function acf_import_field_group($field_group)
{
// vars
$ref = array();
$order = array();
// extract fields
$fields = acf_extract_var($field_group, 'fields');
// format fields
$fields = acf_prepare_fields_for_import($fields);
// remove old fields
if ($field_group['ID']) {
// disable local - important as to avoid 'acf_get_fields_by_id' returning fields with ID = 0
acf_disable_local();
// load fields
$db_fields = acf_get_fields_by_id($field_group['ID']);
$db_fields = acf_prepare_fields_for_import($db_fields);
// get field keys
$keys = array();
foreach ($fields as $field) {
$keys[] = $field['key'];
}
// loop over db fields
foreach ($db_fields as $field) {
// add to ref
$ref[$field['key']] = $field['ID'];
if (!in_array($field['key'], $keys)) {
acf_delete_field($field['ID']);
}
}
// enable local - important as to allow local to find new fields and save json file
acf_enable_local();
}
// save field group
$field_group = acf_update_field_group($field_group);
// add to ref
$ref[$field_group['key']] = $field_group['ID'];
// add to order
$order[$field_group['ID']] = 0;
// add fields
foreach ($fields as $field) {
// add ID
if (!$field['ID'] && isset($ref[$field['key']])) {
$field['ID'] = $ref[$field['key']];
}
// add parent
if (empty($field['parent'])) {
$field['parent'] = $field_group['ID'];
} elseif (isset($ref[$field['parent']])) {
$field['parent'] = $ref[$field['parent']];
}
// add field menu_order
if (!isset($order[$field['parent']])) {
$order[$field['parent']] = 0;
}
$field['menu_order'] = $order[$field['parent']];
$order[$field['parent']]++;
// save field
$field = acf_update_field($field);
// add to ref
$ref[$field['key']] = $field['ID'];
}
// return new field group
return $field_group;
}
function import()
{
// validate
if (empty($_FILES['acf_import_file'])) {
acf_add_admin_notice(__("No file selected", 'acf'), 'error');
return;
}
// vars
$file = $_FILES['acf_import_file'];
// validate error
if ($file['error']) {
acf_add_admin_notice(__('Error uploading file. Please try again', 'acf'), 'error');
return;
}
// validate type
if (pathinfo($file['name'], PATHINFO_EXTENSION) !== 'json') {
acf_add_admin_notice(__('Incorrect file type', 'acf'), 'error');
return;
}
// read file
$json = file_get_contents($file['tmp_name']);
// decode json
$json = json_decode($json, true);
// validate json
if (empty($json)) {
acf_add_admin_notice(__('Import file empty', 'acf'), 'error');
return;
}
// if importing an auto-json, wrap field group in array
if (isset($json['key'])) {
$json = array($json);
}
// vars
$ids = array();
$keys = array();
$imported = array();
// populate keys
foreach ($json as $field_group) {
// append key
$keys[] = $field_group['key'];
}
// look for existing ids
foreach ($keys as $key) {
// attempt find ID
$field_group = _acf_get_field_group_by_key($key);
// bail early if no field group
if (!$field_group) {
continue;
}
// append
$ids[$key] = $field_group['ID'];
}
// enable local
acf_enable_local();
// reset local (JSON class has already included .json field groups which may conflict)
acf_reset_local();
// add local field groups
foreach ($json as $field_group) {
// add field group
acf_add_local_field_group($field_group);
}
// loop over keys
foreach ($keys as $key) {
// vars
$field_group = acf_get_local_field_group($key);
// attempt get id
$id = acf_maybe_get($ids, $key);
if ($id) {
$field_group['ID'] = $id;
}
// append fields
if (acf_have_local_fields($key)) {
$field_group['fields'] = acf_get_local_fields($key);
}
// import
$field_group = acf_import_field_group($field_group);
// append message
$imported[] = array('ID' => $field_group['ID'], 'title' => $field_group['title'], 'updated' => $id ? 1 : 0);
}
// messages
if (!empty($imported)) {
// vars
$links = array();
$count = count($imported);
$message = sprintf(_n('Imported 1 field group', 'Imported %s field groups', $count, 'acf'), $count) . '.';
// populate links
foreach ($imported as $import) {
$links[] = '<a href="' . admin_url("post.php?post={$import['ID']}&action=edit") . '" target="_blank">' . $import['title'] . '</a>';
}
// append links
$message .= ' ' . implode(', ', $links);
// add notice
acf_add_admin_notice($message);
}
}