Issue #2320157 by moshe weitzman, Wim Leers, penyaskito, tim.plunkett:...

Issue #2320157 by moshe weitzman, Wim Leers, penyaskito, tim.plunkett: Generate placeholder content for Field types.

core/lib/Drupal/Component/Utility/Random.php

@@ -135,6 +135,32 @@ public function name($length = 8, $unique = FALSE) {
     return $str;
   }
 
+  /**
+   * Generate a string that looks like a word (letters only, alternating consonants and vowels).
+   *
+   * @param int $length
+   *  The desired word length.
+   *
+   * @return string
+   */
+  public function word($length) {
+    mt_srand((double) microtime()*1000000);
+
+    $vowels = array("a", "e", "i", "o", "u");
+    $cons = array("b", "c", "d", "g", "h", "j", "k", "l", "m", "n", "p", "r", "s", "t", "u", "v", "w", "tr",
+      "cr", "br", "fr", "th", "dr", "ch", "ph", "wr", "st", "sp", "sw", "pr", "sl", "cl", "sh");
+
+    $num_vowels = count($vowels);
+    $num_cons = count($cons);
+    $word = '';
+
+    while(strlen($word) < $length){
+      $word .= $cons[mt_rand(0, $num_cons - 1)] . $vowels[mt_rand(0, $num_vowels - 1)];
+    }
+
+    return substr($word, 0, $length);
+  }
+
   /**
    * Generates a random PHP object.
    *
@@ -155,4 +181,124 @@ public function object($size = 4) {
     return $object;
   }
 
