move the storage preparation responsibility

README.md

@@ -88,6 +88,9 @@ $body = \Drupal::service('entity_to_text_tika.extractor.file_to_text')->fromFile
 or for an advanced usage avoiding multiple calls to Tika:
 
 ```php
+// Anywhere at least once in the code (Eg. module.install) in order to prepare the storage.
+\Drupal::service('entity_to_text_tika.storage.local_file')->prepareStorage();
+
 // Load the already OCR'ed file if possible to avoid unecessary calls to Tika.
 $body = \Drupal::service('entity_to_text_tika.storage.local_file')->load($file, 'eng+fra');
 

modules/entity_to_text_tika/src/Storage/LocalFileStorage.php

@@ -62,8 +62,6 @@ public function load(File $file, string $langcode = 'eng'): ?string {
  * {@inheritdoc}
  */
  public function save(File $file, string $content, string $langcode = 'eng'): string {
- $this->prepareDestination();
-
  $fullpath = $this->getFullPath($file, $langcode);
  file_put_contents($fullpath, $content);
  return $fullpath;
@@ -98,9 +96,9 @@ private function getFullPath(File $file, string $langcode = 'eng'): string {
  }
 
  /**
- * Ensure the destination directory is ready to use.
+ * {@inheritdoc}
  */
- private function prepareDestination(): void {
+ public function prepareStorage(): void {
  $dest = self::DESTINATION;
  $this->fileSystem->prepareDirectory($dest, FileSystemInterface::CREATE_DIRECTORY);
  }

modules/entity_to_text_tika/src/Storage/StorageInterface.php

@@ -40,4 +40,11 @@ public function load(File $file, string $langcode = 'eng'): ?string;
  */
  public function save(File $file, string $content, string $langcode = 'eng'): string;
 
+ /**
+ * Ensure the storage is ready to store OCR text values.
+ *
+ * @return void
+ */
+ public function prepareStorage(): void;
+
 }