virtue-toolkit / cmb / helpers / cmb_Meta_Box_ajax.php

cmb_Meta_Box_ajax.php in Virtue/Ascend/Pinnacle Toolkit 3.2, at cmb/helpers/cmb_Meta_Box_ajax.php

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1	<?php
2
3	/**
4	* CMB ajax methods
5	* (i.e. a lot of work to get oEmbeds to work with non-post objects)
6	*
7	* @since 0.9.5
8	*/
9	class cmb_Meta_Box_ajax {
10
11	// A single instance of this class.
12	public static $instance = null;
13	// Whether to hijack the oembed cache system
14	public static $hijack = false;
15	public static $object_id = 0;
16	public static $embed_args = array();
17	public static $object_type = 'post';
18
19	/**
20	* Creates or returns an instance of this class.
21	* @since 0.1.0
22	* @return cmb_Meta_Box_ajax A single instance of this class.
23	*/
24	public static function get() {
25	if ( self::$instance === null )
26	self::$instance = new self();
27
28	return self::$instance;
29	}
30
31	/**
32	* Handles our oEmbed ajax request
33	* @since 0.9.5
34	* @return object oEmbed embed code \| fallback \| error message
35	*/
36	public function oembed_handler() {
37
38	// verify our nonce
39	if ( ! ( isset( $_REQUEST['cmb_ajax_nonce'], $_REQUEST['oembed_url'] ) && wp_verify_nonce( $_REQUEST['cmb_ajax_nonce'], 'ajax_nonce' ) ) )
40	die();
41
42	// sanitize our search string
43	$oembed_string = sanitize_text_field( $_REQUEST['oembed_url'] );
44
45	// send back error if empty
46	if ( empty( $oembed_string ) )
47	self::send_result( '<p class="ui-state-error-text">'. __( 'Please Try Again', 'virtue-toolkit' ) .'</p>', false );
48
49	// Set width of embed
50	$embed_width = isset( $_REQUEST['oembed_width'] ) && intval( $_REQUEST['oembed_width'] ) < 640 ? intval( $_REQUEST['oembed_width'] ) : '640';
51
52	// set url
53	$oembed_url = esc_url( $oembed_string );
54	// set args
55	$embed_args = array( 'width' => $embed_width );
56
57	// Get embed code (or fallback link)
58	$html = self::get_oembed( $oembed_url, $_REQUEST['object_id'], array(
59	'object_type' => isset( $_REQUEST['object_type'] ) ? $_REQUEST['object_type'] : 'post',
60	'oembed_args' => $embed_args,
61	'field_id' => $_REQUEST['field_id'],
62	) );
63
64	self::send_result( $html );
65
66	}
67
68	/**
69	* Retrieves oEmbed from url/object ID
70	* @since 0.9.5
71	* @param string $url URL to retrieve oEmbed
72	* @param int $object_id Object ID
73	* @param array $args Arguments for method
74	* @return string html markup with embed or fallback
75	*/
76	public static function get_oembed( $url, $object_id, $args = array() ) {
77	global $wp_embed;
78
79	$oembed_url = esc_url( $url );
80
81	// Sanitize object_id
82	self::$object_id = is_numeric( $object_id ) ? absint( $object_id ) : sanitize_text_field( $object_id );
83
84	$args = wp_parse_args( $args, array(
85	'object_type' => 'post',
86	'oembed_args' => self::$embed_args,
87	'field_id' => false,
88	'cache_key' => false,
89	) );
90
91	self::$embed_args =& $args;
92
93	// set the post_ID so oEmbed won't fail
94	// wp-includes/class-wp-embed.php, WP_Embed::shortcode(), line 162
95	$wp_embed->post_ID = self::$object_id;
96
97	// Special scenario if NOT a post object
98	if ( isset( $args['object_type'] ) && $args['object_type'] != 'post' ) {
99
100	if ( 'options-page' == $args['object_type'] ) {
101	// bogus id to pass some numeric checks
102	// Issue with a VERY large WP install?