+  /**
+   * Generates sentences Latin words, often used as placeholder text.
+   *
+   * @param int $min_word_count
+   *   The minimum number of words in the return string. Total word count
+   *   can slightly exceed provided this value in order to deliver
+   *   sentences of random length.
+   * @param bool $capitalize
+   *   Uppercase all the words in the string.
+   *
+   * @return string
+   *   Nonsense latin words which form sentence(s).
+   */
+  public function sentences($min_word_count, $capitalize = FALSE) {
+    $dictionary = array("abbas", "abdo", "abico", "abigo", "abluo", "accumsan",
+      "acsi", "ad", "adipiscing", "aliquam", "aliquip", "amet", "antehabeo",
+      "appellatio", "aptent", "at", "augue", "autem", "bene", "blandit",
+      "brevitas", "caecus", "camur", "capto", "causa", "cogo", "comis",
+      "commodo", "commoveo", "consectetuer", "consequat", "conventio", "cui",
+      "damnum", "decet", "defui", "diam", "dignissim", "distineo", "dolor",
+      "dolore", "dolus", "duis", "ea", "eligo", "elit", "enim", "erat",
+      "eros", "esca", "esse", "et", "eu", "euismod", "eum", "ex", "exerci",
+      "exputo", "facilisi", "facilisis", "fere", "feugiat", "gemino",
+      "genitus", "gilvus", "gravis", "haero", "hendrerit", "hos", "huic",
+      "humo", "iaceo", "ibidem", "ideo", "ille", "illum", "immitto",
+      "importunus", "imputo", "in", "incassum", "inhibeo", "interdico",
+      "iriure", "iusto", "iustum", "jugis", "jumentum", "jus", "laoreet",
+      "lenis", "letalis", "lobortis", "loquor", "lucidus", "luctus", "ludus",
+      "luptatum", "macto", "magna", "mauris", "melior", "metuo", "meus",
+      "minim", "modo", "molior", "mos", "natu", "neo", "neque", "nibh",
+      "nimis", "nisl", "nobis", "nostrud", "nulla", "nunc", "nutus", "obruo",
+      "occuro", "odio", "olim", "oppeto", "os", "pagus", "pala", "paratus",
+      "patria", "paulatim", "pecus", "persto", "pertineo", "plaga", "pneum",
+      "populus", "praemitto", "praesent", "premo", "probo", "proprius",
+      "quadrum", "quae", "qui", "quia", "quibus", "quidem", "quidne", "quis",
+      "ratis", "refero", "refoveo", "roto", "rusticus", "saepius",
+      "sagaciter", "saluto", "scisco", "secundum", "sed", "si", "similis",
+      "singularis", "sino", "sit", "sudo", "suscipere", "suscipit", "tamen",
+      "tation", "te", "tego", "tincidunt", "torqueo", "tum", "turpis",
+      "typicus", "ulciscor", "ullamcorper", "usitas", "ut", "utinam",
+      "utrum", "uxor", "valde", "valetudo", "validus", "vel", "velit",
+      "veniam", "venio", "vereor", "vero", "verto", "vicis", "vindico",
+      "virtus", "voco", "volutpat", "vulpes", "vulputate", "wisi", "ymo",
+      "zelus");
+    $dictionary_flipped = array_flip($dictionary);
+    $greeking = '';
+
+    if (!$capitalize) {
+      $words_remaining = $min_word_count;
+      while ($words_remaining > 0) {
+        $sentence_length = mt_rand(3, 10);
+        $words = array_rand($dictionary_flipped, $sentence_length);
+        $sentence = implode(' ', $words);
+        $greeking .= ucfirst($sentence) . '. ';
+        $words_remaining -= $sentence_length;
+      }
+    }
+    else {
+      // Use slightly different method for titles.
+      $words = array_rand($dictionary_flipped, $min_word_count);
+      $words = is_array($words) ? implode(' ', $words) : $words;
+      $greeking = ucwords($words);
+    }
+    return trim($greeking);
+  }
+
+  /**
+   * Generate paragraphs separated by double new line.
+   *
+   * @param int $paragraph_count
+   * @return string
+   */
+  public function paragraphs($paragraph_count = 12) {
+    $output = '';
+    for ($i = 1; $i <= $paragraph_count; $i++) {
+      $output .= $this->sentences(mt_rand(20, 60)) ."\n\n";
+    }
+    return $output;
+  }
+
+
+  /**
+   * Create a placeholder image.
+   *
+   * @param string $destination
+   *   The absolute file path where the image should be stored.
+   * @param int $min_resolution
+   * @param int $max_resolution
+   *
+   * @return string
+   *   Path to image file.
+   */
+  public function image($destination, $min_resolution, $max_resolution) {
+    $extension = pathinfo($destination, PATHINFO_EXTENSION);
+    $min = explode('x', $min_resolution);
+    $max = explode('x', $max_resolution);
+
+    $width = rand((int) $min[0], (int) $max[0]);
+    $height = rand((int) $min[1], (int) $max[1]);
+
+    // Make an image split into 4 sections with random colors.
+    $im = imagecreate($width, $height);
+    for ($n = 0; $n < 4; $n++) {
+      $color = imagecolorallocate($im, rand(0, 255), rand(0, 255), rand(0, 255));
+      $x = $width / 2 * ($n % 2);
+      $y = $height / 2 * (int) ($n >= 2);
+      imagefilledrectangle($im, $x, $y, $x + $width / 2, $y + $height / 2, $color);
+    }
+
+    // Make a perfect circle in the image middle.
+    $color = imagecolorallocate($im, rand(0, 255), rand(0, 255), rand(0, 255));
+    $smaller_dimension = min($width, $height);
+    $smaller_dimension = ($smaller_dimension % 2) ? $smaller_dimension : $smaller_dimension;
+    imageellipse($im, $width / 2, $height / 2, $smaller_dimension, $smaller_dimension, $color);
+
+    $save_function = 'image'. ($extension == 'jpg' ? 'jpeg' : $extension);
+    $save_function($im, $destination);
+    return $destination;
+  }
+
 }

core/lib/Drupal/Core/Field/FieldItemBase.php

@@ -237,6 +237,11 @@ public function update() { }
    */
   public function delete() { }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) { }
+
   /**
    * {@inheritdoc}
    */

core/lib/Drupal/Core/Field/FieldItemInterface.php

@@ -216,6 +216,20 @@ public function delete();
    */
   public function deleteRevision();
 
