506 lines
16 KiB
PHP
506 lines
16 KiB
PHP
<?php
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require_once( JETPACK__PLUGIN_DIR . 'sal/class.json-api-date.php' );
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/**
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* Class to handle different actions related to media.
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*/
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class Jetpack_Media {
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public static $WP_ORIGINAL_MEDIA = '_wp_original_post_media';
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public static $WP_REVISION_HISTORY = '_wp_revision_history';
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public static $REVISION_HISTORY_MAXIMUM_AMOUNT = 0;
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public static $WP_ATTACHMENT_IMAGE_ALT = '_wp_attachment_image_alt';
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/**
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* Generate a filename in function of the original filename of the media.
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* The returned name has the `{basename}-{hash}-{random-number}.{ext}` shape.
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* The hash is built according to the filename trying to avoid name collisions
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* with other media files.
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*
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* @param number $media_id - media post ID
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* @param string $new_filename - the new filename
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* @return string A random filename.
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*/
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public static function generate_new_filename( $media_id, $new_filename ) {
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// get the right filename extension
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$new_filename_paths = pathinfo( $new_filename );
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$new_file_ext = $new_filename_paths['extension'];
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// take out filename from the original file or from the current attachment
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$original_media = (array) self::get_original_media( $media_id );
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if ( ! empty( $original_media ) ) {
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$original_file_parts = pathinfo( $original_media['file'] );
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$filename_base = $original_file_parts['filename'];
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} else {
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$current_file = get_attached_file( $media_id );
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$current_file_parts = pathinfo( $current_file );
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$current_file_ext = $current_file_parts['filename'];
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$filename_base = $current_file_parts['filename'];
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}
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// add unique seed based on the filename
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$filename_base .= '-' . crc32( $filename_base ) . '-';
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$number_suffix = time() . rand( 100, 999 );
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do {
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$filename = $filename_base;
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$filename .= $number_suffix;
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$file_ext = $new_file_ext ? $new_file_ext : $current_file_ext;
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$new_filename = "{$filename}.{$file_ext}";
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$new_path = "{$current_file_parts['dirname']}/$new_filename";
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$number_suffix++;
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} while( file_exists( $new_path ) );
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return $new_filename;
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}
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/**
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* File urls use the post (image item) date to generate a folder path.
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* Post dates can change, so we use the original date used in the `guid`
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* url so edits can remain in the same folder. In the following function
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* we capture a string in the format of `YYYY/MM` from the guid.
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*
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* For example with a guid of
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* "http://test.files.wordpress.com/2016/10/test.png" the resulting string
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* would be: "2016/10"
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*
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* @param number $media_id
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* @return string
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*/
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private function get_time_string_from_guid( $media_id ) {
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$time = date( "Y/m", strtotime( current_time( 'mysql' ) ) );
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if ( $media = get_post( $media_id ) ) {
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$pattern = '/\/(\d{4}\/\d{2})\//';
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preg_match( $pattern, $media->guid, $matches );
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if ( count( $matches ) > 1 ) {
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$time = $matches[1];
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}
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}
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return $time;
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}
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/**
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* Return an array of allowed mime_type items used to upload a media file.
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*
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* @return array mime_type array
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*/
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static function get_allowed_mime_types( $default_mime_types ) {
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return array_unique( array_merge( $default_mime_types, array(
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'application/msword', // .doc
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'application/vnd.ms-powerpoint', // .ppt, .pps
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'application/vnd.ms-excel', // .xls
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'application/vnd.openxmlformats-officedocument.presentationml.presentation', // .pptx
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'application/vnd.openxmlformats-officedocument.presentationml.slideshow', // .ppsx
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'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', // .xlsx
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'application/vnd.openxmlformats-officedocument.wordprocessingml.document', // .docx
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'application/vnd.oasis.opendocument.text', // .odt
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'application/pdf', // .pdf
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) ) );
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}
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/**
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* Checks that the mime type of the file
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* is among those in a filterable list of mime types.
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*
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* @param string $file Path to file to get its mime type.
