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ðŸ“„ cmb_Meta_Box_Sanitize.php(10.57 KB)
ðŸ“„ cmb_Meta_Box_Show_Filters.php(3.38 KB)
ðŸ“„ cmb_Meta_Box_ajax.php(7.76 KB)
ðŸ“„ cmb_Meta_Box_field.php(17.86 KB)
ðŸ“„ cmb_Meta_Box_types.php(28.95 KB)

Editing: cmb_Meta_Box_ajax.php

<?php

/**
 * CMB ajax methods
 * (i.e. a lot of work to get oEmbeds to work with non-post objects)
 *
 * @since  0.9.5
 */
class cmb_Meta_Box_ajax {

// A single instance of this class.
    public static $instance = null;
    // Whether to hijack the oembed cache system
    public static $hijack = false;
    public static $object_id = 0;
    public static $embed_args = array();
    public static $object_type = 'post';

/**
     * Creates or returns an instance of this class.
     * @since  0.1.0
     * @return cmb_Meta_Box_ajax A single instance of this class.
     */
    public static function get() {
        if (self::$instance === null)
            self::$instance = new self();

return self::$instance;
    }

/**
     * 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['cmb_ajax_nonce'], $_REQUEST['oembed_url']) && wp_verify_nonce($_REQUEST['cmb_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))
            self::send_result('<p class="ui-state-error-text">' . esc_html__('Please Try Again', 'nasa-core') . '</p>', false);

// 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);

// Get embed code (or fallback link)
        $html = self::get_oembed($oembed_url, $_REQUEST['object_id'], array(
            'object_type' => isset($_REQUEST['object_type']) ? $_REQUEST['object_type'] : 'post',
            'oembed_args' => $embed_args,
            'field_id' => $_REQUEST['field_id'],
        ));

self::send_result($html);
    }

/**
     * Retrieves oEmbed from url/object ID
     * @since  0.9.5
     * @param  string $url       URL to retrieve oEmbed
     * @param  int    $object_id Object ID
     * @param  array  $args      Arguments for method
     * @return string            html markup with embed or fallback
     */
    public static function get_oembed($url, $object_id, $args = array()) {
        global $wp_embed;

$oembed_url = esc_url($url);

// Sanitize object_id
        self::$object_id = is_numeric($object_id) ? absint($object_id) : sanitize_text_field($object_id);

$args = wp_parse_args($args, array(
            'object_type' => 'post',
            'oembed_args' => self::$embed_args,
            'field_id' => false,
            'cache_key' => false,
        ));

self::$embed_args = & $args;

// set the post_ID so oEmbed won't fail
        // wp-includes/class-wp-embed.php, WP_Embed::shortcode(), line 162
        $wp_embed->post_ID = self::$object_id;

// Special scenario if NOT a post object
        if (isset($args['object_type']) && $args['object_type'] != 'post') {

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'] = $args['field_id'] . '_cache';
            }
            // Ok, we need to hijack the oembed cache system
            self::$hijack = true;
            self::$object_type = $args['object_type'];

// Gets ombed cache from our object's meta (vs postmeta)
            add_filter('get_post_metadata', array('cmb_Meta_Box_ajax', 'hijack_oembed_cache_get'), 10, 3);
            // Sets ombed cache in our object's meta (vs postmeta)
            add_filter('update_post_metadata', array('cmb_Meta_Box_ajax', '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="cmb_remove_wrapper"><a href="#" class="cmb_remove_file_button" rel="' . $args['field_id'] . '">' . esc_html__('Remove Embed', 'nasa-core') . '</a></p></div>';

// Otherwise, send back error info that no oEmbeds were found
        return '<p class="ui-state-error-text">' . sprintf(esc_html__('No oEmbed Results Found for %s. View more info at', 'nasa-core'), $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  $meta_key  Object metakey
     * @return mixed              Object's oEmbed cached data
     */
    public static function hijack_oembed_cache_get($check, $object_id, $meta_key) {

if (!self::$hijack || (self::$object_id != $object_id && 1987645321 !== $object_id))
            return $check;

// get cached data
        $data = 'options-page' === self::$object_type ? cmb_Meta_Box::get_option(self::$object_id, self::$embed_args['cache_key']) : get_metadata(self::$object_type, self::$object_id, $meta_key, true);

return $data;
    }

/**
     * 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   $meta_value Value of the postmeta to be saved
     * @return boolean             Whether to continue setting
     */
    public static function hijack_oembed_cache_set($check, $object_id, $meta_key, $meta_value) {
        if (!self::$hijack || ( self::$object_id != $object_id && 1987645321 !== $object_id ))
            return $check;

// Cache the result to our metadata
        if ('options-page' === self::$object_type) {
            // Set the option
            cmb_Meta_Box::update_option(self::$object_id, self::$embed_args['cache_key'], $meta_value, array('type' => 'oembed'));
            // Save the option
            cmb_Meta_Box::save_option(self::$object_id);
        } else {
            update_metadata(self::$object_type, self::$object_id, $meta_key, $meta_value);
        }

// Anything other than `null` to cancel saving to postmeta
        return true;
    }

/**
     * Helper to send json encoded response to ajax
     * @since  0.9.5
     * @param  string  $data    Data to be shown via ajax
     * @param  boolean $success Success or fail
     */
    public static function send_result($data, $success = true) {
        $found = $success ? 'found' : 'not found';
        // send back our encoded data
        echo json_encode(array('result' => $data, 'id' => $found));
        die();
    }

}

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