+  /**
+   * Generates placeholder field values.
+   *
+   * Useful when populating site with placeholder content during site building
+   * or profiling.
+   *
+   * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
+   *   The field definition.
+   *
+   * @return array
+   *   An associative array of values.
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition);
+
   /**
    * Defines the field-level settings for this plugin.
    *

core/lib/Drupal/Core/Field/FieldItemList.php

@@ -278,6 +278,18 @@ public function view($display_options = array()) {
     return $view_builder->viewField($this, $display_options);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+   public function generateSampleItems($count = 1) {
+    $field_definition = $this->getFieldDefinition();
+    $field_type_class = \Drupal::service('plugin.manager.field.field_type')->getPluginClass($field_definition->getType());
+    for ($delta = 0; $delta < $count; $delta++) {
+      $values[$delta] = $field_type_class::generateSampleValue($field_definition);
+    }
+    $this->setValue($values);
+  }
+
   /**
    * {@inheritdoc}
    */

core/lib/Drupal/Core/Field/FieldItemListInterface.php

@@ -181,6 +181,14 @@ public function deleteRevision();
    */
   public function view($display_options = array());
 
+  /*
+   * Populates a specified number of field items with valid sample data.
+   *
+   * @param int $count
+   *   The number of items to create.
+   */
+  public function generateSampleItems($count = 1);
+
   /**
    * Returns a form for the default value input.
    *

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/BooleanItem.php

@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Form\FormStateInterface;
@@ -113,5 +114,12 @@ public function getSettableOptions(AccountInterface $account = NULL) {
     return $this->getPossibleOptions($account);
   }
 
-
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $values['value'] = mt_rand(0, 1);
+    return $values;
+  }
 }
+

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php

@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\TypedData\DataDefinition;
@@ -97,4 +98,51 @@ public function preSave() {
     $this->value = round($this->value, $this->getSetting('scale'));
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $settings = $field_definition->getSettings();
+    $precision = $settings['precision'] ?: 10;
+    $scale = $settings['scale'] ?: 2;
+    // $precision - $scale is the number of digits on the left of the decimal
+    // point.
+    // The maximum number you can get with 3 digits is 10^3 - 1 --> 999.
+    // The minimum number you can get with 3 digits is -1 * (10^3 - 1).
+    $max = is_numeric($settings['max']) ?: pow(10, ($precision - $scale)) - 1;
+    $min = is_numeric($settings['min']) ?: -pow(10, ($precision - $scale)) + 1;
+
+    // Get the number of decimal digits for the $max
+    $decimal_digits = self::getDecimalDigits($max);
+    // Do the same for the min and keep the higher number of decimal digits.
+    $decimal_digits = max(self::getDecimalDigits($min), $decimal_digits);
+    // If $min = 1.234 and $max = 1.33 then $decimal_digits = 3
+    $scale = rand($decimal_digits, $scale);
+
+    // @see "Example #1 Calculate a random floating-point number" in
+    // http://php.net/manual/en/function.mt-getrandmax.php
+    $random_decimal = $min + mt_rand() / mt_getrandmax() * ($max - $min);
+    $values['value'] = self::truncateDecimal($random_decimal, $scale);
+    return $values;
+  }
+
+
+  /**
+   * Helper method to get the number of decimal digits out of a decimal number.
+   *
+   * @param int $decimal
+   *   The number to calculate the number of decimals digits from.
+   *
+   * @return int
+   *   The number of decimal digits.
+   */
+  protected static function getDecimalDigits($decimal) {
+    $digits = 0;
+    while ($decimal - round($decimal)) {
+      $decimal *= 10;
+      $digits++;
+    }
+    return $digits;
+  }
+
 }

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EmailItem.php

@@ -7,6 +7,8 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Component\Utility\Random;
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 use Drupal\Core\Render\Element\Email;
@@ -69,6 +71,15 @@ public function getConstraints() {
     return $constraints;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $random = new Random();
+    $values['value'] = $random->name() . '@example.com';
+    return $values;
+  }
+
   /**
    * {@inheritdoc}
    */

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php

@@ -9,6 +9,7 @@
 
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Entity\TypedData\EntityDataDefinition;
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 use Drupal\Core\TypedData\DataDefinition;
@@ -209,6 +210,18 @@ public function preSave() {
     }
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $manager = \Drupal::service('plugin.manager.entity_reference.selection');
+    if ($referenceable = $manager->getSelectionHandler($field_definition)->getReferenceableEntities()) {
+      $group = array_rand($referenceable);
+      $values['target_id'] = array_rand($referenceable[$group]);
+      return $values;
+    }
+  }
+
   /**
    * Determines whether the item holds an unsaved entity.
    *

