Sliced Invoices Deposit Invoices Extension: Auto convert accepted quotes into deposit invoices

functions.php

add_action( 'sliced_client_accepted_quote', 'sliced_auto_create_deposit' );
function sliced_auto_create_deposit( $id ) {
	global $wpdb;
	
	$amount = '40';          // 40% deposit, adjust if needed
	$type = 'percentage';    // 'percentage' or 'amount'
	
	// **** don't edit below here ****
	update_post_meta( $id, '_sliced_invoice_deposit', array( 'amount' => $amount, 'type' => $type ) );
	if ( function_exists( 'sliced_get_accepted_payment_methods' ) ) {
		$payment = sliced_get_accepted_payment_methods();
		update_post_meta( $id, '_sliced_payment_methods', array_keys($payment) );
	}
	$parent_invoice = get_post( $id );
	$args = apply_filters( 'sliced_deposit_invoice_args', array(
		'post_title'      => __( 'Deposit -', 'sliced-invoices-deposit' ) . ' ' . $parent_invoice->post_title,
		'post_content'    => $parent_invoice->post_content,
		'post_status'     => 'publish',
		'post_type'       => 'sliced_invoice',
		'post_parent'     => $parent_invoice->ID,
		'post_password'   => $parent_invoice->post_password,
		'post_date'       => $parent_invoice->post_date,
	) );
	$new_invoice_id = wp_insert_post( $args );
	$taxonomies = get_object_taxonomies($parent_invoice->post_type);
	foreach ($taxonomies as $taxonomy) {
		$post_terms = wp_get_object_terms($parent_invoice->ID, $taxonomy, array('fields' => 'slugs'));
		wp_set_object_terms($new_invoice_id, $post_terms, $taxonomy, false);
	}
	$post_meta_infos = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->postmeta WHERE post_id=$parent_invoice->ID");
	if (count($post_meta_infos)!=0) {
		$sql_query = "INSERT INTO $wpdb->postmeta (post_id, meta_key, meta_value) ";
		foreach ($post_meta_infos as $meta_info) {
			$meta_key = $meta_info->meta_key;
			$meta_value = addslashes($meta_info->meta_value);
			$sql_query_sel[]= "SELECT $new_invoice_id, '$meta_key', '$meta_value'";
		}
		$sql_query.= implode(" UNION ALL ", $sql_query_sel);
		$wpdb->query($sql_query);
	}
	$number = sliced_get_invoice_number( $id );
	update_post_meta( $new_invoice_id, '_sliced_invoice_number', $number . '-1' );
	update_post_meta( $new_invoice_id, '_sliced_deposit_parent', $id );
	update_post_meta( $id, '_sliced_deposit_child', $new_invoice_id );
}