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<?php |
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/** |
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* @package Polylang |
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*/ |
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|
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/** |
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* Abstract class to manage the copy and synchronization of metas |
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* |
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* @since 2.3 |
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*/ |
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abstract class PLL_Sync_Metas { |
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/** |
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* @var PLL_Model |
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*/ |
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public $model; |
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|
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/** |
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* Meta type. Typically 'post' or 'term'. |
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* |
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* @var string |
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*/ |
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protected $meta_type; |
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|
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/** |
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* Stores the previous values when updating a meta. |
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* |
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* @var array |
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*/ |
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protected $prev_value; |
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|
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/** |
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* Stores the metas to synchronize before deleting them. |
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* |
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* @var array |
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*/ |
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protected $to_copy; |
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|
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/** |
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* Constructor |
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* |
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* @since 2.3 |
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* |
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* @param object $polylang |
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*/ |
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public function __construct( &$polylang ) { |
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$this->model = &$polylang->model; |
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|
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add_filter( "add_{$this->meta_type}_metadata", array( $this, 'can_synchronize_metadata' ), 1, 3 ); |
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add_filter( "update_{$this->meta_type}_metadata", array( $this, 'can_synchronize_metadata' ), 1, 3 ); |
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add_filter( "delete_{$this->meta_type}_metadata", array( $this, 'can_synchronize_metadata' ), 1, 3 ); |
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|
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$this->add_all_meta_actions(); |
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|
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add_action( "pll_save_{$this->meta_type}", array( $this, 'save_object' ), 10, 3 ); |
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} |
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|
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/** |
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* Removes "added_{$this->meta_type}_meta" action |
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* |
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* @since 2.3 |
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* |
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* @return void |
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*/ |
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protected function remove_add_meta_action() { |
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remove_action( "added_{$this->meta_type}_meta", array( $this, 'add_meta' ), 10, 4 ); |
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} |
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|
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/** |
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* Removes all meta synchronization actions and filters |
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* |
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* @since 2.3 |
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* |
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* @return void |
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*/ |
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protected function remove_all_meta_actions() { |
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$this->remove_add_meta_action(); |
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|
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remove_filter( "update_{$this->meta_type}_metadata", array( $this, 'update_metadata' ), 999, 5 ); |
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remove_action( "update_{$this->meta_type}_meta", array( $this, 'update_meta' ), 10, 4 ); |
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|
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remove_action( "delete_{$this->meta_type}_meta", array( $this, 'store_metas_to_sync' ), 10, 2 ); |
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remove_action( "deleted_{$this->meta_type}_meta", array( $this, 'delete_meta' ), 10, 4 ); |
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} |
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|
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/** |
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* Adds "added_{$this->meta_type}_meta" action |
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* |
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* @since 2.3 |
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* |
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* @return void |
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*/ |
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protected function restore_add_meta_action() { |
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add_action( "added_{$this->meta_type}_meta", array( $this, 'add_meta' ), 10, 4 ); |
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} |
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|
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/** |
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* Adds meta synchronization actions and filters |
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* |
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* @since 2.3 |
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* |
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* @return void |
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*/ |