103	$wp_embed->post_ID = 1987645321;
104	// Use our own cache key to correspond to this field (vs one cache key per url)
105	$args['cache_key'] = $args['field_id'] .'_cache';
106	}
107	// Ok, we need to hijack the oembed cache system
108	self::$hijack = true;
109	self::$object_type = $args['object_type'];
110
111	// Gets ombed cache from our object's meta (vs postmeta)
112	add_filter( 'get_post_metadata', array( 'cmb_Meta_Box_ajax', 'hijack_oembed_cache_get' ), 10, 3 );
113	// Sets ombed cache in our object's meta (vs postmeta)
114	add_filter( 'update_post_metadata', array( 'cmb_Meta_Box_ajax', 'hijack_oembed_cache_set' ), 10, 4 );
115
116	}
117
118	$embed_args = '';
119	foreach ( $args['oembed_args'] as $key => $val ) {
120	$embed_args .= " $key=\"$val\"";
121	}
122
123	// ping WordPress for an embed
124	$check_embed = $wp_embed->run_shortcode( '[embed'. $embed_args .']'. $oembed_url .'[/embed]' );
125
126	// fallback that WordPress creates when no oEmbed was found
127	$fallback = $wp_embed->maybe_make_link( $oembed_url );
128
129	// Send back our embed
130	if ( $check_embed && $check_embed != $fallback )
131	return '<div class="embed_status">'. $check_embed .'<p class="cmb_remove_wrapper"><a href="#" class="cmb_remove_file_button" rel="'. $args['field_id'] .'">'. __( 'Remove Embed', 'virtue-toolkit' ) .'</a></p></div>';
132
133	// Otherwise, send back error info that no oEmbeds were found
134	return '<p class="ui-state-error-text">'. sprintf( __( 'No oEmbed Results Found for %s. View more info at', 'virtue-toolkit' ), $fallback ) .' <a href="http://codex.wordpress.org/Embeds" target="_blank">codex.wordpress.org/Embeds</a>.</p>';
135
136	}
137
138	/**
139	* Hijacks retrieving of cached oEmbed.
140	* Returns cached data from relevant object metadata (vs postmeta)
141	*
142	* @since 0.9.5
143	* @param boolean $check Whether to retrieve postmeta or override
144	* @param int $object_id Object ID
145	* @param string $meta_key Object metakey
146	* @return mixed Object's oEmbed cached data
147	*/
148	public static function hijack_oembed_cache_get( $check, $object_id, $meta_key ) {
149
150	if ( ! self::$hijack \|\| ( self::$object_id != $object_id && 1987645321 !== $object_id ) )
151	return $check;
152
153	// get cached data
154	$data = 'options-page' === self::$object_type
155	? cmb_Meta_Box::get_option( self::$object_id, self::$embed_args['cache_key'] )
156	: get_metadata( self::$object_type, self::$object_id, $meta_key, true );
157
158	return $data;
159	}
160
161	/**
162	* Hijacks saving of cached oEmbed.
163	* Saves cached data to relevant object metadata (vs postmeta)
164	*
165	* @since 0.9.5
166	* @param boolean $check Whether to continue setting postmeta
167	* @param int $object_id Object ID to get postmeta from
168	* @param string $meta_key Postmeta's key
169	* @param mixed $meta_value Value of the postmeta to be saved
170	* @return boolean Whether to continue setting
171	*/
172	public static function hijack_oembed_cache_set( $check, $object_id, $meta_key, $meta_value ) {
173	if ( ! self::$hijack \|\| ( self::$object_id != $object_id && 1987645321 !== $object_id ) )
174	return $check;
175
176	// Cache the result to our metadata
177	if ( 'options-page' === self::$object_type ) {
178	// Set the option
179	cmb_Meta_Box::update_option( self::$object_id, self::$embed_args['cache_key'], $meta_value, array( 'type' => 'oembed' ) );
180	// Save the option
181	cmb_Meta_Box::save_option( self::$object_id );
182	} else {
183	update_metadata( self::$object_type, self::$object_id, $meta_key, $meta_value );
184	}
185
186	// Anything other than `null` to cancel saving to postmeta
187	return true;
188	}
189
190	/**
191	* Helper to send json encoded response to ajax
192	* @since 0.9.5
193	* @param string $data Data to be shown via ajax
194	* @param boolean $success Success or fail
195	*/
196	public static function send_result( $data, $success = true ) {
197	$found = $success ? 'found' : 'not found';
198	// send back our encoded data
199	echo json_encode( array( 'result' => $data, 'id' => $found ) );
200	die();
201	}
202
203	}
204