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<?php
/**
* ################################################################################
* IMSANITY AJAX FUNCTIONS
* ################################################################################
*/
add_action('wp_ajax_imsanity_get_images', 'imsanity_get_images');
add_action('wp_ajax_imsanity_resize_image', 'imsanity_resize_image');
/**
* Verifies that the current user has administrator permission and, if not,
* renders a json warning and dies
*/
function imsanity_verify_permission()
{
if ( ! current_user_can( 'administrator' ) ) { // this isn't a real capability, but super admins can do anything, so it works
die( json_encode( array( 'success' => false, 'message' => esc_html__( 'Administrator permission is required', 'imsanity' ) ) ) );
}
if ( ! wp_verify_nonce( $_REQUEST['_wpnonce'], 'imsanity-bulk' ) ) {
die( json_encode( array( 'success' => false, 'message' => esc_html__( 'Access token has expired, please reload the page.', 'imsanity' ) ) ) );
}
}
/**
* Searches for up to 250 images that are candidates for resize and renders them
* to the browser as a json array, then dies
*/
function imsanity_get_images()
{
imsanity_verify_permission();
global $wpdb;
$offset = 0;
$limit = apply_filters( 'imsanity_attachment_query_limit', 3000 );
$results = array();
$maxW = imsanity_get_option( 'imsanity_max_width', IMSANITY_DEFAULT_MAX_WIDTH );
$maxH = imsanity_get_option( 'imsanity_max_height', IMSANITY_DEFAULT_MAX_HEIGHT );
$count = 0;
while( $images = $wpdb->get_results( "SELECT metas.meta_value as file_meta,metas.post_id as ID FROM $wpdb->postmeta metas INNER JOIN $wpdb->posts posts ON posts.ID = metas.post_id WHERE posts.post_type LIKE 'attachment' AND posts.post_mime_type LIKE 'image%%' AND posts.post_mime_type NOT LIKE 'image/bmp' AND metas.meta_key = '_wp_attachment_metadata' $attachment_query LIMIT $offset,$limit" ) ) {
/* $query = $wpdb->prepare(
"select
$wpdb->posts.ID as ID,
$wpdb->postmeta.meta_value as file_meta
from $wpdb->posts
inner join $wpdb->postmeta on $wpdb->posts.ID = $wpdb->postmeta.post_id and $wpdb->postmeta.meta_key = %s
where $wpdb->posts.post_type = %s
and $wpdb->posts.post_mime_type like %s
and $wpdb->posts.post_mime_type != %s",
array( '_wp_attachment_metadata', 'attachment', 'image%', 'image/bmp' )
);
$images = $wpdb->get_results($query);*/
// if ( $images ) {
foreach ( $images as $image ) {
$meta = unserialize( $image->file_meta );
if ( $meta['width'] > $maxW || $meta['height'] > $maxH ) {
$count++;
$results[] = array(
'id'=>$image->ID,
'width'=>$meta['width'],
'height'=>$meta['height'],
'file'=>$meta['file']
);
}
// make sure we only return a limited number of records so we don't overload the ajax features
if ( $count >= IMSANITY_AJAX_MAX_RECORDS ) break 2;
}
$offset += $limit;
// }
} // endwhile
die( json_encode( $results ) );
}
/**
* Resizes the image with the given id according to the configured max width and height settings
* renders a json response indicating success/failure and dies
*/
function imsanity_resize_image()
{
imsanity_verify_permission();
global $wpdb;
$id = (int) $_POST['id'];
if ( ! $id ) {
die( json_encode( array( 'success' => false, 'message' => esc_html__( 'Missing ID Parameter', 'imsanity' ) ) ) );
}
//$images = $wpdb->get_results( $query );
$meta = wp_get_attachment_metadata( $id );
if ( $meta && is_array( $meta ) ) {
$uploads = wp_upload_dir();
// TODO: we can do better here, sub in a version of the EWWW file finder
