<?php
/**
* Imsanity AJAX functions.
*
* @package Imsanity
*/
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( 'activate_plugins' ) ) { // 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;
$images = $wpdb->get_results( $wpdb->prepare( "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 = 'attachment' AND posts.post_mime_type LIKE %s AND posts.post_mime_type != 'image/bmp' AND metas.meta_key = '_wp_attachment_metadata' ORDER BY ID DESC LIMIT %d,%d", '%image%', $offset, $limit ) );
/* $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' LIMIT $offset,$limit" ); */
while ( $images ) {
foreach ( $images as $image ) {
$imagew = false;
$imageh = false;
$meta = unserialize( $image->file_meta );
if ( imsanity_get_option( 'imsanity_deep_scan', false ) ) {
$file_path = imsanity_attachment_path( $meta, $image->ID, '', false );
if ( $file_path ) {
list( $imagew, $imageh ) = getimagesize( $file_path );
}
}
if ( empty( $imagew ) || empty( $imageh ) ) {
$imagew = $meta['width'];
$imageh = $meta['height'];
}
if ( $imagew > $maxw || $imageh > $maxh ) {
$count++;
$results[] = array(
'id' => $image->ID,
'width' => $imagew,
'height' => $imageh,
'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;
$images = $wpdb->get_results( $wpdb->prepare( "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 = 'attachment' AND posts.post_mime_type LIKE %s AND posts.post_mime_type != 'image/bmp' AND metas.meta_key = '_wp_attachment_metadata' ORDER BY ID DESC LIMIT %d,%d", '%image%', $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' ),
)
)
);
}
$meta = wp_get_attachment_metadata( $id );
if ( $meta && is_array( $meta ) ) {
$uploads = wp_upload_dir();
$oldpath = imsanity_attachment_path( $meta['file'], $id, '', false );
if ( ! is_writable( $oldpath ) ) {
/* translators: %s: File-name of the image */
$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 );
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,
/* translators: %s: File-name of the image */
'message' => sprintf( esc_html__( 'OK: %s', 'imsanity' ), $oldpath ),
);
} elseif ( $newpath != $oldpath ) {
// the resized 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' => $id,
/* translators: 1: File-name of the image 2: the error message, translated elsewhere */
'message' => sprintf( esc_html__( 'ERROR: %1$s (%2$s)', 'imsanity' ), $oldpath, esc_html__( 'Resized image was larger than the original', 'imsanity' ) ),
);
} else {
$results = array(
'success' => false,
'id' => $id,
/* translators: 1: File-name of the image 2: the error message, translated elsewhere */
'message' => sprintf( esc_html__( 'ERROR: %1$s (%2$s)', 'imsanity' ), $oldpath, esc_html__( 'Unknown error, resizing function returned the same filename', 'imsanity' ) ),
);
}
} elseif ( false === $resizeresult ) {
$results = array(
'success' => false,
'id' => $id,
/* translators: 1: File-name of the image 2: the error message, translated elsewhere */
'message' => sprintf( esc_html__( 'ERROR: %1$s (%2$s)', 'imsanity' ), $oldpath, esc_html__( 'wp_get_image_editor missing', 'imsanity' ) ),
);
} else {
$results = array(
'success' => false,
'id' => $id,
/* translators: 1: File-name of the image 2: the error message, translated elsewhere */
'message' => sprintf( esc_html__( 'ERROR: %1$s (%2$s)', 'imsanity' ), $oldpath, htmlentities( $resizeresult->get_error_message() ) ),
);
}
} else {
$results = array(
'success' => true,
'id' => $id,
/* translators: %s: File-name of the image */
'message' => sprintf( esc_html__( 'SKIPPED: %s (Resize not required)', 'imsanity' ), $oldpath ) . " -- $oldw x $oldh",
);
if ( empty( $meta['width'] ) || empty( $meta['height'] ) ) {
if ( empty( $meta['width'] ) || $meta['width'] > $oldw ) {
$meta['width'] = $oldw;
}
if ( empty( $meta['height'] ) || $meta['height'] > $oldh ) {
$meta['height'] = $oldh;
}
wp_update_attachment_metadata( $id, $meta );
}
}
} else {
$results = array(
'success' => false,
'id' => $id,
/* translators: %s: ID number of the image */
'message' => sprintf( esc_html__( 'ERROR: Attachment with ID of %d not found', 'imsanity' ), intval( $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 ) );
}