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Viewing / Editing File: class.videopress-ajax.php

<?php

use Automattic\Jetpack\Connection\Client;

class VideoPress_AJAX {

/**
	 * @var VideoPress_AJAX
	 **/
	private static $instance = null;

/**
	 * Private VideoPress_AJAX constructor.
	 *
	 * Use the VideoPress_AJAX::init() method to get an instance.
	 */
	private function __construct() {
		add_action( 'wp_ajax_videopress-get-upload-token', array( $this, 'wp_ajax_videopress_get_upload_token' ) );
		add_action( 'wp_ajax_videopress-get-upload-jwt', array( $this, 'wp_ajax_videopress_get_upload_jwt' ) );
		add_action( 'wp_ajax_nopriv_videopress-get-playback-jwt', array( $this, 'wp_ajax_videopress_get_playback_jwt' ) );
		add_action( 'wp_ajax_videopress-get-playback-jwt', array( $this, 'wp_ajax_videopress_get_playback_jwt' ) );

add_action(
			'wp_ajax_videopress-update-transcoding-status',
			array(
				$this,
				'wp_ajax_update_transcoding_status',
			),
			-1
		);
	}

/**
	 * Initialize the VideoPress_AJAX and get back a singleton instance.
	 *
	 * @return VideoPress_AJAX
	 */
	public static function init() {
		if ( is_null( self::$instance ) ) {
			self::$instance = new VideoPress_AJAX();
		}

return self::$instance;
	}

/**
	 * Validate a guid.
	 *
	 * @param string $guid The guid to validate.
	 *
	 * @return bool
	 **/
	private function is_valid_guid( $guid ) {
		if ( empty( $guid ) ) {
			return false;
		}

preg_match( '/^[a-z0-9]+$/i', $guid, $matches );

if ( empty( $matches ) ) {
			return false;
		}

return true;
	}

/**
	 * Ajax method that is used by the VideoPress player to get a token to play a video.
	 *
	 * This is used for both logged in and logged out users.
	 *
	 * @return void
	 */
	public function wp_ajax_videopress_get_playback_jwt() {
		$guid = filter_input( INPUT_POST, 'guid' );
		if ( ! $this->is_valid_guid( $guid ) ) {
			wp_send_json_error( array( 'message' => __( 'need a guid', 'jetpack' ) ) );
			return;
		}

if ( ! $this->is_current_user_authed_for_video( $guid ) ) {
			return;
		}

$token = $this->request_jwt_from_wpcom( $guid );

if ( empty( $token ) ) {
			wp_send_json_error( array( 'message' => __( 'Could not obtain a VideoPress playback JWT. Please try again later. (empty upload token)', 'jetpack' ) ) );
			return;
		}

if ( is_wp_error( $token ) ) {
			wp_send_json_error( array( 'message' => __( 'Could not obtain a VideoPress upload JWT. Please try again later.', 'jetpack' ) ) );
			return;
		}

wp_send_json_success( array( 'jwt' => $token ) );
	}

/**
	 * Determines if the current user can view the provided video.
	 *
	 * Filterable for 3rd party plugins.
	 *
	 * @param string $guid The video id being checked.
	 */
	private function is_current_user_authed_for_video( $guid ) {
		$attachment = videopress_get_post_by_guid( $guid );
		if ( ! $attachment ) {
			return false;
		}

$video_info = video_get_info_by_blogpostid( get_current_blog_id(), $attachment->ID );
		if ( null === $video_info->guid ) {
			return false;
		}

$is_user_authed = false;
		// Determine if video is public, private or use site default.
		switch ( $video_info->privacy_setting ) {
			case VIDEOPRESS_PRIVACY::IS_PUBLIC:
				$is_user_authed = true;
				break;
			case VIDEOPRESS_PRIVACY::IS_PRIVATE:
				$is_user_authed = current_user_can( 'read' );
				break;
			case VIDEOPRESS_PRIVACY::SITE_DEFAULT:
			default:
				$is_videopress_private_for_site = get_option( 'videopress_private_enabled_for_site', false );
				$is_user_authed                 = false === $is_videopress_private_for_site || ( $is_videopress_private_for_site && current_user_can( 'read' ) );
				break;
		}

