/**
 * Plugin Name: Pods - User Relationship Roles
 * Description: Set default user role for Add New button on Pods relationship fields when filtered to display only one user role.
 * Version: 1
 * Plugin URI: https://podswp.slack.com/archives/C02SVLHQF/p1723574513532549
 */

// Change Add New button for Pods user relationship fields.
add_filter(
	'pods_ui_dfv_pick_modals_iframe',
	function( $iframe, $config, $args ) {
		if (
			// Relationship field.
			'pick' === $config['type']
			// To users.
			&& 'user' === $config['pick_object']
			// Filtered to one role in field settings.
			&& 1 === count( (array) $config['pick_user_role'] )
		) {
			// Get role from field setting.
			$role = $config['pick_user_role'][0];
			
			// Send role to the iframe.
			$iframe['src'] = add_query_arg( 'role', $role, $iframe['src'] );
			$iframe['query_args']['role'] = $role;
			
			// Add role to title of iframe.
			$iframe['title_add'] = sprintf( '%s %s', $iframe['title_add'], ucwords( $role ) );
		}
		return $iframe;
	},
	20,
	3
);

// Hide Role field from user interface if already set by filter pods_ui_dfv_pick_modals_iframe.
if (
	false !== strpos( $_SERVER['SCRIPT_FILENAME'], '/wp-admin/user-new.php' )
	&& array_key_exists( 'pods_modal', $_GET )
	&& array_key_exists( 'role', $_GET )
) {
	add_action(
		'admin_footer',
		function() {
			?>
<script id="pods-default-role">
( function() {
	// Get Role select menu and new role.
	let roleSelect = document.getElementById("role");
	let newRole = '<?php echo esc_js( sanitize_key( $_GET['role'] ) ); ?>';

	// Change the selection.
	roleSelect.querySelector('option[selected="selected"]').selected = false;
	roleSelect.querySelector('option[value="'   newRole   '"]').selected = true;	

	// Hide the row.
	roleSelect.parentNode.parentNode.style.display = 'none';
} )();
</script>
			<?php
		}
	);
}