class BlockContentTestHooks

class BlockContentTestHooks {
    
    /**
     * Implements hook_block_content_view().
     */
    public function blockContentView(array &$build, BlockContent $block_content, $view_mode) {
        // Add extra content.
        $build['extra_content'] = [
            '#markup' => '<blink>Wow</blink>',
        ];
    }
    
    /**
     * Implements hook_block_content_presave().
     */
    public function blockContentPresave(BlockContent $block_content) {
        if ($block_content->label() == 'testing_block_content_presave') {
            $block_content->setInfo($block_content->label() . '_presave');
        }
        // Determine changes.
        if (!empty($block_content->original) && $block_content->original
            ->label() == 'test_changes') {
            if ($block_content->original
                ->label() != $block_content->label()) {
                $block_content->setInfo($block_content->label() . '_presave');
                // Drupal 1.0 release.
                $block_content->changed = 979534800;
            }
        }
    }
    
    /**
     * Implements hook_block_content_update().
     */
    public function blockContentUpdate(BlockContent $block_content) {
        // Determine changes on update.
        if (!empty($block_content->original) && $block_content->original
            ->label() == 'test_changes') {
            if ($block_content->original
                ->label() != $block_content->label()) {
                $block_content->setInfo($block_content->label() . '_update');
            }
        }
    }
    
    /**
     * Implements hook_block_content_insert().
     *
     * This tests saving a block_content on block_content insert.
     *
     * @see \Drupal\block_content\Tests\BlockContentSaveTest::testBlockContentSaveOnInsert()
     */
    public function blockContentInsert(BlockContent $block_content) {
        // Set the block_content title to the block_content ID and save.
        if ($block_content->label() == 'new') {
            $block_content->setInfo('BlockContent ' . $block_content->id());
            $block_content->setNewRevision(FALSE);
            $block_content->save();
        }
        if ($block_content->label() == 'fail_creation') {
            throw new \Exception('Test exception for rollback.');
        }
    }

}