/**
		 * Overrides video view authorization for current user.
		 *
		 * Example of making all videos public:
		 *
		 * function jp_example_override_video_auth( $is_user_authed, $guid ) {
		 *  return true
		 * };
		 * add_filter( 'videopress_is_current_user_authed_for_video', 'jp_example_override_video_auth', 10, 2 );
		 *
		 * @param bool   $is_user_authed The current user authorization state.
		 * @param string $guid           The video's unique identifier.
		 *
		 * @return bool
		 */
		return (bool) apply_filters( 'videopress_is_current_user_authed_for_video', $is_user_authed, $guid );
	}

/**
	 * Requests JWT from wpcom.
	 *
	 * @param string $guid The video id being checked.
	 */
	private function request_jwt_from_wpcom( $guid ) {
		$options = VideoPress_Options::get_options();

$args = array(
			'method' => 'POST',
		);

$endpoint = "sites/{$options['shadow_blog_id']}/media/videopress-playback-jwt/{$guid}";
		$result   = Client::wpcom_json_api_request_as_blog( $endpoint, 'v2', $args, null, 'wpcom' );
		if ( is_wp_error( $result ) ) {
			return $result;
		}

$response = json_decode( $result['body'], true );

if ( empty( $response['metadata_token'] ) ) {
			return false;
		}

return $response['metadata_token'];
	}

/**
	 * Ajax method that is used by the VideoPress uploader to get a token to upload a file to the wpcom api.
	 *
	 * @return void
	 */
	public function wp_ajax_videopress_get_upload_jwt() {

$options = VideoPress_Options::get_options();

$args = array(
			'method' => 'POST',
			// 'sslverify' => false,
		);

$endpoint = "sites/{$options['shadow_blog_id']}/media/videopress-upload-jwt";
		$result   = Client::wpcom_json_api_request_as_blog( $endpoint, 'v2', $args, null, 'wpcom' );
		if ( is_wp_error( $result ) ) {
			wp_send_json_error( array( 'message' => __( 'Could not obtain a VideoPress upload JWT. Please try again later.', 'jetpack' ) ) );
			return;
		}

$response = json_decode( $result['body'], true );

if ( empty( $response['upload_token'] ) ) {
			wp_send_json_error( array( 'message' => __( 'Could not obtain a VideoPress upload JWT. Please try again later. (empty upload token)', 'jetpack' ) ) );
			return;
		}

$response['upload_action_url'] = videopress_make_resumable_upload_path( $options['shadow_blog_id'] );

wp_send_json_success( $response );
	}

/**
	 * Ajax method that is used by the VideoPress uploader to get a token to upload a file to the wpcom api.
	 *
	 * @return void
	 */
	public function wp_ajax_videopress_get_upload_token() {

$options = VideoPress_Options::get_options();

$args = array(
			'method' => 'POST',
		);

$endpoint = "sites/{$options['shadow_blog_id']}/media/token";
		$result   = Client::wpcom_json_api_request_as_blog( $endpoint, Client::WPCOM_JSON_API_VERSION, $args );

if ( is_wp_error( $result ) ) {
			wp_send_json_error( array( 'message' => __( 'Could not obtain a VideoPress upload token. Please try again later.', 'jetpack' ) ) );
			return;
		}

$response = json_decode( $result['body'], true );

if ( empty( $response['upload_token'] ) ) {
			wp_send_json_error( array( 'message' => __( 'Could not obtain a VideoPress upload token. Please try again later.', 'jetpack' ) ) );
			return;
		}

$response['upload_action_url'] = videopress_make_media_upload_path( $options['shadow_blog_id'] );

wp_send_json_success( $response );
	}

/**
	 * Ajax action to update the video transcoding status from the WPCOM API.
	 *
	 * @return void
	 */
	public function wp_ajax_update_transcoding_status() {
		if ( ! isset( $_POST['post_id'] ) ) {
			wp_send_json_error( array( 'message' => __( 'A valid post_id is required.', 'jetpack' ) ) );
			return;
		}

$post_id = (int) $_POST['post_id'];

if ( ! videopress_update_meta_data( $post_id ) ) {
			wp_send_json_error( array( 'message' => __( 'That post does not have a VideoPress video associated to it.', 'jetpack' ) ) );
			return;
		}

wp_send_json_success(
			array(
				'message' => __( 'Status updated', 'jetpack' ),
				'status'  => videopress_get_transcoding_status( $post_id ),
			)
		);
	}
}

// Let's start this thing up.
VideoPress_AJAX::init();

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