How to convert image in webp format programmatically?

We are giving an example for convert normal image to webp image format programmatically. Here all code/examples are already used in our projects.

Example:

use Drupal\image\Entity\ImageStyle;
use Drupal\media\Entity\Media;
use Drupal\responsive_background_image\ResponsiveBackgroundImage;

if ($tab_img = $tab_entity->get('field_image')->getValue()) {

          $tab_img = array_shift($tab_img);

          $mid = $tab_img['target_id'];

          $media = Media::load($mid);

          $fid = $media->field_image->target_id; 

          // if you want simple image url..

          $style = 'max_160w';  //pass image format

          $url = content_asset_image_url($fid, $style);

          $variables['tab_titles'][$tab['target_id']]['icon'] = $url;

          // if you want image convert into webp image format..

          $file = File::load($fid);

          $uri = $file->getFileUri();

          $variables['tab_titles'][$tab['target_id']]['icon']  = [

            '#theme' => 'responsive_image',

            '#responsive_image_style_id' => 'responsive_asset_300x300',  //pass responsive image format

            '#alt' => 'Resource Content Asset',

            '#uri' => $uri,

            // Add `#attributes` key with alt text.

            '#attributes' => [

              'data-lazy'=> TRUE,

            ],

          ];

        }

 // Content Asset function to get Image URL

function content_asset_image_url($file_id, $style_choice) {

  $file = File::load($file_id);

  $image_uri = $file->getFileUri();

  $style = ImageStyle::load($style_choice);

  $url = $style->buildUrl($image_uri);

  return $url;

}

Note: If have any suggestions or issue regarding 'How to convert image in webp format programmatically?' then you can ask by comments. 

Difference between hook_entity_presave and hook_entity_insert ?

Simple way to differentiate both hooks is the 'ID' is not available in hook_entity_presave() ("pre meaning before, and without saved ID is not assigned in database),
But this 'ID' will be available in hook_entity_insert().

Example:
function mymodule_node_insert(NodeInterface $node) { 
  $nid = $node->id();
}
OR
function mymodule_node_insert($node) {
  if ($node->getType() == 'your content type') {
        $node->setTitle('New entity ' . $node->id()); // to update title with node id
        $node->field_test = 'Id' . $node->id();  // or, to update a text field with node id
        $node->save();
  }
}

function mymodule_entity_presave(Drupal\Core\Entity\EntityInterface $entity) {
  if ($entity->getEntityType()->id() == 'node') {
    $entity->setTitle('New Title here');
    //Note : Not to save, because it's automatic.   
  }
}
OR
function mymodule_node_presave(Drupal\node\NodeInterface $node) {
  $node->setTitle('Edited Title');
  $node->set('body', 'this is the new body section');
  //Note : Not to save, because it's automatic.
}

Note: If have any suggestions or issue regarding 'Difference between hook_entity_presave and hook_entity_insert ?' then you can ask by comments.  

How to delete content node programmatically in drupal 8?

Here we have simple way to 'delete content programmatically'. We can use this code in our "custom module/plugin" or  "hook_entity_predelete" or in "hook_entity_delete". Just use that simple code..

Syntax:

 $result = \Drupal::entityQuery("node")
                ->condition('type', 'resources');  // here change the content type of your
 $nids = $result->execute();

  if (!empty($nids)) {
    $nodes = \Drupal\node\Entity\Node::loadMultiple($nids);
    $nodes->delete();
  }


#Extra notes: here we can add more conditions in 'entityQuery' as per our requirement.









Note: How to delete content node programmatically in drupal 8?

Media entity fields render in drupal 8 Node Twig template.

If we want to load media entity fields on node twig template. It's easy to load media entity, Please have a look..

{# call to media entity fields on node twig #}

{% for key, item in node.field_document_entity_browser %} 
// This is the node field which is connect to media field `field_document_entity_browser`..
{% if node.field_document_entity_browser[key].entity %}
// here we are rendering media entity field which machine name is `field_capt2120`..                           
{{ node.field_document_entity_browser.entity.field_capt2120[key].value }}

// here we are rendering media entity image field which machine name is `field_media_image`..        
{%if item.entity %}
{% set media = item.entity %}
{% set file = media.field_media_image.entity %}
{% set uri = file_url(file.uri.value) %}
                              
<img src="{{ uri }}" alt="{{ media.name.value }}" />
                          
 {% endif %}                           
                                                                                     
 {% endif %}
  {% endfor %}



Note: If have any suggestions or issue regarding 'Media entity fields render in drupal 8 Node Twig template.' then you can ask by comments.