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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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* A class to manage copy and synchronization of post metas. |
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* |
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* @since 2.3 |
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*/ |
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class PLL_Sync_Post_Metas extends PLL_Sync_Metas { |
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/** |
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* Stores the plugin options. |
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* |
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* @var array |
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*/ |
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public $options; |
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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 $polylang The Polylang object. |
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*/ |
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public function __construct( &$polylang ) { |
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$this->meta_type = 'post'; |
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|
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parent::__construct( $polylang ); |
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|
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$this->options = &$polylang->options; |
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|
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add_filter( 'pll_translate_post_meta', array( $this, 'translate_thumbnail_id' ), 10, 3 ); |
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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 information. |
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* @param int $to Id of the post to which we paste information. |
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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, $sync = false ) { |
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$keys = array(); |
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|
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// Get public meta keys ( including from translated post in case we just deleted a custom field ). |
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if ( ! $sync || in_array( 'post_meta', $this->options['sync'] ) ) { |
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$from_keys = (array) get_post_custom_keys( $from ); |
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$to_keys = (array) get_post_custom_keys( $to ); |
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|
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$keys = array_unique( array_merge( $from_keys, $to_keys ) ); |
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foreach ( $keys as $k => $meta_key ) { |
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if ( is_protected_meta( $meta_key ) ) { |
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unset( $keys[ $k ] ); |
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} |
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} |
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} |
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|
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// Add page template and featured image. |
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foreach ( array( '_wp_page_template', '_thumbnail_id' ) as $meta ) { |
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if ( ! $sync || in_array( $meta, $this->options['sync'] ) ) { |
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$keys[] = $meta; |
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} |
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} |
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|
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if ( $this->options['media_support'] ) { |
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$keys[] = '_wp_attached_file'; |
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$keys[] = '_wp_attachment_metadata'; |
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$keys[] = '_wp_attachment_backup_sizes'; |
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$keys[] = '_wp_attachment_is_custom_header'; // Random header image. |
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} |
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|
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/** This filter is documented in modules/sync/sync-metas.php */ |
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return array_unique( apply_filters( 'pll_copy_post_metas', $keys, $sync, $from, $to, $lang ) ); |
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} |
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|
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/** |
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* Translates the thumbnail id. |
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* |
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* @since 2.3 |
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* |
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* @param int $value Thumbnail id. |
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* @param string $key Meta key. |
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* @param string $lang Language code. |
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* @return int |
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*/ |
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public function translate_thumbnail_id( $value, $key, $lang ) { |
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return ( $this->options['media_support'] && '_thumbnail_id' === $key && $to_value = $this->model->post->get_translation( $value, $lang ) ) ? $to_value : $value; |
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} |
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} |
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|
