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wp-content/plugins/flexible-checkout-fields/classes/user-meta-checkout.php

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+<?php
+/**
+ * User meta hooks.
+ *
+ * @package Flexible Checkout Fields
+ */
+
+/**
+ * Handles user meta on checkout.
+ */
+class Flexible_Checkout_Fields_User_Meta_Checkout {
+
+	/**
+	 * Plugin.
+	 *
+	 * @var Flexible_Checkout_Fields_Plugin
+	 */
+	protected $plugin;
+
+	/**
+	 * .
+	 *
+	 * @var Flexible_Checkout_Fields_User_Meta
+	 */
+	private $user_meta;
+
+	/**
+	 * Flexible_Checkout_Fields_User_Profile constructor.
+	 *
+	 * @param Flexible_Checkout_Fields_Plugin    $plugin Plugin.
+	 * @param Flexible_Checkout_Fields_User_Meta $user_meta .
+	 */
+	public function __construct( Flexible_Checkout_Fields_Plugin $plugin, Flexible_Checkout_Fields_User_Meta $user_meta ) {
+		$this->plugin    = $plugin;
+		$this->user_meta = $user_meta;
+	}
+
+	/**
+	 * Hooks.
+	 */
+	public function hooks() {
+		add_filter( 'woocommerce_checkout_update_user_meta', array( $this, 'update_customer_meta_fields_on_checkout' ), 10, 2 );
+	}
+
+	/**
+	 * Update customer meta data on checkout.
+	 *
+	 * @param int   $customer_id Customer ID.
+	 * @param array $data Posted checkout data.
+	 */
+	public function update_customer_meta_fields_on_checkout( $customer_id, $data ) {
+		$this->user_meta->update_customer_meta_fields( $customer_id, $data );
+	}
+}