$oldPath = $uploads['basedir'] . "/" . $meta['file'];
if ( ! is_writable( $oldPath ) ) {
$msg = sprintf( esc_html__( '%s is not writable', 'imsanity' ), $oldPath );
die( json_encode( array( 'success' => false, 'message' => $msg ) ) );
}
$maxW = imsanity_get_option( 'imsanity_max_width', IMSANITY_DEFAULT_MAX_WIDTH );
$maxH = imsanity_get_option( 'imsanity_max_height', IMSANITY_DEFAULT_MAX_HEIGHT );
// method one - slow but accurate, get file size from file itself
list( $oldW, $oldH ) = getimagesize( $oldPath );
// method two - get file size from meta, fast but resize will fail if meta is out of sync
if ( ! $oldW || ! $oldH ) {
$oldW = $meta['width'];
$oldH = $meta['height'];
}
if ( ( $oldW > $maxW && $maxW > 0 ) || ( $oldH > $maxH && $maxH > 0 ) ) {
$quality = imsanity_get_option( 'imsanity_quality', IMSANITY_DEFAULT_QUALITY );
if ( $oldW > $maxW && $maxW > 0 && $oldH > $maxH && $maxH > 0 && apply_filters( 'imsanity_crop_image', false ) ) {
$newW = $maxW;
$newH = $maxH;
} else {
list( $newW, $newH ) = wp_constrain_dimensions( $oldW, $oldH, $maxW, $maxH );
}
$resizeResult = imsanity_image_resize( $oldPath, $newW, $newH, apply_filters( 'imsanity_crop_image', false ), null, null, $quality);
// $resizeResult = new WP_Error('invalid_image', __('Could not read image size'), $oldPath); // uncomment to debug fail condition
if ( $resizeResult && ! is_wp_error( $resizeResult ) ) {
$newPath = $resizeResult;
if ( $newPath != $oldPath && is_file( $newPath ) && filesize( $newPath ) < filesize( $oldPath ) ) {
// we saved some file space. remove original and replace with resized image
unlink( $oldPath );
rename( $newPath, $oldPath );
$meta['width'] = $newW;
$meta['height'] = $newH;
wp_update_attachment_metadata( $id, $meta );
$results = array( 'success'=>true, 'id'=> $id, 'message' => sprintf( esc_html__( 'OK: %s', 'imsanity' ) , $oldPath ) );
} elseif ( $newPath != $oldPath ) {
// theresized image is actually bigger in filesize (most likely due to jpg quality).
// keep the old one and just get rid of the resized image
if ( is_file( $newPath ) ) {
unlink( $newPath );
}
$results = array( 'success'=>false, 'id'=> $id, 'message' => sprintf( esc_html__( 'ERROR: %s (%s)', 'imsanity' ) , $oldPath, esc_html__( 'Resized image was larger than the original', 'imsanity' ) ) );
} else {
$results = array( 'success'=>false, 'id'=> $id, 'message' => sprintf( esc_html__( 'ERROR: %s (%s)', 'imsanity' ) , $oldPath, esc_html__( 'Unknown error, resizing function returned the same filename', 'imsanity' ) ) );
}
} else if ( $resizeResult === false ) {
$results = array(
'success' => false,
'id' => $id,
'message' => sprintf( esc_html__( 'ERROR: %s (%s)', 'imsanity' ), $oldPath, 'wp_get_image_editor missing' ),
);
} else {
$results = array(
'success' => false,
'id' => $id,
'message' => sprintf( esc_html__( 'ERROR: %s (%s)', 'imsanity' ), $oldPath, htmlentities( $resizeResult->get_error_message() ) )
);
}
} else {
$results = array('success'=>true,'id'=> $id, 'message' => sprintf( esc_html__( 'SKIPPED: %s (Resize not required)', 'imsanity' ) , $oldPath ) );
}
} else {
$results = array( 'success' => false, 'id'=> $id, 'message' => sprintf( esc_html__( 'ERROR: Attachment with ID of %s not found', 'imsanity' ) , htmlentities( $id ) ) );
}
// if there is a quota we need to reset the directory size cache so it will re-calculate
delete_transient( 'dirsize_cache' );
die( json_encode( $results ) );
}
?>
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