Source
File: wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php
public function edit_media_item( $request ) {
require_once ABSPATH . 'wp-admin/includes/image.php';
$attachment_id = $request['id'];
// This also confirms the attachment is an image.
$image_file = wp_get_original_image_path( $attachment_id );
$image_meta = wp_get_attachment_metadata( $attachment_id );
if (
! $image_meta ||
! $image_file ||
! wp_image_file_matches_image_meta( $request['src'], $image_meta, $attachment_id )
) {
return new WP_Error(
'rest_unknown_attachment',
__( 'Unable to get meta information for file.' ),
array( 'status' => 404 )
);
}
$supported_types = array( 'image/jpeg', 'image/png', 'image/gif' );
$mime_type = get_post_mime_type( $attachment_id );
if ( ! in_array( $mime_type, $supported_types, true ) ) {
return new WP_Error(
'rest_cannot_edit_file_type',
__( 'This type of file cannot be edited.' ),
array( 'status' => 400 )
);
}
// Check if we need to do anything.
$rotate = 0;
$crop = false;
if ( ! empty( $request['rotation'] ) ) {
// Rotation direction: clockwise vs. counter clockwise.
$rotate = 0 - (int) $request['rotation'];
}
if ( isset( $request['x'], $request['y'], $request['width'], $request['height'] ) ) {
$crop = true;
}
if ( ! $rotate && ! $crop ) {
return new WP_Error(
'rest_image_not_edited',
__( 'The image was not edited. Edit the image before applying the changes.' ),
array( 'status' => 400 )
);
}
/*
* If the file doesn't exist, attempt a URL fopen on the src link.
* This can occur with certain file replication plugins.
* Keep the original file path to get a modified name later.
*/
$image_file_to_edit = $image_file;
if ( ! file_exists( $image_file_to_edit ) ) {
$image_file_to_edit = _load_image_to_edit_path( $attachment_id );
}
$image_editor = wp_get_image_editor( $image_file_to_edit );
if ( is_wp_error( $image_editor ) ) {
return new WP_Error(
'rest_unknown_image_file_type',
__( 'Unable to edit this image.' ),
array( 'status' => 500 )
);
}
if ( 0 !== $rotate ) {
$result = $image_editor->rotate( $rotate );
if ( is_wp_error( $result ) ) {
return new WP_Error(
'rest_image_rotation_failed',
__( 'Unable to rotate this image.' ),
array( 'status' => 500 )
);
}
}
if ( $crop ) {
$size = $image_editor->get_size();
$crop_x = round( ( $size['width'] * floatval( $request['x'] ) ) / 100.0 );
$crop_y = round( ( $size['height'] * floatval( $request['y'] ) ) / 100.0 );
$width = round( ( $size['width'] * floatval( $request['width'] ) ) / 100.0 );
$height = round( ( $size['height'] * floatval( $request['height'] ) ) / 100.0 );
$result = $image_editor->crop( $crop_x, $crop_y, $width, $height );
if ( is_wp_error( $result ) ) {
return new WP_Error(
'rest_image_crop_failed',
__( 'Unable to crop this image.' ),
array( 'status' => 500 )
);
}
}
// Calculate the file name.
$image_ext = pathinfo( $image_file, PATHINFO_EXTENSION );
$image_name = wp_basename( $image_file, ".{$image_ext}" );
// Do not append multiple `-edited` to the file name.
// The user may be editing a previously edited image.
if ( preg_match( '/-edited(-\d+)?$/', $image_name ) ) {
// Remove any `-1`, `-2`, etc. `wp_unique_filename()` will add the proper number.
$image_name = preg_replace( '/-edited(-\d+)?$/', '-edited', $image_name );
} else {
// Append `-edited` before the extension.
$image_name .= '-edited';
}
$filename = "{$image_name}.{$image_ext}";
// Create the uploads sub-directory if needed.
