Script for detecting duplicate assets & merging log records

asset_dedup.php

<?php

use Drupal\asset\Entity\Asset;
use Drupal\log\Entity\Log;

// Debug flag, leave TRUE to not perform any actions.
$debug = TRUE;
#$debug = FALSE;

// Only query assets created by this username.
$user_name = 'SurveyStack';

// Hosts to to not run this script on.
$denylist = [
  //'farmos.ddev.site',
];

$host = \Drupal::request()->getHost();
if (in_array($host, $denylist)) {
  log_message('Host in denylist.');
  return;
}

// Query names that are duplicated across plant assets.
$name_duplicates = \Drupal::entityQueryAggregate('asset')
  ->condition('uid.entity:user.name', $user_name)
  ->condition('type', 'plant')
  ->groupBy('name')
  ->aggregate('name', 'count')
  ->conditionAggregate('name', 'count', 1, '>')
  ->execute();
print(PHP_EOL);
log_message('Querying assets with duplicate names... ');
foreach ($name_duplicates as $name_duplicate) {

  // Log the duplicate.
  print(PHP_EOL);
  $name = $name_duplicate['name'];
  $count = $name_duplicate['name_count'];
  log_message("Duplicate: '$name' Count: $count");

  // Load the assets.
  $asset_ids = \Drupal::entityQuery('asset')
    ->condition('uid.entity:user.name', $user_name)
    ->condition('type', 'plant')
    ->condition('name', $name)
    ->sort('id', 'ASC')
    ->execute();
  $assets = Asset::loadMultiple($asset_ids);

  // Determine each asset's location.
  // Keep track if we find a location for any assets here.
  $location_count = 0;
  /** @var \Drupal\farm_location\AssetLocationInterface $asset_location */
  $asset_location = \Drupal::service('asset.location');
  $asset_locations = [];
  foreach ($assets as $asset) {
    if ($asset_location->hasLocation($asset)) {
      ++$location_count;
      $location = $asset_location->getLocation($asset);
      $location = reset($location);
      $asset_locations[$asset->id()] = $location;
    }
  }

  if ($location_count === 0) {
    log_message('None of the duplicated assets have a location.', 'warning');
  }
  elseif ($location_count === 1) {
    $label = $location->label();
    log_message('Target location: ' . $label);
  }
  elseif ($location_count > 1) {
    log_message('Duplicated assets have multiple locations.', 'warning');
    log_message('These assets should be manually reviewed.', 'warning');
  }

  // Query logs that reference these assets.
  $log_asset_ids_result = \Drupal::entityQueryAggregate('log')
    ->condition('asset.entity:asset.name', $name)
    ->groupBy('asset.entity:asset.id')
    ->aggregate('id', 'count')
    ->execute();
  $log_asset_ids = array_column($log_asset_ids_result, 'id');

  // Loop through assets and determine operations.
  // Keep track if we have found the "canonical" asset to keep.
  $found_canonical = FALSE;
  log_message('Asset name    -- ID -- location -- log count -- operation -- url');
  foreach ($assets as $asset) {

    // Strings to output.
    $asset_id = $asset->id();
    $label = $asset->label();
    $url = $asset->toUrl()->setAbsolute()->toString();
    $current_location = $asset_locations[$asset_id] ? $asset_locations[$asset_id]->label() : ' (none) ';

    // Determine the number of logs associated with the asset.
    $log_count = 0;
    $index = array_search($asset_id, $log_asset_ids);
    if (is_numeric($index)) {
      $log_count = $log_asset_ids_result[$index]['id_count'];
    }

    // Determine the operation.
    // Delete assets unless they have logs that reference them.
    $operation = 'delete';

    // If logs reference the asset, keep or merge.
    if ($log_count > 0) {

      // Keep the first asset that has logs.
      if ($found_canonical == FALSE) {
        $operation = 'keep';
        $found_canonical = $asset_id;
      }
      // Else merge the asset and update logs.
      else {
        $operation = 'merge';
      }
    }

    // Finally, if there are multiple locations override the operation
    // to keep assets that have logs, they need manual review.
    // Assets that do not have any logs can always be deleted.
    if ($log_count != 0 && $location_count > 1) {
      $operation = 'keep';
    }

    log_message("$label -- $asset_id -- $current_location -- $log_count -- $operation -- $url");

    // Perform the operation if $debug == FALSE.
    if (!$debug) {

      // Merge the asset.
      if ($operation == 'merge' && $found_canonical != FALSE) {

        // Load logs that reference this asset.
        $log_ids = \Drupal::entityQuery('log')
          ->condition('asset.entity:asset.id', $asset_id)
          ->execute();
        $logs = Log::loadMultiple($log_ids);

        // Remove the asset id from each log and add the canonical asset id.
        foreach ($logs as $log) {

          /** @var \Drupal\Core\Field\EntityReferenceFieldItemListInterface $asset_field */
          $asset_field = $log->get('asset');
          $log_assets = $asset_field->getValue();

          // Find the existing asset_id.
          $index = array_search($asset_id, array_column($log_assets, 'target_id'));
          if (is_int($index)) {
            // Remove the index.
            $asset_field->removeItem($index);
          }