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php

@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\TypedData\DataDefinition;
 
@@ -47,4 +48,20 @@ public static function schema(FieldStorageDefinitionInterface $field_definition)
     );
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $settings = $field_definition->getSettings();
+    $precision = rand(10, 32);
+    $scale = rand(0, 2);
+    $max = is_numeric($settings['max']) ?: pow(10, ($precision - $scale)) - 1;
+    $min = is_numeric($settings['min']) ?: -pow(10, ($precision - $scale)) + 1;
+    // @see "Example #1 Calculate a random floating-point number" in
+    // http://php.net/manual/en/function.mt-getrandmax.php
+    $random_decimal = $min + mt_rand() / mt_getrandmax() * ($max - $min);
+    $values['value'] = self::truncateDecimal($random_decimal, $scale);
+    return $values;
+  }
+
 }

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/IntegerItem.php

@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\TypedData\DataDefinition;
 
@@ -102,4 +103,14 @@ public static function schema(FieldStorageDefinitionInterface $field_definition)
     );
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $min = $field_definition->getSetting('min') ?: 0;
+    $max = $field_definition->getSetting('max') ?: 999;
+    $values['value'] = mt_rand($min, $max);
+    return $values;
+  }
+
 }

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/NumericItemBase.php

@@ -113,4 +113,19 @@ public function getConstraints() {
     return $constraints;
   }
 
+  /**
+   * Helper method to truncate a decimal number to a given number of decimals.
+   *
+   * @param float $decimal
+   *   Decimal number to truncate.
+   * @param int $num
+   *   Number of digits the output will have.
+   *
+   * @return float
+   *   Decimal number truncated.
+   */
+  protected static function truncateDecimal($decimal, $num) {
+    return floor($decimal * pow(10, $num)) / pow(10, $num);
+  }
+
 }

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php

@@ -7,6 +7,8 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Component\Utility\Random;
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 use Drupal\Core\StringTranslation\TranslationWrapper;
@@ -83,4 +85,14 @@ public function getConstraints() {
     return $constraints;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $random = new Random();
+    $max = $field_definition->getSetting('max_length');
+    $values['value'] = $random->word(mt_rand(1, $max));
+    return $values;
+  }
+
 }

core/modules/datetime/src/Plugin/Field/FieldType/DateTimeItem.php

@@ -7,6 +7,7 @@
 
 namespace Drupal\datetime\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\TypedData\DataDefinition;
@@ -101,6 +102,24 @@ public function settingsForm(array &$form, FormStateInterface $form_state, $has_
     return $element;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $type = $field_definition->getSetting('datetime_type');
+
+    // Just pick a date in the past year. No guidance is provided by this Field
+    // type.
+    $timestamp = REQUEST_TIME - mt_rand(0, 86400*365);
+    if ($type == DateTimeItem::DATETIME_TYPE_DATE) {
+      $values['value'] = gmdate(DATETIME_DATE_STORAGE_FORMAT, $timestamp);
+    }
+    else {
+      $values['value'] = gmdate(DATETIME_DATETIME_STORAGE_FORMAT, $timestamp);
+    }
+    return $values;
+  }
+
   /**
    * {@inheritdoc}
    */

core/modules/datetime/src/Tests/DateTimeItemTest.php

@@ -74,6 +74,11 @@ public function testDateTimeItem() {
     $entity->save();
     $entity = entity_load('entity_test', $id);
     $this->assertEqual($entity->field_datetime->value, $new_value);
+
+    // Test the generateSampleValue() method.
+    $entity = entity_create('entity_test');
+    $entity->field_datetime->generateSampleItems();
+    $this->entityValidateAndSave($entity);
   }
 
   /**

core/modules/entity_reference/src/Tests/EntityReferenceItemTest.php

@@ -112,6 +112,12 @@ public function testContentEntityReferenceItem() {
     $term2->delete();
     $entity = entity_create('entity_test', array('name' => $this->randomMachineName()));
     $entity->save();
+
+    // Test the generateSampleValue() method.
+    $entity = entity_create('entity_test');
+    $entity->field_test_taxonomy_term->generateSampleItems();
+    $entity->field_test_taxonomy_vocabulary->generateSampleItems();
+    $this->entityValidateAndSave($entity);
   }
 
