ACF. How to update repeater field with files? - wordpress

Question

I am trying to update my repeater field from front end-with files. In case with one field file - it works. But when I'm trying to fill repeater with files it doesn't work.
// JS. Ajaxly sending files
var ajaxurl = '<?php echo site_url() ?>/wp-admin/admin-ajax.php';
$('.js-new-msg-send').click(function (e) {
e.preventDefault();
var form = document.forms.namedItem("new_theme");
var formData = new FormData(form);
formData.append('user_id', '<?php echo $userID; ?>');
formData.append('action', 'msg_to_acf');
var xhr = new XMLHttpRequest();
xhr.open('POST', ajaxurl, true);
xhr.send(formData);
})
I found function to handle files uploading to acf field and modified it to handle multiple files from $_FILES variable:
// FOR MULTIPLE FILES
if ( !empty($_FILES[$f]['name']) && is_array($_FILES[$f]['name']) ) {
require_once( ABSPATH . 'wp-admin/includes/file.php' );
require_once( ABSPATH . 'wp-admin/includes/image.php' );
$file_list = array();
foreach ($_FILES[$f]['name'] as $key => $value) {
$temp_file = array(
'name' => $_FILES[$f]['name'][$key],
'type' => $_FILES[$f]['type'][$key],
'tmp_name' => $_FILES[$f]['tmp_name'][$key],
'error' => $_FILES[$f]['error'][$key],
'size' => $_FILES[$f]['size'][$key]
);
wp_update_attachment_metadata( $pid, $temp_file );
$file = wp_handle_upload( $temp_file , array('test_form' => FALSE, 'action' => 'editpost') );
if ( isset( $file['error'] )) {
return new WP_Error( 'upload_error', $file['error'] );
}
$file_type = wp_check_filetype($temp_file['name'], array(
'jpg|jpeg' => 'image/jpeg',
'gif' => 'image/gif',
'png' => 'image/png',
));
if ($file_type['type']) {
$name_parts = pathinfo( $file['file'] );
$name = $file['filename'];
$type = $file['type'];
$title = $t ? $t : $name;
$content = $c;
$attachment = array(
'post_title' => $title,
'post_type' => 'attachment',
'post_content' => $content,
'post_parent' => $pid,
'post_mime_type' => $type,
'guid' => $file['url'],
);
foreach( get_intermediate_image_sizes() as $s ) {
$sizes[$s] = array( 'width' => '', 'height' => '', 'crop' => true );
$sizes[$s]['width'] = get_option( "{$s}_size_w" ); // For default sizes set in options
$sizes[$s]['height'] = get_option( "{$s}_size_h" ); // For default sizes set in options
$sizes[$s]['crop'] = get_option( "{$s}_crop" ); // For default sizes set in options
}
$sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes );
foreach( $sizes as $size => $size_data ) {
$resized = image_make_intermediate_size( $file['file'], $size_data['width'], $size_data['height'], $size_data['crop'] );
if ( $resized )
$metadata['sizes'][$size] = $resized;
}
$attach_id = wp_insert_attachment( $attachment, $file['file'] /*, $pid - for post_thumbnails*/);
if ( !is_wp_error( $id )) {
$attach_meta = wp_generate_attachment_metadata( $attach_id, $file['file'] );
wp_update_attachment_metadata( $attach_id, $attach_meta );
}
$final_temp_arr = array(
'pid' =>$pid,
'url' =>$file['url'],
'file'=>$file,
'attach_id'=>$attach_id
);
array_push($file_list, $final_temp_arr);
}
}
return $file_list;
}
In final, I using this function to get an array of information with attach-id variable that I inserting to repeater.
$att = my_update_attachment( 'msg-file-list' , $post_id );
$files_final_list = array();
foreach ($att as $key => $val) {
array_push($files_final_list, $val['attach_id']);
}
$value_arr = array(
array(
"msg-author" => $user_name,
"msg-date" => $date,
"msg-read-check" => true,
"msg-cont" => $msg_cont,
'msg-file-list' => $files_final_list
)
);
update_field( 'test_file_list' , $files_final_list , $post_id );
I guess that mistake is in last part , where I trying to upload files to repeater. Can someone show me what I'am doing wrong? Thanks for helping.