theming D8

Problem:

I need to place a block added by another module on my page. I cannot add it by placing the block on a region. Because there is specific placement on the content region itself

Solution:

Add the block programatically to the page. We can get the block content programatically on a hook_preprocess function and add it to the $variables to print on the twig template

Problem: There is no specific function in Drupal 8 which we can use to get all blocks assigned to a region. We used to have a function called block_get_blocks_by_region in Drupal 7 to do this

Solution : Although we don't have a specific function we have the tools in Drupal 8 s Object oriented hierarchy to do the same. Here is the code

 

function my_module_get_blocks_by_region($region) {

  $blocks = \Drupal::entityTypeManager()

    ->getStorage('block')->loadByProperties([