polylang / admin / admin-filters-media.php

admin-filters-media.php in Polylang 2.0.3, at admin/admin-filters-media.php

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1	<?php
2
3	/**
4	* Manages filters and actions related to media on admin side
5	* Capability to edit / create media is checked before loading this class
6	*
7	* @since 1.2
8	*/
9	class PLL_Admin_Filters_Media extends PLL_Admin_Filters_Post_Base {
10	/**
11	* Constructor: setups filters and actions
12	*
13	* @since 1.2
14	*
15	* @param object $polylang
16	*/
17	public function __construct( &$polylang ) {
18	parent::__construct( $polylang );
19
20	// Adds the language field and translations tables in the 'Edit Media' panel
21	add_filter( 'attachment_fields_to_edit', array( $this, 'attachment_fields_to_edit' ), 10, 2 );
22
23	// Adds actions related to languages when creating, saving or deleting media
24	add_action( 'add_attachment', array( $this, 'set_default_language' ) );
25	add_filter( 'attachment_fields_to_save', array( $this, 'save_media' ), 10, 2 );
26	add_filter( 'wp_delete_file', array( $this, 'wp_delete_file' ) );
27
28	// Creates a media translation
29	if ( isset( $_GET['action'], $_GET['new_lang'], $_GET['from_media'] ) && 'translate_media' === $_GET['action'] ) {
30	add_action( 'admin_init', array( $this, 'translate_media' ) );
31	}
32	}
33
34	/**
35	* Adds the language field and translations tables in the 'Edit Media' panel
36	* Needs WP 3.5+
37	*
38	* @since 0.9
39	*
40	* @param array $fields list of form fields
41	* @param object $post
42	* @return array modified list of form fields
43	*/
44	public function attachment_fields_to_edit( $fields, $post ) {
45	if ( 'post.php' == $GLOBALS['pagenow'] ) {
46	return $fields; // Don't add anything on edit media panel for WP 3.5+ since we have the metabox
47	}
48
49	$post_id = $post->ID;
50	$lang = $this->model->post->get_language( $post_id );
51
52	$dropdown = new PLL_Walker_Dropdown();
53	$fields['language'] = array(
54	'label' => __( 'Language', 'polylang' ),
55	'input' => 'html',
56	'html' => $dropdown->walk( $this->model->get_languages_list(), array(
57	'name' => sprintf( 'attachments[%d][language]', $post_id ),
58	'class' => 'media_lang_choice',
59	'selected' => $lang ? $lang->slug : '',
60	) ),
61	);
62
63	return $fields;
64	}
65
66	/**
67	* Creates a media translation
68	*
69	* @since 1.8
70	*
71	* @param int $post_id
72	* @param string\|object $lang
73	* @return int id of the translated media
74	*/
75	public function create_media_translation( $post_id, $lang ) {
76	$post = get_post( $post_id );
77	$lang = $this->model->get_language( $lang ); // Make sure we get a valid language slug
78
79	// Create a new attachment ( translate attachment parent if exists )
80	$post->ID = null; // Will force the creation
81	$post->post_parent = ( $post->post_parent && $tr_parent = $this->model->post->get_translation( $post->post_parent, $lang->slug ) ) ? $tr_parent : 0;
82	$post->tax_input = array( 'language' => array( $lang->slug ) ); // Assigns the language
83	$tr_id = wp_insert_attachment( $post );
84
85	// Copy metadata, attached file and alternative text
86	foreach ( array( '_wp_attachment_metadata', '_wp_attached_file', '_wp_attachment_image_alt' ) as $key ) {
87	if ( $meta = get_post_meta( $post_id, $key , true ) ) {
88	add_post_meta( $tr_id, $key, $meta );
89	}
90	}
91
92	$this->model->post->set_language( $tr_id, $lang );
93
94	$translations = $this->model->post->get_translations( $post_id );
95	if ( ! $translations && $src_lang = $this->model->post->get_language( $post_id ) ) {
96	$translations[ $src_lang->slug ] = $post_id;
97	}
98
99	$translations[ $lang->slug ] = $tr_id;
100	$this->model->post->save_translations( $tr_id, $translations );
101
102	/**
103	* Fires after a media translation is created
104	*
105	* @since 1.6.4
106	*
107	* @param int $post_id post id of the source media
108	* @param int $tr_id post id of the new media translation
109	* @param string $slug language code of the new translation
110	*/
111	do_action( 'pll_translate_media', $post_id, $tr_id, $lang->slug );
112	return $tr_id;
113	}
114
115	/**
116	* Creates a media translation
117	*
118	* @since 0.9
119	*/
120	public function translate_media() {
121	// Security check
122	check_admin_referer( 'translate_media' );
123	$post_id = (int) $_GET['from_media'];
124
125	// Bails if the translations already exists
126	// See https://wordpress.org/support/topic/edit-translation-in-media-attachments?#post-7322303
127	// Or if the source media does not exist
128	if ( $this->model->post->get_translation( $post_id, $_GET['new_lang'] ) \|\| ! get_post( $post_id ) ) {
129	wp_safe_redirect( wp_get_referer() );
130	exit;
131	}
132
133	$tr_id = $this->create_media_translation( $post_id, $_GET['new_lang'] );
134	wp_safe_redirect( admin_url( sprintf( 'post.php?post=%d&action=edit', $tr_id ) ) ); // WP 3.5+
135	exit;
136	}
137
138	/**
139	* Called when a media is saved
140	* Saves language and translations
141	*
142	* @since 0.9
143	*
144	* @param array $post
145	* @param array $attachment
146	* @return array unmodified $post
147	*/
148	public function save_media( $post, $attachment ) {
149	// Language is filled in attachment by the function applying the filter 'attachment_fields_to_save'
150	// All security checks have been done by functions applying this filter
151	if ( ! empty( $attachment['language'] ) ) {
152	$this->model->post->set_language( $post['ID'], $attachment['language'] );
153	}
154
155	if ( isset( $_POST['media_tr_lang'] ) ) {
156	$this->save_translations( $post['ID'], $_POST['media_tr_lang'] );
157	}
158
159	return $post;
160	}
161
162	/**
163	* Prevents WP deleting files when there are still media using them
164	* Thanks to Bruno "Aesqe" Babic and its plugin file gallery in which I took all the ideas for this function
165	*
166	* @since 0.9
167	*
168	* @param string $file
169	* @return string unmodified $file
170	*/
171	public function wp_delete_file( $file ) {
172	global $wpdb;
173
174	$uploadpath = wp_upload_dir();
175
176	$ids = $wpdb->get_col( $wpdb->prepare( "
177	SELECT post_id FROM $wpdb->postmeta
178	WHERE meta_key = '_wp_attached_file' AND meta_value = '%s'",
179	substr_replace( $file, '', 0, strlen( trailingslashit( $uploadpath['basedir'] ) ) )
180	) );
181
182	if ( ! empty( $ids ) ) {
183	// Regenerate intermediate sizes if it's an image ( since we could not prevent WP deleting them before )
184	wp_update_attachment_metadata( $ids[0], wp_generate_attachment_metadata( $ids[0], $file ) );
185	return ''; // Prevent deleting the main file
186	}
187
188	return $file;
189	}
190	}
191