324 lines
9.1 KiB
PHP
Executable File
324 lines
9.1 KiB
PHP
Executable File
<?php
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/**
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* CMB2 ajax methods
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* (i.e. a lot of work to get oEmbeds to work with non-post objects)
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*
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* @since 0.9.5
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*
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* @category WordPress_Plugin
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* @package CMB2
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* @author CMB2 team
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* @license GPL-2.0+
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*/
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class CMB2_Ajax {
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// Whether to hijack the oembed cache system.
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protected $hijack = false;
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protected $object_id = 0;
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protected $embed_args = array();
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protected $object_type = 'post';
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protected $ajax_update = false;
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/**
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* Instance of this class.
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*
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* @since 2.2.2
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* @var object
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*/
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protected static $instance;
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/**
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* Get the singleton instance of this class.
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*
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* @since 2.2.2
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* @return CMB2_Ajax
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*/
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public static function get_instance() {
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if ( ! ( self::$instance instanceof self ) ) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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/**
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* Constructor
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*
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* @since 2.2.0
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*/
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protected function __construct() {
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add_action( 'wp_ajax_cmb2_oembed_handler', array( $this, 'oembed_handler' ) );
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add_action( 'wp_ajax_nopriv_cmb2_oembed_handler', array( $this, 'oembed_handler' ) );
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// Need to occasionally clean stale oembed cache data from the option value.
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add_action( 'cmb2_save_options-page_fields', array( __CLASS__, 'clean_stale_options_page_oembeds' ) );
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}
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/**
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* Handles our oEmbed ajax request
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*
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* @since 0.9.5
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* @return mixed oEmbed embed code | fallback | error message
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*/
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public function oembed_handler() {
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// Verify our nonce.
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if ( ! ( isset( $_REQUEST['cmb2_ajax_nonce'], $_REQUEST['oembed_url'] ) && wp_verify_nonce( $_REQUEST['cmb2_ajax_nonce'], 'ajax_nonce' ) ) ) {
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die();
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}
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// Sanitize our search string.
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$oembed_string = sanitize_text_field( $_REQUEST['oembed_url'] );
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// Send back error if empty.
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if ( empty( $oembed_string ) ) {
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wp_send_json_error( '<p class="ui-state-error-text">' . esc_html__( 'Please Try Again', 'cmb2' ) . '</p>' );
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}
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// Set width of embed.
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$embed_width = isset( $_REQUEST['oembed_width'] ) && intval( $_REQUEST['oembed_width'] ) < 640 ? intval( $_REQUEST['oembed_width'] ) : '640';
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// Set url.
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$oembed_url = esc_url( $oembed_string );
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// Set args.
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$embed_args = array(
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'width' => $embed_width,
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);
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$this->ajax_update = true;
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// Get embed code (or fallback link).
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$html = $this->get_oembed( array(
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'url' => $oembed_url,
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'object_id' => $_REQUEST['object_id'],
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'object_type' => isset( $_REQUEST['object_type'] ) ? sanitize_text_field( $_REQUEST['object_type'] ) : 'post',
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'oembed_args' => $embed_args,
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'field_id' => $_REQUEST['field_id'],
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) );
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wp_send_json_success( $html );
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}
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/**
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* Retrieves oEmbed from url/object ID
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*
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* @since 0.9.5
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* @param array $args Arguments for method.
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* @return mixed HTML markup with embed or fallback.
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*/
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public function get_oembed_no_edit( $args ) {
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global $wp_embed;
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$oembed_url = esc_url( $args['url'] );
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// Sanitize object_id.
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$this->object_id = is_numeric( $args['object_id'] ) ? absint( $args['object_id'] ) : sanitize_text_field( $args['object_id'] );
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$args = wp_parse_args( $args, array(
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'object_type' => 'post',
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'oembed_args' => array(),
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'field_id' => false,
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'wp_error' => false,
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) );
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$this->embed_args =& $args;
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/*
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* Set the post_ID so oEmbed won't fail
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* wp-includes/class-wp-embed.php, WP_Embed::shortcode()
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*/
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$wp_embed->post_ID = $this->object_id;
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// Special scenario if NOT a post object.
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if ( isset( $args['object_type'] ) && 'post' != $args['object_type'] ) {
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if ( 'options-page' == $args['object_type'] ) {
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// Bogus id to pass some numeric checks. Issue with a VERY large WP install?
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$wp_embed->post_ID = 1987645321;
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}
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// Ok, we need to hijack the oembed cache system.
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$this->hijack = true;
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$this->object_type = $args['object_type'];
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// Gets ombed cache from our object's meta (vs postmeta).
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add_filter( 'get_post_metadata', array( $this, 'hijack_oembed_cache_get' ), 10, 3 );
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// Sets ombed cache in our object's meta (vs postmeta).
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add_filter( 'update_post_metadata', array( $this, 'hijack_oembed_cache_set' ), 10, 4 );
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}
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$embed_args = '';
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foreach ( $args['oembed_args'] as $key => $val ) {
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$embed_args .= " $key=\"$val\"";
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}
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// Ping WordPress for an embed.
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$embed = $wp_embed->run_shortcode( '[embed' . $embed_args . ']' . $oembed_url . '[/embed]' );
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// Fallback that WordPress creates when no oEmbed was found.