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protected function add_all_meta_actions() { |
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$this->restore_add_meta_action(); |
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|
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add_filter( "update_{$this->meta_type}_metadata", array( $this, 'update_metadata' ), 999, 5 ); // Very late in case a filter prevents the meta to be updated |
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add_action( "update_{$this->meta_type}_meta", array( $this, 'update_meta' ), 10, 4 ); |
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|
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add_action( "delete_{$this->meta_type}_meta", array( $this, 'store_metas_to_sync' ), 10, 2 ); |
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add_action( "deleted_{$this->meta_type}_meta", array( $this, 'delete_meta' ), 10, 4 ); |
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} |
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|
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/** |
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* Maybe modify ("translate") a meta value when it is copied or synchronized |
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* |
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* @since 2.3 |
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* |
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* @param mixed $value Meta value |
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* @param string $key Meta key |
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* @param int $from Id of the source |
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* @param int $to Id of the target |
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* @param string $lang Language of target |
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* @return mixed |
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*/ |
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protected function maybe_translate_value( $value, $key, $from, $to, $lang ) { |
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/** |
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* Filter a meta value before is copied or synchronized |
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* |
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* @since 2.3 |
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* |
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* @param mixed $value Meta value |
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* @param string $key Meta key |
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* @param string $lang Language of target |
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* @param int $from Id of the source |
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* @param int $to Id of the target |
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*/ |
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return apply_filters( "pll_translate_{$this->meta_type}_meta", maybe_unserialize( $value ), $key, $lang, $from, $to ); |
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} |
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|
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/** |
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* Get the custom fields to copy or synchronize. |
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* |
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* @since 2.3 |
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* |
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* @param int $from Id of the post from which we copy informations. |
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* @param int $to Id of the post to which we paste informations. |
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* @param string $lang Language slug. |
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* @param bool $sync True if it is synchronization, false if it is a copy. |
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* @return string[] List of meta keys. |
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*/ |
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protected function get_metas_to_copy( $from, $to, $lang, $sync = false ) { |
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/** |
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* Filters the custom fields to copy or synchronize. |
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* |
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* @since 0.6 |
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* @since 1.9.2 The `$from`, `$to`, `$lang` parameters were added. |
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* |
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* @param string[] $keys List of custom fields names. |
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* @param bool $sync True if it is synchronization, false if it is a copy. |
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* @param int $from Id of the post from which we copy informations. |
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* @param int $to Id of the post to which we paste informations. |
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* @param string $lang Language slug. |
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*/ |
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return array_unique( apply_filters( "pll_copy_{$this->meta_type}_metas", array(), $sync, $from, $to, $lang ) ); |
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} |
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|
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/** |
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* Disallow modifying synchronized meta if the current user can not modify translations |
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* |
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* @since 2.6 |
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* |
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* @param null|bool $check Whether to allow adding/updating/deleting metadata. |
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* @param int $id Object ID. |
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* @param string $meta_key Meta key. |
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* @return null|bool |
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*/ |
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public function can_synchronize_metadata( $check, $id, $meta_key ) { |
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if ( ! $this->model->{$this->meta_type}->current_user_can_synchronize( $id ) ) { |
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$tr_ids = $this->model->{$this->meta_type}->get_translations( $id ); |
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|
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foreach ( $tr_ids as $lang => $tr_id ) { |
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if ( $tr_id != $id ) { |
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$to_copy = $this->get_metas_to_copy( $id, $tr_id, $lang, true ); |
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if ( in_array( $meta_key, $to_copy ) ) { |
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return false; |
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} |
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} |
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} |
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} |
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return $check; |
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} |
