Viewing file:  admin-filters-media.php (6.06 KB) -rw-r--r--
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<?php
/**
* Manages filters and actions related to media on admin side
* Capability to edit / create media is checked before loading this class
*
* @since 1.2
*/
class PLL_Admin_Filters_Media extends PLL_Admin_Filters_Post_Base {
/**
* Constructor: setups filters and actions
*
* @since 1.2
*
* @param object $polylang
*/
public function __construct( &$polylang ) {
parent::__construct( $polylang );
// Adds the language field and translations tables in the 'Edit Media' panel
add_filter( 'attachment_fields_to_edit', array( $this, 'attachment_fields_to_edit' ), 10, 2 );
// Adds actions related to languages when creating, saving or deleting media
add_action( 'add_attachment', array( $this, 'set_default_language' ) );
add_filter( 'attachment_fields_to_save', array( $this, 'save_media' ), 10, 2 );
add_filter( 'wp_delete_file', array( $this, 'wp_delete_file' ) );
// Creates a media translation
if ( isset( $_GET['action'], $_GET['new_lang'], $_GET['from_media'] ) && 'translate_media' === $_GET['action'] ) {
add_action( 'admin_init', array( $this, 'translate_media' ) );
}
}
/**
* Adds the language field and translations tables in the 'Edit Media' panel
* Needs WP 3.5+
*
* @since 0.9
*
* @param array $fields list of form fields
* @param object $post
* @return array modified list of form fields
*/
public function attachment_fields_to_edit( $fields, $post ) {
if ( 'post.php' == $GLOBALS['pagenow'] ) {
return $fields; // Don't add anything on edit media panel for WP 3.5+ since we have the metabox
}
$post_id = $post->ID;
$lang = $this->model->post->get_language( $post_id );
$dropdown = new PLL_Walker_Dropdown();
$fields['language'] = array(
'label' => __( 'Language', 'polylang' ),
'input' => 'html',
'html' => $dropdown->walk( $this->model->get_languages_list(), array(
'name' => sprintf( 'attachments[%d][language]', $post_id ),
'class' => 'media_lang_choice',
'selected' => $lang ? $lang->slug : '',
) ),
);
return $fields;
}
/**
* Creates a media translation
*
* @since 1.8
*
* @param int $post_id
* @param string|object $lang
* @return int id of the translated media
*/
public function create_media_translation( $post_id, $lang ) {
$post = get_post( $post_id );
if ( empty( $post ) ) {
return $post;
}
$lang = $this->model->get_language( $lang ); // Make sure we get a valid language slug
// Create a new attachment ( translate attachment parent if exists )
$post->ID = null; // Will force the creation
$post->post_parent = ( $post->post_parent && $tr_parent = $this->model->post->get_translation( $post->post_parent, $lang->slug ) ) ? $tr_parent : 0;
$post->tax_input = array( 'language' => array( $lang->slug ) ); // Assigns the language
$tr_id = wp_insert_attachment( $post );
// Copy metadata, attached file and alternative text
foreach ( array( '_wp_attachment_metadata', '_wp_attached_file', '_wp_attachment_image_alt' ) as $key ) {
if ( $meta = get_post_meta( $post_id, $key , true ) ) {
add_post_meta( $tr_id, $key, $meta );
}
}
$this->model->post->set_language( $tr_id, $lang );
$translations = $this->model->post->get_translations( $post_id );
if ( ! $translations && $src_lang = $this->model->post->get_language( $post_id ) ) {
$translations[ $src_lang->slug ] = $post_id;
}
$translations[ $lang->slug ] = $tr_id;
$this->model->post->save_translations( $tr_id, $translations );
/**
* Fires after a media translation is created
*
* @since 1.6.4
*
* @param int $post_id post id of the source media
* @param int $tr_id post id of the new media translation
* @param string $slug language code of the new translation
*/
do_action( 'pll_translate_media', $post_id, $tr_id, $lang->slug );
return $tr_id;
}
/**
* Creates a media translation
*
* @since 0.9
*/
public function translate_media() {
// Security check
check_admin_referer( 'translate_media' );
$post_id = (int) $_GET['from_media'];
// Bails if the translations already exists
// See https://wordpress.org/support/topic/edit-translation-in-media-attachments?#post-7322303
// Or if the source media does not exist
if ( $this->model->post->get_translation( $post_id, $_GET['new_lang'] ) || ! get_post( $post_id ) ) {
wp_safe_redirect( wp_get_referer() );
exit;
}
$tr_id = $this->create_media_translation( $post_id, $_GET['new_lang'] );
wp_safe_redirect( admin_url( sprintf( 'post.php?post=%d&action=edit', $tr_id ) ) ); // WP 3.5+
exit;
}
/**
* Called when a media is saved
* Saves language and translations
*
* @since 0.9
*
* @param array $post
* @param array $attachment
* @return array unmodified $post
*/
public function save_media( $post, $attachment ) {
// Language is filled in attachment by the function applying the filter 'attachment_fields_to_save'
// All security checks have been done by functions applying this filter
if ( ! empty( $attachment['language'] ) ) {
$this->model->post->set_language( $post['ID'], $attachment['language'] );
}
if ( isset( $_POST['media_tr_lang'] ) ) {
$this->save_translations( $post['ID'], $_POST['media_tr_lang'] );
}
return $post;
}
/**
* Prevents WP deleting files when there are still media using them
* Thanks to Bruno "Aesqe" Babic and its plugin file gallery in which I took all the ideas for this function
*
* @since 0.9
*
* @param string $file
* @return string unmodified $file
*/
public function wp_delete_file( $file ) {
global $wpdb;
$uploadpath = wp_upload_dir();
$ids = $wpdb->get_col( $wpdb->prepare( "
SELECT post_id FROM $wpdb->postmeta
WHERE meta_key = '_wp_attached_file' AND meta_value = '%s'",
substr_replace( $file, '', 0, strlen( trailingslashit( $uploadpath['basedir'] ) ) )
) );
if ( ! empty( $ids ) ) {
// Regenerate intermediate sizes if it's an image ( since we could not prevent WP deleting them before )
wp_update_attachment_metadata( $ids[0], wp_generate_attachment_metadata( $ids[0], $file ) );
return ''; // Prevent deleting the main file
}
return $file;
}
}
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