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$fallback = $wp_embed->maybe_make_link( $oembed_url );
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return compact( 'embed', 'fallback', 'args' );
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}
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/**
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* Retrieves oEmbed from url/object ID
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*
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* @since 0.9.5
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* @param array $args Arguments for method.
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* @return string HTML markup with embed or fallback.
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*/
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public function get_oembed( $args ) {
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$oembed = $this->get_oembed_no_edit( $args );
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// Send back our embed.
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if ( $oembed['embed'] && $oembed['embed'] != $oembed['fallback'] ) {
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return '<div class="cmb2-oembed embed-status">' . $oembed['embed'] . '<p class="cmb2-remove-wrapper"><a href="#" class="cmb2-remove-file-button" rel="' . $oembed['args']['field_id'] . '">' . esc_html__( 'Remove Embed', 'cmb2' ) . '</a></p></div>';
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}
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// Otherwise, send back error info that no oEmbeds were found.
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return sprintf(
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'<p class="ui-state-error-text">%s</p>',
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sprintf(
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/* translators: 1: results for. 2: link to codex.wordpress.org/Embeds */
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esc_html__( 'No oEmbed Results Found for %1$s. View more info at %2$s.', 'cmb2' ),
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$oembed['fallback'],
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'<a href="https://codex.wordpress.org/Embeds" target="_blank">codex.wordpress.org/Embeds</a>'
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)
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);
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}
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/**
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* Hijacks retrieving of cached oEmbed.
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* Returns cached data from relevant object metadata (vs postmeta)
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*
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* @since 0.9.5
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* @param boolean $check Whether to retrieve postmeta or override.
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* @param int $object_id Object ID.
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* @param string $meta_key Object metakey.
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* @return mixed Object's oEmbed cached data.
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*/
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public function hijack_oembed_cache_get( $check, $object_id, $meta_key ) {
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if ( ! $this->hijack || ( $this->object_id != $object_id && 1987645321 !== $object_id ) ) {
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return $check;
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}
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if ( $this->ajax_update ) {
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return false;
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}
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return $this->cache_action( $meta_key );
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}
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/**
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* Hijacks saving of cached oEmbed.
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* Saves cached data to relevant object metadata (vs postmeta)
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*
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* @since 0.9.5
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* @param boolean $check Whether to continue setting postmeta.
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* @param int $object_id Object ID to get postmeta from.
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* @param string $meta_key Postmeta's key.
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* @param mixed $meta_value Value of the postmeta to be saved.
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* @return boolean Whether to continue setting.
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*/
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public function hijack_oembed_cache_set( $check, $object_id, $meta_key, $meta_value ) {
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if (
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! $this->hijack
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|| ( $this->object_id != $object_id && 1987645321 !== $object_id )
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// Only want to hijack oembed meta values.
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|| 0 !== strpos( $meta_key, '_oembed_' )
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) {
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return $check;
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}
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$this->cache_action( $meta_key, $meta_value );
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// Anything other than `null` to cancel saving to postmeta.
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return true;
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}
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/**
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* Gets/updates the cached oEmbed value from/to relevant object metadata (vs postmeta).
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*
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* @since 1.3.0
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*
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* @param string $meta_key Postmeta's key.
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* @return mixed
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*/
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protected function cache_action( $meta_key ) {
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$func_args = func_get_args();
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$action = isset( $func_args[1] ) ? 'update' : 'get';
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if ( 'options-page' === $this->object_type ) {
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$args = array( $meta_key );
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if ( 'update' === $action ) {
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$args[] = $func_args[1];
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$args[] = true;
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}
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// Cache the result to our options.
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$status = call_user_func_array( array( cmb2_options( $this->object_id ), $action ), $args );
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} else {
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$args = array( $this->object_type, $this->object_id, $meta_key );
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$args[] = 'update' === $action ? $func_args[1] : true;
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// Cache the result to our metadata.
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$status = call_user_func_array( $action . '_metadata', $args );
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}
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return $status;
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}
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/**
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* Hooks in when options-page data is saved to clean stale
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* oembed cache data from the option value.
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*
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* @since 2.2.0
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* @param string $option_key The options-page option key.
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* @return void
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*/
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public static function clean_stale_options_page_oembeds( $option_key ) {
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$options = cmb2_options( $option_key )->get_options();
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$modified = false;
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if ( is_array( $options ) ) {
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$ttl = apply_filters( 'oembed_ttl', DAY_IN_SECONDS, '', array(), 0 );
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$now = time();
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foreach ( $options as $key => $value ) {
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// Check for cached oembed data.
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if ( 0 === strpos( $key, '_oembed_time_' ) ) {
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$cached_recently = ( $now - $value ) < $ttl;
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if ( ! $cached_recently ) {
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$modified = true;
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// Remove the the cached ttl expiration, and the cached oembed value.
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unset( $options[ $key ] );
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unset( $options[ str_replace( '_oembed_time_', '_oembed_', $key ) ] );
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}
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} // End if.
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// Remove the cached unknown values.
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elseif ( '{{unknown}}' === $value ) {
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$modified = true;
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unset( $options[ $key ] );
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}
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}
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}
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// Update the option and remove stale cache data.
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if ( $modified ) {
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$updated = cmb2_options( $option_key )->set( $options );
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}
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}
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}
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