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* @return bool
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*/
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protected static function is_file_supported_for_sideloading( $file ) {
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if ( class_exists( 'finfo' ) ) { // php 5.3+
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// phpcs:ignore PHPCompatibility.PHP.NewClasses.finfoFound
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$finfo = new finfo( FILEINFO_MIME );
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$mime = explode( '; ', $finfo->file( $file ) );
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$type = $mime[0];
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} elseif ( function_exists( 'mime_content_type' ) ) { // PHP 5.2
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$type = mime_content_type( $file );
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} else {
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return false;
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}
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/**
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* Filter the list of supported mime types for media sideloading.
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*
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* @since 4.0
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*
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* @module json-api
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*
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* @param array $supported_mime_types Array of the supported mime types for media sideloading.
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*/
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$supported_mime_types = apply_filters( 'jetpack_supported_media_sideload_types', array(
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'image/png',
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'image/jpeg',
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'image/gif',
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'image/bmp',
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'video/quicktime',
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'video/mp4',
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'video/mpeg',
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'video/ogg',
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'video/3gpp',
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'video/3gpp2',
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'video/h261',
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'video/h262',
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'video/h264',
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'video/x-msvideo',
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'video/x-ms-wmv',
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'video/x-ms-asf',
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) );
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// If the type returned was not an array as expected, then we know we don't have a match.
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if ( ! is_array( $supported_mime_types ) ) {
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return false;
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}
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return in_array( $type, $supported_mime_types );
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}
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/**
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* Try to remove the temporal file from the given file array.
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*
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* @param array $file_array Array with data about the temporal file
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* @return bool `true` if the file has been removed. `false` either the file doesn't exist or it couldn't be removed.
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*/
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private static function remove_tmp_file( $file_array ) {
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if ( ! file_exists ( $file_array['tmp_name'] ) ) {
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return false;
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}
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return @unlink( $file_array['tmp_name'] );
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}
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/**
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* Save the given temporal file considering file type,
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* correct location according to the original file path, etc.
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* The file type control is done through of `jetpack_supported_media_sideload_types` filter,
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* which allows define to the users their own file types list.
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*
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* @param array $file_array file to save
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* @param number $media_id
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* @return array|WP_Error an array with information about the new file saved or a WP_Error is something went wrong.
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*/
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public static function save_temporary_file( $file_array, $media_id ) {
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$tmp_filename = $file_array['tmp_name'];
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if ( ! file_exists( $tmp_filename ) ) {
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return new WP_Error( 'invalid_input', 'No media provided in input.' );
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}
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// add additional mime_types through of the `jetpack_supported_media_sideload_types` filter
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$mime_type_static_filter = array(
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'Jetpack_Media',
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'get_allowed_mime_types'
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);
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add_filter( 'jetpack_supported_media_sideload_types', $mime_type_static_filter );
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if (
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! self::is_file_supported_for_sideloading( $tmp_filename ) &&
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! file_is_displayable_image( $tmp_filename )
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) {
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@unlink( $tmp_filename );
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return new WP_Error( 'invalid_input', 'Invalid file type.', 403 );
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}
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remove_filter( 'jetpack_supported_media_sideload_types', $mime_type_static_filter );
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// generate a new file name
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$tmp_new_filename = self::generate_new_filename( $media_id, $file_array[ 'name' ] );
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// start to create the parameters to move the temporal file
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$overrides = array( 'test_form' => false );
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// get time according to the original filaname
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$time = self::get_time_string_from_guid( $media_id );
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$file_array['name'] = $tmp_new_filename;
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$file = wp_handle_sideload( $file_array, $overrides, $time );
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self::remove_tmp_file( $file_array );
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if ( isset( $file['error'] ) ) {
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return new WP_Error( 'upload_error', $file['error'] );
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}
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return $file;
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}
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/**
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* Return an object with an snapshot of a revision item.