$uploads = wp_upload_dir();
// Make the file name unique in the (new) upload directory.
$filename = wp_unique_filename( $uploads['path'], $filename );
// Save to disk.
$saved = $image_editor->save( $uploads['path'] . "/$filename" );
if ( is_wp_error( $saved ) ) {
return $saved;
}
// Create new attachment post.
$new_attachment_post = array(
'post_mime_type' => $saved['mime-type'],
'guid' => $uploads['url'] . "/$filename",
'post_title' => $image_name,
'post_content' => '',
);
// Copy post_content, post_excerpt, and post_title from the edited image's attachment post.
$attachment_post = get_post( $attachment_id );
if ( $attachment_post ) {
$new_attachment_post['post_content'] = $attachment_post->post_content;
$new_attachment_post['post_excerpt'] = $attachment_post->post_excerpt;
$new_attachment_post['post_title'] = $attachment_post->post_title;
}
$new_attachment_id = wp_insert_attachment( wp_slash( $new_attachment_post ), $saved['path'], 0, true );
if ( is_wp_error( $new_attachment_id ) ) {
if ( 'db_update_error' === $new_attachment_id->get_error_code() ) {
$new_attachment_id->add_data( array( 'status' => 500 ) );
} else {
$new_attachment_id->add_data( array( 'status' => 400 ) );
}
return $new_attachment_id;
}
// Copy the image alt text from the edited image.
$image_alt = get_post_meta( $attachment_id, '_wp_attachment_image_alt', true );
if ( ! empty( $image_alt ) ) {
// update_post_meta() expects slashed.
update_post_meta( $new_attachment_id, '_wp_attachment_image_alt', wp_slash( $image_alt ) );
}
if ( defined( 'REST_REQUEST' ) && REST_REQUEST ) {
// Set a custom header with the attachment_id.
// Used by the browser/client to resume creating image sub-sizes after a PHP fatal error.
header( 'X-WP-Upload-Attachment-ID: ' . $new_attachment_id );
}
// Generate image sub-sizes and meta.
$new_image_meta = wp_generate_attachment_metadata( $new_attachment_id, $saved['path'] );
// Copy the EXIF metadata from the original attachment if not generated for the edited image.
if ( isset( $image_meta['image_meta'] ) && isset( $new_image_meta['image_meta'] ) && is_array( $new_image_meta['image_meta'] ) ) {
// Merge but skip empty values.
foreach ( (array) $image_meta['image_meta'] as $key => $value ) {
if ( empty( $new_image_meta['image_meta'][ $key ] ) && ! empty( $value ) ) {
$new_image_meta['image_meta'][ $key ] = $value;
}
}
}
// Reset orientation. At this point the image is edited and orientation is correct.
if ( ! empty( $new_image_meta['image_meta']['orientation'] ) ) {
$new_image_meta['image_meta']['orientation'] = 1;
}
// The attachment_id may change if the site is exported and imported.
$new_image_meta['parent_image'] = array(
'attachment_id' => $attachment_id,
// Path to the originally uploaded image file relative to the uploads directory.
'file' => _wp_relative_upload_path( $image_file ),
);
/**
* Filters the meta data for the new image created by editing an existing image.
*
* @since 5.5.0
*
* @param array $new_image_meta Meta data for the new image.
* @param int $new_attachment_id Attachment post ID for the new image.
* @param int $attachment_id Attachment post ID for the edited (parent) image.
*/
$new_image_meta = apply_filters( 'wp_edited_image_metadata', $new_image_meta, $new_attachment_id, $attachment_id );
wp_update_attachment_metadata( $new_attachment_id, $new_image_meta );
$response = $this->prepare_item_for_response( get_post( $new_attachment_id ), $request );
$response->set_status( 201 );
$response->header( 'Location', rest_url( sprintf( '%s/%s/%s', $this->namespace, $this->rest_base, $new_attachment_id ) ) );
return $response;
}