   /**

core/modules/field/src/Tests/Boolean/BooleanItemTest.php

@@ -72,6 +72,11 @@ public function testBooleanItem() {
     $entity->save();
     $entity = entity_load('entity_test', $id);
     $this->assertEqual($entity->field_boolean->value, $new_value);
+
+    // Test sample item generation.
+    $entity = entity_create('entity_test');
+    $entity->field_boolean->generateSampleItems();
+    $this->entityValidateAndSave($entity);
   }
 
 }

core/modules/field/src/Tests/Email/EmailItemTest.php

@@ -69,6 +69,11 @@ public function testEmailItem() {
     $entity->save();
     $entity = entity_load('entity_test', $id);
     $this->assertEqual($entity->field_email->value, $new_value);
+
+    // Test sample item generation.
+    $entity = entity_create('entity_test');
+    $entity->field_email->generateSampleItems();
+    $this->entityValidateAndSave($entity);
   }
 
 }

core/modules/field/src/Tests/FieldUnitTestBase.php

@@ -125,6 +125,24 @@ protected function entitySaveReload(EntityInterface $entity) {
     return $controller->load($entity->id());
   }
 
+  /**
+   * Validate and save entity. Fail if violations are found.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $entity
+   *   The entity to save.
+   *
+   * @return void
+   */
+  protected function entityValidateAndSave(EntityInterface $entity) {
+    $violations = $entity->validate();
+    if ($violations->count()) {
+      $this->fail($violations);
+    }
+    else {
+      $entity->save();
+    }
+  }
+
   /**
    * Generate random values for a field_test field.
    *

core/modules/field/src/Tests/Number/NumberItemTest.php

@@ -91,6 +91,13 @@ public function testNumberItem() {
     $this->assertEqual($entity->field_integer->value, $new_integer);
     $this->assertEqual($entity->field_float->value, $new_float);
     $this->assertEqual($entity->field_decimal->value, $new_decimal);
+
+    /// Test sample item generation.
+    $entity = entity_create('entity_test');
+    $entity->field_integer->generateSampleItems();
+    $entity->field_float->generateSampleItems();
+    $entity->field_decimal->generateSampleItems();
+    $this->entityValidateAndSave($entity);
   }
 
 }

core/modules/file/src/Plugin/Field/FieldType/FileItem.php

@@ -8,6 +8,8 @@
 namespace Drupal\file\Plugin\Field\FieldType;
 
 use Drupal\Component\Utility\Bytes;
+use Drupal\Component\Utility\Random;
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem;
 use Drupal\Core\Form\FormStateInterface;
@@ -303,6 +305,25 @@ public function getUploadValidators() {
     return $validators;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $random = new Random();
+    $settings = $field_definition->getSettings();
+
+    // Generate a file entity.
+    $destination = $settings['uri_scheme'] . '://' . $settings['file_directory'] . $random->name(10, TRUE) . '.txt';
+    $data = $random->paragraphs(3);
+    $file = file_save_data($data, $destination, FILE_EXISTS_ERROR);
+    $values = array(
+      'target_id' => $file->id(),
+      'display' => (int)$settings['display_default'],
+      'description' => $random->sentences(10),
+    );
+    return $values;
+  }
+
   /**
    * Determines whether an item should be displayed when rendering the field.
    *

core/modules/file/src/Tests/FileItemTest.php

@@ -95,6 +95,11 @@ public function testFileItem() {
     // a non-existing entity.
     $file2->delete();
     $entity->delete();
+
+    // Test the generateSampleValue() method.
+    $entity = entity_create('entity_test');
+    $entity->file_test->generateSampleItems();
+    $this->entityValidateAndSave($entity);
   }
 
 }

core/modules/image/src/Plugin/Field/FieldType/ImageItem.php

@@ -7,9 +7,12 @@
 
 namespace Drupal\image\Plugin\Field\FieldType;
 
+use Drupal\Component\Utility\Random;
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\TypedData\DataDefinition;
+use Drupal\file\Entity\File;
 use Drupal\file\Plugin\Field\FieldType\FileItem;
 
 /**
@@ -311,6 +314,56 @@ public function preSave() {
     }
   }
 
+  /**