          // Add the canonical if doesn't already exist.
          $index = array_search((int) $found_canonical, array_column($log_assets, 'target_id'));
          if ($index === FALSE) {
            $asset_field->appendItem($found_canonical);
          }

          // Finally, save the log.
          $log->save();
          $log_id = $log->id();
          $log_name = $log->label();
          log_message("Updated log $log_id '$log_name'", 'operation');
        }

        // After all logs are merged, delete the asset.
        $operation = 'delete';
      }

      if ($operation == 'delete') {
        try {
          $asset->delete();
          log_message("Deleted asset $asset_id '$label'", 'operation');
        } catch (Exception $e) {
          log_message("Could not delete asset $asset_id '$label'. Reason: " . $e->getMessage(), 'error');
          continue;
        }
      }
    }
  }

}
print(PHP_EOL);

/**
 * Helper function to print/log messages.
 *
 * @param $message
 *   The message to print.
 * @param $level
 *   The message level prefix.
 */
function log_message($message, $level = 'info') {
  $prefix = [
    'info' => '',
    'operation' => '    OP: ',
    'warning' => 'WARNING: ',
    'error' => 'ERROR: ',
  ];
  print($prefix[$level] . $message . PHP_EOL);
}

example.md

Test cases:

(NOTE: I didn't create all the log types specified here, what's most important is if the asset has any logs referencing it. And location requires DONE movement logs.)

// Test cases.
// Name -- location -- logs -- operation

// Typical duplicated plant asset
// corn  5/05/20 - -- (seeding, observation) (keep)
// corn  5/05/20 - field 1 (input) (merge, delete)


// Duplicated plant with empty plant
// beets 6/20/20 - -- (seeding, observation) (keep)
// beets 6/20/20 - field 1 (input, activity) (merge, delte)
// beets 6/20/20 - -- (none) (delete)

// Two unique assets, one empty
// squash 6/10/20 - field 1 (seeding) (keep)
// squash 6/10/20 - field 2 (seeding) (keep)
// squash 6/10/20 - -- (none) (delete)

// Assets without location or logs
// radish 3/15/20 - -- (none) (delete)
// radish 3/18/20 - -- (none) (delete)

// Rare edge case, should be two, both duplicated
// 5  - 2020 carrots - field 1
// 10 - 2020 carrots - --
// 12 - 2020 carrots - field 2
// 15 - 2020 carrots - --

Output for given test cases

$ ddev drush scr asset_dedup.php

Querying assets with duplicate names... 

Duplicate: 'beets 6/20/20' Count: 3
Target location: Field 2
Asset name    -- ID -- location -- log count -- operation -- url
beets 6/20/20 -- 6 --  (none)  -- 2 -- keep -- https://farmos.ddev.site/asset/6
beets 6/20/20 -- 7 -- Field 2 -- 3 -- merge -- https://farmos.ddev.site/asset/7
beets 6/20/20 -- 8 --  (none)  -- 0 -- delete -- https://farmos.ddev.site/asset/8

Duplicate: 'carrots 04/10/20' Count: 2
Target location: Field 1
Asset name    -- ID -- location -- log count -- operation -- url
carrots 04/10/20 -- 13 -- Field 1 -- 1 -- keep -- https://farmos.ddev.site/asset/13
carrots 04/10/20 -- 14 --  (none)  -- 1 -- merge -- https://farmos.ddev.site/asset/14

Duplicate: 'corn 5/05/20' Count: 4
WARNING: Duplicated assets have multiple locations.
WARNING: These assets should be manually reviewed.
Asset name    -- ID -- location -- log count -- operation -- url
corn 5/05/20 -- 1 --  (none)  -- 2 -- keep -- https://farmos.ddev.site/asset/1
corn 5/05/20 -- 5 -- Field 1 -- 2 -- keep -- https://farmos.ddev.site/asset/5
corn 5/05/20 -- 15 -- Field 2 -- 1 -- keep -- https://farmos.ddev.site/asset/15
corn 5/05/20 -- 16 --  (none)  -- 0 -- delete -- https://farmos.ddev.site/asset/16

Duplicate: 'radish 3/15/20' Count: 2
WARNING: None of the duplicated assets have a location.
Asset name    -- ID -- location -- log count -- operation -- url
radish 3/15/20 -- 11 --  (none)  -- 0 -- delete -- https://farmos.ddev.site/asset/11
radish 3/15/20 -- 12 --  (none)  -- 0 -- delete -- https://farmos.ddev.site/asset/12

Duplicate: 'squash 6/10/20' Count: 2
WARNING: Duplicated assets have multiple locations.
WARNING: These assets should be manually reviewed.
Asset name    -- ID -- location -- log count -- operation -- url
squash 6/10/20 -- 9 -- Field 3 -- 2 -- keep -- https://farmos.ddev.site/asset/9
squash 6/10/20 -- 10 -- Field 2 -- 2 -- keep -- https://farmos.ddev.site/asset/10

Modified logic so duplicated assets with no logs are always deleted