function history_read_multiple in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/history/history.module \history_read_multiple()

Retrieves the last viewed timestamp for each of the passed node IDs.

Parameters

array $nids: An array of node IDs.

Return value

array Array of timestamps keyed by node ID. If a node has been previously viewed by the user, the timestamp in seconds of when the last view occurred; otherwise, zero.

2 calls to history_read_multiple()

HistoryController::getNodeReadTimestamps in core/modules/history/src/Controller/HistoryController.php

Returns a set of nodes' last read timestamps.

history_read in core/modules/history/history.module

Retrieves the timestamp for the current user's last view of a specified node.

1 string reference to 'history_read_multiple'

history_write in core/modules/history/history.module

Updates 'last viewed' timestamp of the specified entity for the current user.

File

core/modules/history/history.module, line 65

Records which users have read which content.

Code

function history_read_multiple($nids) {
  $history =& drupal_static(__FUNCTION__, []);
  $return = [];
  $nodes_to_read = [];
  foreach ($nids as $nid) {
    if (isset($history[$nid])) {
      $return[$nid] = $history[$nid];
    }
    else {

      // Initialize value if current user has not viewed the node.
      $nodes_to_read[$nid] = 0;
    }
  }
  if (empty($nodes_to_read)) {
    return $return;
  }
  $result = \Drupal::database()
    ->query('SELECT nid, timestamp FROM {history} WHERE uid = :uid AND nid IN ( :nids[] )', [
    ':uid' => \Drupal::currentUser()
      ->id(),
    ':nids[]' => array_keys($nodes_to_read),
  ]);
  foreach ($result as $row) {
    $nodes_to_read[$row->nid] = (int) $row->timestamp;
  }
  $history += $nodes_to_read;
  return $return + $nodes_to_read;
}