add mailchimp data to personal data export; patch supplied by @DavidAnderson684

Author: dannyvankooten

CHANGELOG.md

@@ -1,6 +1,11 @@
 Changelog
 =========
 
+#### In development
+
+- Add Mailchimp data to Personal Data exporter. Contributed by [David Anderson from UpdraftPlus](https://updraftplus.com/).
+
+
 #### 4.10.1 - Feb 06, 2025
 
 - Fix JS error breaking Ninja Forms edit form page when not connected to a Mailchimp account or account has no audiences.

autoload.php

@@ -31,6 +31,7 @@
         'MC4WP_Dynamic_Content_Tags' => '/includes/class-dynamic-content-tags.php',
         'MC4WP_Easy_Digital_Downloads_Integration' => '/integrations/easy-digital-downloads/class-easy-digital-downloads.php',
         'MC4WP_Events_Manager_Integration' => '/integrations/events-manager/class-events-manager.php',
+        'MC4WP_Personal_Data_Exporter' => '/includes/class-personal-data-exporter.php',
         'MC4WP_Field_Formatter' => '/includes/class-field-formatter.php',
         'MC4WP_Field_Guesser' => '/includes/class-field-guesser.php',
         'MC4WP_Form' => '/includes/forms/class-form.php',

includes/class-personal-data-exporter.php

@@ -0,0 +1,86 @@
+<?php
+
+/**
+ * Class MC4WP_Exporter
+ */
+class MC4WP_Personal_Data_Exporter
+{
+    /**
+     * Registers the personal data exporter for comments.
+     *
+     * @param array[] $exporters An array of personal data exporters.
+     * @return array[] An array of personal data exporters.
+     */
+    public static function add_mailchimp_to_privacy_export($exporters)
+    {
+        $exporters['mailchimp-subscriptions'] = [
+            'exporter_friendly_name' => __('Mailchimp Subscriptions'),
+            'callback' => [self::class, 'get_mailchimp_subscription_data']
+        ];
+
+        return $exporters;
+    }
+
+    /**
+     * Retrieves the Mailchimp subscription data for a given email address.
+     *
+     * This method uses the Mailchimp for WordPress (MC4WP) API to search for members based on the provided
+     * email address and returns a list of Mailchimp lists the user is subscribed to, if any.
+     *
+     * @param string $email_address The email address of the user to search for.
+     *
+     * @return array An array containing the user's Mailchimp subscription data:
+     *               - 'data' (array): The subscription information, including:
+     *                 - 'group_id' (string): The group identifier for Mailchimp.
+     *                 - 'group_label' (string): The label for the group ('Mailchimp Subscriptions').
+     *                 - 'item_id' (string): The item identifier ('mailchimp-subscriptions').
+     *                 - 'data' (array): The subscription details, with:
+     *                   - 'name' (string): The label ('Mailchimp List').
+     *                   - 'value' (string): A comma-separated list of Mailchimp lists the user is subscribed to.
+     *               - 'done' (bool): Indicates the completion of the process (always true).
+     */
+    public static function get_mailchimp_subscription_data($email_address)
+    {
+        $api = mc4wp_get_api_v3();
+        $client = $api->get_client();
+        $data = $client->get('search-members?query=' . urlencode($email_address));
+
+        // Parse the API response to get the lists the user is subscribed to.
+        $subscribed_lists = [];
+        $data_to_export = [];
+
+        if (!empty($data->exact_matches->members)) {
+            $lists = $api->get_lists();
+            foreach ($data->exact_matches->members as $member) {
+                // Fetch the user's subscribed lists.
+                if (isset($member->list_id)) {
+                    foreach ($lists as $list) {
+                        if ($list->id == $member->list_id) {
+                            $subscribed_lists[] = $list->name;
+                            continue;
+                        }
+                    }
+                }
+            }
+        }
+
+        if ($subscribed_lists) {
+            $data_to_export[] = [
+                'group_id' => 'mailchimp',
+                'group_label' => __('Mailchimp Subscriptions', 'mailchimp-for-wp'),
+                'item_id' => 'mailchimp-subscriptions',
+                'data' => [
+                    [
+                        'name'  => __('Mailchimp Lists', 'mailchimp-for-wp'),
+                        'value' => implode(', ', $subscribed_lists),
+                    ]
+                ]
+            ];
+        }
+
+        return [
+            'data' => $data_to_export,
+            'done' => true,
+        ];
+    }
+}

includes/default-filters.php

@@ -10,6 +10,7 @@
 add_filter('mc4wp_integration_data', '_mc4wp_update_groupings_data', PHP_INT_MAX);
 add_filter('mailchimp_sync_user_data', '_mc4wp_update_groupings_data', PHP_INT_MAX);
 add_filter('mc4wp_use_sslverify', '_mc4wp_use_sslverify', 1);
+add_filter('wp_privacy_personal_data_exporters', [MC4WP_Personal_Data_Exporter::class, 'add_mailchimp_to_privacy_export']);
 
 mc4wp_apply_deprecated_filters('mc4wp_merge_vars', 'mc4wp_form_data');
 mc4wp_apply_deprecated_filters('mc4wp_form_merge_vars', 'mc4wp_form_data');