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*
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* @param object $media_item - media post object
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* @return object a revision item
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*/
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public static function get_snapshot( $media_item ) {
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$current_file = get_attached_file( $media_item->ID );
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$file_paths = pathinfo( $current_file );
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$snapshot = array(
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'date' => (string) WPCOM_JSON_API_Date::format_date( $media_item->post_modified_gmt, $media_item->post_modified ),
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'URL' => (string) wp_get_attachment_url( $media_item->ID ),
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'file' => (string) $file_paths['basename'],
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'extension' => (string) $file_paths['extension'],
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'mime_type' => (string) $media_item->post_mime_type,
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'size' => (int) filesize( $current_file )
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);
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return (object) $snapshot;
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}
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/**
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* Add a new item into revision_history array.
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*
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* @param object $media_item - media post object
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* @param file $file - file recently added
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* @param bool $has_original_media - condition is the original media has been already added
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* @return bool `true` if the item has been added. Otherwise `false`.
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*/
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public static function register_revision( $media_item, $file, $has_original_media ) {
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if ( is_wp_error( $file ) || ! $has_original_media ) {
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return false;
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}
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add_post_meta( $media_item->ID, self::$WP_REVISION_HISTORY, self::get_snapshot( $media_item ) );
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}
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/**
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* Return the `revision_history` of the given media.
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*
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* @param number $media_id - media post ID
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* @return array `revision_history` array
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*/
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public static function get_revision_history( $media_id ) {
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return array_reverse( get_post_meta( $media_id, self::$WP_REVISION_HISTORY ) );
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}
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/**
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* Return the original media data
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*/
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public static function get_original_media( $media_id ) {
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$original = get_post_meta( $media_id, self::$WP_ORIGINAL_MEDIA, true );
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$original = $original ? $original : array();
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return $original;
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}
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public static function delete_file( $pathname ) {
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if ( ! file_exists( $pathname ) || ! is_file( $pathname ) ) {
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// let's touch a fake file to try to `really` remove the media file
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touch( $pathname );
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}
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return wp_delete_file( $pathname );
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}
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/**
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* Try to delete a file according to the dirname of
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* the media attached file and the filename.
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*
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* @param number $media_id - media post ID
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* @param string $filename - basename of the file ( name-of-file.ext )
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* @return bool `true` is the file has been removed, `false` if not.
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*/
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private static function delete_media_history_file( $media_id, $filename ) {
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$attached_path = get_attached_file( $media_id );
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$attached_parts = pathinfo( $attached_path );
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$dirname = $attached_parts['dirname'];
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$pathname = $dirname . '/' . $filename;
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// remove thumbnails
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$metadata = wp_generate_attachment_metadata( $media_id, $pathname );
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if ( isset( $metadata ) && isset( $metadata['sizes'] ) ) {
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foreach ( $metadata['sizes'] as $size => $properties ) {
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self::delete_file( $dirname . '/' . $properties['file'] );
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}
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}
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// remove primary file
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self::delete_file( $pathname );
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}
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/**
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* Remove specific items from the `revision history` array
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* depending on the given criteria: array(
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* 'from' => (int) <from>,
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* 'to' => (int) <to>,
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* )
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*
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* Also, it removes the file defined in each item.
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*
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* @param number $media_id - media post ID
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* @param object $criteria - criteria to remove the items
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* @param array [$revision_history] - revision history array
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* @return array `revision_history` array updated.
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*/
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public static function remove_items_from_revision_history( $media_id, $criteria = array(), $revision_history ) {
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if ( ! isset ( $revision_history ) ) {
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$revision_history = self::get_revision_history( $media_id );
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}
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$from = $criteria['from'];
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$to = $criteria['to'] ? $criteria['to'] : ( $from + 1 );
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for ( $i = $from; $i < $to; $i++ ) {
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$removed_item = array_slice( $revision_history, $from, 1 );
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if ( ! $removed_item ) {
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break;
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}
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array_splice( $revision_history, $from, 1 );
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self::delete_media_history_file( $media_id, $removed_item[0]->file );
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}
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// override all history items
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delete_post_meta( $media_id, self::$WP_REVISION_HISTORY );
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$revision_history = array_reverse( $revision_history );
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foreach ( $revision_history as &$item ) {
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add_post_meta( $media_id, self::$WP_REVISION_HISTORY, $item );
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}
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return $revision_history;
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}
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/**
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* Limit the number of items of the `revision_history` array.
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* When the stack is overflowing the oldest item is remove from there (FIFO).
