abstract class FeedsPlugin in Feeds 7

Implement source interface for all plugins.

Note how this class does not attempt to store source information locally. Doing this would break the model where source information is represented by an object that is being passed into a Feed object and its plugins.

Hierarchy

• class \FeedsConfigurable
  • class \FeedsPlugin implements FeedsSourceInterface

1 string reference to 'FeedsPlugin'

_feeds_feeds_plugins in ./feeds.plugins.inc

Break out for feeds_feed_plugins().

File

plugins/FeedsPlugin.inc, line 15

Definition of FeedsPlugin class.

abstract class FeedsPlugin extends FeedsConfigurable implements FeedsSourceInterface {

  /**
   * Constructor.
   *
   * Initialize class variables.
   */
  protected function __construct($id) {
    parent::__construct($id);
    $this->source_config = $this
      ->sourceDefaults();
  }

  /**
   * Save changes to the configuration of this object.
   * Delegate saving to parent (= Feed) which will collect
   * information from this object by way of getConfig() and store it.
   */
  public function save() {
    feeds_importer($this->id)
      ->save();
  }

  /**
   * Returns TRUE if $this->sourceForm() returns a form.
   */
  public function hasSourceConfig() {
    $form = $this
      ->sourceForm(array());
    return !empty($form);
  }

  /**
   * Implements FeedsSourceInterface::sourceDefaults().
   */
  public function sourceDefaults() {
    $values = array_flip(array_keys($this
      ->sourceForm(array())));
    foreach ($values as $k => $v) {
      $values[$k] = '';
    }
    return $values;
  }

  /**
   * Callback methods, exposes source form.
   */
  public function sourceForm($source_config) {
    return array();
  }

  /**
   * Validation handler for sourceForm.
   */
  public function sourceFormValidate(&$source_config) {
  }

  /**
   * A source is being saved.
   */
  public function sourceSave(FeedsSource $source) {
  }

  /**
   * A source is being deleted.
   */
  public function sourceDelete(FeedsSource $source) {
  }

  /**
   * Loads on-behalf implementations from mappers/ directory.
   *
   * FeedsProcessor::map() does not load from mappers/ as only node and user
   * processor ship with on-behalf implementations.
   *
   * @see FeedsNodeProcessor::map()
   * @see FeedsUserProcessor::map()
   *
   * @todo: Use CTools Plugin API.
   */
  protected static function loadMappers() {
    static $loaded = FALSE;
    if (!$loaded) {
      $path = drupal_get_path('module', 'feeds') . '/mappers';
      $files = drupal_system_listing('/.*\\.inc$/', $path, 'name', 0);
      foreach ($files as $file) {
        if (strstr($file->uri, '/mappers/')) {
          require_once "./{$file->uri}";
        }
      }
    }
    $loaded = TRUE;
  }

  /**
   * Get all available plugins.
   */
  public static function all() {
    ctools_include('plugins');
    $plugins = ctools_get_plugins('feeds', 'plugins');
    $result = array();
    foreach ($plugins as $key => $info) {
      if (!empty($info['hidden'])) {
        continue;
      }
      $result[$key] = $info;
    }

    // Sort plugins by name and return.
    uasort($result, 'feeds_plugin_compare');
    return $result;
  }

  /**
   * Determines whether given plugin is derived from given base plugin.
   *
   * @param $plugin_key
   *   String that identifies a Feeds plugin key.
   * @param $parent_plugin
   *   String that identifies a Feeds plugin key to be tested against.
   *
   * @return
   *   TRUE if $parent_plugin is directly *or indirectly* a parent of $plugin,
   *   FALSE otherwise.
   */
  public static function child($plugin_key, $parent_plugin) {
    ctools_include('plugins');
    $plugins = ctools_get_plugins('feeds', 'plugins');
    $info = $plugins[$plugin_key];
    if (empty($info['handler']['parent'])) {
      return FALSE;
    }
    elseif ($info['handler']['parent'] == $parent_plugin) {
      return TRUE;
    }
    else {
      return self::child($info['handler']['parent'], $parent_plugin);
    }
  }

