Add function to get all media for a node

[mjordan]

This will be used to generate the media-level report described in #1.

[mjordan]

The Manage Media view bundled with the Islandora module provides a REST API to get all media attached to a node using requests like curl -v -u admin:islandora http://localhost:8000/node/266/media?_format=json. This snippet will pick out all the URLs for the media attached to node 1:

// $json is the JSON returned by the above URL.
$array = json_decode($json, true);

$media_fields = array(
  'field_media_file',
  'field_media_image',
  'field_media_audio_file',
  'field_media_video_file',
);

$media_use_tags = array();
foreach ($array as $media) {
  foreach ($media_fields as $media_field) {
    if (array_key_exists($media_field, $media)) {
      if (!in_array($media['field_media_use'][0]['url'], $media_use_tags)) {
        $tag_url = $media['field_media_use'][0]['url'];
      }
      $media_use_tags[$tag_url][] = $media[$media_field][0]['url'];
    }
  }
}

print_r($media_use_tags);

This will parse out URLs to the media files and group them by media use (Preservation Master, Original File, etc.);

Array
(
    [/taxonomy/term/15] => Array
        (
            [0] => http://localhost:8000/_flysystem/fedora/2018-11/iCamp%20CA%20-%20mjordan%20-%20taxi%20receipt.png
        )

    [/taxonomy/term/19] => Array
        (
            [0] => http://localhost:8000/_flysystem/fedora/2018-11/iCamp%20CA%20-%20mjordan%20-%20hotel%20receipt.pdf
            [1] => http://localhost:8000/_flysystem/fedora/2018-11/VP_academic_conference_fund_2019_islandora_conference.pdf
        )

    [/taxonomy/term/16] => Array
        (
            [0] => http://localhost:8000/_flysystem/fedora/2018-11/sample.mp3
            [1] => http://localhost:8000/_flysystem/fedora/2018-11/sample.mp4
        )

)

These Drupal URLs will need to be converted to Fedora URLs (via Gemini) if Riprap is polling Fedora.

[mjordan]

To get the taxonomy term name, use:

$term = \Drupal::entityTypeManager()->getStorage('taxonomy_term')->load($tid);
$name = $term->getName();

[mjordan]

Closed with 683cab0.