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<?php
/**
* CMBRE2 ajax methods
* (i.e. a lot of work to get oEmbeds to work with non-post objects)
*
* @since 0.9.5
*
* @category WordPress_Plugin
* @package CMBRE2
* @author WebDevStudios
* @license GPL-2.0+
*/
if ( ! defined( 'WPINC' ) ) exit;
class CMBRE2_Ajax {
// Whether to hijack the oembed cache system
protected $hijack = false;
protected $object_id = 0;
protected $embed_args = array();
protected $object_type = 'post';
protected $ajax_update = false;
/**
* Handles our oEmbed ajax request
* @since 0.9.5
* @return object oEmbed embed code | fallback | error message
*/
public function oembed_handler() {
// Verify our nonce
if ( ! ( isset( $_REQUEST['cmbre2_ajax_nonce'], $_REQUEST['oembed_url'] ) && wp_verify_nonce( $_REQUEST['cmbre2_ajax_nonce'], 'ajax_nonce' ) ) ) {
die();
}
// Sanitize our search string
$oembed_string = sanitize_text_field( $_REQUEST['oembed_url'] );
// Send back error if empty
if ( empty( $oembed_string ) ) {
wp_send_json_error( '<p class="ui-state-error-text">' . 'Please Try Again' . '</p>' );
}
// Set width of embed
$embed_width = isset( $_REQUEST['oembed_width'] ) && intval( $_REQUEST['oembed_width'] ) < 640 ? intval( $_REQUEST['oembed_width'] ) : '640';
// Set url
$oembed_url = esc_url( $oembed_string );
// Set args
$embed_args = array( 'width' => $embed_width );
$this->ajax_update = true;
// Get embed code (or fallback link)
$html = $this->get_oembed( array(
'url' => $oembed_url,
'object_id' => $_REQUEST['object_id'],
'object_type' => isset( $_REQUEST['object_type'] ) ? $_REQUEST['object_type'] : 'post',
'oembed_args' => $embed_args,
'field_id' => $_REQUEST['field_id'],
) );
wp_send_json_success( $html );
}
/**
* Retrieves oEmbed from url/object ID
* @since 0.9.5
* @param array $args Arguments for method
* @return string html markup with embed or fallback
*/
public function get_oembed( $args ) {
global $wp_embed;
$oembed_url = esc_url( $args['url'] );
// Sanitize object_id
$this->object_id = is_numeric( $args['object_id'] ) ? absint( $args['object_id'] ) : sanitize_text_field( $args['object_id'] );
$args = wp_parse_args( $args, array(
'object_type' => 'post',
'oembed_args' => $this->embed_args,
'field_id' => false,
'cache_key' => false,
) );
$this->embed_args =& $args;
/**
* Set the post_ID so oEmbed won't fail
* wp-includes/class-wp-embed.php, WP_Embed::shortcode()
*/
$wp_embed->post_ID = $this->object_id;
// Special scenario if NOT a post object
if ( isset( $args['object_type'] ) && 'post' != $args['object_type'] ) {
if ( 'options-page' == $args['object_type'] ) {
// Bogus id to pass some numeric checks. Issue with a VERY large WP install?
$wp_embed->post_ID = 1987645321;
// Use our own cache key to correspond to this field (vs one cache key per url)
$args['cache_key'] = $args['field_id'] . '_cache';
}
// Ok, we need to hijack the oembed cache system
$this->hijack = true;
$this->object_type = $args['object_type'];
// Gets ombed cache from our object's meta (vs postmeta)
add_filter( 'get_post_metadata', array( $this, 'hijack_oembed_cache_get' ), 10, 3 );
// Sets ombed cache in our object's meta (vs postmeta)
add_filter( 'update_post_metadata', array( $this, 'hijack_oembed_cache_set' ), 10, 4 );
}
$embed_args = '';
foreach ( $args['oembed_args'] as $key => $val ) {
$embed_args .= " $key=\"$val\"";
}
// Ping WordPress for an embed
$check_embed = $wp_embed->run_shortcode( '[embed' . $embed_args . ']' . $oembed_url . '[/embed]' );
// Fallback that WordPress creates when no oEmbed was found
$fallback = $wp_embed->maybe_make_link( $oembed_url );
// Send back our embed
if ( $check_embed && $check_embed != $fallback ) {
return '<div class="embed-status">' . $check_embed . '<p class="cmbre2-remove-wrapper"><a href="#" class="cmbre2-remove-file-button" rel="' . $args['field_id'] . '">' . 'Remove Embed' . '</a></p></div>';
}
// Otherwise, send back error info that no oEmbeds were found
return '<p class="ui-state-error-text">' . sprintf( 'No oEmbed Results Found for %s. View more info at', $fallback ) . ' <a href="http://codex.wordpress.org/Embeds" target="_blank">codex.wordpress.org/Embeds</a>.</p>';
}
/**
* Hijacks retrieving of cached oEmbed.
* Returns cached data from relevant object metadata (vs postmeta)
*
* @since 0.9.5
* @param boolean $check Whether to retrieve postmeta or override
* @param int $object_id Object ID
* @param string $meta_key Object metakey
* @return mixed Object's oEmbed cached data
*/
public function hijack_oembed_cache_get( $check, $object_id, $meta_key ) {
if ( ! $this->hijack || ( $this->object_id != $object_id && 1987645321 !== $object_id ) ) {
return $check;
}
if ( $this->ajax_update ) {
return false;
}
// Get cached data
return ( 'options-page' === $this->object_type )
? cmbre2_options( $this->object_id )->get( $this->embed_args['cache_key'] )
: get_metadata( $this->object_type, $this->object_id, $meta_key, true );
}
/**
* Hijacks saving of cached oEmbed.
* Saves cached data to relevant object metadata (vs postmeta)
*
* @since 0.9.5
* @param boolean $check Whether to continue setting postmeta
* @param int $object_id Object ID to get postmeta from
* @param string $meta_key Postmeta's key
* @param mixed $meta_value Value of the postmeta to be saved
* @return boolean Whether to continue setting
*/
public function hijack_oembed_cache_set( $check, $object_id, $meta_key, $meta_value ) {
if ( ! $this->hijack || ( $this->object_id != $object_id && 1987645321 !== $object_id ) ) {
return $check;
}
$this->oembed_cache_set( $meta_key, $meta_value );
// Anything other than `null` to cancel saving to postmeta
return true;
}
/**
* Saves the cached oEmbed value to relevant object metadata (vs postmeta)
*
* @since 1.3.0
* @param string $meta_key Postmeta's key
* @param mixed $meta_value Value of the postmeta to be saved
*/
public function oembed_cache_set( $meta_key, $meta_value ) {
// Cache the result to our metadata
return ( 'options-page' !== $this->object_type )
? update_metadata( $this->object_type, $this->object_id, $meta_key, $meta_value )
: cmbre2_options( $this->object_id )->update( $this->embed_args['cache_key'], $meta_value, true );
}
}