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|
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/** |
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* Synchronize added metas across translations |
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* |
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* @since 2.3 |
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* |
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* @param int $mid Meta id. |
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* @param int $id Object ID. |
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* @param string $meta_key Meta key. |
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* @param mixed $meta_value Meta value. Must be serializable if non-scalar. |
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* @return void |
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*/ |
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public function add_meta( $mid, $id, $meta_key, $meta_value ) { |
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static $avoid_recursion = false; |
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|
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if ( ! $avoid_recursion ) { |
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$avoid_recursion = true; |
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$tr_ids = $this->model->{$this->meta_type}->get_translations( $id ); |
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|
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foreach ( $tr_ids as $lang => $tr_id ) { |
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if ( $tr_id != $id ) { |
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$to_copy = $this->get_metas_to_copy( $id, $tr_id, $lang, true ); |
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if ( in_array( $meta_key, $to_copy ) ) { |
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$meta_value = $this->maybe_translate_value( $meta_value, $meta_key, $id, $tr_id, $lang ); |
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add_metadata( $this->meta_type, $tr_id, wp_slash( $meta_key ), is_object( $meta_value ) ? $meta_value : wp_slash( $meta_value ) ); |
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} |
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} |
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} |
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|
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$avoid_recursion = false; |
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} |
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} |
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|
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/** |
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* Stores the previous value when updating metas |
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* |
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* @since 2.3 |
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* |
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* @param null|bool $r Not used |
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* @param int $id Object ID. |
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* @param string $meta_key Meta key. |
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* @param mixed $meta_value Meta value. Must be serializable if non-scalar. |
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* @param mixed $prev_value If specified, only update existing metadata entries with the specified value. |
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* @return null|bool Unchanged |
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*/ |
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public function update_metadata( $r, $id, $meta_key, $meta_value, $prev_value ) { |
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if ( null === $r ) { |
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$hash = md5( "$id|$meta_key|" . maybe_serialize( $meta_value ) ); |
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$this->prev_value[ $hash ] = $prev_value; |
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} |
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return $r; |
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} |
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|
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/** |
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* Synchronize updated metas across translations |
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* |
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* @since 2.3 |
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* |
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* @param int $mid Meta id. |
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* @param int $id Object ID. |
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* @param string $meta_key Meta key. |
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* @param mixed $meta_value Meta value. Must be serializable if non-scalar. |
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* @return void |
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*/ |
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public function update_meta( $mid, $id, $meta_key, $meta_value ) { |
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static $avoid_recursion = false; |
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|
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if ( ! $avoid_recursion ) { |
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$avoid_recursion = true; |
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$hash = md5( "$id|$meta_key|" . maybe_serialize( $meta_value ) ); |
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|
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$prev_meta = get_metadata_by_mid( $this->meta_type, $mid ); |
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|
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if ( $prev_meta ) { |
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$this->remove_add_meta_action(); // We don't want to sync back the new metas |
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$tr_ids = $this->model->{$this->meta_type}->get_translations( $id ); |
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|
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foreach ( $tr_ids as $lang => $tr_id ) { |
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if ( $tr_id != $id && in_array( $meta_key, $this->get_metas_to_copy( $id, $tr_id, $lang, true ) ) ) { |
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if ( empty( $this->prev_value[ $hash ] ) || $this->prev_value[ $hash ] === $prev_meta->meta_value ) { |
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$prev_value = $this->maybe_translate_value( $prev_meta->meta_value, $meta_key, $id, $tr_id, $lang ); |
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$meta_value = $this->maybe_translate_value( $meta_value, $meta_key, $id, $tr_id, $lang ); |
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update_metadata( $this->meta_type, $tr_id, wp_slash( $meta_key ), is_object( $meta_value ) ? $meta_value : wp_slash( $meta_value ), $prev_value ); |
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} |
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} |
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} |
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$this->restore_add_meta_action(); |
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} |
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|
