bp_nouveau_ajax_document_child_folder_save()

function bp_nouveau_ajax_document_child_folder_save() {
	$response = array(
		'feedback' => esc_html__( 'There was a problem performing this action. Please try again.', 'buddyboss' ),
	);

	// Bail if not a POST action.
	if ( ! bp_is_post_request() ) {
		wp_send_json_error( $response );
	}

	if ( empty( $_POST['_wpnonce'] ) ) {
		wp_send_json_error( $response );
	}

	// Use default nonce.
	$nonce = filter_input( INPUT_POST, '_wpnonce', FILTER_SANITIZE_STRING );
	$check = 'bp_nouveau_media';

	// Nonce check!
	if ( empty( $nonce ) || ! wp_verify_nonce( $nonce, $check ) ) {
		wp_send_json_error( $response );
	}

	if ( empty( $_POST['title'] ) ) {
		$response['feedback'] = esc_html__( 'Please enter title of folder.', 'buddyboss' );
		wp_send_json_error( $response );
	}

	if ( ! is_user_logged_in() ) {
		$response['feedback'] = esc_html__( 'Please login to create a folder.', 'buddyboss' );
		wp_send_json_error( $response );
	}

	if ( strpbrk( $_POST['title'], "\\/?%*:|\"<>" ) !== false ) {
		$response['feedback'] = esc_html__( "Invalid folder name", 'buddyboss' );
		wp_send_json_error( $response );
	}

	// save folder.
	$id        = 0;
	$group_id  = ! empty( $_POST['group_id'] ) ? (int) $_POST['group_id'] : false;
	$title     = wp_strip_all_tags( $_POST['title'] );
	$folder_id = ! empty( $_POST['folder_id'] ) ? (int) filter_input( INPUT_POST, 'folder_id', FILTER_VALIDATE_INT ) : 0;
	$privacy   = '';

	if ( $folder_id > 0 ) {
		$parent_folder = BP_Document_Folder::get_folder_data( array( $folder_id ) );
		$privacy       = $parent_folder[0]->privacy;
	}

	if ( (int) $folder_id > 0 ) {
		$has_access = bp_folder_user_can_edit( $folder_id );
		if ( ! $has_access ) {
			$response['feedback'] = esc_html__( 'You don\'t have permission to create folder inside this folder.', 'buddyboss' );
			wp_send_json_error( $response );
		}
	}

	$folder_id = bp_folder_add(
		array(
			'id'       => false,
			'title'    => $title,
			'privacy'  => $privacy,
			'group_id' => $group_id,
			'parent'   => $folder_id,
		)
	);

	if ( ! $folder_id ) {
		$response['feedback'] = esc_html__( 'There was a problem when trying to create the folder.', 'buddyboss' );
		wp_send_json_error( $response );
	}

	$folder = new BP_Document_Folder( $folder_id );

	if ( $group_id > 0 ) {
		$ul = bp_document_user_document_folder_tree_view_li_html( $folder->user_id, $group_id );
	} else {
		$ul = bp_document_user_document_folder_tree_view_li_html( bp_loggedin_user_id() );
	}

	$document = '';
	if ( ! empty( $folder_id ) ) {
		ob_start();
		if ( bp_has_folders( array( 'include' => $folder_id ) ) ) {
			while ( bp_folder() ) {
				bp_the_folder();
				bp_get_template_part( 'document/document-entry' );
			}
		}
		$document = ob_get_contents();
		ob_end_clean();
	}

	$response = array(
		'document'  => $document,
		'tree_view' => $ul,
		'folder_id' => $folder_id,
	);

	wp_send_json_success( $response );
}