SETTINGS_BATCH));
         $start = 0;
         $done = 1;
         while ($start < $numsettings) {
             $length = min(self::MAX_SETTINGS_BATCH, $numsettings - $start);
             $form->add_settings(array_slice($allsettings, $start, $length));
             $start += $length;
             $progress->progress($done++);
         }
         $progress->end_progress();
         // Add the dependencies for all the settings.
         $progress->start_progress('', count($allsettings));
         $done = 1;
         foreach ($allsettings as $settingtask) {
             $form->add_dependencies($settingtask[0]);
             $progress->progress($done++);
         }
         $progress->end_progress();
         $progress->end_progress();
         $this->stageform = $form;
     }
     return $this->stageform;
 }
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 /**
  * Creates the backup_schema_form instance for this stage
  *
  * @return backup_schema_form
  */
 protected function initialise_stage_form()
 {
     global $PAGE;
     if ($this->stageform === null) {
         $form = new restore_schema_form($this, $PAGE->url);
         $tasks = $this->ui->get_tasks();
         $courseheading = false;
         $allsettings = array();
         foreach ($tasks as $task) {
             if (!$task instanceof restore_root_task) {
                 if (!$courseheading) {
                     // If we havn't already display a course heading to group nicely
                     $form->add_heading('coursesettings', get_string('coursesettings', 'backup'));
                     $courseheading = true;
                 }
                 // Put each setting into an array of settings to add. Adding
                 // a setting individually is a very slow operation, so we add
                 // them all in a batch later on.
                 foreach ($task->get_settings() as $setting) {
                     $allsettings[] = array($setting, $task);
                 }
             } else {
                 if ($this->ui->enforce_changed_dependencies()) {
                     // Only show these settings if dependencies changed them.
                     // Add a root settings heading to group nicely
                     $form->add_heading('rootsettings', get_string('rootsettings', 'backup'));
                     // Iterate all settings and add them to the form as a fixed
                     // setting. We only want schema settings to be editable
                     foreach ($task->get_settings() as $setting) {
                         if ($setting->get_name() != 'filename') {
                             $form->add_fixed_setting($setting, $task);
                         }
                     }
                 }
             }
         }
         // Actually add all the settings that we put in the array.
         $form->add_settings($allsettings);
         // Add the dependencies for all the settings.
         foreach ($allsettings as $settingtask) {
             $form->add_dependencies($settingtask[0]);
         }
         $this->stageform = $form;
     }
     return $this->stageform;
 }