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unset( $this->prev_value[ $hash ] ); |
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$avoid_recursion = false; |
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} |
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} |
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|
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/** |
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* Store metas to synchronize before deleting them. |
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* |
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* @since 2.3 |
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* |
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* @param int[] $mids Not used. |
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* @param int $id Object ID. |
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* @return void |
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*/ |
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public function store_metas_to_sync( $mids, $id ) { |
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$tr_ids = $this->model->{$this->meta_type}->get_translations( $id ); |
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|
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foreach ( $tr_ids as $lang => $tr_id ) { |
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$this->to_copy[ $id ][ $tr_id ] = $this->get_metas_to_copy( $id, $tr_id, $lang, true ); |
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} |
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} |
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|
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/** |
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* Synchronizes deleted meta across translations. |
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* |
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* @since 2.3 |
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* |
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* @param int[] $mids Not used. |
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* @param int $id Object ID. |
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* @param string $key Meta key. |
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* @param mixed $value Meta value. |
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* @return void |
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*/ |
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public function delete_meta( $mids, $id, $key, $value ) { |
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static $avoid_recursion = false; |
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|
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if ( ! $avoid_recursion ) { |
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$avoid_recursion = true; |
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|
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$tr_ids = $this->model->{$this->meta_type}->get_translations( $id ); |
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|
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foreach ( $tr_ids as $lang => $tr_id ) { |
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if ( $tr_id != $id ) { |
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if ( in_array( $key, $this->to_copy[ $id ][ $tr_id ] ) ) { |
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if ( '' !== $value && null !== $value && false !== $value ) { // Same test as WP |
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$value = $this->maybe_translate_value( $value, $key, $id, $tr_id, $lang ); |
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} |
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delete_metadata( $this->meta_type, $tr_id, wp_slash( $key ), is_object( $value ) ? $value : wp_slash( $value ) ); |
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} |
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} |
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} |
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} |
| 333 |
|
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$avoid_recursion = false; |
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} |
| 336 |
|
| 337 |
/** |
| 338 |
* Copy or synchronize metas |
| 339 |
* |
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* @since 2.3 |
| 341 |
* |
| 342 |
* @param int $from Id of the source object |
| 343 |
* @param int $to Id of the target object |
| 344 |
* @param string $lang Language code of the target object |
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* @param bool $sync Optional, defaults to true. True if it is synchronization, false if it is a copy |
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* @return void |
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*/ |
| 348 |
public function copy( $from, $to, $lang, $sync = false ) { |
| 349 |
$this->remove_all_meta_actions(); |
| 350 |
|
| 351 |
remove_action( "delete_{$this->meta_type}_meta", array( $this, 'store_metas_to_sync' ), 10, 2 ); |
| 352 |
remove_action( "deleted_{$this->meta_type}_meta", array( $this, 'delete_meta' ), 10, 4 ); |
| 353 |
|
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$to_copy = $this->get_metas_to_copy( $from, $to, $lang, $sync ); |
| 355 |
$metas = get_metadata( $this->meta_type, $from ); |
| 356 |
$tr_metas = get_metadata( $this->meta_type, $to ); |
| 357 |
|
| 358 |
foreach ( $to_copy as $key ) { |
| 359 |
if ( empty( $metas[ $key ] ) ) { |
| 360 |
if ( ! empty( $tr_metas[ $key ] ) ) { |
| 361 |
// If the meta key is not present in the source object, delete all values |
| 362 |
delete_metadata( $this->meta_type, $to, wp_slash( $key ) ); |
| 363 |
} |
| 364 |
} else { |
| 365 |
if ( ! empty( $tr_metas[ $key ] ) && 1 === count( $metas[ $key ] ) && 1 === count( $tr_metas[ $key ] ) ) { |
| 366 |
// One custom field to update |
| 367 |
$value = reset( $metas[ $key ] ); |
| 368 |
$value = maybe_unserialize( $value ); |
| 369 |
$to_value = $this->maybe_translate_value( $value, $key, $from, $to, $lang ); |
| 370 |
update_metadata( $this->meta_type, $to, wp_slash( $key ), is_object( $to_value ) ? $to_value : wp_slash( $to_value ) ); |
| 371 |
} else { |
| 372 |
// Multiple custom fields, either in the source or the target |
| 373 |
if ( ! empty( $tr_metas[ $key ] ) ) { |
| 374 |
// The synchronization of multiple values custom fields is easier if we delete all metas first |
| 375 |
delete_metadata( $this->meta_type, $to, wp_slash( $key ) ); |
| 376 |
} |
| 377 |
|
| 378 |
foreach ( $metas[ $key ] as $value ) { |
| 379 |
$value = maybe_unserialize( $value ); |
| 380 |
$to_value = $this->maybe_translate_value( $value, $key, $from, $to, $lang ); |
| 381 |
add_metadata( $this->meta_type, $to, wp_slash( $key ), is_object( $to_value ) ? $to_value : wp_slash( $to_value ) ); |
| 382 |
} |
| 383 |
} |
| 384 |
} |
| 385 |
} |
| 386 |
|
| 387 |
$this->add_all_meta_actions(); |
| 388 |
} |
| 389 |
|
| 390 |
/** |
| 391 |
* If synchronized custom fields were previously not synchronized, it is expected |
| 392 |
* that saving a post (or term) will synchronize them. |
| 393 |
* |
| 394 |
* @since 2.3 |
| 395 |
* |
| 396 |
* @param int $object_id Id of the object being saved. |
| 397 |
* @param object $obj Not used. |
| 398 |
* @param int[] $translations The list of translations object ids. |
| 399 |
* @return void |
| 400 |
*/ |
| 401 |
public function save_object( $object_id, $obj, $translations ) { |
| 402 |
foreach ( $translations as $tr_lang => $tr_id ) { |
| 403 |
if ( $tr_id != $object_id ) { |
| 404 |
$this->copy( $object_id, $tr_id, $tr_lang, true ); |
| 405 |
} |
| 406 |
} |
| 407 |
} |
| 408 |
} |
| 409 |
|
