FlowMattic Magic Link & FluentCRM Tags

// 1) Enqueue AJAX script
function hoc_enqueue_ajax_script() {
    if ( is_user_logged_in() ) {
        wp_enqueue_script( 'hoc-ajax', '', [ 'jquery' ], null, true );
        wp_localize_script( 'hoc-ajax', 'HOC_Ajax', [
            'ajax_url' => admin_url( 'admin-ajax.php' ),
            'nonce'    => wp_create_nonce( 'hoc_click' ),
        ] );
        wp_add_inline_script( 'hoc-ajax', <<<'JS'
jQuery(function($){
  $('.hide-on-click').on('click', function(){
    var linkId = $(this).data('link-id');
    $.post(HOC_Ajax.ajax_url, {
      action: 'hoc_mark_clicked',
      nonce: HOC_Ajax.nonce,
      link_id: linkId
    });
    $(this).hide();
  });
});
JS
        );
    }
}
add_action( 'wp_enqueue_scripts', 'hoc_enqueue_ajax_script' );

// 2) Ajax handler: save to user meta
function hoc_mark_clicked() {
    check_ajax_referer( 'hoc_click', 'nonce' );
    if ( ! is_user_logged_in() || empty( $_POST['link_id'] ) ) {
        wp_send_json_error();
    }
    $user_id = get_current_user_id();
    $clicked = get_user_meta( $user_id, 'hoc_clicked_links', true ) ?: [];
    if ( ! in_array( $_POST['link_id'], $clicked, true ) ) {
        $clicked[] = sanitize_text_field( wp_unslash( $_POST['link_id'] ) );
        update_user_meta( $user_id, 'hoc_clicked_links', $clicked );
    }
    wp_send_json_success();
}
add_action( 'wp_ajax_hoc_mark_clicked', 'hoc_mark_clicked' );

// 3) Filter content to hide links already clicked
function hoc_filter_content( $content ) {
    if ( is_user_logged_in() ) {
        $clicked = get_user_meta( get_current_user_id(), 'hoc_clicked_links', true ) ?: [];
        // remove any anchors whose data-link-id is in the clicked list
        foreach ( $clicked as $id ) {
            // simple regex to strip that link (assumes no nested <a>)
            $pattern = sprintf(
              '#<a\b([^>]*?)\sdata-link-id=["\']%s["\'].*?<\/a>#i',
              preg_quote( $id, '#' )
            );
            $content = preg_replace( $pattern, '', $content );
        }
    }
    return $content;
}
add_filter( 'the_content', 'hoc_filter_content', 20 );

/**
 * Name: FluentCRM User Tag Helpers
 * Description: Helper functions to retrieve and check FluentCRM tags for a user by email or WP user ID.
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly
}

/**
 * Initialize our helpers after all plugins are loaded.
 */
add_action( 'plugins_loaded', 'fcrm_user_tag_helpers_init', 20 );
function fcrm_user_tag_helpers_init() {
    // Ensure FluentCRM is active
    if ( ! function_exists( 'FluentCrmApi' ) ) {
        add_action( 'admin_notices', function() {
            echo '<div class="notice notice-error"><p><strong>FluentCRM User Tag Helpers</strong>: FluentCRM plugin is not active. Please install and activate FluentCRM.</p></div>';
        } );
        return;
    }

    /**
     * Retrieve all tag slugs for a FluentCRM contact by email or WP user ID.
     *
     * @param int|string $user_identifier WP user ID or email address.
     * @return string[] Array of tag slugs (empty if none or contact not found).
     */
    function get_fluentcrm_user_tags( $user_identifier ) {
        $contactApi = FluentCrmApi( 'contacts' );
        $subscriber = is_numeric( $user_identifier )
            ? $contactApi->getContactByUserRef( absint( $user_identifier ) )
            : $contactApi->getContact( sanitize_email( $user_identifier ) );

        if ( ! $subscriber ) {
            return [];
        }

        return $subscriber->tags->pluck( 'slug' )->toArray();
    }

    /**
     * Check if a FluentCRM contact has a specific tag slug.
     *
     * @param int|string $user_identifier WP user ID or email address.
     * @param string     $tag_slug        The tag slug to check.
     * @return bool     True if the contact has the tag; false otherwise.
     */
    function user_has_fluentcrm_tag( $user_identifier, $tag_slug ) {
        // Get all tag slugs for this user
        $tags = get_fluentcrm_user_tags( $user_identifier );
        // Check for slug in array
        return in_array( sanitize_title( $tag_slug ), $tags, true );
    }
}