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<?php

/**

 * @file

 * Hooks provided by the Taxonomy module.

 */

/**

 * @addtogroup hooks

 * @{

 */

/**

 * Act on taxonomy vocabularies when loaded.

 *

 * Modules implementing this hook can act on the vocabulary objects before they

 * are returned by taxonomy_vocabulary_load_multiple().

 *

 * @param $vocabulary

 *   An array of taxonomy vocabulary objects.

 */

function hook_taxonomy_vocabulary_load($vocabularies) {

  $result = db_select('mytable', 'm')

    ->fields('m', array('vid', 'foo'))

    ->condition('m.vid', array_keys($vocabularies), 'IN')

    ->execute();

  foreach ($result as $record) {

    $vocabularies[$record->vid]->foo = $record->foo;

  }

}

/**

 * Act on taxonomy vocabularies before they are saved.

 *

 * Modules implementing this hook can act on the vocabulary object before it is

 * inserted or updated.

 *

 * @param $vocabulary

 *   A taxonomy vocabulary object.

 */

function hook_taxonomy_vocabulary_presave($vocabulary) {

  $vocabulary->foo = 'bar';

}

/**

 * Act on taxonomy vocabularies when inserted.

 *

 * Modules implementing this hook can act on the vocabulary object when saved

 * to the database.

 *

 * @param $vocabulary

 *   A taxonomy vocabulary object.

 */

function hook_taxonomy_vocabulary_insert($vocabulary) {

  if ($vocabulary->machine_name == 'my_vocabulary') {

    $vocabulary->weight = 100;

  }

}

/**

 * Act on taxonomy vocabularies when updated.

 *

 * Modules implementing this hook can act on the vocabulary object when updated.

 *

 * @param $vocabulary

 *   A taxonomy vocabulary object.

 */

function hook_taxonomy_vocabulary_update($vocabulary) {

  db_update('mytable')

    ->fields(array('foo' => $vocabulary->foo))

    ->condition('vid', $vocabulary->vid)

    ->execute();

}

/**

 * Respond to the deletion of taxonomy vocabularies.

 *

 * Modules implementing this hook can respond to the deletion of taxonomy

 * vocabularies from the database.

 *

 * @param $vocabulary

 *   A taxonomy vocabulary object.

 */

function hook_taxonomy_vocabulary_delete($vocabulary) {

  db_delete('mytable')

    ->condition('vid', $vocabulary->vid)

    ->execute();

}

/**

 * Act on taxonomy terms when loaded.

 *

 * Modules implementing this hook can act on the term objects returned by

 * taxonomy_term_load_multiple().

 *

 * For performance reasons, information to be added to term objects should be

 * loaded in a single query for all terms where possible.

 *

 * Since terms are stored and retrieved from cache during a page request, avoid

 * altering properties provided by the {taxonomy_term_data} table, since this

 * may affect the way results are loaded from cache in subsequent calls.

 *

 * @param $terms

 *   An array of term objects, indexed by tid.

 */

function hook_taxonomy_term_load($terms) {

  $result = db_select('mytable', 'm')

    ->fields('m', array('tid', 'foo'))

    ->condition('m.tid', array_keys($terms), 'IN')

    ->execute();

  foreach ($result as $record) {

    $terms[$record->tid]->foo = $record->foo;

  }

}

/**

 * Act on taxonomy terms before they are saved.

 *

 * Modules implementing this hook can act on the term object before it is

 * inserted or updated.

 *

 * @param $term

 *   A term object.

 */

function hook_taxonomy_term_presave($term) {

  $term->foo = 'bar';

}

/**

 * Act on taxonomy terms when inserted.

 *

 * Modules implementing this hook can act on the term object when saved to

 * the database.

 *

 * @param $term

 *   A taxonomy term object.

 */

function hook_taxonomy_term_insert($term) {

  db_insert('mytable')

    ->fields(array(

      'tid' => $term->tid,

      'foo' => $term->foo,

    ))

    ->execute();

}

/**

 * Act on taxonomy terms when updated.

 *

 * Modules implementing this hook can act on the term object when updated.

 *

 * @param $term

 *   A taxonomy term object.

 */

function hook_taxonomy_term_update($term) {

  db_update('mytable')

    ->fields(array('foo' => $term->foo))

    ->condition('tid', $term->tid)

    ->execute();

}

/**

 * Respond to the deletion of taxonomy terms.

 *

 * Modules implementing this hook can respond to the deletion of taxonomy

 * terms from the database.

 *

 * @param $term

 *   A taxonomy term object.

 */

function hook_taxonomy_term_delete($term) {

  db_delete('mytable')

    ->condition('tid', $term->tid)

    ->execute();

}

/**

 * Act on a taxonomy term that is being assembled before rendering.

 *

 * The module may add elements to $term->content prior to rendering. The

 * structure of $term->content is a renderable array as expected by

 * drupal_render().

 *

 * @param $term

 *   The term that is being assembled for rendering.

 * @param $view_mode

 *   The $view_mode parameter from taxonomy_term_view().

 * @param $langcode

 *   The language code used for rendering.

 *

 * @see hook_entity_view()

 */

function hook_taxonomy_term_view($term, $view_mode, $langcode) {

  $term->content['my_additional_field'] = array(

    '#markup' => $additional_field,

    '#weight' => 10,

    '#theme' => 'mymodule_my_additional_field',

  );

}

/**

 * Alter the results of taxonomy_term_view().

 *

 * This hook is called after the content has been assembled in a structured

 * array and may be used for doing processing which requires that the complete

 * taxonomy term content structure has been built.

 *

 * If the module wishes to act on the rendered HTML of the term rather than the

 * structured content array, it may use this hook to add a #post_render

 * callback. Alternatively, it could also implement

 * hook_preprocess_taxonomy_term(). See drupal_render() and theme()

 * documentation respectively for details.

 *

 * @param $build

 *   A renderable array representing the term.

 *

 * @see hook_entity_view_alter()

 */

function hook_taxonomy_term_view_alter(&$build) {

  if ($build['#view_mode'] == 'full' && isset($build['an_additional_field'])) {

    // Change its weight.

    $build['an_additional_field']['#weight'] = -10;

  }

  // Add a #post_render callback to act on the rendered HTML of the term.

  $build['#post_render'][] = 'my_module_node_post_render';

}

/**

 * @} End of "addtogroup hooks".

 */