  /**
   * Determines the type of a plugin.
   *
   * @todo PHP5.3: Implement self::type() and query with $plugin_key::type().
   *
   * @param $plugin_key
   *   String that identifies a Feeds plugin key.
   *
   * @return
   *   One of the following values:
   *   'fetcher' if the plugin is a fetcher
   *   'parser' if the plugin is a parser
   *   'processor' if the plugin is a processor
   *   FALSE otherwise.
   */
  public static function typeOf($plugin_key) {
    if (self::child($plugin_key, 'FeedsFetcher')) {
      return 'fetcher';
    }
    elseif (self::child($plugin_key, 'FeedsParser')) {
      return 'parser';
    }
    elseif (self::child($plugin_key, 'FeedsProcessor')) {
      return 'processor';
    }
    return FALSE;
  }

  /**
   * Gets all available plugins of a particular type.
   *
   * @param $type
   *   'fetcher', 'parser' or 'processor'
   */
  public static function byType($type) {
    $plugins = self::all();
    $result = array();
    foreach ($plugins as $key => $info) {
      if ($type == self::typeOf($key)) {
        $result[$key] = $info;
      }
    }
    return $result;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
FeedsConfigurable::$config	protected	property
FeedsConfigurable::$disabled	protected	property	CTools export enabled status of this object.
FeedsConfigurable::$export_type	protected	property
FeedsConfigurable::$id	protected	property
FeedsConfigurable::addConfig	public	function	Similar to setConfig but adds to existing configuration.
FeedsConfigurable::configDefaults	public	function	Return default configuration.	6
FeedsConfigurable::configForm	public	function	Return configuration form for this object. The keys of the configuration form must match the keys of the array returned by configDefaults().	9
FeedsConfigurable::configFormSubmit	public	function	Submission handler for configForm().	2
FeedsConfigurable::configFormValidate	public	function	Validation handler for configForm().	3
FeedsConfigurable::copy	public	function	Copy a configuration.	1
FeedsConfigurable::existing	public	function	Determine whether this object is persistent and enabled. I. e. it is defined either in code or in the database and it is enabled.	1
FeedsConfigurable::getConfig	public	function	Implements getConfig().	1
FeedsConfigurable::instance	public static	function	Instantiate a FeedsConfigurable object.	1
FeedsConfigurable::setConfig	public	function	Set configuration.
FeedsConfigurable::__get	public	function	Override magic method __get(). Make sure that $this->config goes through getConfig()
FeedsPlugin::all	public static	function	Get all available plugins.
FeedsPlugin::byType	public static	function	Gets all available plugins of a particular type.
FeedsPlugin::child	public static	function	Determines whether given plugin is derived from given base plugin.
FeedsPlugin::hasSourceConfig	public	function	Returns TRUE if $this->sourceForm() returns a form. Overrides FeedsSourceInterface::hasSourceConfig
FeedsPlugin::loadMappers	protected static	function	Loads on-behalf implementations from mappers/ directory.
FeedsPlugin::save	public	function	Save changes to the configuration of this object. Delegate saving to parent (= Feed) which will collect information from this object by way of getConfig() and store it. Overrides FeedsConfigurable::save
FeedsPlugin::sourceDefaults	public	function	Implements FeedsSourceInterface::sourceDefaults(). Overrides FeedsSourceInterface::sourceDefaults	1
FeedsPlugin::sourceDelete	public	function	A source is being deleted. Overrides FeedsSourceInterface::sourceDelete	2
FeedsPlugin::sourceForm	public	function	Callback methods, exposes source form. Overrides FeedsSourceInterface::sourceForm	3
FeedsPlugin::sourceFormValidate	public	function	Validation handler for sourceForm. Overrides FeedsSourceInterface::sourceFormValidate	2
FeedsPlugin::sourceSave	public	function	A source is being saved. Overrides FeedsSourceInterface::sourceSave	2
FeedsPlugin::typeOf	public static	function	Determines the type of a plugin.
FeedsPlugin::__construct	protected	function	Constructor. Overrides FeedsConfigurable::__construct