includes/cache.inc

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<?php
// $Id: cache.inc,v 1.25 2009/06/01 23:33:37 merlinofchaos Exp $
function _views_include_handlers() {
  views_module_include('views.inc');
}

function _views_include_default_views() {
  views_module_include('views_default.inc');
}

function _views_fetch_data($table = NULL) {
  static $cache = NULL;
  if (!isset($cache)) {
    $start = views_microtime();
    // NOTE: This happens whether we retrieve them from cache or otherwise.
    views_include_handlers();

    $data = views_cache_get('views_data', TRUE);
    if (!empty($data->data)) {
      $cache = $data->data;
    }

    if (empty($cache)) {
      $cache = module_invoke_all('views_data');
      foreach (module_implements('views_data_alter') as $module) {
        $function = $module . '_views_data_alter';
        $function($cache);
      }

      views_cache_set('views_data', $cache, TRUE);
    }

    vpr('Views data build time: ' . (views_microtime() - $start) * 1000 . ' ms');
  }

  if (!$table) {
    return $cache;
  }
  if (isset($cache[$table])) {
    return $cache[$table];
  }

  // Return an empty array if there is no match.
  return array();
}

function _views_fetch_plugin_data($type = NULL, $plugin = NULL) {
  static $cache = NULL;
  if (!isset($cache)) {
    $start = views_microtime();
    views_include_handlers();

    $cache = views_discover_plugins();

    vpr('Views plugins build time: ' . (views_microtime() - $start) * 1000 . ' ms');
  }

  if (!$type && !$plugin) {
    return $cache;
  }
  else if (!$plugin) {
    // Not in the if above so the else below won't run
    if (isset($cache[$type])) {
      return $cache[$type];
    }
  }
  else if (isset($cache[$type][$plugin])) {
    return $cache[$type][$plugin];
  }

  // Return an empty array if there is no match.
  return array();
}

function _views_discover_default_views() {
  static $cache = NULL;

  if (!isset($cache)) {
    $data = views_cache_get('views_default_views', TRUE);

    if (isset($data->data) && is_array($data->data)) {
      $cache = $data->data;
    }
    else {
      views_include_default_views();
      $defaults = module_invoke_all('views_default_views');
      $cache = array();

      foreach ($defaults as $name => $view) {
        // Only views with a sufficiently high api version are eligible.
        if (isset($view->api_version) && $view->api_version >= 2) {
          // Do not cache dead handlers.
          $view->destroy();
          $cache[$name] = $view;
        }
      }

      // Allow modules to modify default views before they are cached.
      drupal_alter('views_default_views', $cache);

      views_cache_set('views_default_views', $cache, TRUE);
    }
  }

  return $cache;
}

function views_cache_set($cid, $data, $use_language = FALSE) {
  global $language;

  if (variable_get('views_skip_cache', FALSE)) {
    return;
  }
  if ($use_language) {
    $cid .= ':' . $language->language;
  }

  cache_set($cid, $data, 'cache_views');
}

function views_cache_get($cid, $use_language = FALSE) {
  global $language;

  if (variable_get('views_skip_cache', FALSE)) {
    return 0;
  }
  if ($use_language) {
    $cid .= ':' . $language->language;
  }

  return cache_get($cid, 'cache_views');
}

function views_object_cache_get($obj, $name, $skip_cache = FALSE) {
  static $cache = array();
  $key = "$obj:$name";
  if ($skip_cache) {
    unset($cache[$key]);
  }

  if (!array_key_exists($key, $cache)) {
    $data = db_fetch_object(db_query("SELECT * FROM {views_object_cache} WHERE sid = '%s' AND obj = '%s' AND name = '%s'", session_id(), $obj, $name));
    if ($data) {
      $cache[$key] = unserialize($data->data);
    }
  }
  return isset($cache[$key]) ? $cache[$key] : NULL;
}

function views_object_cache_set($obj, $name, $cache) {
  views_object_cache_clear($obj, $name);
  db_query("INSERT INTO {views_object_cache} (sid, obj, name, data, updated) VALUES ('%s', '%s', '%s', '%s', %d)", session_id(), $obj, $name, serialize($cache), time());
}

function views_object_cache_clear($obj, $name) {
  db_query("DELETE FROM {views_object_cache} WHERE sid = '%s' AND obj = '%s' AND name = '%s'", session_id(), $obj, $name);
}

function views_object_cache_clean($age = NULL) {
  if (empty($age)) {
    $age = 86400 * 7; // 7 days
  }
  db_query("DELETE FROM {views_object_cache} WHERE updated < %d", time() - $age);
}

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