Allow other modules to prevent continuous job items being added

1. +++ b/src/ContinuousManager.php
   @@ -119,7 +130,12 @@ class ContinuousManager {
   +    $this->eventDispatcher->dispatch(TmgmtEvents::SHOULD_CREATE_JOB, $event);
   

   I think it makes more sense to name that class ContinuousEvents.

2. +++ b/src/Events/ShouldCreateJobEvent.php
   @@ -0,0 +1,132 @@
   + * Implementation of SHOULD_CREATE_JOB event.
   + *
   + * This class recives the same arguments as
   + * \Drupal\tmgmt\ContinuousSourceInterface::shouldCreateContinuousItem().
   + */
   +class ShouldCreateJobEvent extends Event {
   

   I'll try to improve the docs a bit here.

3. +++ b/src/Events/ShouldCreateJobEvent.php
   @@ -0,0 +1,132 @@
   +   * @var \Drupal\tmgmt\Entity\Job
   

   ...Interface

4. +++ b/src/Events/ShouldCreateJobEvent.php
   @@ -0,0 +1,132 @@
   +   * The plugin name.
   

   .. ID

5. +++ b/src/Events/ShouldCreateJobEvent.php
   @@ -0,0 +1,132 @@
   +   * EntityUsageEvents constructor.
   

   .

6. +++ b/src/Events/ShouldCreateJobEvent.php
   @@ -0,0 +1,132 @@
   +   *   A flag stating wheter or not the job should be created.
   

   whether

7. +++ b/src/Events/TmgmtEvents.php
   @@ -0,0 +1,17 @@
   +  /**
   +   * SHOULD_CREATE_JOB event occurs when determining if a job should be created.
   +   *
   

   improve this a bit as well.

8. +++ b/src/Tests/TranslatorTest.php
   @@ -202,4 +202,44 @@ class TranslatorTest extends TMGMTTestBase {
   +  /**
   +   * Test tmgmt events.
   +   */
   +  public function testTmgmtEvents() {
   +    $translator = parent::createTranslator();
   

   continuous events

9. +++ b/src/Tests/TranslatorTest.php
   @@ -202,4 +202,44 @@ class TranslatorTest extends TMGMTTestBase {
   +    // Test that SHOULD_CREATE_JOB event works.
   +    $node = [
   +      'type' => 'article',
   +      'langcode' => 'en',
   +      'title' => 'Testing SHOULD_CREATE_JOB event'
   +    ];
   +
   +    $this->createNode($node);
   +    $this->drupalGet('admin/tmgmt/job_items?state=All&source_language=All&target_language=All&job_type=All');
   +    $this->assertNoText('Testing SHOULD_CREATE_JOB event');
   

   I think it's better to avoid the UI and just check if we have any jobs here, and then create a node with a different label that will be added.

10. +++ b/tmgmt_test/src/EventSubscriber/TestTmgmtEventsSubscriber.php
    @@ -0,0 +1,55 @@
    +
    +  /**
    +   * GloballinkTmgmtEvents constructor.
    +   */
    +  public function __construct(EntityTypeManagerInterface $entity_type_manager) {
    

    .

Cleanup and moved the test to the existing kernel test coverage, just requires a few additional lines then.

interdiff is very big but it's mostly just comment changes and the moving the test.

Committed.