How to add image to node programmaticly? - drupal

Question

There is an entity in which I added the Image field. The database has a custom table with different columns, including the id of the images.
Previously, I created a batch that writes data from this table to entity fields. That is, it creates many entities from the records in the table with filled fields. I need to do the same but for images. Part of the code from the batch:
if (empty($entity_id)) {
$info = [
'type' => 'product',
'title' => $productTitle,
'field_name' => (string) $product->name,
'field_product_cid' => (string) $product->cid,
'field_custom_url' => $product->url,
'uid' => 1,
// here I need to add an image to the field_image field from the table
];
$node = $this->entityTypeManager->getStorage('node')->create($info);
$node->save();
}
else {
$storage = $this->entityTypeManager->getStorage('node');
$node = $storage->load($entity_id);
// Change fields of node.
$node->set('title', $productTitle);
$node->set('field_name', (string) $product->name);
$node->set('field_custom_url', $product->url);
// and here change field_image if the node already exists
$node->save();
}
}

Answer 1

Someting like this:
$node = $storage->load($entity_id);
$image_source_path = '/some/path'
$image_target_directory = 'public://some/path';
$image_data = file_get_contents ($image_source_path);
$image_alt = 'some alt text';
// Drupal 9 >= 9.3.0 or Drupal 10
$image_object = \Drupal::service('file.repository')
->writeData($$image_data, $image_target);
// Drupal 8
//$image_object = file_save_data ($image_data, $image_target);
$node->set('field_image', [
'target_id' => $image_object->id(),
'alt' => $image_alt,
]);
$node->save();