Actually, it would be a bit more complicated now that I’ve looked into it a little more. It’s going to take a combination of hooks to change the save path based on a specific field group and a way to keep track of what field is being saved.
Please note that I have not tested this at all. It should work if I have not missed anything. I thought it was interesting and something that people might use. Please read the comments in my example.
<?php
// for this I am creating a class so that we can
// easily store infomation in one filter and then
// retrieve it in another
new acf_save_json_based_on_group_key();
class acf_save_json_based_on_group_key {
// $groups is an array of field group key => path pairs
// these will be set later
private $groups = array();
// this variable will store the current group key
// that is being saved so that we can retrieve it later
private $current_group_being_saved;
public function __construct() {
// this init action will set up the save paths
add_action('admin_init', array($this, 'admin_init'));
// this action is called by ACF before saving a field group
// the priority is set to 1 so that it runs before the internal ACF action
add_action('acf/update_field_group', array($this, 'update_field_group'), 1, 1);
} // end public function __construct
public function admin_init() {
// in this function we set up the paths where we want to store JSON files
// in this example we're creating two folders in the theme header and footer
// change the field groups and keys based on your groups
$footer = get_stylesheet_directory().'/modules/footer';
$header = get_stylesheet_directory().'/modules/header';
$this->groups = array(
'group_584d5b7986f02' => $header,
'group_584d5b7986f03' => $footer
);
} // end public function admin_init
public function update_field_group($group) {
// the purpose of this function is to see if we want to
// change the location where this group is saved
// and if we to to add a filter to alter the save path
// first check to see if this is one of our groups
if (!isset($this->groups[$group['key']])) {
// not one or our groups
return $group;
}
// store the group key and add action
$this->current_group_being_saved = $group['key'];
add_action('acf/settings/save_json', array($this, 'override_json_location'), 9999);
// don't forget to return the groups
return $group;
} // end public function update_field_group
public function override_json_location($path) {
// alter the path based on group being saved and
// our save locations
$path = $this->groups[$this->current_group_being_saved];
return $path;
} // end public function override_json_location
} // end class acf_save_json_based_on_group_key
?>