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*
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* @param number $media_id - media post ID
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* @param number [$limit] - maximun amount of items. 20 as default.
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* @return array items removed from `revision_history`
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*/
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public static function limit_revision_history( $media_id, $limit = null) {
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if ( is_null( $limit ) ) {
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$limit = self::$REVISION_HISTORY_MAXIMUM_AMOUNT;
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}
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$revision_history = self::get_revision_history( $media_id );
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$total = count( $revision_history );
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if ( $total < $limit ) {
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return array();
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}
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self::remove_items_from_revision_history(
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$media_id,
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array( 'from' => $limit, 'to' => $total ),
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$revision_history
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);
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return self::get_revision_history( $media_id );
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}
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/**
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* Remove the original file and clean the post metadata.
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*
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* @param number $media_id - media post ID
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*/
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public static function clean_original_media( $media_id ) {
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$original_file = self::get_original_media( $media_id );
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if ( ! $original_file ) {
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return null;
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}
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self::delete_media_history_file( $media_id, $original_file->file );
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return delete_post_meta( $media_id, self::$WP_ORIGINAL_MEDIA );
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}
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/**
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* Clean `revision_history` of the given $media_id. it means:
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* - remove all media files tied to the `revision_history` items.
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* - clean `revision_history` meta data.
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* - remove and clean the `original_media`
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*
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* @param number $media_id - media post ID
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* @return array results of removing these files
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*/
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public static function clean_revision_history( $media_id ) {
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self::clean_original_media( $media_id );
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$revision_history = self::get_revision_history( $media_id );
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$total = count( $revision_history );
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$updated_history = array();
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if ( $total < 1 ) {
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return $updated_history;
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}
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$updated_history = self::remove_items_from_revision_history(
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$media_id,
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array( 'from' => 0, 'to' => $total ),
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$revision_history
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);
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return $updated_history;
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}
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/**
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* Edit media item process:
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*
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* - update attachment file
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* - preserve original media file
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* - trace revision history
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*
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* @param number $media_id - media post ID
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* @param array $file_array - temporal file
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* @return {Post|WP_Error} Updated media item or a WP_Error is something went wrong.
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*/
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public static function edit_media_file( $media_id, $file_array ) {
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$media_item = get_post( $media_id );
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$has_original_media = self::get_original_media( $media_id );
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if ( ! $has_original_media ) {
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// The first time that the media is updated
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// the original media is stored into the revision_history
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$snapshot = self::get_snapshot( $media_item );
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add_post_meta( $media_id, self::$WP_ORIGINAL_MEDIA, $snapshot, true );
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}
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// save temporary file in the correct location
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$uploaded_file = self::save_temporary_file( $file_array, $media_id );
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if ( is_wp_error( $uploaded_file ) ) {
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self::remove_tmp_file( $file_array );
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return $uploaded_file;
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}
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// revision_history control
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self::register_revision( $media_item, $uploaded_file, $has_original_media );
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$uploaded_path = $uploaded_file['file'];
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$udpated_mime_type = $uploaded_file['type'];
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$was_updated = update_attached_file( $media_id, $uploaded_path );
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if ( ! $was_updated ) {
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return WP_Error( 'update_error', 'Media update error' );
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}
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$new_metadata = wp_generate_attachment_metadata( $media_id, $uploaded_path );
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wp_update_attachment_metadata( $media_id, $new_metadata );
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// check maximum amount of revision_history
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self::limit_revision_history( $media_id );
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$edited_action = wp_update_post( (object) array(
|
|
'ID' => $media_id,
|
|
'post_mime_type' => $udpated_mime_type
|
|
), true );
|
|
|
|
if ( is_wp_error( $edited_action ) ) {
|
|
return $edited_action;
|
|
}
|
|
|
|
return $media_item;
|
|
}
|
|
}
|
|
|
|
// hook: clean revision history when the media item is deleted
|
|
function clean_revision_history( $media_id ) {
|
|
Jetpack_Media::clean_revision_history( $media_id );
|
|
};
|
|
|
|
add_action( 'delete_attachment', 'clean_revision_history' );
|
|
|